Parallel flow heat exchanger and heat exchange system

Abstract

A parallel flow heat exchanger and a heat exchange system, the parallel flow heat exchanger comprising: a first tube, the first tube comprising a first tube wall, the first tube having a first cavity, and the wall surrounding the first cavity comprising the first tube wall; a second tube, the second tube and the first tube are arranged in parallel; a heat exchange tube, the heat exchange tube comprising a microchannel heat exchange tube, the microchannel heat exchange tube is directly or indirectly connected to the first tube and the second tube respectively; a first piece, at least part of the first piece is located in the first cavity, the first piece comprises a second tube wall, the first piece has a second cavity, the wall surrounding the second cavity comprises the second tube wall, the second cavity extends along the length direction of the first tube, the second cavity comprises a first sub-cavity and a second sub-cavity, the first sub-cavity is indirectly connected to the first cavity, the second sub-cavity is directly connected to the first cavity, the first sub-cavity and the second sub-cavity are directly or indirectly connected, the flow length of the heat exchange medium in the first piece is lengthened, the flow length of the heat exchanger is increased, and it is beneficial to adjust the distribution of the heat exchange medium, thereby improving the performance of the heat exchanger.

Description

[Technical field]

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

[0002] Parallel flow heat exchangers are gradually being used in refrigeration systems such as automotive air conditioners and household air conditioners due to their high heat exchange efficiency, small size, and light weight. Collectors are provided at both ends of the microchannel flat tubes to distribute and collect the heat exchange medium.

[0003] In some applications, the refrigerant entering the parallel flow heat exchanger for heat exchange is in a two-phase flow state. The two-phase flow refrigerant is distributed in each microchannel flat tube and each microchannel of the flat tube, which will be unfavorable to the heat exchange performance. It is necessary to design a distribution component to adjust the distribution of the two-phase flow refrigerant to avoid the two-phase flow refrigerant directly entering the space of the collecting tube for distribution, which affects the performance of the heat exchanger. [Summary of the invention]

[0004] The present application provides a parallel flow heat exchanger and a heat exchange system having the parallel flow heat exchanger, which increases the flow length of the heat exchanger, is conducive to adjusting the distribution of the heat exchange medium, and thus improves the performance of the heat exchanger.

[0005] In a first aspect, an embodiment of the present application provides a parallel flow heat exchanger, comprising: a first tube, the first tube comprising a first tube wall, the first tube having a first cavity, and the wall surrounding the first cavity comprising the first tube wall; a second tube, the second tube being arranged in parallel with the first tube; a heat exchange tube, the heat exchange tube comprising a microchannel heat exchange tube, the microchannel heat exchange tube being directly or indirectly connected to the first tube, and the microchannel heat exchange tube being directly or indirectly connected to the second tube; a first piece, at least a portion of the first piece being located in the first cavity, the first piece comprising a second tube wall, the first piece having a second cavity, the wall surrounding the second cavity comprising the second tube wall, the second cavity extending along the length direction of the first tube, the second cavity comprising a first sub-cavity and a second sub-cavity, the first sub-cavity being indirectly connected to the first cavity, the second sub-cavity being directly connected to the first cavity, and the first sub-cavity being directly or indirectly connected to the second sub-cavity.

[0006] In the parallel flow heat exchanger provided in the embodiment of the present application, since the first sub-chamber and the first chamber are not directly connected, the second sub-chamber and the first chamber are directly connected, and the first sub-chamber and the second sub-chamber are directly or indirectly connected, when it is necessary to inject heat exchange medium into the parallel flow heat exchanger, the heat exchange medium first flows into the first sub-chamber, then flows into the second sub-chamber due to the pressure difference, and finally flows into the first chamber. By dividing the second chamber in the first piece into multiple sub-chambers, the flow length of the heat exchange medium in the first piece is lengthened, so that the heat exchange medium is evenly distributed along the length direction of the first piece before flowing into the first chamber, which is beneficial to the distribution of the heat exchange medium in the heat exchange tube; at the same time, since the flow length of the heat exchange medium in the first piece is lengthened, the heat exchange medium can also be fully mixed during the flow in the second chamber, thereby making the temperature distribution of the heat exchange medium along the length direction of the first piece uniform, thereby improving the heat exchange efficiency of the parallel flow heat exchanger.

[0007] In combination with the first aspect, in some embodiments, the first piece includes a first channel and a second channel, the first channel connects the first sub-cavity and the second sub-cavity, the second channel connects the first cavity and the second sub-cavity, at least part of the first channel and at least part of the second channel extend along the length direction of the first tube; in a first plane perpendicular to the length direction of the first tube, the projection of the second tube wall includes at least part of a spiral line, and the projection of the second sub-cavity includes a plurality of circular rings. Such a structural design enables the heat exchange medium to flow along the spiral line in the second sub-cavity, thereby lengthening the flow length of the heat exchange medium in the first piece, and at the same time enables the first piece to present a cylindrical structure formed by winding, without the need to provide additional through holes or through grooves, thereby improving production efficiency.

[0008] In combination with the first aspect, in some embodiments, the second tube wall includes a first sub-wall and a second sub-wall, the first sub-wall and the second sub-wall extend in the length direction of the first tube, and the first sub-wall and the second sub-wall have thickness; the first sub-wall includes one or more first through holes, the first through holes penetrate the first sub-wall, and the first through holes connect the first sub-cavity and the second sub-cavity; the second sub-wall includes a plurality of second through holes, the second through holes penetrate the second sub-wall, at least some of the second through holes connect the second sub-cavity and the first cavity, and the first through holes are indirectly connected to the second through holes; in a first plane perpendicular to the length direction of the first tube, the projection of the first sub-wall includes a first arc, the projection of the second sub-wall includes one or more second arcs, and the circumference of at least one second arc is greater than the circumference of the first arc. Such a structural design makes the first piece present a multi-layer sleeve structure, simplifies the production process of the first piece, and the second sub-cavity is divided into a plurality of sub-chambers, thereby lengthening the flow length of the heat exchange medium in the first piece.

[0009] In combination with the first aspect, in some embodiments, in the first plane, the projection center of at least one first through hole and the projection center of at least one second through hole are collinear. Such a structural design allows the heat exchange medium that flows out of the first through hole and is dispersed into two streams to flow through the same length of the flow path respectively, and then converge to the second through hole at the same time, further ensuring that the heat exchange medium is evenly distributed along the length direction of the first member before flowing into the first cavity through the second through hole.

[0010] In combination with the first aspect, in some embodiments, in the first plane, the projection of the second sub-wall includes at least three second arcs, the second arcs include one or more radii, at least one radius of one second arc is different from at least one radius of another second arc; in the radial direction of the first tube, the maximum difference in radius values ​​between two adjacent second arcs is inversely proportional to the distance from any one of the second arcs to the first arc. Such a structural design is more suitable for the state change of the heat exchange medium during the flow process, which is conducive to improving the heat exchange performance.

[0011] In combination with the first aspect, in some embodiments, the number of first through holes in the first sub-wall is less than the number of second through holes in the second sub-wall; and / or the sum of the flow areas of the first through holes is less than the sum of the flow areas of the second through holes. Such a structural design can accelerate the flow of the heat exchange medium out of the second sub-cavity from the second through holes when the heat exchange medium flows into the first cavity, thereby avoiding the accumulation of the heat exchange medium in the first part, thereby reducing the filling amount of the heat exchange medium, and also helps to reduce the difference in heat exchange medium distribution on multiple heat exchange tubes located between two adjacent second through holes.

[0012] In combination with the first aspect, in some embodiments, in the first plane, the projection of the second sub-wall includes a second arc, the second arc includes the projection of multiple second through holes, and the number of the second through holes is greater than the number of the first through holes. Such a structural design enables the first piece to present an inner and outer two-layer casing structure, and the heat exchange medium flows into the first cavity through the first sub-cavity, the first through hole, the second sub-cavity and the second through hole in sequence, which is conducive to ensuring that the heat exchange medium is evenly distributed along the length direction of the first piece before being distributed to each heat exchange tube, thereby reducing the difference in heat exchange medium distribution on multiple heat exchange tubes.

[0013] In combination with the first aspect, in some embodiments, in the first plane, the projection of the second sub-wall includes two second arcs, wherein in the radial direction of the first tube, a second arc close to the first arc includes the projection of multiple second through holes, and the number of second through holes is greater than the number of first through holes, and another second arc away from the first arc includes the projection of at least one long groove. Such a structural design makes the first piece present an inner and outer three-layer sleeve structure. Since the second arc away from the first arc includes the projection of at least one long groove, that is, the outermost wall of the second sub-wall is provided with a long groove, it is beneficial to reduce the resistance of the heat exchange medium during the flow process, reduce the impact on the pressure on the heat exchange medium side, and improve the heat exchange performance; at the same time, since the flow area of ​​the long groove is large, it is also beneficial to reduce the difference in heat exchange medium distribution on multiple heat exchange tubes.

[0014] In combination with the first aspect, in some embodiments, the ratio of the number of the first through holes to the number of the second through holes is less than or equal to 1 / 2. Such a structural design allows the heat exchange medium to be evenly distributed along the length direction of the first member and then flow into the first tube, while also helping to reduce the difference in heat exchange medium distribution on each heat exchange tube.

[0015] In a second aspect, an embodiment of the present application provides a parallel flow heat exchanger, comprising: a heat exchange tube, the heat exchange tube having a plurality of channels extending along its length direction; a first component, the first component being directly or indirectly connected to the heat exchange tube, the first component comprising a first tube wall, the first component having a first cavity, the wall surrounding the first cavity comprising the first tube wall, the first component further comprising a first plate and a second plate, the first plate and the second plate extending along the length direction of the first component, at least part of the first plate and at least part of the second plate being located in the first cavity, the first plate and the second plate being arranged along the width direction or the height direction of the first component, the first plate being connected to the inner wall of the first tube wall, the second plate being connected to the inner wall of the first tube wall, the first cavity comprising a first sub-cavity, a second sub-cavity and a third sub-cavity, the third sub-cavity being directly connected to the plurality of channels of the heat exchange tube; the first plate comprising a first channel, the second plate comprising a second channel, the first channel connecting the first sub-cavity and the second sub-cavity, the second channel connecting the second sub-cavity and the third sub-cavity, and the first channel being indirectly connected to the second channel.

[0016] In the parallel flow heat exchanger provided in the embodiment of the present application, since the first component includes a first plate and a second plate located in the first cavity, the first plate and the second plate can divide the first cavity into a first sub-cavity, a second sub-cavity and a third sub-cavity. When it is necessary to inject heat exchange medium into the parallel flow heat exchanger, the heat exchange medium first flows into the first sub-cavity, and then flows from the first channel into the second sub-cavity and from the second channel into the third sub-cavity due to the pressure difference, and finally flows into the multiple channels of the heat exchange tube, thereby lengthening the flow length of the heat exchange medium in the first component, so that the heat exchange medium is evenly distributed along the length direction of the first component before flowing into the multiple channels of the heat exchange tube, which is beneficial to the distribution of the heat exchange medium in the heat exchange tube; at the same time, since the flow length of the heat exchange medium in the first component is lengthened, the heat exchange medium can also be fully mixed during the flow in the first cavity, thereby making the temperature distribution of the heat exchange medium along the length direction of the first component uniform, thereby improving the heat exchange efficiency of the parallel flow heat exchanger.

[0017] In combination with the second aspect, in some embodiments, the sum of the flow areas of the first channels is smaller than the sum of the flow areas of the second channels. Such a structural design can accelerate the heat exchange medium in the second sub-cavity to flow from the second channel into the third sub-cavity, and finally flow into the multiple channels of the heat exchange tube, thereby avoiding the accumulation of the heat exchange medium in the first component, and further reducing the filling amount of the heat exchange medium.

[0018] In conjunction with the second aspect, in some embodiments, the first channel includes a through hole or a long slot; and / or the second channel includes a through hole or a long slot. Such a structural design is conducive to simplifying the structure of the first channel and / or the second channel, reducing the difficulty of the production process, thereby improving production efficiency.

[0019] In a third aspect, an embodiment of the present application provides a heat exchange system, including a compressor, a throttling assembly and a heat exchanger, wherein the heat exchanger includes a parallel flow heat exchanger as described in any one of the above items.

[0020] Since the first part or the first component of the parallel flow heat exchanger can lengthen the flow length of the heat exchange medium, the heat exchange medium is evenly distributed along the length direction of the first part or the first component. Therefore, the heat exchange system using the parallel flow heat exchanger can reduce the distribution difference of the heat exchange medium on multiple heat exchange tubes and improve the heat exchange efficiency of the heat exchange system.

[0021] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application.

Brief Description of the Drawings

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0023] Figure 1 A schematic diagram of the structure of a parallel flow heat exchanger provided in an embodiment of the present application.

[0024] Figure 2 for Figure 1 A schematic structural diagram of a first member and a first tube in a parallel flow heat exchanger is shown.

[0025] Figure 3 for Figure 1 A cross-sectional view of the first member and the first tube in the parallel flow heat exchanger along line AA is shown.

[0026] Figure 4 for Figure 3 A schematic diagram of the structure of the first component of the parallel flow heat exchanger shown.

[0027] Figure 5 for Figure 1 A schematic structural diagram of another first member and a first tube in a parallel flow heat exchanger is shown.

[0028] Figure 6 for Figure 1 Another cross-sectional view of the first member and the first tube along line AA in the parallel flow heat exchanger is shown.

[0029] Figure 7 for Figure 6 A schematic diagram of the structure of the first part of the parallel flow heat exchanger shown.

[0030] Figure 8 for Figure 6 Another schematic diagram of the structure of the first part of the parallel flow heat exchanger shown.

[0031] Fig. 9 for Figure 6 Another schematic structural diagram of the first component of the parallel flow heat exchanger shown.

[0032] Fig.10 for Figure 6 Another structural schematic diagram of the first part of the parallel flow heat exchanger shown.

[0033] Fig.11 for Figure 1 A schematic structural diagram of another first member and a first tube in a parallel flow heat exchanger is shown.

[0034] Fig.12 for Figure 1 A schematic diagram of the structure of another first member and a first tube in a parallel flow heat exchanger is shown.

[0035] Fig.13 for Figure 1 A schematic structural diagram of another first member and a first tube in a parallel flow heat exchanger is shown.

[0036] Fig.14 Another schematic diagram of the structure of the parallel flow heat exchanger provided in an embodiment of the present application.

[0037] Fig.15 for Fig.14 A cross-sectional view of the first component of the parallel flow heat exchanger along line BB is shown.

[0038] Fig.16 for Fig.14 Another cross-sectional view of the first component of the parallel flow heat exchanger along line BB is shown.

[0039] Fig.17 for Fig.14 Another cross-sectional view of the first component of the parallel flow heat exchanger along line BB is shown.

[0040] Fig.18 for Fig.17 A schematic structural diagram of a first channel provided on a first plate in a parallel flow heat exchanger is shown.

[0041] Fig.19 for Fig.17 Another schematic diagram of the structure of the first channel provided on the first plate in the parallel flow heat exchanger shown. [Specific implementation method]

[0042] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0043] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0044] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" 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 other meanings.

[0045] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0046] Existing parallel flow heat exchangers generally include microchannel flat tubes, heat dissipation fins and headers. Headers are provided at both ends of the microchannel flat tubes to distribute and collect heat exchange medium. Corrugated or louvered heat dissipation fins are provided between two adjacent microchannel flat tubes to enhance the heat exchange efficiency between the heat exchanger and the air side.

[0047] In some applications, the refrigerant entering the parallel flow heat exchanger for heat exchange is usually in a two-phase flow state. The two-phase flow refrigerant is distributed in each microchannel flat tube and each microchannel in the flat tube, which will be unfavorable to the heat exchange performance. It is necessary to design a distribution component to adjust the distribution of the two-phase flow refrigerant to avoid the two-phase flow refrigerant directly entering the space of the collecting tube for distribution, which affects the performance of the heat exchanger.

[0048] In order to ensure that the refrigerant is evenly distributed in each microchannel flat tube, a metal flow guide pipe is usually inserted into the manifold as a distribution component. The outer peripheral wall of the distribution component is provided with through holes or through grooves spaced along its length direction, and the refrigerant can be evenly distributed to each microchannel flat tube through these through holes or through grooves for recirculation. However, the size, number and position of the through holes or through grooves opened on the outer peripheral wall of the existing distribution component will be tested and adjusted according to the different size specifications of the parallel flow heat exchanger, thereby increasing the difficulty of producing the distribution pipe and increasing the economic and time costs.

[0049] On the first aspect, the embodiments of the present application provide a parallel flow heat exchanger, which increases the flow length of the heat exchanger, is conducive to adjusting the distribution of the heat exchange medium, and thus improves the performance of the heat exchanger.

[0050] Please refer to Figures 1 to 6, the parallel flow heat exchanger 100 includes a first tube 1, a second tube 5, a heat exchange tube and a first member 2. The first tube 1 includes a first tube wall 11, the first tube 1 has a first cavity 12, and the wall surrounding the first cavity 12 includes the first tube wall 11; the second tube 5 is arranged in parallel with the first tube 1, and the structure of the second tube 5 and the first tube 1 can be the same or different; the heat exchange tube includes one or more microchannel heat exchange tubes 3, the microchannel heat exchange tube 3 is directly or indirectly connected to the first tube 1, and the microchannel heat exchange tube 3 is directly or indirectly connected to the second tube 5; at least part of the first member 2 is located in the first cavity 12, the first member 2 includes a second tube wall 21, the first member 2 has a second cavity 22, and the wall surrounding the second cavity 22 includes the second tube wall 21. Direct connection means that one tube is connected to another tube without an intermediate tube, that is, there is no intermediate tube between the two, and indirect connection means that one tube is connected to another tube through an intermediate tube, that is, there is an intermediate tube between and connected to the two.

[0051] The second cavity 22 extends along the length direction of the first tube 1, and the second cavity 22 includes a first sub-cavity 221 and a second sub-cavity 222. The first sub-cavity 221 is indirectly connected to the first cavity 12, the second sub-cavity 222 is directly connected to the first cavity 12, and the first sub-cavity 221 and the second sub-cavity 222 are directly or indirectly connected. Direct connection means that liquid or gas flows out of the outlet of one cavity and then directly flows into another cavity; indirect connection means that liquid or gas flows out of the outlet of one cavity and then flows through other cavities or pipelines and other structures before flowing into another cavity.

[0052] The parallel flow heat exchanger 100 further includes an inlet and outlet pipe 6. The inlet and outlet pipe 6 is directly or indirectly connected to the first pipe 1; and / or the inlet and outlet pipe 6 is directly or indirectly connected to the second pipe 5. The inlet and outlet pipe 6 has an inlet and outlet channel that is directly or indirectly connected to the first sub-cavity 221.

[0053] The inlet and outlet pipes 6 are used to inject heat exchange medium into the parallel flow heat exchanger 100. When heat exchange medium needs to be injected into the parallel flow heat exchanger 100, the heat exchange medium passes through the inlet and outlet channels, the first sub-cavity 221, the second sub-cavity 222, the first cavity 12 and multiple channels on the microchannel heat exchange tube 3 in sequence, thereby realizing heat exchange between the heat exchange medium and the external medium (such as air).

[0054] By dividing the second chamber 22 in the first member 2 into the first sub-chamber 221 and the second sub-chamber 222, the flow length of the heat exchange medium in the first member 2 is lengthened, so that the heat exchange medium is evenly distributed along the length direction of the first member 2 before flowing into the first chamber 12, which is beneficial to the distribution of the heat exchange medium in the heat exchange tube; at the same time, since the flow length of the heat exchange medium in the first member 2 is lengthened, the heat exchange medium can be fully mixed during the flow in the second chamber 22, thereby making the temperature distribution of the heat exchange medium along the length direction of the first member 2 uniform, thereby improving the heat exchange efficiency of the parallel flow heat exchanger 100. In addition, compared with the existing distribution component having a through hole or through groove on its outer peripheral wall, the production difficulty of the existing distribution component can be effectively reduced, and the economic and time costs are reduced.

[0055] Please continue to refer to Figures 2 to 4 In some embodiments, the first member 2 includes a first channel 23 and a second channel 24, the first channel 23 connects the first sub-cavity 221 and the second sub-cavity 222, the second channel 24 connects the first cavity 12 and the second sub-cavity 222, and at least part of the first channel 23 and at least part of the second channel 24 extend along the length direction of the first tube 1 (i.e., the first direction D1). In a first plane perpendicular to the length direction of the first tube 1 (i.e., the first direction D1), the projection of the second tube wall 21 includes at least part of a spiral line, and the projection of the second sub-cavity 222 includes a plurality of circular rings. The heat exchange medium can flow along the spiral line in the second sub-cavity 222, thereby lengthening the flow length of the heat exchange medium in the first member 2. The more spiral turns the spiral line has, the more evenly the heat exchange medium is distributed along the length direction of the first member 2.

[0056] Specifically, the first member 2 can be a hollow cylindrical structure formed by winding a plate in a circumferential direction, without the need for additional through holes or through grooves, thereby improving production efficiency. The hollow passage in the middle of the hollow cylindrical structure forms a first sub-cavity 221, and a spiral gap around the axis of the hollow cylindrical structure forms a second sub-cavity 222, and the first sub-cavity 221 and the second sub-cavity 222 are directly connected.

[0057] Please continue to refer to Figure 5 and Figure 6In some embodiments, the second tube wall 21 includes a first sub-wall 211 and a second sub-wall 212, the first sub-wall 211 and the second sub-wall 212 extend in the length direction of the first tube 1, and the first sub-wall 211 and the second sub-wall 212 have a thickness. The first sub-wall 211 has a first channel 25, and the first channel 25 connects the first sub-cavity 221 and the second sub-cavity 222. The second sub-wall 212 has a second channel 26, and the second channel 26 connects the second sub-cavity 222 and the first cavity 12. In a first plane perpendicular to the length direction of the first tube 1, the projection of the first sub-wall 211 includes a first arc, and the projection of the second sub-wall 212 includes a plurality of second arcs, the circumference of at least one second arc is greater than the circumference of the first arc, and any second arc includes the projection of at least one second channel 26.

[0058] Specifically, the second sub-wall 212 is sleeved on the outer periphery of the first sub-wall 211 along the radial direction thereof, and the second sub-wall 212 includes a plurality of third sub-walls 2121 spaced apart along the radial direction of the first member 2, and a second channel is provided on any third sub-wall 2121. In the radial direction of the first member 2, the third sub-wall 2121 located at the outermost side (i.e., the third sub-wall 2121 closest to the first sub-wall 211) surrounds and forms the second sub-cavity 222, and the remaining third sub-walls 2121 surround and form the third sub-cavities 223, respectively, and the first sub-cavity 221 is connected with the second sub-cavity 222 through one or more third sub-cavities 223. The heat exchange medium flows through the first sub-cavity 221, the third sub-cavity 223, the second sub-cavity 222 and the first cavity 12 in sequence, thereby lengthening the flow length of the heat exchange medium in the first member 2.

[0059] The number of the third sub-walls 2121 may be one, two, three or any other number. The more the number of the third sub-walls 2121 is, the more uniformly the heat exchange medium is distributed along the length direction of the first member 2. This is not limited here. For example, the number of the third sub-walls 2121 may be one, and the first sub-cavity 221 is directly connected to the second sub-cavity 222; the number of the third sub-walls 2121 may be two, and the first sub-cavity 221 is connected to the second sub-cavity 222 through one third sub-cavity 223; the number of the third sub-walls 2121 may be three, and the first sub-cavity 221 may be connected to the second sub-cavity 222 through two third sub-cavities 223 in sequence.

[0060] It is understandable that the first piece 2 can present a multi-layer sleeve structure, so that the second sub-cavity 222 is divided into a plurality of sub-chambers, which simplifies the production process of the first piece 2.

[0061] In the first plane, the projection of the second sub-wall 212 includes at least three second arcs, the second arcs include one or more radii, at least one radius of one second arc is different from at least one radius of another second arc. In the radial direction of the first tube 1, the maximum difference in radius values ​​between any two adjacent second arcs is inversely proportional to the distance from any second arc to the first arc.

[0062] Specifically, the second arc can be a regular arc, that is, the third sub-wall 2121 surrounds to form a circular tubular structure; the second arc can also include multiple arc segments with different radii, that is, the third sub-wall 2121 surrounds to form an irregular tubular structure. In the radial direction of the first member 2 away from the first sub-wall 211, the maximum width of the gap formed between two adjacent third sub-walls 2121 is inversely proportional to the distance from the third sub-wall 2121 located on the inner side or the third sub-wall 2121 located on the outer side to the first sub-wall 211. In this way, the first member 2 is more adaptable to the state changes of the heat exchange medium during the flow process, which is conducive to improving the heat exchange performance.

[0063] It is understandable that the maximum difference in radius values ​​between any two adjacent second arcs may not be proportional to the distance from any one of the second arcs to the first arc, as long as the maximum difference in radius values ​​between any two adjacent second arcs gradually decreases in the radial direction away from the first sub-wall 211 along the first piece 2.

[0064] Please refer to Figures 7 to 9 In some embodiments, the first channel 25 and / or the second channel 26 may include a plurality of through holes arranged at intervals.

[0065] Specifically, the first sub-wall 211 includes one or more first through holes 251, which penetrate the first sub-wall 211 and communicate with the first sub-cavity 221 and the second sub-cavity 222. The second sub-wall 212 includes a plurality of second through holes, which penetrate the second sub-wall 212, at least some of which communicate with the second sub-cavity 222 and the first cavity 12, and the first through holes 251 are indirectly connected with the second through holes.

[0066] Please continue to refer to Figure 7 In some embodiments, the first channel 25 includes a plurality of first through holes 251 spaced apart on the first sub-wall 211 along the length direction (first direction D1) of the first member 2.

[0067] Please continue to refer to Figure 8In some embodiments, the first channel 25 includes at least two rows of through hole groups arranged in parallel, and any row of through hole groups includes a plurality of first through holes 251 arranged on the first sub-wall 211 at intervals along the length direction (first direction D1) of the first member 2. The aperture sizes of the first through holes 251 in two adjacent rows of through hole groups may be the same or different, which is not limited here.

[0068] Please continue to refer to Fig. 9 In some embodiments, the first channel 25 includes a plurality of first through holes 251 spirally arranged on the first sub-wall 211 along the axis L of the first member 2. The axis L extends along the length direction (first direction D1) of the first member 2.

[0069] Similarly, the second channel 26 also includes a plurality of second through holes spaced apart on the second sub-wall 212 along the length direction (first direction D1) of the first piece 2; or, the second channel 26 also includes at least two rows of through hole groups arranged in parallel, and any one row of through hole groups includes a plurality of second through holes spaced apart on the second sub-wall 212 along the length direction (first direction D1) of the first piece 2; or, the second channel 26 also includes a plurality of second through holes spirally arranged on the second sub-wall 212 along the axis L of the first piece 2.

[0070] In the first plane, a projection center of at least one first through hole 251 and a projection center of at least one second through hole are collinear.

[0071] Specifically, the second through hole on the innermost third sub-wall 2121 is arranged at an angle of 180° to the first through hole 251 on the first sub-wall 211, and the second through holes on two adjacent third sub-walls 2121 are also arranged at an angle of 180°. In this way, the heat exchange medium that flows out of the first through hole 251 and is dispersed into two streams flows through the same length of the flow path respectively, and then converges to the second through hole at the same time, further ensuring that the heat exchange medium is evenly distributed along the length direction of the first member 2 before flowing into the first cavity 12 through the second through hole.

[0072] The number of the first through holes 251 of the first sub-wall 211 is smaller than the number of the second through holes of the second sub-wall 212; and / or the sum of the flow areas of the first through holes 251 is smaller than the sum of the flow areas of the second through holes.

[0073] Specifically, the number of the first through holes 251 opened on the first sub-wall 211 is smaller than the number of the second through holes opened on the innermost third sub-wall 2121, and in the direction radially away from the first sub-wall 211 of the first piece 2, the number of the second through holes opened on the inner third sub-wall 2121 is smaller than the number of the second through holes opened on the outer third sub-wall 2121; or, the sum of the flow areas of the first through holes 251 opened on the first sub-wall 211 is smaller than the sum of the flow areas of the second through holes opened on the innermost third sub-wall 2121, and in the direction radially away from the first sub-wall 211 of the first piece 2, the sum of the flow areas of the second through holes opened on the inner third sub-wall 2121 is smaller than the sum of the flow areas of the second through holes opened on the outer third sub-wall 2121. In this way, when the heat exchange medium flows into the first cavity 12 from the second through hole, it can not only accelerate the flow of the heat exchange medium out of the second sub-cavity 222 from the second through hole, thereby avoiding the accumulation of the heat exchange medium in the first part 2, thereby reducing the filling amount of the heat exchange medium, but also help to reduce the difference in heat exchange medium distribution on multiple heat exchange tubes located between two adjacent second through holes.

[0074] Please refer to Fig.10 In some embodiments, the first channel 25 and / or the second channel 26 can also be a long groove arranged along the length direction (first direction D1) of the first piece 2, thereby replacing the first through hole 251 or the second through hole, which can simplify the production process of the first piece 2 and thus improve production efficiency.

[0075] The flow area of ​​the first long groove 252 opened on the first sub-wall 211 is smaller than the flow area of ​​the second long groove opened on the innermost third sub-wall 2121, and the flow area of ​​the second long groove opened on the inner third sub-wall 2121 is smaller than the flow area of ​​the second long groove opened on the outer third sub-wall 2121 in the radial direction away from the first member 2. In this way, when the heat exchange medium flows into the first cavity 12 from the second channel 26, the heat exchange medium can be accelerated to flow out of the second sub-cavity 222 from the second channel 26, thereby avoiding the accumulation of the heat exchange medium in the first member 2, and further reducing the filling amount of the heat exchange medium.

[0076] It can be understood that the first channel 25 opened on the first sub-wall 211 can be a first long groove 252, and the second channel 26 opened on part or all of the third sub-wall 2121 can also be a second long groove; or, the first channel 25 opened on the first sub-wall 211 can be a first long groove 252, and the second channel 26 opened on part or all of the third sub-wall 2121 can be a plurality of second through holes; or, the first channel 25 opened on the first sub-wall 211 can be a plurality of first through holes 251, and the second channel 26 opened on part or all of the third sub-wall 2121 can be a second long groove; or, the first channel 25 opened on the first sub-wall 211 can be a plurality of first through holes 251, and the second channel 26 opened on part or all of the third sub-wall 2121 can be a second through hole.

[0077] Please refer to Fig.11 In some embodiments, within the first plane, the projection of the second sub-wall 212 includes a second arc, the second arc includes projections of a plurality of second through holes 261 , and the number of the second through holes 261 is greater than the number of the first through holes 251 .

[0078] Specifically, the second sub-wall 212 is sleeved on the outer periphery of the first sub-wall 211 along its radial direction, so that the first piece 2 presents an inner and outer two-layer sleeve structure, which is beneficial to ensure that the heat exchange medium is evenly distributed along the length direction of the first piece 2 and then distributed to each heat exchange tube 3, thereby reducing the difference in heat exchange medium distribution on multiple heat exchange tubes 3.

[0079] The ratio of the number of the first through holes 251 to the number of the second through holes 261 is less than or equal to 1 / 2. This allows the heat exchange medium to be evenly distributed along the length direction of the first member 2 and then flow into the first tube 1, while also helping to reduce the difference in heat exchange medium distribution on each heat exchange tube 3.

[0080] Specifically, the ratio of the number of the first through holes 251 to the number of the second through holes 261 can be 1 / 2, 1 / 3, 1 / 4, 1 / 5 or any other value, as long as the number of the second through holes 261 is greater than the number of the first through holes 251, and is not limited here. In the embodiment of the present application, the ratio of the number of the first through holes 251 to the number of the second through holes 261 can be 1 / 2.

[0081] Please refer to Fig.12 and Fig.13 In some embodiments, within the first plane, the projection of the second sub-wall 212 includes two second arcs, wherein, in the radial direction of the first tube 1, a second arc close to the first arc includes the projection of multiple second through holes (not shown in the figure), and the number of the second through holes is greater than the number of the first through holes 251, and another second arc away from the first arc includes the projection of at least one long groove 262.

[0082] Specifically, the second sub-wall 212 is sleeved on the outer periphery of the first sub-wall 211 along its radial direction, and the second sub-wall 212 includes two third sub-walls 2121 distributed at radial intervals along the first piece 2, so that the first piece 2 presents an inner and outer three-layer sleeve structure, wherein a plurality of second through holes are provided on the innermost third sub-wall 2121, and at least one long groove 262 is provided on the outermost third sub-wall.

[0083] The second through hole opened on the innermost third sub-wall 2121 and the first through hole 251 opened on the first sub-wall 211 are not only conducive to ensuring that the heat exchange medium is evenly distributed along the length direction of the first member 2 before being distributed to each heat exchange tube 3, but also conducive to mixing of the gas-liquid two-phase heat exchange medium, thereby further improving the uniformity of distribution of the heat exchange medium in the multiple heat exchange tubes 3. The ratio of the number of the first through holes 251 to the number of the second through holes is the same as that in the aforementioned embodiment, and will not be repeated here.

[0084] In addition, a long groove 262 is opened on the outermost third sub-wall 2121, which is beneficial to reduce the resistance of the heat exchange medium during the flow process, reduce the impact on the pressure on the heat exchange medium side, and improve the heat exchange performance; at the same time, since the flow area of ​​the long groove 262 is large, it is also beneficial to reduce the difference in heat exchange medium distribution on multiple heat exchange tubes 3.

[0085] On the second aspect, the embodiments of the present application also provide another parallel flow heat exchanger, which can also effectively reduce the production difficulty of the distribution pipes provided in the existing parallel flow heat exchanger to reduce economic and time costs.

[0086] Please refer to Figures 14 to 17 The parallel flow heat exchanger 100 includes a first component 4 and at least one heat exchange tube 3, and the first component 4 is directly or indirectly connected to the heat exchange tube 3. The heat exchange tube 3 has a plurality of channels extending along its length direction; the first component 4 includes a first tube wall 41, the first component 4 has a first cavity 43, the wall surrounding the first cavity 43 includes the first tube wall 41, the first component 4 also includes a first plate 42a and a second plate 42b, the first plate 42a and the second plate 42b extend along the length direction of the first component 4, at least part of the first plate 42a and at least part of the second plate 42b are located in the first cavity 43, the first plate 42a and the second plate 42b are arranged along the width direction or the height direction of the first component 4, the first plate 42a is connected to the inner wall of the first tube wall 41, and the second plate 42b is connected to the inner wall of the first tube wall 41.

[0087] The first cavity 43 includes a first sub-cavity 431, a second sub-cavity 432 and a third sub-cavity 433, and the third sub-cavity 433 is directly connected to the multiple channels of the heat exchange tube 3. The first plate 42a includes a first channel 44, and the second plate 42b includes a second channel 45. The first channel 44 connects the first sub-cavity 431 and the second sub-cavity 432, and the second channel 45 connects the second sub-cavity 432 and the third sub-cavity 433, and the first channel 44 and the second channel 45 are indirectly connected.

[0088] The parallel flow heat exchanger 100 further includes a second component 7 , which is arranged in parallel with the first component 4 . The structures of the second component 7 and the first component 4 may be the same or different.

[0089] The parallel flow heat exchanger 100 also includes an inlet and outlet pipe 8, which is directly or indirectly connected to the first component 4, and the inlet and outlet pipe 8 has an inlet and outlet channel directly or indirectly connected to the first sub-cavity 431; and / or the inlet and outlet pipe 8 is directly or indirectly connected to the second component 7.

[0090] The inlet and outlet pipes 8 are used to inject heat exchange medium into the parallel flow heat exchanger 100. When heat exchange medium needs to be injected into the parallel flow heat exchanger 100, the heat exchange medium flows into the heat exchange tube 3 through the inlet and outlet channels, the first sub-cavity 431, the second sub-cavity 432, the third sub-cavity 433 and multiple channels on the heat exchange tube 3 in sequence, thereby realizing heat exchange between the heat exchange medium and the external medium (such as air).

[0091] By arranging the first plate 42a and the second plate 42b in the first cavity 43, the first cavity 43 can be divided into the first sub-cavity 431, the second sub-cavity 432 and the third sub-cavity 433, and the flow length of the heat exchange medium in the first component 4 is lengthened, so that the heat exchange medium is evenly distributed along the length direction of the first component 4 before flowing into the multiple channels of the heat exchange tube 3, which is beneficial to the distribution of the heat exchange medium in the heat exchange tube; at the same time, since the flow length of the heat exchange medium in the first component 4 is lengthened, the heat exchange medium can be fully mixed during the flow in the first cavity 43, and the temperature distribution of the heat exchange medium along the length direction of the first component 4 is even, which improves the heat exchange efficiency of the parallel flow heat exchanger 100. In addition, compared with the existing distribution component having a through hole or a through groove on its outer peripheral wall, the production difficulty of the existing distribution component can be effectively reduced, and the economic and time costs are reduced.

[0092] The first tube wall 41 includes a first sub-wall 411 and a second sub-wall 412 relatively arranged along the width direction (second direction D2) of the first component 4, a third sub-wall 413 and a fourth sub-wall 414 relatively arranged along the height direction (third direction D3) of the first component 4, and a fifth side wall (not shown in the figure) and a sixth side wall (not shown in the figure) relatively arranged along the length direction (first direction D1) of the first component 4.

[0093] Please continue to refer to Fig.15 In some embodiments, the first plate 42a and the second plate 42b are spaced apart in the first cavity 43 along the height direction (third direction D3) of the first component 4, so as to divide the first cavity 43 into a first sub-cavity 431, a second sub-cavity 432 and a third sub-cavity 433 in sequence along the height direction (third direction D3) of the first component 4.

[0094] Specifically, the first plate 42a and the second plate 42b can be connected to any three sub-walls of the first sub-wall 411, the second sub-wall 412, the fifth sub-wall or the sixth sub-wall, respectively. The gap between the sub-wall of the first sub-wall 411, the second sub-wall 412, the fifth sub-wall or the sixth sub-wall that is not connected to the first plate 42a and the first plate 42a forms a first channel 44. The gap between the sub-wall of the first sub-wall 411, the second sub-wall 412, the fifth sub-wall or the sixth sub-wall that is not connected to the second plate 42b and the second plate 42b forms a second channel 45.

[0095] At least one third plate 42c is also provided in the first cavity 43, and any third plate 42c is located between the first plate 42a and the second plate 42b to divide the second sub-cavity 432 into a plurality of sub-chambers along the height direction (third direction D3) of the first component 4, and any third plate 42c can be connected to any three sub-walls among the first sub-wall 411, the second sub-wall 412, the fifth sub-wall or the sixth sub-wall, and the gap between the sub-walls among the first sub-wall 411, the second sub-wall 412, the fifth sub-wall or the sixth sub-wall that are not connected to the third plate 42c and the third plate 42c forms a third channel 46 to connect the sub-chambers in the second sub-cavity 432.

[0096] The number of third plates 42c can be one, two, three or any other number. The more third plates 42c there are, the more sub-chambers are formed by dividing the second sub-chamber 432, and the more times the heat exchange medium flows around in the second sub-chamber 432, so that the heat exchange medium is distributed more evenly along the length direction (first direction D1) of the first component 4. No limitation is made here.

[0097] When the number of the third plate 42c is one, in a second plane perpendicular to the height direction of the first component 4 (the third direction D3), a projection of the first channel 44 formed between the first plate 42a and the first tube wall 41 does not overlap with a projection of the third channel 46 formed between the third plate 42c and the first tube wall 41 and is arranged at an angle of 180°. At the same time, a projection of the second channel 45 formed between the second plate 42b and the first tube wall 41 also does not overlap with a projection of the third channel 46 formed between the third plate 42c and the first tube wall 41 and is arranged at an angle of 180°.

[0098] When there are multiple third plates 42c, in a second plane perpendicular to the height direction of the first component 4 (the third direction D3), a projection of a first channel 44 formed between the first plate 42a and the first tube wall 41 and a projection of a third channel 46 formed between the third plate 42c located at the bottom and the first tube wall 41 do not overlap and are arranged at an angle of 180°, and a projection of a third channel 46 formed between two adjacent third plates 42c and the first tube wall 41 do not overlap and are arranged at an angle of 180°, and at the same time, a projection of a second channel 45 formed between the second plate 42b and the first tube wall 41 and a projection of a third channel 46 formed between the third plate 42c located at the top and the first tube wall 41 do not overlap and are arranged at an angle of 180°.

[0099] Please continue to refer to Fig.16 In some embodiments, the first plate 42a and the second plate 42b are spaced apart in the first cavity 43 along the width direction (second direction D2) of the first component 4 to separate the first cavity 43 into a first sub-cavity 431, a second sub-cavity 432 and a third sub-cavity 433 in sequence along the width direction (second direction D2) of the first component 4.

[0100] Specifically, the first plate 42a and the second plate 42b can be connected to any three sub-walls of the third sub-wall 413, the fourth sub-wall 414, the fifth sub-wall or the sixth sub-wall, respectively. The gap formed between the sub-wall of the third sub-wall 413, the fourth sub-wall 414, the fifth sub-wall or the sixth sub-wall that is not connected to the first plate 42a and the first plate 42a forms a first channel 44. The gap between the sub-wall of the third sub-wall 413, the fourth sub-wall 414, the fifth sub-wall or the sixth sub-wall that is not connected to the second plate 42b and the second plate 42b forms a second channel 45.

[0101] At least one third plate 42c is also provided in the first cavity 43, and any third plate 42c is located between the first plate 42a and the second plate 42b to divide the second sub-cavity 432 into a plurality of sub-chambers along the width direction (second direction D2) of the first component 4, and any third plate 42c can be connected to any three sub-walls among the third sub-wall 413, the fourth sub-wall 414, the fifth sub-wall or the sixth sub-wall, and the gap between the third plate 42c and the sub-wall that is not connected to the third plate 42c among the third sub-wall 413, the fourth sub-wall 414, the fifth sub-wall or the sixth sub-wall forms a third channel 46.

[0102] The number of third plates 42c can be one, two, three or any other number. The more third plates 42c there are, the more sub-chambers are formed by dividing the second sub-chamber 432, and the more times the heat exchange medium flows around in the second sub-chamber 432, so that the heat exchange medium is distributed more evenly along the length direction (first direction D1) of the first component 4. No limitation is made here.

[0103] When the number of the third plate 42c is one, in a third plane perpendicular to the width direction (second direction D2) of the first component 4, the projection of the first channel 44 formed between the first plate 42a and the first tube wall 41 does not overlap with the projection of the third channel 46 formed between the third plate 42c and the first tube wall 41 and is arranged at an angle of 180°. At the same time, the projection of the second channel 45 formed between the second plate 42b and the first tube wall 41 also does not overlap with the projection of the third channel 46 formed between the third plate 42c and the first tube wall 41 and is arranged at an angle of 180°.

[0104] When there are multiple third plates 42c, in a third plane perpendicular to the width direction (second direction D2) of the first component 4, the projection of the first channel 44 formed between the first plate 42a and the first tube wall 41 does not overlap with the projection of the third channel 46 formed between the third plate 42c located on the far right and the first tube wall 41, and they are arranged at an angle of 180°, the projections of the third channels 46 formed between two adjacent third plates 42c and the first tube wall 41 do not overlap with each other, and they are arranged at an angle of 180°, and at the same time, the projection of the second channel 45 formed between the second plate 42b and the first tube wall 41 does not overlap with the projection of the third channel 46 formed between the third plate 42c located on the far left and the first tube wall 41, and they are arranged at an angle of 180°.

[0105] The first plate 42a, the second plate 42b and the third plate 42c are arranged at intervals along the width direction (second direction D2) of the first component 4. Compared with the first plate 42a, the second plate 42b and the third plate 42c are arranged at intervals along the height direction (third direction D3) of the first component 4, the height dimension of the first component 4 can be reduced, so that the parallel flow heat exchanger 100 can adapt to an installation space with a smaller height.

[0106] Please continue to refer to Fig.17 In some embodiments, the first plate 42a and the second plate 42b are spaced apart in the first cavity 43 along the height direction (third direction D3) of the first component 4, so as to sequentially divide the first cavity 43 into a first sub-cavity 431, a second sub-cavity 432 and a third sub-cavity 433 along the height direction (third direction D3) of the first component 4. The first plate 42a and the second plate 42b can be connected by the first sub-wall 411, the second sub-wall 412, the fifth sub-wall and the sixth sub-wall, respectively. The first plate 42a is provided with a first channel 44 connecting the first sub-cavity 431 and the second sub-cavity 432, and the second plate 42b is provided with a second channel 45 connecting the second sub-cavity 432 and the third sub-cavity 433.

[0107] At least one third plate 42c is also provided in the first cavity 43, and any third plate 42c is located between the first plate 42a and the second plate 42b to divide the second sub-cavity 432 into a plurality of sub-chambers along the height direction (third direction D3) of the first component 4, and any third plate 42c can be connected to the first sub-wall 411, the second sub-wall 412, the fifth sub-wall and the sixth sub-wall, and the third plate 42c is provided with a third channel 46 connecting the sub-chambers in the second sub-cavity 432.

[0108] The number of third plates 42c can be one, two, three or any other number. The more third plates 42c there are, the more sub-chambers are formed by dividing the second sub-chamber 432, and the more times the heat exchange medium flows around in the second sub-chamber 432, so that the heat exchange medium is distributed more evenly along the length direction (first direction D1) of the first component 4. No limitation is made here.

[0109] When the number of third plates 42c is one, in a second plane perpendicular to the height direction of the first component 4 (the third direction D3), the projection of the first channel 44 provided on the first plate 42a and the projection of the third channel 46 provided on the third plate 42c do not overlap and are arranged at an angle of 180°, and at the same time, the projection of the second channel 45 provided on the second plate 42b also does not overlap with the projection of the third channel 46 provided on the third plate 42c and are arranged at an angle of 180°.

[0110] When there are multiple third plates 42c, in a second plane perpendicular to the height direction of the first component 4 (the third direction D3), the projection of the first channel 44 provided on the first plate 42a and the projection of the third channel 46 provided on the third plate 42c located at the lowermost side do not overlap and are arranged at an angle of 180°, the projections of the third channels 46 provided on two adjacent third plates 42c also do not overlap and are arranged at an angle of 180°, and at the same time, the projection of the second channel 45 provided on the second plate 42b and the projection of the third channel 46 provided on the third plate 42c located at the uppermost side do not overlap and are arranged at an angle of 180°.

[0111] It can be understood that the first plate 42a, the second plate 42b and the third plate 42c can also be arranged at intervals along the width direction (second direction D2) of the first component 4, and the first plate 42a, the second plate 42b and the third plate 42c can be connected by the third sub-wall 413, the fourth sub-wall 414, the fifth sub-wall and the sixth sub-wall respectively to reduce the height dimension of the first component 4, so that the parallel flow heat exchanger 100 can adapt to the installation space with smaller height.

[0112] The first channel 44 includes a through hole or a long groove; and / or the second channel 45 includes a through hole or a long groove, which is conducive to simplifying the structure of the first channel 44 and / or the second channel 45, reducing the difficulty of the production process, thereby improving production efficiency.

[0113] Please refer to Fig.18 In some embodiments, the first channel 44 and the second channel 45 may include a plurality of through holes spaced apart along the length direction (first direction D1 ) of the first component 4 .

[0114] Specifically, the number of through holes provided on the first plate 42a is smaller than the number of through holes provided on the second plate 42b; and / or the sum of the flow areas of the through holes provided on the first plate 42a is smaller than the sum of the flow areas of the through holes provided on the second plate 42b. In this way, the sum of the flow areas of the first channel 44 can be smaller than the sum of the flow areas of the second channel 45, thereby accelerating the heat exchange medium in the second sub-cavity 432 to flow from the second channel 45 into the third sub-cavity 433, and finally into the multiple channels of the heat exchange tube 3, thereby avoiding the accumulation of the heat exchange medium in the first component 4, and further reducing the filling amount of the heat exchange medium.

[0115] Please refer to Fig.19 In some embodiments, the first channel 44 and the second channel 45 can also be long grooves arranged along the length direction (first direction D1) of the first component 4, thereby replacing the opened through holes, which can simplify the production process of the first component 4 and thus improve production efficiency.

[0116] The flow area of ​​the long groove opened on the first plate 42a is smaller than the flow area of ​​the long groove opened on the second plate 42b. In this way, when the heat exchange medium flows into the first chamber 43 from the second channel 45, the heat exchange medium can be accelerated to flow out of the second sub-chamber 432 from the second channel 45, thereby avoiding the accumulation of the heat exchange medium in the first part and reducing the filling amount of the heat exchange medium.

[0117] It can be understood that the first channel 44 opened on the first plate 42a can be a long groove, and the second channel 45 opened on the second plate 42b can also be a long groove; or, the first channel 44 opened on the first plate 42a can be a long groove, and the second channel 45 opened on the second plate 42b can be a plurality of through holes; or, the first channel 44 opened on the first plate 42a can be a plurality of through holes, and the second channel 45 opened on the second plate 42b can be a long groove; or, the first channel 44 opened on the first plate 42a can be a plurality of through holes, and the second channel 45 opened on the second plate 42b can also be a plurality of through holes.

[0118] The sum of the flow areas of the first channel 44 is smaller than the sum of the flow areas of the second channel 45. Such a structural design can accelerate the heat exchange medium in the second sub-cavity 432 to flow from the second channel 45 into the third sub-cavity 433, and finally flow into the multiple channels of the heat exchange tube 3, thereby avoiding the accumulation of the heat exchange medium in the first component 4, and further reducing the filling amount of the heat exchange medium.

[0119] The third channel 46 may include a plurality of through holes spaced apart along the length direction (first direction D1) of the first component 4; or, the third channel 46 may also be a long groove disposed along the length direction (first direction D1) of the first component 4. Exemplarily, along the height direction (third direction D3) of the first component 4, in two adjacent third plates 42c, the flow area of ​​the third channel 46 opened on the upper third plate 42c is greater than the flow area of ​​the third channel 46 opened on the lower third plate 42c, and the flow area of ​​the third channel 46 opened on any third plate 42c is between the flow area of ​​the first channel 44 opened on the first plate 42a and the flow area of ​​the second channel 45 opened on the second plate 42b.

[0120] On the third aspect, the embodiment of the present application also provides a heat exchange system, including a compressor, a throttling component (such as a throttle valve) and a heat exchanger, wherein the heat exchanger includes the aforementioned parallel flow heat exchanger 100. The heat exchange system using the parallel flow heat exchanger 100 is beneficial to improving the heat exchange performance of the heat exchange system.

[0121] The parallel flow heat exchanger 100 disclosed in the embodiment of the present application can be used in, but is not limited to, heat exchange systems such as vehicle air conditioners, household air conditioners, and industrial air conditioners.

[0122] Since the first part 2 or the first component 4 of the parallel flow heat exchanger 100 can lengthen the flow length of the heat exchange medium, the heat exchange medium is evenly distributed along the length direction of the first part 2 or the first component 4. Therefore, the heat exchange system using the parallel flow heat exchanger 100 can reduce the distribution difference of the heat exchange medium on the multiple heat exchange tubes 3, and improve the heat exchange efficiency of the heat exchange system.

[0123] 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 parallel flow heat exchanger, characterized in that: include: a first tube, the first tube comprising a first tube wall, the first tube having a first lumen, and a wall surrounding the first lumen comprising the first tube wall; a second tube, the second tube being arranged in parallel with the first tube; A heat exchange tube, wherein the heat exchange tube comprises a microchannel heat exchange tube, wherein the microchannel heat exchange tube is directly or indirectly connected to the first tube, and wherein the microchannel heat exchange tube is directly or indirectly connected to the second tube; a first member, at least a portion of the first member is located in the first cavity, the first member includes a second tube wall, the first member has a second cavity, a wall surrounding the second cavity includes the second tube wall, the second cavity extends along the length direction of the first tube, the second cavity includes a first sub-cavity and a second sub-cavity, the first sub-cavity is indirectly connected to the first cavity, the second sub-cavity is directly connected to the first cavity, and the first sub-cavity is directly or indirectly connected to the second sub-cavity; Wherein, a projection of the second tube wall in a first plane perpendicular to the length direction of the first tube includes at least a portion of a spiral line.

2. The parallel flow heat exchanger according to claim 1, characterized in that: The first member comprises a first channel and a second channel, the first channel communicates with the first sub-cavity and the second sub-cavity, the second channel communicates with the first cavity and the second sub-cavity, and at least a portion of the first channel and at least a portion of the second channel extend along the length direction of the first tube; In a first plane perpendicular to the length direction of the first tube, a projection of the second tube wall includes at least a portion of a helical line.

3. The parallel flow heat exchanger according to claim 1, characterized in that: The second tube wall further comprises a first sub-wall and a second sub-wall, wherein the first sub-wall and the second sub-wall extend in the length direction of the first tube, and the first sub-wall and the second sub-wall have a thickness; The first sub-wall comprises one or more first through holes, the first through holes penetrate the first sub-wall, and the first through holes communicate with the first sub-cavity and the second sub-cavity; The second sub-wall comprises a plurality of second through holes, the second through holes penetrate the second sub-wall, at least some of the second through holes communicate with the second sub-cavity and the first cavity, and the first through holes are indirectly communicated with the second through holes; In a first plane perpendicular to the length direction of the first tube, the projection of the first sub-wall includes a first arc, the projection of the second sub-wall includes a plurality of second arcs, and a circumference of at least one of the second arcs is greater than that of the first arc.

4. The parallel flow heat exchanger according to claim 3, characterized in that: In the first plane, a projection center of at least one of the first through holes and a projection center of at least one of the second through holes are collinear.

5. The parallel flow heat exchanger according to claim 3 or 4, characterized in that: In the first plane, the projection of the second sub-wall includes at least three second circular arcs, the second circular arcs include one or more radii, and at least one of the radii of one second circular arc is different from at least one of the radii of another second circular arc; In the radial direction of the first tube, the maximum difference in the radius values ​​between two adjacent second arcs is inversely proportional to the distance from any one of the second arcs to the first arc.

6. The parallel flow heat exchanger according to claim 3 or 4, characterized in that: The number of the first through holes in the first sub-wall is smaller than the number of the second through holes in the second sub-wall; And / or, the sum of the flow areas of the first through holes is smaller than the sum of the flow areas of the second through holes.

7. The parallel flow heat exchanger according to claim 3, characterized in that: In the first plane, the projection of the second sub-wall includes a second circular arc, the second circular arc includes projections of a plurality of second through holes, and the number of the second through holes is greater than the number of the first through holes.

8. The parallel flow heat exchanger according to claim 3, characterized in that: In the first plane, the projection of the second sub-wall includes two second arcs, wherein, in the radial direction of the first tube, one of the second arcs close to the first arc includes the projection of multiple second through holes, and the number of the second through holes is greater than the number of the first through holes, and the other second arc away from the first arc includes the projection of at least one long groove.

9. The parallel flow heat exchanger according to claim 7 or 8, characterized in that: A ratio of the number of the first through holes to the number of the second through holes is less than or equal to 1 / 2.

10. A parallel flow heat exchanger, characterized in that: include: A heat exchange tube, wherein the heat exchange tube has a plurality of channels extending along the length direction thereof; A first component, the first component is directly or indirectly connected to the heat exchange tube, the first component includes a first tube wall, the first component has a first cavity, the wall surrounding the first cavity includes the first tube wall, the first component also includes a first plate, a second plate and a third plate, the first plate and the second plate extend along the length direction of the first component, at least part of the first plate and at least part of the second plate are located in the first cavity, the first plate and the second plate are arranged along the width direction or the height direction of the first component, the first plate is connected to the inner wall of the first tube wall, the second plate is connected to the inner wall of the first tube wall, the first cavity includes a first sub-cavity, a second sub-cavity and a third sub-cavity, the third sub-cavity is directly connected to a plurality of channels of the heat exchange tube, the third plate is located between the first plate and the second plate, and the third plate includes a third channel; The first plate includes a first channel, the second plate includes a second channel, the first channel connects the first sub-cavity and the second sub-cavity, the second channel connects the second sub-cavity and the third sub-cavity, and the first channel is indirectly connected to the second channel; Among them, the sum of the flow areas of the first channels is smaller than the sum of the flow areas of the second channels, and in a second plane perpendicular to the height direction of the first component, the projection of the first channel and the projection of the third channel do not overlap and are set at an angle of 180°, and the projection of the second channel and the projection of the third channel do not overlap and are set at an angle of 180°.

11. The parallel flow heat exchanger according to claim 10, characterized in that: The first channel includes a through hole or a long slot; and / or the second channel includes a through hole or a long slot.

12. A heat exchange system, characterized in that: The invention comprises a compressor, a throttling assembly and a heat exchanger, wherein the heat exchanger comprises the parallel flow heat exchanger according to any one of claims 1 to 11.

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