Fin, heat exchanger and duct type air conditioner

Abstract

The invention relates to the technical field of air conditioners, and discloses a fin which comprises an upper fin section, a lower fin section, an upper fin section and a lower fin section. The middle fin section is arranged on the lower portion of the upper fin section and connected with the upper fin section in a bent mode, and the middle fin section comprises linear second side contour lines which are parallel to one another, and the distance between the linear second side contour lines is W2; the lower fin section is arranged on the lower portion of the middle fin section and connected with the middle fin section in a bent mode, and the lower fin section comprises linear third side contour lines which are parallel to one another, and the distance between the linear third side contour lines is W3. The included angle between the first windward side contour line and the second windward side contour line is a first plate section included angle alpha, the included angle between the second windward side contour line and the third windward side contour line is a second plate section included angle beta, and alpha is larger than or equal to 100 degrees; and / or beta is greater than or equal to 100 degrees. According to the fin, the overall heat exchange efficiency of a heat exchanger is improved. Meanwhile, the invention further discloses a heat exchanger and a duct type air conditioner.

Description

[0001] This application claims priority to the Chinese patent application entitled “Air Conditioner” and application number 202422612380.6 filed on October 28, 2024 and the Chinese patent application entitled “Heat Exchanger and Air Conditioner Indoor Unit with Arc-Shaped Fins” and application number 202423186322.8 filed on December 23, 2024, and the entire contents of which are incorporated herein by reference. Technical Field

[0002] The present application relates to the technical field of household appliances, for example, to a fin, a heat exchanger and an air duct machine. Background Art

[0003] In air conditioners, the heat exchanger, consisting of the evaporator and condenser, is the primary energy-consuming component. Its performance directly impacts the unit's energy consumption. Fin-tube heat exchangers are widely used in wall-mounted, floor-standing, and ducted household air conditioners. The thermal resistance on the outside of the tubes, typically accounting for 70%-90% of the total thermal resistance, determines the overall performance of the heat exchanger.

[0004] During the implementation of the embodiments of the present disclosure, it was found that at least the following problems exist in the related art:

[0005] Taking the indoor unit of a ducted air conditioner as an example, an I-type oblique heat exchanger is often used. However, in the case of uneven wind field distribution, this type of heat exchanger does not have sufficient heat exchange area in the high wind speed area formed by the indoor fan, while there is excess heat exchange area in the low wind speed area. As a result, the performance of the heat exchanger cannot be fully utilized, reducing the heat exchange efficiency of the heat exchanger.

[0006] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of this application, and therefore may include information that does not constitute prior art known to ordinary technicians in this field. Summary of the Invention

[0007] In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. The summary is not an extensive review, nor is it intended to identify key / critical elements or delineate the scope of protection of these embodiments, but rather serves as a prelude to the detailed description that follows.

[0008] The embodiments of the present disclosure provide a fin, a heat exchanger, and an air duct unit, which improve the overall heat exchange efficiency of the heat exchanger.

[0009] In some embodiments, the fin includes: an upper wing segment, including a straight first side contour line that is parallel to each other and has a spacing of W1; a middle wing segment, arranged at the lower part of the upper wing segment and bent connected to the upper wing segment, the middle wing segment includes a straight second side contour line that is parallel to each other and has a spacing of W2; and a lower wing segment, arranged at the lower part of the middle wing segment and bent connected to the middle wing segment, the lower wing segment includes a straight third side contour line that is parallel to each other and has a spacing of W3, the first side contour line includes a first leeward side contour line and a first windward side contour line, the second side contour line includes a second leeward side contour line and a second windward side contour line, the third side contour line includes a third leeward side contour line and a third windward side contour line, the angle between the first windward side contour line and the second windward side contour line is the first plate segment angle α, and the angle between the second windward side contour line and the third windward side contour line is the second plate segment angle β, wherein α≥100°; and / or β≥100°.

[0010] In some optional embodiments, α≤170°; and / or β≤170°.

[0011] In some optional embodiments, the midpoint of the line connecting the upper endpoint of the first windward side contour line and the lower endpoint of the third windward side contour line is set as reference point F, the fourth angle of the second windward side contour line corresponding to reference point F is e1, the fifth angle of the first windward side contour line corresponding to reference point F is e2, and the sixth angle of the third windward side contour line corresponding to reference point F is e3, wherein, 30°≤e1≤160°; and / or, 15°≤e2≤100°; and / or, 15°≤e3≤100°.

[0012] In some optional embodiments, 27°≤e1≤67°; and / or, 45°≤e2≤75°; and / or, 62°≤e3≤92°.

[0013] In some optional embodiments, 0.3≤e1 / e2≤1; and / or, 0.25≤e1 / e3≤0.85.

[0014] In some optional embodiments, e2≠e3, and 50°≤e1≤80°; and / or 18°≤e2≤48°; and / or 65°≤e3≤95°.

[0015] In some optional embodiments, 1.7≤e1 / e2≤2.3; and / or, 0.5≤e1 / e3≤1.2.

[0016] In some optional embodiments, the upper endpoint of the first leeward side contour line is G1, wherein a perpendicular line of G1 falls into the middle fin section of the fin.

[0017] In some optional embodiments, the first midpoint of the second leeward side contour line is D1, the first horizontal line p passing through the first midpoint D1 intersects the second windward side contour line at a second point D2, the perpendicular line of the first endpoint G1 intersects the first horizontal line p at a third point D3, the distance between D1 and D3 is L1, and the distance between D2 and D3 is L2, wherein 10mm≤L1≤55mm; and / or, 2mm≤L2≤40mm; and / or, L1≤L2.

[0018] In some optional embodiments, the length of the second leeward side contour line of the middle wing segment is L, wherein 0.1≤L1 / L≤1.5.

[0019] In some optional embodiments, 0.3≤L1 / L≤0.6; and / or, 0.1≤L2 / L≤1.5; and / or, 0.4≤L2 / L≤0.9.

[0020] In some embodiments, the heat exchanger includes fins and heat exchange tubes passing through the fins, wherein the fins are the aforementioned fins.

[0021] In some embodiments, the air duct unit includes a heat exchanger as described above.

[0022] In some optional embodiments, the duct air conditioner further includes: a volute, including a accommodating chamber and an air outlet, the accommodating chamber is used to install an indoor fan, the air outlet is connected to the outlet of the accommodating chamber, the heat exchanger is arranged in the air outlet, the midpoint of the longitudinal section of the outlet of the accommodating chamber is the reference point H, the second windward side contour line of the middle wing segment corresponds to the reference point H with an angle of c1, the first windward side contour line of the upper wing segment corresponds to the reference point H with an angle of c2, and the third windward side contour line of the lower wing segment corresponds to the reference point H with an angle of c3, wherein 6°≤c1≤50°; and / or, 0.3≤c2 / c1≤0.7; and / or, 0.5≤c3 / c1≤0.9; and / or, 0.6≤c1 / (c2+c3)≤1.

[0023] In some optional embodiments, the air outlet includes a first diffuser plate, the fin includes a windward side contour line, the first diffuser plate extends toward the windward side contour line, the intersection point of the extension direction of the first diffuser plate and the windward side contour line is T1, the length between T1 and the nearest endpoint of the windward side contour line is t1, and the total length of the windward side contour line is t, wherein 5%≤t1 / t≤30%.

[0024] In some optional embodiments, the air outlet includes a first air outlet and a second air outlet, the first air outlet is connected to the outlet of the accommodating cavity, and the cross-sectional area of ​​the gas flow of the first air outlet gradually increases along the air outlet direction, the second air outlet is connected to the outlet of the first air outlet, and is used to set a heat exchanger, and the cross-sectional area of ​​the gas flow of at least part of the second air outlet is greater than the maximum cross-sectional area of ​​the gas flow of the first air outlet, the first air outlet includes a first diffuser plate and a second diffuser plate, the second air outlet includes a third diffuser plate, a fourth diffuser plate, a fifth diffuser plate and a sixth diffuser plate, the third diffuser plate is connected to the first diffuser plate and extends upward, and the angle between the third diffuser plate and the extension direction of the first diffuser plate is The fourth diffuser plate is connected to the second diffuser plate and extends downward. The angle between the fourth diffuser plate and the second diffuser plate is The fifth diffuser plate is connected to the third diffuser plate and extends downward. The angle between the fifth diffuser plate and the third diffuser plate is The sixth diffuser plate is connected to the fourth diffuser plate and extends upward. The angle between the sixth diffuser plate and the fourth diffuser plate is in, and / or, and / or, and / or,

[0025] The fin, heat exchanger, and duct unit provided by the embodiments of the present disclosure can achieve the following technical effects:

[0026] The disclosed embodiments provide an overall curved fin, wherein the upper, middle, and lower fin segments all have straight side profiles. The angle between the first and second windward side profiles is the first plate segment angle α, and the angle between the second and third windward side profiles is the second plate segment angle β, where α is ≥ 100° and / or β is ≥ 100°. This allows the heat exchanger's fin shape to adapt to the uneven distribution of wind speed within the duct, improving the heat exchange efficiency of the heat exchanger.

[0027] The above general description and the following description are exemplary and explanatory only and are not intended to limit the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] One or more embodiments are exemplarily described by corresponding drawings. These exemplary descriptions and drawings do not limit the embodiments. Elements with the same reference numerals in the drawings are shown as similar elements. The drawings do not constitute a scale limitation. In addition,

[0029] Figure 1 is a schematic structural diagram of a fin provided by an embodiment of the present disclosure;

[0030] Figure 2 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0031] Figure 3 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0032] Figure 4 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0033] Figure 5 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0034] Figure 6 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0035] Figure 7 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0036] Figure 8 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0037] Figure 9 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0038] Figure 10 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0039] Figure 11 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0040] Figure 12 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0041] Figure 13 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0042] Figure 14 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0043] Figure 15 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0044] Figure 16 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0045] Figure 17 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0046] Figure 18is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0047] Figure 19 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0048] Figure 20 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0049] Figure 21 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0050] Figure 22 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0051] Figure 23 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0052] Figure 24 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0053] Figure 25 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0054] Figure 26 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0055] Figure 27 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0056] Figure 28 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0057] Figure 29 is a structural schematic diagram of another fin provided by an embodiment of the present disclosure;

[0058] Figure 30 is a structural diagram of an air-conditioning indoor unit provided by an embodiment of the present disclosure;

[0059] Figure 31 is a structural diagram of another air-conditioning indoor unit provided by an embodiment of the present disclosure;

[0060] Figure 32 yes Figure 31 Enlarged view of selected part;

[0061] Figure 33 It is the velocity distribution cloud diagram of the heat exchanger;

[0062] Figure 34 This is the velocity distribution cloud diagram of the heat exchanger with C-type fins;

[0063] Figure 35 This is a velocity distribution cloud diagram of a heat exchanger with straight-edge fins provided by an embodiment of the present disclosure;

[0064] Figure 36 This is the pressure distribution cloud diagram of the heat exchanger with C-type fins;

[0065] Figure 37 This is a pressure distribution cloud diagram of a heat exchanger with straight-edge fins provided by an embodiment of the present disclosure;

[0066] Figure 38 is a structural diagram of an air conditioner provided by an embodiment of the present disclosure;

[0067] Figure 39 is a schematic diagram of the opening angles corresponding to each windward side contour line provided by an embodiment of the present disclosure;

[0068] Figure 40 Schematic diagram of the structure of the volute provided in an embodiment of the present disclosure;

[0069] Figure 41 Schematic diagrams of the structure of the fins provided in the embodiments of the present disclosure, wherein (a) is a schematic diagram of the windward side contour line, and (b) is a schematic diagram of the heat transfer unit on each fin segment;

[0070] Figure 42 is a schematic diagram of characteristic parameters of the bridge plate structure provided by an embodiment of the present disclosure;

[0071] Figure 43 is a schematic diagram of characteristic parameters of the shutter structure provided by an embodiment of the present disclosure;

[0072] Figure 44 is a schematic diagram of characteristic parameters of the shutter structure provided by an embodiment of the present disclosure;

[0073] Figure 45 is a schematic diagram of a drag coefficient of each wing segment provided by an embodiment of the present disclosure;

[0074] Figure 46 It is a schematic diagram of another drag coefficient of each wing segment provided in an embodiment of the present disclosure, wherein (a) is a schematic diagram of the drag coefficient corresponding to the two drag areas on the upper wing segment, and (b) is a schematic diagram of the drag coefficient corresponding to the two drag areas on the lower wing segment.

[0075] Reference numerals:

[0076] 1: upper wing segment; 11: first side contour line; 111: first leeward side contour line; 112: first windward side contour line; 101: first upper heat exchange hole; 102: second upper heat exchange hole; 103: third upper heat exchange hole; 104: windward side edge; 105: leeward side edge;

[0077] 2: middle wing segment; 21: second side contour line; 211: second leeward side contour line; 212: second windward side contour line; 201: first middle heat exchange hole; 202: second middle heat exchange hole; 203: third middle heat exchange hole;

[0078] 3: lower wing segment; 31: third side contour line; 311: third leeward side contour line; 312:

[0079] third windward side contour line;

[0080] 4: Indoor unit housing; 41: Mounting cavity; 42: Air inlet; 43: Air outlet; 44: First air outlet; 45: Second air outlet; 46: Air outlet; 47: Fixing structure; 411: First diffuser; 412: Second diffuser; 413: Third diffuser; 414: Fourth diffuser; 415: Fifth diffuser; 416: Sixth diffuser; 417: Accommodating chamber; 4171: Exit of the accommodating chamber; 418: Axis of the volute; 441: Exit of the first air outlet; 451: Exit of the second air outlet;

[0081] 5: Indoor fan;

[0082] 6: Heat exchanger; 61: First heat exchange tube hole group; 611: First heat exchange tube hole; 62: Second heat exchange tube hole group; 621: Second heat exchange tube hole; 63: Third heat exchange tube hole group; 631: Third heat exchange tube hole; 64: Fin; 641: Windward side contour line; 642: Leeward side contour line; 65: Bridge structure; 651: Bridge top wall; 652: Bridge side wall; 66: Shutter structure; 661: Window top wall; 662: Window side wall. DETAILED DESCRIPTION

[0083] In order to be able to understand the features and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure is described in detail below in conjunction with the accompanying drawings. The accompanying drawings are for reference only and are not used to limit the embodiments of the present disclosure. In the following technical description, for the sake of convenience of explanation, a full understanding of the disclosed embodiments is provided through multiple details. However, one or more embodiments can still be implemented without these details. In other cases, to simplify the drawings, well-known structures and devices can be simplified for display.

[0084] In the description and claims of the embodiments of the present disclosure, as well as in the accompanying drawings, the terms "first," "second," and the like are used to distinguish similar items and are not necessarily used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate to describe the embodiments of the present disclosure herein. In addition, the terms "including," "having," and any variations thereof are intended to cover non-exclusive inclusions.

[0085] In the embodiments of the present disclosure, the terms "upper", "lower", "inside", "middle", "outside", "front", "back" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings. These terms are mainly intended to better describe the embodiments of the present disclosure and their embodiments, and are not intended to limit the indicated devices, elements or components to having a specific direction, or to be constructed and operated in a specific direction. Moreover, in addition to being used to indicate directions or positional relationships, some of the above terms may also be used to indicate other meanings. For example, the term "upper" may also be used to indicate a certain dependency or connection relationship in certain circumstances. For those of ordinary skill in the art, the specific meanings of these terms in the embodiments of the present disclosure can be understood according to specific circumstances.

[0086] Furthermore, the terms "disposed," "connected," and "fixed" should be interpreted broadly. For example, "connected" can mean a fixed connection, a removable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection, an indirect connection through an intermediary, or an internal connection between two devices, elements, or components. Those skilled in the art will understand the specific meanings of these terms in the embodiments of this disclosure based on the specific circumstances.

[0087] Unless otherwise stated, the term "plurality" means two or more.

[0088] In the embodiment of the present disclosure, the character " / " indicates that the preceding and following objects are in an "or" relationship. For example, A / B means: A or B.

[0089] The term "and / or" describes an association between objects, indicating that three relationships can exist. For example, A and / or B means: A or B, or A and B.

[0090] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present disclosure can be combined with each other.

[0091] An embodiment of the present disclosure provides a heat exchanger with curved fins. Optionally, the heat exchanger with curved fins may also be referred to as a heat exchanger.

[0092] Optionally, a heat exchanger with arc-shaped fins includes fins and heat exchange tubes passing through the fins, and the fins include an upper fin section 1, a middle fin section 2, and a lower fin section 3. The upper fin section 1 includes a straight first side contour line 11 that is parallel to each other and has a spacing of W1; the middle fin section 2 is arranged at the lower part of the upper fin section 1 and is bent and connected to the upper fin section 1, and the middle fin section 2 includes a straight second side contour line 21 that is parallel to each other and has a spacing of W2; the lower fin section 3 is arranged at the lower part of the middle fin section 2 and is bent and connected to the middle fin section 2, and the lower fin section 3 includes a straight third side contour line 31 that is parallel to each other and has a spacing of W3, wherein W2≥W1, and W2>W3. As Figure 1 and Figure 2 shown.

[0093] It is understood that the upper fin segment 1, the middle fin segment 2 and the lower fin segment 3 are arranged in the upper, middle and lower positions when the fin is in use. Optionally, the upper fin segment 1, the middle fin segment 2 and the lower fin segment 3 of the fin are integrally formed.

[0094] The spacing W1 between the first side contour lines 11 can be understood as the width of the upper fin segment 1. Similarly, the spacing W2 between the second side contour lines 21 is the width of the middle fin segment 2, and the spacing W3 between the third side contour lines 31 is the width of the lower fin segment 3. In the disclosed embodiment, W2 ≥ W1, that is, the width of the middle fin segment 2 is greater than or equal to the width of the upper fin segment 1; and W2 > W3, that is, the width of the middle fin segment 2 is greater than the width of the lower fin segment 3. This allows the fin shape to match the uneven distribution of wind speed generated by the indoor fan in the air duct, thereby improving the heat exchange efficiency of the heat exchanger.

[0095] Existing I-shaped fin heat exchangers exhibit high wind speeds in the upper portion and low wind speeds in the lower portion during heat exchange, resulting in uneven wind speed distribution. Compared to existing I-shaped fin heat exchangers, the straight-sided fin heat exchanger provided in the disclosed embodiments effectively directs the airflow from the high-speed central region to both the upper and lower portions, resulting in uniform wind speed distribution overall. This uniform wind field distribution improves the uniformity of the heat exchange field and enhances the overall heat exchange performance of the heat exchanger.

[0096] Fins with arc-shaped side contours can be called C-type fins. Existing C-type fin heat exchangers have a characteristic of having a large flow stagnation zone in the middle on the leeward side, and the outlet wind speed distribution is uneven. Compared with the existing C-type fin heat exchange, the straight-edge fin heat exchanger provided in the embodiment of the present disclosure effectively guides the incoming flow in the middle high wind speed zone to the upper and lower parts, significantly reduces the flow stagnation zone in the middle on the leeward side, and the outlet wind speed distribution is more uniform. Figure 34 From the velocity distribution cloud diagram shown, it can be seen that the heat exchanger with C-type fins has a large flow stagnation area in the middle of the leeward side. Figure 35 For Figure 34Velocity distribution cloud diagram of the straight-edge fin heat exchanger measured at the same wind speed. Figure 35 It can be seen that the flow stagnation zone on the leeward side of the heat exchanger with straight-edge fins is significantly reduced.

[0097] Figure 36 This is the pressure distribution cloud diagram of the heat exchanger with C-type fins. Figure 37 This is a pressure distribution contour diagram of a heat exchanger with straight-sided fins according to an embodiment of the present disclosure. It can be measured that the pressure drop between the windward and leeward sides of a conventional C-shaped heat exchanger is 278 Pa, while the pressure drop between the windward and leeward sides of the heat exchanger with straight-sided fins according to an embodiment of the present disclosure is 271 Pa. It can be seen that the pressure drop of the conventional C-shaped heat exchanger is larger, while the pressure drop of the heat exchanger with straight-sided fins according to an embodiment of the present disclosure is reduced by 2.5% compared to the C-shaped heat exchanger.

[0098] Optionally, 1≤W2 / W1≤2; and / or, 1≤W2 / W3≤2.

[0099] Optionally, 1 < W2 / W1 ≤ 2, and 1 < W2 / W3 ≤ 2. In the disclosed embodiment, the width of the middle wing segment 2 is relatively large, greater than the widths of the upper wing segment 1 and the lower wing segment 3. This improves the effectiveness of the middle wing segment 2 in guiding airflow to the upper wing segment 1 and the lower wing segment 3, respectively, and improves the uniformity of the overall wind speed distribution of the fins.

[0100] Optionally, the first side contour line 11 includes a first leeward side contour line 111 and a first windward side contour line 112, the second side contour line 21 includes a second leeward side contour line 211 and a second windward side contour line 212, and the third side contour line 31 includes a third leeward side contour line 311 and a third windward side contour line 312. The midpoint of the line connecting the upper end point of the first windward side contour line 112 and the lower end point of the third windward side contour line 312 is set as the reference point F, the first angle of the second leeward side contour line 211 corresponding to the reference point F is d1, the second angle of the first leeward side contour line 111 corresponding to the reference point F is d2, and the third angle of the third leeward side contour line 311 corresponding to the reference point F is d3, wherein 5°≤d1≤160°; and / or, 10°≤d2≤100°; and / or, 15°≤d3≤100°. Figure 7 and Figure 8 shown.

[0101] The first leeward side contour line 111, the second leeward side contour line 211 and the third leeward side contour line 311 are connected in sequence to obtain the leeward side contour line of the fin; similarly, the first windward side contour line 112, the second windward side contour line 212 and the third windward side contour line 312 are connected in sequence to obtain the windward side contour line of the fin.

[0102] The reference point F is the midpoint of a line connecting the upper end point G3 of the first windward side contour line 112 and the lower end point G4 of the third windward side contour line 312 .

[0103] The first angle d1 is the angle between two lines connecting the reference point F and the two endpoints of the second leeward contour line 211. When the line connecting the second leeward contour line 211 and the first leeward contour line 111 is an arc, and the line connecting the second leeward contour line 211 and the third leeward contour line 311 is an arc, then the extension of the second leeward contour line 211 and the extension of the first leeward contour line 111 intersect at a first intersection point, and the extension of the second leeward contour line 211 and the extension of the third leeward contour line 311 intersect at a second intersection point. The angle between the two lines connecting the reference point F and the first intersection point and the second intersection point is taken as the first angle d1.

[0104] Similarly, the second angle d2 is the angle between two lines connecting the reference point F and the two endpoints of the first leeward contour line 111. When the line connecting the second leeward contour line 211 and the first leeward contour line 111 is an arc, the angle between the two lines connecting the reference point F and the first intersection point and the upper endpoint of the first leeward contour line 111 is taken as the second angle d2.

[0105] Similarly, the third angle d3 is the angle between two lines connecting the reference point F and the two endpoints of the third leeward contour line 311. When the angle between the second leeward contour line 211 and the third leeward contour line 311 is an arc, the angle between the reference point F and two lines connecting the second intersection point and the lower endpoint of the third leeward contour line 311 is taken as the third angle d3.

[0106] Optionally, 30°≤d1≤160°; and / or, 15°≤d2≤100°; and / or, 15°≤d3≤100°.

[0107] Optionally, when the shape of the fin is symmetrical in the vertical direction, the first angle d1 of the second leeward side contour line 211 corresponding to the reference point F can be appropriately reduced, for example, 5°≤d1≤70°. In this case, the length of the second leeward side contour line 211 is reduced, which is conducive to improving the effect of the middle wing segment 2 guiding the airflow to the upper wing segment 1 and the lower wing segment 3 respectively. Optionally, 10°≤d1≤40°, or 25°≤d1≤35°. Optionally, compared with the first angle d1, the second angle d2 of the first leeward side contour line 111 corresponding to the reference point F can be appropriately increased, for example, 15°≤d2≤85°. In this case, the corresponding increase in the length of the first leeward side contour line 111 is conducive to improving the upper wing segment 1 receiving the airflow diverted from the middle wing segment 2. Optionally, 35°≤d2≤65°, or 40°≤d2≤55°. Similarly, compared with the first angle d1, the third angle d3 of the third leeward side contour line 311 corresponding to the reference point F can be appropriately increased, for example, 25°≤d3≤95°. At this time, the corresponding increase in the length of the third leeward side contour line 311 is conducive to improving the lower wing segment 3 receiving the airflow diverted from the middle wing segment 2. Optionally, 45°≤d3≤75°, or, 40°≤d3≤60°. Optionally, the length of the third leeward side contour line 311 is slightly larger than the length of the first leeward side contour line 111. Optionally, the difference between d3 and d1 is greater than 5° and less than or equal to 10°. As Figure 7 shown.

[0108] Optionally, when the shape of the fin is symmetrical up and down, 0.4≤d1 / d2≤0.6; and / or, 0.3≤d1 / d3≤0.5. When the length of the second leeward side contour line 211 decreases, the first angle d1 corresponding to the second leeward side contour line 211 also decreases accordingly. In the embodiment of the present disclosure, d1 / d2 can be 0.4, 0.5 or 0.6, so that the first angle d1 is smaller than the second angle d2, and correspondingly, the length of the second leeward side contour line 211 is smaller than the length of the first leeward side contour line 111, thereby improving the wind-guiding and flow-guiding effect of the middle wing segment 2 to the upper wing segment 1; similarly, d1 / d3 can be 0.3, 0.4 or 0.5, so that the first angle d1 is smaller than the third angle d3, and correspondingly, the length of the second leeward side contour line 211 is smaller than the length of the third leeward side contour line 311, thereby improving the wind-guiding and flow-guiding effect of the middle wing segment 2 to the lower wing segment 3. Optionally, d1 / d2>d1 / d3.

[0109] The shape of the fin is symmetrical in the upper and lower parts, which can be understood as follows: the angle s1 between the first leeward side contour line 111 and the horizontal line, the angle s3 between the third leeward side contour line 311 and the horizontal line, s1 = s3, the angle s2 between the first windward side contour line 112 and the horizontal line, the angle s4 between the third windward side contour line 312 and the horizontal line, s2 = s4. At this time, the curvature of the upper wing segment 1 is the same as that of the lower wing segment 3. Figure 3 shown.

[0110] Optionally, 115°<d1+d2+d3<145°, optionally, 120°<d1+d2+d3<130°.

[0111] Optionally, when the shape of the fin is asymmetric, the angle s1 between the first leeward side contour line 111 and the horizontal line is not equal to the angle s3 between the third leeward side contour line 311 and the horizontal line. Optionally, s1>s3, and the length of the first leeward side contour line 111 is less than the length of the third leeward side contour line 311. Figure 4 shown.

[0112] Optionally, when the shape of the fin is asymmetrical, 10°≤d1≤80°, which is beneficial to improving the effect of the middle wing segment 2 guiding the airflow to the upper wing segment 1. Optionally, 20°≤d1≤50°, or 35°≤d1≤40°. Optionally, compared with the first angle d1, the second angle d2 of the first leeward contour line 111 corresponding to the reference point F can be appropriately reduced, for example, 5°≤d2≤75°, which is beneficial to improving the upper wing segment 1 receiving the airflow diverted from the middle wing segment 2. Optionally, 12°≤d2≤42°, or 25°≤d2≤35°. The third angle d3 of the third leeward contour line 311 corresponding to the reference point F can be appropriately increased, for example, 20°≤d3≤100°. At this time, the length of the third leeward contour line 311 is relatively increased, which is beneficial to improving the lower wing segment 3 receiving the airflow diverted from the middle wing segment 2. Optionally, 40°≤d3≤80°, or 60°≤d3≤70°. Optionally, the difference between d3 and d1 is greater than 10° and less than or equal to 25°. Figure 8 shown.

[0113] Optionally, when the fin shape is asymmetric, 1.2 ≤ d1 / d2 ≤ 1.4, and / or 0.45 ≤ d1 / d3 ≤ 0.7. The second angle d2 corresponding to the first leeward contour line 111 is relatively small relative to the first angle d1 corresponding to the second leeward contour line 211. This helps improve the wind diversion effect of the middle fin segment 2 on the upper fin segment 1 in the asymmetric fin. Optionally, d1 / d2 can be 1.2, 1.3, or 1.4. The third angle d3 corresponding to the third leeward contour line 311 is relatively large relative to the first angle d1 corresponding to the second leeward contour line 211. This helps improve the wind diversion effect of the middle fin segment 2 on the lower fin segment 3 in the irregular fin. Optionally, d1 / d3 can be 0.45, 0.5, 0.55, 0.6, 0.65, or 0.7.

[0114] Optionally, the angle between the first windward side contour line 112 and the second windward side contour line 212 is a first panel segment angle α, and the angle between the second windward side contour line 212 and the third windward side contour line 312 is a second panel segment angle β, wherein the first panel segment angle α is greater than or equal to 100°; and / or the second panel segment angle β is greater than or equal to 100°. Figure 5 and Figure 6 shown.

[0115] It is understood that when the first windward side contour line 112 and the second windward side contour line 212 directly intersect, the angle formed by the intersection of these two side contour lines is the first panel segment angle α; when the first windward side contour line 112 and the second windward side contour line 212 are connected by an arc line and do not directly intersect, the angle formed by the intersection of the extended line of the first windward side contour line 112 and the extended line of the second windward side contour line 212 is the first panel segment angle α. Similarly, when the second windward side contour line 212 and the third windward side contour line 312 directly intersect, the angle formed by the intersection of these two side contour lines is the second panel segment angle β; when the second windward side contour line 212 and the third windward side contour line 312 are connected by an arc line and do not directly intersect, the angle formed by the intersection of the extended line of the second windward side contour line 212 and the extended line of the third windward side contour line 312 is the second panel segment angle β.

[0116] Optionally, 100°≤α≤170°; and / or, 100°≤β≤170°.

[0117] Optionally, when the shape of the fin is symmetrical up and down, 120°≤α≤135°, thus improving the wind diversion effect of the middle fin segment 2 to the upper fin segment 1, optionally, α can be 120°, 125°, 128°, 130° or 135°; similarly, 120°≤β≤135°, thus improving the wind diversion effect of the middle fin segment 2 to the lower fin segment 3, optionally, β can be 120°, 125°, 128°, 130° or 135°. Optionally, α=β. Figure 5 shown.

[0118] Optionally, when the fins are asymmetrical up and down, 127°≤α≤178°; and / or, 95°≤β≤150°; optionally, 140°≤α≤170°; and / or, 110°≤β≤143°; optionally, 150°≤α≤160°, thus improving the wind distribution effect of the middle wing segment 2 to the upper wing segment 1, optionally, α can be 150°, 155°, 157° or 160°; similarly, 120°≤β≤135°, thus improving the wind distribution effect of the middle wing segment 2 to the lower wing segment 3, optionally, β can be 120°, 125°, 128°, 130° or 135°. Optionally, α>β; optionally, the difference between α and β is greater than 20° and less than or equal to 30°. As Figure 6 shown.

[0119] Optionally, the fourth angle of the second windward side contour line 212 corresponding to the reference point F is e1, the fifth angle of the first windward side contour line 112 corresponding to the reference point F is e2, and the sixth angle of the third windward side contour line 312 corresponding to the reference point F is e3, wherein 30°≤e1≤160°; and / or, 15°≤e2≤100°; and / or, 15°≤e3≤100°. Figure 9 and Figure 10 shown.

[0120] It is understood that the fourth angle e1 is the angle between two lines connecting the reference point F and the two endpoints of the second windward side contour line 212. When the line connecting the second windward side contour line 212 and the first windward side contour line 112 is an arc, and the line connecting the second windward side contour line 212 and the third windward side contour line 312 is an arc, then the extension line of the second windward side contour line 212 and the extension line of the first windward side contour line 112 intersect at a third intersection point, and then the extension line of the second windward side contour line 212 and the extension line of the third windward side contour line 312 intersect at a fourth intersection point. The angle between the two lines connecting the reference point F and the third and fourth intersection points is taken as the fourth angle e1.

[0121] Similarly, the fifth angle e2 is the angle between the two lines connecting the reference point F and the two endpoints of the first windward side contour line 112. When the line connecting the second windward side contour line 212 and the first windward side contour line 112 is an arc, the angle between the two lines connecting the reference point F and the third intersection point and the upper endpoint of the first windward side contour line 112 is taken as the fifth angle e2.

[0122] Similarly, the sixth angle e3 is the angle between the two connecting lines obtained by the reference point F and the two endpoints of the third windward side contour line 312. When the line between the second windward side contour line 212 and the third windward side contour line 312 is an arc, the angle between the two connecting lines obtained by the reference point F and the fourth intersection point and the lower endpoint of the third windward side contour line 312 is taken as the sixth angle e3.

[0123] Optionally, when the shape of the fin is symmetrical up and down, the fourth angle e1 of the second windward side contour line 212 corresponding to the reference point F can be appropriately reduced, for example, 15°≤e1≤80°. In this case, the length of the second windward side contour line 212 is correspondingly reduced, which is beneficial to improving the effect of the middle wing segment 2 guiding the airflow to the upper wing segment 1 and the lower wing segment 3 respectively. Optionally, 27°≤e1≤67°. Optionally, compared with the fourth angle e1, the fifth angle e2 of the first windward side contour line 112 corresponding to the reference point F can be appropriately increased, for example, 35°≤e2≤85°, or 45°≤e2≤75°. In this case, the length of the first windward side contour line 112 is correspondingly increased, which is beneficial to improving the upper wing segment 1 receiving the airflow diverted from the middle wing segment 2. Optionally, 60°≤e2≤70°. Similarly, compared with the fourth angle e1, the sixth angle e3 of the third windward side contour line 312 corresponding to the reference point F can be appropriately increased, for example, 50°≤e3≤100°. At this time, the relative increase in the length of the third windward side contour line 312 is beneficial to improving the lower wing section 3 receiving the airflow diverted from the middle wing section 2. Optionally, 62°≤e3≤92°, or 62°≤e3≤70°. Optionally, the length of the third windward side contour line 312 is slightly larger than the length of the first windward side contour line 112. Optionally, the difference between e3 and e2 is greater than 0.5° and less than or equal to 5°. As Figure 9 shown.

[0124] Optionally, when the shape of the fin is vertically symmetrical, 0.3≤e1 / e2≤1; and / or 0.25≤e1 / e3≤0.85. When the length of the second windward side contour line 212 is relatively small, the fourth angle e1 corresponding to the second windward side contour line 212 is also relatively small. Optionally, 0.6≤e1 / e2≤0.8, for example, e1 / e2 can be 0.6, 0.7, or 0.8, so that the fourth angle e1 is smaller than the fifth angle e2. Correspondingly, the length of the second windward side contour line 212 is smaller than the length of the first windward side contour line 112, thereby improving the wind-inducing and flow-guiding effect of the middle wing segment 2 on the upper wing segment 1. Optionally, 0.45≤e1 / e3≤0.65, for example, e1 / e3 can be 0.45, 0.55, or 0.65, so that the fourth angle e1 is smaller than the sixth angle e3. Correspondingly, the length of the second windward side contour line 212 is smaller than the length of the third windward side contour line 312, thereby improving the wind-inducing and flow-guiding effect of the middle wing segment 2 on the lower wing segment 3. Optionally, e1 / e2>e1 / e3.

[0125] Optionally, when the shape of the fin is asymmetrical, s2≠s4, optionally, s2>s4, and the length of the first windward side contour line 112 is less than the length of the third windward side contour line 312, e2≠e3. Optionally, 30°≤e1≤100°, which is conducive to improving the effect of the middle wing section 2 guiding the airflow to the upper wing section 1. Optionally, 50°≤e1≤80°, or 70°≤e1≤80°. Optionally, compared with the fourth angle e1, the fifth angle e2 of the first windward side contour line 112 corresponding to the reference point F can be appropriately reduced, for example, 5°≤e2≤70°, which is conducive to improving the upper wing section 1 receiving the airflow diverted from the middle wing section 2. Optionally, 18°≤e2≤48°, or 30°≤e2≤40°. The sixth angle e3 of the third windward side contour line 312 corresponding to the reference point F can be appropriately increased, for example, 45°≤e3≤100°. At this time, the relative increase in the length of the third windward side contour line 312 is conducive to improving the lower wing section 3 receiving the airflow diverted from the middle wing section 2. Optionally, 65°≤e3≤95°, or 66°≤e3≤75°. Optionally, the difference between e3 and e1 is greater than or equal to 0° and less than or equal to 5°. Figure 10 shown.

[0126] Optionally, when the shape of the fin is asymmetric, 1.7≤e1 / e2≤2.3; and / or, 0.5≤e1 / e3≤1.2. Relative to the fourth angle e1 corresponding to the second windward side contour line 212, the fifth angle e2 corresponding to the first windward side contour line 112 is relatively small. In this way, in the irregular fin, it helps to improve the wind-guiding effect of the middle fin segment 2 to the upper fin segment 1. Optionally, e1 / e2 can be 1.7, 1.8, 1.9, 2.0, 2.2 or 2.3. Optionally, 0.5≤e1 / e3<1. Relative to the fourth angle e1 corresponding to the second windward side contour line 212, the sixth angle e3 corresponding to the third windward side contour line 312 is relatively large. In this way, in the irregular fin, it helps to improve the wind-guiding effect of the middle fin segment 2 to the lower wing segment 3. Alternatively, e1 / e3 may be 0.5, 0.6, 0.7, 0.8, 0.9 or 0.95. Alternatively, e1=e3.

[0127] Optionally, L is the length of the second windward side contour line 212, and L0 is the length of the second leeward side contour line 211, wherein 15mm≤L≤75mm, and / or 15mm≤L0≤75mm; further, 30mm≤L≤60mm, and / or 30mm≤L0≤60mm. Figure 11 and Figure 12 Optionally, L may be 30 mm, 40 mm, 50 mm, or 60 mm; and optionally, L0 may be 30 mm, 40 mm, 50 mm, or 60 mm.

[0128] Optionally, L3 is the length of the first windward side contour line 112, and L4 is the length of the first leeward side contour line 111, wherein 40 mm ≤ L3 ≤ 100 mm, and / or 50 mm ≤ L4 ≤ 110 mm; further, 55 mm ≤ L3 ≤ 85 mm, and / or 65 mm ≤ L4 ≤ 95 mm. Optionally, L3 may be 55 mm, 65 mm, 75 mm, or 85 mm; and optionally, L4 may be 65 mm, 75 mm, 85 mm, or 95 mm.

[0129] Optionally, L5 is the length of the third windward side contour line 312, and L6 is the length of the third leeward side contour line 311, wherein 55 mm ≤ L5 ≤ 115 mm, and / or 70 mm ≤ L6 ≤ 130 mm; further, 70 mm ≤ L5 ≤ 100 mm, and / or 85 mm ≤ L6 ≤ 115 mm. Optionally, L5 can be 70 mm, 80 mm, 90 mm, or 100 mm; and optionally, L6 can be 85 mm, 95 mm, 105 mm, or 115 mm.

[0130] Optionally, when the fin is an irregular fin, 32mm≤L≤92mm, and / or 32mm≤L0≤92mm; further, 47mm≤L≤77mm, and / or 47mm≤L0≤77mm. Optionally, 14mm≤L3≤74mm, and / or 22mm≤L4≤82mm; further, 37mm≤L3≤67mm, and / or 29mm≤L4≤59mm. Optionally, 52mm≤L5≤112mm, and / or 66mm≤L6≤126mm; further, 67mm≤L5≤97mm, and / or 81mm≤L6≤101mm. Figure 12 Alternatively, L may be 47 mm, 57 mm, 67 mm, or 77 mm; L0 may be 47 mm, 57 mm, 67 mm, or 77 mm; L3 may be 37 mm, 47 mm, 57 mm, or 67 mm; L4 may be 29 mm, 39 mm, 49 mm, or 59 mm; L5 may be 67 mm, 77 mm, 87 mm, or 97 mm; and L6 may be 81 mm, 91 mm, or 101 mm.

[0131] Optionally, 1.3≤W2 / W1≤1.7; and / or, 1.3≤W2 / W3≤1.7. Optionally, W2 / W1 may be 1.3, 1.4, 1.5, 1.6 or 1.7; similarly, W2 / W3 may be 1.3, 1.4, 1.5, 1.6 or 1.7.

[0132] Optionally, when the fin is an irregular fin, 0.8 ≤ W2 / W1 ≤ 1.5; further, 1 ≤ W2 / W1 ≤ 1.3. Optionally, 1.2 ≤ W2 / W3 ≤ 2; further, 1.5 ≤ W2 / W3 ≤ 1.9. Optionally, W2 / W1 can be 1, 1.1, 1.2, or 1.3; and W2 / W3 can be 1.5, 1.6, 1.7, 1.8, or 1.9.

[0133] Optionally, 22 mm ≤ W2 ≤ 66 mm; further, 33 mm ≤ W2 ≤ 55 mm. Optionally, W2 may be 33 mm, 44 mm, or 55 mm.

[0134] Optionally, 14 mm ≤ W1 ≤ 53 mm; further, 22 mm ≤ W1 ≤ 44 mm. Optionally, W1 may be 22 mm, 33 mm, or 44 mm.

[0135] Optionally, 14 mm ≤ W3 ≤ 53 mm; further, 22 mm ≤ W3 ≤ 44 mm. Optionally, W3 may be 22 mm, 33 mm, or 44 mm.

[0136] Optionally, when the fin is an irregular fin, 20 mm ≤ W2 ≤ 70 mm; further, 33 mm ≤ W2 ≤ 60 mm. Optionally, 20 mm ≤ W1 ≤ 60 mm; further, 25 mm ≤ W1 ≤ 55 mm. Optionally, 15 mm ≤ W3 ≤ 40 mm; further, 10 mm ≤ W3 ≤ 35 mm. Optionally, W2 can be 33 mm, 40 mm, 50 mm, or 60 mm; W1 can be 25 mm, 35 mm, 45 mm, or 55 mm; and W3 can be 10 mm, 20 mm, 30 mm, or 35 mm.

[0137] Optionally, the middle fin section 2 is provided with a plurality of first heat exchange tube holes for passing heat exchange tubes. The plurality of first heat exchange tube holes are arranged in "columns" along the second windward-side contour line 212 or the second leeward-side contour line 211. In the same column, the spacing between two adjacent first heat exchange tube holes is b1; and the spacing between two adjacent first heat exchange tube holes in two adjacent columns is m1.

[0138] Similarly, the upper fin section 1 is provided with a plurality of second heat exchange tube holes for passing heat exchange tubes. These second heat exchange tube holes are arranged in "columns" along the first windward-side contour line 112 or the first leeward-side contour line 111. The spacing between two adjacent second heat exchange tube holes in the same column is b2; the spacing between two adjacent second heat exchange tube holes in two adjacent columns is m2.

[0139] Similarly, the lower wing section 3 is provided with a plurality of third heat exchange tube holes for passing heat exchange tubes. The plurality of third heat exchange tube holes form third heat exchange tube holes arranged in "columns" along the third windward side contour line 312 or the third leeward side contour line 311. In the same column, the spacing between two adjacent third heat exchange tube holes is b3; the spacing between two adjacent third heat exchange tube holes in two adjacent columns is m3. Figure 13 and Figure 14 shown.

[0140] Optionally, b1 / b2=1-1.4; b1 / b3=1-1.4. Optionally, b1 / b2 can be 1, 1.1, 1.2, 1.3 or 1.4; similarly, b1 / b3 can be 1, 1.1, 1.2, 1.3 or 1.4.

[0141] Optionally, when the fin is an irregular fin, b1 / b2=0.8-1.6; optionally, b1 / b2=0.9-1.3.

[0142] b1 / b3=0.9-1.5; alternatively, b1 / b3=1-1.4. Alternatively, b1 / b2 may be 0.9, 1, 1.1, 1.2 or 1.3; b1 / b3 may be 1, 1.1, 1.2, 1.3 or 1.4.

[0143] Alternatively, m1 / m2 = 0.8-1.2; further, m1 / m2 = 0.9-1.1. Alternatively, m1 / m3 = 0.8-1.2; further, m1 / m3 = 0.9-1.1. Alternatively, m1 / m2 may be 0.9, 1, or 1.1; similarly, m1 / m3 may be 0.9, 1, or 1.1.

[0144] Optionally, when the fins are irregular fins, m1 / m2 = 0.8-1.5; further, m1 / m2 = 0.9-1.3. Optionally, m1 / m3 = 0.8-1.6; further, m1 / m3 = 0.9-1.4. Optionally, m1 / m2 can be 0.9, 1, 1.1, 1.2, or 1.3; and m1 / m3 can be 0.9, 1, 1.1, 1.2, 1.3, or 1.4.

[0145] It can be understood that the first leeward side contour line 111 can also be called the upper leeward edge; the first windward side contour line 112 can also be called the upper windward edge; the second leeward side contour line 211 can also be called the middle leeward edge; the second windward side contour line 212 can also be called the middle windward edge; the third leeward side contour line 311 can also be called the lower leeward edge; the third windward side contour line 312 can also be called the lower windward edge.

[0146] Optionally, a heat exchanger with curved fins includes fins and heat exchange tubes extending through the fins, wherein the fins include an upper fin segment 1, a middle fin segment 2, and a lower fin segment 3. The upper fin segment 1 includes a first endpoint G1 located on the leeward side; the middle fin segment 2 is disposed below the upper fin segment 1, and a first connection point is provided between the upper fin segment 1 and the middle fin segment 2; the lower fin segment 3 is disposed below the middle fin segment 2, and a second connection point is provided between the middle fin segment 2 and the lower fin segment 3. A perpendicular to the first endpoint G1 falls through the middle fin segment 2 of the fin.

[0147] The fins of the heat exchanger include at least an upper fin section 1, a middle fin section 2 and a lower fin section 3, which are connected in sequence from top to bottom. Optionally, the upper fin section 1, the middle fin section 2 and the lower fin section 3 can be prepared in an integrally formed form.

[0148] The heat exchange tubes of the heat exchanger are passed through the fins. Multiple heat exchange tubes can be connected to form one heat exchange branch, or two or more heat exchange branches.

[0149] The upper wing segment 1 includes a first endpoint G1 located on the leeward side. The first endpoint G1 can be understood as an endpoint located at the uppermost portion of the upper leeward edge of the upper wing segment 1. Figure 15 shown.

[0150] The vertical line of the first endpoint G1 falls into the middle fin section 2 of the fin. It can be understood that the vertical line obtained by taking the first endpoint G1 as the vertical line will fall into the middle fin section 2 of the fin, such as Figure 15 shown.

[0151] Optionally, the middle wing segment 2 includes a middle leeward edge located on the leeward side and a middle windward edge located on the windward side, the first midpoint of the middle leeward edge is D1, the first horizontal line p passing through the first midpoint D1 intersects with the middle windward edge at a second point D2, and the perpendicular line of the first endpoint G1 intersects with the first horizontal line p at a third point D3, wherein the distance between D1 and D3 is L1, and 10mm≤L1≤55mm.

[0152] like Figure 15 As shown, the middle wing section 2 of the fin includes a middle leeward edge located on the leeward side and a middle windward edge located on the windward side. The midpoint of the middle leeward edge is a first midpoint D1, and a first horizontal line p passing through the first midpoint D1 intersects the middle windward edge at D2. Optionally, D2 is the midpoint of the middle windward edge.

[0153] The distance between D1 and D3 is L1, and optionally, 10 mm ≤ L1 ≤ 55 mm. Alternatively, L1 can be 10 mm, 20 mm, 30 mm, 40 mm, 50 mm, or 55 mm. In the disclosed embodiment, a perpendicular line from the first endpoint G1 intersects the first horizontal line p at a third point D3, and a certain distance exists between D3 and D1. This improves the matching degree between the fin shape and the uneven wind speed in the air duct, thereby improving the heat exchange efficiency of the heat exchanger.

[0154] Optionally, the distance between D2 and D3 is L2, and 2mm≤L2≤40mm.

[0155] The distance between D2 and D3 is L2. Optionally, 2mm≤L2≤40mm. Optionally, the value of L2 can be 2mm, 5mm, 10mm, 20mm, 30mm, or 40mm. In the disclosed embodiment, a certain distance between D3 and D2 improves the matching degree between the fin shape and the uneven wind speed in the air duct, thereby improving the heat exchange efficiency of the heat exchanger.

[0156] Optionally, L1≤L2.

[0157] For example, L1 is 30 mm and L2 is 35 mm; or, L1 is 30 mm and L2 is 40 mm.

[0158] Optionally, the length of the middle leeward edge of the middle wing segment 2 is L, wherein 0.1≤L1 / L≤1.5.

[0159] Optionally, the ratio of L1 to L may be 0.1, 0.2, 0.3, 0.5, 0.8, 1.0, or 1.5.

[0160] Optionally, L1<L. Optionally, the value of L may be 20-100 mm. Optionally, 0.3≤L1 / L≤0.6.

[0161] Optionally, 0.1≤L2 / L≤1.5.

[0162] Optionally, the ratio of L2 to L can be 0.1, 0.2, 0.3, 0.5, 0.8, 1.0, or 1.5.

[0163] Optionally, L2<L. Optionally, 0.4≤L1 / L≤0.9. Figure 16 shown.

[0164] The heat exchanger with curved fins provided in the embodiment of the present disclosure improves the matching degree between the shape of the fins and the uneven wind speed in the air duct, thereby improving the heat exchange efficiency of the heat exchanger.

[0165] Optionally, the upper fin segment 1 , the middle fin segment 2 and the lower fin segment 3 constitute arched fins.

[0166] In the embodiment of the present disclosure, the three wing segments, the upper wing segment 1, the middle wing segment 2 and the lower wing segment 3, roughly constitute a bow-shaped wing. Figures 1 to 29 Optionally, the upper wing segment 1 extends upward toward the windward side of the middle wing segment 2, and the lower wing segment 3 extends downward toward the windward side of the middle wing segment 2, so that the upper wing segment 1, the middle wing segment 2, and the lower wing segment 3 form an arch shape. Optionally, the middle wing segment 2 is arranged in a vertical direction.

[0167] Optionally, the width of the middle wing segment 2 is greater than or equal to the width of the upper wing segment 1. Optionally, the width of the middle wing segment 2 is 1 to 1.5 times the width of the upper wing segment 1. Similarly, the width of the middle wing segment 2 is greater than or equal to the width of the lower wing segment 3. Optionally, the width of the middle wing segment 2 is 1 to 1.5 times the width of the lower wing segment 3.

[0168] Optionally, the width of the upper wing segment 1 is the same as the width of the lower wing segment 3, such as Figure 18 and Figure 19 Alternatively, the width of the upper wing segment 1 is greater than the width of the lower wing segment 3, as shown in FIG. Figures 15 to 17 shown.

[0169] Optionally, the length of the middle wing section 2 is greater than or equal to the width of the middle wing section 2. The length of the middle wing section 2 can also be less than the width of the middle wing section 2.

[0170] It is understood that the width of the upper wing segment 1, the middle wing segment 2 and the lower wing segment 3 can be Figure 15 The lengths of the upper wing segment 1, the middle wing segment 2 and the lower wing segment 3 can be understood as the lengths of the windward edge or the leeward edge of the corresponding wing segment.

[0171] Optionally, the extension length of the upper wing segment 1 is less than or equal to the extension length of the lower wing segment 3 .

[0172] The extension length of the upper wing section 1 may be smaller than the extension length of the lower wing section 3, as shown in FIG. Figure 15 As shown, the upper wing segment 1, the middle wing segment 2 and the lower wing segment 3 form an irregular or asymmetrical arch structure. Optionally, the extension length of the upper wing segment 1 can also be equal to the extension length of the lower wing segment 3, as shown in FIG. Figure 18 As shown, the upper wing segment 1, the middle wing segment 2 and the lower wing segment 3 form a regular or symmetrical arch structure.

[0173] The upper wing segment 1 includes an upper leeward edge, and the lower wing segment 3 includes a lower leeward edge, wherein the angle between the upper leeward edge and the middle leeward edge of the middle wing segment 2 is greater than or equal to the angle between the lower leeward edge and the middle leeward edge of the middle wing segment 2.

[0174] The angle Q1 between the upper leeward edge and the middle leeward edge can be greater than the angle Q2 between the lower leeward edge and the middle leeward edge, such as Figure 17 Alternatively, the angle between the upper leeward edge and the middle leeward edge may be equal to the angle between the lower leeward edge and the middle leeward edge, as shown in FIG. Figure 18 shown.

[0175] Optionally, the upper leeward edge of the upper wing segment 1 is parallel to the upper windward edge; or, the middle leeward edge of the middle wing segment 2 is parallel to the middle windward edge; or, the lower leeward edge of the lower wing segment 3 is parallel to the lower windward edge.

[0176] Optionally, the upper wing segment 1 includes a straight upper leeward edge and an upper windward edge, the middle wing segment 2 includes a straight middle leeward edge and a straight middle windward edge, and the lower wing segment 3 includes a straight lower leeward edge and a lower windward edge. In this way, the upper wing segment 1, the middle wing segment 2, and the lower wing segment 3 form a fin having at least six right-angled edges.

[0177] Optionally, the first connection position between the upper wing segment 1 and the middle wing segment 2 can be an arc connection or a straight connection structure. Similarly, the second connection position between the middle wing segment 2 and the lower wing segment 3 can be an arc connection or a straight connection structure.

[0178] Optionally, the upper wing segment 1, the first connection position, the middle wing segment 2, the second connection position and the lower wing segment 3 are integrally formed.

[0179] Optionally, the edge 104 of the windward side of the fin overlaps with the edge 105 of the leeward side. In this way, multiple fins can be continuously obtained on a substrate, reducing the waste rate during fin processing. Figure 28 and Figure 29 shown.

[0180] Optionally, a perpendicular line of the first endpoint G1 falls within a region on the windward side of the middle fin section 2 of the fin.

[0181] In the embodiment of the present disclosure, the vertical line of the first end point G1 falls into the area on the windward side of the middle fin segment 2 of the fin, such as Figure 18 Optionally, the fin composed of the upper fin segment 1, the middle fin segment 2 and the lower fin segment 3 can be roughly in a regular arch shape.

[0182] Optionally, the distance between D1 and D3 is L1, and 30 mm ≤ L1 ≤ 100 mm.

[0183] In the embodiment of the present disclosure, there is a certain distance between D1 and D3. Optionally, the value of L1 can be 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, 100mm. Moreover, the distance L1 between D1 and D3 is greater than the width of the middle wing segment 2. Optionally, the distance L1 between D1 and D3 is 1.1 to 1.5 times the width of the middle wing segment 2. Figure 18 shown.

[0184] Optionally, the distance between D2 and D3 is L2, and 2mm≤L2≤50mm.

[0185] In the embodiment of the present disclosure, there is also a certain distance between D2 and D3. Optionally, the value of L2 can be 2mm, 10mm, 20mm, 30mm, 40mm, 50mm. The distance L2 between D2 and D3 is less than or equal to the width of the middle wing segment 2. Optionally, the distance L2 between D2 and D3 is 0.3 to 0.7 times the width of the middle wing segment 2. Figure 18 shown.

[0186] Optionally, the length of the middle leeward edge of the middle wing segment 2 is L, wherein 0.5≤L1 / L≤3.

[0187] Optionally, the ratio between L1 and L is greater than 1, thus increasing the curvature or bending degree of the fins, improving the matching degree between the fin shape and the uneven wind speed in the air duct, and improving the heat exchange efficiency of the heat exchanger. Optionally, 1≤L1 / L≤2. Figure 19 shown.

[0188] Optionally, 0.1≤L2 / L≤2.

[0189] Optionally, the ratio of L2 to L is greater than 0.5, which increases the curvature or bending degree of the fins, improves the matching degree between the fin shape and the uneven wind speed in the air duct, and improves the heat exchange efficiency of the heat exchanger. Optionally, 0.5≤L2 / L≤1. Figure 18 shown.

[0190] The present disclosure also provides a heat exchanger. Figures 20 to 23 shown.

[0191] Optionally, the heat exchanger includes fins and heat exchange tubes passing through the fins, wherein the fins include an upper fin section 1, a middle fin section 2 and a lower fin section 3. The upper fin section 1 includes an upper leeward edge and an upper windward edge; the middle fin section 2 is arranged at the lower part of the upper fin section 1, and a first connection position is provided between the upper fin section 1 and the middle fin section 2, and the middle fin section 2 includes a middle leeward edge and a middle windward edge; the lower fin section 3 is arranged at the lower part of the middle fin section 2, and a second connection position is provided between the middle fin section 2 and the lower fin section 3, and the lower fin section 3 includes a lower leeward edge and a lower windward edge. The extension line of the upper leeward edge and the extension line of the lower leeward edge intersect at M1, the midpoint of the middle leeward edge is N1, and N1 is located above M1. As Figure 20 shown.

[0192] In the embodiment of the present disclosure, the midpoint N1 of the middle leeward edge is located above M1 where the extension line of the upper leeward edge and the extension line of the lower leeward edge intersect. Optionally, N1 and the aforementioned D1 can be the same point.

[0193] Optionally, the vertical distance between N1 and M1 is 0.2 to 0.5 times the length L of the middle leeward edge of the middle wing segment 2 .

[0194] Optionally, the extension line of the upper windward edge and the extension line of the lower windward edge intersect at M2, and the midpoint of the middle windward edge is N2, wherein N2 is located above M2.

[0195] In the embodiment of the present disclosure, the midpoint N2 of the middle windward edge is located at the intersection of the extension line of the upper windward edge and the extension line of the lower windward edge at the upper part of M2. Optionally, N2 and the aforementioned D2 can be the same position point.

[0196] Optionally, the vertical distance between N2 and M2 is 0.2 to 0.5 times the length of the middle windward edge of the middle wing segment 2. Optionally, the vertical distance between N1 and M1 is equal to the vertical distance between N2 and M2. Figure 20 shown.

[0197] The heat exchanger provided by the embodiment of the present disclosure improves the matching degree between the shape of the fins and the uneven wind speed in the air duct, thereby improving the heat exchange efficiency of the heat exchanger.

[0198] Optionally, the straight line where N1 and M1 are located is a first straight line, and the straight line where M1 and M2 are located is a second straight line, wherein the angle between the first straight line and the second straight line is θ1, and 0°<θ1≤60°.

[0199] In the embodiment of the present disclosure, a first straight line where N1 and M1 are located and a second straight line where M1 and M2 are located form a certain angle. Optionally, the angle θ1 can be 5°, 15°, 25°, 35°, 45°, 55° or 60°.

[0200] Optionally, 20°<θ1≤45°. Figure 21 shown.

[0201] Optionally, the straight line where N2 and M2 are located is a third straight line, wherein the angle between the third straight line and the second straight line is θ2, and 0°<θ2≤60°.

[0202] In the embodiment of the present disclosure, the third straight line where N2 and M2 are located also forms a certain angle with the second straight line where M1 and M2 are located. Optionally, the angle θ2 can be 5°, 15°, 25°, 35°, 45°, 55° or 60°.

[0203] Optionally, 20°<θ2≤45°. Figure 22 shown.

[0204] Optionally, the angles θ1 and θ2 are equal.

[0205] Optionally, the straight line where N1 and N2 are located is a fourth straight line, wherein the angle between the fourth straight line and the second straight line is θ3, and 0°≤θ3≤20°.

[0206] In the embodiment of the present disclosure, the angle θ3 between the fourth straight line where N1 and N2 are located and the second straight line where M1 and M2 are located can be 0°, that is, the fourth straight line is parallel to the second straight line. Figure 23 shown.

[0207] Optionally, the angle θ3 between the fourth straight line where N1 and N2 are located and the second straight line where M1 and M2 are located may also be greater than 0° and less than or equal to 20°.

[0208] The heat exchanger provided by the embodiment of the present disclosure improves the matching degree between the shape of the fins and the uneven wind speed in the air duct, thereby improving the heat exchange efficiency of the heat exchanger.

[0209] The present disclosure also provides a heat exchanger. Figures 24 to 27 shown.

[0210] Optionally, the heat exchanger includes fins and heat exchange tubes passing through the fins, wherein the fins include an upper fin section 1 , a middle fin section 2 and a lower fin section 3 . The upper fin section 1 includes an upper fin area formed by an upper leeward edge and an upper windward edge, the upper fin area includes a first upper heat exchange hole 101 close to the middle fin area and close to the upper leeward edge, and a second upper heat exchange hole 102 close to the middle fin area and close to the upper windward edge; the middle fin section 2 is arranged at the lower part of the upper fin section 1, the middle fin section 2 includes a middle fin area formed by a middle leeward edge and a middle windward edge, the middle fin area includes a first middle heat exchange hole 201 close to the upper fin area and close to the middle leeward edge, and a second middle heat exchange hole 202 close to the upper fin area and close to the middle windward edge; the lower fin section 3 is arranged at the lower part of the middle fin section 2, the lower fin section 3 includes a lower fin area formed by a lower leeward edge and a lower windward edge. Among them, the straight line where the first upper heat exchange hole 101 and the first middle heat exchange hole 201 are located is the first heat exchange hole straight line, the straight line where the second upper heat exchange hole 102 and the second middle heat exchange hole 202 are located is the second heat exchange hole straight line, and the angle between the first heat exchange hole straight line and the second heat exchange hole straight line is β1, and 10°≤β1≤60°.

[0211] In the disclosed embodiment, the straight line between the first upper heat exchange hole 101 and the first middle heat exchange hole 201 is the first heat exchange hole straight line, and the straight line between the second upper heat exchange hole 102 and the second middle heat exchange hole 202 is the second heat exchange hole straight line. The angle β1 between the first heat exchange hole straight line and the second heat exchange hole straight line is greater than or equal to 10° and less than or equal to 60°.

[0212] Optionally, the straight line between the center of the first upper heat exchange hole 101 and the center of the first middle heat exchange hole 201 can be taken as the first heat exchange hole straight line; similarly, the straight line between the center of the second upper heat exchange hole 102 and the center of the second middle heat exchange hole 202 can be taken as the second heat exchange hole straight line. Figure 24 shown.

[0213] Optionally, the value of β1 may be 10°, 20°, 30°, 40°, 50° or 60°.

[0214] It is understood that the boundary line between the upper fin region formed by the upper fin segment 1 and the middle fin region formed by the middle fin segment 2 can be as follows: Figure 24 The boundary line between the middle fin region formed by the middle fin segment 2 and the lower fin region formed by the lower fin segment 3 can be as shown in FIG. Figure 24 As shown by the lower dotted line in .

[0215] It can be understood that when the heat exchange hole is located in both the upper fin area and the middle fin area, the heat exchange hole can be classified as the upper fin area; similarly, when the heat exchange hole is located in both the middle fin area and the lower fin area, the heat exchange hole can be classified as the middle fin area.

[0216] It is understood that the heat exchange holes are through-holes in the fins for inserting heat exchange tubes. Optionally, the diameter of the heat exchange holes can be adjusted based on the diameter of the heat exchange tubes. Optionally, when the diameters of the multiple heat exchange tubes in the heat exchanger are the same, the diameters of the multiple heat exchange holes in the fins are also the same.

[0217] The heat exchanger provided by the embodiment of the present disclosure improves the matching degree between the shape of the fins and the uneven wind speed in the air duct, thereby improving the heat exchange efficiency of the heat exchanger.

[0218] Optionally, the straight line where the first central heat exchange hole 201 and the second central heat exchange hole 202 are located is the third heat exchange hole straight line, wherein the central fin area also includes a third central heat exchange hole 203 located between the first central heat exchange hole 201 and the second central heat exchange hole 202, and the third central heat exchange hole 203 is located at the lower part of the third heat exchange hole straight line.

[0219] Similarly, the straight line where the center of the first middle heat exchange hole 201 and the center of the second middle heat exchange hole 202 lie can be taken as the third heat exchange hole straight line.

[0220] like Figure 25 As shown, the third middle heat exchange hole 203 is located below the third heat exchange hole straight line, or the third middle heat exchange hole 203 is located above the third heat exchange hole straight line. It can be understood that the first middle heat exchange hole 201, the second middle heat exchange hole 202 and the third middle heat exchange hole 203 are not on the same straight line.

[0221] Optionally, the upper fin region further includes a third upper heat exchange hole 103 close to the first upper heat exchange hole 101 , wherein the third upper heat exchange hole 103 is located on the first heat exchange hole straight line.

[0222] The third upper heat exchange hole 103 being located on the first heat exchange hole straight line can be understood as at least a portion of the third upper heat exchange hole 103 being located on the first heat exchange hole straight line.

[0223] Optionally, 10°≤β1≤30°.

[0224] Optionally, when β1 is greater than or equal to 10° and less than or equal to 30°, the fins of the heat exchanger may be in an irregular arch shape. Figure 24 shown.

[0225] Optionally, the straight line where the first central heat exchange hole 201 and the second central heat exchange hole 202 are located is the third heat exchange hole straight line, wherein the central fin area also includes a third central heat exchange hole 203 located between the first central heat exchange hole 201 and the second central heat exchange hole 202, and the third central heat exchange hole 203 is located on the third heat exchange hole straight line.

[0226] The third central heat exchange hole 203 being located on the third heat exchange hole straight line can be understood as at least a portion of the third central heat exchange hole 203 being located on the third heat exchange hole straight line. Alternatively, it can also be understood as at least a portion of the first central heat exchange hole 201, at least a portion of the second central heat exchange hole 202, and at least a portion of the third central heat exchange hole 203 being colinear. Figure 27 shown.

[0227] Optionally, the upper fin region further includes a third upper heat exchange hole 103 close to the first upper heat exchange hole 101 , wherein the third upper heat exchange hole 103 is located on the second heat exchange hole straight line.

[0228] The third upper heat exchange hole 103 being located on the second heat exchange hole straight line can be understood as at least a portion of the third upper heat exchange hole 103 being located on the second heat exchange hole straight line.

[0229] Optionally, 25°≤β1≤50°.

[0230] Optionally, when β1 is greater than or equal to 25° and less than or equal to 50°, the fins of the heat exchanger may be in a regular arch shape. Figure 26 shown.

[0231] It can be understood that, under the premise of no conflict, the embodiments of the heat exchanger in this application and the features in the embodiments can be combined with each other.

[0232] Figure 33 The velocity distribution cloud diagram of the heat exchanger in this application is compared with that of the existing I-type inclined heat exchanger. Figure 33 The figure a above is the velocity distribution cloud diagram of the existing I-type inclined heat exchanger. Figure 33 The following figure b is a velocity distribution cloud diagram of the heat exchanger of each embodiment of the present application.

[0233] from Figure 33 It can be seen that the I-type inclined heat exchanger has the characteristics of high wind speed at the top and low wind speed at the bottom. The wind speed distribution is uneven and the heat exchange efficiency of the heat exchanger is low. Figure 33As shown in the upper circle of a in the figure, the area with low wind speed in the lower part is as follows Figure 33 As shown in the lower circle of a in .

[0234] The heat exchanger provided by this application effectively guides the incoming flow in the middle high wind speed zone to the upper and lower parts, and the overall wind speed distribution is uniform. The uniform distribution of the wind field improves the uniformity of the heat exchange field and improves the overall heat exchange performance of the heat exchanger. Figure 33 As shown in b.

[0235] Furthermore, the sloped sections of the fins of the heat exchanger provided in the present application are shorter, thereby reducing the risk of poor drainage on the fin surface.

[0236] The embodiments of the present disclosure further provide an air-conditioning indoor unit, which may also be referred to as a duct-type air-conditioning device or a duct unit.

[0237] Optionally, the air conditioner indoor unit includes an indoor unit housing 4, an indoor fan 5, and a heat exchanger. The indoor unit housing 4 has a storage space within it; the indoor fan 5 is disposed within the storage space; and the heat exchanger is disposed within the storage space and on the exhaust side of the indoor fan 5. The heat exchanger is the aforementioned heat exchanger.

[0238] The air conditioner indoor unit including the aforementioned heat exchanger improves the heat exchange efficiency between the indoor fan 5 and the heat exchanger.

[0239] An embodiment of the present disclosure provides an air conditioner, wherein the heat exchanger of the air conditioner can not only adapt to the wind speed at different positions of its windward surface, but also avoid the risk of poor drainage on the heat exchanger surface, providing a better user experience.

[0240] An embodiment of the present disclosure provides an air conditioner comprising: a housing, a heat exchanger, and an indoor fan 5. The housing is provided with a mounting cavity 41; the heat exchanger is disposed within the mounting cavity 41 and comprises an upper straight plate section, a middle straight plate section, and a lower straight plate section connected in sequence. The middle straight plate section is vertically arranged, and the upper and lower straight plate sections are disposed above and below the middle straight plate section, respectively. The upper and lower straight plate sections are bent toward the indoor fan 5. The indoor fan 5 is disposed within the mounting cavity 41, and the air flow direction of the indoor fan 5 is limited to being toward the heat exchanger. A first plate section angle α between the upper and middle straight plate sections is greater than or equal to 100°, and a second plate section angle β between the lower and middle straight plate sections is greater than or equal to 100°.

[0241] like Figure 30As shown, the heat exchanger includes fins and heat exchange tubes extending through the fins. A side view of the heat exchanger viewed from the side is also a side view of the fins. In the disclosed embodiments, "the heat exchanger includes an upper straight plate section, a middle straight plate section, and a lower straight plate section connected in sequence" can be understood as meaning that the side view of the heat exchanger includes the upper straight plate section, the middle straight plate section, and the lower straight plate section. In other words, the heat exchanger's fins include the upper straight plate section, the middle straight plate section, and the lower straight plate section.

[0242] It can be understood that the upper straight plate section can also be called the aforementioned upper wing section, the middle straight plate section can also be called the aforementioned middle wing section, and the lower straight plate section can also be called the aforementioned lower wing section.

[0243] As shown in Figure x, in the embodiment of the present disclosure, each fin includes an upper fin segment, a middle fin segment, and a lower fin segment. Each fin segment has a side profile that is parallel to each other, so that each fin segment has the appearance of a straight plate segment. When multiple fins are arranged in parallel and penetrated with heat exchange tubes to form a heat exchanger, the upper fin segments of the multiple fins constitute the upper straight plate segment of the heat exchanger, the middle fin segments of the multiple fins constitute the middle straight plate segment of the heat exchanger, and the lower fin segments of the multiple fins constitute the lower straight plate segment of the heat exchanger. It will be understood that in the embodiment of the present disclosure, unless otherwise specified, the upper straight plate segment and the upper fin segment have essentially the same meaning and can be used interchangeably in some optional embodiments. Similarly, unless otherwise specified, the middle straight plate segment and the middle fin segment have essentially the same meaning and can be used interchangeably in some optional embodiments; the lower straight plate segment and the lower fin segment have essentially the same meaning and can be used interchangeably in some optional embodiments.

[0244] Specifically, the side wall of the casing is provided with an air inlet 42 and an air outlet 43, and an air duct is provided in the installation cavity 41 of the casing, and the air duct is connected to the air inlet 42 and the air outlet 43 respectively. The heat exchanger is configured as an integrated plate-shaped structure, and the heat exchanger is arranged in a vertical direction as a whole. The indoor fan 5 is arranged in the air duct, and the indoor fan 5 is located on the left or right side of the heat exchanger. The air outlet of the indoor fan 5 is connected to the heat exchanger through the air duct, and the flow direction of the air blown to the heat exchanger is perpendicular to the heat exchanger to increase the heat exchange efficiency between the heat exchanger and the air. The heat exchanger includes an upper straight plate section, a middle straight plate section and a lower straight plate section, and the middle straight plate section is arranged vertically. The upper straight plate section is located above the middle straight plate section, and the upper edge of the upper straight plate section is inclined toward the direction close to the indoor fan 5. The lower straight plate section is located below the middle straight plate section, and the lower edge of the lower duty section is tilted toward the direction close to the indoor fan 5. In this way, the heat exchanger as a whole can form a bow-shaped structure. It can be understood that, generally, when the air in the air duct is blown to the heat exchanger, the wind speed at different positions is different. Therefore, setting the heat exchanger as a whole into a bow-shaped structure is more conducive to the heat exchanger adapting to the wind speed at different positions on its windward surface, thereby improving the heat exchange efficiency of the heat exchanger. At the same time, in order to increase the heat exchange area of ​​the heat exchanger, the existing straight plate heat exchanger needs to be tilted, which causes the heat exchanger as a whole to occupy more space in the horizontal direction. Therefore, setting the heat exchanger as a whole into a bow-shaped structure can increase the heat exchange area while reducing the space occupied by the heat exchanger in the horizontal direction.

[0245] In the above embodiment, since the sidewalls of the central straight plate section are vertical planes, this can reduce the area of ​​the inclined plane of the entire heat exchanger, thereby preventing the risk of poor drainage from the heat exchanger surface. Furthermore, the first plate segment angle α between the upper and central straight plate sections can be set based on the size of the housing. For example, the first plate segment angle α between the upper and central straight plate sections can be 100°, 110°, 120°, 130°, or 140°. It will be appreciated that during air conditioning operation, condensation will be generated in the heat exchanger. Therefore, setting the first plate segment angle α to greater than or equal to 100° can increase the slope of the upper straight plate section, further preventing the risk of poor drainage from the heat exchanger surface. Similarly, the second plate segment angle β between the lower and central straight plate sections can be set based on the size of the housing. For example, the second plate segment angle β between the lower and central straight plate sections can be 100°, 110°, 120°, 130°, or 140°.

[0246] In actual applications, some existing heat exchangers are also configured as split structures to match the wind speeds of different parts. However, the multiple parts of a split heat exchanger will increase the overall scrap rate of the heat exchanger during production and processing, increasing production costs. At the same time, the multiple parts of a split heat exchanger need to be installed separately, which increases the difficulty of installing the heat exchanger. Therefore, this application configures the heat exchanger to have an integrated bow-shaped structure, which not only can match the wind speeds of different parts, but also can reduce the scrap rate during the production and processing of the heat exchanger, as well as reduce the difficulty of installing the heat exchanger.

[0247] Optionally, the connection between the upper and middle straight plate sections is configured as a rounded structure to ensure a smooth connection between the upper and middle straight plate sections, further avoiding the risk of poor drainage on the heat exchanger surface. Similarly, the connection between the lower and middle straight plate sections is also configured as a rounded structure to ensure a smooth connection between the lower and middle straight plate sections.

[0248] In some embodiments, the thickness of the middle straight plate segment is greater than the thickness of the upper straight plate segment, and the thickness of the middle straight plate segment is greater than the thickness of the lower straight plate segment.

[0249] Specifically, the middle straight section has a first thickness A1, the upper straight section has a second thickness A2, and the lower straight section has a third thickness A3. The first thickness A1 is greater than the second thickness A2 and the third thickness A3. For example, the second thickness A2 and the third thickness A3 can be 2 / 3 or 1 / 2 of the first thickness A1.

[0250] It can be understood that the first thickness A1 of the middle straight plate section is the width W2 of the second side contour line 21 of the aforementioned middle wing section; the second thickness A2 of the upper straight plate section is the width W1 of the first side contour line 11 of the aforementioned upper wing section; and the third thickness A3 of the lower straight plate section is the width W3 of the third side contour line 31 of the aforementioned lower wing section.

[0251] It is understood that when indoor fan 5 delivers air to the heat exchanger, the wind speed is highest at the center straight plate section, while the wind speed at the upper and lower straight plate sections is lower. Therefore, the thickness of the center straight plate section is greater than that of the upper and lower straight plate sections, which allows for sufficient heat exchange in the center straight plate section and ensures a more uniform wind speed after the air passes through the heat exchanger.

[0252] In some embodiments, the side wall surface of the heat exchanger close to the indoor fan 5 is configured as the windward side wall surface, and the side wall surface of the heat exchanger away from the indoor fan 5 is configured as the leeward side wall surface; wherein the size and shape of the windward side wall surface are set corresponding to the size and shape of the leeward side wall surface.

[0253] Specifically, the size and shape of the windward wall are identical to those of the leeward wall. After horizontally shifting the windward wall a certain distance, the windward and leeward walls can overlap. It will be appreciated that heat exchangers typically include fins, which are typically manufactured by continuously cutting from a large sheet of material through shearing or stamping. Therefore, aligning the shape and size of the windward and leeward walls of a heat exchanger can reduce processing waste between adjacent fins, thereby improving the efficiency of raw material utilization during heat exchanger manufacturing.

[0254] It can be understood that the windward side wall surface is the aforementioned edge of the windward side, and the leeward side wall surface is the aforementioned edge of the leeward side.

[0255] like Figure 31 and Figure 32 As shown, in some embodiments, the housing is further provided with a fixing structure 47, and the fixing structure 47 is used to fix the heat exchanger in the installation cavity.

[0256] Specifically, the side wall of the installation cavity is also provided with snap connectors such as buckles or fasteners such as screws to form a fixing structure 47. The heat exchanger can be connected to the installation cavity through the snap connectors, or the heat exchanger can be fastened to the installation cavity through fasteners.

[0257] In some embodiments, a first plate segment angle α between the upper straight plate segment and the middle straight plate segment is less than or equal to 170°; a second plate segment angle β between the lower straight plate segment and the middle straight plate segment is less than or equal to 170°.

[0258] Specifically, the first plate segment angle α between the upper and middle straight plate segments can be set based on the height of the mounting cavity. For example, the first plate segment angle α can be 170°, 160°, 150°, 140°, or 130°. This allows the overall height of the upper straight plate segment to be reduced while maintaining its heat exchange area. Similarly, the second plate segment angle β can be 170°, 160°, 150°, 140°, or 130° to reduce the height of the lower straight plate segment.

[0259] In the above embodiment, the height of the upper straight plate section refers to the distance between the horizontal plane where the upper end surface of the upper straight plate section is located and the horizontal plane where the lower end surface is located, and the height of the lower straight plate section refers to the distance between the horizontal plane where the upper end surface of the lower straight plate section is located and the horizontal plane where the lower end surface is located.

[0260] In some embodiments, the first cross-section of the upper straight plate segment is configured as a parallelogram; the second cross-section of the middle straight plate segment is configured as a rectangle; and the third cross-section of the lower straight plate segment has the same size and shape as the first cross-section of the upper straight plate segment.

[0261] Specifically, the first cross section of the upper straight plate segment and the third cross section of the lower straight plate segment are configured as a parallelogram, and the middle straight plate segment is configured as a rectangle, which can make the overall structure of the heat exchanger simpler and more convenient to produce and process.

[0262] In some embodiments, the side of the first cross section close to the indoor fan 5 constitutes an upper windward line, the side of the third cross section close to the indoor fan 5 constitutes a lower windward line, and the midpoint of the connecting line segment of the upper end point of the upper windward line and the lower end point of the lower windward line constitutes a reference F; wherein, the first connection angle e1 between the reference point F and the connecting line between the upper end point and the lower end point of the upper windward line is greater than or equal to 30° and less than or equal to 160°.

[0263] Specifically, the angle between the reference point F and the connecting line between the upper endpoint and the lower endpoint of the upper windward line is the first connecting angle e1. The first connecting angle e1 can be 30°, 60°, 90°, 120° or 160°. In this way, the inclination and length of the upper windward line can be better adapted to the wind speed at the upper straight section. It can be understood that the side of the first cross section facing away from the indoor fan 5 constitutes the upper leeward line. Since the first cross section is a parallelogram, the upper leeward line is parallel to the upper windward line, that is, the inclination and length of the upper leeward line are the same as those of the upper windward line.

[0264] In some embodiments, a second connection angle e2 between the reference point F and a connecting line between the upper endpoint and the lower endpoint of the lower windward line is greater than or equal to 30° and less than or equal to 160°.

[0265] Specifically, the angle between the reference point F and the connecting line between the upper endpoint and the lower endpoint of the lower windward line is the second connecting angle e2. The second connecting angle e2 can be 30°, 60°, 90°, 120° or 160°. In this way, the inclination and length of the lower windward line can be better adapted to the wind speed at the lower straight section. It can be understood that the side of the third cross section facing away from the indoor fan 5 constitutes the lower leeward line. Since the third cross section is a parallelogram, the lower leeward line is parallel to the lower windward line, that is, the inclination and length of the lower leeward line are the same as those of the lower windward line.

[0266] In some embodiments, the side of the second cross section close to the indoor fan 5 constitutes a median windward line; wherein, a third connection angle e3 between the reference point F and the connecting line between the upper endpoint and the lower endpoint of the median windward line is greater than or equal to 30° and less than or equal to 160°.

[0267] Specifically, the angle between reference point F and the line connecting the upper and lower endpoints of the center windward line is a third connecting angle e3. The third connecting angle e3 can be 30°, 60°, 90°, 120°, or 160°. In this way, the inclination and length of the center windward line can be better adapted to the wind speed at the center straight plate section. It will be understood that the side of the second cross-section facing away from the indoor fan 5 constitutes the center leeward line. Since the second cross-section is rectangular, the length of the center leeward line is the same as that of the center windward line.

[0268] It can be understood that the upper windward line is the aforementioned first windward side contour line, the middle windward line is the aforementioned second windward side contour line, and the lower windward line is the aforementioned third windward side contour line; the upper leeward line is the aforementioned first leeward side contour line, the middle leeward line is the aforementioned second leeward side contour line, and the lower leeward line is the aforementioned third leeward side contour line.

[0269] The embodiment of the present disclosure provides an air conditioner, wherein the indoor unit of the air conditioner comprises an indoor unit housing 4, a volute, an indoor fan 5 and a heat exchanger 6. Figure 38 and Figure 40 As shown, the volute includes a housing chamber 417 and an air outlet 46. The indoor fan 5 is disposed in the housing chamber 417, the heat exchanger 6 is disposed in the air outlet 46, and the volute is disposed in the indoor unit housing 4. The indoor unit housing 4 includes an air inlet 42 and an air outlet 43. Outside air flows into the volute through the air inlet 42, flows through the heat exchanger 6, and then flows into the room through the air outlet 43.

[0270] In some embodiments, the volute includes a housing chamber 417 and an air outlet 46. The housing chamber 417 is used to install the indoor fan 5. The air outlet 46 is connected to the outlet 4171 of the housing chamber 417. The heat exchanger 6 is disposed in the air outlet 46. The heat exchanger 6 includes a plurality of fins 64 arranged in parallel along the axis 418 of the volute. The fins 64 include an upper fin segment 1, a middle fin segment 2, and a lower fin segment 3 connected to each other. The upper fin segment 1 and the lower fin segment 3 are both inclined toward the housing chamber 417. The middle fin segment 2 includes a second windward side contour line 212. Figure 39 and Figure 40 As shown, the midpoint of the longitudinal section of the outlet 4171 of the accommodating cavity 417 is a reference point H. The opening angle of the second windward side contour line 212 corresponding to the reference point H is c1, and 6°≤c1≤50°. For example, c1 can be 6°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, or 50°.

[0271] In this embodiment, the orientation of the air conditioner is as follows: Figure 39As shown, the accommodating chamber 417 is located at the rear of the air conditioner, and the air outlet 46 is located at the front of the air conditioner. After the heat exchanger 6 is installed on the air outlet 46, the three sections of the fin 64 are called the upper fin section 1, the middle fin section 2 and the lower fin section 3 from top to bottom. Since the accommodating chamber 417 of the volute is used to install the indoor fan 5, the axis 418 of the volute is also the axis of the indoor fan 5, as shown in FIG. Figure 40 As shown. A cross section taken along the front-to-back direction of the air conditioner is called a longitudinal section, and a cross section taken perpendicular to the longitudinal section is called a transverse section. The three-segment fins 64 are arcuate or bow-shaped, hence also called arcuate fins 64 or bow-shaped fins 64. This design guides the air flowing through them. The opening angle c1 of the middle fin segment 2 is designed to be between 6° and 50°, which helps optimize the contact angle between the airflow and the middle fin segment 2, ensuring more complete heat exchange and improving heat exchange efficiency.

[0272] Optionally, 6°≤c1≤30°. For example, c1 can be selected from 6°, 8°, 12°, 16°, 22°, 26°, 28°, or 30°.

[0273] Optionally, the upper fin segment 1, the middle fin segment 2 and the lower fin segment 3 of the fin 64 are integrally formed. Figure 41 As shown in (a), to avoid confusion, the upper wing section 1 includes a first side contour line 11, which includes a first windward side contour line 112 and a first leeward side contour line 111. The middle wing section 2 includes a second side contour line 21, which includes a second windward side contour line 212 and a second leeward side contour line 211. The lower wing section 3 includes a third side contour line 31, which includes a third windward side contour line 312 and a third leeward side contour line 311. Moreover, the first windward side contour line 112, the second windward side contour line 212, and the third windward side contour line 312 constitute a windward side contour line 641, and the first leeward side contour line 111, the second leeward side contour line 211, and the third leeward side contour line 311 constitute a leeward side contour line 642. In this embodiment, the first side contour line 11 , the second side contour line 21 , and the third side contour line 31 are all straight lines, and the connection between adjacent contour lines may be rounded or not.

[0274] Alternatively, as Figure 39 As shown, the upper wing section 1 includes a first windward side contour line 112, and the opening angle of the first windward side contour line 112 corresponding to the reference point H is c2. The lower wing section 3 includes a third windward side contour line 312, and the opening angle of the third windward side contour line 312 corresponding to the reference point H is c3.

[0275] In this embodiment, the relationship between c1, c2, and c3 is limited. Among them, 0.3≤c2 / c1≤0.7, for example, c2 / c1 can be selected from 0.3, 0.4, 0.5, 0.6, or 0.7. Among them, 0.5≤c3 / c1≤0.9, for example, c3 / c1 can be selected from 0.5, 0.6, 0.7, 0.8, or 0.9. Among them, 0.6≤c1 / (c2+c3)≤1, for example, c1 / (c2+c3) can be selected from 0.6, 0.7, 0.8, 0.9, or 1. In this way, by designing the proportional relationship between the three opening angles, the contact angles of the airflow with the three wing segments can be optimized, thereby making the airflow distribution more uniform.

[0276] Alternatively, as Figure 39 As shown, the height of the upper wing segment 1 is h1, the height of the middle wing segment 2 is h2, and the height of the lower wing segment 3 is h3. Moreover, 0.2≤h2 / (h1+h2+h3)≤0.5. For example, h2 / (h1+h2+h3) can be selected as 0.2, 0.3, 0.4 or 0.5. In this way, the distribution of the circulating air can be matched by designing the height relationship of the three wing segments. When the upper wing segment 1 and the lower wing segment 3 are arranged at an angle, the length of the slope section of the fin 64 is shorter, reducing the risk of poor drainage on the surface of the fin 64.

[0277] Optionally, the height of the longitudinal section of the outlet 4171 of the accommodating cavity 417 is T, the height of the middle wing segment 2 is h2, and 1≤T / h2≤2.5. For example, T / h2 can be selected as 1, 1.2, 1.5, 1.8, 2, 2.2 or 2.5. Among them, h2 affects the heat exchange area of ​​the middle wing segment 2, and T affects the air outlet area. Through a reasonable proportional relationship design, the air outlet area is adapted to the heat exchange area of ​​the middle wing segment 2. In addition, combined with the design of the above-mentioned three opening angles and the height relationship design of the three wing segments, when the wind speed corresponding to the middle wing segment 2 is relatively large, it is beneficial for the air flowing through the middle wing segment 2 to diffuse to the upper wing segment 1 and the lower wing segment 3, and the air volume is adapted to the heat exchange area, thereby improving the heat exchange efficiency.

[0278] Optionally, the middle wing section 2 further includes a second leeward side contour line 211, and the second leeward side contour line 211 and the second windward side contour line 212 are both straight and parallel to each other. In this way, the middle wing section 2 is straight.

[0279] In some embodiments, the air conditioner includes a volute and a heat exchanger 6. The volute includes an air outlet 46, and the air outlet 46 includes a first diffuser plate 411. The heat exchanger 6 is disposed at the air outlet 46, and the heat exchanger 6 includes a plurality of fins 64 arranged in parallel along the axis 418 of the volute. The fins 64 include a windward side contour line 641, and the first diffuser plate 411 extends toward the windward side contour line 641. Figure 40As shown, the intersection of the extension direction of the first diffuser plate 411 and the windward contour line 641 is T1, the length between T1 and the nearest endpoint of the windward contour line 641 is t1, the total length of the windward contour line 641 is t, and t1 / t ≤ 30%. In this way, the intersection of the first diffuser plate 411 and the windward contour line 641 facilitates air flow guidance. Furthermore, the t1 / t ratio helps ensure that the air volume guided by the first diffuser plate 411 matches the length of the windward contour line 641, thereby improving heat exchange efficiency.

[0280] In this embodiment, the total length t of the windward side contour line 641 is equal to the sum of the lengths of the first windward side contour line 112, the second windward side contour line 212, and the third windward side contour line 312. If the intersection point T1 is closest to the upper end of the windward side contour line 641, then t1 is equal to the length between the intersection point T1 and the upper end of the windward side contour line 641; if the intersection point T1 is closest to the lower end of the windward side contour line 641, then t1 is equal to the length between the intersection point T1 and the lower end of the windward side contour line 641.

[0281] Optionally, 5%≤t1 / t≤30%. For example, t1 / t can be selected as 5%, 10%, 15%, 20%, 25% or 30%.

[0282] Alternatively, as Figure 40 As shown, the angle between the first diffuser plate 411 and the horizontal direction is For example, You can choose 5°, 10°, 20°, 30°, 40°, 50° or 60°. The value of can adjust the position of the intersection point T1, and The smaller the intersection point T1 is, the closer it is to the upper end of the first windward side contour line 112 .

[0283] Optionally, fin 64 includes an upper fin segment 1, a middle fin segment 2, and a lower fin segment 3, which are sequentially connected. Both upper fin segment 1 and lower fin segment 3 are inclined toward the axis 418 of the volute. The windward contour line 641 corresponding to upper fin segment 1 is referred to as the first windward contour line 112, and the extension direction of first diffuser 411 intersects with the first windward contour line 112 at T1. Here, first diffuser 411 is located at the upper portion of the volute.

[0284] Alternatively, as Figure 40As shown, the air outlet 46 also includes a second diffuser plate 412, which is spaced apart and disposed below the first diffuser plate 411. The second diffuser plate 412 extends toward the third windward side contour line 312. The intersection of the extension direction of the second diffuser plate 412 and the third windward side contour line 312 is T2. The length between T2 and the lower end of the third windward side contour line 312 is t2, and t2 / t ≤ 30%. Furthermore, 5% ≤ t2 / t ≤ 30%. For example, t2 / t can be selected from 5%, 10%, 15%, 20%, 25%, or 30%. In this way, the second diffuser plate 412 intersects with the third windward side contour line 312, which helps guide the air flow. Furthermore, the t2 / t ratio design helps ensure that the air volume guided by the second diffuser plate 412 matches the length of the windward side contour line 641.

[0285] Alternatively, as Figure 40 As shown, the angle between the second diffuser plate 412 and the horizontal direction is For example, You can choose 5°, 10°, 20°, 30°, 40°, 50° or 60°. The value of can adjust the position of the intersection point T2, and The larger the intersection point T2 is, the closer it is to the lower end of the third windward side contour line 312. In this way, the first diffuser plate 411 and the second diffuser plate 412 form a diffuser guide. and The value design combined with the ratio design of t1 / t and t2 / t can make the air diffuse evenly toward the heat exchanger 6.

[0286] Alternatively, as Figure 40 As shown, the air outlet 46 also includes a third diffuser plate 413, which is connected to the first diffuser plate 411 and extends upward. The fin 64 also includes a leeward side contour line 642. The leeward side contour line 642 corresponding to the upper fin segment 1 is called the first leeward side contour line 111. In addition, the first leeward side contour line 111 intersects with the third diffuser plate 413 and forms an angle γ1, and 20°≤γ1≤90°. For example, γ1 can be selected from 20°, 30°, 40°, 50°, 60°, 70°, 80°, or 90°.

[0287] Alternatively, as Figure 40As shown, the air outlet 46 also includes a fourth diffuser plate 414 and a sixth diffuser plate 416. The fourth diffuser plate 414 is connected to the second diffuser plate 412 and extends downward, and the sixth diffuser plate 416 is connected to the fourth diffuser plate 414 and extends upward. The fin 64 also includes a leeward side contour line 642. The leeward side contour line 642 corresponding to the lower wing segment 3 is called the third leeward side contour line 311. In addition, the angle formed by the intersection of the third leeward side contour line 311 and the sixth diffuser plate 416 is γ2, and 20°≤γ2≤90°. For example, γ2 can be selected from 20°, 30°, 40°, 50°, 60°, 70°, 80° or 90°.

[0288] In some embodiments, the volute includes a receiving cavity 417 and an air outlet 46, and the air outlet 46 includes a first air outlet 44 and a second air outlet 45. Figure 40 As shown, the interior of the accommodating chamber 417 is used to mount the indoor fan 5. A first air outlet 44 is connected to the outlet 4171 of the accommodating chamber 417, and the cross-sectional area of ​​the air flow of the first air outlet 44 gradually increases along the outlet direction. A second air outlet 45 is connected to the outlet 441 of the first air outlet 44 and is used to mount the heat exchanger 6. The cross-sectional area of ​​at least part of the second air outlet 45 is larger than the maximum cross-sectional area of ​​the air flow of the first air outlet 44.

[0289] In this embodiment, the orientation of the air conditioner is as follows: Figure 39 As shown, a cross section taken along the front-to-back direction of the air conditioner is called a longitudinal cross section, and a cross section taken perpendicular to the longitudinal cross section is called a transverse cross section. The cross-sectional area of ​​the air flow through the first air outlet 44 refers to the cross-sectional area of ​​the first air outlet 44, while the cross-sectional area of ​​the air flow through the second air outlet 45 refers to the cross-sectional area of ​​the second air outlet 45. The heat exchanger 6 is entirely disposed within the second air outlet 45, ensuring that all air flowing out of the volute exchanges heat with the heat exchanger 6. Furthermore, because the cross-sectional area of ​​the air flow through the first air outlet 44 gradually increases along the outlet direction, a diffuse flow is formed. The reduced flow velocity after diffusion facilitates sufficient contact between the air and the heat exchanger 6. Because the cross-sectional area of ​​the air flow through at least part of the second air outlet 45 is larger than the maximum cross-sectional area of ​​the air flow through the first air outlet 44, the second air outlet 45 acts as a buffer against the sudden increase in cross-sectional area, facilitating uniform air contact with the heat exchanger 6. Thus, the structural design of the volute effectively improves the heat exchange efficiency between the air and the heat exchanger 6.

[0290] Alternatively, as Figure 40 As shown, the first air outlet 44 includes a first diffuser plate 411 and a second diffuser plate 412. The first diffuser plate 411 is parallel to the axis 418 of the volute and extends downward. The angle between the first diffuser plate 411 and the horizontal direction is The second diffuser plate 412 is spaced apart from the first diffuser plate 411 and is arranged non-parallel to the first diffuser plate 411. The second diffuser plate 412 is parallel to the axis 418 of the volute and extends downward. In addition, the angle between the second diffuser plate 412 and the horizontal direction is In this embodiment, the first diffuser plate 411 is located at the upper part of the volute, and the second diffuser plate 412 is located at the lower part of the volute. The first diffuser plate 411 and the second diffuser plate 412 form a diffuser guide, and through and The value design optimizes the diffusion direction, which is conducive to the uniform diffusion of air towards the heat exchanger 6.

[0291] Alternatively, as Figure 40 As shown, the second air outlet 45 includes a third diffuser plate 413, a fourth diffuser plate 414, a fifth diffuser plate 415 and a sixth diffuser plate 416. The third diffuser plate 413 is connected to the first diffuser plate 411 and extends upward. The angle between the third diffuser plate 413 and the first diffuser plate 411 is and The fourth diffuser plate 414 is connected to the second diffuser plate 412 and extends downward. The angle between the fourth diffuser plate 414 and the second diffuser plate 412 is and The fifth diffuser plate 415 is connected to the third diffuser plate 413 and extends downward. The angle between the fifth diffuser plate 415 and the third diffuser plate 413 is and The sixth diffuser plate 416 is connected to the fourth diffuser plate 414 and extends upward. The angle between the sixth diffuser plate 416 and the fourth diffuser plate 414 is and For example, You can choose 10°, 15°, 20°, 25° or 30°. For example, You can choose 40°, 45°, 50°, 55° or 60°. For example, You can choose 15°, 20°, 25°, 30° or 35°. For example, You can choose 40°, 45°, 50°, 55° or 60°.

[0292] In this embodiment, the volute is installed after the air conditioner, and the orientation of the air conditioner is as follows: Figure 39 As shown. The upward extension of the pressure diffuser refers to the extension toward the top of the air conditioner, and the downward extension refers to the extension toward the bottom of the air conditioner. In this way, through the design of multiple pressure diffusers of the second air outlet 45, and and The value design makes the cross-sectional area of ​​the second air outlet portion 45 located upstream of the heat exchanger 6 suddenly increase, thereby having a buffering effect, and the cross-sectional area of ​​the second air outlet portion 45 close to the air outlet 43 is reduced again, thereby having the effect of gathering air.

[0293] In some embodiments, the air conditioner includes a heat exchanger 6 and the above-mentioned volute. Figure 39 As shown, the heat exchanger 6 is arranged in the second air outlet 45, and the distance between the outlet 4171 of the accommodating chamber 417 and the heat exchanger 6 is U1, and the distance between the outlet 451 of the second air outlet 45 and the heat exchanger 6 is U2. In addition, 0.1≤U2 / U1≤2. For example, U2 / U1 can be selected as 0.1, 0.3, 0.5, 0.7, 1, 1.2, 1.4, 1.6, 1.8 or 2. By optimizing the value of U2 / U1, it is beneficial to adapt the air circulation distance before and after the heat exchanger 6, thereby improving the air circulation efficiency. In this embodiment, U1 is the minimum distance between the outlet 4171 of the accommodating chamber 417 and the windward side contour line 641. U2 is the minimum distance between the outlet 451 of the second air outlet 45 and the leeward side contour line 642.

[0294] Optionally, 30 mm ≤ U1 ≤ 150 mm. For example, U1 can be 30 mm, 60 mm, 80 mm, 100 mm, 110 mm, 120 mm, 130 mm, or 150 mm.

[0295] Optionally, 10 mm ≤ U2 ≤ 150 mm. For example, U2 can be 10 mm, 20 mm, 30 mm, 60 mm, 80 mm, 100 mm, 110 mm, 120 mm, 130 mm, or 150 mm.

[0296] Alternatively, as Figure 39 As shown, the height of the upper fin segment 1 is h1, the height of the middle fin segment 2 is h2, and the height of the lower fin segment 3 is h3. Moreover, 0.3≤U1 / (h1+h2+h3)≤2. For example, U1 / (h1+h2+h3) can be selected as 0.3, 0.5, 0.8, 1, 1.2, 1.5, 1.7 or 2. Among them, U1 affects the flow state of the airflow before entering the heat exchanger 6. If the spacing is too small, the velocity distribution of the airflow may be uneven when entering the heat exchanger 6, and if the spacing is too large, the flow loss may increase. The value of h1+h2+h3 affects the overall heat exchange height of the fin 64. By optimizing the ratio of U1 / (h1+h2+h3), it is ensured that the airflow contacts the fin 64 evenly and efficiently.

[0297] In some embodiments, the heat exchanger 6 includes fins 64, which include a middle fin section 2, an upper fin section 1, and a lower fin section 3. Figure 41As shown in (b), the surface of the middle fin segment 2 is provided with a first heat transfer unit 12, and the first heat transfer unit 12 includes P1 first heat transfer structures 121. The upper fin segment 1 is bent and connected to the upper end of the middle fin segment 2, and the surface is provided with a second heat transfer unit 13. The second heat transfer unit 13 includes P2 second heat transfer structures 131. The lower fin segment 3 is bent and connected to the lower end of the middle fin segment 2, and is on the same side of the middle fin segment 2 as the upper fin segment 1. The surface of the lower fin segment 3 is provided with a third heat transfer unit 14, and the third heat transfer unit 14 includes P3 third heat transfer structures 141. Among them, 1 ≤ P1 < P2, and / or, 1 ≤ P1 < P3, and / or, 1 ≤ P3 < P2.

[0298] In this embodiment, the functions of the first heat transfer structure 121, the second heat transfer structure 131, and the third heat transfer structure 141 are all to enhance the heat transfer capacity of the corresponding fin segment. When the upper fin segment 1 and the lower fin segment 3 are bent, it will affect the direction and velocity of the air flowing through. By optimizing the numerical relationship of P1, P2, and P3, it is possible to adapt to the air flow characteristics of different fin segments, guide the air flow of the middle fin segment 2 to the upper fin segment 1 and the lower fin segment 3, and thereby improve the overall heat exchange efficiency of the fin 64.

[0299] Optionally, 1 ≤ P1 ≤ 10. For example, P1 can be selected as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. Optionally, 1 ≤ P2 ≤ 10. For example, P2 can be selected as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. Optionally, 1 ≤ P3 ≤ 10. For example, P3 can be selected as 1, 2, 3, 4, 5, 6, 7, 8, 9, 10. For example, each first heat transfer unit 12 includes 2 first heat transfer structures 121. Each second heat transfer unit 13 includes 4 second heat transfer structures 131. Each third heat transfer unit 14 includes 3 third heat transfer structures 141. That is, P1 = 2, P2 = 4, P3 = 3.

[0300] Optionally, the first heat transfer structure 121 and / or the second heat transfer structure 131 and / or the third heat transfer structure 141 is / are configured as a bridge plate structure 65, as Figure 42 shown. The bridge plate structure 65 includes a bridge top wall 651 parallel to the fin 64, and bridge side walls 652 respectively and obliquely connected to the fin 64 at both ends of the bridge top wall 651.

[0301] Optionally, the first heat transfer structure 121 and / or the second heat transfer structure 131 and / or the third heat transfer structure 141 is / are configured as a louver structure 66, as Figure 43 shown. The louver structure 66 includes a window top wall 661 non - parallel to the fin 64, and window side walls 662 respectively and connected to the fin 64 at both ends of the window top wall 661.

[0302] Optionally, 0.5mm≤zn1≤0.7mm, and / or 1mm≤zn2≤1.8mm, and / or 5mm≤zn3≤10mm, and / or 10°≤zn4≤90°, and / or zn5≤2mm. Here, zn1 is the height of the bridge structure 65 or the louver structure 66, zn2 is the width of the bridge structure 65 or the louver structure 66, zn3 is the length of the bridge structure 65 or the louver structure 66, zn4 is the angle between the bridge side wall 652 and the fin 64 or the angle between the window top wall 661 and the fin 64, and zn5 is the spacing between adjacent bridge structures 65 or adjacent louver structures 66.

[0303] In this embodiment, n represents the nth heat transfer structure. For example, when n = 1, z11 represents the height of the bridge structure 65 or louver structure 66 corresponding to the first heat transfer structure 121; when n = 2, z21 represents the height of the bridge structure 65 or louver structure 66 corresponding to the second heat transfer structure 131; when n = 3, z31 represents the height of the bridge structure 65 or louver structure 66 corresponding to the third heat transfer structure 141, and so on. It should be noted that when the first heat transfer unit 12 has multiple bridge structures 65 or louver structures 66, the heights of all bridge structures 65 or louver structures 66 are within the value range of zn1.

[0304] Optionally, the characteristic parameters of the first heat transfer structure 121, the second heat transfer structure 131 and the third heat transfer structure 141 are the same or different, and / or the characteristic parameters of part or all of the first heat transfer structure 121 are the same or different, and / or the characteristic parameters of part or all of the second heat transfer structure 131 are the same or different, and / or the characteristic parameters of part or all of the third heat transfer structure 141 are the same or different. Figure 42 、 Figure 43 and Figure 44 As shown, the characteristic parameters include zn1, zn2, zn3, zn4 and zn5.

[0305] Optionally, 0.5mm≤z11≤0.7mm, and / or, 1.6mm≤z12≤1.8mm, and / or, 3mm≤z13≤10mm, and / or, 10°≤z14≤90°, and / or, z15≤2mm; wherein, z11 is the height of the bridge structure 65 or the louver structure 66 corresponding to the first heat transfer structure 121, z12 is the width of the bridge structure 65 or the louver structure 66 corresponding to the first heat transfer structure 121, z13 is the length of the bridge structure 65 or the louver structure 66 corresponding to the first heat transfer structure 121, and z15 is the spacing between the bridge structures 65 or the louver structures 66 corresponding to adjacent first heat transfer structures 121.

[0306] For example, z11 can be selected as 0.5mm, 0.6mm, or 0.7mm. For example, z12 can be selected as 1.6mm, 1.7mm, or 1.8mm. For example, z13 can be selected as 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, or 10mm. For example, z14 can be selected as 10°, 20°, 30°, 45°, 60°, or 90°. When the first heat transfer structure 121 is a bridge structure 65, 1mm≤z15≤2mm. For example, z15 can be selected as 1mm, 1.2mm, 1.4mm, 1.5mm, 1.8mm, or 2mm. When the first heat transfer structure 121 is a louver structure 66, 0≤z15≤2mm. When z15=0mm, it means that there is no gap between the two louver structures 66.

[0307] Optionally, 0.5mm≤z21≤0.7mm, and / or, 1mm≤z22≤1.3mm, and / or, 5mm≤z23≤10mm, and / or, 10°≤z24≤90°, and / or, z25≤1.7mm; z21 is the height of the bridge structure 65 or the louver structure 66 corresponding to the second heat transfer structure 131, z22 is the width of the bridge structure 65 or the louver structure 66 corresponding to the second heat transfer structure 131, z23 is the length of the bridge structure 65 or the louver structure 66 corresponding to the second heat transfer structure 131, and z25 is the spacing between the bridge structures 65 or the louver structures 66 corresponding to adjacent second heat transfer structures 131.

[0308] For example, z21 can be selected as 0.5mm, 0.6mm or 0.7mm. For example, z22 can be selected as 1mm, 1.2mm or 1.3mm. For example, z23 can be selected as 5mm, 6mm, 7mm, 8mm, 9mm or 10mm. For example, z24 can be selected as 10°, 20°, 30°, 45°, 60° or 90°. In the case where the second heat transfer structure 131 is a bridge structure 65, 1.1mm≤z25≤1.7mm, for example, z25 can be selected as 1.1mm, 1.2mm, 1.4mm, 1.5mm, 1.6mm or 1.7mm. In the case where the second heat transfer structure 131 is a louver structure 66, 0mm≤z25≤1.7mm, and when z25=0mm, it means that there is no gap between the two louver structures 66.

[0309] Optionally, 0.5 mm < z31 < 0.7 mm, and / or, 1.6 mm < z32 < 1.8 mm, and / or, 5 mm ≤ z33 ≤ 10 mm, and / or, 10° ≤ z34 ≤ 90°, and / or, z35 ≤ 1.7 mm; z31 is the height of the bridge plate structure 65 or the louver structure 66 corresponding to the third heat transfer structure 141, z32 is the width of the bridge plate structure 65 or the louver structure 66 corresponding to the third heat transfer structure 141, z33 is the length of the bridge plate structure 65 or the louver structure 66 corresponding to the third heat transfer structure 141, and z35 is the spacing between the bridge plate structures 65 or the louver structures 66 corresponding to adjacent third heat transfer structures 141.

[0310] For example, z31 can be selected as 0.5 mm, 0.6 mm or 0.7 mm. For example, z32 can be selected as 1.6 mm, 1.7 mm or 1.8 mm. For example, z33 can be selected as 5 mm, 6 mm, 7 mm, 8 mm, 9 mm or 10 mm. For example, z34 can be selected as 10°, 20°, 30°, 45°, 60° or 90°. When the third heat transfer structure 141 is the bridge plate structure 65, 1.1 mm ≤ z35 ≤ 1.7 mm. For example, z35 can be selected as 1.1 mm, 1.2 mm, 1.4 mm, 1.5 mm, 1.6 mm or 1.7 mm. When the third heat transfer structure 141 is the louver structure 66, 0 mm ≤ z35 ≤ 1.7 mm. When z35 = 0 mm, it means there is no gap between two louver structures 66.

[0311] Optionally, as Figure 45 shown, the wind resistance coefficient of the middle fin segment 2 is f1, the wind resistance coefficient of the upper fin segment 1 is f2, and the wind resistance coefficient of the lower fin segment 3 is f3; where, f1 < f2, and / or, f1 < f3, and / or, f2 = f3.

[0312] In this embodiment, by optimizing the wind resistance coefficients of the three fin segments, the parameter designs of different fin segments can be matched. Here, the wind resistance coefficient can be determined according to the following methods:

[0313] f = 2F / (ρ * (v^2)), where f is the wind resistance coefficient, F is the wind resistance, ρ is the density of the incoming air, and v is the wind speed. And, the wind resistance corresponding to the middle fin segment 2 is denoted as F1, and the corresponding wind speed is v1; the wind resistance corresponding to the upper fin segment 1 is denoted as F2, and the corresponding wind speed is v2; the wind resistance corresponding to the lower fin segment 3 is denoted as F3, and the corresponding wind speed is v3.

[0314] Because the air density changes minimally, the air density corresponding to each wing segment can be assumed to be equal. Since the pressure differentials before and after the air flows through each wing segment are very similar, we can assume that F1 = F2 = F3. Therefore, f ∝ 1 / (v^2), meaning that f and v are inversely proportional. When f1 < f2, v1 is greater than v2; when f1 < f3, v1 is greater than v3. When f2 = f3, v2 equals v3.

[0315] Optionally, in the upper wing section 1 or the lower wing section 3 , the farther the area is from the middle wing section 2 , the greater the drag coefficient.

[0316] For example, Figure 46 As shown in (a), the upper wing section 1 includes a first wind resistance region and a second wind resistance region. The first wind resistance region is close to the middle wing section 2, and the second wind resistance region is located on the side of the first wind resistance region away from the middle wing section 2. Furthermore, the drag coefficient corresponding to the first wind resistance region is f21, and the drag coefficient corresponding to the second wind resistance region is f22, with f1 < f21 < f22.

[0317] For example, Figure 46 (b) The lower wing section 3 includes a third wind resistance region and a fourth wind resistance region. The third wind resistance region is adjacent to the middle wing section 2, and the fourth wind resistance region is located on a side of the third wind resistance region away from the middle wing section 2. Furthermore, the drag coefficient corresponding to the third wind resistance region is f31, and the drag coefficient corresponding to the fourth wind resistance region is f32, with f1 < f31 < f32.

[0318] The above description and the accompanying drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may include structural and other changes. The embodiments represent only possible variations. Unless expressly required, individual components and functions are optional, and the order of operations may vary. Portions and features of some embodiments may be included in or replace portions and features of other embodiments. The embodiments of the present disclosure are not limited to the structures described above and shown in the accompanying drawings, and various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A fin, characterized in that: include: The upper wing segment (1) comprises parallel straight first side contour lines (11) with a spacing of W1; A middle wing segment (2) is provided at the lower portion of the upper wing segment (1) and is bent and connected to the upper wing segment (1), wherein the middle wing segment (2) comprises straight second side contour lines (21) that are parallel to each other and have a spacing of W2; and The lower wing section (3) is arranged at the lower part of the middle wing section (2) and is bent and connected to the middle wing section (2). The lower wing section (3) includes a straight third side contour line (31) parallel to each other and with a spacing of W3. The first side contour line (11) includes a first leeward side contour line (111) and a first windward side contour line (112), the second side contour line (21) includes a second leeward side contour line (211) and a second windward side contour line (212), the third side contour line (31) includes a third leeward side contour line (311) and a third windward side contour line (312), the angle between the first windward side contour line (112) and the second windward side contour line (212) is a first plate segment angle α, and the angle between the second windward side contour line (212) and the third windward side contour line (312) is a second plate segment angle β, wherein, α ≥ 100°; and / or, β≥100°。 2. The fin according to claim 1, characterized in that α≤170°; and / or, β≤170°。 3. The fin according to claim 1, characterized in that Assume that the midpoint of the line connecting the upper end point of the first windward side contour line (112) and the lower end point of the third windward side contour line (312) is a reference point F, the fourth angle of the second windward side contour line (212) corresponding to the reference point F is e1, the fifth angle of the first windward side contour line (112) corresponding to the reference point F is e2, and the sixth angle of the third windward side contour line (312) corresponding to the reference point F is e3, wherein, 30°≤e1≤160°; and / or, 15°≤e2≤100°; and / or, 15°≤e3≤100°。 4. The fin according to claim 3, characterized in that 27°≤e1≤67°; and / or, 45°≤e2≤75°; and / or, 62°≤e3≤92°。 5. The fin according to claim 4, characterized in that 0.3≤e1 / e2≤1; and / or, 0.25≤e1 / e3≤0.

85.

6. The fin according to claim 3, characterized in that e2≠e3, and 50°≤e1≤80°; and / or, 18°≤e2≤48°; and / or, 65°≤e3≤95°。 7. The fin according to claim 6, characterized in that 1.7≤e1 / e2≤2.3; and / or, 0.5≤e1 / e3≤1.

2.

8. The fin according to claim 1, characterized in that The upper end point of the first leeward side contour line (111) is G1, Among them, the perpendicular line of G1 falls into the middle fin segment (2) of the fin.

9. The fin according to claim 8, characterized in that The first midpoint of the second leeward side contour line (211) is D1, the first horizontal line p passing through the first midpoint D1 intersects the second windward side contour line (212) at a second point D2, the vertical line of the first end point G1 intersects the first horizontal line p at a third point D3, the distance between D1 and D3 is L1, and the distance between D2 and D3 is L2, wherein, 10mm≤L1≤55mm; and / or, 2mm≤L2≤40mm; and / or, L1≤L2.

10. The fin according to claim 9, characterized in that The length of the second leeward side contour line (211) of the middle wing segment (2) is L, Among them, 0.1≤L1 / L≤1.

5.

11. The fin according to claim 10, characterized in that 0.3≤L1 / L≤0.6; and / or, 0.1≤L2 / L≤1.5; and / or, 0.4≤L2 / L≤0.

9.

12. A heat exchanger, characterized in that: The heat exchange device comprises a fin and a heat exchange tube passing through the fin, wherein the fin is the fin according to any one of claims 1 to 11.

13. A ducted air conditioner, characterized in that: Comprising the heat exchanger of claim 12.

14. The air duct machine according to claim 13, characterized in that: Also includes: The volute comprises a receiving chamber (417) and an air outlet (46), wherein the receiving chamber (417) is used to install an indoor fan (5), the air outlet (46) is connected to an outlet (4171) of the receiving chamber (417), and the heat exchanger (6) is arranged in the air outlet (46). The midpoint of the longitudinal section of the outlet (4171) of the accommodating cavity (417) is a reference point H, the second windward side contour line (212) of the middle wing segment (2) corresponds to an opening angle of c1 at the reference point H, the first windward side contour line (112) of the upper wing segment (1) corresponds to an opening angle of c2 at the reference point H, and the third windward side contour line (312) of the lower wing segment (3) corresponds to an opening angle of c3 at the reference point H, wherein: 6°≤c1≤50°; and / or, 0.3≤c2 / c1≤0.7; and / or, 0.5≤c3 / c1≤0.9; and / or, 0.6≤c1 / (c2+c3)≤1.

15. The air duct machine according to claim 14, characterized in that: The air outlet portion (46) includes a first diffuser plate (411), the fin (64) includes a windward side contour line (641), and the first diffuser plate (411) extends toward the windward side contour line (641). The intersection point of the extension direction of the first diffuser plate (411) and the windward side contour line (641) is T1, the length between T1 and the nearest end point of the windward side contour line (641) is t1, and the total length of the windward side contour line (641) is t, wherein 5%≤t1 / t≤30%.

16. The air duct machine according to claim 15, characterized in that: The air outlet portion (46) includes a first air outlet portion (44) and a second air outlet portion (45), wherein the first air outlet portion (44) is connected to the outlet (4171) of the accommodating chamber (417), and the cross-sectional area of ​​the gas flow of the first air outlet portion (44) gradually increases along the air outlet direction, and the second air outlet portion (45) is connected to the outlet (441) of the first air outlet portion (44) and is used to set the heat exchanger (6), and the cross-sectional area of ​​the gas flow of at least part of the second air outlet portion (45) is greater than the maximum cross-sectional area of ​​the gas flow of the first air outlet portion (44). The first air outlet portion (44) includes a first diffuser plate (411) and a second diffuser plate (412), and the second air outlet portion (45) includes a third diffuser plate (413), a fourth diffuser plate (414), a fifth diffuser plate (415), and a sixth diffuser plate (416). The third diffuser plate (413) is connected to the first diffuser plate (411) and extends upward. The angle between the third diffuser plate (413) and the first diffuser plate (411) in their extending directions is φ3. The fourth diffuser plate (414) is connected to the second diffuser plate. (412) and extends downward, the angle between the fourth diffuser plate (414) and the second diffuser plate (412) in the extension direction is φ5, the fifth diffuser plate (415) is connected to the third diffuser plate (413) and extends downward, the angle between the fifth diffuser plate (415) and the third diffuser plate (413) in the extension direction is φ4, the sixth diffuser plate (416) is connected to the fourth diffuser plate (414) and extends upward, the angle between the sixth diffuser plate (416) and the fourth diffuser plate (414) in the extension direction is φ6, wherein, 10°≤φ3≤30°; and / or, 40°≤φ4≤60°; and / or, 15°≤φ5≤35°; and / or, 40°≤φ6≤60°.

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