Heat exchanger

Abstract

A heat exchanger comprises a first piece, a second piece and fins, the number of the fins is more than two, the fins are arranged at intervals in the first direction perpendicular to the length direction of the first piece, the heat exchanger further comprises heat exchange pipes, at least part of the fins are located between every two adjacent heat exchange pipes in the length direction of the first piece, and the fins are arranged in the second direction at intervals. The number of the heat exchange pipes is more than two, the more than two heat exchange pipes are arranged in the length direction of the first piece, the heat exchange pipes comprise a first heat exchange pipe, the first heat exchange pipe comprises a first heat exchange sub-pipe and a second heat exchange sub-pipe, the first heat exchange sub-pipe comprises a first end part and a second end part, and the second heat exchange sub-pipe comprises a second end part and a third end part. The first sub heat exchange tube comprises a first end part and a second end part, the second sub heat exchange tube comprises a third end part and a fourth end part, the first end part is connected with the first piece, the second end part is connected with the third end part, and the fourth end part is connected with the second piece. According to the heat exchanger provided by the embodiment of the invention, the bending deformation of the heat exchange tube is favorably reduced, and the reliability of the heat exchanger is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of heat exchange, and particularly to a finned tube heat exchanger Background Art

[0002] In related technologies, a heat exchanger mainly includes a plurality of heat exchange tubes and a plurality of fins arranged in parallel. Refrigerant flows inside the heat exchange tubes. One heat exchange tube penetrates through a plurality of fins, and the fins exchange heat with air. The plurality of fins are spaced apart in the length direction of the heat exchange tube. In some applications, since a heat exchanger with a relatively large heat exchange capacity needs to be provided, heat exchangers with relatively large specifications are usually designed. However, due to the relatively long length and small diameter of the heat exchange tubes with large specifications, the heat exchange tubes are likely to be bent and deformed during the assembly process, thus increasing the installation speed of the heat exchange tubes and fins and affecting the reliability of the heat exchanger Summary of the Invention

[0003] Therefore, the present invention provides a heat exchanger, which is beneficial to reducing the bending deformation of the heat exchange tubes and improving the assembly efficiency of the heat exchanger

[0004] The present invention provides a heat exchanger, including a first member, a second member and fins. 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

[0005] The heat exchanger further includes heat exchange tubes. 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. At least part of the fins are located between two adjacent heat exchange tubes in the length direction of the first member. The heat exchange tubes include a first heat exchange tube, and 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, and the second sub-heat exchange tube includes a third end and a fourth end. The first end is connected to the first member, the second end is connected to the third end, and the fourth end is connected to the second member

[0006] The heat exchange tubes of the heat exchanger according to the embodiments of the present invention include 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 member. The second sub-heat exchange tube includes a third end and a fourth end, and the fourth end is connected to the second member. The second end is connected to the third end, so as to connect 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 tubes, improving the reliability of the heat exchange tubes, and also improving the assembly efficiency of the heat exchange tubes and fins

[0007] In some embodiments, the heat exchanger includes at least one of the following technical features a to c

[0008] a). The second end of the first sub-heat exchange tube includes a flared portion which has an inner cavity. The third end of the second sub-heat exchange tube includes a necked portion or a flat end portion or a flared portion, and at least part of the necked portion or the flat end portion or the flared portion of the third end is located in the inner cavity of the flared portion of the second end;

[0009] b). The second end of the first sub-heat exchange tube includes a necked portion which has an inner cavity. The third end of the second sub-heat exchange tube includes a necked portion or a flat end portion or a flared portion, and at least part of the necked portion or the flat end portion of the third end is located in the inner cavity of the necked portion of the second end;

[0010] c). The second end of the first sub-heat exchange tube includes a flat end portion which has an inner cavity, and at least part of the necked portion or the flat end portion or the flared portion of the third end is located in the inner cavity of the necked portion of the second end.

[0011] In some embodiments, the second end of the first sub-heat exchange tube has a first threaded portion, and the third end of the second sub-heat exchange tube has a second threaded portion. One of the two threaded portions 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.

[0012] In some embodiments, the heat exchanger includes a third member which includes a third lumen. The first sub-heat exchange tube is connected to the first member, and the second sub-heat exchange tube is connected to the third member. The first sub-heat exchange tube includes a first channel, and the second sub-heat exchange tube includes a second channel. The first channel communicates with the third lumen, and the second channel communicates with the third lumen.

[0013] In some embodiments, the third lumen includes a plurality of first sub-lumens which are not connected to each other. One of the first sub-lumens communicates with the first channel, and this one of the first sub-lumens communicates with the second channel.

[0014] In some embodiments, the third member includes a third tube body which has a third lumen. The third tube body includes a fifth end and a sixth end. The fifth end is connected to the second end, and the sixth end is connected to the third end. Part of the first sub-heat exchange tube is located in the third lumen, and part of the second sub-heat exchange tube is located in the third lumen.

[0015] 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, and the third end includes a second threaded portion. The second end and the fifth end are in threaded engagement connection, and the third end and the sixth end are in threaded engagement connection.

[0016] In some embodiments, the first heat exchange tube includes a bent section and straight sections. The straight sections are two or more straight sections, and the two or more 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.

[0017] In some embodiments, two or more of the bent sections are arranged in the length direction of the first part. The bent section penetrates through the through hole of the fin, and a part of the fin is located between two adjacent bent sections in the length direction of the first part.

[0018] In some embodiments, the fin includes a first fin and a second fin. The bent section penetrates through the through hole of the first fin. The first fin is fixedly connected to the bent section. The fin width dimension of at least one of the first fins is W1. The second fin is fixedly connected to the straight section. The fin width dimension of at least one of the second fins is W2, and W1 < W2.

[0019] In some embodiments, the fin includes a third fin and a fourth fin. There are two or more of the third fins. The third fin has a first through hole. One first sub-heat exchange tube penetrates through the first through holes of two or more of the third fins. There are two or more of the fourth fins. The fourth fin has a second through hole. One second sub-heat exchange tube penetrates through the second through holes of two or more of the 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.

[0020] In some embodiments, the heat exchanger further includes a fourth part. The fourth part includes a fourth tube body. The fourth tube body has a fourth tube cavity. The second part is connected to the fourth part. The internal volume of the fourth tube body is S1. The second part has a second tube body. The second tube body has a second tube cavity. The internal volume of the second part (12) is S2, and 0.3 < S1 / S2 < 0.85.

[0021] In some embodiments, the heat exchanger further includes a sixth part. The sixth part includes a sixth tube body. The sixth part body has a sixth tube cavity. Two or more of the heat exchange tubes further include a second heat exchange tube. One end of the second heat exchange tube is connected to the sixth part, and the other end of the second heat exchange tube is connected to the second part. The length dimension of the second heat exchange tube is smaller than the length dimension of the first heat exchange tube. BRIEF DESCRIPTION OF THE DRAWINGS:

[0022] Figure 1 is a schematic structural diagram of a heat exchanger according to an embodiment of the present invention;

[0023] Figure 2 is a schematic structural diagram before assembling the heat exchanger embodiment shown in Figure 1 ;

[0024] Figure 3 is a schematic structural diagram before assembling another heat exchanger embodiment shown in Figure 1 ;

[0025] Figure 4 is a schematic structural diagram before assembling yet another heat exchanger embodiment shown in Figure 1 ;

[0026] Figure 5 is a schematic structural diagram before assembling still another heat exchanger embodiment shown in Figure 1 ;

[0027] Figure 6 is a schematic structural diagram before assembling yet another different heat exchanger embodiment shown in Figure 1 ;

[0028] Figure 7 is a schematic structural diagram before assembling yet another different heat exchanger embodiment shown in Figure 1 ;

[0029] Figure 8 is a schematic structural diagram before assembling yet another different heat exchanger embodiment shown in Figure 1 ;

[0030] Figure 9 is a schematic structural diagram before assembling yet another different heat exchanger embodiment shown in Figure 1 ;

[0031] Figure 10 is a schematic structural diagram before assembling yet another different heat exchanger embodiment shown in Figure 1 ;

[0032] Figure 11 is a schematic structural diagram of a heat exchanger according to another embodiment of the present invention;

[0033] Figure 12 is Figure 11 a schematic structural diagram before assembling another heat exchanger embodiment shown in

[0034] Figure 13 is a schematic structural diagram of a heat exchanger according to still another embodiment of the present invention;

[0035] Figure 14 is a schematic structural diagram of a heat exchanger according to yet another still embodiment of the present invention;

[0036] Figure 15Schematic structural diagram of a heat exchanger according to yet another embodiment of the present invention;

[0037] Figure 16 Schematic structural diagram of a heat exchanger according to yet another embodiment of the present invention;

[0038] Figure 17 Schematic structural diagram of a heat exchanger according to yet another embodiment of the present invention;

[0039] Figure 18 Schematic structural diagram of a heat exchanger according to yet another embodiment of the present invention;

[0040] Figure 19 Schematic structural diagram of a heat exchanger according to yet another embodiment of the present invention;

[0041] Figure 20 Schematic structural diagram of a heat exchanger according to yet another embodiment of the present invention;

[0042] Figure 21 Schematic structural diagram of a heat exchanger according to yet another embodiment of the present invention;

[0043] Figure 22 Is Figure 21 Schematic enlarged view of the structure at location A of the heat exchanger shown;

[0044] Figure 23 Is Figure 21 Schematic enlarged view of the structure at location B of the heat exchanger shown;

[0045] Figure 24 Schematic structural diagram of a heat exchanger according to yet another embodiment of the present invention;

[0046] Figure 25 Schematic structural diagram of a heat exchanger according to yet another embodiment of the present invention.

[0047] Reference numerals:

[0048] Heat exchanger 11,

[0049] First piece 11, second piece 12,

[0050] Fins 1313, first fin 131, second fin 132, third fin 133,

[0051] First heat exchange tube 14, first sub-heat exchange tube 141, first end 1411, second end 1412, flared portion 14121 of the second end, constricted portion 14122 of the second end, flat portion (14123) of the second end, first threaded portion 14124,

[0052] The second sub-heat exchange tube 142, the third end portion 14211, the fourth end portion 1422, the necked portion 14211 of the third end portion, the flat portion 14212 of the third end portion, the flared portion 14213 of the third end portion, the second threaded portion 14214

[0053] The second heat exchange tube 18

[0054] The first straight section 143, the second straight section 145, the third straight section 147

[0055] The first bending section 144, 146144, the second bending section 144, 146146

[0056] The third part 15, the fifth end portion 151, the sixth end portion 152, the third threaded portion 1511, the fourth threaded portion 1521

[0057] The fourth part 16

[0058] The fifth part 19

[0059] The sixth part 17

[0060] The partition plate 20 Specific embodiments

[0061] The embodiments of the present invention will be described in detail below. 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 explain the present invention and should not be construed as limiting the present invention. In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or fixture referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

[0062] Such as Figures 1 to 22As shown, the heat exchanger 1 according to the embodiment of the present invention 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 material. The first piece 11 and the second piece 12 both have a tube cavity, and the tube cavity can allow refrigerant to flow. The fin 13 is a sheet-like structure made of metal material 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, and the groove 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, and 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 the shapes of the multiple first heat exchange tubes 14 can be the same. The first heat exchange tube 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 heat exchange 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 heat exchange channels, which are arranged in the width direction of the second sub-heat exchange tube 142. The first heat exchange channels and the second heat exchange 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 a plurality of fins 13. The second sub-heat exchange tube 142 passes through a 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.

[0063] 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 ones, it is helpful to reduce the bending of the heat exchange tube and improve the assembly efficiency.

[0064] In some embodiments, Figure 1 , Figure 10 , Figures 12 to 16 As shown, 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 a third pipe fitting.

[0065] In some embodiments, the structure of the heat exchanger 1 before assembly is as follows: Figures 2 to 10 As shown, specifically, Figure 2As shown, 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 part 11. The second end 1412 includes a flared portion. The flared portion refers to a tube section where the diameter value of this part of the tube section is larger than that of other parts of the first sub-heat exchange tube 141, or it can also refer to a tube section where the perimeter of the cross-section of this part of the tube section is greater than the perimeter of the cross-section 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 mouth portion. The flat mouth portion refers to a tube section where the diameter of this part of the tube section is the same as that of other parts of the second sub-heat exchange tube 142, or it can also refer to a tube section where the perimeter of the cross-section of this part of the tube section is the same as the perimeter of the cross-section of other parts of the second sub-heat exchange tube 142. The fourth end 1422 is connected to the second part 12. At least part of the flat mouth portion is located in the inner cavity of the flared portion, and the flared portion is connected to the flat mouth portion in a matching manner. It should be noted that in some embodiments, it can also be as Figure 8 As shown, the second end 1412 includes a flat mouth portion, and the third end 1421 includes a flared portion, which can also achieve the effect of connecting the first sub-heat exchange tube 141 and the second sub-heat exchange tube 142. By connecting the two sub-heat exchange tubes, the effective heat exchange area of the heat exchanger 1 can be increased, and the heat exchange performance of the heat exchanger 1 can be further improved.

[0066] A through-tube heat exchanger 1 according to an embodiment of the present invention. The heat exchange tubes of the through-tube heat exchanger 1 need to pass through the through-holes of multiple fins 13. However, a metal fin 13 according to an embodiment of the present invention includes an aluminum foil fin 13 made of aluminum. The fin 13 has a relatively thin thickness, and the diameter of the heat exchange tube is only slightly smaller than the diameter of the through-hole of the fin 13. Therefore, when the heat exchange tube needs to pass through up to dozens of fins 13, due to the relatively soft material of the fin 13 and the relatively long length of the heat exchange tube, the heat exchange tube is prone to deviation when passing through the fins 13, resulting in deformation of the fins 13. Therefore, the length of the heat exchange tube can be shortened. By using the relatively short first sub-heat exchange tube 141 and second sub-heat exchange tube 142 to cooperate with multiple fins 13, the fins 13 prone to deviation can be reduced. In some applications, due to the deformation of the fins 13, the distance between adjacent fins 13 is reduced, and even two fins 13 overlap each other, thereby blocking the flow of air. 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 during the operation of the heat exchanger 1.

[0067] In some embodiments, specifically, as Figure 3As shown, 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 part 11. The second end 1412 includes a flared portion which 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 reduced-diameter portion. The reduced-diameter portion refers to a tube section whose tube diameter is smaller than that of other tube sections of the second sub-heat exchange tube 142, or it can also refer to a tube section whose cross-sectional perimeter is smaller than that of other tube sections of the second sub-heat exchange tube 142. The reduced-diameter portion has an inner cavity. The fourth end 1422 is connected to the second part 12. At least part of the reduced-diameter 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 reduced-diameter portion are cooperatively connected. It should be noted that in some embodiments, such as Figure 9 As shown, 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 part 11. The second end 1412 of the first sub-heat exchange tube 141 includes a reduced-diameter portion. 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. At least part of the reduced-diameter portion of the second end 1412 is located in the inner cavity of the flared portion of the third end 1421. The first end 1411 is connected and communicated with the first part 11, and the fourth end 1422 is connected and communicated with the second part 12. The first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 are connected and communicated through the cooperation of the reduced-diameter and flared tube openings. The heat exchanger 1 of this embodiment is beneficial to saving materials and reducing material costs.

[0068] In some embodiments, specifically, such as Figure 4 As shown, 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 part 11. The second end 1412 includes a flared portion which 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 which has an inner cavity. The two ends of the second end 1412 and the third end 1421 can increase the flow area of the heat exchange tube channel by flaring, thereby reducing the frictional force of the fluid, reducing the resistance of the system, increasing the outflow, and being beneficial to improving the heat exchange performance of the heat exchanger 1 in some application conditions.

[0069] In some embodiments, specifically, such as Figure 5As shown, 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 is connected and communicated with the third end 1421, 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 tube, thereby facilitating the improvement of the heat exchange capacity of the heat exchanger 1.

[0070] In some embodiments, specifically, Figure 6 As shown, 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 constricted portion, the constricted 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, and the cross-sectional areas of the first sub-heat exchange tube 141 and the second sub-heat exchange tube 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, so the tube mouth of the second sub-heat exchange tube 142 is connected to and communicated with the first sub-heat exchange tube 141 in the form of a constricted end. It should be noted that in some embodiments, such as Figure 7 As shown, the first end 1411 of the first sub-heat exchange tube 141 can be provided with a constricted portion, and the third end 1421 of the second sub-heat exchange tube 142 can be provided with a flat portion. In some embodiments, since the heat exchange capacity on the windward side of the heat exchanger 1 is strong and each first sub-heat exchange tube 141 has the same structure, the heat exchange performance on the windward side of the heat exchanger 1 can be reduced by reducing the tube diameter, that is, reducing the cross-sectional area of ​​the flow channel of the first sub-heat exchange tube 141 and reducing the total cross-sectional area of ​​the flow channel of the first sub-heat exchange tube 141. When the heat exchanger 1 is used as an evaporator, the heat exchange capacity on the windward side can be reduced, thereby reducing frosting, and thus delaying the frosting cycle.

[0071] In some embodiments, the first sub-heat exchange tube 141 can be set as a single channel or as a plurality of 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.

[0072] In some embodiments,Figure 10 As shown, the first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 are connected by a spiral connection. Specifically, 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 part 11. The second end 1412 includes a first threaded portion, the first threaded portion has an external thread, and the first threaded portion 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, the second threaded portion has an internal thread, and the internal thread and the external thread are connected and assembled in cooperation. Specifically, in the heat exchanger 1 of this embodiment, each first sub-heat exchange tube 141 passes through a plurality of fins 13. The first end 1411 of the first sub-heat exchange tube 141 is connected and communicated with the first part 11. The second end 1412 with an external thread in each first sub-heat exchange tube 141 is connected to the third end 1421 with an internal thread in each second sub-heat exchange tube 142, so as to realize the connection and communication between the second end 1412 and 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 part 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), which can also realize the threaded connection and communication between the first sub-heat exchange tube 141 and the second sub-heat exchange tube 142. The heat exchange tubes connected by threaded connection can strengthen the connection strength at the connection of the first sub-heat exchange tube 141 and the second sub-heat exchange tube 142, thereby improving the reliability of the heat exchanger 1.

[0073] In some embodiments, the first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 are connected by a connecting member. Here, it should be noted that the connecting member can be a connecting pipe section or a connecting block, and the connecting member has a through inner cavity or channel. Specifically, as Figure 12 and Figure 14 shown, the connecting member is a connecting pipe section. The connecting member 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.

[0074] Specifically, in some embodiments, as Figure 13As shown, the fifth end portion 151 includes a third threaded portion 1511 which has an inner cavity and also has an internal thread. The sixth end portion 152 includes a fourth threaded portion 1521 which has an inner cavity and also includes 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. The second sub-heat exchange tube 142 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 which has an inner cavity and also has an external thread. The external thread of the first threaded portion is in mating connection with the internal thread of the third threaded portion 1511. That is to say, the second end portion 1412 and the fifth end portion 151 are in threaded mating connection. The third end portion 1421 of the second sub-heat exchange tube 142 includes a second threaded portion which has an inner cavity and also includes an external thread. The external thread of the second threaded portion is in mating connection with the internal thread of the fourth threaded portion 1521. That is to say, the third end portion 1421 and the sixth end portion 152 are in threaded connection and communicated. The first sub-heat exchange tube 141, the connecting piece and the second sub-heat exchange tube 142 are in communication with each other. More specifically, the external thread directions of the first threaded portion and the second threaded portion are opposite to each other. It can be understood that when the external thread of the first threaded portion is a left-handed thread, the external thread of the second threaded portion is a right-handed thread. As long as the internal threads at both ends of the connecting piece are adapted to the threads of the first threaded portion and the second threaded portion, connecting the first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 by means of the connecting piece 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. Therefore, it is beneficial to improve the strength of the connection part of the heat exchange tubes and is also beneficial to enhancing the reliability of the heat exchanger 1.

[0075] In some embodiments, the first sub-heat exchange tube 141 and the second sub-heat exchange tube 142 can be in snap-fit connection. It can be understood that one end of the third piece 15 and the first sub-heat exchange tube 141 can also be in snap-fit connection, and the other end of the second sub-heat exchange tube 142 and the third piece 15 can also be in snap-fit connection in the same way.

[0076] Here, it should be noted that as Figure 13 shown in the heat exchanger 1, the second end portion 1412 of the first sub-heat exchange tube 141 and the third end portion 1421 of the second sub-heat exchange tube 142 can be provided with internal threads, and the connecting piece can be provided such that both ends or one end of the connecting piece is configured with a reduced diameter portion which can include an external thread. As long as the thread directions of the two end portions of the second end portion 1412 and the third end portion 1421 are opposite to each other, and the threads at both ends of the connecting piece are adapted to the threads of the second end portion 1412 and the third end portion 1421.

[0077] In some embodiments, as Figure 14 shown, the second end portion 1412 of the first sub-heat exchange tube 141 includes a flat mouth portion, the third end portion 1421 of the second sub-heat exchange tube 142 includes a flat mouth portion, the connecting member is a straight tube, one end portion of the connecting member is connected and communicated with the second end portion 1412 of the first sub-heat exchange tube 141, and the other end portion of the connecting member is connected and communicated with the third end portion 1421 of the second sub-heat exchange tube 142. The heat exchanger 1 of this embodiment is convenient to process. On the one hand, the production efficiency can be improved. On the other hand, by providing 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.

[0078] In some embodiments, as Figure 15 and Figure 16 shown, the connecting member can also be of various shapes. Specifically, as Figure 15 shown, the fifth end portion 151 and the sixth end portion 152 of the connecting member can be provided as flared mouth portions, while the second end portion 1412 of the first sub-heat exchange tube 141 can be provided as a flat mouth portion or a reduced mouth portion, and the third end portion 1421 of the second sub-heat exchange tube 142 can be provided as a flat mouth portion or a reduced mouth portion. The fifth end portion 151 of the connecting member is connected and communicated with the second end portion 1412 of the first sub-heat exchange tube 141, and the sixth end portion 152 of the connecting member is connected and communicated with the third end portion 1421 of the second sub-heat exchange tube 142.

[0079] Here, it should be noted that one of the first end portion 1411 and the second end portion 1412 of the connecting member can also be provided as a flared mouth portion and the other as a reduced mouth portion, and one of the second end portion 1412 and the third end portion 1421 includes a reduced mouth portion, and the other of the second end portion 1412 and the third end portion 1421 includes a flared mouth portion.

[0080] In some embodiments, as Figure 16 shown, the connecting member includes two end portions, namely the fifth end portion 151 and the sixth end portion 152. The fifth end portion 151 includes a reduced mouth portion, the sixth end portion 152 includes a reduced mouth portion. The reduced mouth portion includes an inner cavity. The second end portion 1412 of the first sub-heat exchange tube 141 includes a flat mouth portion, and the third end portion 1421 of the second sub-heat exchange tube 142 includes a flat mouth portion. The reduced mouth portion is inserted into the inner cavity of the flat mouth portion. The second end portion 1412 is connected and communicated with the fifth end portion 151, and the third end portion 1421 is connected and communicated with the sixth end portion 152.

[0081] In one embodiment, as Figure 17 and Figure 18As shown, the third component 15 can be a connecting piece with multiple independent chambers. Specifically, the fifth component 15 includes multiple partitions 20. The partitions 20 divide the inner cavity of the third component 15 into multiple sub-chambers. The second end of the first sub-heat exchange tube is connected to the third component, and the third end of the second heat exchange tube is connected to the third component. The first channel of the first sub-heat exchange tube communicates with one sub-chamber, and this one sub-chamber also communicates with a second channel. The third component 15 in this embodiment is beneficial to improving the assembly efficiency of the heat exchanger, and is also beneficial to improving the tensile strength and pressure resistance at the connection.

[0082] In some embodiments, such as Figure 19 and Figure 20 As shown, in some application fields with small space, in order to improve the heat exchange efficiency of the heat exchanger 1, the heat exchange tubes are usually bent, so as to realize the installation of a high-power heat exchanger 1 in a small space, saving space. The bent heat exchange tubes include bent sections 144, 146 and straight sections. The number of bent sections 144, 146 is one or two or more than two. The number of straight sections is related to the bent sections 144, 146. Usually, the number of straight sections is one more than the bent sections 144, 146. Such as Figure 19 and Figure 20 As shown in the heat exchanger 1, 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 144,146144 and a first bent section 144,146146. One end of the first straight section 143 is connected and communicated with the first component 11. The other end of the first straight section 143 is connected and communicated with one end of the first bent section 144,146144. The other end of the first bent section 144,146144 is connected and communicated with one end of the second straight section 145. The other end of the second straight section 145 is connected and communicated with one end of the first bent section 144,146146. The other end of the first bent section 144,146146 is connected and communicated with one end of the third straight section 147. The other end of the third straight section 147 is connected and communicated with the second component 12. Multiple first bent sections 144,146144 form a first bent area, and multiple first bent sections 144,146146 form a second bent area. No fins 13 are provided in the first bent area and the second bent area. When Figure 19 When the heat exchanger 1 shown is used as an outdoor heat exchanger 1, since the outdoor heat exchanger 1 is covered with a housing for protection, and the wind force in the area of the bent sections 144, 146 is small and the heat exchange efficiency is low, the fins 13 can be reduced, which is beneficial to reducing costs.

[0083] In some embodiments, such as Figure 20The heat exchanger 1 shown includes a first straight section 143, a second straight section 145, and first bending sections 144, 146. One end of the first straight section 143 is connected and communicated with the first component 11. The other end of the first straight section 143 is connected and communicated with one end of the first bending sections 144, 146. The other end of the first bending sections 144, 146 is connected and communicated with one end of the second straight section 145. The multiple first bending sections 144, 146 form a first bending area. Different from some embodiments Figure 20 In the embodiment of the heat exchanger 1 shown, first fins 13 are provided in the bending area. The width dimension of the fins 13 of the first fins 13 is smaller than the width dimension of the fins 13 connected to the straight section. In this embodiment, the straight section refers to the general term of the first straight section 143 and the second straight section 145. Because during the bending process of the heat exchanger 1, the fins 13 of the bending sections 144, 146 are prone to deformation, the width of the fins 13 connected to the bending sections 144, 146 is reduced, which is beneficial to reducing the deformation of the fins 13, increasing the distance between adjacent fins 13, and beneficial to increasing the air flow volume in the first bending area. Therefore, it is beneficial to improve the heat exchange performance of the heat exchanger 1.

[0084] In some embodiments, such as Figures 21 to 23 For the heat exchanger 1 shown, the connection manner of the heat exchange tubes is similar to other embodiments of the present invention and will not be repeatedly defined here. Different from other embodiments, the heat exchanger 1 of this embodiment includes two different fin 13 spacings, such as Figure 21 For the heat exchanger 1 shown, the fins 13 connected to the first sub-heat exchange tube 141 are defined as the second fins 13, and the fins 13 connected to the second sub-heat exchange tube 142 are defined as the third fins 13. The specifications of the second fins 13 and the third fins 13 may be the same or different. In the length direction of the first heat exchange tube 14, the distance between two adjacent first fins 13 is L1. In the length direction of the second heat exchange tube 18, the distance between two adjacent second fins 13 is L2, and the value of L2 is less than L1. The distance between adjacent fins 13 is reduced, and the fins 13 are increased, that is, the effective heat exchange area of the heat exchanger 1 is increased. Therefore, it is beneficial to improve the heat exchange performance of the heat exchanger 1.

[0085] In some embodiments, such as Figure 24The heat exchanger 1 shown has a circular tube 16 as the fourth component, with a plurality of through holes provided in the tube wall of the circular tube. The fifth component 19 has a flow passage. It should be noted that the shape of the fifth component 19 is not limited as long as it has a hollow pipe with a connecting function. The fourth component 16 is connected and communicated with the fifth component 19, and the fifth component 19 is connected and communicated with the second component 12. The provision of the fourth component 16 is beneficial to adjusting the refrigerant distribution in the heat exchanger 1 during operation. In some applications, since the refrigerant demand of the indoor heat exchanger 1 and the outdoor heat exchanger 1 is different during operation, therefore, by providing the fourth component 16, on the one hand, it can be used to store part of the refrigerant in the system. On the other hand, after the refrigerant flows into the fourth component 16, it is beneficial to make the refrigerant gas-liquid mixture uniform, which is conducive to refrigerant distribution, and thus conducive to improving the heat exchange performance of the heat exchanger 1.

[0086] In some embodiments, such as Figure 25 the heat exchanger 1 shown. Assuming that it is demarcated by the connecting piece, the heat exchanger 1 has two heat exchange areas with different heat exchange performances. It is defined that a plurality of first sub-heat exchange tubes 141, second heat exchange tubes 18, and fins 13 and the sixth component 17 connected to them form the first heat exchange unit, and the second sub-heat exchange tubes 142 and the fins 13 connected to the second sub-heat exchange tubes 142 form the second heat exchange unit. The heat exchange area of the first heat exchange unit is larger than that of the second heat exchange unit. In some applications, when the heat exchanger 1 is used as an evaporator, the refrigerant flows into the second component 12 in a liquid state and then flows out from the second heat exchange tubes 18. Since the refrigerant evaporates into a two-phase refrigerant and the gaseous phase of this two-phase refrigerant accounts for a relatively large proportion, by providing the second heat exchange tubes 18, it is beneficial 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 flowing refrigerant, and thus beneficial to improving the heat exchange performance of the heat exchanger 1.

[0087] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic expressions 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 a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0088] In the present invention, unless otherwise clearly specified or limited, the terms "installed", "connected", "coupled", "fixed", etc. shall be construed in a broad sense. For example, it may be a direct connection or an indirect connection, a detachable direct or indirect connection, or integrated; it may be a mechanical direct or indirect connection, an electrical direct or indirect connection or communication with each other; it may be directly connected, or indirectly connected through an intermediate medium, which may be the internal communication of two components or the interaction relationship between two components, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0089] In addition, 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 quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise specifically and clearly defined.

[0090] In the present invention, unless otherwise clearly specified or limited, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely means that the first feature has a higher horizontal height than the second feature. The first feature being "under", "beneath" and "underneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely means that the first feature has a lower horizontal height than the second feature.

[0091] Although the embodiments of the present invention have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those of ordinary skill in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A heat exchanger, characterized in that, it includes: a first member (11) and a second member (12); fins (13); heat exchange tubes, there are more than two of the 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 ones of the heat exchange tubes in the length direction of the first member, the heat exchange tubes include a first heat exchange tube (14), 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 first end (1411) and a second end (1412), the second sub-heat exchange tube (142) includes 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, characterized in that, at least one of the second end and the third end is located in the other.

3. The heat exchanger according to claim 1 or 2, characterized in that, one of the second end and the third end includes a flared portion, the other includes a flat mouth portion, and at least part of the flat mouth portion is located in the flared portion; or, one of the second end and the third end includes a flared portion, the other includes a reduced diameter portion, the second end includes a flared portion, and at least part of the reduced diameter portion is located in the flared portion.

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

5. The heat exchanger according to claim 1, characterized in that, the heat exchanger further includes a third member, the third member (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 member (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 communicates with the third tube cavity, and the second channel communicates with the third tube cavity.

6. The heat exchanger according to claim 5, characterized in that, the third member further includes more than two partition plates, the third tube cavity includes more than two first sub-cavities, there is the partition plate between two adjacent ones of the first sub-cavities in the length direction of the third member, one of the first sub-cavities communicates with the first channel, and this one of the first sub-cavities communicates with the second channel.

7. The heat exchanger according to claim 5, wherein, the third tube body includes a fifth end portion (151) and a sixth end portion (152), the fifth end portion (151) is connected to the second end portion (1412), the sixth end portion (152) is connected to the third end portion (1421), a part of the first sub-heat exchange tube (141) is located in the third tube cavity, and a part 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 thread portion (1511), the sixth end portion (152) includes a fourth thread portion (1521), the second end portion (1412) includes a first thread portion, the third end portion (1421) includes a second thread portion (14214), the second end portion (1412) and the fifth end portion (151) are connected by screw-thread fit, and the third end portion (1421) and the sixth end portion (152) are connected by screw-thread fit.

9. The heat exchanger according to any one of claims 1 to 8, wherein, the first heat exchange tube (14) includes bending segments (144, 146) and straight segments (143, 145, 147), the straight segments (143, 145, 147) are two or more straight segments, the two or more straight segments (143, 145, 147) include a first straight segment (143) and a second straight segment (145), one end of the bending segment (144, 146) is connected to one end of the first straight segment (143), and the other end of the bending segment (144, 146) is connected to one end of the second straight segment (145).

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

11. The heat exchanger according to any one of claims 1 to 8, wherein, The fin (13) further includes a third fin (133) and a fourth fin (134). There are more than two third fins (133), and the third fin (133) has a first through hole. One first sub-heat exchange tube (141) penetrates through the first through holes of more than two third fins (133). There are more than two third fins (133). The fourth fin (134) has a second through hole. One second sub-heat exchange tube (142) penetrates through the second through holes 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.

12. The heat exchanger according to any one of claims 1 to 8, characterized in that, the heat exchanger further includes a fourth member (16). The fourth member (16) includes a fourth tube body, and the fourth tube body has a fourth tube cavity. The second member (12) is connected to the fourth member (16). The internal volume of the fourth tube body is S1. The second member has a second tube body, and the second tube body has a second tube cavity. The internal volume of the second member (12) is S2, and 0.3 < S1 / S2 < 0.

85.

13. The heat exchanger according to any one of claims 1 to 8, characterized in that, the heat exchanger (1) further includes a sixth member (17). The sixth member (17) includes a sixth tube body, and the sixth member (17) has a sixth tube cavity. More than two heat exchange tubes further include a second heat exchange tube (18). 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 second member (12). The length dimension of the second heat exchange tube (18) is smaller than the length dimension of the first heat exchange tube (14).

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