Microchannel parallel flow heat exchanger

Abstract

The present disclosure provides a microchannel parallel flow heat exchanger, which belongs to the field of heat exchange technology. The microchannel parallel flow heat exchanger includes a flat tube assembly, a header assembly and a fin assembly. The header assembly includes a first header and a second header, and the first header and the second header are arranged parallel to each other at intervals; the flat tube assembly includes a plurality of flat tube units, each of which is arranged in sequence at intervals along the length direction of the first header, and each flat tube unit includes a first flat tube portion and a second flat tube portion, and the first flat tube portion and the second flat tube portion are arranged alternately at intervals along the length direction of the first header, and the bent ends of the first flat tube portion and the second flat tube portion are connected together, and the straight end of the first flat tube portion is connected to the first header, and the straight end of the second flat tube portion is connected to the second header; the fin assembly includes a plurality of fin units, and a fin unit is sandwiched between each two adjacent first flat tube portions and the second flat tube portions. The present disclosure can reduce material costs.

Description

Technical Field

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

[0002] A heat exchanger is a common heat exchange device, which mainly includes a flat tube assembly, a header assembly and a fin assembly. The header assembly includes a first header and a second header. The first header and the second header are connected through the flat tube assembly. The fin assembly is arranged in the flat tube assembly to exchange heat with the coolant flowing in the flat tube assembly.

[0003] In the related art, in order to improve the heat exchange effect of the heat exchanger, two sets of header assemblies are usually set, and a flat tube is connected between the first header and the second header of each set of header assemblies, and the two sets of header assemblies are connected to each other. Such an arrangement allows the coolant to flow between the two sets of header assemblies, prolonging the time for the coolant to pass through the flat tubes, thereby prolonging the heat exchange time of the fin assembly to the coolant, thereby improving the heat exchange effect.

[0004] However, although the above heat exchanger improves the heat exchange effect, it has two sets of header assemblies, which leads to an increase in material costs. Summary of the invention

[0005] The embodiment of the present disclosure provides a microchannel parallel flow heat exchanger, which can reduce material costs while ensuring the heat exchange effect. The technical solution is as follows:

[0006] The embodiment of the present disclosure provides a microchannel parallel flow heat exchanger, wherein the microchannel parallel flow heat exchanger comprises a flat tube assembly, a header assembly and a fin assembly.

[0007] The header assembly comprises a first header and a second header, wherein the first header and the second header are arranged parallel to each other and spaced apart;

[0008] The flat tube assembly comprises a plurality of flat tube units, each of which is sequentially spaced along the length direction of the first header, each of which comprises a first flat tube portion and a second flat tube portion, the first flat tube portion and the second flat tube portion are both long strip structures, the first flat tube portion and the second flat tube portion are alternately spaced along the length direction of the first header, the first flat tube portion and the second flat tube portion each comprise a bent end and a straight end, the bent ends of the first flat tube portion and the second flat tube portion are connected together, the straight end of the first flat tube portion is connected to the first header, and the straight end of the second flat tube portion is connected to the second header;

[0009] The fin assembly includes a plurality of fin units, and one fin unit is sandwiched between each two adjacent first flat tube portions and second flat tube portions.

[0010] In an implementation of the present disclosure, each of the flat tube units further includes a connecting portion, one end of the connecting portion is connected to the bent end of the first flat tube portion, and the other end of the connecting portion is connected to the bent end of the second flat tube portion.

[0011] In another implementation of the present disclosure, the communication portion is a semi-annular flat tube structure, and the recess of the communication portion is arranged toward the first flat tube portion and the second flat tube portion.

[0012] In yet another implementation of the present disclosure, an inner diameter of the connecting portion is equal to the shortest distance between the first flat tube portion and the second flat tube portion.

[0013] In yet another implementation of the present disclosure, the first flat tube portion, the second flat tube portion, and the connecting portion are an integrated structural component.

[0014] In another implementation of the present disclosure, each of the connecting portions is located on a first straight line, the first straight line and the axis of the first collecting pipe are parallel to each other, and the shortest distance between the first straight line and the axis of the first collecting pipe is equal to the shortest distance between the first straight line and the axis of the second collecting pipe.

[0015] In yet another implementation of the present disclosure, in the same plane, an angle between a common perpendicular line between the first straight line and the axis of the first header and a common perpendicular line between the first straight line and the axis of the second header is no greater than 50°.

[0016] In another implementation of the present disclosure, for any two adjacent connecting portions, one connecting portion is located on a second straight line, a plane coplanar with the second straight line and the axis of the first collecting tube is perpendicular to a plane coplanar with the axes of the first collecting tube and the second collecting tube, and the other connecting portion is located on a third straight line, a plane coplanar with the third straight line and the axis of the second collecting tube is perpendicular to a plane coplanar with the axes of the first collecting tube and the second collecting tube, and both the second straight line and the third straight line are parallel to the axial direction of the first collecting tube.

[0017] In yet another implementation of the present disclosure, in the same plane, an angle between a common perpendicular line between the second straight line and the axis of the first header and a common perpendicular line between the second straight line and the axis of the second header is no greater than 25°.

[0018] In yet another implementation of the present disclosure, in the same plane, an angle between a common perpendicular line between the third straight line and the axis of the first header and a common perpendicular line between the third straight line and the axis of the second header is no greater than 25°.

[0019] The technical solution provided by the embodiments of the present disclosure has the following beneficial effects:

[0020] When heat is exchanged through the microchannel parallel flow heat exchanger provided by the embodiment of the present disclosure, the coolant flows in from the first header and flows out through the straight-connected end of the first flat tube part. During the circulation process in the first flat tube part, the fin unit clamped between the first flat tube part and the second flat tube part is used for heat exchange, thus realizing the first heat exchange of a flat tube unit. The coolant flows from the bent end of the first flat tube part to the bent end of the second flat tube part. During the communication process of the second flat tube part, the fin unit clamped between the first flat tube part and the second flat tube part is used for heat exchange, thus realizing the second heat exchange of the same flat tube unit. After that, it flows from the straight-connected end of the second flat tube part to the second header to complete the entire heat exchange process. That is to say, in a single flat tube unit provided by the present disclosure, heat exchange can be performed twice, thereby ensuring the heat exchange capacity. In addition, since the microchannel parallel flow heat exchanger provided by the present disclosure realizes the reflux of the coolant by using the bending of the flat tube unit itself, only two headers (the first header and the second header) need to be set, thereby reducing the material cost.

[0021] It can be seen that the microchannel parallel flow heat exchanger provided in the embodiment of the present disclosure can reduce material costs while ensuring the heat exchange effect. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0023] Figure 1 is a schematic structural diagram of a microchannel parallel flow heat exchanger provided in an embodiment of the present disclosure;

[0024] Figure 2 is a partial structural schematic diagram of a microchannel parallel flow heat exchanger provided in an embodiment of the present disclosure;

[0025] Figure 3 is a schematic structural diagram of a flat tube unit provided in an embodiment of the present disclosure;

[0026] Figure 4 is another partial structural schematic diagram of the microchannel parallel flow heat exchanger provided by an embodiment of the present disclosure;

[0027] Figure 5 is a front view of a flat tube unit provided by an embodiment of the present disclosure;

[0028] Figure 6 is a schematic structural diagram of another microchannel parallel flow heat exchanger provided in an embodiment of the present disclosure;

[0029] Figure 7 It is a front view of another flat tube unit provided in an embodiment of the present disclosure.

[0030] The symbols in the figure mean the following:

[0031] 1. Flat tube assembly; 11. Flat tube unit; 111. First flat tube portion; 112. Second flat tube portion; 113. Connecting portion; 2. Collector assembly; 21. First collector; 22. Second collector; 3. Fin assembly; 31. Fin unit. DETAILED DESCRIPTION

[0032] In order to make the objectives, technical solutions and advantages of the present disclosure more clear, the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings.

[0033] The present disclosure provides a microchannel parallel flow heat exchanger, such as Figure 1 As shown, the microchannel parallel flow heat exchanger includes a flat tube assembly 1, a header assembly 2 and a fin assembly 3.

[0034] The header assembly 2 includes a first header 21 and a second header 22 . The first header 21 and the second header 22 are arranged parallel to each other and spaced apart.

[0035] The flat tube assembly 1 includes a plurality of flat tube units 11, each of which is arranged in sequence along the length direction of the first collecting pipe 21, each of which includes a first flat tube portion 111 and a second flat tube portion 112, both of which are long strip structures, and are arranged alternately along the length direction of the first collecting pipe 21, and each of which includes a bent end and a straight end, the bent ends of the first flat tube portion 111 and the second flat tube portion 112 are connected together, the straight end of the first flat tube portion 111 is connected to the first collecting pipe 21, and the straight end of the second flat tube portion 112 is connected to the second collecting pipe 22.

[0036] Figure 2 The schematic diagram of the local structure of the microchannel parallel flow heat exchanger is shown in Figure 2. Figure 2 The fin assembly 3 includes a plurality of fin units 31 , and a fin unit 31 is sandwiched between each two adjacent first flat tube portions 111 and second flat tube portions 112 .

[0037] It should be noted that in order to more clearly show the structure of the flat tube unit 11, Figure 1 The fin unit 31 is omitted. Figure 2 Only a part of the fin unit 31 is shown. In fact, the fin unit 31 can extend from the bent end of the first flat tube portion 111 to the straight end of the first flat tube portion 111.

[0038] When heat exchange is performed through the microchannel parallel flow heat exchanger provided by the embodiment of the present disclosure, the coolant flows in from the first manifold 21 and flows out through the direct connection end of the first flat tube portion 111. During the circulation process in the first flat tube portion 111, heat exchange is performed using the fin unit 31 clamped between the first flat tube portion 111 and the second flat tube portion 112, thereby realizing the first heat exchange of a flat tube unit 11. The coolant flows from the bent end of the first flat tube portion 111 to the bent end of the second flat tube portion 112. During the communication process of the second flat tube portion 112, heat exchange is performed using the fin unit 31 clamped between the first flat tube portion 111 and the second flat tube portion 112, thereby realizing the second heat exchange of the same flat tube unit 11. Thereafter, the coolant flows from the direct connection end of the second flat tube portion 112 to the second manifold 22, completing the entire heat exchange process. In other words, in a single flat tube unit 11 provided by the present disclosure, heat exchange can be performed twice, thereby ensuring the heat exchange capacity. In addition, since the microchannel parallel flow heat exchanger provided by the present disclosure realizes the reflux of the coolant by utilizing the bending of the flat tube unit 11 itself, only two headers (a first header 21 and a second header 22) need to be provided, thereby reducing material costs.

[0039] It can be seen that the microchannel parallel flow heat exchanger provided in the embodiment of the present disclosure can reduce material costs while ensuring the heat exchange effect.

[0040] Figure 3 is the structural diagram of the flat tube unit, combined with Figure 3 In this embodiment, each flat tube unit 11 further includes a connecting portion 113 , one end of the connecting portion 113 is connected to the bent end of the first flat tube portion 111 , and the other end of the connecting portion 113 is connected to the bent end of the second flat tube portion 112 .

[0041] In the above implementation, the connecting portion 113 is used to connect the first flat tube portion 111 and the second flat tube portion 112 , so as to achieve the circulation of the cooling liquid between the first flat tube portion 111 and the second flat tube portion 112 .

[0042] Optionally, the first flat tube portion 111 , the second flat tube portion 112 and the connecting portion 113 are an integrated structural component.

[0043] In the above implementation, such an arrangement can ensure the structural integrity of the flat tube unit 11, which not only improves the structural strength of the flat tube unit 11, but also facilitates the production of the flat tube unit 11, thereby reducing the manufacturing cost and manufacturing efficiency.

[0044] Exemplarily, the first flat tube portion 111 , the second flat tube portion 112 and the connecting portion 113 may all be aluminum structural members to reduce the dead weight of the flat tube structure and ensure the heat exchange effect.

[0045] Optionally, the communication portion 113 is a semi-annular flat tube structure, and the recess of the communication portion 113 is arranged toward the first flat tube portion 111 and the second flat tube portion 112 .

[0046] In the above implementation, the connecting portion 113 is set as a semi-annular flat tube structure, which can ensure the permeability of the coolant in the connecting portion 113, so that the coolant can flow smoothly from the first flat tube portion 111 to the second flat tube portion 112 through the connecting portion 113, and the flow rate of the coolant can be guaranteed.

[0047] Figure 4 Schematic diagram of another partial structure of the microchannel parallel flow heat exchanger. By way of example, the inner diameter of the connecting portion 113 is equal to the shortest distance between the first flat tube portion 111 and the second flat tube portion 112 .

[0048] In the above implementation, such an arrangement can achieve the compactness of the structure of the microchannel parallel flow heat exchanger while ensuring the smooth flow of the coolant.

[0049] It should be noted that the shortest distance between the first flat tube portion 111 and the second flat tube portion 112 can be adjusted according to the size of the fin unit 31 , and the present disclosure does not limit this.

[0050] Exemplarily, the inner wall of the connecting portion 113 , the inner wall of the first flat tube portion 111 , and the inner wall of the second flat tube portion 112 are all flush.

[0051] In this way, the permeability of the coolant in the flat tube unit 11 can be further improved.

[0052] In addition, the depression of the connecting portion 113 is arranged toward the first flat tube portion 111 and the second flat tube portion 112, which can facilitate the placement of the fin unit 31 between the first flat tube portion 111 and the second flat tube portion 112 to ensure the heat exchange effect of the microchannel parallel flow heat exchanger.

[0053] See again Figure 1 In this embodiment, each connecting portion 113 is located on the first straight line L1, the first straight line L1 is parallel to the axis of the first collecting pipe 21, and the shortest distance between the first straight line L1 and the axis of the first collecting pipe 21 is equal to the shortest distance between the first straight line L1 and the axis of the second collecting pipe 22.

[0054] It should be noted that the first straight line L1 is a set virtual straight line used to describe the arrangement of the communication parts 113 , and can also be regarded as a virtual straight line formed by the arrangement of the communication parts 113 .

[0055] In the above implementation, each connecting portion 113 is located in the middle of the first header 21 and the second header 22, that is, the length of the coolant flowing from the straight end to the bent end of the first flat tube portion 111 is the same as the length of the coolant flowing from the straight end to the bent end of the second flat tube portion 112. This arrangement can ensure that the heat exchange performance of the first flat tube portion 111 and the second flat tube portion 112 are equally fully exerted, avoiding the occurrence of uneven heat exchange.

[0056] Figure 5 is a front view of the flat tube unit 11, combined with Figure 5 For example, in the same plane, an angle α between a common perpendicular line between the first straight line L1 and the axis of the first header 21 and a common perpendicular line between the first straight line L1 and the axis of the second header 22 is not greater than 50°.

[0057] In the above implementation, the angle α is limited by the production process and the installation space of the microchannel parallel flow heat exchanger. By setting the angle α to be no greater than 50°, the flat tube unit 11 can be manufactured at a relatively low manufacturing cost. In addition, the compactness of the structure of the microchannel parallel flow heat exchanger can be ensured, and the installation space required for the microchannel parallel flow heat exchanger will not be too large.

[0058] Figure 6 A schematic diagram of another microchannel parallel flow heat exchanger provided for the implementation of the present disclosure, combined with Figure 6 The structure of the microchannel parallel flow heat exchanger is Figure 1 The microchannel parallel flow heat exchangers shown are basically the same, the only difference being the arrangement of the flat tube units 11 .

[0059] In this embodiment, for any two adjacent connecting portions 113, one connecting portion 113 is located on the second straight line L2, and the plane coplanar with the second straight line L2 and the axis of the first collecting tube 21 is perpendicular to the plane coplanar with the axes of the first collecting tube 21 and the second collecting tube 22; the other connecting portion 113 is located on the third straight line L3, and the plane coplanar with the third straight line L3 and the axis of the second collecting tube 22 is perpendicular to the plane coplanar with the axes of the first collecting tube 21 and the second collecting tube 22; the second straight line L2 and the third straight line L3 are both parallel to the axial direction of the first collecting tube 21.

[0060] It should be noted that the second straight line L2 and the third straight line L3 are both virtual straight lines, which are used to describe the arrangement of the connecting parts 113 , and can also be regarded as virtual straight lines formed by the arrangement of the connecting parts 113 .

[0061] In the above implementation, two adjacent connecting portions 113 are arranged alternately to be aligned with the first header 21 and the second header 22 respectively, so as to improve the installation stability of the microchannel parallel flow heat exchanger.

[0062] Figure 7 is a front view of another flat tube unit 11, combined with Figure 7 For example, in the same plane, an angle β between a common perpendicular line between the second straight line L2 and the axis of the first header 21 and a common perpendicular line between the second straight line L2 and the axis of the second header 22 is not greater than 25°.

[0063] In the above implementation, the angle β is limited by the production process and the installation space of the microchannel parallel flow heat exchanger. By setting the angle β to be no greater than 25°, the flat tube unit 11 can be manufactured at a relatively low manufacturing cost. In addition, the compactness of the structure of the microchannel parallel flow heat exchanger can be ensured, and the installation space required for the microchannel parallel flow heat exchanger will not be too large.

[0064] Exemplarily, in the same plane, an angle γ between a common perpendicular line between the third straight line L3 and the axis of the first header 21 and a common perpendicular line between the third straight line L3 and the axis of the second header 22 is not greater than 25°.

[0065] In the above implementation, the angle γ is limited by the production process and the installation space of the microchannel parallel flow heat exchanger. By setting the angle γ to be no greater than 25°, the flat tube unit 11 can be manufactured at a relatively low manufacturing cost. In addition, the compactness of the structure of the microchannel parallel flow heat exchanger can be ensured, and the installation space required for the microchannel parallel flow heat exchanger will not be too large.

[0066] Exemplarily, the angle β and the angle γ may be equal to further improve the installation stability of the microchannel parallel flow heat exchanger.

[0067] The following is a brief introduction to the working process of the microchannel parallel flow heat exchanger provided by the embodiment of the present disclosure:

[0068] The coolant flows in from the first manifold 21 and flows out through the direct connection end of the first flat tube portion 111. During the circulation process in the first flat tube portion 111, heat exchange is performed using the fin unit 31 clamped between the first flat tube portion 111 and the second flat tube portion 112, thereby achieving the first heat exchange of a flat tube unit 11. The coolant flows from the bent end of the first flat tube portion 111 to the bent end of the second flat tube portion 112 through the connecting portion 113. During the connection process of the second flat tube portion 112, heat exchange is performed using the fin unit 31 clamped between the first flat tube portion 111 and the second flat tube portion 112, thereby achieving the second heat exchange of the same flat tube unit 11. Thereafter, the coolant flows from the direct connection end of the second flat tube portion 112 to the second manifold 22, completing the entire heat exchange process. In other words, in a single flat tube unit 11 provided by the present disclosure, heat exchange can be performed twice, thereby ensuring the heat exchange capacity.

[0069] In addition, since the microchannel parallel flow heat exchanger provided by the present disclosure realizes the reflux of the coolant by utilizing the bending of the flat tube unit 11 itself, only two headers (a first header 21 and a second header 22) need to be provided, thereby reducing material costs.

[0070] The above description is only an optional embodiment of the present disclosure and is not intended to limit the present disclosure. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A microchannel parallel flow heat exchanger, comprising a flat tube assembly (1), a header assembly (2) and a fin assembly (3), characterized in that: The header assembly (2) comprises a first header (21) and a second header (22), wherein the first header (21) and the second header (22) are arranged parallel to each other and spaced apart from each other; The flat tube assembly (1) comprises a plurality of flat tube units (11), each of the flat tube units (11) being arranged in sequence and spaced apart along the length direction of the first header (21), each of the flat tube units (11) comprising a first flat tube portion (111), a second flat tube portion (112) and a connecting portion (113), the first flat tube portion (111) and the second flat tube portion (112) both being long strip structures, the first flat tube portion (111) and the second flat tube portion (112) being arranged along the length direction of the first header (21). The first flat tube portion (111) and the second flat tube portion (112) are arranged in a staggered manner in the length direction; both the first flat tube portion (111) and the second flat tube portion (112) comprise a bent end and a straight end; the straight end of the first flat tube portion (111) is connected to the first current collecting pipe (21); the straight end of the second flat tube portion (112) is connected to the second current collecting pipe (22); one end of the communication portion (113) is connected to the bent end of the first flat tube portion (111); and the other end of the communication portion (113) is connected to the bent end of the second flat tube portion (112); For any two adjacent connecting portions (113), one of the connecting portions (113) is located on a second straight line, a plane coplanar with the second straight line and the axis of the first current collecting tube (21) is perpendicular to a plane coplanar with the axes of the first current collecting tube (21) and the second current collecting tube (22), and the other connecting portion (113) is located on a third straight line, a plane coplanar with the third straight line and the axis of the second current collecting tube (22) is perpendicular to a plane coplanar with the axes of the first current collecting tube (21) and the second current collecting tube (22), and the second straight line and the third straight line are both parallel to the axial direction of the first current collecting tube (21); In the same plane, the angle between the common perpendicular line between the second straight line and the axis of the first header (21) and the common perpendicular line between the second straight line and the axis of the second header (22) is not greater than 25°; in the same plane, the angle between the common perpendicular line between the third straight line and the axis of the first header (21) and the common perpendicular line between the third straight line and the axis of the second header (22) is not greater than 25°; The fin assembly (3) comprises a plurality of fin units (31), wherein one fin unit (31) is sandwiched between two adjacent first flat tube portions (111) and the second flat tube portions (112) of the same flat tube unit (11), and, in two adjacent flat tube units (11), one fin unit (31) is sandwiched between the first flat tube portion (111) of one flat tube unit (11) and the second flat tube portion (112) of the other flat tube unit (11).

2. The microchannel parallel flow heat exchanger according to claim 1, characterized in that: The communication portion (113) is a semi-annular flat tube structure, and the recess of the communication portion (113) is arranged toward the first flat tube portion (111) and the second flat tube portion (112).

3. The microchannel parallel flow heat exchanger according to claim 2, characterized in that: The inner diameter of the communication portion (113) is equal to the shortest distance between the first flat tube portion (111) and the second flat tube portion (112).

4. The microchannel parallel flow heat exchanger according to claim 1, characterized in that: The first flat tube portion (111), the second flat tube portion (112) and the connecting portion (113) are an integrated structural component.

5. The microchannel parallel flow heat exchanger according to claim 1, characterized in that: Each of the connecting portions (113) is located on a first straight line, the first straight line and the axis of the first collecting pipe (21) are parallel to each other, and the shortest distance between the first straight line and the axis of the first collecting pipe (21) is equal to the shortest distance between the first straight line and the axis of the second collecting pipe (22).

6. The microchannel parallel flow heat exchanger according to claim 5, characterized in that: In the same plane, the angle between a common perpendicular line between the first straight line and the axis of the first header (21) and a common perpendicular line between the first straight line and the axis of the second header (22) is not greater than 50°.

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