Heat exchanger

Abstract

Provided in the present application is a heat exchanger, comprising a plurality of heat exchanger cores, wherein one of two adjacent heat exchanger cores is located on one side of the other in the thickness direction; each heat exchanger core comprises a plurality of heat exchange tubes arranged side by side and heat exchange fins arranged on the heat exchange tubes, each heat exchange fin being connected to a drainage member; and in two adjacent heat exchanger cores, the heat exchange tubes of one heat exchanger core and the heat exchange tubes of the other heat exchanger core are staggered in the thickness direction of the heat exchanger cores. In this way, smooth drainage can be maintained, and the loss of the heat exchange capacity can also be compensated for.

Description

heat exchanger Technical Field

[0001] This disclosure relates to the field of heat exchange product technology, specifically to a heat exchanger. Background Technology

[0002] Existing heat exchangers typically have multiple flat tubes with fins between adjacent tubes to improve heat exchange efficiency. When the heat exchanger is used as an evaporator, moisture in the air is condensed on the fins. Summary of the Invention

[0003] One object of this application is to provide a heat exchanger that can both maintain unobstructed drainage and compensate for the loss of heat exchange capacity.

[0004] To achieve the above objectives, this application provides the following technical solution:

[0005] A heat exchanger includes a plurality of heat exchanger cores, wherein one of two adjacent heat exchanger cores is located on one side of the other in the thickness direction.

[0006] The heat exchanger core has a plurality of heat exchange tubes arranged side by side, and heat exchange fins arranged on the heat exchange tubes. At least one heat exchange fin of at least one heat exchanger core is connected to a drain element.

[0007] In at least two adjacent heat exchanger cores, at least one heat exchange tube of one is misaligned with at least one heat exchange tube of the other in the thickness direction of the heat exchanger core.

[0008] Optionally, in the at least two adjacent heat exchanger cores, at least one heat exchange tube of one is aligned with at least one drain element of the other in the thickness direction of the heat exchanger core, and / or at least one drain element of one is aligned with at least one heat exchange tube of the other in the thickness direction of the heat exchanger core.

[0009] Optionally, in at least two adjacent heat exchanger cores, at least one of the following is different: fin height, fin density, window angle, number of windows, and number of heat exchange tubes.

[0010] Optionally, in at least two adjacent heat exchanger cores, the heat transfer coefficient of the heat exchange fins of the heat exchanger core located on the windward side is less than the heat transfer coefficient of the heat exchange fins of the heat exchanger core located on the leeward side.

[0011] Optionally, in at least two adjacent heat exchanger cores, the number of heat exchange tubes in the heat exchanger core located on the windward side is less than the number of heat exchange tubes in the heat exchanger core located on the leeward side.

[0012] Optionally, the heat exchange fins of at least two adjacent heat exchanger cores are connected.

[0013] Optionally, a drainage channel for condensate flow is formed on the drain element; and / or, a drainage channel for condensate flow is formed on one side of the drain element.

[0014] Optionally, the drain element is provided with a drain groove on the side near the heat exchange fins, and the drain groove extends along the length of the heat exchange tube to form the drain channel;

[0015] Alternatively, the drainage component may have a hollow hole extending along the length of the heat exchange tube, and the side of the drainage component near the heat exchange fins may have a water guide hole communicating with the hollow hole to form the drainage channel.

[0016] Optionally, the drainage element is disposed between two adjacent heat exchange fins.

[0017] Optionally, at least one of the drainage elements is provided between two adjacent heat exchange fins; in the thickness direction of the heat exchanger core, the total size of the at least one drainage element is smaller than the size of the at least one adjacent heat exchange fin, so as to form a drainage channel between two adjacent heat exchange fins and on one side of the at least one drainage element.

[0018] Optionally, at least two drainage elements are arranged at intervals between two adjacent heat exchange fins, and the drainage channel is formed between the two adjacent heat exchange fins and between the at least two drainage elements.

[0019] Optionally, the drainage component can be configured as a hollow component or a solid component.

[0020] Optionally, the angle between the extension direction of the heat exchange tube and the vertical direction is 0-15 degrees.

[0021] Optionally, in at least two adjacent heat exchanger cores, the heat exchange tube of one is integrally formed with the heat exchange tube of the other and is formed by bending a flat tube workpiece.

[0022] Optionally, in at least two adjacent heat exchanger cores, the heat exchange tubes of one are connected to the heat exchange tubes of the other through a first bend and a second bend. The first bend causes the two heat exchange tubes to be arranged in the thickness direction of the heat exchanger core, and the second bend causes the two heat exchange tubes to be misaligned in the thickness direction of the heat exchanger core.

[0023] Optionally, the plurality of heat exchanger cores include a first heat exchanger core, a second heat exchanger core, and a third heat exchanger core. The first heat exchanger core is connected to a first manifold as the inlet end, and the third heat exchanger core is connected to a second manifold as the outlet end. The second heat exchanger core and the third heat exchanger core are connected through a third manifold.

[0024] Optionally,

[0025] The third manifold is provided in one form, and the plurality of heat exchange tubes of the second heat exchanger core and the plurality of heat exchange tubes of the third heat exchanger core are alternately connected on the third manifold.

[0026] Alternatively, the third manifold may be provided in two connected parts, one of which is connected to the plurality of heat exchange tubes of the second heat exchanger core, and the other of which is connected to the plurality of heat exchange tubes of the third heat exchanger core.

[0027] Optionally, the heat exchange tube of the first heat exchanger core is connected to the first manifold through a third bend, wherein the third bend is bent away from the second heat exchanger core so that the first manifold is located on one side of the thickness direction of the first heat exchanger core.

[0028] Optionally, a fluid distribution device is provided inside the first manifold.

[0029] Optionally, the first manifold, the second manifold, and the third manifold are arranged in parallel, and the extension direction of the heat exchange tubes of the first heat exchanger core, the second heat exchanger core, and the third heat exchanger core is perpendicular to the axial direction of the first manifold.

[0030] In the heat exchanger provided in this application, during the heat exchange process, the refrigerant flows through the interior of the heat exchange tubes, transferring cooling energy to the tubes. Because the heat exchange fins are in contact with the heat exchange tubes, the cooling energy is conducted along the fins in a direction away from the heat exchange tubes. Under the same conditions, the further away from the heat exchange tubes the heat exchange fins receive, the less cooling energy is received, and the higher the temperature is. Since the heat exchange fins connect the heat exchange tubes and the drain component, the drain component is furthest from the heat exchange tubes, and the heat exchange fins closest to this location have the highest temperature. When air flows through the heat exchange fins, the lower the surface temperature of the fins, the greater the degree of cooling and the greater the heat exchange. However, at the drain component location, because the surface temperature of the heat exchange fins is higher, the heat exchange efficiency is lower when air flows through this location. In this design, when air flows through the front row of heat exchanger cores, the heat exchange is greater near the heat exchange tubes and less near the drain pipes. Because the heat exchange tubes of the front and rear rows of heat exchanger cores are staggered in the direction of air flow, the air flowing through the rear row of heat exchanger cores can compensate for the smaller heat exchange in the front row, thereby improving the heat exchange efficiency of the multi-row heat exchanger cores. Moreover, the air temperature after flowing through the multi-row heat exchanger cores is more uniform, improving the user experience for end customers. Attached Figure Description

[0031] Figure 1 is a perspective view of a heat exchanger shown in some embodiments.

[0032] Figure 2 is a side view of a heat exchanger shown in some embodiments.

[0033] Figure 3 is a cross-sectional view of the heat exchanger shown in the first embodiment.

[0034] Figure 4 is a cross-sectional view of the heat exchanger shown in the second embodiment.

[0035] Figure 5 is a cross-sectional view of the heat exchanger shown in the third embodiment.

[0036] Figure 6 is a cross-sectional view of the heat exchanger shown in the fourth embodiment.

[0037] Figure 7 is a cross-sectional view of the heat exchanger shown in the fifth embodiment.

[0038] Figure 8 is a perspective view of a heat exchanger shown in some other embodiments.

[0039] Figure 9 is a side view of a heat exchanger shown in some other embodiments.

[0040] Figure 10 is a schematic diagram of the structure of a flat tube workpiece shown in some embodiments.

[0041] In the diagram: 1. First heat exchanger core; 2. Second heat exchanger core; 3. Third heat exchanger core; 4. First manifold; 5. Second manifold; 6. Third manifold; 7. First bend; 8. Second bend; 9. Third bend; 11. Heat exchanger tube; 12. Heat exchanger fins; 13. Drainage component; 14. Drainage channel. Detailed Implementation

[0042] 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.

[0043] As shown in Figures 1-10, this application provides a heat exchanger comprising multiple heat exchanger cores connected sequentially, preferably end-to-end. Other embodiments may involve parallel connection of the multiple heat exchanger cores or other connection methods. One heat exchanger core located at one end serves as the inlet heat exchanger core, and the other at the other end serves as the outlet heat exchanger. An internal fluid flows sequentially through the interior of the multiple heat exchanger cores, thereby exchanging heat with an external fluid. For example, the internal fluid may be a refrigerant, and the external fluid may be air. The following explanation uses refrigerant and air as examples.

[0044] The number of heat exchanger cores can be set to two, three, or four. Here, the number of heat exchanger cores is preferably three, which can reduce the unevenness of the outlet air temperature, improve the user experience of end customers, and reduce the risk of excessive local condensate being blown out of the heat exchanger.

[0045] The heat exchanger core has heat exchange tubes 11, heat exchange fins 12, and drain elements 13. Multiple heat exchange tubes 11 are arranged side by side, and multiple drain elements 13 are arranged alternately with the multiple heat exchange tubes 11. The heat exchange fins 12 are connected between adjacent heat exchange tubes 11 and drain elements 13 so that the temperature on the heat exchange tubes 11 can be transferred to the heat exchange fins 12 to accelerate the heat exchange of the heat exchange tubes 11. A drain channel 14 is formed on the drain element 13 and / or on one side of the drain element 13 to drain the condensate on the heat exchange fins 12. When moisture in the air condenses on the heat exchange fins 12, the condensate on the heat exchange fins 12 flows to the drain element 13 through the connection and contact between the heat exchange fins 12 and the drain element 13, and is discharged through the drain channel 14 on the drain element 13 and / or on one side.

[0046] In the specific design, two heat exchange fins 12 are arranged between two adjacent heat exchange tubes 11, and a drain element 13 is arranged between two adjacent heat exchange fins 12. This improves the tightness and reliability of the drain element 13 connection and facilitates simultaneous drainage of multiple heat exchange fins 12. During use, when the heat exchanger core is in the operating state, the angle between the extension direction of the heat exchange tube 11 and the vertical direction is 0-15 degrees, so that the heat exchange tube 11 extends approximately vertically, and consequently the drain element 13 extends approximately vertically, which is beneficial for heat exchange of the heat exchange tubes and drainage of the drain element.

[0047] Here, the heat exchange fin 12 is preferably a corrugated fin, but of course, it can also be set as a fin with other structural forms, which is not specifically limited here.

[0048] In two adjacent heat exchanger cores, one is located on one side of the other along its thickness direction, allowing air to flow along the thickness direction of the heat exchanger core. This results in a large frontal area and high heat exchange efficiency. Specifically, multiple heat exchanger cores are arranged sequentially along their thickness direction. Air first passes through the front row of heat exchanger cores, then through the rear row, with the external airflow direction being consistent.

[0049] It is understandable that the heat exchanger core is configured as a plate-like structure with length, width, and thickness directions. The heat exchange tubes 11 are configured as flat tubes, and multiple heat exchange tubes 11 are arranged along their own thickness direction. The length direction of the heat exchanger core is the same as the length direction of the heat exchange tubes 11, and the width direction of the heat exchanger core is the same as the thickness direction of the heat exchange tubes 11. The X direction in Figure 3-5 represents the thickness direction of the heat exchanger core, which is also the direction of air flow.

[0050] Regarding the specific structure of the heat exchanger core, in at least two adjacent heat exchanger cores (which could be two or three adjacent heat exchanger cores), at least one heat exchange tube 11 of one core is misaligned with at least one heat exchange tube 11 of another core in the thickness direction of the heat exchanger core. This misalignment can be one heat exchange tube 11 with another heat exchange tube 11, or multiple heat exchange tubes 11 can be misaligned with multiple heat exchange tubes 11. Specifically, the multiple heat exchange tubes 11 of the front row of heat exchanger cores and the multiple heat exchange tubes 11 of the rear row of heat exchanger cores are arranged alternately, meaning that one of the heat exchange tubes 11 in the rear row of heat exchanger cores is located between two adjacent heat exchange tubes 11 in the front row of heat exchangers.

[0051] During heat exchange, the refrigerant flows through the interior of the heat exchange tube 11, transferring cooling energy to it. Since the heat exchange fins 12 are connected to the heat exchange tube 11, the cooling energy is conducted along the fins 12 in a direction away from the heat exchange tube 11. Under the same conditions, the further away from the heat exchange tube 11 the heat exchange fins 12 are, the less cooling energy is received and the higher the temperature. Because the heat exchange fins 12 connect the heat exchange tube 11 and the drain 13, and the drain 13 is the furthest from the heat exchange tube 11, the heat exchange fins 12 closest to this location have the highest temperature. When air flows through the heat exchange fins 12, the lower the surface temperature of the fins 12, the greater the degree of cooling and the greater the heat exchange. However, at the drain 13, due to the higher surface temperature of the heat exchange fins 12, the heat exchange efficiency is lower when air flows through this location. In this design, when air flows through the front row of heat exchanger cores, the heat exchange is greater near the heat exchange tubes 11 and less near the drain pipe 13. Since the heat exchange tubes 11 of the front row and the rear row of heat exchanger cores are staggered in the direction of air flow, the air flowing through the rear row of heat exchanger cores can compensate for the smaller heat exchange in the front row of heat exchanger cores, thereby improving the heat exchange efficiency of the multi-row heat exchanger cores. Moreover, the air temperature after flowing through the multi-row heat exchanger cores is more uniform, improving the user experience for end customers.

[0052] As shown in Figure 3, in at least two adjacent heat exchanger cores, at least one heat exchange tube 11 of one is aligned with at least one drain element 13 of the other in the thickness direction of the heat exchanger core. This alignment can be one heat exchange tube 11 aligned with one drain element 13, or multiple heat exchange tubes 11 aligned with multiple drain elements 13. Specifically, the heat exchange tubes 11 of the front row of heat exchanger cores are aligned with the drain elements 13 of the rear row of heat exchanger cores in the thickness direction, and the drain elements 13 of the front row of heat exchanger cores are aligned with the heat exchange tubes 11 of the rear row of heat exchanger cores in the thickness direction. In this way, the position with lower heat exchange capacity in the front row of heat exchangers is aligned with the position with higher heat exchange capacity in the rear row of heat exchanger cores, and vice versa. When air flows through multiple rows of heat exchanger cores, it passes sequentially through multiple positions with different heat exchange capacities, maximizing heat exchange efficiency and the uniformity of the outlet air temperature.

[0053] Of course, when the number of heat exchange tubes 11 or drain elements 13 in adjacent rows of heat exchanger cores is different, it is also possible to simply ensure that the heat exchange tubes 11 of the front row of heat exchanger cores and the drain elements 13 of the rear row of heat exchanger cores are aligned in the thickness direction of the heat exchanger core, or simply ensure that the drain elements 13 of the front row of heat exchanger cores and the heat exchange tubes 11 of the rear row of heat exchanger cores are aligned in the thickness direction of the heat exchanger core. In this way, in combination, multiple heat exchange tubes 11 and multiple drain elements 13 in the same heat exchanger core are arranged alternately in the width direction of the heat exchanger core, and the heat exchange fins 12 are arranged between adjacent heat exchangers 11 and drain elements 13, that is, the outermost part of the heat exchanger core in the width direction of the heat exchanger core can be either a heat exchange tube 11 or a drain element 13.

[0054] In some embodiments, at least one of the following parameters differs among at least two adjacent heat exchanger cores: fin height, fin density, window angle, number of windows, and number of heat exchange tubes 11: fin height, fin density, window angle, and number of windows of the heat exchanger fins 12 are directly proportional to the heat exchange efficiency of the heat exchanger core, and the number of heat exchange tubes 11 is also directly proportional to the heat exchange efficiency of the heat exchanger core. By adjusting the heat exchange efficiency of the front and rear rows of heat exchanger cores, the overall heat exchange efficiency of multiple rows of heat exchanger cores can be improved.

[0055] In this configuration, among at least two adjacent heat exchanger cores, the heat transfer coefficient of the heat exchange fins 12 on the windward side (front row of heat exchanger cores) is lower than that on the leeward side (rear row of heat exchanger cores). A higher heat transfer coefficient of the heat exchange fins 12 results in higher heat exchange efficiency for the heat exchanger core. Thus, by adjusting the heat transfer coefficient of the heat exchange fins 12, the wind resistance of the front row of heat exchanger cores can be reduced, while the heat exchange capacity of the rear row of heat exchanger cores can be increased, thereby improving the overall heat exchange efficiency. Specifically, during manufacturing, the heat transfer coefficient of the heat exchange fins 12 can be adjusted by regulating one or more of the following: fin height, fin density, opening angle, and number of openings.

[0056] As shown in Figure 4, in at least two adjacent heat exchanger cores, the number of heat exchange tubes 11 in the heat exchanger core located on the windward side (front row heat exchanger core) is less than the number of heat exchange tubes 11 in the heat exchanger core located on the leeward side (rear row heat exchanger core). The more heat exchange tubes 11 there are, the higher the heat exchange efficiency of the heat exchanger core. Thus, by adjusting the number of heat exchange tubes 11, the wind resistance of the front row heat exchanger core can be reduced, while the heat exchange capacity of the rear row heat exchanger core can be increased, thereby improving the overall heat exchange efficiency.

[0057] In some embodiments, the heat exchange fins 12 of at least two adjacent heat exchanger cores are connected, for example, the heat exchange fins 12 of two adjacent heat exchanger cores are integrally formed. In this way, multiple adjacent heat exchanger cores share a set of heat exchange fins 12, which can simultaneously improve the heat dissipation performance of two heat exchanger cores. The heat exchange fins 12 of the two heat exchanger cores are aligned, preventing misalignment of the ventilation positions of the two heat exchanger cores, thereby reducing fluid flow resistance, energy consumption, and noise during heat dissipation. Furthermore, it can improve production and assembly efficiency. During production and assembly, it can reduce the problem of misalignment between front and rear rows of heat exchanger cores. Because misalignment of heat exchanger cores during bending can cause air turbulence during airflow, increasing resistance on the windward side and thus increasing the power consumption of the fan.

[0058] The drainage component 13 can be configured in various forms, such as sheet-like, tubular, or plate-like. The specific structure of the drainage component 13 is described below.

[0059] The drain element 13 has two opposing sides, each of which is connected to and in contact with one of the two heat exchange fins 12. A drain groove is provided on the side of the drain element 13, extending along the length of the heat exchange tube 11 to facilitate the discharge of condensate. The heat exchange fins 12 abut against the drain groove, forming a drain channel 14 between the heat exchange fins 12 and the drain groove. In use, the condensate on the heat exchange fins 12 flows into the drain groove and is discharged within it.

[0060] As shown in Figures 1-5, the drainage component 13 is plate-shaped, and the cross-section of the drainage component 13 is wavy to form drainage grooves on both sides of the drainage component 13. In addition, the cross-section of the drainage component 13 can also be set as trapezoidal corrugation, triangular corrugation, arc corrugation or rectangular corrugation.

[0061] As shown in Figures 8-9, the drain element 13 is a hollow tube with a hollow hole inside. The drain element 13 and the hollow hole extend along the length of the heat exchange tube 11 to facilitate the downward discharge of condensate. Two sides of the drain element 13 are connected to two heat exchange fins 12, each with a water guide hole that communicates with the hollow hole. The heat exchange fins 12 abut against the water guide holes, forming a drainage channel 14. During use, the condensate on the heat exchange fins 12 flows to the water guide holes, then into the hollow hole, and is discharged from the bottom of the heat exchanger core under gravity. During the downward flow of the condensate, it does not contact other heat exchange fins 12, resulting in a faster discharge process.

[0062] As shown in Figure 6, in the thickness direction of the heat exchanger core, the size of the drain element 13 is smaller than the size of at least one adjacent heat exchange fin 12. In other words, when the drain element 13 is located between two heat exchange fins 12, the width of the drain element 13 is smaller than the width of the two heat exchange fins 12, or the width of the drain element 13 is smaller than the width of one of the heat exchange fins 12; when the drain element 13 is located on the outermost side and only contacts one heat exchange fin 12, the width of the drain element 13 is smaller than the width of that one heat exchange fin 12. In this way, the space between two adjacent heat exchange fins 12 will not be filled by the drain element 13. A drain channel 14 is formed between the two heat exchange fins 12 and one side of the drain element 13. That is, the drain channel 14 is located in the installation gap between two adjacent heat exchange fins 12 and on one side of the drain element 13 in the thickness direction of the heat exchanger core. The extension direction of the drain channel 14 is parallel to the extension direction of the drain element 13, so that the condensate on the heat exchange fins 12 can be quickly discharged along the drain channel 14.

[0063] The drain element 13 located between the two heat exchange fins 12 can be one or more (i.e., at least two). When multiple drain elements 13 are provided between the two heat exchange fins 12, the multiple drain elements 13 are arranged along the thickness direction of the heat exchanger core and spaced apart, with an installation gap maintained between adjacent drain elements 13. In this way, a drainage channel 14 can be formed between two adjacent heat exchange fins 12 and two adjacent drain elements 13, thereby increasing the positional diversity of the drainage channel 14 between the heat exchange fins 12 and facilitating all-round drainage.

[0064] As shown in Figure 7, the heat exchange fins 12 of two adjacent heat exchanger cores are connected. The width of the heat exchange fins 12 is greater than or equal to the width of the two heat exchange tubes 11. Multiple (at least two) drainage elements 13 are arranged between two adjacent heat exchange fins, spaced apart along the thickness direction of the heat exchanger core. An installation gap is maintained between two adjacent drainage elements 13, thus forming a drainage channel 14 between the two adjacent heat exchange fins 12 and the two adjacent drainage elements 13. Alternatively, a drainage channel 14 can also be formed between two adjacent heat exchange fins 12 and on one side of a drainage element 13. Furthermore, the width of a single drainage element 13 can be smaller than the width of a single heat exchange tube to create a larger drainage channel.

[0065] Specifically, the drain component 13 can be either a hollow component or a solid component. When the drain component 13 is a hollow component, heat transfer between adjacent heat exchange fins 12 can be reduced, as can the thermal impact between two adjacent heat exchange tubes 11, which is beneficial to improving heat exchange efficiency. When the drain component 13 is a solid component, the structure is simple, easy to process, and easy to implement.

[0066] In at least two adjacent heat exchanger cores, the heat exchange tubes 11 of one can be directly connected to the heat exchange tubes 11 of the other, or they can be connected through a third-party adapter. Preferably, the two heat exchange tubes 11 are integrally formed and are processed by bending flat tube workpieces. In this way, the connection between the two adjacent heat exchanger cores is stable and reliable, which can improve the production and processing efficiency of the product.

[0067] As shown in Figure 10, the flat tube workpiece includes a first straight tube section, a second straight tube section, a first bend section 7, and a second bend section 8. Both the first bend section 7 and the second bend section 8 are connected between the first and second straight tube sections. The first and second straight tube sections respectively form heat exchange tubes 11 of two adjacent heat exchanger cores. The bending process of the first bend section 7 allows the first and second straight tube sections to be arranged in the thickness direction of the heat exchanger core. The bending process of the second bend section 8 allows the two heat exchange tubes 11 to be misaligned in the thickness direction of the heat exchanger core. Thus, the structure is simple, integrally formed, easy to assemble, and helps improve structural neatness.

[0068] In some embodiments, the heat exchanger has three heat exchanger cores: a first heat exchanger core 1, a second heat exchanger core 2, and a third heat exchanger core 3. The first heat exchanger core 1 is connected to a first manifold 4, which serves as the inlet end, and the third heat exchanger core 3 is connected to a second manifold 5, which serves as the outlet end. This allows the refrigerant to flow into the first heat exchanger core 1, pass through the first heat exchanger core 1, the second heat exchanger core 2, and the third heat exchanger core 3 in sequence, and then flow out of the third heat exchanger core 3. A plurality of heat exchange tubes 11 in the first heat exchanger core 1 are connected one-to-one with a plurality of heat exchange tubes 11 in the second heat exchanger core 2, thus connecting the first heat exchanger core 1 and the second heat exchanger core 2. Furthermore, a plurality of heat exchange tubes 11 in the second heat exchanger core 2 and a plurality of heat exchange tubes 11 in the third heat exchanger core 3 are connected through a third manifold 6, thus connecting the second heat exchanger core 2 and the third heat exchanger core 3.

[0069] The first manifold 4 is equipped with a fluid distribution device, which can rationally distribute the refrigerant flowing to the first heat exchanger core 1 and improve the uniformity of the refrigerant in each heat exchanger tube 11.

[0070] During operation, refrigerant flows from the first manifold 4 into multiple heat exchange tubes 11 of the first heat exchanger core 1, and then into multiple heat exchange tubes 11 of the second heat exchanger core 2. After heat exchange between the refrigerant inside the first and second heat exchanger cores 1 and the external air, the refrigerant flows into the third manifold 6. Unevaporated liquid and gaseous refrigerant mix thoroughly in the third manifold 6 before flowing into multiple heat exchange tubes 11 of the third heat exchanger core 3, finally converging into the second manifold 5 and flowing out from there. Thus, the design of the third manifold 6 improves the heat exchange uniformity of the internal refrigerant, which is beneficial for improving heat exchange efficiency.

[0071] It should be noted that the third manifold 6 can be configured as one or two parallel and connected manifolds. When there is one third manifold 6, it has two rows of staggered manifold holes. Multiple heat exchange tubes 11 of the second heat exchanger core 2 and multiple heat exchange tubes 11 of the third heat exchanger core 3 are staggered and connected to the two rows of manifold holes respectively. When there are two third manifolds 6, each third manifold 6 has one row of manifold holes. Multiple heat exchange tubes 11 of the second heat exchanger core 2 are connected to one row of manifold holes, and multiple heat exchange tubes 11 of the third heat exchanger core 3 are connected to the other row of manifold holes.

[0072] As shown in Figures 1, 8, and 10, a third bend 9 is provided at one end of the heat exchange tube 11 of the first heat exchanger core 1 near the second heat exchanger core 2. That is, the heat exchange tube 11 of the first heat exchanger core 1 is connected to the first manifold 4 through the third bend 9. The third bend 9 is bent away from the second heat exchanger core 2 so that the first manifold 4 is located on one side of the thickness direction of the first heat exchanger core 1. In this way, the first manifold 4 can be prevented from contacting the third manifold 6, and the heat exchange tube 11 on the first heat exchanger core 1 can also be prevented from contacting the third manifold 6, thereby reducing friction damage caused during later operation.

[0073] The first manifold 4, the second manifold 5, and the third manifold 6 are arranged in parallel. The extension direction of the heat exchange tubes 11 of the first heat exchanger core 1, the second heat exchanger core 2, and the third heat exchanger core 3 is perpendicular to the axial direction of the first manifold 4. During installation, the extension direction of the heat exchange tubes 11 and the drain component 13 can be vertical, while the extension direction of the first manifold 4, the second manifold 5, and the third manifold 6 can be horizontal. This arrangement allows condensate to drain smoothly along the drain channel 14 formed on the drain component 13 under the action of gravity.

[0074] 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.

[0075] 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.

[0076] 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.

[0077] 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.

[0078] 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.

[0079] 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 in that, It includes multiple heat exchanger cores, with one of two adjacent heat exchanger cores located on one side of the other in the thickness direction; The heat exchanger core has a plurality of heat exchange tubes arranged side by side, and heat exchange fins arranged on the heat exchange tubes. At least one heat exchange fin of at least one heat exchanger core is connected to a drain element. In at least two adjacent heat exchanger cores, at least one heat exchange tube of one is misaligned with at least one heat exchange tube of the other in the thickness direction of the heat exchanger core.

2. The heat exchanger according to claim 1, characterized in that, In the at least two adjacent heat exchanger cores, at least one heat exchange tube of one is aligned with at least one drain element of the other in the thickness direction of the heat exchanger core, and / or at least one drain element of one is aligned with at least one heat exchange tube of the other in the thickness direction of the heat exchanger core.

3. The heat exchanger according to claim 1, characterized in that, In at least two adjacent heat exchanger cores, at least one of the following is different: fin height, fin density, window angle, number of windows, and number of heat exchange tubes.

4. The heat exchanger according to claim 3, characterized in that, In at least two adjacent heat exchanger cores, the heat transfer coefficient of the heat exchange fins of the heat exchanger core located on the windward side is less than that of the heat exchange fins of the heat exchanger core located on the leeward side.

5. The heat exchanger according to claim 3, characterized in that, In at least two adjacent heat exchanger cores, the number of heat exchange tubes in the heat exchanger core located on the windward side is less than the number of heat exchange tubes in the heat exchanger core located on the leeward side.

6. The heat exchanger according to claim 1, characterized in that, The heat exchange fins of at least two adjacent heat exchanger cores are connected.

7. The heat exchanger according to claim 1, characterized in that, A drainage channel for the flow of condensate is formed on the drainage element; and / or, a drainage channel for the flow of condensate is formed on one side of the drainage element.

8. The heat exchanger according to claim 1, characterized in that, The drain component has a drain groove on its side near the heat exchange fins, and the drain groove extends along the length of the heat exchange tube to form a drain channel. Alternatively, the drainage component may have a hollow hole extending along the length of the heat exchange tube, and the side of the drainage component near the heat exchange fins may have a water guide hole communicating with the hollow hole to form a drainage channel.

9. The heat exchanger according to claim 1 or 6, characterized in that, The drainage element is disposed between two adjacent heat exchange fins.

10. The heat exchanger according to claim 9, characterized in that, At least one drainage element is provided between two adjacent heat exchange fins; in the thickness direction of the heat exchanger core, the total size of the at least one drainage element is smaller than the size of the at least one adjacent heat exchange fin, so as to form a drainage channel between the two adjacent heat exchange fins and on one side of the at least one drainage element.

11. The heat exchanger according to claim 10, characterized in that, At least two drainage elements are arranged at intervals between two adjacent heat exchange fins, and the drainage channel is formed between the two adjacent heat exchange fins and between the at least two drainage elements.

12. The heat exchanger according to claim 10, characterized in that, The drainage component can be either a hollow or solid component.

13. The heat exchanger according to claim 1, characterized in that, The angle between the extension direction of the heat exchange tube and the vertical direction is 0-15 degrees.

14. The heat exchanger according to claim 1, characterized in that, In at least two adjacent heat exchanger cores, the heat exchange tube of one is integrally formed with the heat exchange tube of the other and is formed by bending a flat tube workpiece.

15. The heat exchanger according to claim 14, characterized in that, In at least two adjacent heat exchanger cores, the heat exchange tubes of one are connected to the heat exchange tubes of the other through a first bend and a second bend. The first bend causes the two heat exchange tubes to be arranged in the thickness direction of the heat exchanger core, and the second bend causes the two heat exchange tubes to be misaligned in the thickness direction of the heat exchanger core.

16. The heat exchanger according to claim 1, characterized in that, The plurality of heat exchanger cores include a first heat exchanger core, a second heat exchanger core, and a third heat exchanger core. The first heat exchanger core is connected to a first manifold, which serves as the inlet end. The third heat exchanger core is connected to a second manifold, which serves as the outlet end. The second heat exchanger core and the third heat exchanger core are connected through the third manifold.

17. The heat exchanger according to claim 16, characterized in that, The third manifold is provided in one form, and the plurality of heat exchange tubes of the second heat exchanger core and the plurality of heat exchange tubes of the third heat exchanger core are alternately connected on the third manifold. Alternatively, the third manifold may be provided in two connected parts, one of which is connected to the plurality of heat exchange tubes of the second heat exchanger core, and the other of which is connected to the plurality of heat exchange tubes of the third heat exchanger core.

18. The heat exchanger according to claim 16, characterized in that, The heat exchange tube of the first heat exchanger core is connected to the first manifold through a third bend. The third bend is bent away from the second heat exchanger core so that the first manifold is located on one side of the thickness direction of the first heat exchanger core.

19. The heat exchanger according to claim 16, characterized in that, A fluid distribution device is installed inside the first manifold.

20. The heat exchanger according to claim 16, characterized in that, The first manifold, the second manifold, and the third manifold are arranged in parallel, and the extension direction of the heat exchange tubes of the first heat exchanger core, the second heat exchanger core, and the third heat exchanger core is perpendicular to the axial direction of the first manifold.

Images