Heat exchanger

Abstract

The present disclosure provides a heat exchanger, including: a first heat exchanger core having a plurality of first heat exchange tubes arranged side by side, and a first fin structure and a second fin structure; a second heat exchanger core having a plurality of second heat exchange tubes arranged side by side, first ends of the plurality of first heat exchange tubes are in one-to-one communication with first ends of the plurality of second heat exchange tubes, so that the first heat exchanger core is in communication with the second heat exchanger core; a length t1 of the second heat exchanger core is smaller than a 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 a thickness direction; the first fin structure is located in a first region of the first heat exchanger core that overlaps with the second heat exchanger core in the thickness direction and the first fin structure is connected with the second heat exchange tubes; and the second fin structure is located in a second region of the first heat exchanger core that does not overlap with the second heat exchanger core in the thickness direction. In this way, the fluid flow resistance and the energy consumption and noise during heat dissipation are reduced.

Description

CROSS-REFERENCE TO RELATED APPLICATIONS

[0001] This application claims foreign priority benefits under 35 U.S.C. § 119 to Chinese Patent Application No. 202510229358.X filed on Feb. 27, 2025, the content of which is hereby incorporated by reference in its entirety.TECHNICAL FIELD

[0002] The present disclosure relates to the technical field of heat exchange products, and in particular, to a heat exchanger.BACKGROUND

[0003] In order to increase the heat exchange area, existing tube-fin heat exchangers generally adopt a form of two heat exchanger cores arranged side by side, which is formed by bending a plurality of rows of flat tubes, wherein fins are provided on each heat exchanger core. One fluid (such as a refrigerant) flows inside the heat exchanger cores, and another fluid (such as air) flows between the fins outside the two heat exchanger cores, thereby enabling heat transfer between the two fluids through the tube walls and fins of the heat exchanger cores. However, since a large number of fins are provided on each heat exchanger core, and the fins on the two heat exchanger cores are dislocated to a certain extent so that the ventilation positions of the two heat exchanger cores are dislocated, 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 and the energy consumption and noise during heat dissipation.SUMMARY

[0004] One objective of the present disclosure is to provide a heat exchanger that can prevent the accumulation of pollutants and improve the corrosion-resistant service life of the product.

[0005] In order to achieve the above objective, the present disclosure provides the following technical solutions.

[0006] A heat exchanger includes:

[0007] a first heat exchanger core 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;

[0008] a second heat exchanger core having a plurality of second heat exchange tubes arranged side by side, first ends of the plurality of first heat exchange tubes are in one-to-one communication with first ends of the plurality of second heat exchange tubes, so that the first heat exchanger core is in communication with the second heat exchanger core;

[0009] wherein a length t1 of the second heat exchanger core is smaller than a 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 a thickness direction; the first fin structure is located in a first region of the first heat exchanger core that overlaps with the second heat exchanger core in the thickness direction and the first fin structure is connected with the second heat exchange tubes; and the second fin structure is located in a second region of the first heat exchanger core that does not overlap with the second heat exchanger core in the thickness direction.

[0010] Optionally, an angle between the first heat exchanger core and the second heat exchanger core is α, wherein 0°≤α≤45°, and 0.15<t1×cos α / TL≤0.95.

[0011] Optionally, in a length direction of the first heat exchanger core, a pitch of the first fin structure is FP, and a pitch of the second fin structure is fp, wherein 0.5≤fp / FP≤3.

[0012] Optionally, in a length direction of the first heat exchanger core, a size of the first fin structure is FL, and a size of the second fin structure is f1, wherein 0.3≤(FL+f1) / TL≤1, and 0.5≤FL / t1<1.

[0013] Optionally, in the thickness direction of the first heat exchanger core, a size of the first fin structure is FW, and a size of the second fin structure is fw, wherein 0.5≤fw / FW≤1.

[0014] Optionally, a size of the first heat exchange tube in the thickness direction of the first heat exchanger core is TW, a size of the second heat exchange tube in a thickness direction of the second heat exchanger core is tw, and a center distance between the first heat exchanger core and the second heat exchanger core is D, wherein 0.7≤FW / (D+TW / 2+tw / 2)≤2.

[0015] Optionally, the first fin structure or the second fin structure includes at least one of a corrugated fin and a plate fin.

[0016] Optionally, the first fin structure and the second fin structure adopt different louver structures and / or pitches.

[0017] Optionally, the first heat exchanger core includes a first header, and the plurality of first heat exchange tubes are arranged in an axial direction of the first header and are all in communication with the first header; the second heat exchanger core includes a second header, and the plurality of second heat exchange tubes are arranged in an axial direction of the second header and are all in communication with the second header.

[0018] Optionally, the first header serves as an outlet end, and the second header serves as an inlet end; the first heat exchanger core is located on a windward side of the second heat exchanger core, so that external fluid passes through the first heat exchanger core and the second heat exchanger core in sequence.

[0019] Optionally, in a length direction of the first heat exchanger core, the first fin structure and the second fin structure are located on opposite sides of the second header, respectively; and, in the thickness direction of the first heat exchanger core, the second fin structure extends and exceeds a side of the second header close to the first heat exchanger core.

[0020] Optionally, in the thickness direction of the first heat exchanger core, a size of the second fin structure is larger than that of the first heat exchange tube, and the first fin structure extends without exceeding a side of the second header close to the first heat exchanger core.

[0021] Optionally, the second fin structure includes a plurality of plate fins arranged in a length direction of the first heat exchanger core; the plate fins extend and exceed a side of the second header close to the first heat exchanger core in the thickness direction of the first heat exchanger core.

[0022] Optionally, an angle formed by the plate fin and the length direction of the first heat exchanger core is a right angle or an acute angle.

[0023] Optionally, second ends of the plurality of second heat exchange tubes are bent away from the first heat exchanger core, so that the second header is located on one side of the second heat exchanger core in the thickness direction.

[0024] Optionally, at least the second fin structure of the first fin structure and the second fin structure includes a plate fin, and a drainage groove is provided in a leeward side or a lower side of the plate fin to block and guide condensed water on the plate fin.

[0025] Optionally, a fluid distribution device is provided in the first header and / or the second header.

[0026] Optionally, the first heat exchange tube and the second heat exchange tube are integrally formed and bent from a flat tube workpiece.

[0027] Optionally, provided that the first fin structure and / or the second fin structure includes corrugated fins, the plurality of first heat exchange tubes and the plurality of corrugated fins are arranged alternately, so that the corrugated fin are provided between two adjacent first heat exchange tubes; provided that the first fin structure and / or the second fin structure includes plate fins, the plate fin includes a fin body and a plurality of heat exchange tube slots formed in the fin body, the plurality of first heat exchange tubes are arranged in the plurality of heat exchange tube slots, and the plurality of plate fins are arranged in a length direction of the first heat exchange tubes.

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

[0029] Optionally, the first fin structure includes plate fins, and at least some of the plurality of heat exchange tube slots of the plate fins are simultaneously provided with both the first heat exchange tubes and the second heat exchange tubes.

[0030] According to the heat exchanger provided by the present disclosure, a first fin structure is connected to the first heat exchange tubes and the second heat exchange tubes, serving as a common fin for the first heat exchanger core and the second heat exchanger core, which 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 fins of the second heat exchanger core are in the same position, so that the ventilation positions of the two heat exchanger cores will not be dislocated, thereby reducing the fluid flow resistance and the energy consumption and noise during heat dissipation.

[0031] Since the first fin structure is connected to the first heat exchange tubes and the second heat exchange tubes simultaneously, during processing, the flat tube workpiece may be firstly bent to form bent and communicated first heat exchange tubes and second heat exchange tubes, and then the fins are brazed in a brazing furnace so that the first fin structure is connected to the first heat exchange tubes and the second heat exchange tubes. Compared with the conventional solutions in which a plurality of rows of heat exchangers is formed by the following steps of: first, assembling a single row of heat exchangers, second, brazing it in a brazing furnace and then bending it. This solution can greatly reduce the space occupied by the heat exchanger in the brazing furnace, improve production efficiency and reduce production costs.

[0032] In addition to the first fin structure, the first heat exchange tubes are also connected with a second fin structure. In this way, the design flexibility of the heat exchanger can be improved by the second fin structure. On the premise that a length ratio of the first heat exchanger core to the second heat exchanger core remains unchanged, the heat exchange intensities of the first region and the second region on the first heat exchanger core may be adjusted by adjusting the fin densities of the first fin structure and the second fin structure, thereby adjusting the relationship between the heat exchange capacity and the condensed water amount. On the other hand, the first fin structure and the second fin structure may adopt fins of different specifications. For example, the first fin structure is designed to improve the heat exchange performance, and the second fin structure is designed to improve the drainage performance, so that the condensed water of the heat exchanger can be quickly discharged by the second fin structure while maintaining the heat exchange capacity.BRIEF DESCRIPTION OF THE DRAWINGS

[0033] To describe the technical solutions in embodiments of the present disclosure or in the prior art more clearly, the following briefly describes the accompanying drawings required for describing the embodiments or the prior art. It is clear that the accompanying drawings in the following descriptions are merely some embodiments of the present disclosure, and those of ordinary skill in the art may still derive other drawings from the provided accompanying drawings without creative efforts.

[0034] FIG. 1 is a perspective view of a heat exchanger shown according to a first embodiment;

[0035] FIG. 2 is a side view of the heat exchanger shown according to the first embodiment;

[0036] FIG. 3 is a perspective view of a corrugated fin shown according to some embodiments;

[0037] FIG. 4 is a perspective view of a plate fin shown according to some embodiments;

[0038] FIG. 5 is a front view of the plate fin shown according to some embodiments;

[0039] FIG. 6 is a schematic view of a position of the heat exchanger relative to a wind direction shown according to some embodiments;

[0040] FIG. 7 is a graph showing a relationship between the heat exchange performance Q of the heat exchanger and the condensed water amount W of a first heat exchanger core shown according to some embodiments;

[0041] FIG. 8 is a perspective view of a heat exchanger according to a second embodiment;

[0042] FIG. 9 is a side view of the heat exchanger according to the second embodiment;

[0043] FIG. 10 is a perspective view of a heat exchanger according to a third embodiment;

[0044] FIG. 11 is a side view of the heat exchanger according to the third embodiment;

[0045] FIG. 12 is a perspective view of a heat exchanger according to a fourth embodiment;

[0046] FIG. 13 is a side view of the heat exchanger according to the fourth embodiment;

[0047] FIG. 14 is a perspective view of a heat exchanger according to a fifth embodiment;

[0048] FIG. 15 is a side view of the heat exchanger according to the fifth embodiment;

[0049] FIG. 16 is a perspective view of a heat exchanger according to the sixth embodiment;

[0050] FIG. 17 is a side view of the heat exchanger according to the sixth embodiment;

[0051] FIG. 18 is a perspective view of a heat exchanger according to a seventh embodiment;

[0052] FIG. 19 is a side view of the heat exchanger according to the seventh embodiment;

[0053] FIG. 20 is a perspective view of a heat exchanger according to an eighth embodiment;

[0054] FIG. 21 is a side view of the heat exchanger according to the eighth embodiment.

[0055] In the figures, 1: first heat exchange tube; 2: second heat exchange tube; 3: first fin structure; 4: second fin structure; 5: first header; 6: second header; 7: drainage groove; 8: heat exchange tube slot.DETAILED DESCRIPTION OF EMBODIMENTS

[0056] The technical solutions in the embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the embodiments of the present disclosure. Apparently, the embodiments described are merely some rather than all of the embodiments of the present disclosure. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present disclosure without creative efforts shall fall within the scope of protection of the present disclosure.

[0057] As shown in FIGS. 1 to 21, according to the embodiments of the present disclosure, there is provided a heat exchanger including a first heat exchanger core and a second heat exchanger core. One of the first heat exchanger core and the second heat exchanger core is provided with an inlet, and the other is provided with an outlet, that is, one of the first heat exchanger core and the second heat exchanger core serves as an inlet heat exchanger core, and the other serves as an outlet heat exchanger core. The internal fluid flows through inside of the first heat exchanger core and the second heat exchanger core, thereby realizing heat exchange with the external fluid. For example, the internal fluid is a refrigerant, and the external fluid is air.

[0058] Both the first heat exchanger core and the second heat exchanger core are configured as plate-shaped structures having a length direction, a width direction and a thickness direction, wherein a length of the second heat exchanger core is smaller 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 heat exchanger core and the second heat exchanger core overlap partially. 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, and the second region does not overlap with the second heat exchanger core in the thickness direction of the first heat exchanger core. When a width of the first heat exchanger core is kept consistent with that of the second heat exchanger core, the first region and the second region are arranged in 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 core may be parallel or form an angle. Here, an angle formed by the length direction of the first heat exchanger core and the length direction of the second heat exchanger core is defined as a, a length of the first heat exchanger core is TL, and a length of the second heat exchanger core is t1, wherein 0°≤α≤45°, and 0.15<t1×cos a / TL≤0.95.

[0060] After a large number of experimental studies, it is found that adjustment of the heat exchange intensity of the inlet heat exchanger core within a reasonable range can improve the condensed water amount of the inlet heat exchanger core without affecting the total heat exchange capacity of the heat exchanger, from a relationship diagram of the heat exchange performance Q and the condensed water amount W of the inlet heat exchanger core shown in FIG. 7. Therefore, the water blowing problem of an air conditioning system can be solved by adjusting the heat exchange intensity of different heat exchanger cores.

[0061] According to the principles of heat transfer, on the one hand, the condensed water of the inlet heat exchanger core can be adjusted by adjusting the heat exchange area of the inlet heat exchanger core, for example by adjusting parameters such as the lengths of the heat exchange tubes of the inlet heat exchanger core; on the other hand, the condensed water of the heat exchanger core at inlet side may be adjusted by adjusting the heat exchange intensity at air side, for example by adjusting parameters such as the width of the fin or the density of the fins; on another hand, the condensed water of the heat exchanger core at inlet side may also be adjusted by adjusting the heat exchange intensity at refrigerant side. According to the overall requirements of the heat exchanger, when 0°≤α≤45° and 0.15<t1×cos α / TL≤0.95, the water blowing problem of the air conditioning system is eliminated without affecting the heat exchange capacity of the air conditioning system.

[0062] The first heat exchanger core includes a first heat exchange tube 1, a first fin structure 3 and a second fin structure 4. A plurality of first heat exchange tubes 1 are provided and arranged in 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. The first fin structure 3 is provided in the first region of the first heat exchanger core, and the second fin structure 4 is provided in the second region of the first heat exchanger core.

[0063] The second heat exchanger core includes a second heat exchange tube 2. A plurality of second heat exchange tubes 2 are provided and arranged in the width direction of the second heat exchanger core. The first fin structure 3 is connected to the second heat exchange tubes to improve the heat exchange performance of the second heat exchange tubes 2. the first heat exchange tube 1 and the second heat exchange tube 2 each have a first end and a second end, and the first ends of the plurality of first heat exchange tubes 1 are in one-to-one communication with the first ends of the plurality of second heat exchange tubes 2, so that the first heat exchanger core is in communication with the second heat exchanger core. The above-mentioned first region is the position on the first heat exchange tube 1 close to the first end, and the second region is the position on the first heat exchange tube 1 close to the second end.

[0064] It should be noted that the first heat exchange tube 1 may be directly connected to the second heat exchange tube 2, or may be connected to the second heat exchange tube 2 via a third-party adapter. Preferably, the first heat exchange tube 1 and the second heat exchange tube 2 are integrally formed by bending a flat tube workpiece. Moreover, the length direction of the first heat exchanger core is a length direction of the first heat exchange tube 1, and the width direction of the first heat exchanger core is an arrangement direction of the plurality of first heat exchange tubes 1; the length direction of the second heat exchanger core is a length direction of the second heat exchange tube 2, and the width direction of the second heat exchanger core is an arrangement direction of the plurality of second heat exchange tubes 2. The angle a formed by the first heat exchanger core and the second heat exchanger core is the angle formed when the first heat exchange tube 1 and the second heat exchange tube 2 are connected.

[0065] Thus, the first fin structure 3 is connected to 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, which 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 fins of the second heat exchanger core are in the same position, so that the ventilation positions of the two heat exchanger cores will not be dislocated, thereby reducing the fluid flow resistance and the energy consumption and noise during heat dissipation.

[0066] In the conventional heat exchanger solutions, there is a gap between the fins of the two heat exchanger cores. The gap does not participate in heat exchange and occupies space, air is easy to flow out from both sides of the gap, and the outflowing air does not participate in the heat exchange of the subsequent heat exchanger core, resulting in a decrease in the heat exchange performance. Therefore, it is necessary to add metal plates on both sides of the heat exchanger for sealing, which increases processing costs, material weight and material costs. However, in the present solution, the first heat exchange tube 1 and the second heat exchange tube 2 are connected via the first fin structure 3, which can increase the fin area between the first heat exchanger core and the second heat exchanger core and increase the heat exchange area at air side, at the same time, the first fin structure 3 can guide air from one heat exchanger core to another heat exchanger core, making the air fully exchange heat, thereby improving the heat exchange capacity.

[0067] Since the first fin structure 3 is connected to the first heat exchange tube 1 and the second heat exchange tube 2 simultaneously, during processing, a flat tube workpiece may be firstly bent to form bent first heat exchange tube 1 and second heat exchange tube 2, which are communicated with each other, and then the fins are brazed in a brazing furnace so that the first fin structure 3 is connected to the first heat exchange tube 1 and the second heat exchange tube 2. Compared with the conventional solutions in which a plurality of rows of heat exchangers is formed by the following steps of: first, assembling a single row of heat exchangers, second, brazing it in a brazing furnace and then bending it, the present solution can greatly reduce the space occupied by the heat exchanger in the brazing furnace, improve production efficiency and reduce production costs.

[0068] In addition to the first fin structure 3, the first heat exchange tube 1 is also connected with a second fin structure 4. In this way, the design flexibility of the heat exchanger can be improved by the second fin structure 4. On the premise that a length ratio of the first heat exchanger core to the second heat exchanger core remains unchanged, the heat exchange intensity of the first region and the second region on the first heat exchanger core may be adjusted by adjusting the fin densities of the first fin structure 3 and the second fin structure 4, thereby adjusting a relationship between the heat exchange capacity and the condensed water amount. On the other hand, the first fin structure 3 and the second fin structure 4 may adopt fins of different specifications. For example, the first fin structure 3 is designed to improve heat exchange performance, and the second fin structure 4 is designed to improve drainage performance, so that the condensed water of the heat exchanger can be quickly discharged through the second fin structure 4 while maintaining the heat exchange capacity.

[0069] In some embodiments, in the length direction of the first heat exchanger core, a pitch of the first fin structure 3 is FP, and a pitch of the second fin structure 4 is fp, wherein 0.5≤fp / FP≤3. In this way, on the premise that the length ratio of the first heat exchanger core to the second heat exchanger core remains unchanged, the heat exchange intensity may be adjusted by adjusting the pitches of the first fin structure 3 and the second fin structure 4, moreover, it can be ensured that the overall heat exchanger has good heat exchange performance by limiting the pitch ratio of the first fin structure 3 to the second fin structure 4.

[0070] The first fin structure 3 includes a plurality of first fins, and the first fins may be arranged as corrugated fins or plate fins. The first fin structure 3 may include only corrugated fins, only plate fins, or a combination of corrugated fins and plate fins. The second fin structure 4 includes a plurality of second fins, and the second fins may be arranged as corrugated fins or plate fins. The second fin structure 4 may include only corrugated fins, only plate fins, or a combination of corrugated fins and plate fins. By adjusting the fin forms of the first fin structure 3 and the second fin structure 4, the heat exchange effects of the first region and the second region on the first heat exchanger core can be adjusted.

[0071] Provided that the first fin structure 3 or the second fin structure 4 is consisted of a plurality of corrugated fins, the plurality of corrugated fins are arranged in the width direction of the first heat exchanger core. For example, the plurality of first heat exchange tubes 1 and the plurality of corrugated fins are arranged alternately, so that the corrugated fin is arranged between two adjacent first heat exchange tubes 1, and the two first heat exchange tubes 1 are dissipated by one corrugated fin; at the same time, wave crests of the corrugated fins are arranged in the length direction of the first heat exchanger core, and a distance between two adjacent wave crests is the pitch of the above-mentioned first fin structure 3 or the second fin structure 4.

[0072] When the first fin structure 3 includes corrugated fins, two sides of the corrugated fins in the thickness direction of the first heat exchanger core may be defined as a first side and a second side, respectively. Here, the first side of the corrugated fin is located between two adjacent first heat exchange tubes 1, and the second side of the corrugated fin is located between two adjacent second heat exchange tubes 2. In this way, the combination of the corrugated fins with the first heat exchange tubes 1 and the second heat exchange tubes 2 is sufficient, which is conducive to enhance the heat exchange effect.

[0073] Provided that the first fin structure 3 or the second fin structure 4 is consisted of a plurality of plate fins, the plurality of plate fins are arranged in the length direction of the first heat exchanger core, and a distance between two adjacent plate fins is the pitch of the above-mentioned first fin structure 3 or the second fin structure 4. It should be noted that the plate fin does not mean that the fin is completely flat, but that the fin is sheet-shaped as a whole. It can be understood that the fin may be provided with a structure, such as a protrusion, a depression, or a louver.

[0074] The plate fin includes a fin body and a plurality of heat exchange tube slots 8 formed in the fin body and for provision of the heat exchange tubes. The first heat exchange tube 1 or the second heat exchange tube 2 may be provided in the heat exchange tube slots 8. Provided that the first fin structure 3 includes the plate fins, the first heat exchange tube 1 and the second heat exchange tube 2 may be simultaneously provided in the same heat exchange tube slot 8. Provided that the second fin structure 4 includes the plate fins, only the first heat exchange tube 1 is provided in the heat exchange tube slot 8.

[0075] In a preferred solution, the first fin structure 3 and the second fin structure 4 adopt different louver structures and / or pitches, so that the heat exchange effects of the first fin structure 3 and the second fin structure 4 are different, thereby enabling diversified design according to different needs. The louver structure is a special design of the fin, which optimizes the performance of the heat exchanger by forming holes or openings with certain shape and arrangement in a surface of the fin. The louver structure can not only change the air flow characteristics, but also improve the heat exchange efficiency, reduce the flow resistance and improve the overall mechanical strength.

[0076] In some embodiments, in the length direction of the first heat exchanger core, a size of the first fin structure 3 is FL, and a size of the second fin structure 4 is f1, wherein 0.3≤(FL+f1) / TL≤1, and 0.5≤FL / t1≤1. Here, FL is a length of the first fin structure 3. Provided that the first fin structure 3 is consisted of a plurality of corrugated fins, FL is a length of a single corrugated fin. Provided that the first fin structure 3 is consisted of a plurality of plate fins, FL is a size length formed by the plurality of plate fins, not a length of a single plate fin. Here, f1 is a length of the second fin structure 4. Provided that the second fin structure 4 is consisted of a plurality of corrugated fins, f1 is a length of a single corrugated fin. Provided that the second fin structure 4 is consisted of a plurality of plate fins, f1 is a size length formed by the plurality of plate fins, not a length of a single plate fin. In this way, on the premise that the length ratio of the first heat exchanger core to the second heat exchanger core remain unchanged, the heat exchange intensity may be adjusted by adjusting a length ratio of the first fin structure 3 to the first heat exchanger core and a length ratio of the second fin structure 4 to the second heat exchanger core. Moreover, it can be ensured that the overall heat exchanger has good heat exchange performance by limiting the lengths of the first fin structure 3 and the second fin structure 4.

[0077] As shown in FIG. 2, in the thickness direction of the first heat exchanger core, a size of the first fin structure 3 is FW, and a size of the second fin structure 4 is fw, wherein 0.5≤fw / FW≤1. FW is a width of the first fin structure 3, and fw is a width of the second fin structure 4. As shown in FIG. 3, provided that the first fin structure 3 or the second fin structure 4 is consisted of the corrugated fins, FW and fw are the widths of the corrugated fins. As shown in FIG. 5, provided that the first fin structure 3 or the second fin structure 4 is consisted of the plate fins, FW and fw are the widths of the plate fins. In this way, on the premise that the length ratio of the first heat exchanger core to the second heat exchanger core remain unchanged, the heat exchange intensity may be adjusted by adjusting a width ratio of the first fin structure 3 to the second fin structure 4. Moreover, it can be ensured that the overall heat exchanger has good heat exchange performance by limiting the widths of the first fin structure 3 and the second fin structure 4.

[0078] A size of the first heat exchange tube 1 in the thickness direction of the first heat exchanger core is TW, a size of the second heat exchange tube 2 in the thickness direction of the second heat exchanger core is tw, and a center distance between the first heat exchanger core and the second heat exchanger core is D, wherein 0.7<FW / (D+TW / 2+tw / 2)≤2. The first heat exchange tube 1 and the second heat exchange tube 2 are formed by bending a flat tube workpiece, TW is a width of the first heat exchange tube 1, and tw is a width of the second heat exchange tube 2. In this way, on the premise that the length ratio of the first heat exchanger core to the second heat exchanger core remain unchanged, the heat exchange intensity may be adjusted by adjusting the widths of the first fin structure 3 and the second fin structure 4 and the widths of the first heat exchange tube 1 and the second heat exchange tube 2, which is conducive to ensure that the overall heat exchanger has good heat exchange performance.

[0079] In some embodiments, the first heat exchanger core includes a first header 5, and all of the second ends of the plurality of first heat exchange tubes 1 are in communication with the first header 5 to perform flow distribution by the first header 5. An axial direction of the first header 5 is consistent with the width direction of the first heat exchanger core, so that the plurality of first heat exchange tubes 1 are arranged in the axial direction of the first header 5, which is conducive to ensure the flow distribution uniformity of the plurality of first heat exchange tubes 1. The second heat exchanger core includes a second header 6, and all of the second ends of the plurality of second heat exchange tubes 2 are in communication with the second header 6 to perform flow distribution by the second header 6. An axial direction of the second header 6 is consistent with the width direction of the second heat exchanger core, so that the plurality of second heat exchange tubes 2 are arranged in the axial direction of the second header 6, which is conducive to ensure the flow distribution uniformity of the plurality of second heat exchange tubes 2.

[0080] In a preferred solution, the first header 5 is provided with an outlet, so that the first header 5 may serve as an outlet end of the heat exchanger; the second header 6 is provided with an inlet, so that the second header 6 may serve as an inlet end of the heat exchanger. Moreover, the first heat exchanger core is located on windward side of the second heat exchanger core, so that air may pass through the first heat exchanger core and the second heat exchanger core in sequence. In this way, during use, the refrigerant enters from the second header 6, passes through the second heat exchange tubes 2 and the first heat exchange tubes 1 in sequence, and flows out from the first header 5; at the same time, air passes through the first heat exchange tubes 1 and the second heat exchange tubes 2 in sequence, and the flow directions of air and refrigerant are opposite, which is conducive to improve the heat exchange efficiency.

[0081] The windward side of the second heat exchanger core is the side of the second heat exchanger core that first makes in contact with air for heat exchange. As shown in FIG. 6, air flows from left to right, and during installation, it is necessary to ensure that the first heat exchanger core is located upstream of the second heat exchanger core, so that air first passes through the first heat exchanger core and then passes through the second heat exchanger core.

[0082] Of course, in other solution, the first header 5 may be located on an upper part of the first heat exchanger core, and the second header 6 may be located on an upper part of the second heat exchanger core. In addition, the first heat exchanger core is located downstream of the second heat exchanger core, so that air first passes through the second heat exchanger core and then passes through the first heat exchanger core.

[0083] An interior of at least one of the first header 5 and the second header 6 is provided with a fluid distribution device, thereby realizing the reasonable distribution of the refrigerant. The fluid distribution device may be arranged at the inlet end, the outlet end, or both the inlet end and the outlet end.

[0084] As shown in FIGS. 1-2, in the first embodiment, in the length direction of the first heat exchanger core, the first fin structure 3 and the second fin structure 4 are located on opposite sides of the second header 6, respectively. In this way, by increasing the distance between the first fin structure 3 and the second fin structure 4, the first fin structure 3 and the second fin structure 4 may be kept away from the second header 6, thereby being conducive to increase the heat exchange areas of the first fin structure 3 and the second fin structure 4. In the thickness direction of the first heat exchanger core, the second fin structure 4 extends beyond the side of the second header 6 close to the first heat exchanger core, that is, the right end of the second fin structure 4 is located on right side of the left end of the second header 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] As shown in FIGS. 8-9, 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 that of the first heat exchange tube 1, and the first fin structure 3 does not extend beyond the side of the second header 6 close to the first heat exchanger core, that is, the right end of the second fin structure 4 is located on the left side of the left end of the second header 6. In this way, without considering the interference between the second fin structure 4 and the second header 6, the distance between the first fin structure 3 and the second fin structure 4 may be reduced as much as possible, and even the first fin structure 3 and the second fin structure 4 may be in contact with or connected to each other, thereby ensuring that the first fin structure 3 and the second fin structure 4 have a large heat exchange area and high heat exchange performance.

[0086] As shown in FIGS. 10-11, 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 that 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 will not be exposed to the area between two first heat exchange tubes 1. This allows the second fin structure 4 to more intensively perform heat exchange on the area between the two first heat exchange tubes 1, and without considering the interference between the second fin structure 4 and the second header 6, the distance between the first fin structure 3 and the second fin structure 4 may be reduced as much as possible, and even the first fin structure 3 and the second fin structure 4 may be in contact with or connected to each other, which is conducive to the installations of the first fin structure 3 and the second fin structure 4.

[0087] In the above three embodiments, the first fin structure 3 and the second fin structure 4 are configured in the same fin form, for example, both the first fin structure 3 and the second fin structure 4 are consisted of a plurality of corrugated fins, or both are consisted of a plurality of plate fins. The first fin structure 3 and the second fin structure 4 may be arranged at intervals or in a contact manner. The first fin structure 3 and the second fin structure 4 may adopt different louver structures and pitches.

[0088] In some embodiments, the second fin structure 4 includes a plurality of plate fins, which are arranged at intervals in the length direction of the first heat exchanger core, so that the second fin structure 4 may be kept away from the second header 6, thereby facilitating an increase in the heat exchange area of the second fin structure 4. Here, the interval between two adjacent plate fins is the pitch of the second fin structure 4. Moreover, the plate fins extend beyond the side of the second header 6 close to the first heat exchanger core, that is, the right end of the plate fins is located on the right side of the left end of the second header 6. By increasing the heat exchange area of the plate fins, the heat dissipation area loss caused by the interval arrangement of the plurality of plate fins can be compensated. During use, condensed water is generated on the second heat exchanger core, and provision of the plurality of plate fins below the second heat exchanger core allows the condensed water to flow out along the plate fins, preventing the condensed water from being blown into the room.

[0089] The angle formed by the plate fins and the length direction of the first heat exchanger core is a right angle or an acute angle, which may be reasonably set according to different drainage requirements to facilitate the discharge of the condensed water on the second heat exchanger core. For example, in the fourth embodiment shown in FIGS. 12-13, the plate fins are perpendicular to the length direction of the first heat exchanger core; in the fifth embodiment shown in FIGS. 14-15, an acute angle is formed between the plate fins and the length direction of the first heat exchanger core, and the right end of the plate fin is lower than the left end to guide the condensed water to the right side; in the sixth embodiment shown in FIGS. 16-17, an acute angle is formed between the plate fins and the length direction of the first heat exchanger core, and the right end of the plate fins is higher than the left end to guide the condensed water to the left side.

[0090] In the above three embodiments, the first fin structure 3 and the second fin structure 4 are configured in different fin forms, i.e., the first fin structure 3 is consisted of a plurality of corrugated fins. In addition, the first fin structure 3 and the second fin structure 4 may also be configured in the same fin form, i.e., both the first fin structure 3 and the second fin structure 4 are consisted of a plurality of plate fins, in this case the plate fins of the first fin structure 3 may be designed according to the characteristics of the plate fins of the second fin structure 4 mentioned above. The first fin structure 3 and the second fin structure 4 may be arranged at intervals. The first fin structure 3 and the second fin structure 4 may adopt different louver structures and pitches.

[0091] In addition, a drainage groove 7 may also be provided in the plate fin. The drainage groove 7 is located on leeward side of the plate fin, so that the condensed water on the plate fin is blown to the drainage groove 7 by wind and finally discharged from the drainage groove 7. Or else, the drainage groove 7 is located on lower side of the plate fin, and under the action of gravity, the condensed water on the plate fin is guided to the drainage groove 7 and finally discharged from the drainage groove 7. The drainage groove 7 may be configured as a groove recessed downward in the plate fin, or as a flange folded upward on the plate fin.

[0092] As shown in FIGS. 18-19, in the seventh embodiment, the second ends of the plurality of second heat exchange tubes 2 are bent in a direction away from the first heat exchanger core, so that the second header 6 is located on one side of the second heat exchanger core in the thickness direction. In this way, the second header 6 is far away from the first heat exchanger core relative to the second heat exchange tubes 2, which can avoid interference between the second fin structure 4 and the second header 6 and make full use of the windward area of the second heat exchanger core. Moreover, there is no need to consider the interference problem of the second header 6. Provided that 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 may be replaced with each other, and the fin assembly process needs to be carried out only once, which reduces assembly time and improves production efficiency. Both the first fin structure 3 and the second fin structure 4 may be consisted of a plurality of corrugated fins, or both he first fin structure 3 and the second fin structure 4 may be consisted of a plurality of plate fins.

[0093] In addition, combining the above seven embodiments, in an eighth embodiment shown in FIGS. 20-21, the second ends of the plurality of second heat exchange tubes 2 are bent in a direction away from the first heat exchanger core. The second fin structure 4 includes a plurality of plate fins, which are arranged at intervals in the length direction of the first heat exchanger core, and the plate fins extend without exceeding the side of the second header 6 close to the first heat exchanger core, i.e., the right ends of the plate fins are located on the left side of the left end of the second header 6; and an acute angle is formed between the plate fins and the length direction of the first heat exchanger core, and the right ends of the plate fins are lower than the left ends to guide the condensed water to the right side. In addition, in other embodiments, the difference from the above seventh embodiment is that a right angle is formed between the plate fins and the length direction of the first heat exchanger core, or the right ends of the plate fins are higher than the left ends.

[0094] The basic principles of the present disclosure have been described above with reference to the specific embodiments, but it should be noted that the advantages, superiorities, effects and the like mentioned in the present disclosure are merely examples rather than limitations, and these advantages, superiorities, effects and the like may not be considered to be necessary for all the embodiments of the present disclosure. In addition, the specific details disclosed above are only for the purposes of illustration and easy understanding but not limitation, and the above details do not restrict the present disclosure from being implemented by using the above specific details.

[0095] The block diagrams of devices, apparatuses, equipment and systems involved in the present disclosure are only illustrative examples and are not intended to require or imply that they must be connected, arranged and configured in the manners shown in the block diagrams. As will be appreciated by those skilled in the art, these devices, apparatuses, equipment and systems may be connected, arranged and configured in any way. Words such as “include”, “comprise”, “have”, etc. are open-ended words that mean “including but not limited to” and may be used interchangeably therewith. The words “or” and “and” as used herein refer to the word “and / or” and may be used interchangeably therewith unless the context clearly indicates otherwise. The word “such as” as used herein refers to the phrase “such as, but not limited to” and may be used interchangeably therewith.

[0096] It should also be noted that in the apparatus, device and method of the present disclosure, each component or each step may be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present disclosure.

[0097] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present disclosure. Various modifications to these aspects will be readily apparent to those skilled in the art, and the general principles defined herein may be applied to other aspects without departing from the scope of the present disclosure. Therefore, the present disclosure is not intended to be limited to the aspects shown herein, but to be in the broadest 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 the present disclosure are only used to explain the technical solutions more clearly and are not intended to limit the scope of protection of the present disclosure.

[0099] The above description has been given for purposes of illustration and description. Moreover, this description is not intended to limit the embodiments of the present disclosure to the form disclosed herein. While various example 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, comprising:a first heat exchanger core 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 having a plurality of second heat exchange tubes arranged side by side, first ends of the plurality of first heat exchange tubes are in one-to-one communication with first ends of the plurality of second heat exchange tubes, so that the first heat exchanger core is in communication with the second heat exchanger core;wherein a length t1 of the second heat exchanger core is smaller than a 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 a thickness direction; the first fin structure is located in a first region of the first heat exchanger core that overlaps with the second heat exchanger core in the thickness direction and the first fin structure is connected with the second heat exchange tubes; and the second fin structure is located in a second region of the first heat exchanger core that does not overlap with the second heat exchanger core in the thickness direction.

2. The heat exchanger according to claim 1, wherein an angle between the first heat exchanger core and the second heat exchanger core is α, wherein 0°≤α≤45°, and 0.15<t1×cos α / TL≤0.95.

3. The heat exchanger according to claim 1, wherein in a length direction of the first heat exchanger core, a pitch of the first fin structure is FP, and a pitch of the second fin structure is fp, wherein 0.5≤fp / FP≤3.

4. The heat exchanger according to claim 1, wherein in a length direction of the first heat exchanger core, a size of the first fin structure is FL, and a size of the second fin structure is f1, wherein 0.3≤(FL+f1) / TL≤1, and 0.5≤FL / t1<1.

5. The heat exchanger according to claim 1, wherein in the thickness direction of the first heat exchanger core, a size of the first fin structure is FW, and a size of the second fin structure is fw, wherein 0.5≤fw / FW≤1.

6. The heat exchanger according to claim 5, wherein a size of the first heat exchange tube in the thickness direction of the first heat exchanger core is TW, a size of the second heat exchange tube in a thickness direction of the second heat exchanger core is tw, and a center distance between the first heat exchanger core and the second heat exchanger core is D, wherein 0.7≤FW / (D+TW / 2+tw / 2)≤2.

7. The heat exchanger according to claim 1, wherein the first fin structure or the second fin structure comprises at least one of a corrugated fin and a plate fin.

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

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

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

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

12. The heat exchanger according to claim 9, wherein in the thickness direction of the first heat exchanger core, a size of the second fin structure is larger than that of the first heat exchange tube, and the first fin structure extends without exceeding a side of the second header close to the first heat exchanger core.

13. The heat exchanger according to claim 9, wherein the second fin structure comprises a plurality of plate fins arranged in a length direction of the first heat exchanger core; the plate fins extend and exceed a side of the second header close to the first heat exchanger core in the thickness direction of the first heat exchanger core.

14. (canceled)15. The heat exchanger according to claim 9, wherein second ends of the plurality of second heat exchange tubes are bent away from the first heat exchanger core, so that the second header is located on one side of the second heat exchanger core in the thickness direction.

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

17. The heat exchanger according to claim 9, wherein a fluid distribution device is provided in the first header and / or the second header.

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

19. The heat exchanger according to claim 7, wherein provided that the first fin structure and / or the second fin structure comprises corrugated fins, the plurality of first heat exchange tubes and the plurality of corrugated fins are arranged alternately, so that the corrugated fin are provided between two adjacent first heat exchange tubes provided that the first fin structure and / or the second fin structure comprises plate fins, the plate fin comprises a fin body and a plurality of heat exchange tube slots formed in the fin body, the plurality of first heat exchange tubes are arranged in the plurality of heat exchange tube slots, and the plurality of plate fins are arranged in a length direction of the first heat exchange tubes.

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

21. The heat exchanger according to claim 19, wherein the first fin structure comprises plate fins, and at least some of the plurality of heat exchange tube slots of the plate fins are simultaneously provided with both the first heat exchange tubes and the second heat exchange tubes.

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