Heat exchanger

Abstract

The utility model provides a heat exchanger which comprises a first heat exchanger core provided with a plurality of first heat exchange tubes arranged side by side, a first fin structure and a second fin structure. The second heat exchanger core body is provided with a plurality of second heat exchange pipes which are arranged side by side, and the first ends of the first heat exchange pipes communicate with the first ends of the second heat exchange pipes in a one-to-one mode, so that the first heat exchanger core body communicates with the second heat exchanger core body; the length tl of the second heat exchanger core body is smaller than the length TL of the first heat exchanger core body, and the second heat exchanger core body is located on one side of the first heat exchanger core body in the thickness direction; the first fin structure is located in a first area where the first heat exchanger core and the second heat exchanger core are stacked in the thickness direction of the first heat exchanger core and connected with the second heat exchange pipe. The second fin structure is located in a second area which is not stacked with the second heat exchanger core body in the thickness direction of the first heat exchanger core body. Therefore, the fluid circulation resistance and the energy consumption and noise during heat dissipation can be reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of heat exchange products, in particular to a heat exchanger. BACKGROUND

[0002] In order to increase the heat exchange area, the existing tube-fin heat exchanger generally adopts the form of multiple rows of bent flat tubes, forming two heat exchanger cores in parallel, each of which is provided with fins. One fluid (such as refrigerant) flows inside the heat exchanger core, and the other fluid (such as air) flows between the fins outside the two heat exchanger cores, so that the two fluids transfer heat through the tube wall and the fins of the heat exchanger core. However, since a large number of fins are arranged on each heat exchanger core, and the fins on the two heat exchanger cores are misaligned to some extent, the ventilation positions of the two heat exchanger cores are misaligned, that is, the ventilation position of one heat exchanger core is blocked by the fins of the other heat exchanger core, thereby increasing the fluid flow resistance, the energy consumption and the noise during heat dissipation. SUMMARY

[0003] An object of the present application is to provide a heat exchanger which can avoid the accumulation of pollutants and improve the corrosion resistance and service life of the product.

[0004] In order to achieve the above object, the present application provides the following technical scheme:

[0005] A heat exchanger comprises:

[0006] a first heat exchanger core having multiple first heat exchange tubes arranged in parallel, and a first fin structure and a second fin structure connected to the first heat exchange tubes;

[0007] a second heat exchanger core having multiple second heat exchange tubes arranged in parallel, the first ends of the multiple first heat exchange tubes being in one-to-one communication with the first ends of the multiple second heat exchange tubes, so that the first heat exchanger core and the second heat exchanger core are in communication;

[0008] wherein the length tl of the second heat exchanger core is less than the length TL of the first heat exchanger core, and the second heat exchanger core is located on one side of the first heat exchanger core in the thickness direction; the first fin structure is located in a first area of the first heat exchanger core in the thickness direction which is laminated with the second heat exchanger core, and is connected to the second heat exchange tubes; and the second fin structure is located in a second area of the first heat exchanger core in the thickness direction which is not laminated with the second heat exchanger core.

[0009] Optionally, the included angle between the first heat exchanger core and the second heat exchanger core is α, satisfying 0°≤α≤45°, and 0.15

[0010] Optionally, in the length direction of the first heat exchanger core, the pitch of the first fin structure is FP, the pitch of the second fin structure is fp, and 0.5≤fp / FP≤3 is satisfied.

[0011] Optionally, in the length direction of the first heat exchanger core, the size of the first fin structure is FL, the size of the second fin structure is fl, and 0.3≤(FL+fl) / TL≤1 and 0.5≤FL / tl<1 are satisfied.

[0012] Optionally, in the thickness direction of the first heat exchanger core, the size of the first fin structure is FW, the size of the second fin structure is fw, and 0.5≤fw / FW≤1 is satisfied.

[0013] Optionally, the size of the first heat exchanger tube in the thickness direction of the first heat exchanger core is TW, the size of the second heat exchanger tube in the thickness direction of the second heat exchanger core is tw, the center distance of the first heat exchanger core and the second heat exchanger core is D, and 0.7≤FW / (D+TW / 2+tw / 2)≤2 is satisfied.

[0014] Optionally, the first fin structure or the second fin structure comprises at least one of corrugated fins and flat fins.

[0015] Optionally, the first fin structure and the second fin structure adopt different windowing structures and / or pitches.

[0016] Optionally, the first heat exchanger core comprises a first header pipe, and the plurality of first heat exchanger tubes are arranged along the axial direction of the first header pipe and are in communication with the first header pipe; the second heat exchanger core comprises a second header pipe, and the plurality of second heat exchanger tubes are arranged along the axial direction of the second header pipe and are in communication with the second header pipe.

[0017] Optionally, the first header pipe serves as an outlet end, and the second header pipe serves as an inlet end; the first heat exchanger core is located on the front side of the second heat exchanger core, so that the external fluid passes through the first heat exchanger core and the second heat exchanger core in sequence.

[0018] Optionally, in the length direction of the first heat exchanger core, the first fin structure and the second fin structure are respectively located on both sides of the second header pipe; in the thickness direction of the first heat exchanger core, the second fin structure extends and exceeds the side surface of the second header pipe close to the first heat exchanger core.

[0019] Optionally, in the thickness direction of the first heat exchanger core, the size of the second fin structure is greater than the size of the first heat exchange tube, and the first fin structure extends and does not exceed the side of the second header close to the first heat exchanger core.

[0020] Optionally, the second fin structure comprises a plurality of flat fin plates arranged along the length direction of the first heat exchanger core; in the thickness direction of the first heat exchanger core, the flat fin plates extend and exceed the side of the second header close to the first heat exchanger core.

[0021] Optionally, the included angle between the flat fin plate and the length direction of the first heat exchanger core is a right angle or an acute angle.

[0022] Optionally, the second ends of the plurality of second heat exchange tubes are arranged in a direction away from the first heat exchanger core, so that the second header is located on one side in the thickness direction of the second heat exchanger core.

[0023] Optionally, among the first fin structure and the second fin structure, at least the second fin structure comprises a flat fin plate, and a drainage groove is arranged on the leeward side or the low side of the flat fin plate to block and guide the condensed water on the flat fin plate.

[0024] Optionally, a fluid distribution device is arranged in the first header and / or the second header.

[0025] Optionally, the first heat exchange tube and the second heat exchange tube are integrally formed and are bent from a flat tube workpiece.

[0026] Optionally, when the first fin structure and / or the second fin structure comprises a corrugated fin, a plurality of first heat exchange tubes and a plurality of corrugated fins are arranged alternately, so that a corrugated fin is arranged between two adjacent first heat exchange tubes.

[0027] When the first fin structure and / or the second fin structure comprises a flat fin plate, the flat fin plate comprises a fin body and a plurality of heat exchange tube grooves formed in the fin body, the plurality of first heat exchange tubes are arranged in the plurality of heat exchange tube grooves, and a plurality of the flat fin plates are arranged along the length direction of the first heat exchange tube.

[0028] Optionally, the first fin structure comprises a corrugated fin, the corrugated fin is arranged between adjacent first heat exchange tubes on one side in the thickness direction of the first heat exchanger core, and the corrugated fin is arranged between adjacent second heat exchange tubes on the other side in the thickness direction of the first heat exchanger core.

[0029] Optionally, the first fin structure includes a flat fin, and at least some of the heat exchange tube slots of the flat fin are simultaneously provided with a first heat exchange tube and a second heat exchange tube.

[0030] The heat exchanger provided in this application has a first fin structure connecting a first heat exchange tube and a second heat exchange tube. As a common fin of the first heat exchanger core and the second heat exchanger core, it can simultaneously improve the heat dissipation performance of the first heat exchanger core and the second heat exchanger core. Moreover, the fins of the first heat exchanger core and the second heat exchanger core are in the same position, so that the ventilation positions of the two heat exchanger cores are not misaligned, thereby reducing fluid flow resistance, as well as energy consumption and noise during heat dissipation.

[0031] Since the first fin structure connects both the first and second heat exchange tubes, during processing, the flat tube workpiece can be bent first to form a bent and connected first and second heat exchange tube. Then, the fins are welded in the brazing furnace to connect the first fin structure to the first and second heat exchange tubes. Compared to the traditional method of assembling a single row of heat exchangers, brazing them in the furnace, and then bending them to form a multi-row heat exchanger, this method significantly reduces the space occupied by the heat exchanger in the brazing furnace, improves production efficiency, and reduces production costs.

[0032] In addition to the first finned structure, the first heat exchanger tube is also connected to a second finned structure. This second finned structure enhances the design flexibility of the heat exchanger. Without altering the length ratio of the first and second heat exchanger cores, the heat exchange intensity of the first and second regions of the first heat exchanger core can be adjusted by regulating the fin density of the first and second finned structures, thereby regulating the relationship between heat exchange and condensate flow. Furthermore, the first and second finned structures can employ different fin specifications. For example, the first finned structure can be designed to improve heat exchange performance, while the second finned structure can be designed to improve drainage performance, allowing condensate to be quickly discharged through the second finned structure while maintaining heat exchange capacity. Attached Figure Description

[0033] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this application. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.

[0034] Figure 1 This is a perspective view of the heat exchanger shown in the first embodiment;

[0035] Figure 2 This is a side view of the heat exchanger shown in the first embodiment;

[0036] Figure 3 A perspective view of the corrugated fins shown in some embodiments;

[0037] Figure 4 A perspective view of a flat fin as shown in some embodiments;

[0038] Figure 5 This is a front view of a flat fin shown in some embodiments;

[0039] Figure 6 A schematic diagram showing the position of a heat exchanger relative to the wind direction in some embodiments;

[0040] Figure 7 A graph showing the relationship between the heat exchange performance Q of the heat exchanger and the condensate flow rate W of the first heat exchanger core in some embodiments;

[0041] Figure 8 This is a perspective view of the heat exchanger shown in the second embodiment;

[0042] Figure 9 A side view of the heat exchanger shown in the second embodiment;

[0043] Figure 10 A perspective view of the heat exchanger shown in the third embodiment;

[0044] Figure 11 A side view of the heat exchanger shown in the third embodiment;

[0045] Figure 12 This is a perspective view of the heat exchanger shown in the fourth embodiment;

[0046] Figure 13 A side view of the heat exchanger shown in the fourth embodiment;

[0047] Figure 14 This is a perspective view of the heat exchanger shown in the fifth embodiment;

[0048] Figure 15 This is a side view of the heat exchanger shown in the fifth embodiment;

[0049] Figure 16 A perspective view of the heat exchanger shown in the sixth embodiment;

[0050] Figure 17 A side view of the heat exchanger shown in the sixth embodiment;

[0051] Figure 18 This is a perspective view of the heat exchanger shown in the seventh embodiment;

[0052] Figure 19 A side view of the heat exchanger shown in the seventh embodiment;

[0053] Figure 20 This is a perspective view of the heat exchanger shown in the eighth embodiment;

[0054] Figure 21 This is a side view of the heat exchanger shown in the eighth embodiment.

[0055] In the figure: 1. First heat exchange tube; 2. Second heat exchange tube; 3. First fin structure; 4. Second fin structure; 5. First manifold; 6. Second manifold; 7. Drainage trough; 8. Heat exchange tube trough. Detailed Implementation

[0056] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0057] like Figures 1-21 As shown in the illustration, this application provides a heat exchanger, including a first heat exchanger core and a second heat exchanger core. One of the first and second heat exchanger cores has an inlet, and the other has an outlet. That is, one of the first and second heat exchanger cores serves as the inlet heat exchanger core, and the other as the outlet heat exchanger core. An internal fluid flows through the interior of the first and second heat exchanger cores, thereby achieving heat exchange with an external fluid. For example, the internal fluid is a refrigerant, and the external fluid is air.

[0058] Both the first and second heat exchanger cores are plate-like structures with length, width, and thickness directions. The length of the second heat exchanger core is shorter than that of the first heat exchanger core, and the second heat exchanger core is located on one side of the first heat exchanger core in the thickness direction, so that the first and second heat exchanger cores partially overlap. Here, the first heat exchanger core is divided into a first region and a second region. The first region overlaps with the second heat exchanger core in the thickness direction of the first heat exchanger core, while the second region does not overlap with the second heat exchanger core in the thickness direction of the first heat exchanger core. When the widths of the first and second heat exchanger cores are the same, the first and second regions are arranged along the length direction of the first heat exchanger core.

[0059] The length direction of the first heat exchanger core and the length direction of the second heat exchanger tube core can be parallel or form an angle. Here, the angle formed by the length direction of the first heat exchanger core and the length direction of the second heat exchanger is defined as α. The length of the first heat exchanger core is TL, and the length of the second heat exchanger core is tl. This scheme satisfies 0°≤α≤45°, and 0.15<tl×cosα / TL≤0.95.

[0060] Extensive experimental research has revealed that, for example Figure 7 The graph showing the relationship between heat exchange performance Q and condensate flow rate W of the inlet heat exchanger core demonstrates that adjusting the heat exchange intensity of the inlet heat exchanger core within a reasonable range can improve the condensate flow rate without affecting the total heat exchange of the heat exchanger. Therefore, adjusting the heat exchange intensity of different heat exchanger cores can solve the problem of water blowing in air conditioning systems.

[0061] According to the principles of heat transfer, the condensate in the inlet heat exchanger core can be adjusted in three ways: firstly, by regulating the heat exchange area of ​​the inlet heat exchanger core, such as by adjusting parameters like the length of the heat exchange tubes; secondly, by adjusting the heat transfer intensity on the air side, such as by adjusting parameters like the fin width or fin density; and thirdly, by adjusting the heat transfer intensity on the refrigerant side. Considering the overall requirements of the heat exchanger, when 0°≤α≤45° and 0.15<tl×cosα / TL≤0.95 are met, the condensate blowing problem of the air conditioning system is eliminated without affecting its heat exchange capacity.

[0062] The first heat exchanger core includes a first heat exchange tube 1, a first fin structure 3, and a second fin structure 4. Multiple first heat exchange tubes 1 are provided and arranged along the width direction of the first heat exchanger core. The first fin structure 3 and the second fin structure 4 are connected to the first heat exchange tubes 1 to improve the heat exchange performance of the first heat exchange tubes 1. Specifically, the first fin structure 3 is located in a first region of the first heat exchanger core, and the second fin structure 4 is located in a second region of the second heat exchanger core.

[0063] The second heat exchanger core includes multiple second heat exchange tubes 2, arranged along the width of the second heat exchanger core. A first fin structure 3 is connected to the second heat exchanger to improve the heat exchange performance of the second heat exchange tubes 2. Each of the first heat exchange tubes 1 and 2 has a first end and a second end. The first ends of the multiple first heat exchange tubes 1 and the first ends of the multiple second heat exchange tubes 2 are connected one-to-one, thus connecting the first heat exchanger core and the second heat exchanger core. The first region is the position on the first heat exchange tube 1 near the first end, and the second region is the position on the first heat exchange tube 1 near the second end.

[0064] It should be noted that the first heat exchanger tube 1 can be directly connected to the second heat exchanger tube 2, or it can be connected to the first heat exchanger tube 1 and the second heat exchanger tube 2 separately through a third-party adapter. Preferably, the first heat exchanger tube 1 and the second heat exchanger tube 2 are integrally formed and processed by bending a flat tube workpiece. Moreover, the length direction of the first heat exchanger core is the length direction of the first heat exchanger tube 1, and the width direction of the first heat exchanger core is the arrangement direction of the multiple first heat exchanger tubes 1; the length direction of the second heat exchanger core is the length direction of the second heat exchanger tube 2, and the width direction of the second heat exchanger core is the arrangement direction of the multiple second heat exchanger tubes 2. The included angle α formed by the first heat exchanger core and the second heat exchanger core is the included angle formed when the first heat exchanger tube 1 and the second heat exchanger tube 2 are connected.

[0065] Thus, the first fin structure 3 connects the first heat exchange tube 1 and the second heat exchange tube 2, serving as a common fin for the first heat exchanger core and the second heat exchanger core. This can simultaneously improve the heat dissipation performance of the first heat exchanger core and the second heat exchanger core. Moreover, the fins of the first heat exchanger core and the second heat exchanger core are in the same position, preventing misalignment of the ventilation positions of the two heat exchanger cores. This can reduce fluid flow resistance, as well as energy consumption and noise during heat dissipation.

[0066] In traditional heat exchanger designs, a gap exists between the fins of the two heat exchanger cores. This gap does not participate in heat exchange and occupies space. Furthermore, air easily escapes from both sides of the gap, failing to participate in the heat exchange of the subsequent heat exchanger cores, leading to reduced heat exchange performance. This necessitates adding sheet metal to both sides of the heat exchanger for sealing, increasing manufacturing costs, material weight, and material costs. In this design, the first heat exchange tube 1 and the second heat exchange tube 2 are connected by a first fin structure 3. This increases the fin area between the first and second heat exchanger cores, expanding the heat exchange area on the air side. Simultaneously, the first fin structure 3 guides air from one heat exchanger core to the other, ensuring sufficient heat exchange and thus improving the overall heat transfer capacity.

[0067] Since the first fin structure 3 connects both the first heat exchange tube 1 and the second heat exchange tube 2, during processing, the flat tube workpiece can be bent first to form a bent and connected first heat exchange tube 1 and second heat exchange tube 2. Then, the fins are welded in the brazing furnace to connect the first fin structure 3 to the first heat exchange tube 1 and the second heat exchange tube 2. Compared to the traditional method of assembling a single row of heat exchangers, brazing them in the furnace, and then bending them to form a multi-row heat exchanger, this method significantly reduces the space occupied by the heat exchangers in the brazing furnace, improves production efficiency, and reduces production costs.

[0068] In addition to the first fin structure 3, the first heat exchange tube 1 is also connected to a second fin structure 4. This second fin structure 4 enhances the design flexibility of the heat exchanger. Without changing the length ratio of the first and second heat exchanger cores, the heat exchange intensity of the first and second regions of the first heat exchanger core can be adjusted by regulating the fin density of the first fin structure 3 and the second fin structure 4, thereby adjusting the relationship between the heat exchange capacity and the condensate flow rate. Furthermore, the first fin structure 3 and the second fin structure 4 can employ fins of different specifications. For example, the first fin structure 3 can be designed to improve heat exchange performance, while the second fin structure 4 can be designed to improve drainage performance, allowing condensate to be quickly discharged through the second fin structure 4 while maintaining heat exchange capacity.

[0069] In some embodiments, along the length of the first heat exchanger core, the pitch of the first fin structure 3 is FP, and the pitch of the second fin structure 4 is fp, satisfying 0.5 ≤ fp / FP ≤ 3. Thus, without changing the length ratio of the first and second heat exchanger cores, the heat transfer intensity can be adjusted by regulating the pitch of the first fin structure 3 and the second fin structure 4. Furthermore, by limiting the pitch ratio of the first fin structure 3 and the second fin structure 4, good overall heat transfer performance of the heat exchanger can be ensured.

[0070] The first fin structure 3 includes multiple first fins, which can be corrugated or flat. The first fin structure 3 can consist only of corrugated fins, only of flat fins, or a combination of corrugated and flat fins. The second fin structure 4 includes multiple second fins, which can also be corrugated or flat. The second fin structure 4 can consist only of corrugated fins, only of flat fins, or a combination of corrugated and flat fins. By adjusting the fin configuration of the first fin structure 3 and the second fin structure 4, the heat exchange effect of the first and second regions on the first heat exchanger core can be adjusted.

[0071] When the first fin structure 3 or the second fin structure 4 is composed of multiple corrugated fins, the multiple corrugated fins are arranged along the width direction of the first heat exchanger core. For example, multiple first heat exchange tubes 1 and multiple corrugated fins are arranged alternately so that corrugated fins are provided between two adjacent first heat exchange tubes 1, and heat is dissipated between the two first heat exchange tubes 1 through one corrugated fin. At the same time, the crests of the corrugated fins are arranged along the length direction of the first heat exchanger core, and the distance between two adjacent crests is the pitch of the first fin structure 3 or the second fin structure 4.

[0072] When the first fin structure 3 includes corrugated fins, the two sides of the corrugated fins in the thickness direction of the first heat exchanger core can be defined as the first side and the second side, respectively. Here, the first side of the corrugated fins is located between two adjacent first heat exchange tubes 1, and the second side of the corrugated fins is located between two adjacent second heat exchange tubes 2. In this way, the corrugated fins are more fully integrated with the first heat exchange tubes 1 and the second heat exchange tubes 2, which is beneficial to improving the heat exchange effect.

[0073] When the first fin structure 3 or the second fin structure 4 is composed of multiple flat fins, the multiple flat fins are arranged along the length direction of the first heat exchanger core, and the spacing between two adjacent flat fins is the pitch of the first fin structure 3 or the second fin structure 4. It should be noted that flat fins do not mean that the fins are completely flat, but rather that the fins are plate-shaped as a whole. This can be understood as the fins having protrusions, recesses, louvers, and other structures.

[0074] The flat fin structure 3 includes a fin body and multiple heat exchanger tube slots 8 formed therein for mounting heat exchanger tubes. Each heat exchanger tube slot 8 can house either a first heat exchanger tube 1 or a second heat exchanger tube 2. When the first fin structure 3 includes a flat fin, both the first and second heat exchanger tubes 1 and 2 can be simultaneously mounted in the same heat exchanger tube slot 8. When the second fin structure 4 includes a flat fin, only the first heat exchanger tube 1 is mounted in the heat exchanger tube slot 8.

[0075] In the preferred embodiment, the first fin structure 3 and the second fin structure 4 employ different window structures and / or pitches, thereby enabling different heat exchange effects for the first fin structure 3 and the second fin structure 4, and allowing for diversified designs to meet different needs. The window structure is a special design for the fins, optimizing the heat exchanger's performance by creating holes or openings of a specific shape and arrangement on the fin surface. The window structure not only alters airflow characteristics but also improves heat transfer efficiency, reduces flow resistance, and enhances overall mechanical strength.

[0076] In some embodiments, along the length of the first heat exchanger core, the dimension of the first fin structure 3 is FL, and the dimension of the second fin structure 4 is fl, satisfying 0.3≤(FL+fl) / TL≤1 and 0.5≤FL / tl<1. Here, FL is the length of the first fin structure 3. When the first fin structure 3 is composed of multiple corrugated fins, FL is the length of a single corrugated fin. When the first fin structure 3 is composed of multiple flat fins, FL is the length of the dimensions formed by the multiple flat fins, and not the length of a single flat fin. fl is the length of the second fin structure 4. When the second fin structure 4 is composed of multiple corrugated fins, fl is the length of a single corrugated fin. When the second fin structure 4 is composed of multiple flat fins, fl is the length of the dimensions formed by the multiple flat fins, and not the length of a single flat fin. In this way, without changing the length ratio of the first heat exchanger core and the second heat exchanger core, the heat transfer intensity can be adjusted by changing the length ratio of the first fin structure 3 to the first heat exchanger core, and the length ratio of the second fin structure 4 to the second heat exchanger core. Moreover, by limiting the lengths of the first fin structure 3 and the second fin structure 4, the overall heat exchanger can be guaranteed to have good heat transfer performance.

[0077] like Figure 2 As shown, in the thickness direction of the first heat exchanger core, the dimension of the first fin structure 3 is FW, and the dimension of the second fin structure 4 is fw, satisfying 0.5 ≤ fw / FW ≤ 1. Where FW is the width of the first fin structure 3, and fl is the width of the second fin structure 4. Figure 3 As shown, when the first fin structure 3 or the second fin structure 4 is composed of corrugated fins, FW and fw are the widths of the corrugated fins. Figure 5 As shown, when the first fin structure 3 or the second fin structure 4 is composed of flat fins, FW and fw are the widths of the flat fins. Thus, without changing the length ratio of the first heat exchanger core and the second heat exchanger core, the heat transfer intensity can be adjusted by changing the width ratio of the first fin structure 3 and the second fin structure 4. Furthermore, by limiting the widths of the first fin structure 3 and the second fin structure 4, good overall heat transfer performance of the heat exchanger can be ensured.

[0078] In this design, the first heat exchange tube 1 has a dimension of TW in the thickness direction of the first heat exchanger core, and the second heat exchange tube 2 has a dimension of tw in the thickness direction of the second heat exchanger core. The center distance between the first and second heat exchanger cores is D, satisfying 0.7 ≤ FW / (D + TW / 2 + tw / 2) ≤ 2. The first and second heat exchange tubes 1 and 2 are formed by bending flat tubes. TW is the width of the first heat exchange tube 1, and tw is the width of the second heat exchange tube 2. Thus, without changing the length ratio of the first and second heat exchanger cores, the heat exchange intensity can be adjusted by changing the widths of the first fin structure 3 and the second fin structure 4, as well as the widths of the first and second heat exchange tubes 1 and 2, which helps ensure good overall heat exchange performance of the heat exchanger.

[0079] In some embodiments, the first heat exchanger core includes a first manifold 5, and the second ends of a plurality of first heat exchange tubes 1 are all connected to the first manifold 5 for flow distribution. The axial direction of the first manifold 5 is aligned with the width direction of the first heat exchanger core, so that the plurality of first heat exchange tubes 1 are arranged along the axial direction of the first manifold 5, which helps to ensure the uniformity of flow distribution among the plurality of first heat exchange tubes 1. The second heat exchanger core includes a second manifold 6, and the second ends of a plurality of second heat exchange tubes 2 are all connected to the second manifold 6 for flow distribution. The axial direction of the second manifold 6 is aligned with the width direction of the second heat exchanger core, so that the plurality of second heat exchange tubes 2 are arranged along the axial direction of the second manifold 6, which helps to ensure the uniformity of flow distribution among the plurality of second heat exchange tubes 2.

[0080] In the preferred embodiment, the first manifold 5 is provided with an outlet so that it can serve as the outlet end of the heat exchanger; the second manifold 6 is provided with an inlet so that it can serve as the inlet end of the heat exchanger. Furthermore, the first heat exchanger core is located on the facing side of the second heat exchanger core, allowing air to pass through both cores sequentially. Thus, during operation, the refrigerant enters through the second manifold 6, passes sequentially through the second heat exchange tube 1 and the second heat exchange tube 2, and exits through the first manifold 5; simultaneously, air passes sequentially through the first heat exchange tube 1 and the second heat exchange tube 2. The air and refrigerant flow in opposite directions, which helps improve heat exchange efficiency.

[0081] The facing side of the second heat exchanger core is the side that first contacts and exchanges heat with the air. For example... Figure 6 As shown, air flows from left to right. During installation, it is necessary to ensure that the first heat exchanger core is upstream of the second heat exchanger core so that the air passes through the first heat exchanger core first and then through the second heat exchanger core.

[0082] Of course, in other designs, the first manifold 5 can be located above the first heat exchanger core, and the second manifold 6 can be located above the second heat exchanger core. Additionally, the first heat exchanger core is positioned downstream of the second heat exchanger core, so that air passes through the second heat exchanger core first, and then through the first heat exchanger core.

[0083] At least one of the first manifold 5 and the second manifold 6 is provided with a fluid distribution device to achieve reasonable distribution of refrigerant. The fluid distribution device can be located at the inlet end, the outlet end, or both the inlet and outlet ends.

[0084] like Figures 1-2 As shown, in the first embodiment, along the length of the first heat exchanger core, the first fin structure 3 and the second fin structure 4 are located on both sides of the second manifold 6. By increasing the distance between the first fin structure 3 and the second fin structure 4, they can avoid the second manifold 6, thereby increasing their heat exchange area. Furthermore, along the thickness of the first heat exchanger core, the second fin structure 4 extends beyond the second manifold 6 and approaches the side of the first heat exchanger core; that is, the right end of the second fin structure 4 is located to the right of the left end of the second manifold 6. By increasing the heat exchange area of ​​the second fin structure 4, the heat dissipation area loss caused by the increased distance between the first fin structure 3 and the second fin structure 4 can be compensated.

[0085] like Figures 8-9 As shown, in the second embodiment, in the thickness direction of the first heat exchanger core, the size of the second fin structure 4 is larger than the size of the first heat exchange tube 1, and the first fin structure 3 extends no more than the side of the second manifold 6 near the first heat exchanger core. That is, the right end of the second fin structure 4 is located to the left of the left end of the second manifold 6. In this way, there is no need to consider the interference between the second fin structure 4 and the second manifold 6, and the distance between the first fin structure 3 and the second fin structure 4 can be minimized as much as possible. It is even possible to make the first fin structure 3 and the second fin structure 4 contact or connect, thereby ensuring that the first fin structure 3 and the second fin structure 4 have a large heat exchange area and heat exchange performance.

[0086] like Figures 10-11As shown, in the third embodiment, in the thickness direction of the first heat exchanger core, the size of the second fin structure 4 is smaller than the size of the first heat exchange tube 1, so that the second fin structure 4 is located between two adjacent first heat exchange tubes 1 and is not exposed in the area between the two first heat exchange tubes 1. This allows the second fin structure 4 to more concentratedly exchange heat in the area between the two first heat exchange tubes 1, and there is no need to consider the interference between the second fin structure 4 and the second manifold 6. This can minimize the distance between the first fin structure 3 and the second fin structure 4, and even allow the first fin structure 3 and the second fin structure 4 to contact or connect, which is beneficial for the installation of the first fin structure 3 and the second fin structure 4.

[0087] In the three embodiments described above, the first fin structure 3 and the second fin structure 4 are configured with the same fin form. For example, both the first fin structure 3 and the second fin structure 4 are composed of multiple corrugated fins, or both are composed of multiple flat fins. The first fin structure 3 and the second fin structure 4 can be arranged at intervals or in contact. The first fin structure 3 and the second fin structure 4 can adopt different window structures and pitches.

[0088] In some embodiments, the second fin structure 4 includes multiple flat fins arranged at intervals along the length of the first heat exchanger core, allowing the second fin structure 4 to avoid the second manifold 6, thereby increasing the heat exchange area of ​​the second fin structure 4. The interval between two adjacent flat fins is the pitch of the second fin structure 4. Furthermore, the flat fins extend beyond the second manifold 6 and approach the side of the first heat exchanger core; that is, the right end of the flat fin is located to the right of the left end of the second manifold 6. By increasing the heat exchange area of ​​the flat fins, the heat dissipation area loss caused by the spaced arrangement of multiple flat fins can be compensated. During use, condensate will be generated on the second heat exchanger core. By arranging the multiple flat fins below the second heat exchanger core, the condensate can flow out along the flat fins, preventing condensate from being blown into the room.

[0089] The angle formed between the flat fins and the length direction of the first heat exchanger core is either a right angle or an acute angle, which can be reasonably set according to different drainage requirements to facilitate the discharge of condensate from the second heat exchanger core. For example, in... Figures 12-13 In the fourth embodiment shown, the flat fins are perpendicular to the length direction of the first heat exchanger core; in such a way... Figures 14-15 In the fifth embodiment shown, the flat fins form an acute angle with the length direction of the first heat exchanger core, and the right end of the flat fins is lower than the left end to facilitate the guidance of condensate to the right side; in such... Figures 16-17In the sixth embodiment shown, the flat fins form an acute angle with the length direction of the first heat exchanger core, and the right end of the flat fins is higher than the left end, so as to guide the condensate to the left side.

[0090] In the three embodiments described above, the first fin structure 3 and the second fin structure 4 are configured with different fin forms, i.e., the first fin structure 3 is composed of multiple corrugated fins. Alternatively, the first fin structure 3 and the second fin structure 4 can be configured with the same fin form, i.e., both the first fin structure 3 and the second fin structure 4 are composed of multiple flat fins. In this case, the flat fins of the first fin structure 3 can be designed based on the characteristics of the flat fins of the second fin structure 4. The first fin structure 3 and the second fin structure 4 can be arranged alternately. The first fin structure 3 and the second fin structure 4 can employ different window structures and pitches.

[0091] In addition, a drainage groove 7 can be provided on the flat fin. This drainage groove 7 is located on the leeward side of the flat fin, so that the condensate on the flat fin is blown by the wind to the drainage groove 7 and finally discharged from the drainage groove 7. Alternatively, the drainage groove 7 is located on the lower side of the flat fin, so that the condensate on the flat fin is guided to the drainage groove 7 under the action of gravity and finally discharged from the drainage groove 7. The drainage groove 7 can be set as a groove that is concave on the upper and lower sides of the flat fin, or it can be set as an upwardly folded flange on the flat fin.

[0092] like Figures 18-19 As shown, in the seventh embodiment, the second ends of the plurality of second heat exchange tubes 2 are bent away from the first heat exchanger core, so that the second manifold 6 is located on one side of the thickness direction of the second heat exchanger core. In this way, the second manifold 6 is away from the first heat exchanger core relative to the second heat exchange tubes 2, which avoids interference between the second fin structure 4 and the second manifold 6, and fully utilizes the windward area of ​​the second heat exchanger core. Moreover, there is no need to consider the interference problem of the second manifold 6. When the first fin structure 3 and the second fin structure 4 adopt the same fin form, the first fin structure 3 and the second fin structure 4 can be substituted for each other, requiring only one fin assembly, reducing assembly time and improving production efficiency. The first fin structure 3 and the second fin structure 4 can both be composed of multiple corrugated fins or multiple flat fins.

[0093] In addition, in conjunction with the seven embodiments described above, such as Figures 20-21In the eighth embodiment shown, the second ends of the plurality of second heat exchange tubes 2 are bent away from the first heat exchanger core; the second fin structure 4 includes a plurality of flat fins, which are spaced apart along the length of the first heat exchanger core. The flat fins extend but do not exceed the side of the second manifold 6 near the first heat exchanger core, i.e., the right end of the flat fin is located to the left of the left end of the second manifold 6; moreover, the flat fins form an acute angle with the length of the first heat exchanger core, and the right end of the flat fins is lower than the left end, so as to guide the condensate to the right side. In other embodiments, the difference from the seventh embodiment described above may be that the flat fins form a right angle with the length of the first heat exchanger core, or the right end of the flat fins is higher than the left end.

[0094] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0095] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

[0096] It should also be noted that in the apparatus, equipment, and methods of this application, the components or steps can be disassembled and / or recombined. These disassemblies and / or recombinations should be considered as equivalent solutions of this application.

[0097] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use this application. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of this application. Therefore, this application is not intended to be limited to the aspects shown herein, but rather to be accorded the widest scope consistent with the principles and novel features disclosed herein.

[0098] It should be understood that the qualifiers “first,” “second,” “third,” “fourth,” “fifth,” and “sixth” used in the description of the embodiments of this application are only used to more clearly illustrate the technical solutions and are not intended to limit the scope of protection of this application.

[0099] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof.

Claims

1. A heat exchanger, characterized by, The application relates to a heat exchanger, comprising: a first heat exchanger core body having a plurality of first heat exchange tubes arranged side by side, and a first fin structure and a second fin structure connected to the first heat exchange tubes; a second heat exchanger core body having a plurality of second heat exchange tubes arranged side by side, the first ends of the plurality of first heat exchange tubes being in one-to-one communication with the first ends of the plurality of second heat exchange tubes, so that the first heat exchanger core body and the second heat exchanger core body are in communication; wherein the length tl of the second heat exchanger core body is less than the length TL of the first heat exchanger core body, and the second heat exchanger core body is located on one side of the first heat exchanger core body in the thickness direction; the first fin structure is located in a first region of the first heat exchanger core body in the thickness direction and is connected to the second heat exchange tubes; and the second fin structure is located in a second region of the first heat exchanger core body in the thickness direction and is not connected to the second heat exchanger core body.

2. The heat exchanger of claim 1, wherein The included angle between the first heat exchanger core body and the second heat exchanger core body is alpha, and satisfies 0 DEG <= alpha <= 45 DEG, and 0.15 < tl * cos alpha / TL <= 0.

95.

3. The heat exchanger of claim 1, wherein In the length direction of the first heat exchanger core body, the pitch of the first fin structure is FP, and the pitch of the second fin structure is fp, and satisfies 0.5 <= fp / FP <= 3.

4. The heat exchanger of claim 1, wherein In the length direction of the first heat exchanger core body, the size of the first fin structure is FL, and the size of the second fin structure is fl, and satisfies 0.3 <= (FL + fl) / TL <= 1, and 0.5 <= FL / tl < 1.

5. The heat exchanger of claim 1, wherein In the thickness direction of the first heat exchanger core body, the size of the first fin structure is FW, and the size of the second fin structure is fw, and satisfies 0.5 <= fw / FW <= 1.

6. The heat exchanger of claim 5, wherein The size of the first heat exchange tube in the thickness direction of the first heat exchanger core body is TW, the size of the second heat exchange tube in the thickness direction of the second heat exchanger core body is tw, the center distance of the first heat exchanger core body and the second heat exchanger core body is D, and satisfies 0.7 <= FW / (D + TW / 2 + tw / 2) <= 2.

7. The heat exchanger of claim 1, wherein The first fin structure or the second fin structure comprises at least one of corrugated fins and flat fins.

8. The heat exchanger of claim 1, wherein The first fin structure and the second fin structure adopt different windowing structures and / or pitches.

9. The heat exchanger of claim 1, wherein The first heat exchanger core body comprises a first header pipe, and the plurality of first heat exchange tubes are arranged along the axial direction of the first header pipe and are in communication with the first header pipe; the second heat exchanger core body comprises a second header pipe, and the plurality of second heat exchange tubes are arranged along the axial direction of the second header pipe and are in communication with the second header pipe.

10. The heat exchanger of claim 9, wherein The first header pipe serves as an outlet end, the second header pipe serves as an inlet end, the first heat exchanger core body is located on the face side of the second heat exchanger core body, so that external fluid passes through the first heat exchanger core body and the second heat exchanger core body in sequence.

11. The heat exchanger of claim 9, wherein In the length direction of the first heat exchanger core, the first fin structure and the second fin structure are respectively located on both sides of the second collecting pipe; in the thickness direction of the first heat exchanger core, the second fin structure extends and exceeds the side of the second collecting pipe close to the first heat exchanger core.

12. The heat exchanger of claim 9, wherein In the thickness direction of the first heat exchanger core, the size of the second fin structure is greater than the size of the first heat exchange tube, and the first fin structure extends and does not exceed the side of the second collecting pipe close to the first heat exchanger core.

13. The heat exchanger of claim 9, wherein The second fin structure comprises a plurality of flat fin plates arranged in the length direction of the first heat exchanger core; in the thickness direction of the first heat exchanger core, the flat fin plates extend and exceed the side of the second collecting pipe close to the first heat exchanger core.

14. The heat exchanger of claim 13, wherein, The included angle between the flat fin plates and the length direction of the first heat exchanger core is a right angle or an acute angle.

15. The heat exchanger of claim 9, wherein, The second ends of the plurality of second heat exchange tubes are arranged in a direction away from the first heat exchanger core, so that the second collecting pipe is located on one side in the thickness direction of the second heat exchanger core.

16. The heat exchanger of claim 1, wherein At least the second fin structure in the first fin structure and the second fin structure comprises a flat fin plate, and a drainage groove is arranged on the leeward side or low side of the flat fin plate to block and guide the condensed water on the flat fin plate.

17. The heat exchanger of claim 9, wherein The first collecting pipe and / or the second collecting pipe is provided with a fluid distribution device.

18. The heat exchanger of claim 1, wherein The first heat exchange tube and the second heat exchange tube are integrally formed and are bent from a flat tube workpiece.

19. The heat exchanger of claim 7, wherein When the first fin structure and / or the second fin structure comprises corrugated fins, a plurality of first heat exchange tubes and a plurality of corrugated fins are alternately arranged, so that a corrugated fin is arranged between two adjacent first heat exchange tubes. When the first fin structure and / or the second fin structure comprises flat fin plates, the flat fin plates comprise fin bodies and a plurality of heat exchange tube grooves formed in the fin bodies, the plurality of first heat exchange tubes are arranged in the plurality of heat exchange tube grooves, and a plurality of the flat fin plates are arranged in the length direction of the first heat exchange tube.

20. The heat exchanger of claim 19, wherein, The first fin structure comprises corrugated fins, the corrugated fins are arranged between adjacent first heat exchange tubes on one side in the thickness direction of the first heat exchanger core, and the corrugated fins are arranged between adjacent second heat exchange tubes on the other side in the thickness direction of the first heat exchanger core.

21. The heat exchanger of claim 19, wherein, The first fin structure comprises flat fin plates, and the first heat exchange tube and the second heat exchange tube are simultaneously arranged in at least some of the heat exchange tube grooves of the flat fin plates.

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