Heat exchanger and heat exchange system

Abstract

The application provides a heat exchanger and a heat exchange system. The heat exchanger comprises a first pipe, a second pipe and a plurality of heat exchange pipes. The plurality of heat exchange pipes are connected to the first pipe and the second pipe. The first pipe comprises a first channel, a first piece, a second piece, a third piece, a first cavity and a plurality of first holes. The first channel is arranged in a surrounding manner. The second piece is located between the first piece and the third piece. The first cavity is located between the second piece and the third piece. The first cavity is connected to the heat exchange pipe. The first cavity comprises a plurality of first sub-cavities arranged along the length direction of the first pipe. The first sub-cavities are not connected to each other. The first holes are arranged in a plurality of modes. The first holes penetrate the second piece along the thickness direction of the first pipe. At least one first hole is connected to one first sub-cavity. The first channel is connected to the first cavity through the plurality of first holes. After the refrigerant enters the first channel, the refrigerant circulates in the first channel and enters the heat exchange pipe through the first holes and the first cavity. The heat exchanger is beneficial to fine adjustment of the distribution of the refrigerant, and thus the heat exchange efficiency of the heat exchanger is improved.

Description

Technical field

[0001] The present invention relates to the field of heat exchange technology, and in particular to a heat exchanger and a heat exchange system. [Background Technology]

[0002] In related art, in air conditioning heat exchange systems, refrigerant entering the heat exchanger travels different distances before entering each heat exchange tube for heat exchange. When there are a large number of heat exchange tubes, the resistance along the way the refrigerant reaches each tube varies significantly, leading to uneven distribution of the refrigerant across the tubes and affecting the heat exchange performance of the tubes. If the refrigerant entering the heat exchanger is in a gas-liquid two-phase state, the gas and liquid phases will separate, further leading to uneven distribution of the refrigerant across the tubes and reducing the heat exchange efficiency of the heat exchanger. [Summary of the invention]

[0003] According to the present application, a heat exchanger is proposed, which helps to regulate the distribution of refrigerant and is beneficial to improving the heat exchange efficiency of the heat exchanger.

[0004] On the one hand, the present application provides a heat exchanger, wherein the heat exchanger includes a first tube, a second tube and a plurality of heat exchange tubes, wherein the heat exchange tube is directly or indirectly connected to the first tube, and the heat exchange tube is directly or indirectly connected to the second tube, the first tube includes: a first channel, the first channel includes a first sub-channel and a second sub-channel, the first sub-channel is arranged along the length direction of the first tube, the second sub-channel is arranged along the length direction of the first tube, the first sub-channel and the second sub-channel are spaced apart in the width direction of the first tube, the first channel also includes a third sub-channel, the third sub-channel connects the first sub-channel and the second sub-channel; a first piece, a second piece and a third piece, the second piece is located between the first piece and the third piece in the thickness direction of the first tube, and the third piece is directly or indirectly connected to the heat exchange tube The heat exchanger comprises a first chamber, a wall surrounding the first chamber comprising the second member and the third member; the first chamber comprising a plurality of first sub-cavities, the plurality of first sub-cavities being spaced apart along the length of the first tube, with no two adjacent first sub-cavities along the length of the first tube being directly connected; the minimum length of at least one first sub-cavity along the length of the first tube being L1, and the minimum length of at least another first sub-cavity along the length of the first tube being L2, wherein L2 is greater than or equal to L1; the second member further comprising a plurality of first holes, the first holes being provided through the second member, and at least one first hole being connected to a first sub-cavity; the first sub-channel being connected to the first chamber via the plurality of first holes, and / or the second sub-channel being connected to the first chamber via the plurality of first holes. During operation of the heat exchanger, after entering the first tube, the refrigerant circulates within the first channel through the first, second, and third sub-channels, and enters the first chamber along the first hole, and then enters the heat exchange tube through each of the first sub-cavities. The above structure helps regulate refrigerant distribution, thereby improving the heat exchange efficiency of the heat exchanger.

[0005] In some embodiments, the heat exchanger further includes a third tube, the first channel further includes a fifth sub-channel, the fifth sub-channel is connected to the first sub-channel, the fifth sub-channel includes a first opening, the first opening is connected to the third tube, and a partial flow cross-sectional area of ​​the fifth sub-channel is smaller than the flow cross-sectional area of ​​other parts of the fifth sub-channel.

[0006] In some embodiments, the first piece has a raised portion, and the raised portion has a length in the longitudinal direction of the first tube. The first piece is fixedly connected to the second piece. The wall that partially surrounds the first channel includes the raised portion. The second piece includes another part of the wall of the first channel. The second piece includes a plurality of first holes arranged at intervals in the longitudinal direction of the first tube. The first tube also includes a plurality of first plates, and the plurality of first plates are arranged at intervals in the longitudinal direction of the first tube. The plurality of first plates divide the first cavity into a plurality of first sub-cavities. The third piece is fixedly connected to the second piece.

[0007] In some embodiments, a partial flow cross-sectional area of ​​the fifth sub-channel is smaller than a flow cross-sectional area of ​​other portions of the fifth sub-channel.

[0008] In some embodiments, the third member further includes a plurality of engaging portions, which are spaced apart along the length direction of the first tube, and the engaging portions abut against the first member.

[0009] In some embodiments, a plurality of first holes are provided on the second member in the length direction of the first tube, some of the first holes are communicated with the first sub-channel, and some of the first holes are communicated with the second sub-channel.

[0010] In some embodiments, the first tube further includes a fourth piece, the fourth piece extending along the length direction of the first tube, the fourth piece extending in the thickness direction of the first tube, the fourth piece including a plurality of slots, the slots being spaced apart along the length direction of the first tube, and at least a portion of the fourth piece being located within the first cavity.

[0011] In some embodiments, the first channel further includes a fourth sub-channel, and the fourth sub-channel connects the first sub-channel and the second sub-channel.

[0012] In some embodiments, the first tube further includes a plurality of fourth tubes, one end of each fourth tube being connected to the first channel, the other end of each fourth tube being connected to the first hole, and the fourth tube being connected to the first channel and the first sub-cavity.

[0013] In some embodiments, the first piece includes an annular tube, which includes a first sub-channel, a second sub-channel, a third sub-channel and a fourth sub-channel. A plurality of the fourth tubes are spaced apart in the length direction of the first tube, and one end of at least some of the fourth tubes is connected to the first sub-channel, and the other end of the fourth tubes is connected to the first hole.

[0014] In some embodiments, one end of another portion of the fourth tube is in communication with the second sub-channel, and the other end of the other portion of the fourth tube is in communication with the first hole.

[0015] In some embodiments, in at least one cross section of the first tube, a cross-sectional area of ​​the first sub-channel is greater than a cross-sectional area of ​​the second sub-channel.

[0016] In some embodiments, along the length direction of the first tube, the flow area of ​​the first sub-channel increases, and / or the cross-sectional area of ​​the second sub-channel decreases.

[0017] According to another aspect of the present application, a heat exchange system including any one of the above-described heat exchangers is provided, which naturally has the advantages of the above-described heat exchangers. The heat exchanger includes: a first tube and a second tube, the first tube and the second tube being spaced apart, the length direction of the first tube being parallel to the vertical direction or forming an angle with the vertical direction, the angle being not equal to 90 degrees, and in the vertical direction, the length of at least one of the first sub-cavities located above is smaller than the length of another of the first sub-cavities located below;

[0018] a heat exchange tube, wherein a plurality of the heat exchange tubes are spaced apart along the length direction of the first tube, the heat exchange tubes comprising a plurality of channels spaced apart along the length direction thereof, the plurality of channels spaced apart along the width direction of the heat exchange tube, the heat exchange tubes communicating with the first tube and the second tube;

[0019] The fins are connected to the heat exchange tubes, and some of the fins are located between two adjacent heat exchange tubes in the length direction of the first tube. There are multiple fins. According to the heat exchange system of the embodiment of the present application, the heat exchange efficiency of the heat exchange system can be effectively improved.

[0020] Other features and advantages of the embodiments of the present application will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the embodiments of the present application. The purposes and other advantages of the embodiments of the present application are achieved and obtained by the structures particularly pointed out in the description and drawings.

Brief Description of the Drawings

[0021] Figure 1 is a three-dimensional schematic diagram of a heat exchanger proposed according to an embodiment of the present application;

[0022] Figure 2 This is a schematic diagram of the assembly of the first tube of the heat exchanger proposed in an embodiment of the present application;

[0023] Figure 3 A cross-sectional view of a heat exchanger provided in an embodiment of the present application;

[0024] Figure 4 This is a schematic structural diagram of the first embodiment of the present application;

[0025] Figure 5Schematic diagram of the structure of a first tube of a heat exchanger according to a specific embodiment of the present application;

[0026] Figure 6 is a schematic structural diagram of a first tube of a heat exchanger according to another specific embodiment of the present application;

[0027] Figure 7 Schematic diagram of the structure of a first tube of a heat exchanger according to another specific embodiment of the present application;

[0028] Figure 8 Schematic diagram of the structure of a first tube of a heat exchanger according to another specific embodiment of the present application;

[0029] Figure 9 Schematic diagram of the structure of a first tube of a heat exchanger according to yet another specific embodiment of the present application;

[0030] Figure 10 is a schematic cross-sectional view of a heat exchanger according to another specific embodiment of the present application;

[0031] Figure 11 This is a structural diagram of another first embodiment proposed according to the present application;

[0032] Figure 12 This is a structural diagram of another first item proposed according to an embodiment of the present application.

[0033] Reference numerals:

[0034] 100. Heat exchanger; 1. First tube; 11. First channel; 111. First subchannel; 112. Second subchannel; 113. Third subchannel; 114. Fourth subchannel; 115. Fifth subchannel; 116. First opening; 12. First piece; 121. Protrusion; 122. Annular tube; 13. Second piece; 14. Third piece; 141. Joint; 15. First cavity; 151. First subcavity; 16. First hole; 17. First plate; 18. Fourth piece; 181. Slot; 2. Second tube; 3. Heat exchange tube; 4. Third tube; 5. Fourth tube; 6. Fin. [Specific implementation method]

[0035] In order to better understand the technical solution according to the present application, the embodiments according to the present application are described in detail below with reference to the accompanying drawings.

[0036] It should be understood that the embodiments described herein are only a portion of the embodiments of this application, not all of them. Based on the embodiments of this application, all other embodiments obtained by persons of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0037] The terms used in the embodiments of the present application are for the purpose of describing specific embodiments only and are not intended to limit the present application. The singular forms "a", "an", "the" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise.

[0038] It should be understood that the term "and / or" as used herein is merely a description of the relationship between associated objects, indicating that three possible relationships exist. For example, "A and / or B" can represent: A exists alone, A and B exist simultaneously, or B exists alone. Furthermore, the character " / " in this document generally indicates that the associated objects are in an "or" relationship.

[0039] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described based on the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it should be understood that when it is mentioned that an element is connected to another element "on" or "under", it can not only be directly connected to the other element "on" or "under", but also be indirectly connected to the other element "on" or "under" through an intermediate element.

[0040] The following describes a specific embodiment of the heat exchanger according to the structure of the embodiment of the present application.

[0041] According to the present application, a heat exchanger 100 is proposed, in which a first channel 11 is provided. After the refrigerant enters the first channel 11, it circulates in the first channel 11 and enters the heat exchange tube 3 along the first hole 16 and the first cavity 15. The above arrangement makes it possible to adjust the refrigerant distribution when entering the heat exchanger 100, thereby improving the heat exchange performance of the heat exchanger 100.

[0042] See also Figures 1 to 9 The heat exchanger 100 includes a first tube 1, a second tube 2 and a plurality of heat exchange tubes 3, wherein the plurality of heat exchange tubes 3 connect the first tube 1 and the second tube 2, and the heat exchange tubes 3 are directly or indirectly connected to the first tube 1, and the heat exchange tubes 3 are directly or indirectly connected to the second tube 2.

[0043] The first tube 1 includes: a first channel 11, a first piece 12, a second piece 13, a third piece 14, a first cavity 15 and a first hole 16. The first channel 11 includes a first sub-channel 111 and a second sub-channel 112. The first sub-channel 111 is arranged along the length direction of the first tube 1, and the second sub-channel 112 is arranged along the length direction of the first tube 1. The first sub-channel 111 and the second sub-channel 112 are spaced apart in the width direction of the first tube 1. The first channel 11 also includes a third sub-channel 113, and the third sub-channel 113 connects the first sub-channel 111 and the second sub-channel 112; the second piece 13 is located between the first piece 12 and the third piece 14 in the thickness direction of the first tube 1, and the third piece 14 is directly or indirectly connected to the heat exchange tube 3. ; The wall surrounding the first cavity 15 includes the second piece 13 and the third piece 14; the first cavity 15 includes a plurality of first sub-cavities 151, and the plurality of first sub-cavities 151 are arranged at intervals along the length direction of the first tube 1, and two adjacent first sub-cavities 151 in the length direction of the first tube 1 are not directly connected; the minimum length of at least one first sub-cavity 151 in the length direction of the first tube 1 is L1, and the minimum length of at least another first sub-cavity 151 in the length direction of the first tube 1 is L2, wherein L2 is greater than or equal to L1; a plurality of first holes 16 are provided, and the first holes 16 pass through the second piece 13, and at least one first hole 16 is connected to a first sub-cavity 151; the first channel 11 is connected to the first cavity 15 through a plurality of first holes 16.

[0044] The first tube 1 and the second tube 2 can also be called collecting tubes, and the heat exchange tube 3 can also be called a flat tube. When the first tube 1 and the second tube 2 are placed vertically, the third tube 4 is installed at the lower end of the first tube and / or the second tube. The refrigerant enters the inner cavity of the first tube 1 through the third tube 4 and flows into each heat exchange tube 3 respectively. The refrigerant flowing out of each heat exchange tube 3 enters the second tube 2. The first tube 1 and the second tube 2 are connected to an external circulation device, which transports the refrigerant in the second tube 2 to the first tube 1. In this way, the refrigerant circulates in the first tube of the heat exchanger 100.

[0045] When the heat exchanger 100 is in operation, the first tube 1 and the second tube 2 are usually arranged vertically, and the heat exchange tube 3 is usually arranged horizontally. Therefore, the refrigerant entering the first tube 1 is accumulated at the lower part of the inner cavity of the first tube 1 under the action of gravity, resulting in more refrigerant flowing through the heat exchange tube 3 at the lower end of the heat exchanger 100 and less refrigerant flowing through the heat exchange tube 3 at the upper end of the heat exchanger 100. In order to make the refrigerant more evenly distributed among the heat exchange tubes 3, please refer to Figure 2In the present invention, a first channel 11 is provided in the first tube 1. The first channel 11 includes a first sub-channel 111 provided along the length direction of the first tube 1, and a second sub-channel 112 provided along the length direction of the first tube 1. The first sub-channel 111 and the second sub-channel 112 are spaced apart in the width direction of the first tube 1. The first channel 11 also includes a third sub-channel 113, which connects the first sub-channel 111 and the second sub-channel 112. In some embodiments, the first channel 11 also includes a fourth sub-channel 114, which connects the first sub-channel 111 and the second sub-channel 112. In summary, the first sub-channel 111 , the second sub-channel 112, and the third sub-channel 113 are roughly surrounded to form a circulation connecting channel, or the first sub-channel 111, the second sub-channel 112, the third sub-channel 113 and the fourth sub-channel 114 are roughly surrounded to form a circulation connecting channel, and there is a part in the circulation connecting channel arranged along the length direction of the first tube 1. It should be noted that the first channel 11 can be composed of an internal hollow tube connection, or it can be formed by a structure in which the first piece 12 and the second piece 13 are combined. For example, a groove can be provided on the first piece 12, and the side of the first piece 12 with the groove is in contact with the second piece 13, then the groove is naturally closed to form the first channel 11.

[0046] The first tube 1 also includes a first piece 12, a second piece 13 and a third piece 14. A first cavity 15 is formed between the second piece 13 and the third piece 14. The first cavity 15 includes a plurality of first sub-cavities 151. The first sub-cavities 151 are isolated from each other. The first sub-cavities 151 can be connected to one or more heat exchange tubes 3. The second piece 13 is also provided with a plurality of first holes 16. The first holes 16 penetrate the second piece 13 along the thickness direction of the first tube 1. At least one first hole 16 is connected to a first sub-cavity 151. The first channel 11 is connected to the first cavity 15 through the plurality of first holes 16.

[0047] The minimum length of at least one first sub-cavity 151 in the length direction of the first tube 1 is L1, and the minimum length of at least another first sub-cavity 151 in the length direction of the first tube 1 is L2, wherein L2 is greater than or equal to L1, so in some embodiments, please refer to Figure 2 The minimum lengths of the multiple first sub-cavities 151 in the length direction of the first tube 1 are the same (i.e., L2 is equal to L1). This is beneficial to improving the production efficiency of the heat exchanger 100. Further, it is also helpful to adjust the refrigerant distribution and reduce the refrigerant gas-liquid separation phenomenon, thereby improving the heat exchange performance of the heat exchanger 100.

[0048] See also Figure 10In other embodiments, the minimum lengths of the multiple first sub-cavities 151 along the length direction of the first tube 1 are different (i.e., L2 is greater than L1). During operation, when the heat exchanger is placed vertically, the refrigerant flowing into the first tube is affected by the refrigerant pressure and flow rate, and the gas-liquid two-phase refrigerant is easily separated. Therefore, by increasing the internal volume of one or more first sub-cavities 151 in the first tube 1, first sub-cavities with different internal volumes are created in the first tube 1, which helps to adjust the refrigerant distribution, thereby improving the heat exchange efficiency of the heat exchanger 100. In summary, after the refrigerant enters the first channel 11, a portion of the refrigerant will flow into the heat exchange tube 3 along the first hole 16 and the first sub-cavity 151, and the other portion of the refrigerant will circulate along the first channel 11. The refrigerant supplied from the outside continuously flows into the first channel 11 and merges into the circulating refrigerant flow, and the refrigerant also continuously flows from each first hole 16 into each first sub-cavity 151, and finally flows into each heat exchange tube 3. The heat exchanger 100 helps to regulate the refrigerant distribution, thereby improving the heat exchange efficiency of the heat exchanger 100.

[0049] In some embodiments, the heat exchanger 100 further includes a third tube 4 , the first channel 11 further includes a fifth sub-channel 115 , the fifth sub-channel 115 is connected to the first sub-channel 111 , and the fifth sub-channel 115 includes a first opening 116 , which is connected to the third tube 4 .

[0050] See also Figure 2 The fifth sub-channel 115 is connected to the first sub-channel 111. The fifth sub-channel 115 can serve as an inlet to allow refrigerant to flow into the first channel 11. A first opening 116 is provided on the fifth sub-channel 115 and the third tube 4 is connected to the first opening 116. The third tube 4 is sealed and connected to the first piece 12. The sealed connection can be fixed by various methods such as welding and a clamping structure. The provision of the third tube 4 improves the convenience of connecting the first channel 11 to an external refrigerant supply device.

[0051] In some embodiments, the first piece 12 has a protrusion 121, which is arranged along the length direction of the first tube 1. The first piece 12 is fixedly connected to the second piece 13. A portion of the wall of the first channel 11 includes the protrusion 121. The second piece 13 includes another portion of the wall of the first channel 11. The second piece 13 includes a plurality of first holes 16 spaced apart in the length direction of the first tube 1. The first tube 1 also includes a plurality of first plates 17. The plurality of first plates 17 are spaced apart in the length direction of the first tube 1. The plurality of first plates 17 divide the first cavity 15 into a plurality of first sub-cavities 151. The third piece 14 is fixedly connected to the second piece 13.

[0052] See also Figure 2 and Figure 3The first piece 12 has a raised portion 121, which is arranged along the length direction of the first tube 1. The raised portion 121 can be formed by stamping the first piece 12, so that part of the material on the first piece 12 protrudes along the width direction of the first tube 1. The first piece 12 is fixedly connected to the second piece 13, and the connection method can be welding, bonding, etc. When the first piece 12 and the second piece 13 are connected, the first channel 11 is formed between the two, and a part of the side wall of the first channel 11 is formed by the wall surface of the raised portion 121 of the first piece 12, and the other part of the side wall of the first channel 11 is formed by the second piece 13.

[0053] The second piece 13 can be provided with a plurality of first holes 16 in the length direction of the first tube 1. The sizes of the first holes 16 can be the same or different. The sizes of the first holes 16 can be designed according to the actual working conditions. For example, in some embodiments, the cross-sectional area of ​​the first holes 16 arranged along the gravity direction on the second piece 13 can be gradually reduced. In this way, the cross-sectional area of ​​the first holes 16 near the upper end of the first tube 1 is larger than the cross-sectional area of ​​the first holes 16 near the lower end of the first tube 1, thereby increasing the refrigerant flow rate of the upper heat exchange tube 3, which is beneficial to reducing the problem that the refrigerant is accumulated in the heat exchange tube 3 below the heat exchanger 100 due to the influence of the resistance along the way and gravity. The heat exchanger helps to regulate the distribution of the refrigerant, which is beneficial to improving the heat exchange efficiency of the heat exchanger.

[0054] The second piece 13 includes a plurality of first holes 16 arranged at intervals in the longitudinal direction of the first tube 1. The number of the first holes 16 can match the number of the heat exchange tubes 3. The first holes 16 are arranged on the second plate, and the first holes 16 are arranged at intervals in the longitudinal direction of the first tube 1. In this way, each first hole 16 can be connected to a different first sub-cavity 151, or multiple first holes 16 can be connected to the same first sub-cavity 151.

[0055] The first tube 1 also includes a plurality of first plates 17, which are arranged at intervals along the length of the first tube 1. The plurality of first plates 17 divide the first cavity 15 into a plurality of first sub-cavities 151. The first plates 17 can be integrally formed with the second member 13 or the third member 14, or can be a component separately arranged in the first tube 1. The first plates 17 help adjust the refrigerant distribution in the first tube 1 by dividing the first tube 1 into a plurality of first sub-cavities, thereby helping to improve the heat exchange performance of the heat exchanger.

[0056] The third member 14 and the second member 13 can be fixedly connected by welding, bolt connection, clamping, etc.

[0057] In some embodiments, a flow cross-sectional area of ​​a portion of the fifth sub-channel 115 is smaller than a flow cross-sectional area of ​​other portions of the fifth sub-channel 115 .

[0058] See also Figure 4It can be understood that the partial flow cross-sectional area of ​​the fifth sub-channel 115 is smaller than the flow cross-sectional area of ​​other parts of the fifth sub-channel 115. The flow velocity of the part with a small flow cross-sectional area is fast, so that the pressure of this part is small, and a certain attraction can be generated in this part, so that the refrigerant in the first channel 11 can flow quickly into the part with a small flow cross-sectional area under the action of pressure.

[0059] In some embodiments, the third member 14 further includes a plurality of engaging portions 141 . The plurality of engaging portions 141 are spaced apart along the length direction of the first tube 1 , and the engaging portions 141 abut against the first member 12 .

[0060] See also Figure 5 When the first piece 12 and the third piece 14 are assembled, the joint 141 abuts against the first piece 12 , so that the relative position between the first piece 12 and the third piece 14 is fixed, thereby improving the structural strength of the first tube 1 in the heat exchanger 100 .

[0061] In some embodiments, a plurality of first holes 16 are provided on the second member 13 in the length direction of the first tube 1 , some of the first holes 16 are connected to the first sub-channel 111 , and some of the first holes 16 are connected to the second sub-channel 112 .

[0062] See also Figure 6 Because part of the first holes 16 is connected to the first sub-channel 111, and the other part of the first holes 16 is connected to the second sub-channel 112, the refrigerant flowing in the first channel 11 can flow into the first sub-cavity 151 along the first holes 16 when passing through the first sub-channel 111, and can flow into the first sub-cavity 151 along the first holes 16 when passing through the second sub-channel 112. Because the first sub-channel 111 and the second sub-channel 112 are both arranged along the length direction of the first tube 1, and the first sub-channel 111 and the second sub-channel 112 are spaced apart in the width direction of the first tube 1, the two first holes 16 connected to the same first sub-cavity 151 can be connected to the first sub-channel 111 and the second sub-channel 112 respectively. In this way, the refrigerant can flow to the first sub-cavity 151 whether in the first sub-channel 111 or the second sub-channel 112, which helps to regulate the refrigerant distribution, reduce the refrigerant gas-liquid separation phenomenon, and improve the heat exchange efficiency of the heat exchanger.

[0063] In some embodiments, the first tube 1 also includes a fourth piece 18, which extends along the length direction of the first tube and the thickness direction of the first tube. The fourth piece 18 includes a plurality of slots 181, and the slots 181 are spaced apart along the length direction of the first tube. At least part of the fourth piece 18 is located in the first cavity 15.

[0064] See also Figure 7The fourth piece 18 is provided with a plurality of slots 181. The fourth piece 18 is located between the second piece 13 and the third piece 14. The second piece 13, the third piece 14 and the fourth piece 18 are connected. The inner wall of the slot 181 and the second piece 13 and the third piece 14 together form the inner wall of the first sub-cavity 151. One slot 181 can be connected to one or more heat exchange tubes 3. In this example, the heat exchanger using the fourth piece 18 not only effectively improves the production efficiency of the heat exchanger, but also can help adjust the refrigerant distribution by adjusting the spacing between adjacent slots 181, which is beneficial to improving the heat exchange efficiency of the heat exchanger.

[0065] In some embodiments, the first tube 1 further includes a plurality of fourth tubes 5 , one end of the fourth tube 5 is connected to the first channel 11 , the other end of the fourth tube 5 is connected to the first hole 16 , and the fourth tube 5 is connected to the first channel 11 and the first sub-cavity 151 .

[0066] See also Figure 8 Utilizing multiple fourth tubes 5 to connect the first channel 11 and the first hole 16 helps to adjust the refrigerant distribution, reduce the refrigerant gas-liquid separation phenomenon, and improve the heat exchange efficiency of the heat exchanger.

[0067] In some embodiments, the first piece 12 includes an annular tube 122, the annular tube 122 includes a first sub-channel 111, a second sub-channel 112, a third sub-channel 113 and a fourth sub-channel 114, and multiple fourth tubes 5 are arranged at intervals in the length direction of the first tube 1, and one end of at least part of the fourth tubes 5 is connected to the first sub-channel 111, and the other end of the part of the fourth tubes 5 is connected to the first hole 16.

[0068] See also Figure 8 and Figure 9 In this embodiment, a complete annular pipe is used to form the first channel 11, which has better sealing and is not easy to leak. Using multiple fourth tubes 5 to connect the first channel 11 with the first hole 16 also helps to adjust the refrigerant distribution, reduce the refrigerant gas-liquid phenomenon, and improve the heat exchange performance of the heat exchanger.

[0069] In some embodiments, one end of another portion of the fourth tube 5 is communicated with the second sub-channel 112 , and the other end of the another portion of the fourth tube 5 is communicated with the first hole 16 .

[0070] See also Figure 9 In this embodiment, a portion of the fourth tube 5 is connected to the first sub-channel 111, and another portion of the fourth tube 5 is connected to the second sub-channel 112, and the end of the fourth tube 5 away from the first channel 11 is connected to the first hole 16. The above scheme can improve the distribution of the refrigerant, reduce the gas-liquid phenomenon of the refrigerant, and improve the heat exchange efficiency of the heat exchanger.

[0071] In some embodiments, in at least one cross section of the first tube, the cross-sectional area of ​​the first sub-channel 111 is greater than the cross-sectional area of ​​the second sub-channel 112 .

[0072] See also Figure 11 In this embodiment, the cross-sectional area of ​​the first sub-channel 111 can be larger than the cross-sectional area of ​​the second sub-channel 112, or the cross-sectional area of ​​the first sub-channel 111 can be smaller than the cross-sectional area of ​​the second sub-channel 112. This is beneficial for increasing the reflux velocity of the refrigerant, helping to adjust the distribution of the refrigerant, and helping to improve the heat exchange efficiency of the heat exchanger.

[0073] In some embodiments, along the length direction of the first tube, the flow area of ​​the first sub-channel 111 increases and / or the flow area of ​​the second sub-channel 112 decreases.

[0074] See also Figure 12 In this embodiment, the cross-sectional areas of the first and second sub-channels 111, 112 can be increased or decreased along the length of the first tube. Using this change in cross-sectional area to adjust the flow rate and velocity of the refrigerant within the first and second sub-channels 111, 112 also helps regulate refrigerant distribution and improve the heat exchange efficiency of the heat exchanger 100.

[0075] According to the present application, a heat exchange system is further provided, comprising any of the above-mentioned heat exchangers 100, the heat exchanger 100 comprising:

[0076] A first tube 1, a second tube 2, and a heat exchange tube 3, wherein the first tube 1 and the second tube 2 are spaced apart, the length direction of the first tube 1 is parallel to the vertical direction or forms an angle with the vertical direction, the angle being not equal to 90 degrees, and in the vertical direction, the length of at least one of the first sub-cavities located above is less than the length of another first sub-cavity located below, the plurality of heat exchange tubes 3 are spaced apart along the length direction of the first tube 1, the heat exchange tube 3 includes a plurality of channels spaced apart along the length direction thereof, the plurality of channels spaced apart in the width direction of the heat exchange tube 3, and the heat exchange tube 3 connects the first tube 1 and the second tube 2;

[0077] The heat exchanger 100 also includes fins, which include fins 6. Part of the fins 6 is located between two adjacent heat exchange tubes 3 along the length direction of the first tube 1. The part of the fins 6 is connected to the heat exchange tube 3. There are multiple fins 6. The heat exchanger is conducive to improving the uniformity of refrigerant distribution. The heat exchange system using the heat exchanger is conducive to improving the heat exchange performance of the heat exchange system.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A heat exchanger, characterized in that: The heat exchange tube comprises a first tube, a second tube and a plurality of heat exchange tubes, wherein the heat exchange tube is directly or indirectly connected to the first tube, and the heat exchange tube is directly or indirectly connected to the second tube, and the first tube comprises: a first channel, the first channel including a first sub-channel and a second sub-channel, the first sub-channel being arranged along the length direction of the first tube, the second sub-channel being arranged along the length direction of the first tube, the first sub-channel and the second sub-channel being spaced apart in the width direction of the first tube, the first channel further including a third sub-channel, the third sub-channel communicating with the first sub-channel; a first piece, a second piece, and a third piece, wherein the second piece is located between the first piece and the third piece in the thickness direction of the first tube, and the third piece is directly or indirectly connected to the heat exchange tube; a first cavity, wherein a wall surrounding the first cavity includes the second member and the third member; The first cavity includes a plurality of first sub-cavities, and the plurality of first sub-cavities are spaced apart along the length direction of the first tube, and two adjacent first sub-cavities in the length direction of the first tube are not directly connected; The minimum length of at least one of the first sub-cavities in the length direction of the first tube is L1, and the minimum length of at least another of the first sub-cavities in the length direction of the first tube is L2, wherein L2 is greater than or equal to L1; The second member includes a plurality of first holes, the first holes passing through the second member, and at least one of the first holes communicating with one of the first sub-cavities; The first sub-channel is in communication with the first cavity via the plurality of the first holes, and / or the second sub-channel is in communication with the first cavity via the plurality of the first holes.

2. The heat exchanger according to claim 1, characterized in that The first piece has a protrusion, which has a length in the length direction of the first tube. The first piece is fixedly connected to the second piece, and the third piece is fixedly connected to the second piece. The wall that partially surrounds the first channel includes the protrusion, and the second piece includes another part of the wall that surrounds the first channel.

3. The heat exchanger according to claim 1 or 2, characterized in that: The second member further includes a first plate, part of which is located in the first cavity. There are multiple first plates, which are spaced apart along the length of the first tube. The multiple first plates divide the first cavity into multiple first sub-cavities.

4. The heat exchanger according to claim 1 or 2, characterized in that The first tube also includes a fourth piece, the fourth piece has a length in the length direction of the first tube, the fourth piece has a thickness in the thickness direction of the first tube, the fourth piece includes a plurality of slots, the slots pass through the fourth piece, the slots are spaced apart along the length direction of the first tube, and part of the fourth piece is located in the first cavity.

5. The heat exchanger according to claim 1 or 2, characterized in that: The heat exchanger also includes a third tube, and the first channel also includes a fifth sub-channel, the fifth sub-channel is connected to the first sub-channel, the fifth sub-channel includes a first opening, the first opening is connected to the third tube, and a partial flow cross-sectional area of ​​the fifth sub-channel is smaller than the flow cross-sectional area of ​​other parts of the fifth sub-channel.

6. The heat exchanger according to claim 1 or 2, characterized in that: The first channel further includes a fourth sub-channel, and the fourth sub-channel connects the first sub-channel and the second sub-channel.

7. The heat exchanger according to claim 1, characterized in that The first tube further includes a plurality of fourth tubes, one end of each fourth tube is connected to the first channel, the other end of each fourth tube is connected to the first hole, and the fourth tube is connected to the first channel and the first cavity.

8. The heat exchanger according to claim 7, characterized in that The first piece includes an annular tube, which includes the first sub-channel, the second sub-channel, and the third sub-channel. The annular tube also includes a fourth sub-channel, the third sub-channel connects the first sub-channel and the second sub-channel, and the fourth sub-channel connects the first sub-channel and the second sub-channel. One end of a portion of the fourth tube is connected to the first sub-channel, and the other end of the portion of the fourth tube is connected to a portion of the first hole. One end of another portion of the fourth tube is connected to the second sub-channel, and the other end of the portion of the fourth tube is connected to another portion of the first hole.

9. The heat exchanger according to claim 1 or 2 or 7 or 8, characterized in that: In at least one cross section of the first tube, a cross-sectional area of ​​the first sub-channel is larger than a cross-sectional area of ​​the second sub-channel.

10. The heat exchanger according to claim 1 or 2 or 7 or 8, characterized in that: Along the length direction of the first tube, the flow area of ​​the first sub-channel increases and / or the flow area of ​​the second sub-channel decreases.

11. A heat exchange system, characterized in that: The heat exchanger according to any one of claims 1 to 10, comprising: a first tube and a second tube, wherein the first tube and the second tube are spaced apart from each other, a length direction of the first tube is parallel to a vertical direction or forms an angle with the vertical direction, the angle being not equal to 90 degrees, and in the vertical direction, a length of at least one of the first sub-cavities located above is smaller than a length of another first sub-cavity located below; a heat exchange tube, wherein a plurality of the heat exchange tubes are spaced apart along the length direction of the first tube, the heat exchange tubes comprising a plurality of channels extending along the length direction thereof, the plurality of channels being spaced apart along the width direction of the heat exchange tube, the heat exchange tubes being directly or indirectly connected to the first tube, and the heat exchange tubes being directly or indirectly connected to the second tube; Fins are connected to the heat exchange tubes, part of the fins are located between two adjacent heat exchange tubes in the length direction of the first tube, and there are multiple fins.

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