Heat exchanger

Abstract

Provided is a heat exchanger (1). The heat exchanger (1) comprises a first member (11), a second member (12), and fins (13), wherein there are two or more fins (13), and the two or more fins (13) are spaced apart in a first direction perpendicular to the length direction of the first member (11). The heat exchanger (1) further comprises heat exchange tubes; at least part of the fins (13) are located between two adjacent heat exchange tubes in the length direction of the first member (11); there are two or more heat exchange tubes, and the two or more heat exchange tubes are arranged in the length direction of the first member (11); the heat exchange tubes comprise a first heat exchange tube (14); the first heat exchange tube (14) comprises a first sub-heat exchange tube (141) and a second sub-heat exchange tube (142); the first sub-heat exchange tube (141) comprises a first end portion (1411) and a second end portion (1412), and the second sub-heat exchange tube (142) comprises a third end portion (1421) and a fourth end portion (1422); and the first end portion (1411) is connected to the first member (11), the second end portion (1412) is connected to the third end portion (1421), and the fourth end portion (1422) is connected to the second member (12).

Description

heat exchanger

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority and benefits of the Chinese patent application with application number 202311631553.2 and application date November 30, 2023. The entire contents of the above-mentioned Chinese patent application are hereby incorporated by reference into this application. Technical Field

[0003] The present application relates to the field of heat exchange technology, and in particular to a tube-fin heat exchanger. Background Art

[0004] In the related art, a heat exchanger mainly includes a plurality of heat exchange tubes and a plurality of fins arranged in parallel. Refrigerant circulates inside the heat exchange tubes. One heat exchange tube passes through a plurality of fins. The fins exchange heat with the air. The plurality of fins are spaced apart in the length direction of the heat exchange tube. In some applications, due to the need to provide a heat exchanger with a larger heat exchange capacity, some large-sized heat exchangers are usually designed. However, due to the long length and small diameter of the large-sized heat exchange tubes, the heat exchange tubes are easily bent and deformed during the assembly process, thereby increasing the installation speed of the heat exchange tubes and fins, affecting the reliability of the heat exchanger. Summary of the Invention

[0005] To this end, an embodiment of the present application proposes a heat exchanger, which is beneficial for reducing the bending deformation of the heat exchange tube and improving the assembly efficiency of the heat exchanger.

[0006] An embodiment of the present application provides a heat exchanger comprising a first member, a second member, and fins, wherein there are two or more fins, and the two or more fins are spaced apart in a first direction perpendicular to the length direction of the first member;

[0007] It also includes a heat exchange tube, there are more than two heat exchange tubes, the more than two heat exchange tubes are arranged in the length direction of the first component, at least part of the fins are located between two adjacent heat exchange tubes in the length direction of the first component, the heat exchange tube includes a first heat exchange tube, the first heat exchange tube includes a first sub-heat exchange tube and a second sub-heat exchange tube, the first sub-heat exchange tube includes a first end and a second end, the second sub-heat exchange tube includes a third end and a fourth end, the first end is connected to the first component, the second end is connected to the third end, and the fourth end is connected to the second component.

[0008] The heat exchange tube of the heat exchanger of the embodiment of the present application includes a first sub-heat exchange tube and a second sub-heat exchange tube. The first sub-heat exchange tube includes a first end and a second end, and the first end is connected to the first piece. The second sub-heat exchange tube includes a third end and a fourth end, and the fourth end is connected to the second piece, and the second end is connected to the third end, thereby connecting the first sub-heat exchange tube and the second sub-heat exchange tube, which is beneficial to reducing the bending deformation of the heat exchange tube, improving the reliability of the heat exchange tube, and improving the assembly efficiency of the heat exchange tube and the fin.

[0009] In some embodiments, the heat exchanger includes at least one of the following technical features a to c:

[0010] a) The second end of the first sub-heat exchange tube includes a flared portion having an inner cavity, and the third end of the second sub-heat exchange tube includes a constricted portion, a flat portion, or a flared portion, with at least a portion of the constricted portion, the flat portion, or the flared portion of the third end located within the inner cavity of the flared portion of the second end;

[0011] b) the second end of the first sub-heat exchange tube includes a necked portion having an inner cavity, and the third end of the second sub-heat exchange tube includes a necked portion, a flat portion, or a flared portion, and at least a portion of the necked portion or flat portion of the third end is located in the inner cavity of the necked portion of the second end;

[0012] c) The second end of the first sub-heat exchange tube includes a flat end portion having an inner cavity, and at least part of the necked end portion, flat end portion, or expanded end portion of the third end portion is located in the inner cavity of the necked end portion of the second end portion.

[0013] In some embodiments, the second end portion of the first sub-heat exchange tube has a first threaded portion, the third end portion of the second sub-heat exchange tube has a second threaded portion, one of the first threaded portion and the second threaded portion has an internal thread, and the other of the two threaded portions has an external thread.

[0014] In some embodiments, the heat exchanger includes a third piece, the third piece includes a third tube body, the third tube body has a third tube cavity, the second sub-heat exchange tube is connected to the third piece, the first sub-heat exchange tube includes a first channel, the second sub-heat exchange tube includes a second channel, the first channel is connected to the third tube cavity, and the second channel is connected to the third tube cavity.

[0015] In some embodiments, the third piece further includes two or more partitions, the third lumen includes two or more first sub-cavities, the partition is provided between two adjacent first sub-cavities in the length direction of the third piece, one first sub-cavity is connected to the first channel, and the other first sub-cavity is connected to the second channel.

[0016] In some embodiments, the third tube body includes a fifth end and a sixth end, the fifth end is connected to the second end, the sixth end is connected to the third end, a portion of the first sub-heat exchange tube is located in the third tube cavity, and a portion of the second sub-heat exchange tube is located in the third tube cavity.

[0017] In some embodiments, the fifth end includes a third threaded portion, the sixth end includes a fourth threaded portion, the second end includes a first threaded portion, the third end includes a second threaded portion, the second end is threadedly connected to the fifth end, and the third end is threadedly connected to the sixth end.

[0018] In some embodiments, the first heat exchange tube includes a bent section and a straight section, the straight section is more than two straight sections, the more than two straight sections include a first straight section and a second straight section, one end of the bent section is connected to one end of the first straight section, and the other end of the bent section is connected to one end of the second straight section.

[0019] In some embodiments, the fin includes a first fin and a second fin, the first fin is fixedly connected to the bent section, and at least one of the first fins has a fin width dimension of W1, the second fin is fixedly connected to the straight section, and at least one of the second fins has a fin width dimension of W2, W1<W2.

[0020] In some embodiments, the bending section passes through the first fin in the thickness direction of the first fin, and a portion of the first fin is located between two adjacent bending sections in the length direction of the first member.

[0021] In some embodiments, the fins include third fins and fourth fins, there are more than two third fins, the third fins have a first through hole, and one first sub-heat exchange tube passes through the first through hole of more than two third fins, there are more than two third fins, the fourth fins have a second through hole, and one second sub-heat exchange tube passes through the second through hole of more than two fourth fins. In the length direction of the heat exchange tube, the distance between at least two adjacent third fins is L1, and the distance between at least two adjacent fourth fins is L2, and L1>L2.

[0022] In some embodiments, the heat exchanger further includes a fourth piece, the fourth piece includes a fourth tube body, the fourth tube body has a fourth tube cavity, the second piece is connected to the fourth piece, the internal volume of the fourth tube body is S1, the second piece has a second tube body, the second tube body has a second tube cavity, the internal volume of the second piece (12) is S2, 0.3<S1 / S2<0.85.

[0023] In some embodiments, the heat exchanger also includes a sixth piece, the sixth piece includes a sixth tube body, the sixth tube body has a sixth tube cavity, and the two or more heat exchange tubes also include a second heat exchange tube, one end of the second heat exchange tube is connected to the sixth piece, and the other end of the second heat exchange tube is connected to the first piece, and the length of the second heat exchange tube is smaller than the length of the first heat exchange tube. Description of the drawings:

[0024] FIG1 is a schematic structural diagram of a heat exchanger according to an embodiment of the present application;

[0025] FIG2 is a schematic structural diagram of the heat exchanger embodiment shown in FIG1 before assembly;

[0026] FIG3 is another schematic structural diagram of the heat exchanger embodiment shown in FIG1 before assembly;

[0027] FIG4 is another structural schematic diagram of the heat exchanger embodiment shown in FIG1 before assembly;

[0028] FIG5 is another structural schematic diagram of the heat exchanger embodiment shown in FIG1 before assembly;

[0029] FIG6 is another structural schematic diagram of the heat exchanger embodiment shown in FIG1 before assembly;

[0030] FIG7 is a schematic diagram of yet another structure of the heat exchanger embodiment shown in FIG1 before assembly;

[0031] FIG8 is a schematic diagram of yet another structure of the heat exchanger embodiment shown in FIG1 before assembly;

[0032] FIG9 is a schematic diagram of yet another structure of the heat exchanger embodiment shown in FIG1 before assembly;

[0033] FIG10 is a schematic diagram of yet another structure of the heat exchanger embodiment shown in FIG1 before assembly;

[0034] FIG11 is a schematic structural diagram of a heat exchanger according to another embodiment of the present application;

[0035] FIG12 is a schematic structural diagram of another heat exchanger embodiment shown in FIG11 before assembly;

[0036] FIG13 is a schematic structural diagram of a heat exchanger according to yet another embodiment of the present application;

[0037] FIG14 is a schematic structural diagram of a heat exchanger according to yet another embodiment of the present application;

[0038] FIG15 is a schematic structural diagram of a heat exchanger according to yet another embodiment of the present application;

[0039] FIG16 is a schematic structural diagram of a heat exchanger according to yet another embodiment of the present application;

[0040] FIG17 is a schematic structural diagram of a heat exchanger according to yet another embodiment of the present application;

[0041] FIG18 is a schematic structural diagram of a heat exchanger according to yet another embodiment of the present application;

[0042] FIG19 is a schematic structural diagram of a heat exchanger according to yet another embodiment of the present application;

[0043] FIG20 is a schematic structural diagram of a heat exchanger according to yet another embodiment of the present application;

[0044] FIG21 is a schematic structural diagram of a heat exchanger according to yet another embodiment of the present application;

[0045] FIG22 is a schematic diagram of an enlarged structural view of location A of the heat exchanger shown in FIG21;

[0046] FIG23 is a schematic diagram of an enlarged structural view of location B of the heat exchanger shown in FIG21;

[0047] FIG24 is a schematic structural diagram of a heat exchanger according to yet another embodiment of the present application;

[0048] FIG25 is a schematic structural diagram of a heat exchanger according to yet another embodiment of the present application.

[0049] Figures and Symbols: Heat exchanger 1, first piece 11, second piece 12, fin 13, first fin 131, second fin 132, third fin 133, fourth fin 134, first heat exchange tube 14, first sub-heat exchange tube 141, first end 1411, second end 1412, flared portion 14121 of the second end, necked portion 14122 of the second end, flat portion 14123 of the second end, first threaded portion 14124, second sub-heat exchange tube 142, third end 14211, fourth end 1422, necked portion 14211 of the third end, flat portion 14212, flared portion 14213 of the third end, second threaded portion 14214, second heat exchange tube 18, first straight section 143, second straight section 145, third straight section 147, first bent section 144, second bent section 146 The third piece 15 , the fifth end 151 , the sixth end 152 , the third threaded portion 1511 , the fourth threaded portion 1521 , the fourth piece 16 , the sixth piece 17 , the second heat exchange tube 18 , the fifth piece 19 , and the partition 20 . DETAILED DESCRIPTION

[0050] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present application, and should not be understood as limiting the present application. In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, rather than indicating or implying that the device or element fixture referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present application.

[0051] As shown in Figures 1 to 22, the heat exchanger 1 according to the embodiment of the present application includes a first piece 11, a second piece 12, a heat exchange tube and a fin 13. In some applications, the first piece 11 and the second piece 12 can be a cylindrical structure made of metal. The first piece 11 and the second piece 12 both have a tube cavity for the circulation of refrigerant. The fin 13 is a sheet-like structure made of metal and has a relatively thin thickness. The fin 13 has a plurality of through holes for the heat exchange tube to pass through. It can be understood that the fin 13 can also be a fin including a groove, which matches the shape of the heat exchange tube for the heat exchange tube to be inserted. The cross-section of the heat exchange tube can be circular, elliptical, or a flat polygonal structure. The heat exchange tube includes a first heat exchange tube 14. There are multiple first heat exchange tubes 14. It should be noted here that the heat exchanger 1 includes multiple first heat exchange tubes 14 and multiple first heat exchange tubes. The shapes of the tubes 14 may be the same or different. The first heat exchange tube 14 includes a first sub-heat exchange tube 141 and a second sub-heat exchange tube 142. The first sub-heat exchange tube 141 includes a plurality of first channels, which are arranged in the width direction of the first sub-heat exchange tube 141. The second sub-heat exchange tube 142 includes a plurality of second channels, which are arranged in the width direction of the second sub-heat exchange tube 142. The first channels and the second channels are for refrigerant to flow. The first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 are connected. The first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 are connected and communicated. The fin 13 has a plurality of through holes. The first sub-heat exchange tube 141 passes through the plurality of fins 13. The second sub-heat exchange tube 142 passes through the plurality of fins 13. The first sub-heat exchange tube 141 is connected and communicated with the first piece 11, and the second sub-heat exchange tube 142 is connected and communicated with the second piece 12.

[0052] In some embodiments, the heat exchange tube is long and has a small diameter, and the heat exchange tube is made of relatively soft aluminum metal. Therefore, during the assembly of the heat exchanger, the heat exchange tube will bend due to the influence of gravity, resulting in low assembly efficiency when installed with the fins. Therefore, by assembling and splicing the heat exchange tube with a long length and a small diameter into two relatively short lengths, it is helpful to reduce the bending of the heat exchange tube and improve the assembly efficiency.

[0053] In some embodiments, as shown in Figures 1, 10, 12 to 16, the heat exchange tube of the heat exchanger 1 shown in this embodiment is a schematic structure after the first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 are connected and assembled. The first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 can be connected by threaded fitting or by fitting and switching through a third pipe.

[0054] In some embodiments, the structure of the heat exchanger 1 before assembly is shown in Figures 2 to 10. Specifically, as shown in Figure 2, the first sub-heat exchange tube 141 includes a first end 1411 and a second end 1412. The first end 1411 is connected to the first piece 11, and the second end 1412 includes a flared portion. The flared portion refers to a pipe section whose pipe diameter value is larger than the pipe diameter value of other parts of the first sub-heat exchange tube 141. It can also refer to a pipe section whose cross-section circumference of the cross-section of the pipe section is greater than the cross-section circumference of other parts of the first sub-heat exchange tube 141. The flared portion has an inner cavity. The second sub-heat exchange tube 142 includes a third end 1421 and a fourth end 1422. The third end 1421 includes a flat end portion. The flat end portion refers to a tube segment having the same diameter as the other tube segments of the second sub-heat exchange tube 142, or may also refer to a tube segment having the same cross-sectional perimeter as the other tube segments of the second sub-heat exchange tube 142. The fourth end 1422 is connected to the second member 12. At least a portion of the flat end portion is located in the inner cavity of the flared portion, and the flared portion and the flat end portion are matingly connected. It should be noted that in some embodiments, as shown in FIG8 , the second end 1412 may include a flat end portion and the third end 1421 may include a flared portion. This can also achieve the effect of connecting the first sub-heat exchange tube 141 to the second sub-heat exchange tube 142, thereby connecting the two sub-heat exchange tubes, thereby increasing the effective heat exchange area of ​​the heat exchanger 1 and further improving the heat exchange performance of the heat exchanger 1.

[0055] In a through-tube heat exchanger 1 according to an embodiment of the present application, the heat exchange tubes of the through-tube heat exchanger 1 need to pass through the through holes of multiple fins 13. However, the metal fins 13 according to the embodiment of the present application include aluminum foil fins 13 made of aluminum. The fins 13 are relatively thin, and the diameter of the heat exchange tubes is only slightly smaller than the diameter of the through holes of the fins 13. Therefore, when the heat exchange tubes need to pass through as many as dozens of fins 13, due to the relatively soft material of the fins 13 and the long length of the heat exchange tubes, the insertion of the fins 13 is prone to deviation, resulting in deformation of the fins 13. Therefore, the length of the heat exchange tube can be shortened. By combining the relatively short first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 with multiple fins 13, the number of fins 13 that deviate can be reduced. In some applications, the deformation of the fins 13 leads to a reduction in the spacing between adjacent fins 13, and even causes two fins 13 to overlap, thereby blocking the circulation of air flow. The heat exchanger 1 of this embodiment effectively improves and reduces the deformation of the fins 13, which is beneficial to improving the heat exchange efficiency of the heat exchanger 1 during operation.

[0056] In some embodiments, specifically, as shown in Figure 3, the first sub-heat exchange tube 141 includes a first end 1411 and a second end 1412, the first end 1411 is connected to the first piece 11, the second end 1412 includes a flared portion, the flared portion has an inner cavity, the second sub-heat exchange tube 142 includes a third end 1421 and a fourth end 1422, the third end 1421 includes a necked portion, the necked portion refers to a portion of the tube whose diameter is smaller than that of other portions of the second sub-heat exchange tube 142, or may refer to a portion of the tube whose cross-sectional circumference is smaller than that of other portions of the second sub-heat exchange tube 142, the necked portion has an inner cavity, the fourth end 1422 is connected to the second piece 12, at least part of the necked portion of the first end 1411 is located in the inner cavity of the flared portion of the second end 1412, and the flared portion and the necked portion are connected in a cooperative manner. It should be noted that, in some embodiments, as shown in Figure 9, the first sub-heat exchange tube 141 includes a first end 1411 and a second end 1412, the first end 1411 is connected and communicated with the first piece 11, the second end 1412 of the first sub-heat exchange tube 141 includes a necking portion, the second sub-heat exchange tube 142 includes a third end 1421 and a fourth end 1422, the third end 1421 includes a flaring portion, at least part of the necking portion of the second end 1412 is located in the inner cavity of the flaring portion of the third end 1421, the first end 1411 is connected and communicated with the first piece 11, the fourth end 1422 is connected and communicated with the second piece 12, the first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 are connected and communicated through the matching of the necking and flaring of the tube mouths, and the heat exchanger 1 of this embodiment is conducive to saving materials and reducing material costs.

[0057] In some embodiments, specifically, as shown in Figure 4, the first sub-heat exchange tube 141 includes a first end 1411 and a second end 1412, the first end 1411 is connected to the first piece 11, the second end 1412 includes a flared portion, and the flared portion has an inner cavity. The second sub-heat exchange tube 142 includes a third end 1421 and a fourth end 1422, the third end 1421 includes a flared portion, and the flared portion has an inner cavity. By flaring the second end 1412 and the third end 1421, the flow area of ​​the heat exchange tube channel can be increased, thereby reducing the friction of the fluid, reducing the resistance of the system, and increasing the outflow rate. In some application conditions, it is beneficial to improve the heat exchange performance of the heat exchanger 1.

[0058] In some embodiments, specifically, as shown in Figure 5, the first sub-heat exchange tube 141 includes a first end 1411 and a second end 1412, the second end 1412 includes a necking portion, the necking portion has an inner cavity, the first end 1411 is connected and communicated with the first piece 11, the second sub-heat exchange tube 142 includes a third end 1421 and a fourth end 1422, the fourth end 1422 is connected and communicated with the second, the third end 1421 includes a necking portion, the necking portion has an inner cavity, the second end 1412 and the third end 1421 are connected and communicated, at least part of the necking portion of the second end 1412 is located in the inner cavity of the necking portion of the third end 1421, in some working conditions of the heat exchanger 1, refrigerant flows inside the heat exchanger 1, and the heat exchange tubes of the heat exchanger 1 of this embodiment are connected to the necking portion through the necking portion, therefore, it is beneficial to increase the flow rate of the refrigerant inside the heat exchange tubes, thereby facilitating the improvement of the heat exchange capacity of the heat exchanger 1.

[0059] In some embodiments, specifically, as shown in Figure 6, the first sub-heat exchange tube 141 includes a first end 1411 and a second end 1412, the second end 1412 includes a flat-end portion, the flat-end portion has an inner cavity, the first end 1411 is connected to and communicated with the first piece 11, the second sub-heat exchange tube 142 has a third end 1421 and a fourth end 1422, the third end 1421 has a necked portion, the necked portion has an inner cavity, and the fourth end 1422 is connected to and communicated with the second piece 12. In some embodiments, the first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 are circular tubes. The cross-sectional area values ​​of the first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 are different. The diameter of the first sub-heat exchange tube 141 is smaller than the diameter of the second sub-heat exchange tube 142. Therefore, the tube mouth of the second sub-heat exchange tube 142 is connected and communicated with the first sub-heat exchange tube 141 in the form of a necking. It should be noted that in some embodiments, as shown in FIG. 7, the first end portion 1411 of the first sub-heat exchange tube 141 can be provided with a necking portion, and the second sub-heat exchange tube 142 can be provided with a necking portion. The third end 1421 of 142 can be provided with a flat end. In some embodiments, since the heat exchanger 1 has a strong heat exchange capacity on the windward side, each first sub-heat exchange tube 141 has the same structure. Therefore, by reducing the tube diameter, that is, reducing the cross-sectional area of ​​the flow channel of the first sub-heat exchange tube 141, the total cross-sectional area of ​​the flow channel of the first sub-heat exchange tube 141 is reduced, thereby reducing the heat exchange performance of the windward side of the heat exchanger 1. When the heat exchanger 1 is used as an evaporator, the heat exchange capacity on the windward side can be reduced, thereby reducing frost, and thus the frost cycle can be delayed.

[0060] In some embodiments, the first sub-heat exchange tube 141 can be set as a single channel, or it can be set as multiple channels spaced apart in the width direction of the heat exchange tube. The cross-sectional area of ​​the flow channel of the first sub-heat exchange tube 141 is smaller than the cross-sectional area of ​​the flow channel of the second sub-heat exchange tube 142.

[0061] In some embodiments, as shown in Figures 10 and 11, the first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 are connected by a spiral. Specifically, the first sub-heat exchange tube 141 includes a first end 1411 and a second end 1412. The first end 1411 is connected to and communicates with the first piece 11, and the second end 1412 includes a first threaded portion 14124. The first threaded portion 14124 has an external thread and the first threaded portion 14124 also has an inner cavity. The second sub-heat exchange tube 142 includes a third end 1421 and a fourth end 1422. The third end 1421 includes a second threaded portion 14214. The second threaded portion 14214 has an internal thread. The grooves and external threads are connected and assembled. Specifically, in the heat exchanger 1 in this embodiment, each first sub-heat exchange tube 141 passes through a plurality of fins 13, and the first end 1411 of the first sub-heat exchange tube 141 is connected and communicated with the first piece 11. The second end 1412 with an external thread in each first sub-heat exchange tube 141 is connected with the third end 1421 with an internal thread in each second sub-heat exchange tube 142, so that the second end 1412 is connected and communicated with the third end 1421. Then, each second sub-heat exchange tube 142 passes through a plurality of fins 13, and the fourth end 1422 of the second sub-heat exchange tube 142 is connected and communicated with the second piece 12. Here, it should be noted that the second end 1412 of the first sub-heat exchange tube 141 can be provided with an external threaded portion (not shown), and the third end 1421 of the second sub-heat exchange tube 142 can be provided with an internal threaded portion (not shown), and the first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 can also be threadedly connected and connected. The heat exchange tubes connected by threaded connection can strengthen the connection strength of the connection between the first sub-heat exchange tube 141 and the second sub-heat exchange tube 142, thereby improving the reliability of the heat exchanger 1.

[0062] In some embodiments, the first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 are connected by a connecting piece. Here, it should be noted that the connecting piece can be a connecting pipe segment or a connecting block. The connecting piece has a through inner cavity or channel. Specifically, as shown in Figures 12 and 14, the connecting piece is a connecting pipe segment. The connecting piece has a fifth end 151 and a sixth end 152. The fifth end 151 is connected and communicated with the second end 1412, and the sixth end 152 is connected and communicated with the third end 1421.

[0063] Specifically, in some embodiments, as shown in FIG13 , the fifth end portion 151 includes a third threaded portion 1511, the third threaded portion 1511 has an inner cavity, and the third threaded portion 1511 also has an internal thread, the sixth end portion 152 includes a fourth threaded portion 1521, the fourth threaded portion 1521 has an inner cavity, and the fourth threaded portion 1521 also has an internal thread, the heat exchanger 1 of this embodiment includes a first sub-heat exchange tube 141 and a second sub-heat exchange tube 142, the first sub-heat exchange tube 141 includes a first end portion 1411 and a second end portion 1412, and the second sub-heat exchange tube 1 42 includes a third end portion 1421 and a fourth end portion 1422, the first end portion 1411 is connected and communicated with the first piece 11, the second end portion 1412 includes a first threaded portion 14124, the first threaded portion 14124 has an inner cavity, the first threaded portion 14124 also has an external thread, the external thread of the first threaded portion 14124 is matched with the internal thread of the third threaded portion 1511, that is, the second end portion 1412 is connected to the fifth end portion 151 through threaded matching, the third end portion 1421 of the second sub-heat exchange tube 142 includes the second threaded portion 142 14, the second threaded portion 14214 has an inner cavity, and the second threaded portion 14214 also includes an external thread. The external thread of the second threaded portion 14214 is matched with the internal thread of the fourth threaded portion 1521. That is, the third end 1421 and the sixth end 152 are connected and communicated by threads, and the first sub-heat exchange tube 141, the connector and the second sub-heat exchange tube 142 are connected. More specifically, the external thread direction of the first threaded portion 14124 and the external thread direction of the second threaded portion 14214 are one positive and one negative. It can be understood that when the first threaded portion 1 The external thread of 4124 is a left-hand thread, and the external thread of the second threaded portion 14214 is a right-hand thread. The internal threads at both ends of the connecting piece only need to be compatible with the threads of the first threaded portion 14124 and the second threaded portion 14214. The first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 are connected by the connecting piece, which facilitates the overall assembly of the first sub-heat exchange tube 141 with multiple fins 13 and the second sub-heat exchange tube 142 with multiple fins 13, thereby improving the strength of the heat exchange tube connection and improving the reliability of the heat exchanger 1.

[0064] In some embodiments, the first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 can be snap-fitted. It can be understood that one end of the third piece 15 and the first sub-heat exchange tube 141 can also be snap-fitted, and the second sub-heat exchange tube 142 and the other end of the third piece 15 can also be snap-fitted.

[0065] Here, it should be noted that, as shown in Figure 13, the second end 1412 of the first sub-heat exchange tube 141 and the third end 1421 of the second sub-heat exchange tube 142 can be provided with internal threads, and the connecting piece can be provided with a necked portion at both ends or one end of the connecting piece, and the necked portion can include an external thread. As long as the thread directions of the two ends of the second end 1412 and the third end 1421 are one positive and one negative, the threads at both ends of the connecting piece are compatible with the threads of the second end 1412 and the third end 1421.

[0066] In some embodiments, as shown in Figure 14, the second end 1412 of the first sub-heat exchange tube 141 includes a flat end portion, the third end 1421 of the second sub-heat exchange tube 142 includes a flat end portion, and the connecting piece is a straight tube. One end of the connecting piece is connected to and communicated with the second end 1412 of the first sub-heat exchange tube 141, and the other end of the connecting piece is connected to and communicated with the third end 1421 of the second sub-heat exchange tube 142. The heat exchanger 1 of this embodiment is easy to process, which can improve production efficiency on the one hand, and on the other hand, by arranging a connecting pipe section at the connection, the strength of the connection section of the heat exchanger 1 can be increased, thereby improving the reliability of the heat exchanger 1.

[0067] In some embodiments, as shown in Figures 15 and 16, the connector can also be of various shapes. Specifically, as shown in Figure 15, the fifth end 151 and the sixth end 152 of the connector can be set as flared portions, and the second end 1412 of the first sub-heat exchange tube 141 can be set as a flat portion or a necked portion, and the third end 1421 of the second sub-heat exchange tube 142 can be set as a flat portion or a necked portion. The fifth end 151 of the connector is connected and communicated with the second end 1412 of the first sub-heat exchange tube 141, and the sixth end 152 of the connector is connected and communicated with the third end 1421 of the second sub-heat exchange tube 142.

[0068] Here, it should be noted that the first end 1411 and the second end 1412 of the connecting piece can also be set to one as a flared portion and the other as a necked portion, one of the second end 1412 and the third end 1421 includes a necked portion, and the other of the second end 1412 and the third end 1421 includes a flared portion.

[0069] In some embodiments, as shown in Figure 16, the connecting piece includes two ends, namely a fifth end 151 and a sixth end 152, the fifth end 151 includes a necked portion, the sixth end 152 includes a necked portion, the necked portion includes an inner cavity, the second end 1412 of the first sub-heat exchange tube 141 includes a flat-end portion, the third end 1421 of the second sub-heat exchange tube 142 includes a flat-end portion, the necked portion is inserted into the inner cavity of the flat-end portion, the second end 1412 is connected and communicated with the fifth end 151, and the third end 1421 is connected and communicated with the sixth end 152.

[0070] In one embodiment, as shown in Figures 17 and 18, the third member 15 can be a connecting member having multiple independent chambers. Specifically, the third member 15 includes multiple partitions 20, which divide the inner cavity of the third member 15 into multiple first sub-cavities. The second end of the first sub-heat exchange tube 141 is connected to the third member 15, and the third end of the second sub-heat exchange tube 142 is connected to the third member 15. The first channel of the first sub-heat exchange tube 141 is connected to a first sub-cavity, and the first sub-cavity is also connected to a second channel. The third member 15 in this embodiment is conducive to improving the assembly efficiency of the heat exchanger, and is also conducive to improving the tensile strength and compressive strength of the connection.

[0071] In some embodiments, as shown in Figures 19 and 20, in some applications with smaller spaces, in order to improve the heat exchange efficiency of the heat exchanger 1, the heat exchange tube is usually bent, so as to achieve the installation of a high-power heat exchanger 1 in a small space, saving space. The bent heat exchange tube includes a bent section 144, 146 and a straight section. The bent section 144, 146 is one, two or more than two. The number of straight sections is related to the bent sections 144, 146. Usually, there is one more straight section than the bent sections 144, 146. As shown in Figures 19 and 20, the heat exchanger 1 includes a first straight section 143, a second straight section 145 and a third straight section 147, as well as a first bent section 144 and a second bent section 146. One end of the first straight section 143 is connected to and communicated with the first piece 11, and the other end of the first straight section 143 is connected to and communicated with the first piece 11. One end is connected to and communicated with one end of the first bending section 144, the other end of the first bending section 144 is connected to and communicated with one end of the second straight section 145, the other end of the second straight section 145 is connected to and communicated with one end of the second bending section 146, the other end of the second bending section 146 is connected to and communicated with one end of the third straight section 147, and the other end of the third straight section 147 is connected to and communicated with the second piece 12. Multiple first bending sections 144 form a first bending area, and multiple second bending sections 146 form a second bending area. Neither the first bending area nor the second bending area is provided with fins 13. When the heat exchanger 1 shown in Figure 19 is used as an outdoor heat exchanger 1, since the outer peripheral cover of the outdoor heat exchanger 1 is protected by a shell, and the wind force in the bending sections 144 and 146 is small, the heat exchange efficiency is low, so the fins 13 can be reduced, which is beneficial to reducing costs.

[0072] In some embodiments, as shown in FIG20 , the heat exchanger 1 includes a first straight section 143, a second straight section 145, and a first bent section 144. One end of the first straight section 143 is connected to and communicates with the first member 11, the other end of the first straight section 143 is connected to and communicates with one end of the first bent section 144, and the other end of the first bent section 144 is connected to and communicates with one end of the second straight section 145. Multiple first bent sections 144 form a first bent region. Unlike some embodiments, the bent region of the heat exchanger 1 shown in FIG20 is provided with a first fin 131. The width of the first fin 131 is smaller than the width of the second fin 132 connected to the straight section. The bent sections 144 and 146 extend through the first fin 131 in the thickness direction of the first fin 131, and a portion of the first fin 131 is located between two adjacent bent sections 144 and 146 in the length direction of the first member 11. In this embodiment, the straight section refers to the general term for the first straight section 143 and the second straight section 145. Since the fins 13 of the bending sections 144 and 146 are easily deformed during the bending process of the heat exchanger 1, the width of the fins 13 connected to the bending sections 144 and 146 is reduced, which is beneficial to reducing the deformation of the fins 13 and increasing the distance between adjacent fins 13, which is beneficial to increasing the air flow rate in the first bending area, and thus is beneficial to improving the heat exchange performance of the heat exchanger 1.

[0073] In some embodiments, such as the heat exchanger 1 shown in Figures 21 to 23, the connection method of the heat exchange tube is similar to that of other embodiments of the present application and is not repeated here. Unlike other embodiments, the heat exchanger 1 of this embodiment includes two different fin 13 spacings. In the heat exchanger 1 shown in Figure 21, the fin 13 connected to the first sub-heat exchange tube 141 is defined as the third fin 133, and the fin 13 connected to the second sub-heat exchange tube 142 is defined as the fourth fin 134. The specifications of the third fin 133 and the fourth fin 134 can be the same or different. In the length direction of the first sub-heat exchange tube 141, the distance between two adjacent third fins 133 is L1, and in the length direction of the second sub-heat exchange tube 142, the distance between two adjacent fourth fins 134 is L2. The value of L2 is smaller than L1, which reduces the spacing between adjacent fins 13 and increases the fins 13, that is, increases the effective heat exchange area of ​​the heat exchanger 1, thereby improving the heat exchange performance of the heat exchanger 1.

[0074] In some embodiments, such as the heat exchanger 1 shown in Figure 24, the fourth part 16 is a circular tube with a cavity, and a plurality of through holes are provided on the wall of the circular tube. The fifth part 19 has a circulation channel. It should be noted that there is no limitation on the shape of the fifth part 19, as long as a hollow pipe with a connecting function is provided. The fourth part 16 is connected and connected to the fifth part 19, and the fifth part 19 is connected and connected to the second part 12. The provision of the fourth part 16 is beneficial to adjusting the refrigerant distribution of the heat exchanger 1 during operation. In some applications, since the indoor heat exchanger 1 and the outdoor heat exchanger 1 have different refrigerant demands during operation, the fourth part 16 can be provided to store part of the refrigerant in the system on the one hand. On the other hand, when the refrigerant flows into the fourth part 16, it is beneficial to evenly mix the refrigerant gas and liquid, and to distribute the refrigerant, thereby improving the heat exchange performance of the heat exchanger 1.

[0075] In some embodiments, as shown in FIG25 , the heat exchanger 1 has two heat exchange areas with different heat exchange performances, separated by a connecting member. A first heat exchange unit is defined as consisting of a plurality of first sub-heat exchange tubes 141, a second heat exchange tube 18, the fins 13 connected thereto, and a sixth member 17. A second sub-heat exchange tube 142, and the fins 13 connected thereto form a second heat exchange unit. The heat exchange area of ​​the first heat exchange unit is greater than that of the second heat exchange unit. The sixth member 17 includes a sixth tube body having a sixth tube lumen. One end of the second heat exchange tube 18 is connected to the sixth member 17, and the other end of the second heat exchange tube 18 is connected to the first member 11. The length of the second heat exchange tube 18 is less than that of the first heat exchange tube 14. In some applications, when the heat exchanger 1 is used as a condenser, the heat exchange area where the second heat exchange tube 18 is located is used as a subcooling section, which is beneficial to improving the heat exchange performance of the heat exchange area where the first heat exchange tube 14 is located. When the heat exchanger 1 is used as an evaporator, the refrigerant flows into the second part 12 in liquid form and then flows out of the second heat exchange tube 18. Since the refrigerant evaporates into a two-phase refrigerant, the gaseous state of this two-phase refrigerant accounts for a large proportion. Therefore, by setting the second heat exchange tube 18 to increase the total flow area of ​​the refrigerant in the second heat exchange unit area, on the one hand, it is beneficial to adjust the distribution of the flow refrigerant, thereby improving the heat exchange performance of the heat exchanger 1.

[0076] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples without contradiction.

[0077] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to direct or indirect connection, detachable direct or indirect connection, or integration; mechanical direct or indirect connection, electrical direct or indirect connection, or communication with each other; direct connection or indirect connection through an intermediate medium; internal communication between two elements or interaction between two elements, unless otherwise expressly specified or limited. Those skilled in the art can understand the specific meanings of the above terms in this application based on specific circumstances.

[0078] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of such features. Throughout the description of this application, "plurality" means at least two, for example, two, three, etc., unless otherwise specifically defined.

[0079] In this application, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it can mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Furthermore, when a first feature is "above," "above," or "above" a second feature, it can mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it can mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0080] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

Claims

1. A heat exchanger, wherein: include: The first (11) and the second (12); Fins (13); A heat exchange tube, wherein there are more than two heat exchange tubes, and the more than two heat exchange tubes are arranged in the length direction of the first member (11); at least part of the fins (13) are located between two adjacent heat exchange tubes in the length direction of the first member; the heat exchange tube comprises a first heat exchange tube (14); the first heat exchange tube (14) comprises a first sub-heat exchange tube (141) and a second sub-heat exchange tube (142); the first sub-heat exchange tube (141) comprises a first end (1411) and a second end (1412); the second sub-heat exchange tube (142) comprises a third end (1421) and a fourth end (1422); the first end (1411) is directly or indirectly connected to the first member (11); the second end (1412) is directly or indirectly connected to the third end (1421); and the fourth end (1422) is directly or indirectly connected to the second member (12).

2. The heat exchanger according to claim 1, wherein: One of the second end portion (1412) and the third end portion (1421) is located within the other.

3. The heat exchanger according to claim 1 or 2, wherein: One of the second end portion (1412) and the third end portion (1421) includes a flared portion, and the other includes a flat portion, and at least a portion of the flat portion is located in the flared portion; or, One of the second end portion (1412) and the third end portion (1421) includes a flared portion, and the other includes a narrowed portion, and at least a portion of the narrowed portion is located in the flared portion.

4. The heat exchanger according to claim 1 or 2, wherein: The second end portion (1412) of the first sub-heat exchange tube (141) has a first threaded portion (14124), and the third end portion (1421) of the second sub-heat exchange tube (142) has a second threaded portion (14214), and one of the first threaded portion (14124) and the second threaded portion (14214) has an internal thread, and the other of the two threaded portions has an external thread.

5. The heat exchanger according to claim 1, wherein: The heat exchanger also includes a third part (15), the third part (15) includes a third tube body, the third tube body has a third tube cavity, the second sub-heat exchange tube (142) is connected to the third part (15), the first sub-heat exchange tube (141) includes a first channel, the second sub-heat exchange tube (142) includes a second channel, the first channel is connected to the third tube cavity, and the second channel is connected to the third tube cavity.

6. The heat exchanger according to claim 5, wherein: The third member further comprises two or more partitions (20), the third lumen comprises two or more first sub-cavities, the partition (20) is provided between two adjacent first sub-cavities in the length direction of the third member, one of the first sub-cavities is connected to the first channel, and the other of the first sub-cavities is connected to the second channel.

7. The heat exchanger according to claim 5, wherein: The third tube body includes a fifth end (151) and a sixth end (152), the fifth end (151) is connected to the second end (1412), the sixth end (152) is connected to the third end (1421), a portion of the first sub-heat exchange tube (141) is located in the third tube cavity, and a portion of the second sub-heat exchange tube (142) is located in the third tube cavity.

8. The heat exchanger according to claim 7, wherein: The fifth end portion (151) includes a third threaded portion (1511), the sixth end portion (152) includes a fourth threaded portion (1521), the second end portion (1412) includes a first threaded portion (14124), the third end portion (1421) includes a second threaded portion (14214), the second end portion (1412) and the fifth end portion (151) are threadedly connected, and the third end portion (1421) and the sixth end portion (152) are threadedly connected.

9. The heat exchanger according to any one of claims 1 to 8, wherein: The first heat exchange tube (14) comprises a bent section (144, 146) and a straight section (143, 145, 147); the straight section (143, 145, 147) is more than two straight sections; the more than two straight sections (143, 145, 147) comprise a first straight section (143) and a second straight section (145); one end of the bent section (144, 146) is connected to one end of the first straight section (143); and the other end of the bent section (144, 146) is connected to one end of the second straight section (145).

10. The heat exchanger according to claim 9, wherein: The fin (13) comprises a first fin (131) and a second fin (132); the first fin (131) is fixedly connected to the bent section (144, 146); at least one of the first fins (131) has a fin width dimension of W1; the second fin (132) is fixedly connected to the straight section (143, 145, 147); at least one of the second fins (132) has a fin width dimension of W2, and W1<W2.

11. The heat exchanger according to claim 10, wherein: The bending section (144, 146) penetrates the first fin (131) in the thickness direction of the first fin (131), and a portion of the first fin (131) is provided between two adjacent bending sections (144, 146) in the length direction of the first member (11).

12. The heat exchanger according to any one of claims 1 to 8, wherein: The fin (13) further comprises a third fin (133) and a fourth fin (134); there are more than two third fins (133); the third fin (133) has a first through hole; a first sub-heat exchange tube (141) penetrates through the first through hole of more than two third fins (133); there are more than two third fins (133); the fourth fin (134) has a second through hole; a second sub-heat exchange tube (142) penetrates through the second through hole of more than two fourth fins (134); in the length direction of the heat exchange tube (14), the distance between at least two adjacent third fins (133) is L1, and the distance between at least two adjacent fourth fins (134) is L2, and L1>L2.

13. The heat exchanger according to any one of claims 1 to 8, wherein: The heat exchanger also includes a fourth component (16), the fourth component (16) includes a fourth tube body, the fourth tube body has a fourth tube cavity, the second component (12) is connected to the fourth component (16), the internal volume of the fourth tube body is S1, the second component (12) has a second tube body, the second tube body has a second tube cavity, the internal volume of the second component (12) is S2, 0.3<S1 / S2<0.

85.

14. The heat exchanger according to any one of claims 1 to 8, wherein: The heat exchanger (1) further comprises a sixth component (17), wherein the sixth component (17) comprises a sixth tube body, wherein the sixth tube body has a sixth tube cavity, and the two or more heat exchange tubes further comprise a second heat exchange tube (18), wherein one end of the second heat exchange tube (18) is connected to the sixth component (17), and the other end of the second heat exchange tube (18) is connected to the first component (11), and the length dimension of the second heat exchange tube (18) is smaller than the length dimension of the first heat exchange tube (14).

Images