Heat exchanger with arc-shaped fins and air conditioner indoor unit

Abstract

The application relates to the air conditioning technical field, and discloses a heat exchanger with arc-shaped fins, which comprises fins and heat exchange pipes penetrating through the fins, the fins comprising: an upper fin segment comprising mutually parallel linear first side profile lines with a spacing W1; a middle fin segment arranged at the lower part of the upper fin segment and bently connected with the upper fin segment, the middle fin segment comprising mutually parallel linear second side profile lines with a spacing W2; and a lower fin segment arranged at the lower part of the middle fin segment and bently connected with the middle fin segment, the lower fin segment comprising mutually parallel linear third side profile lines with a spacing W3, wherein W2>=W1, and W2>W3. The heat exchanger with the arc-shaped fins improves the overall heat exchange efficiency of the heat exchanger. Meanwhile, the application further discloses an air conditioner indoor unit.

Description

[0001] This application claims priority to Chinese Patent Application No. 202422612380.6, filed October 28, 2024, entitled “Air Conditioner”, and Chinese Patent Application No. 202423186322.8, filed December 23, 2024, entitled “Heat Exchanger with Arc-shaped Fins and Air Conditioner Indoor Unit”, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of household appliance technology, such as a heat exchanger with arc-shaped fins and an indoor air conditioning unit. Background Technology

[0003] In air conditioners, heat exchangers, including evaporators and condensers, are the main energy-consuming structural components. The performance of the heat exchanger directly affects the energy consumption level of the air conditioner. Wall-mounted, floor-standing, and ducted household air conditioners widely use finned tube heat exchangers, whose external air-side thermal resistance typically accounts for 70%-90% of the total thermal resistance, thus determining the overall performance of the heat exchanger.

[0004] In the process of implementing the embodiments of this disclosure, at least the following problems were found in the related art: Taking the indoor unit of a ducted air conditioner as an example, it often uses an I-type inclined heat exchanger. However, under the condition of non-uniform air field distribution, this type of heat exchanger results in insufficient heat exchange area in the high air velocity zone formed by the indoor fan, while there is excess heat exchange area in the low air velocity zone. This prevents the heat exchanger from performing at its full potential and reduces its heat exchange efficiency.

[0005] It should be noted that the information disclosed in the background section above 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 those skilled in the art. Utility Model Content

[0006] To provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is given below. This summary is not intended as a general commentary, nor is it intended to identify key / important components or describe the scope of protection of these embodiments, but rather as a prelude to the detailed description that follows.

[0007] This disclosure provides a heat exchanger and an indoor air conditioning unit with arc-shaped fins, which improves the overall heat exchange efficiency of the heat exchanger.

[0008] In some embodiments, a heat exchanger having arcuate fins includes fins and heat exchange tubes passing through the fins. The fins include: an upper fin segment including parallel straight first side profiles with a spacing of W1; a middle fin segment disposed below the upper fin segment and bent to connect with the upper fin segment, the middle fin segment including parallel straight second side profiles with a spacing of W2; and a lower fin segment disposed below the middle fin segment and bent to connect with the middle fin segment, the lower fin segment including parallel straight third side profiles with a spacing of W3, wherein W2≥W1 and W2>W3.

[0009] In some alternative embodiments, 1 ≤ W2 / W1 ≤ 2; and / or, 1 ≤ W2 / W3 ≤ 2.

[0010] In some optional embodiments, the first side profile line includes a first leeward side profile line and a first windward side profile line, the second side profile line includes a second leeward side profile line and a second windward side profile line, and the third side profile line includes a third leeward side profile line and a third windward side profile line. Let the midpoint of the line connecting the upper endpoint of the first windward side profile line and the lower endpoint of the third windward side profile line be a reference point F, the first angle of the second leeward side profile line corresponding to the reference point F be d1, the second angle of the first leeward side profile line corresponding to the reference point F be d2, and the third angle of the third leeward side profile line corresponding to the reference point F be d3, wherein 5°≤d1≤160°; and / or 10°≤d2≤100°; and / or 15°≤d3≤100°.

[0011] In some alternative embodiments, 10°≤d1≤40°; and / or, 35°≤d2≤65°; and / or, 45°≤d3≤75°.

[0012] In some alternative embodiments, 0.4 ≤ d1 / d2 ≤ 0.6; and / or, 0.3 ≤ d1 / d3 ≤ 0.5.

[0013] In some alternative embodiments, d2 ≠ d3, and 20° ≤ d1 ≤ 50°; and / or 12° ≤ d2 ≤ 42°, and / or 40° ≤ d3 ≤ 80°.

[0014] In some alternative embodiments, 1.2 ≤ d1 / d2 ≤ 1.4; and / or, 0.45 ≤ d1 / d3 ≤ 0.7.

[0015] In some optional embodiments, the angle between the first windward profile line and the second windward profile line is the first plate segment angle α, and the angle between the second windward profile line and the third windward profile line is the second plate segment angle β, wherein α ≥ 100°; and / or β ≥ 100°.

[0016] In some alternative embodiments, α ≤ 170°; and / or, β ≤ 170°.

[0017] In some embodiments, the indoor unit of the air conditioner includes a heat exchanger with arcuate fins as described above.

[0018] In some optional embodiments, the indoor unit of the air conditioner further includes: a volute, including a receiving cavity and an air outlet, the receiving cavity being used to install an indoor fan, the air outlet being connected to the outlet of the receiving cavity, a heat exchanger being disposed in the air outlet, the midpoint of the longitudinal section of the outlet of the receiving cavity being a reference point H, the second windward profile of the middle wing segment corresponding to the reference point H having an angle of c1, the first windward profile of the upper wing segment corresponding to the reference point H having an angle of c2, and the third windward profile of the lower wing segment corresponding to the reference point H having 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.

[0019] In some alternative embodiments, the air outlet includes a first diffuser plate, the fins include a windward profile line, the first diffuser plate extends toward the windward profile line, the intersection point of the extension direction of the first diffuser plate and the windward profile line is T1, the length between T1 and the nearest endpoint of the windward profile line is t1, and the total length of the windward profile line is t, wherein 5%≤t1 / t≤30%.

[0020] 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 receiving cavity, and the cross-sectional area of ​​the gas flow in 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 install a heat exchanger. At least a portion of the cross-sectional area of ​​the gas flow in the second air outlet is larger than the maximum cross-sectional area of ​​the gas flow in 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. The angle between the third diffuser and the first diffuser is φ3. The fourth diffuser is connected to the second diffuser and extends downward, with an angle of φ5 between the fourth diffuser and the second diffuser. The fifth diffuser is connected to the third diffuser and extends downward, with an angle of φ4 between the fifth diffuser and the third diffuser. The sixth diffuser is connected to the fourth diffuser and extends upward, with an angle of φ6 between the sixth diffuser and the fourth diffuser. Wherein, 10°≤φ3≤30°; and / or, 40°≤φ4≤60°; and / or, 15°≤φ5≤35°; and / or, 40°≤φ6≤60°.

[0021] The heat exchanger and air conditioning indoor unit with arc-shaped fins provided in this disclosure can achieve the following technical effects: This disclosure provides a heat exchanger with arc-shaped fins, including fins and heat exchange tubes passing through the fins. The fins include an upper fin segment, a middle fin segment, and a lower fin segment. The upper fin segment includes parallel straight first side profile lines with a spacing of W1; the middle fin segment is disposed below the upper fin segment and bent to connect with it, and includes parallel straight second side profile lines with a spacing of W2; the lower fin segment is disposed below the middle fin segment and bent to connect with it, and includes parallel straight third side profile lines with a spacing of W3, wherein W2 ≥ W1, and W2 > W3.

[0022] As can be seen, this embodiment provides an overall arc-shaped fin, with the upper, middle, and lower fin segments all having straight side contour lines. The spacing W1 of the first side contour lines forms the width of the upper fin segment, the spacing W2 of the second side contour lines forms the width of the middle fin segment, and the spacing W3 of the third side contour lines forms the width of the lower fin segment. In the fin provided by this application, W2 ≥ W1, and W2 > W3. It is evident that the width of the middle fin segment is relatively larger than that of the lower fin segment. This allows the shape of the heat exchanger fins to match the uneven distribution of air velocity within the duct, thereby improving the heat exchanger's heat exchange efficiency.

[0023] The above general description and the description below are exemplary and illustrative only and are not intended to limit this application. Attached Figure Description

[0024] One or more embodiments are illustrated by way of example with reference to the accompanying drawings. These illustrations and drawings do not constitute a limitation on the embodiments. Elements having the same reference numerals in the drawings are shown as similar elements. The drawings are not to be scaled. And wherein: Figure 1 This is a schematic diagram of the structure of a fin provided in an embodiment of this disclosure; Figure 2 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 3 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 4 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 5 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 6 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 7 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 8 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 9 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 10 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 11 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 12 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 13 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 14 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 15 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 16 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 17 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 18 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 19 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 20 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 21 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 22 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 23 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 24 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 25 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 26 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 27 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 28This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 29 This is a schematic diagram of another fin structure provided in an embodiment of this disclosure; Figure 30 This is a schematic diagram of the structure of an indoor air conditioner unit provided in an embodiment of this disclosure; Figure 31 This is a schematic diagram of another air conditioner indoor unit provided in an embodiment of this disclosure; Figure 32 yes Figure 31 Enlarged view of a selected portion; Figure 33 This is a velocity distribution cloud map of the heat exchanger; Figure 34 This is a velocity distribution cloud map of a C-fin heat exchanger; Figure 35 This is a velocity distribution cloud map of a straight-edged finned heat exchanger provided in an embodiment of this disclosure; Figure 36 This is a pressure distribution cloud map of a C-fin heat exchanger; Figure 37 This is a pressure distribution cloud map of a heat exchanger with straight-edged fins provided in an embodiment of this disclosure; Figure 38 This is a schematic diagram of the structure of an air conditioner provided in an embodiment of this disclosure; Figure 39 This is a schematic diagram of the angles corresponding to the windward profile lines provided in the embodiments of this disclosure; Figure 40 This is a schematic diagram of the volute structure provided in an embodiment of this disclosure; Figure 41 This is a schematic diagram of the structure of the fins provided in the embodiments of this disclosure, wherein (a) is a schematic diagram of the windward side outline, and (b) is a schematic diagram of the heat transfer unit of each fin segment; Figure 42 This is a schematic diagram of the characteristic parameters of the bridge plate structure provided in the embodiments of this disclosure; Figure 43 This is a schematic diagram of the characteristic parameters of the louver structure provided in the embodiments of this disclosure; Figure 44 This is a schematic diagram of the characteristic parameters of the louver structure provided in the embodiments of this disclosure; Figure 45 This is a schematic diagram of the drag coefficient of each wing segment provided in the embodiments of this disclosure; Figure 46 This is a schematic diagram of another drag coefficient of each wing segment provided in the embodiments of this disclosure, wherein (a) is a schematic diagram of the drag coefficients corresponding to the two drag zones on the upper wing segment, and (b) is a schematic diagram of the drag coefficients corresponding to the two drag zones on the lower wing segment.

[0025] Figure label: 1: Upper wing segment; 11: First side profile; 111: First leeward side profile; 112: First windward side profile; 101: First upper heat exchange hole; 102: Second upper heat exchange hole; 103: Third upper heat exchange hole; 104: Windward edge; 105: Leeward edge; 2: Middle wing segment; 21: Second side profile; 211: Second leeward side profile; 212: Second windward side profile; 201: First middle heat exchange hole; 202: Second middle heat exchange hole; 203: Third middle heat exchange hole; 3: Lower wing segment; 31: Third lateral outline; 311: Third leeward side outline; 312: Third windward side profile line; 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 plate; 412: Second diffuser plate; 413: Third diffuser plate; 414: Fourth diffuser plate; 415: Fifth diffuser plate; 416: Sixth diffuser plate; 417: Receiving cavity; 4171: Outlet of the receiving cavity; 418: Axis of the volute; 441: Outlet of the first air outlet; 451: Outlet of the second air outlet; 5: Indoor fan; 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 profile; 642: Leeward side profile; 65: Bridge structure; 651: Bridge top wall; 652: Bridge side wall; 66: Louver structure; 661: Window top wall; 662: Window side wall. Detailed Implementation

[0026] To provide a more detailed understanding of the features and technical content of the embodiments of this disclosure, the implementation of the embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. The accompanying drawings are for illustrative purposes only and are not intended to limit the embodiments of this disclosure. In the following technical description, for ease of explanation, several details are used to provide a full understanding of the disclosed embodiments. However, one or more embodiments may still be implemented without these details. In other cases, well-known structures and devices may be simplified in their depiction to simplify the drawings.

[0027] The terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this disclosure are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this disclosure described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion.

[0028] In this disclosure, the terms "upper," "lower," "inner," "middle," "outer," "front," and "rear," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for better description of the embodiments of this disclosure and their implementations, and are not intended to limit the indicated devices, elements, or components to having a specific orientation, or to require them to be constructed and operated in a specific orientation. Furthermore, some of the aforementioned terms may be used to indicate other meanings besides orientation or positional relationship; for example, the term "upper" may in some cases indicate a dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in the embodiments of this disclosure according to the specific circumstances.

[0029] Furthermore, the terms "set up," "connect," and "fix" should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in the embodiments of this disclosure according to the specific circumstances.

[0030] Unless otherwise stated, the term "multiple" means two or more.

[0031] In this embodiment of the disclosure, the character " / " indicates that the objects before and after it are in an "or" relationship. For example, A / B means: A or B.

[0032] 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.

[0033] It should be noted that, unless otherwise specified, the embodiments and features described in the present disclosure can be combined with each other.

[0034] This disclosure provides a heat exchanger with arc-shaped fins. Optionally, a heat exchanger with arc-shaped fins may also be referred to as a heat exchanger.

[0035] Optionally, the heat exchanger with arc-shaped fins includes fins and heat exchange tubes passing through the fins. 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 parallel straight first side profile lines 11 spaced W1 apart. The middle fin segment 2 is located below the upper fin segment 1 and is bent and connected to it. The middle fin segment 2 includes parallel straight second side profile lines 21 spaced W2 apart. The lower fin segment 3 is located below the middle fin segment 2 and is bent and connected to it. The lower fin segment 3 includes parallel straight third side profile lines 31 spaced W3 apart, where W2 ≥ W1 and W2 > W3. Figure 1 and Figure 2 As shown.

[0036] It is understood that the upper wing segment 1, the middle wing segment 2, and the lower wing segment 3 are arranged in an upper, middle, and lower configuration when the fin is in use. Optionally, the upper wing segment 1, the middle wing segment 2, and the lower wing segment 3 of the fin are integrally formed.

[0037] The spacing W1 of the first side contour lines 11 can be understood as the width of the upper fin segment 1. Similarly, the spacing W2 of the second side contour lines 21 is the width of the middle fin segment 2, and the spacing W3 of the third side contour lines 31 is the width of the lower fin segment 3. In this 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; W2 > W3, that is, the width of the middle fin segment 2 is greater than the width of the lower fin segment 3. This makes the shape of the fins match the uneven distribution of the air velocity generated by the indoor fan in the air duct, thereby improving the heat exchange efficiency of the heat exchanger.

[0038] Existing type-I finned heat exchangers exhibit uneven airflow distribution during heat exchange, with high airflow velocity at the top and low airflow velocity at the bottom. In contrast, the straight-edge finned heat exchanger provided in this embodiment effectively guides the airflow from the high-velocity central area to both the top and bottom sections, resulting in a more uniform overall airflow velocity distribution. This uniform airflow distribution improves the uniformity of the heat exchange field and enhances the overall heat exchange performance of the heat exchanger.

[0039] Fins with arc-shaped side profiles can be called C-type fins. Existing C-type fin heat exchangers have a large flow stagnation zone in the middle on the leeward side, resulting in uneven outlet air velocity distribution. Compared with existing C-type fin heat exchangers, the straight-edge fin heat exchanger provided in this embodiment effectively guides the incoming flow in the high-velocity zone in the middle to both the upper and lower parts, significantly reducing the flow stagnation zone in the middle on the leeward side and resulting in a more uniform outlet air velocity distribution. Figure 34 As shown in the velocity distribution cloud map, it can be seen that the C-shaped finned heat exchanger has a large flow stagnation zone in the middle of the leeward side. Figure 35 To and Figure 34Velocity distribution contour plot of a straight-edged finned heat exchanger measured at the same wind speed. From Figure 35 As can be seen, the flow stagnation zone on the leeward side of the heat exchanger with straight-edged fins is significantly reduced.

[0040] Figure 36 This is a pressure distribution contour map of a C-fin heat exchanger. Figure 37 This is a pressure distribution cloud diagram of the straight-edged finned heat exchanger provided in this embodiment. It can be measured that the pressure drop on the windward and leeward sides of the existing C-type finned heat exchanger is 278 Pa, while the pressure drop on the windward and leeward sides of the straight-edged finned heat exchanger provided in this embodiment is 271 Pa. It can be seen that the pressure drop of the existing C-type heat exchanger is relatively large. Compared with the C-type heat exchanger, the pressure drop of the straight-edged finned heat exchanger provided in this embodiment is reduced by 2.5%.

[0041] Alternatively, 1 ≤ W2 / W1 ≤ 2; and / or, 1 ≤ W2 / W3 ≤ 2.

[0042] Optionally, 1 < W2 / W1 ≤ 2, 1 < W2 / W3 ≤ 2. In this 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 effect 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.

[0043] Optionally, the first side profile 11 includes a first leeward side profile 111 and a first windward side profile 112; the second side profile 21 includes a second leeward side profile 211 and a second windward side profile 212; and the third side profile 31 includes a third leeward side profile 311 and a third windward side profile 312. Let the midpoint of the line connecting the upper endpoint of the first windward side profile 112 and the lower endpoint of the third windward side profile 312 be a reference point F. Let the first angle of the second leeward side profile 211 corresponding to reference point F be d1; the second angle of the first leeward side profile 111 corresponding to reference point F be d2; and the third angle of the third leeward side profile 311 corresponding to reference point F be d3, where 5°≤d1≤160°; and / or 10°≤d2≤100°; and / or 15°≤d3≤100°. Figure 7 and Figure 8 As shown.

[0044] The first leeward side profile line 111, the second leeward side profile line 211, and the third leeward side profile line 311 are connected in sequence to obtain the leeward side profile line of the fin; similarly, the first windward side profile line 112, the second windward side profile line 212, and the third windward side profile line 312 are connected in sequence to obtain the windward side profile line of the fin.

[0045] Reference point F is the midpoint of the line connecting the upper endpoint G3 of the first windward profile line 112 and the lower endpoint G4 of the third windward profile line 312.

[0046] The first angle d1 is the angle between the two lines connecting the reference point F to the two endpoints of the second leeward profile 211. When the line connecting the second leeward profile 211 and the first leeward profile 111 is an arc, and the line connecting the second leeward profile 211 and the third leeward profile 311 is an arc, the extension of the second leeward profile 211 intersects the extension of the first leeward profile 111 at the first intersection point, and the extension of the second leeward profile 211 intersects the extension of the third leeward profile 311 at the second intersection point. The angle between the two lines connecting the reference point F to the first intersection point and the second intersection point is taken as the first angle d1.

[0047] Similarly, the second angle d2 is the angle between the two lines connecting the reference point F to the two endpoints of the first leeward profile 111. When the line connecting the second leeward profile 211 and the first leeward profile 111 is an arc, the angle between the two lines connecting the reference point F to the first intersection point and the upper endpoint of the first leeward profile 111 is taken as the second angle d2.

[0048] Similarly, the third angle d3 is the angle between the two lines connecting the reference point F to the two endpoints of the third leeward profile 311. When the angle between the second leeward profile 211 and the third leeward profile 311 is an arc, the angle between the two lines connecting the reference point F to the second intersection point and the lower endpoint of the third leeward profile 311 is taken as the third angle d3.

[0049] Optionally, 30°≤d1≤160°; and / or, 15°≤d2≤100°; and / or, 15°≤d3≤100°.

[0050] Optionally, when the fin shape is vertically symmetrical, the first angle d1 corresponding to reference point F of the second leeward profile 211 can be appropriately reduced, for example, 5°≤d1≤70°. In this case, the length of the second leeward profile 211 decreases, which is beneficial to improving the effect of the middle fin segment 2 in guiding airflow to the upper fin segment 1 and the lower fin segment 3 respectively. Optionally, 10°≤d1≤40°, or 25°≤d1≤35°. Optionally, compared with the first angle d1, the second angle d2 corresponding to reference point F of the first leeward profile 111 can be appropriately increased, for example, 15°≤d2≤85°. In this case, the corresponding increase in the length of the first leeward profile 111 is beneficial to improving the reception of airflow diverted from the middle fin segment 2 by the upper fin segment 1. Optionally, 35°≤d2≤65°, or 40°≤d2≤55°. Similarly, compared to the first leeward profile d1, the third leeward profile 311 corresponding to the reference point F can have its third leeward profile d3 appropriately increased, for example, 25°≤d3≤95°. In this case, the corresponding increase in the length of the third leeward profile 311 is beneficial for improving the lower wing segment 3's reception of the airflow diverted from the middle wing segment 2. Optionally, 45°≤d3≤75°, or 40°≤d3≤60°. Optionally, the length of the third leeward profile 311 is slightly greater than the length of the first leeward profile 111. Optionally, the difference between d3 and d1 is greater than 5° and less than or equal to 10°. Figure 7 As shown.

[0051] Optionally, when the fin shape is vertically symmetrical, 0.4 ≤ d1 / d2 ≤ 0.6; and / or, 0.3 ≤ d1 / d3 ≤ 0.5. When the length of the second leeward profile 211 decreases, the first angle d1 corresponding to the second leeward profile 211 also decreases accordingly. In this embodiment, 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 profile 211 is smaller than the length of the first leeward profile 111, thereby improving the airflow guiding effect of the middle fin segment 2 to the upper fin 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 profile 211 is smaller than the length of the third leeward profile 311, thereby improving the airflow guiding effect of the middle fin segment 2 to the lower fin segment 3. Optionally, d1 / d2 > d1 / d3.

[0052] The symmetrical shape of the fins can be understood as follows: the angle s1 between the first leeward profile line 111 and the horizontal line, the angle s3 between the third leeward profile line 311 and the horizontal line, s1=s3; the angle s2 between the first windward profile line 112 and the horizontal line, and the angle s4 between the third windward profile line 312 and the horizontal line, s2=s4. In this case, the curvature of the upper fin segment 1 is the same as the curvature of the lower fin segment 3. For example... Figure 3 As shown.

[0053] Optionally, 115° < d1 + d2 + d3 < 145°, or 120° < d1 + d2 + d3 < 130°.

[0054] Optionally, when the fin shape is asymmetrical, the angle s1 between the first leeward profile line 111 and the horizontal line is not equal to the angle s3 between the third leeward profile line 311 and the horizontal line. Optionally, s1 > s3, and the length of the first leeward profile line 111 is less than the length of the third leeward profile line 311. Figure 4 As shown.

[0055] Optionally, when the fin shape is asymmetrical, 10°≤d1≤80°, which is beneficial to improving the effect of the middle fin segment 2 in guiding airflow to the upper fin segment 1. Optionally, 20°≤d1≤50°, or 35°≤d1≤40°. Optionally, compared with the first angle d1, the second angle d2 corresponding to the reference point F of the first leeward side profile 111 can be appropriately reduced, for example, 5°≤d2≤75°, which is beneficial to improving the upper fin segment 1 in receiving airflow diverted from the middle fin segment 2. Optionally, 12°≤d2≤42°, or 25°≤d2≤35°. The third angle d3 corresponding to the reference point F of the third leeward side profile 311 can be appropriately increased, for example, 20°≤d3≤100°. In this case, the length of the third leeward side profile 311 is relatively increased, which is beneficial to improving the lower fin segment 3 in receiving airflow diverted from the middle fin 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 As shown.

[0056] Optionally, when the fin shape is asymmetrical, 1.2 ≤ d1 / d2 ≤ 1.4, and / or; 0.45 ≤ d1 / d3 ≤ 0.7. The second angle d2 corresponding to the first leeward profile 111 is relatively smaller than the first angle d1 corresponding to the second leeward profile 211. This helps improve the airflow guiding effect from the middle fin segment 2 to the upper fin segment 1 in asymmetrical fins. Optionally, d1 / d2 can be 1.2, 1.3, or 1.4. The third angle d3 corresponding to the third leeward profile 311 is relatively larger than the first angle d1 corresponding to the second leeward profile 211. This helps improve the airflow guiding effect from the middle fin segment 2 to the lower fin segment 3 in irregular fins. Optionally, d1 / d3 can be 0.45, 0.5, 0.55, 0.6, 0.65, or 0.7.

[0057] Optionally, the angle between the first windward profile line 112 and the second windward profile line 212 is the first plate segment angle α, and the angle between the second windward profile line 212 and the third windward profile line 312 is the second plate segment angle β, wherein the first plate segment angle α is greater than or equal to 100°; and / or, the second plate segment angle β is greater than or equal to 100°. Figure 5 and Figure 6 As shown.

[0058] It is understandable that when the first windward side profile line 112 and the second windward side profile line 212 intersect directly, the included angle formed by the intersection of these two side profile lines is the first segment included angle α; when the first windward side profile line 112 and the second windward side profile line 212 are connected by arcs and do not intersect directly, the included angle formed by the intersection of the extension of the first windward side profile line 112 and the extension of the second windward side profile line 212 is the first segment included angle α. Similarly, when the second windward side profile line 212 and the third windward side profile line 312 intersect directly, the included angle formed by the intersection of these two side profile lines is the second segment included angle β; when the second windward side profile line 212 and the third windward side profile line 312 are connected by arcs and do not intersect directly, the included angle formed by the intersection of the extension of the second windward side profile line 212 and the extension of the third windward side profile line 312 is the second segment included angle β.

[0059] Optionally, 100°≤α≤170°; and / or, 100°≤β≤170°.

[0060] Optionally, when the fins are vertically symmetrical, 120°≤α≤135°, thus improving the airflow diversion effect from 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 airflow diversion effect from 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 As shown.

[0061] Optionally, when the fins are asymmetrical, 127°≤α≤178°; and / or, 95°≤β≤150°; alternatively, 140°≤α≤170°; and / or, 110°≤β≤143°; alternatively, 150°≤α≤160°, thus improving the wind-splitting effect from the middle fin segment 2 to the upper fin segment 1. Optionally, α can be 150°, 155°, 157°, or 160°; similarly, 120°≤β≤135°, thus improving the wind-splitting effect from the middle fin segment 2 to the lower fin segment 3. Optionally, β can be 120°, 125°, 128°, 130°, or 135°. Optionally, α>β; alternatively, the difference between α and β is greater than 20° and less than or equal to 30°. Figure 6 As shown.

[0062] Optionally, the fourth angle of the second windward profile 212 corresponding to reference point F is e1, the fifth angle of the first windward profile 112 corresponding to reference point F is e2, and the sixth angle of the third windward profile 312 corresponding to reference point F is e3, wherein 30°≤e1≤160°; and / or, 15°≤e2≤100°; and / or, 15°≤e3≤100°. Figure 9 and Figure 10 As shown.

[0063] It is understandable that the fourth angle e1 is the angle between the two lines connecting the reference point F to the two endpoints of the second windward profile 212. When the line connecting the second windward profile 212 and the first windward profile 112 is an arc, and the line connecting the second windward profile 212 and the third windward profile 312 is an arc, then the extension of the second windward profile 212 intersects the extension of the first windward profile 112 at the third intersection point, and the extension of the second windward profile 212 intersects the extension of the third windward profile 312 at the fourth intersection point. The angle between the two lines connecting the reference point F to the third intersection point and the fourth intersection point is taken as the fourth angle e1.

[0064] Similarly, the fifth angle e2 is the angle between the two lines connecting the reference point F to the two endpoints of the first windward profile 112. When the line connecting the second windward profile 212 and the first windward profile 112 is an arc, the angle between the two lines connecting the reference point F to the third intersection point and the upper endpoint of the first windward profile 112 is taken as the fifth angle e2.

[0065] Similarly, the sixth angle e3 is the angle between the two lines connecting the reference point F to the two endpoints of the third windward profile 312. When the line connecting the second windward profile 212 and the third windward profile 312 is an arc, the angle between the two lines connecting the reference point F to the fourth intersection point and the lower endpoint of the third windward profile 312 is taken as the sixth angle e3.

[0066] Optionally, when the fin shape is vertically symmetrical, the fourth angle e1 of the second windward profile line 212 corresponding to reference point F can be appropriately reduced, for example, 15°≤e1≤80°. In this case, the length of the second windward profile line 212 is correspondingly reduced, which is beneficial to improving the effect of the middle fin segment 2 in guiding airflow to the upper fin segment 1 and the lower fin segment 3 respectively. Optionally, 27°≤e1≤67°. Optionally, compared with the fourth angle e1, the fifth angle e2 of the first windward profile line 112 corresponding to 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 profile line 112 is correspondingly increased, which is beneficial to improving the reception of airflow diverted from the middle fin segment 2 by the upper fin segment 1. Optionally, 60°≤e2≤70°. Similarly, compared to the fourth angle e1, the sixth angle e3 corresponding to reference point F of the third windward profile line 312 can be appropriately increased, for example, 50°≤e3≤100°. In this case, the relatively increased length of the third windward profile line 312 is beneficial for improving the reception of airflow diverted from the middle wing segment 2 by the lower wing segment 3. Optionally, 62°≤e3≤92°, or 62°≤e3≤70°. Optionally, the length of the third windward profile line 312 is slightly greater than the length of the first windward profile line 112. Optionally, the difference between e3 and e2 is greater than 0.5° and less than or equal to 5°. Figure 9 As shown.

[0067] Optionally, when the shape of the fins is symmetrical, 0.3≤e1 / e2≤1; and / or, 0.25≤e1 / e3≤0.85. When the length of the second windward profile 212 is relatively small, the fourth angle e1 corresponding to the second windward profile 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. This makes the fourth angle e1 smaller than the fifth angle e2. Correspondingly, the length of the second windward profile 212 is smaller than the length of the first windward profile 112, thereby improving the airflow guiding effect from the middle wing segment 2 to 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. This makes the fourth angle e1 smaller than the sixth angle e3. Correspondingly, the length of the second windward profile 212 is smaller than the length of the third windward profile 312, thereby improving the airflow guiding effect from the middle wing segment 2 to the lower wing segment 3. Optionally, e1 / e2 > e1 / e3.

[0068] Optionally, when the fin shape is asymmetrical, s2≠s4, or s2>s4, and the length of the first windward profile 112 is less than the length of the third windward profile 312, e2≠e3. Optionally, 30°≤e1≤100°, which is beneficial to improving the effect of the middle fin segment 2 in guiding airflow to the upper fin segment 1. Optionally, 50°≤e1≤80°, or 70°≤e1≤80°. Optionally, compared with the fourth angle e1, the fifth angle e2 corresponding to the reference point F of the first windward profile 112 can be appropriately reduced, for example, 5°≤e2≤70°, which is beneficial to improving the upper fin segment 1 in receiving airflow diverted from the middle fin segment 2. Optionally, 18°≤e2≤48°, or 30°≤e2≤40°. The sixth angle e3 corresponding to reference point F of the third windward profile line 312 can be appropriately increased, for example, 45°≤e3≤100°. In this case, the relatively increased length of the third windward profile line 312 is beneficial for improving the reception of airflow diverted from the middle wing segment 2 by the lower wing segment 3. 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 As shown.

[0069] Optionally, when the fin shape is asymmetrical, 1.7 ≤ e1 / e2 ≤ 2.3; and / or, 0.5 ≤ e1 / e3 ≤ 1.2. The fifth angle e2 corresponding to the first windward side profile 112 is relatively smaller than the fourth angle e1 corresponding to the second windward side profile 212. This helps improve the airflow guiding effect from the middle fin segment 2 to the upper fin segment 1 in irregular fins. Optionally, e1 / e2 can be 1.7, 1.8, 1.9, 2.0, 2.2, or 2.3. Optionally, 0.5 ≤ e1 / e3 < 1, and the sixth angle e3 corresponding to the third windward side profile 312 is relatively larger than the fourth angle e1 corresponding to the second windward side profile 212. This helps improve the airflow guiding effect from the middle fin segment 2 to the lower fin segment 3 in irregular fins. Optionally, e1 / e3 can be 0.5, 0.6, 0.7, 0.8, 0.9, or 0.95. Optionally, e1 = e3.

[0070] Optionally, L is the length of the second windward profile 212, and L0 is the length of the second leeward profile 211, wherein 15mm ≤ L ≤ 75mm, and / or 15mm ≤ L0 ≤ 75mm; further, 30mm ≤ L ≤ 60mm, and / or 30mm ≤ L0 ≤ 60mm. Figure 11 and Figure 12 As shown. Optionally, L can be 30mm, 40mm, 50mm or 60mm; optionally, L0 can be 30mm, 40mm, 50mm or 60mm.

[0071] Optionally, L3 is the length of the first windward profile 112, and L4 is the length of the first leeward profile 111, wherein 40mm≤L3≤100mm, and / or 50mm≤L4≤110mm; further, 55mm≤L3≤85mm, and / or 65mm≤L4≤95mm. Optionally, L3 can be 55mm, 65mm, 75mm, or 85mm; optionally, L4 can be 65mm, 75mm, 85mm, or 95mm.

[0072] Optionally, L5 is the length of the third windward profile line 312, and L6 is the length of the third leeward profile line 311, wherein 55mm≤L5≤115mm, and / or 70mm≤L6≤130mm; further, 70mm≤L5≤100mm, and / or 85mm≤L6≤115mm. Optionally, L5 can be 70mm, 80mm, 90mm, or 100mm; optionally, L6 can be 85mm, 95mm, 105mm, or 115mm.

[0073] Optionally, when the fins are irregular fins, 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 As shown. Optionally, L can be 47mm, 57mm, 67mm or 77mm; L0 can be 47mm, 57mm, 67mm or 77mm; L3 can be 37mm, 47mm, 57mm or 67mm; L4 can be 29mm, 39mm, 49mm or 59mm; L5 can be 67mm, 77mm, 87mm or 97mm; L6 can be 81mm, 91mm or 101mm.

[0074] Optionally, 1.3 ≤ W2 / W1 ≤ 1.7; and / or, 1.3 ≤ W2 / W3 ≤ 1.7. Optionally, W2 / W1 can be 1.3, 1.4, 1.5, 1.6 or 1.7; similarly, W2 / W3 can be 1.3, 1.4, 1.5, 1.6 or 1.7.

[0075] Optionally, when the fins are irregular fins, 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; W2 / W3 can be 1.5, 1.6, 1.7, 1.8, or 1.9.

[0076] Optionally, 22mm ≤ W2 ≤ 66mm; further, 33mm ≤ W2 ≤ 55mm. Optionally, W2 can be 33mm, 44mm, or 55mm.

[0077] Optionally, 14mm ≤ W1 ≤ 53mm; further, 22mm ≤ W1 ≤ 44mm. Optionally, W1 can be 22mm, 33mm, or 44mm.

[0078] Optionally, 14mm ≤ W3 ≤ 53mm; further, 22mm ≤ W3 ≤ 44mm. Optionally, W3 can be 22mm, 33mm, or 44mm.

[0079] Optionally, when the fins are irregular fins, 20mm ≤ W2 ≤ 70mm; further, 33mm ≤ W2 ≤ 60mm. Optionally, 20mm ≤ W1 ≤ 60mm; further, 25mm ≤ W1 ≤ 55mm. Optionally, 15mm ≤ W3 ≤ 40mm; further, 10mm ≤ W3 ≤ 35mm. Optionally, W2 can be 33mm, 40mm, 50mm, or 60mm; W1 can be 25mm, 35mm, 45mm, or 55mm; W3 can be 10mm, 20mm, 30mm, or 35mm.

[0080] Optionally, the central fin segment 2 is provided with a plurality of first heat exchange tube holes for the heat exchange tubes to pass through, and the plurality of first heat exchange tube holes form a column of first heat exchange tube holes arranged along the second windward side contour line 212 or the second leeward side contour line 211. In the same column, the distance between two adjacent first heat exchange tube holes is b1; the distance between two adjacent first heat exchange tube holes located in two adjacent columns is m1.

[0081] Similarly, the upper fin segment 1 is provided with a plurality of second heat exchange tube holes for the heat exchange tubes to pass through. The plurality of second heat exchange tube holes form a column of second heat exchange tube holes arranged along the first windward side contour line 112 or the first leeward side contour line 111. In the same column, the distance between two adjacent second heat exchange tube holes is b2; the distance between two adjacent second heat exchange tube holes located in two adjacent columns is m2.

[0082] Similarly, the lower fin segment 3 is provided with multiple third heat exchange tube holes for the insertion of heat exchange tubes. These multiple third heat exchange tube holes form a "column" arrangement along the third windward profile line 312 or the third leeward profile line 311. Within the same column, the distance between two adjacent third heat exchange tube holes is b3; the distance between two adjacent third heat exchange tube holes located in two adjacent columns is m3. For example... Figure 13 and Figure 14 As shown.

[0083] 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.

[0084] Optionally, when the fins are irregular fins, b1 / b2 = 0.8-1.6; alternatively, b1 / b2 = 0.9-1.3.

[0085] b1 / b3 = 0.9-1.5; optionally, b1 / b3 = 1-1.4. Optionally, b1 / b2 can be 0.9, 1, 1.1, 1.2 or 1.3; b1 / b3 can be 1, 1.1, 1.2, 1.3 or 1.4.

[0086] Optionally, m1 / m2 = 0.8-1.2; further, m1 / m2 = 0.9-1.1. Optionally, m1 / m3 = 0.8-1.2; further, m1 / m3 = 0.9-1.1. Optionally, m1 / m2 can be 0.9, 1, or 1.1; similarly, m1 / m3 can be 0.9, 1, or 1.1.

[0087] 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; m1 / m3 can be 0.9, 1, 1.1, 1.2, 1.3 or 1.4.

[0088] It is understandable that the first leeward side profile 111 can also be called the upper leeward edge; the first windward side profile 112 can also be called the upper windward edge; the second leeward side profile 211 can also be called the middle leeward edge; the second windward side profile 212 can also be called the middle windward edge; the third leeward side profile 311 can also be called the lower leeward edge; and the third windward side profile 312 can also be called the lower windward edge.

[0089] Optionally, the heat exchanger with arc-shaped fins includes fins and heat exchange tubes passing 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 end point G1 located on the leeward side; the middle fin segment 2 is located at the lower part of the upper fin segment 1, and a first connection position is provided between the upper fin segment 1 and the middle fin segment 2; the lower fin segment 3 is located at the lower part of the middle fin segment 2, and a second connection position is provided between the middle fin segment 2 and the lower fin segment 3. The perpendicular line from the first end point G1 falls into the middle fin segment 2 of the fin.

[0090] The heat exchanger fins include at least an upper fin segment 1, a middle fin segment 2, and a lower fin segment 3, which are connected sequentially from top to bottom. Optionally, the upper fin segment 1, the middle fin segment 2, and the lower fin segment 3 can be manufactured in a single integral form.

[0091] The heat exchange tubes of the heat exchanger are inserted into the fins. Multiple heat exchange tubes can be connected to form a heat exchange branch, or they can form two or more heat exchange branches.

[0092] The upper wing segment 1 includes a first endpoint G1 located on the leeward side. The first endpoint G1 can be understood as the uppermost endpoint of the upper leeward edge of the upper wing segment 1, such as... Figure 15 As shown.

[0093] The perpendicular line from the first endpoint G1 falls into the middle segment 2 of the fin. This can be understood as follows: drawing a perpendicular line from the first endpoint G1, the resulting perpendicular line will fall into the middle segment 2 of the fin. Figure 15 As shown.

[0094] 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. A first horizontal line p passing through the first midpoint D1 intersects the middle windward edge 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 10mm≤L1≤55mm.

[0095] like Figure 15 As shown, the middle wing segment 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 the first midpoint D1, and the 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.

[0096] The distance between D1 and D3 is L1, optionally 10mm≤L1≤55mm. Optionally, the value of L1 can be 10mm, 20mm, 30mm, 40mm, 50mm, or 55mm. In this embodiment, the perpendicular line from the first endpoint G1 intersects the first horizontal line p at the third point D3, and there is a certain distance between D3 and D1. This improves the matching degree between the shape of the fins and the unevenness of the air velocity in the duct, thereby improving the heat exchange efficiency of the heat exchanger.

[0097] Optionally, the distance between D2 and D3 is L2, and 2mm≤L2≤40mm.

[0098] 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 this embodiment of the present disclosure, there is a certain distance between D3 and D2, which improves the matching degree between the shape of the fins and the unevenness of the air velocity in the air duct, thereby improving the heat exchange efficiency of the heat exchanger.

[0099] Optionally, L1 ≤ L2.

[0100] For example, L1 is 30mm and L2 is 35mm; or, L1 is 30mm and L2 is 40mm.

[0101] Optionally, the length of the leeward edge of the middle wing segment 2 is L, where 0.1≤L1 / L≤1.5.

[0102] Optionally, the ratio of L1 to L can be 0.1, 0.2, 0.3, 0.5, 0.8, 1.0, or 1.5.

[0103] Optionally, L1 < L. Optionally, the value of L can be 20-100 mm. Optionally, 0.3 ≤ L1 / L ≤ 0.6.

[0104] Optionally, 0.1 ≤ L2 / L ≤ 1.5.

[0105] Optionally, the ratio of L2 to L can be 0.1, 0.2, 0.3, 0.5, 0.8, 1.0, or 1.5.

[0106] Optionally, L2 < L. Optionally, 0.4 ≤ L1 / L ≤ 0.9. For example... Figure 16 As shown.

[0107] The heat exchanger with arc-shaped fins provided in this embodiment improves the matching degree between the shape of the fins and the unevenness of the air velocity in the air duct, thereby improving the heat exchange efficiency of the heat exchanger.

[0108] Optionally, the upper wing segment 1, the middle wing segment 2, and the lower wing segment 3 constitute an arc-shaped wing.

[0109] In this embodiment of the present disclosure, the upper wing segment 1, the middle wing segment 2, and the lower wing segment 3 generally constitute an arc-shaped wing. For example... Figures 1 to 29 As shown. 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 arc shape. Optionally, the middle wing segment 2 is arranged vertically.

[0110] 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.

[0111] 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 As shown. Alternatively, the width of the upper wing segment 1 is greater than the width of the lower wing segment 3, as shown. Figures 15 to 17 As shown.

[0112] Optionally, the length of the middle wing segment 2 is greater than or equal to the width of the middle wing segment 2. The length of the middle wing segment 2 may also be less than the width of the middle wing segment 2.

[0113] It is understandable that the widths of the upper wing segment 1, the middle wing segment 2, and the lower wing segment 3 can be... Figure 15 The measurements were taken in the horizontal direction shown. 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 or leeward edges of the corresponding wing segments.

[0114] 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.

[0115] The extension length of the upper wing segment 1 can be less than the extension length of the lower wing segment 3, such as... 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 arcuate 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, such as... 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 arc-shaped structure.

[0116] The upper wing segment 1 includes an upper leeward edge, and the lower wing segment 3 includes a lower leeward edge. 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.

[0117] 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 As shown. Alternatively, the angle between the upper leeward edge and the middle leeward edge can also be equal to the angle between the lower leeward edge and the middle leeward edge, as shown. Figure 18 As shown.

[0118] 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.

[0119] 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 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 constitute a wing with at least six right-angled sides.

[0120] Optionally, the first connection between the upper wing segment 1 and the middle wing segment 2 can be an arc-shaped connection or a straight connection structure. Similarly, the second connection between the middle wing segment 2 and the lower wing segment 3 can be an arc-shaped connection or a straight connection structure.

[0121] Optionally, the upper wing segment 1, the first connecting position, the middle wing segment 2, the second connecting position, and the lower wing segment 3 are integrally formed.

[0122] Optionally, the windward edge 104 of the fin coincides with the leeward edge 105. This allows multiple fins to be continuously formed on a single substrate, reducing the scrap rate during fin processing. Figure 28 and Figure 29 As shown.

[0123] Optionally, the vertical line of the first endpoint G1 falls into the area on the windward side of the middle wing segment 2 of the fin.

[0124] In this embodiment of the disclosure, the vertical line of the first endpoint G1 falls into the region on the windward side of the middle wing segment 2 of the fin, such as... Figure 18 As shown. Optionally, the wing segment consisting of the upper wing segment 1, the middle wing segment 2, and the lower wing segment 3 can be roughly in a regular arc shape.

[0125] Optionally, the distance between D1 and D3 is L1, and 30mm≤L1≤100mm.

[0126] In this embodiment, there is a certain distance between D1 and D3. Optionally, the value of L1 can be 30mm, 40mm, 50mm, 60mm, 70mm, 80mm, 90mm, or 100mm. Furthermore, the distance L1 between D1 and D3 is greater than the width of the central wing segment 2. Optionally, the distance L1 between D1 and D3 is 1.1 to 1.5 times the width of the central wing segment 2. Figure 18 As shown.

[0127] Optionally, the distance between D2 and D3 is L2, and 2mm≤L2≤50mm.

[0128] In this embodiment, there is also a certain distance between D2 and D3. Optionally, the value of L2 can be 2mm, 10mm, 20mm, 30mm, 40mm, or 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 As shown.

[0129] Optionally, the length of the leeward edge of the middle wing segment 2 is L, where 0.5 ≤ L1 / L ≤ 3.

[0130] Optionally, the ratio of L1 to L is greater than 1. This increases the degree of bending or folding of the fins, improves the matching between the fin shape and the unevenness of the air velocity within the duct, and enhances the heat exchanger's efficiency. Optionally, 1 ≤ L1 / L ≤ 2. Figure 19 As shown.

[0131] Optionally, 0.1 ≤ L2 / L ≤ 2.

[0132] Optionally, the ratio between L2 and L is greater than 0.5. This increases the degree of bending or folding of the fins, improves the matching between the fin shape and the unevenness of the air velocity within the duct, and enhances the heat exchanger's heat exchange efficiency. Optionally, 0.5 ≤ L2 / L ≤ 1. For example... Figure 18 As shown.

[0133] This disclosure also provides a heat exchanger. For example... Figures 20 to 23 As shown.

[0134] Optionally, the heat exchanger includes fins and heat exchange tubes passing through the fins. 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 an upper leeward edge and an upper windward edge. The middle fin segment 2 is located 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 middle fin segment 2 includes a middle leeward edge and a middle windward edge. The lower fin segment 3 is located 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. The lower fin segment 3 includes a lower leeward edge and a lower windward edge. The extension line of the upper leeward edge intersects the extension line of the lower leeward edge at M1. The midpoint of the middle leeward edge is N1, and N1 is located above M1. Figure 20 As shown.

[0135] In this embodiment, the midpoint N1 of the middle leeward edge is located at the upper part of M1, where the extension lines of the upper leeward edge and the lower leeward edge intersect. Optionally, N1 and the aforementioned D1 can be the same location point.

[0136] Optionally, the vertical distance between N1 and M1 is 0.2 to 0.5 times the length L of the leeward edge of the middle wing segment 2.

[0137] Optionally, the extension line of the upper windward edge intersects the extension line of the lower windward edge at M2, and the midpoint of the middle windward edge is N2, wherein N2 is located at the upper part of M2.

[0138] In this embodiment, the midpoint N2 of the middle windward edge is located at the upper part of M2, where the extension lines of the upper and lower windward edges intersect. Optionally, N2 and the aforementioned D2 can be the same location point.

[0139] Optionally, the vertical distance between N2 and M2 is 0.2 to 0.5 times the length of the 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 As shown.

[0140] The heat exchanger provided in this embodiment improves the matching degree between the shape of the fins and the unevenness of the air velocity in the air duct, thereby improving the heat exchange efficiency of the heat exchanger.

[0141] Optionally, the line containing N1 and M1 is the first line, and the line containing M1 and M2 is the second line, wherein the angle between the first line and the second line is θ1, and 0°<θ1≤60°.

[0142] In this embodiment of the disclosure, the first straight line containing N1 and M1 forms a certain angle with the second straight line containing M1 and M2. Optionally, the angle θ1 can be 5°, 15°, 25°, 35°, 45°, 55° or 60°.

[0143] Optionally, 20° < θ1 ≤ 45°. For example... Figure 21 As shown.

[0144] Optionally, the line containing N2 and M2 is the third line, where the angle between the third line and the second line is θ2, and 0°<θ2≤60°.

[0145] In this embodiment of the disclosure, the third line containing N2 and M2 also forms a certain angle with the second line containing M1 and M2. Optionally, the angle θ2 can be 5°, 15°, 25°, 35°, 45°, 55° or 60°.

[0146] Optionally, 20° < θ2 ≤ 45°. For example... Figure 22 As shown.

[0147] Optionally, the angles θ1 and θ2 are equal.

[0148] Optionally, the line containing N1 and N2 is the fourth line, where the angle between the fourth line and the second line is θ3, and 0°≤θ3≤20°.

[0149] In this embodiment of the disclosure, the angle θ3 between the fourth line containing N1 and N2 and the second line containing M1 and M2 can be 0°, that is, the fourth line is parallel to the second line. Figure 23 As shown.

[0150] Optionally, the angle θ3 between the fourth line containing N1 and N2 and the second line containing M1 and M2 can be greater than 0° and less than or equal to 20°.

[0151] The heat exchanger provided in this embodiment improves the matching degree between the shape of the fins and the unevenness of the air velocity in the air duct, thereby improving the heat exchange efficiency of the heat exchanger.

[0152] This disclosure also provides a heat exchanger. For example... Figures 24 to 27 As shown.

[0153] Optionally, the heat exchanger includes fins and heat exchange tubes passing 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 an upper fin region formed by an upper leeward edge and an upper windward edge. The upper fin region includes a first upper heat exchange hole 101 near the middle fin region and near the upper leeward edge, and a second upper heat exchange hole 102 near the middle fin region and near the upper windward edge. The middle fin segment 2 is disposed below the upper fin segment 1. The middle fin segment 2 includes a middle fin region formed by a middle leeward edge and a middle windward edge. The middle fin region includes a first middle heat exchange hole 201 near the upper fin region and near the middle leeward edge, and a second middle heat exchange hole 202 near the upper fin region and near the middle windward edge. The lower fin segment 3 is disposed below the middle fin segment 2. The lower fin segment 3 includes a lower fin region formed by a lower leeward edge and a lower windward edge. Wherein, the straight line containing the first upper heat exchange hole 101 and the first middle heat exchange hole 201 is the first heat exchange hole straight line, the straight line containing 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 between the first heat exchange hole straight line and the second heat exchange hole straight line is β1, and 10°≤β1≤60°.

[0154] In this embodiment, the straight line containing 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 containing the second upper heat exchange hole 102 and the second middle heat exchange hole 202 is the second heat exchange hole straight line. The included 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°.

[0155] Optionally, the straight line connecting 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 connecting 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 As shown.

[0156] Optionally, the value of β1 can be 10°, 20°, 30°, 40°, 50° or 60°.

[0157] It is understandable that the boundary between the upper wing region formed by the upper wing segment 1 and the middle wing region formed by the middle wing segment 2 can be as follows: Figure 24 The upper dotted line in the diagram shows the boundary between the middle wing region formed by the middle wing segment 2 and the lower wing region formed by the lower wing segment 3. Figure 24 As shown by the lower dashed line in the image.

[0158] Understandably, when a heat exchange hole is located in both the upper fin area and the middle fin area, it can be classified as the upper fin area; similarly, when a heat exchange hole is located in both the middle fin area and the lower fin area, it can be classified as the middle fin area.

[0159] It is understood that heat exchange holes are through holes on the fins used to insert heat exchange tubes. Optionally, the diameter of the heat exchange holes can be adjusted according to the diameter of the heat exchange tubes. Optionally, when the diameters of multiple heat exchange tubes in the heat exchanger are all the same, the diameters of multiple heat exchange holes on the fins are also the same.

[0160] The heat exchanger provided in this embodiment improves the matching degree between the shape of the fins and the unevenness of the air velocity in the air duct, thereby improving the heat exchange efficiency of the heat exchanger.

[0161] Optionally, the straight line between the first central heat exchange hole 201 and the second central heat exchange hole 202 is the third heat exchange hole straight line. The central fin region 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.

[0162] Similarly, the straight line between the center of the first central heat exchange hole 201 and the center of the second central heat exchange hole 202 can be taken as the straight line of the third heat exchange hole.

[0163] like Figure 25 As shown, the third central heat exchange hole 203 is located at the lower part of the straight line of the third heat exchange hole, or the third central heat exchange hole 203 is located at the upper part of the straight line of the third heat exchange hole. It can be understood that the first central heat exchange hole 201, the second central heat exchange hole 202 and the third central heat exchange hole 203 are not on the same straight line.

[0164] Optionally, the upper fin region also includes a third upper heat exchange hole 103 near the first upper heat exchange hole 101, wherein the third upper heat exchange hole 103 is located on the same line as the first heat exchange hole.

[0165] The fact that the third upper heat exchange hole 103 is located on the straight line of the first heat exchange hole can be understood as at least a portion of the third upper heat exchange hole 103 being located on the straight line of the first heat exchange hole.

[0166] Optionally, 10°≤β1≤30°.

[0167] Optionally, when β1 is greater than or equal to 10° and less than or equal to 30°, the heat exchanger fins can be irregularly arc-shaped. For example... Figure 24 As shown.

[0168] Optionally, the straight line between the first central heat exchange hole 201 and the second central heat exchange hole 202 is the straight line of the third heat exchange hole. The central fin region 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 straight line of the third heat exchange hole.

[0169] The fact that the third central heat exchange hole 203 is located on the straight line of the third heat exchange hole can be understood as at least a portion of the third central heat exchange hole 203 being located on the straight line of the third heat exchange hole. Alternatively, it can 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 collinear. Figure 27 As shown.

[0170] Optionally, the upper fin region also includes a third upper heat exchange hole 103 near the first upper heat exchange hole 101, wherein the third upper heat exchange hole 103 is located on the straight line of the second heat exchange hole.

[0171] The fact that the third upper heat exchange hole 103 is located on the straight line of the second heat exchange hole can be understood as at least a portion of the third upper heat exchange hole 103 being located on the straight line of the second heat exchange hole.

[0172] Optionally, 25°≤β1≤50°.

[0173] Optionally, when β1 is greater than or equal to 25° and less than or equal to 50°, the heat exchanger fins can be in a regular arc shape. For example... Figure 26 As shown.

[0174] It is understood that, without conflict, the embodiments of the heat exchanger and the features in the embodiments of the present application can be combined with each other.

[0175] Figure 33 This is a comparison of velocity distribution contour maps between the heat exchanger of this application and an existing Type I inclined heat exchanger. Among them, Figure 33 Figure a above is a velocity distribution contour map of an existing Type I inclined heat exchanger. Figure 33 Figure b below is a velocity distribution cloud map of the heat exchangers in various embodiments of this application.

[0176] from Figure 33 As can be seen, the Type I inclined heat exchanger exhibits a high wind speed at the top and a low wind speed at the bottom, resulting in uneven wind speed distribution and low heat exchange efficiency. Specifically, the area with high wind speed at the top is as follows: Figure 33As shown in the upper circle of 'a', the lower area with low wind speed is as follows: Figure 33 The lower circle of 'a' in the diagram is shown.

[0177] The heat exchanger provided in this application effectively guides the incoming flow from the high-velocity central zone to both the upper and lower sections, resulting in a uniform overall airflow distribution. This uniform airflow distribution improves the uniformity of the heat exchange field, thereby enhancing the overall heat exchange performance of the heat exchanger. Figure 33 As shown in b in the figure.

[0178] Furthermore, the fin slope section of the heat exchanger provided in this application is relatively short, which reduces the risk of poor drainage on the fin surface.

[0179] This disclosure also provides an indoor air conditioning unit, which may also be referred to as a ducted air conditioning device or duct unit.

[0180] Optionally, the indoor unit of the air conditioner includes an indoor unit housing 4, an indoor fan 5, and a heat exchanger. The indoor unit housing 4 has an internal accommodating space; the indoor fan 5 is disposed within the accommodating space; and the heat exchanger is disposed within the accommodating space and located on the exhaust side of the indoor fan 5. The heat exchanger is as described above.

[0181] The indoor air conditioning unit, which includes the aforementioned heat exchanger, improves the heat exchange efficiency between the indoor fan 5 and the heat exchanger.

[0182] This disclosure provides an air conditioner whose heat exchanger can not only adapt to the wind speed at different positions on its windward side, but also avoid the risk of poor drainage on the surface of the heat exchanger, resulting in a better user experience.

[0183] This disclosure provides an air conditioner including a casing, a heat exchanger, and an indoor fan 5. The casing has an installation cavity 41; the heat exchanger is disposed within the installation cavity 41 and includes an upper straight plate section, a middle straight plate section, and a lower straight plate section connected sequentially. The middle straight plate section is vertically arranged, and the upper and lower straight plate sections are positioned above and below the middle straight plate section, respectively, and are bent towards the indoor fan 5; the indoor fan 5 is disposed within the installation cavity 41, and the air outlet direction of the indoor fan 5 is limited to the direction towards the heat exchanger; wherein the included angle α between the upper and middle straight plate sections is greater than or equal to 100°, and the included angle β between the lower and middle straight plate sections is greater than or equal to 100°.

[0184] like Figure 30As shown, the heat exchanger includes fins and heat exchange tubes passing through the fins. The side view of the heat exchanger, seen from its side, is also a side view of the fins. The statement in this embodiment that "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 the side view of the heat exchanger including the upper straight plate section, the middle straight plate section, and the lower straight plate section; that is, the fins of the heat exchanger include the upper straight plate section, the middle straight plate section, and the lower straight plate section.

[0185] It is understandable that the upper straight plate segment can also be referred to as the aforementioned upper wing segment, the middle straight plate segment can also be referred to as the aforementioned middle wing segment, and the lower straight plate segment can also be referred to as the aforementioned lower wing segment.

[0186] like Figure 30 As shown in this embodiment, each fin includes an upper fin segment, a middle fin segment, and a lower fin segment. Each fin segment has parallel side profiles, giving each fin segment a straight plate shape. When multiple fins are arranged in parallel and heat exchange tubes are inserted to form a heat exchanger, the upper fin segments of the multiple fins constitute the upper straight plate section of the heat exchanger, the middle fin segments of the multiple fins constitute the middle straight plate section of the heat exchanger, and the lower fin segments of the multiple fins constitute the lower straight plate section of the heat exchanger. It is understood that, in this embodiment, unless otherwise specified, the upper straight plate section and the upper fin segment essentially mean the same thing, and in some optional embodiments, they can be used interchangeably. Similarly, unless otherwise specified, the middle straight plate section and the middle fin segment essentially mean the same thing, and in some optional embodiments, they can be used interchangeably; the lower straight plate section and the lower fin segment essentially mean the same thing, and in some optional embodiments, they can be used interchangeably.

[0187] 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 mounting cavity 41 of the casing, which is connected to the air inlet 42 and the air outlet 43 respectively. The heat exchanger is configured as an integrated plate structure, and the entire heat exchanger is arranged vertically. 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 airflow direction 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 towards the indoor fan 5. The lower straight plate section is located below the middle straight plate section, and the lower edge of the lower straight plate section is inclined towards the indoor fan 5. This allows the heat exchanger to form an overall bow-shaped structure. It is understandable that the air velocity varies at different locations within the duct when it is blown to the heat exchanger. Therefore, setting the heat exchanger to a bow-shaped structure is more conducive to adapting the heat exchanger to the air velocity at different locations on its windward side, thereby improving the heat exchange efficiency. At the same time, to increase the heat exchange area, existing straight plate heat exchangers need to be inclined, resulting in a larger horizontal space occupied by the heat exchanger. Therefore, setting the heat exchanger to a bow-shaped structure can increase the heat exchange area while reducing the horizontal space occupied by the heat exchanger.

[0188] In the above embodiment, since the sidewall of the middle straight plate section is a vertical plane, the area of ​​the inclined plane of the entire heat exchanger can be reduced, thereby avoiding the risk of poor drainage on the surface of the heat exchanger. Simultaneously, the included angle α between the upper and middle straight plate sections can be set according to the dimensions of the casing; for example, the included angle α between the upper and middle straight plate sections can be 100°, 110°, 120°, 130°, or 140°. It is understood that the heat exchanger will produce condensate during air conditioning operation. Therefore, making the included angle α greater than or equal to 100° can increase the slope of the upper straight plate section, further avoiding the risk of poor drainage on the surface of the heat exchanger. Similarly, the included angle β between the lower and middle straight plate sections can be set according to the dimensions of the casing; for example, the included angle β between the lower and middle straight plate sections can be 100°, 110°, 120°, 130°, or 140°.

[0189] In practical applications, some existing heat exchangers are configured as split-type structures to accommodate different air velocities. However, the multiple components of a split-type heat exchanger increase the overall scrap rate during manufacturing, raising production costs. Furthermore, the individual installation of each component increases the difficulty of installation. Therefore, this application proposes a one-piece, bow-shaped heat exchanger structure, which not only accommodates different air velocities but also reduces the scrap rate during manufacturing and simplifies installation.

[0190] Optionally, the connection between the upper and middle straight plate sections is configured with rounded corners to ensure a smooth connection and further avoid the risk of poor drainage on the heat exchanger surface. Similarly, the connection between the lower and middle straight plate sections is also configured with rounded corners to ensure a smooth connection.

[0191] 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.

[0192] Specifically, the thickness of the middle straight section is a first thickness A1, the thickness of the upper straight section is a second thickness A2, and the thickness of the lower straight section is a third thickness A3. The first thickness A1 is greater than both 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.

[0193] It is understood that the first thickness A1 of the middle straight plate segment is the width W2 of the second side outline 21 of the aforementioned middle wing segment; the second thickness A2 of the upper straight plate segment is the width W1 of the first side outline 11 of the aforementioned upper wing segment; and the third thickness A3 of the lower straight plate segment is the width W3 of the third side outline 31 of the aforementioned lower wing segment.

[0194] Understandably, when the indoor fan supplies air to the heat exchanger in five directions, the air velocity is highest at the middle straight plate section, while the air velocity at the upper and lower straight plate sections is lower. Therefore, the middle straight plate section is thicker than the upper and lower straight plate sections to ensure sufficient heat exchange in the middle section and to guarantee a more uniform air velocity after the air flows through the heat exchanger.

[0195] In some embodiments, the side wall of the heat exchanger near the indoor fan 5 is configured as the windward side wall, and the side wall of the heat exchanger away from the indoor fan 5 is configured as the leeward side wall; wherein the size and shape of the windward side wall correspond to the size and shape of the leeward side wall.

[0196] Specifically, the dimensions and shape of the windward side wall are the same as those of the leeward side wall. After moving the windward side wall a certain distance horizontally, they can overlap. It is understood that heat exchangers generally include fins, and these fins are typically manufactured from a single large sheet of material through shearing or stamping processes. Therefore, making the shape and dimensions of the windward side wall identical to those of the leeward side wall reduces processing waste between adjacent fins, thus improving the utilization efficiency of raw materials during heat exchanger manufacturing.

[0197] It is understandable that the windward side wall is the aforementioned edge of the windward side, and the leeward side wall is the aforementioned edge of the leeward side.

[0198] like Figure 31 and Figure 32 As shown, in some embodiments, the housing is also provided with a fixing structure 47, which is used to fix the heat exchanger in the mounting cavity.

[0199] Specifically, the side wall of the mounting cavity is also provided with snap-fit ​​components such as clips or fasteners such as screws to form a fixing structure 47. The heat exchanger can be snapped into the mounting cavity by snap-fit ​​components, or the heat exchanger can be fastened to the mounting cavity by fasteners.

[0200] In some embodiments, the included angle α between the upper straight plate segment and the middle straight plate segment is less than or equal to 170°; the included angle β between the lower straight plate segment and the middle straight plate segment is less than or equal to 170°.

[0201] Specifically, the included angle α between the upper and middle straight plate sections can be set according to the height of the mounting cavity. For example, the included angle α can be 170°, 160°, 150°, 140°, or 130°. This allows for a reduction in the overall height of the upper straight plate section while maintaining its heat exchange area. Similarly, the included angle β of the second plate section can be 170°, 160°, 150°, 140°, or 130° to reduce the height of the lower straight plate section.

[0202] In the above embodiments, the height of the upper straight plate segment refers to the distance between the horizontal plane where the upper end face of the upper straight plate segment is located and the horizontal plane where the lower end face is located, and the height of the lower straight plate segment refers to the distance between the horizontal plane where the upper end face of the lower straight plate segment is located and the horizontal plane where the lower end face is located.

[0203] In some embodiments, the first cross-section of the upper straight section is configured as a parallelogram; the second cross-section of the middle straight section is configured as a rectangle; and the third cross-section of the lower straight section has the same dimensions and shape as the first cross-section of the upper straight section.

[0204] Specifically, the first cross-section of the upper straight plate section and the third cross-section of the lower straight plate section are configured as parallelograms, and the middle straight plate section is configured as a rectangle. This makes the overall structure of the heat exchanger simpler and easier to produce and process.

[0205] In some embodiments, the side of the first cross section near the indoor fan 5 forms the upper windward line, the side of the third cross section near the indoor fan 5 forms the lower windward line, and the midpoint of the line segment connecting the upper end point of the upper windward line and the lower end point of the lower windward line forms the reference F; wherein, the first connection angle e1 between the reference point F and the line connecting 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°.

[0206] Specifically, the angle between reference point F and the line connecting the upper and lower endpoints of the upper windward line is the first connecting angle e1. The first connecting angle e1 can be 30°, 60°, 90°, 120°, or 160°. This allows the inclination and length of the upper windward line to better match the wind speed at the upper straight section. It can be understood that the side of the first cross-section 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, meaning the inclination and length of the upper leeward line are the same as those of the upper windward line.

[0207] In some embodiments, the second connection angle e2 between the reference point F and the line connecting the upper and lower endpoints of the lower windward line is greater than or equal to 30° and less than or equal to 160°.

[0208] Specifically, the angle between reference point F and the line connecting the upper and lower endpoints of the lower windward line is the second connecting angle e2. The second connecting angle e2 can be 30°, 60°, 90°, 120°, or 160°. This allows the inclination and length of the lower windward line to better match the wind speed at the lower straight section. It can be understood that the side of the third cross-section 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.

[0209] In some embodiments, the side of the second cross section near the indoor fan 5 constitutes the central windward line; wherein, the third connection angle e3 between the reference point F and the connecting lines of the upper and lower endpoints of the central windward line is greater than or equal to 30° and less than or equal to 160°.

[0210] Specifically, the angle between reference point F and the lines connecting the upper and lower endpoints of the center windward line is the third connecting angle e3. The third connecting angle e3 can be 30°, 60°, 90°, 120°, or 160°. This allows the inclination and length of the center windward line to better match the wind speed at the center straight section. It can be understood that the side of the second cross-section 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.

[0211] It is understandable that the upper windward line is the aforementioned first windward side profile line, the middle windward line is the aforementioned second windward side profile line, and the lower windward line is the aforementioned third windward side profile line; the upper leeward line is the aforementioned first leeward side profile line, the middle leeward line is the aforementioned second leeward side profile line, and the lower leeward line is the aforementioned third leeward side profile line.

[0212] This disclosure provides an air conditioner, the indoor unit of which includes an indoor unit housing 4, a volute, an indoor fan 5, and a heat exchanger 6. For example... Figure 38 and Figure 40 As shown, the volute includes a receiving cavity 417 and an air outlet 46. The indoor fan 5 is disposed in the receiving cavity 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, passes through the heat exchanger 6, and then flows into the room through the air outlet 43.

[0213] In some embodiments, the volute includes a receiving cavity 417 and an air outlet 46. The receiving cavity 417 is used to install an indoor fan 5, and the air outlet 46 communicates with the outlet 4171 of the receiving cavity 417. A heat exchanger 6 is disposed within the air outlet 46, and the heat exchanger 6 includes a plurality of fins 64 arranged parallel to each other 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 receiving cavity 417, and the middle fin segment 2 includes a second windward profile 212. Figure 39 and Figure 40 As shown, the midpoint of the longitudinal section of the outlet 4171 of the accommodating cavity 417 is the reference point H, and the angle subtended by the second windward profile 212 corresponding to the reference point H is c1, where 6°≤c1≤50°. For example, c1 can be selected as 6°, 10°, 15°, 20°, 25°, 30°, 35°, 40°, 45°, or 50°.

[0214] In this embodiment, the orientation of the air conditioner is as follows: Figure 39As shown, the housing 417 is located at the rear of the air conditioner, and the air outlet 46 is located at the front. The heat exchanger 6 is installed after the air outlet 46. The three sections of the fins 64, from top to bottom, are called the upper fin section 1, the middle fin section 2, and the lower fin section 3. Since the housing 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... Figure 40 As shown. The cross-section along the front-to-back direction of the air conditioner is called the longitudinal section, and the cross-section perpendicular to the longitudinal section is called the cross section. The three-segment fins 64 are arc-shaped or bow-shaped, hence also called arc-shaped fins 64 or bow-shaped fins 64. This shape design guides the airflow. The opening angle c1 of the middle fin segment 2 is designed between 6° and 50°, which helps to optimize the contact angle between the airflow and the middle fin segment 2, making heat exchange more complete and thus improving heat exchange efficiency.

[0215] Optionally, 6°≤c1≤30°. For example, c1 can be 6°, 8°, 12°, 16°, 22°, 26°, 28° or 30°.

[0216] Optionally, the upper wing segment 1, the middle wing segment 2, and the lower wing segment 3 of the wing 64 are integrally formed. For example... Figure 41 As shown in (a), to avoid confusion, the upper wing segment 1 includes a first side profile 11, which includes a first windward side profile 112 and a first leeward side profile 111. The middle wing segment 2 includes a second side profile 21, which includes a second windward side profile 212 and a second leeward side profile 211. The lower wing segment 3 includes a third side profile 31, which includes a third windward side profile 312 and a third leeward side profile 311. Furthermore, the first windward side profile 112, the second windward side profile 212, and the third windward side profile 312 form the windward side profile 641, and the first leeward side profile 111, the second leeward side profile 211, and the third leeward side profile 311 form the leeward side profile 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 or may not be rounded.

[0217] Optionally, such as Figure 39 As shown, the upper wing segment 1 includes a first windward profile line 112, and the angle of the first windward profile line 112 corresponding to the reference point H is c2. The lower wing segment 3 includes a third windward profile line 312, and the angle of the third windward profile line 312 corresponding to the reference point H is c3.

[0218] In this embodiment, the relationship between c1, c2, and c3 is defined. Specifically, 0.3 ≤ c2 / c1 ≤ 0.7, for example, c2 / c1 can be 0.3, 0.4, 0.5, 0.6, or 0.7. Also, 0.5 ≤ c3 / c1 ≤ 0.9, for example, c3 / c1 can be 0.5, 0.6, 0.7, 0.8, or 0.9. Finally, 0.6 ≤ c1 / (c2+c3) ≤ 1, for example, c1 / (c2+c3) can be 0.6, 0.7, 0.8, 0.9, or 1. By designing the proportional relationship of the three opening angles, the contact angles between the airflow and the three wing segments can be optimized, resulting in a more uniform airflow distribution.

[0219] Optionally, such 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. Furthermore, 0.2 ≤ h2 / (h1+h2+h3) ≤ 0.5. For example, h2 / (h1+h2+h3) can be chosen as 0.2, 0.3, 0.4, or 0.5. This design, through the height relationship of the three wing segments, allows for matching the distribution of circulating air. With the upper wing segment 1 and the lower wing segment 3 arranged at an angle, the length of the slope section of fin 64 is shorter, reducing the risk of poor drainage on the surface of fin 64.

[0220] Optionally, the height of the longitudinal section of the outlet 4171 of the accommodating cavity 417 is T, and the height of the middle fin segment 2 is h2, where 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. Here, h2 affects the heat exchange area of ​​the middle fin segment 2, and T affects the air outlet area. Through a reasonable proportional design, the air outlet area is matched with the heat exchange area of ​​the middle fin segment 2. Furthermore, combining the design of the three opening angles and the height relationship of the three fin segments, when the wind speed corresponding to the middle fin segment 2 is relatively high, it is beneficial for the air flowing through the middle fin segment 2 to diffuse upwards to the upper fin segment 1 and lower fin segment 3, ensuring that the airflow is matched with the heat exchange area, thereby improving heat exchange efficiency.

[0221] Optionally, the middle wing segment 2 also includes a second leeward profile line 211, both of which are straight lines and parallel to each other. Thus, the middle wing segment 2 is straight.

[0222] In some embodiments, the air conditioner includes a volute and a heat exchanger 6. The volute includes an air outlet 46, which includes a first diffuser 411. The heat exchanger 6 is disposed in the air outlet 46 and includes a plurality of fins 64 arranged parallel to each other along the axis 418 of the volute. The fins 64 include a windward profile 641, and the first diffuser 411 extends toward the windward profile 641. Figure 40As shown, the intersection point of the extension direction of the first diffuser plate 411 and the windward profile line 641 is T1. The length between T1 and the nearest endpoint of the windward profile line 641 is t1, and the total length of the windward profile line 641 is t, with t1 / t ≤ 30%. In this way, the first diffuser plate 411 and the windward profile line 641 intersect, which is beneficial for guiding the airflow. Furthermore, the t1 / t ratio design helps to match the airflow guided by the first diffuser plate 411 with the length of the windward profile line 641, thereby improving heat exchange efficiency.

[0223] In this embodiment, the total length t of the windward side profile 641 is equal to the sum of the lengths of the first windward side profile 112, the second windward side profile 212, and the third windward side profile 312. If the intersection point T1 is closest to the upper end of the windward side profile 641, then t1 is equal to the length between the intersection point T1 and the upper end of the windward side profile 641; if the intersection point T1 is closest to the lower end of the windward side profile 641, then t1 is equal to the length between the intersection point T1 and the lower end of the windward side profile 641.

[0224] Optionally, 5% ≤ t1 / t ≤ 30%. For example, t1 / t can be selected as 5%, 10%, 15%, 20%, 25%, or 30%.

[0225] Optionally, such as Figure 40 As shown, the angle between the first diffuser plate 411 and the horizontal direction is φ1, where 5°≤φ1≤60°. For example, φ1 can be selected as 5°, 10°, 20°, 30°, 40°, 50°, or 60°. By adjusting the value of φ1, the position of the intersection point T1 can be adjusted, and the smaller φ1 is, the closer the intersection point T1 is to the upper end of the first windward side contour line 112.

[0226] Optionally, the fin 64 includes an upper fin segment 1, a middle fin segment 2, and a lower fin segment 3 connected in sequence, with both the upper fin segment 1 and the lower fin segment 3 inclined towards the axis 418 of the volute. The windward profile 641 corresponding to the upper fin segment 1 is called the first windward profile 112, and the extending direction of the first diffuser plate 411 intersects the first windward profile 112 at T1. Here, the first diffuser plate 411 is located at the upper part of the volute.

[0227] Optionally, such as Figure 40As shown, the air outlet 46 also includes a second diffuser 412, which is spaced apart below the first diffuser 411 and extends toward the third windward profile line 312. The intersection point of the extension direction of the second diffuser 412 and the third windward profile line 312 is T2, and the length between T2 and the lower end of the third windward profile line 312 is t2, where t2 / t ≤ 30%. Further, 5% ≤ t2 / t ≤ 30%. For example, t2 / t can be selected as 5%, 10%, 15%, 20%, 25%, or 30%. In this way, the second diffuser 412 intersects with the third windward profile line 312, which is beneficial for guiding the airflow. Furthermore, the t2 / t ratio design helps to match the airflow guided by the second diffuser 412 with the length of the windward profile line 641.

[0228] Optionally, such as Figure 40 As shown, the angle φ2 between the second diffuser plate 412 and the horizontal direction is 5°≤φ2≤60°. For example, φ2 can be selected as 5°, 10°, 20°, 30°, 40°, 50°, or 60°. By adjusting the value of φ2, the position of the intersection point T2 can be adjusted, and the larger the value of φ2, the closer the intersection point T2 is to the lower end of the third windward profile line 312. In this way, the first diffuser plate 411 and the second diffuser plate 412 form a diffusion-type airflow guide. The design of the values ​​of φ1 and φ2, combined with the ratio design of t1 / t and t2 / t, enables the air to diffuse evenly towards the heat exchanger 6.

[0229] Optionally, such 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 profile line 642, and the leeward profile line 642 corresponding to the upper fin segment 1 is called the first leeward profile line 111. Furthermore, the first leeward profile line 111 intersects with the third diffuser plate 413 at an angle γ1, where 20°≤γ1≤90°. For example, γ1 can be selected as 20°, 30°, 40°, 50°, 60°, 70°, 80°, or 90°.

[0230] Optionally, such as Figure 40As shown, the air outlet 46 also includes a fourth diffuser 414 and a sixth diffuser 416. The fourth diffuser 414 is connected to the second diffuser 412 and extends downward, while the sixth diffuser 416 is connected to the fourth diffuser 414 and extends upward. The fin 64 also includes a leeward side profile line 642, and the leeward side profile line 642 corresponding to the lower fin segment 3 is called the third leeward side profile line 311. Furthermore, the third leeward side profile line 311 intersects with the sixth diffuser 416 at an angle γ2, where 20°≤γ2≤90°. For example, γ2 can be selected as 20°, 30°, 40°, 50°, 60°, 70°, 80°, or 90°.

[0231] In some embodiments, the volute includes a receiving cavity 417 and an air outlet 46, the air outlet 46 including a first air outlet 44 and a second air outlet 45. For example... Figure 40 As shown, the cavity 417 is used to install an indoor fan 5. A first air outlet 44 is connected to the outlet 4171 of the cavity 417, and the cross-sectional area of ​​the gas flow in the first air outlet 44 gradually increases along the airflow direction. A second air outlet 45 is connected to the outlet 441 of the first air outlet 44 and is used to house a heat exchanger 6, and at least a portion of the cross-sectional area of ​​the gas flow in the second air outlet 45 is larger than the maximum cross-sectional area of ​​the gas flow in the first air outlet 44.

[0232] In this embodiment, the orientation of the air conditioner is as follows: Figure 39 As shown, the cross-section along the front-to-back direction of the air conditioner is called the longitudinal section, and the cross-section perpendicular to the longitudinal section is called the cross-section. The cross-sectional area of ​​the gas flow in the first air outlet 44 refers to the area of ​​the first air outlet 44 on the cross-section, and the cross-sectional area of ​​the gas flow in the second air outlet 45 refers to the area of ​​the second air outlet 45 on the cross-section. The heat exchanger 6 is entirely disposed within the second air outlet 45, ensuring that all air outlets from the volute exchange heat with the heat exchanger 6. Furthermore, since the cross-sectional area of ​​the gas flow in the first air outlet 44 gradually increases along the air outlet direction, a diffusion-type flow is formed, and the reduced flow velocity after diffusion facilitates full contact between the air and the heat exchanger 6. Because the cross-sectional area of ​​the gas flow in at least a portion of the second air outlet 45 is larger than the maximum cross-sectional area of ​​the gas flow in the first air outlet 44, the abrupt increase in cross-sectional area of ​​the second air outlet 45 acts as a buffer, which is beneficial for the uniform contact between the air and the heat exchanger 6. In this way, the heat exchange efficiency between the air and the heat exchanger 6 is effectively improved through the structural design of the volute.

[0233] Optionally, such as Figure 40As 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 φ1, where 5°≤φ1≤60°. The second diffuser plate 412 is spaced apart from the first diffuser plate 411 and is not parallel to it. The second diffuser plate 412 is parallel to the axis 418 of the volute and extends downward. The angle between the second diffuser plate 412 and the horizontal direction is φ2, where 5°≤φ2≤60°. 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 diffusion-type airflow guide, and the diffusion direction is optimized by the design of the values ​​of φ1 and φ2, which is beneficial for the uniform diffusion of air towards the heat exchanger 6.

[0234] Optionally, such 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 upwards, with an angle of φ3 between its extension direction and that of the first diffuser plate 411, where 10°≤φ3≤30°. The fourth diffuser plate 414 is connected to the second diffuser plate 412 and extends downwards, with an angle of φ5 between its extension direction and that of the second diffuser plate 412, where 15°≤φ5≤35°. The fifth diffuser plate 415 is connected to the third diffuser plate 413 and extends downwards, with an angle of φ4 between its extension direction and that of the third diffuser plate 413, where 40°≤φ4≤60°. The sixth diffuser plate 416 is connected to the fourth diffuser plate 414 and extends upward. The angle between the extending directions of the sixth diffuser plate 416 and the fourth diffuser plate 414 is φ6, and 40°≤φ6≤60°. For example, φ3 can be selected as 10°, 15°, 20°, 25°, or 30°. For example, φ4 can be selected as 40°, 45°, 50°, 55°, or 60°. For example, φ5 can be selected as 15°, 20°, 25°, 30°, or 35°. For example, φ6 can be selected as 40°, 45°, 50°, 55°, or 60°.

[0235] In this embodiment, the volute is installed after the air conditioner is mounted, and the orientation of the air conditioner is as follows: Figure 39 As shown. The upward extension of the diffuser plate refers to its extension towards the top of the air conditioner, while the downward extension refers to its extension towards the bottom of the air conditioner. Thus, through the design of multiple diffusers in the second air outlet 45, and the specific values ​​of φ3, φ4, φ5, and φ6, the cross-sectional area of ​​the portion of the second air outlet 45 located upstream of the heat exchanger 6 abruptly increases, thereby providing a buffering effect. Furthermore, the cross-sectional area of ​​the portion of the second air outlet 45 near the air outlet 43 decreases again, thereby concentrating the air.

[0236] In some embodiments, the air conditioner includes a heat exchanger 6 and the aforementioned volute. For example... Figure 39 As shown, heat exchanger 6 is disposed in the second air outlet 45. The distance between the outlet 4171 of the accommodating cavity 417 and heat exchanger 6 is U1, and the distance between the outlet 451 of the second air outlet 45 and heat exchanger 6 is U2. Furthermore, 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 match the airflow distance before and after heat exchanger 6, thereby improving airflow efficiency. In this embodiment, U1 is the minimum distance between the outlet 4171 of the accommodating cavity 417 and the windward profile line 641. U2 is the minimum distance between the outlet 451 of the second air outlet 45 and the leeward profile line 642.

[0237] Optionally, 30mm ≤ U1 ≤ 150mm. For example, U1 can be selected as 30mm, 60mm, 80mm, 100mm, 110mm, 120mm, 130mm or 150mm.

[0238] Optionally, 10mm ≤ U2 ≤ 150mm. For example, U2 can be selected as 10mm, 20mm, 30mm, 60mm, 80mm, 100mm, 110mm, 120mm, 130mm or 150mm.

[0239] Optionally, such 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. Furthermore, 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. U1 affects the flow state of the airflow before entering the heat exchanger 6. Too small a spacing may lead to uneven velocity distribution of the airflow upon entering the heat exchanger 6, while too large a spacing may increase flow losses. The value of h1+h2+h3 affects the overall heat exchange height of the fins 64. By optimizing the ratio of U1 / (h1+h2+h3), it is ensured that the airflow contacts the fins 64 uniformly and efficiently.

[0240] In some embodiments, the heat exchanger 6 includes fins 64, which include a middle fin segment 2, an upper fin segment 1, and a lower fin segment 3. For example... Figure 41As shown in (b), a first heat transfer unit (12) is provided on the surface of the middle fin segment (2), 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 a second heat transfer unit (13) is provided on the surface thereof, and 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 both the lower fin segment (3) and the upper fin segment (1) are located on the same side of the middle fin segment (2). A third heat transfer unit (14) is provided on the surface of the lower fin segment (3), and the third heat transfer unit (14) includes P3 third heat transfer structures (141). Wherein, 1≤P1<P2, and / or, 1≤P1<P3, and / or, 1≤P3<P2.

[0241] In this embodiment, the first heat transfer structure (121), the second heat transfer structure (131) and the third heat transfer structure (141) all function 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, the direction and flow velocity of the flowing air will be affected. By optimizing the numerical relationship among P1, P2 and P3, the air flow characteristics of different fin segments can be adapted, guiding the air flow of the middle fin segment (2) to the upper fin segment (1) and the lower fin segment (3), thereby improving the overall heat exchange efficiency of the fin (64).

[0242] Optionally, 1≤P1≤10. For example, P1 can be 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10. Optionally, 1≤P2≤10. For example, P2 can be 1, 2, 3, 4, 5, 6, 7, 8, 9, or 10. Optionally, 1≤P3≤10. For example, P3 can be 1, 2, 3, 4, 5, 6, 7, 8, 9, or 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.

[0243] Optionally, the first heat transfer structure (121) and / or the second heat transfer structure (131) and / or the third heat transfer structure (141) is configured as a bridge sheet structure (65), as Figure 42 shown. The bridge sheet structure (65) includes a bridge top wall (651) parallel to the fin (64), and bridge side walls (652) respectively connected to the fin (64) in an inclined manner at both ends of the bridge top wall (651).

[0244] Optionally, the first heat transfer structure (121) and / or the second heat transfer structure (131) and / or the third heat transfer structure (141) is configured as a louver structure (66), as Figure 43 shown. The louver structure (66) includes a louver top wall (661) non-parallel to the fin (64), and louver side walls (662) respectively connected to the fin (64) at both ends of the louver top wall (661).

[0245] 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. Wherein, 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 sidewall 652 and the fin 64 or the window top wall 661 and the fin 64, and zn5 is the spacing between adjacent bridge structures 65 or adjacent louver structures 66.

[0246] 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 height of all bridge structures 65 or louver structures 66 is within the range of zn1.

[0247] Optionally, the characteristic parameters of the first heat transfer structure 121, the second heat transfer structure 131, and the third heat transfer structure 141 may be the same or different, and / or, some or all of the characteristic parameters of the first heat transfer structure 121 may be the same or different, and / or, some or all of the characteristic parameters of the second heat transfer structure 131 may be the same or different, and / or, some or all of the characteristic parameters of the third heat transfer structure 141 may be the same or different. Figure 42 , Figure 43 and Figure 44 As shown, the characteristic parameters include zn1, zn2, zn3, zn4, and zn5.

[0248] 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 louver structure 66 corresponding to the first heat transfer structure 121, z12 is the width of the bridge structure 65 or louver structure 66 corresponding to the first heat transfer structure 121, z13 is the length of the bridge structure 65 or louver structure 66 corresponding to the first heat transfer structure 121, and z15 is the spacing between adjacent bridge structures 65 or louver structures 66 corresponding to the first heat transfer structure 121.

[0249] For example, z11 can be 0.5mm, 0.6mm, or 0.7mm. For example, z12 can be 1.6mm, 1.7mm, or 1.8mm. For example, z13 can be 3mm, 4mm, 5mm, 6mm, 7mm, 8mm, 9mm, or 10mm. For example, z14 can be 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 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; z15 = 0mm indicates that the two louver structures 66 have no gap.

[0250] 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 louver structure 66 corresponding to the second heat transfer structure 131, z22 is the width of the bridge structure 65 or louver structure 66 corresponding to the second heat transfer structure 131, z23 is the length of the bridge structure 65 or louver structure 66 corresponding to the second heat transfer structure 131, and z25 is the spacing between adjacent bridge structures 65 or louver structures 66 corresponding to the second heat transfer structure 131.

[0251] For example, z21 can be 0.5mm, 0.6mm, or 0.7mm. For example, z22 can be 1mm, 1.2mm, or 1.3mm. For example, z23 can be 5mm, 6mm, 7mm, 8mm, 9mm, or 10mm. For example, z24 can be 10°, 20°, 30°, 45°, 60°, or 90°. When the second heat transfer structure 131 is a bridge structure 65, 1.1mm ≤ z25 ≤ 1.7mm; for example, z25 can be 1.1mm, 1.2mm, 1.4mm, 1.5mm, 1.6mm, or 1.7mm. When the second heat transfer structure 131 is a louver structure 66, 0mm ≤ z25 ≤ 1.7mm; z25 = 0mm indicates that the two louver structures 66 have no gap.

[0252] Optionally, 0.5mm<z31<0.7mm, and / or 1.6mm<z32<1.8mm, and / or 5mm≤z33≤10mm, and / or 10°≤z34≤90°, and / or z35≤1.7mm; z31 is the height of the bridge structure 65 or louver structure 66 corresponding to the third heat transfer structure 141, z32 is the width of the bridge structure 65 or louver structure 66 corresponding to the third heat transfer structure 141, z33 is the length of the bridge structure 65 or louver structure 66 corresponding to the third heat transfer structure 141, and z35 is the spacing between adjacent bridge structures 65 or louver structures 66 corresponding to the third heat transfer structure 141.

[0253] For example, z31 can be 0.5mm, 0.6mm or 0.7mm. For example, z32 can be 1.6mm, 1.7mm or 1.8mm. For example, z33 can be 5mm, 6mm, 7mm, 8mm, 9mm or 10mm. For example, z34 can be 10°, 20°, 30°, 45°, 60° or 90°. When the third heat transfer structure 141 is the bridge structure 65, 1.1mm≤z35≤1.7mm, for example, z35 can be 1.1mm, 1.2mm, 1.4mm, 1.5mm, 1.6mm or 1.7mm. When the third heat transfer structure 141 is the louver structure 66, 0mm≤z35≤1.7mm, and z35=0mm means that there is no spacing between two adjacent louver structures 66.

[0254] Optionally, as Figure 45 shown, the drag coefficient of the middle fin segment 2 is f1, the drag coefficient of the upper fin segment 1 is f2, and the drag coefficient of the lower fin segment 3 is f3; wherein, f1<f2, and / or f1<f3, and / or f2=f3.

[0255] In this embodiment, parameter design for different fin segments can be matched by optimizing the drag coefficient of the three fin segments. Here, the drag coefficient can be determined according to the following formula: wherein f is the drag coefficient, F is the wind resistance, ρ is the incoming air density, and v is the wind speed. Furthermore, the wind resistance corresponding to the middle fin segment 2 is F1, and the corresponding wind speed is v1; the wind resistance corresponding to the upper fin segment 1 is F2, and the corresponding wind speed is v2; the wind resistance corresponding to the lower fin segment 3 is F3, and the corresponding wind speed is v3.

[0256] Since the change in air density is very small, the air density corresponding to each wing segment can be considered equal. Because the pressure difference before and after the airflow passes through each wing segment is very close, F1 = F2 = F3 can be assumed. Therefore, f ∝ 1 / (v^2), meaning 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.

[0257] Optionally, in the upper wing segment 1 or the lower wing segment 3, the drag coefficient is greater in the region farther away from the middle wing segment 2.

[0258] For example, such as Figure 46 As shown in (a), the upper wing segment 1 includes a first drag zone and a second drag zone. The first drag zone is close to the middle wing segment 2, and the second drag zone is located on the side of the first drag zone away from the middle wing segment 2. Furthermore, the drag coefficient corresponding to the first drag zone is f21, and the drag coefficient corresponding to the second drag zone is f22, and f1 < f21 < f22.

[0259] For example, such as Figure 46 (b) The lower wing segment 3 includes a third drag zone and a fourth drag zone. The third drag zone is close to the middle wing segment 2, and the fourth drag zone is located on the side of the third drag zone away from the middle wing segment 2. Furthermore, the drag coefficient corresponding to the third drag zone is f31, and the drag coefficient corresponding to the fourth drag zone is f32, and f1 < f31 < f32.

[0260] The foregoing description and accompanying drawings fully illustrate 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. Individual components and functions are optional unless explicitly required, and the order of operation may vary. Parts and features of some embodiments may be included or substituted for parts and features of other embodiments. 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 its scope. The scope of the present disclosure is limited only by the appended claims.

Claims

1. A heat exchanger with arc-shaped fins, characterized in that, Includes fins and heat exchange tubes passing through the fins. The fins include: The upper wing segment (1) includes parallel, straight first lateral contour lines (11) spaced W1 apart; The middle wing segment (2) is located below the upper wing segment (1) and is bent and connected to the upper wing segment (1). The middle wing segment (2) includes parallel, straight second side profile lines (21) spaced W2 apart; and, The lower wing segment (3) is located below the middle wing segment (2) and is bent and connected to the middle wing segment (2). The lower wing segment (3) includes parallel straight third side contour lines (31) with a spacing of W3. Among them, the upper wing segment and the lower wing segment are located on the same side of the middle wing segment, W2≥W1, and W2>W3.

2. The heat exchanger according to claim 1, characterized in that, 1≤W2 / W1≤2; and / or, 1≤W2 / W3≤2.

3. The heat exchanger according to claim 1, characterized in that, The first side profile (11) includes a first leeward side profile (111) and a first windward side profile (112), the second side profile (21) includes a second leeward side profile (211) and a second windward side profile (212), and the third side profile (31) includes a third leeward side profile (311) and a third windward side profile (312). Let the midpoint of the line connecting the upper endpoint G3 of the first windward profile (112) and the lower endpoint G4 of the third windward profile (312) be the reference point F. Let the first angle of the second leeward profile (211) corresponding to the reference point F be d1, the second angle of the first leeward profile (111) corresponding to the reference point F be d2, and the third angle of the third leeward profile (311) corresponding to the reference point F be d3. 5°≤d1≤160°; and / or, 10°≤d2≤100°; and / or, 15°≤d3≤100°。 4. The heat exchanger according to claim 3, characterized in that, 10°≤d1≤40°; and / or, 35°≤d2≤65°; and / or, 45°≤d3≤75°。 5. The heat exchanger according to claim 4, characterized in that, 0.4 ≤ d1 / d2 ≤ 0.6; and / or, 0.3≤d1 / d3≤0.

5.

6. The heat exchanger according to claim 3, characterized in that, d2≠d3, and, 20°≤d1≤50°; and / or, 12°≤d2≤42°; and / or, 40°≤d3≤80°。 7. The heat exchanger according to claim 6, characterized in that, 1.2≤d1 / d2≤1.4; and / or, 0.45≤d1 / d3≤0.

7.

8. The heat exchanger according to claim 1, characterized in that, The angle between the first windward profile line (112) and the second windward profile line (212) is the first plate segment angle α, and the angle between the second windward profile line (212) and the third windward profile line (312) is the second plate segment angle β. α ≥ 100°; and / or, β≥100°。 9. The heat exchanger according to claim 8, characterized in that, α≤170°; and / or, β≤170°。 10. An indoor unit for an air conditioner, characterized in that, Including the heat exchanger with arcuate fins as described in any one of claims 1 to 9.

11. The indoor unit of the air conditioner according to claim 10, characterized in that, Also includes: The volute includes a receiving cavity (417) and an air outlet (46). The receiving cavity (417) is used to install an indoor fan (5), and the air outlet (46) is connected to the outlet (4171) of the receiving cavity (417). A heat exchanger (6) is disposed in the air outlet (46). The midpoint of the longitudinal section of the outlet (4171) of the accommodating cavity (417) is the reference point H. The second windward profile line (212) of the middle wing segment (2) corresponds to the reference point H at an angle of c1. The first windward profile line (112) of the upper wing segment (1) corresponds to the reference point H at an angle of c2. The third windward profile line (312) of the lower wing segment (3) corresponds to the reference point H at an angle of c3. 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.

12. The indoor unit of the air conditioner according to claim 11, characterized in that, The air outlet (46) includes a first diffuser (411), and the fins (64) include a windward profile line (641). The first diffuser (411) extends toward the windward profile line (641). The intersection point of the extension direction of the first diffuser plate (411) and the windward profile line (641) is T1, the length between T1 and the nearest endpoint of the windward profile line (641) is t1, and the total length of the windward profile line (641) is t, where 5% ≤ t1 / t ≤ 30%.

13. The indoor unit of the air conditioner according to claim 12, characterized in that, The air outlet (46) includes a first air outlet (44) and a second air outlet (45). The first air outlet (44) is connected to the outlet (4171) of the receiving cavity (417), and the cross-sectional area of ​​the gas flow in the first air outlet (44) gradually increases along the air outlet direction. The second air outlet (45) is connected to the outlet (441) of the first air outlet (44) and is used to install a heat exchanger (6). At least a portion of the cross-sectional area of ​​the gas flow in the second air outlet (45) is larger than the maximum cross-sectional area of ​​the gas flow in the first air outlet (44). The first air outlet (44) includes a first diffuser plate (411) and a second diffuser plate (412), and 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 extension directions of the third diffuser plate (413) and the first diffuser plate (411) is [insert angle here]. The fourth diffuser plate (414) is connected to the second diffuser plate (412) and extends downwards. The angle between the extending directions of the fourth diffuser plate (414) and the second diffuser plate (412) is [angle not specified]. The fifth diffuser plate (415) is connected to the third diffuser plate (413) and extends downwards. The angle between the extending directions of the fifth diffuser plate (415) and the third diffuser plate (413) is... The sixth diffuser plate (416) is connected to the fourth diffuser plate (414) and extends upwards. The angle between the extending directions of the sixth diffuser plate (416) and the fourth diffuser plate (414) is... in, And / or, And / or, And / or,

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