Heat exchanger formed by splicing multiple layers of core bodies

Abstract

The utility model belongs to the technical field of heat exchangers, particularly relates to a heat exchanger formed by splicing multiple layers of core bodies, and solves the problems that a plurality of stacked heat exchange core bodies are stably connected and cannot be quickly positioned, and the processing efficiency is not favorably improved. The heat exchanger formed by splicing the multiple layers of core bodies comprises at least two heat exchange core bodies arranged in a stacked mode, each heat exchange core body comprises two collecting pipes arranged in parallel and a plurality of flat pipes connected between the two collecting pipes, the multiple heat exchange core bodies are connected in series through at least one cross pipe, the upstream side collecting pipes of the upstream heat exchange core bodies are communicated with the flat pipes, and the downstream side collecting pipes of the downstream heat exchange core bodies are communicated with the flat pipes. The downstream side collecting pipe of the downstream heat exchange core body is connected with a liquid inlet and outlet pipe, and the adjacent heat exchange core bodies are connected through a positioning connection structure. The effect of stable connection and fixation between the heat exchange core bodies is achieved, meanwhile, quick butt joint and positioning can be achieved before fixation, and the machining efficiency is improved.

Description

Technical Field

[0001] This utility model belongs to the field of heat exchanger technology, and specifically relates to a multi-layer core splicing heat exchanger. Background Technology

[0002] Traditional heat exchangers mostly employ a single-layer core structure, and their heat exchange efficiency is limited by the core volume and flow channel length. To improve heat exchange efficiency, some heat exchangers increase the length of the heat exchange medium flow channel by stacking multiple cores and connecting them in series.

[0003] However, in existing multi-layer heat exchangers, there is a lack of alignment and positioning structures between the cores, making it difficult to quickly position and align them during processing, which affects subsequent production efficiency. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a multi-layer core splicing heat exchanger.

[0005] To achieve the innovative objectives of this utility model, the following technical solutions can be used:

[0006] A multi-layer core heat exchanger includes at least two stacked heat exchange cores. Each heat exchange core includes two parallel manifolds and several flat tubes connected between the two manifolds. The multiple heat exchange cores are connected in series by at least one cross tube. The upstream manifold of the upstream heat exchange core and the downstream manifold of the downstream heat exchange core are connected to inlet and outlet liquid pipes. Adjacent heat exchange cores are connected by a positioning connection structure.

[0007] This utility model's heat exchanger features multiple stacked heat exchange cores. In each core, the heat exchange medium flows from one manifold through a flat tube to another, exchanging heat with the air through the tube wall. Fins can also be added to the flat tubes to increase the contact area with the air and improve heat exchange efficiency. The manifolds of the multiple cores are connected by cross-pipes, allowing the heat exchange medium flow channels of each core to be connected in series into a long channel, ensuring efficient and smooth flow of the heat exchange medium. The upstream inlet and outlet pipes are used to input the heat exchange medium, while the downstream pipes are used to output it. Furthermore, the positioning and connection structure connects the heat exchange cores into a single unit, ensuring integrity. This structure also allows for positioning of the cores before fixing, facilitating processing and improving production efficiency.

[0008] In the aforementioned multi-layer core splicing heat exchanger, at least two side plates distributed on both sides of the flat tube assembly are provided between the heat exchange cores. The positioning connection structure includes a vertical bend on the side plate, the vertical bends of adjacent side plates are attached to each other and fixedly connected by a brazing structure; the side plate and the flat tube are parallel, and the included angle between the flat tube and the manifold is 90 degrees or less.

[0009] Flat tubes are arranged at intervals along their thickness direction to form a flat tube group. Side plates are provided on both outer sides of this arrangement direction. The vertical bends on the side plates are bent in the thickness direction, forming connecting planes parallel to the thickness direction of the flat tubes. Two adjacent and opposite connecting planes are fitted together and fixedly connected by a brazing structure, achieving the effect of connecting adjacent heat exchange cores into a single unit through the side plates. The flat tubes and manifolds can be arranged vertically (with an included angle of 90 degrees), resembling a rectangle, or inclined (with an included angle less than 90 degrees), resembling a parallelogram, to adapt to different installation scenarios.

[0010] In the aforementioned multi-layer core spliced ​​heat exchanger, the vertical bending section is J-shaped, with one end integrally connected to the width side of the side plate, and a gap is formed between adjacent side plates; the vertical bending section is evenly distributed along the length direction of the side plate.

[0011] The vertical bend extends from the width side of the side plate in a smooth J-shape. The connecting plane of the vertical bend protrudes from this width side, so that when the two connecting planes are in contact, the width side of the side plate does not touch. The gap between them allows air to pass through, reducing obstruction to the flat tube and fins and improving heat exchange efficiency. Moreover, the extension direction of the vertical bend is evenly distributed, and the alignment of the heat exchange core can be achieved by aligning the vertical bends of adjacent side plates, without the need to set additional positioning points, thus improving production efficiency.

[0012] In the aforementioned multi-layer core splicing heat exchanger, the side plate has several slots, and the shape of the slots includes one or more of the following: triangle, rectangle, trapezoid, and arc.

[0013] Setting slots on the side of the edge plate helps to reduce stress during the stamping process and reduce the possibility of deformation, cracking or reduced fatigue life.

[0014] In the aforementioned multi-layer core spliced ​​heat exchanger, the manifold is provided with an adapter seat, the adapter seat is connected to the cross tube, and the adapter seat is provided with a connecting cavity that connects the cross tube and the manifold's collection cavity.

[0015] The adapter is used to transition between the manifold and the cross-connect, ensuring a stable connection between the manifold and the cross-connect.

[0016] In the aforementioned multi-layer core spliced ​​heat exchanger, the adapter seat has an arc-shaped interface on its side with an inner diameter that matches the outer diameter of the manifold. The manifold is embedded in the arc-shaped interface, and the manifold wall has a through hole corresponding to the arc-shaped interface. The adapter seat has an insertion interface that communicates with the arc-shaped interface, and the end of the cross tube is inserted into the insertion interface.

[0017] The shape and size of the manifold are adapted to the arc-shaped interface, and the manifold can fit perfectly into the arc-shaped interface, ensuring a stable connection and a seal. The through hole on the manifold ensures the connection between the adapter and the manifold cavity. The inner diameter of the insertion interface on the adapter is adapted to the outer diameter of the cross tube, and the cross tube is inserted into the insertion interface for easy integrated furnace brazing.

[0018] In the aforementioned multi-layer core splicing heat exchanger, the adapter is square, the insertion interface is located on the bottom or side of the adapter, and its extension direction is adapted to the length direction of the manifold or the thickness direction of the heat exchange core. The cross tube is U-shaped, straight, or zigzag.

[0019] The insertion interface can be located on any surface of the adapter, and can be selected according to the convenience of processing and the length control of the connecting pipe. For example, when the adapters on adjacent manifolds are flush, the insertion interface can be set on the opposite side of the adapter, with the cross tube in a straight line, directly connecting the two adapters. When the adapters on adjacent manifolds are staggered, the insertion interface can be set on the opposite bottom surface of the adapter, with the cross tube in a corresponding zigzag shape. Alternatively, to facilitate the installation of the cross tube, the insertion interface can also be set on the same side of the adapter, with the cross tube in a U-shape, which can be inserted into the adapter from the thickness direction of the heat exchange core.

[0020] In the aforementioned multi-layer core spliced ​​heat exchanger, the adapter is provided with a tubular docking part, which axially penetrates to form the insertion interface, and the cross tube end is connected to the outer end of the insertion interface.

[0021] The tubular connection of the adapter increases the length of the connector, which helps to improve the connection strength between the tube and the connector.

[0022] In the aforementioned multi-layer core spliced ​​heat exchanger, the arc-shaped interface and the manifold, as well as the insertion interface and the end of the cross tube, are integrally fixed in the furnace by a brazing structure.

[0023] The adapter and manifold, as well as the manifold and cross pipe, are integrally welded in the furnace using a brazing structure, which has higher processing efficiency compared to flame welding.

[0024] In the aforementioned multi-layer core splicing heat exchanger, the heat exchange cores are arranged in the same direction, the manifold sides of adjacent heat exchange cores are in contact, and at least one brazing structure is provided between them.

[0025] The manifold is provided with an inlet / outlet pipe connector. One end of the inlet / outlet pipe is inserted into the inlet / outlet pipe connector and fixed by a brazing structure. The other end is provided with a butt flare. The inlet / outlet pipe connector and the manifold wall are provided with a channel connecting the inlet / outlet pipe and the manifold cavity.

[0026] The manifolds of adjacent heat exchange cores are in close contact, and a brazing structure between them can further improve the connection strength. The inlet and outlet pipe connectors are used to connect the inlet and outlet liquid pipes to the manifolds. One end of the inlet and outlet liquid pipes and the connecting hole of the inlet and outlet pipe connectors are fixed in the furnace as a whole by brazing, which has high processing efficiency. The butt flared ends of the inlet and outlet liquid pipes are used to connect the input or output pipelines of the heat exchange medium.

[0027] Compared with the prior art, the present invention has the following main advantages:

[0028] 1. The heat exchanger of this utility model has multiple heat exchange cores stacked and arranged, and the manifolds of the multiple heat exchange cores are connected by cross-pipes, so that the heat exchange medium flow channels of each heat exchange core are connected in series to form a long channel, ensuring efficient and smooth flow of the heat exchange medium. In addition, the positioning connection structure connects the heat exchange cores into a whole, ensuring integrity. Moreover, the positioning connection structure can also be positioned before each heat exchange core is fixed, which facilitates processing and improves production efficiency.

[0029] 2. The vertical bend extends from the width side of the side plate in a smooth J-shape. The connecting plane of the vertical bend protrudes from this width side, so that when the two connecting planes are in contact, the width side of the side plate does not touch. The gap between them allows air to pass through, reducing obstruction to the flat tube and fins and improving heat exchange efficiency. Moreover, the extension direction of the vertical bend is evenly distributed, and the alignment of the heat exchange core can be achieved by aligning the vertical bends of adjacent side plates, without the need to set additional positioning points, thus improving production efficiency.

[0030] 3. Setting slots on the side of the edge plate helps to reduce stress during the stamping process and reduce the possibility of deformation, cracks or reduced fatigue life.

[0031] 4. The adapter and manifold, as well as the manifold and cross pipe, are integrally welded in the furnace using a brazing structure, resulting in higher processing efficiency.

[0032] 5. The manifolds of adjacent heat exchange cores are in close contact, and a brazing structure can be set between them to further improve the connection strength. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the overall structure provided by this utility model (Example 1);

[0034] Figure 2This is a cross-sectional schematic diagram provided by the present invention (Example 1);

[0035] Figure 3 This is a left-side view of the side plate provided by this utility model;

[0036] Figure 4 This is a front view schematic diagram of the side plate provided by this utility model (Example 1);

[0037] Figure 5 This is a schematic diagram of the structure of the adapter provided by this utility model;

[0038] Figure 6 This is a schematic diagram of the positioning and connection structure provided by this utility model (Example 2).

[0039] Figure 7 This is a schematic diagram of the positioning and connection structure provided by this utility model (Example 3).

[0040] Figure 8 The front view diagram of the side plate provided by this utility model (Example 4).

[0041] In the figure, the heat exchange core is 1, the manifold is 2, the flat tube is 3, the cross tube is 4, the inlet and outlet tubes are 5, the positioning connection structure is 6, the side plate is 7, the vertical bend is 8, the slot is 9, the adapter is 10, the connecting cavity is 11, the arc-shaped interface is 12, the insertion interface is 13, the tubular docking part is 14, the inlet and outlet tube connection seat is 15, and the docking flare is 16. Detailed Implementation

[0042] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0043] Example 1

[0044] Specific implementation examples Figure 1-5 As shown, this multi-layer core heat exchanger includes two stacked heat exchange cores 1. Each heat exchange core 1 includes two parallel manifolds 2 and several flat tubes 3 connected between the two manifolds 2. The flat tubes 3 are perpendicular to the manifolds 2. The two heat exchange cores 1 are connected in series by a cross tube 4. The upstream manifold 2 of the upstream heat exchange core 1 and the downstream manifold 2 of the downstream heat exchange core 1 are connected to inlet and outlet liquid pipes 5. Adjacent heat exchange cores 1 are connected by a positioning connection structure 6.

[0045] Specifically, the main body of this heat exchanger consists of two stacked heat exchange cores 1. The two heat exchange cores 1 are connected by a cross-pipe 4 via their manifolds 2, allowing the heat exchange medium flow channels of each heat exchange core 1 to be connected in series into a long channel, ensuring efficient and smooth flow of the heat exchange medium. The upstream inlet and outlet pipes 5 are used to input the heat exchange medium, while the downstream ones are used to output the heat exchange medium. Furthermore, the positioning connection structure 6 connects each heat exchange core 1 into a whole, ensuring integrity. Moreover, the positioning connection structure 6 can also position each heat exchange core 1 before fixing, facilitating processing and improving production efficiency.

[0046] like Figure 1-4 As shown, two side plates 7 are distributed on both sides of the flat tube assembly between the heat exchange cores 1. The positioning and connecting structure 6 includes vertical bends 8 on the side plates 7. The vertical bends 8 of adjacent side plates 7 are attached to each other and fixedly connected by a brazing structure. The vertical bends 8 are J-shaped, with one end integrally connected to the width side of the side plate 7, and a gap is formed between adjacent side plates 7. The vertical bends 8 are evenly distributed along the length of the side plates 7. Several slots 9 are provided on the side of the side plates 7, and the slots 9 are triangular in shape.

[0047] Specifically, flat tubes 3 are arranged at intervals along the thickness direction to form a flat tube group. Side plates 7 are provided on both outer sides of this arrangement direction. Vertical bends 8 on the side plates 7 bend in the thickness direction, forming connecting planes parallel to the thickness direction of the flat tubes 3. Two adjacent and opposite connecting planes are fitted together and fixedly connected by a brazing structure, achieving the effect of connecting adjacent heat exchange cores 1 into one unit through the side plates 7. The connecting planes of the vertical bends 8 protrude beyond the width side of the flat tube 3, so that when two connecting planes are in contact, the width side of the side plates 7 does not touch, allowing air to pass through the gap, reducing obstruction to the flat tubes 3 and fins, and improving heat exchange efficiency. Furthermore, the vertical bends 8 are evenly distributed along their extension direction, and aligning the vertical bends 8 of adjacent side plates 7 achieves the alignment and positioning of the heat exchange cores 1, eliminating the need for additional positioning points and improving production efficiency. The slots 9 provided on the sides of the side plates 7 help reduce stress during the stamping process, reducing the possibility of deformation, cracks, or decreased fatigue life.

[0048] like Figure 1 , 5 As shown, the manifold 2 is provided with an adapter 10, and a cross pipe 4 is connected to the adapter 10. The adapter 10 has a connecting cavity 11 that connects the cross pipe 4 and the manifold 2. The adapter 10 has an arc-shaped interface 12 on its side with an inner diameter that matches the outer diameter of the manifold 2. The manifold 2 is embedded in the arc-shaped interface 12, and the wall of the manifold 2 has a through hole corresponding to the arc-shaped interface 12. The adapter 10 has a plug interface 13 that communicates with the arc-shaped interface 12, and the end of the cross pipe 4 is inserted into the plug interface 13.

[0049] Specifically, the adapter 10 is used to transition the manifold 2 and the cross tube 4, ensuring a stable connection between the manifold 2 and the cross tube 4. The shape and size of the manifold 2 are adapted to the arc-shaped interface 12, allowing the manifold 2 to fit snugly within the arc-shaped interface 12, ensuring a secure and sealed connection. The through hole on the manifold 2 ensures communication between the adapter 10 and the manifold cavity. The inner diameter of the insertion interface 13 on the adapter 10 is adapted to the outer diameter of the cross tube 4, facilitating the insertion of the cross tube 4 into the insertion interface 13 for integrated furnace brazing.

[0050] In this embodiment, the adapter 10 is square, and the insertion interface 13 is located on the same side of the adapter 10, with its extension direction conforming to the thickness direction of the heat exchange core 1. The cross tube 4 is U-shaped. The adapter 10 is provided with a tubular connecting part 14, which axially penetrates to form the insertion interface 13. The end of the cross tube 4 is connected to the outer end of the insertion interface 13. The arc-shaped connecting interface 12 and the manifold 2, as well as the insertion interface 13 and the end of the cross tube 4, are integrally fixed in the furnace by a brazing structure.

[0051] Specifically, the tubular connecting part 14 of the adapter 10 increases the length of the insertion interface 13, which helps to improve the connection strength between the cross tube 4 and the insertion interface 13. The adapter 10 and the manifold 2, as well as the manifold 2 and the cross tube 4, are integrally welded in the furnace through a brazing structure, which has higher processing efficiency compared to flame welding.

[0052] As an optimization of this embodiment, the heat exchange cores 1 are arranged in the same direction, the sides of the manifolds 2 of adjacent heat exchange cores 1 are in contact, and there are two brazing structures between them; the manifold 2 is provided with inlet and outlet pipe connection seats 15, one end of the inlet and outlet liquid pipe 5 is inserted into the inlet and outlet pipe connection seat 15 and fixed by the brazing structure, and the other end is provided with a butt flared opening 16. The inlet and outlet pipe connection seat 15 and the pipe wall of the manifold 2 are provided with channels connecting the inlet and outlet liquid pipe 5 and the manifold cavity.

[0053] Specifically, the manifolds 2 of adjacent heat exchange cores 1 are in contact with each other, and a brazing structure is set between them to further improve the connection strength. The inlet / outlet pipe connector 15 is used to connect the inlet / outlet liquid pipe 5 and the manifold 2. One end of the inlet / outlet liquid pipe 5 and the connecting hole of the inlet / outlet pipe connector 15 are fixed in the furnace as a whole by the brazing structure, which has high processing efficiency. The butt flared end 16 of the inlet / outlet liquid pipe 5 is used to connect the input or output pipeline of the heat exchange medium.

[0054] The specific working principle is as follows: The heat exchange medium is input from the input pipe through the inlet and outlet pipes 5 to the upstream manifold 2, and then through the flat pipe 3 into another manifold 2 of the heat exchange core 1. After that, it flows into the downstream heat exchange core 1 through the cross pipe 4. Similarly, it passes through the manifold 2 and the flat pipe 3 of the downstream heat exchange core 1 in sequence, and then is output from the inlet and outlet pipes 5 on the downstream manifold 2. When the heat exchange medium flows in the flat pipe 3, it exchanges heat with the air through the pipe wall.

[0055] Example 2

[0056] The working principle of this embodiment is basically the same as that of embodiment 1, except that the position of the insertion interface 13 and the shape of the cross tube 4 are different.

[0057] like Figure 6 As shown, the two manifolds 2 are not attached to each other, the insertion port 13 is located on the opposite side of the manifolds 2, and its extension direction is adapted to the thickness direction of the heat exchange core 1, and the cross tube 4 is straight.

[0058] Specifically, when the adapters 10 on adjacent manifolds 2 are flush, the plug 13 can be set on the opposite side of the adapter 10, the cross pipe 4 is in a straight line, and directly connects the two adapters 10.

[0059] Example 3

[0060] The working principle of this embodiment is basically the same as that of embodiment 1, except that the position of the plug interface 13 on the adapter 10 and the shape of the cross tube 4 are different.

[0061] like Figure 7 As shown, the insertion interface 13 is located on the opposite bottom surface of the adapter 10, and its extension direction is adapted to the length direction of the manifold 2, and the cross tube 4 is in the shape of a broken line.

[0062] Example 4

[0063] The working principle of this embodiment is basically the same as that of embodiment 1, except that the shape of the slot 9 is different.

[0064] Specific implementation examples Figure 8 As shown, the slot 9 is arc-shaped, which is close to a semi-elliptical shape.

[0065] Example 5

[0066] The working principle of this embodiment is basically the same as that of embodiment 1, except that the angle between the flat tube 3 and the manifold 2 is different.

[0067] In this embodiment, the angle between the flat tube 3 and the manifold 2 is less than 90 degrees. That is, the flat tube 3 is inserted obliquely into the manifold 2, forming a shape similar to a parallelogram.

[0068] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A multi-layer core splicing heat exchanger, comprising at least two stacked heat exchange cores (1), wherein each heat exchange core (1) includes two parallel manifolds (2) and a plurality of flat tubes (3) connecting the two manifolds (2), characterized in that, Multiple heat exchange cores (1) are connected in series by at least one cross pipe (4). The upstream manifold (2) of the upstream heat exchange core (1) and the downstream manifold (2) of the downstream heat exchange core (1) are connected to inlet and outlet pipes (5). Adjacent heat exchange cores (1) are connected by a positioning connection structure (6).

2. The multi-layer core spliced ​​heat exchanger according to claim 1, characterized in that, The heat exchange core (1) is provided with at least two side plates (7) distributed on both sides of the flat tube group. The positioning connection structure (6) includes a vertical bending part (8) provided on the side plate (7). The vertical bending parts (8) of adjacent side plates (7) are attached to each other and are fixedly connected by a brazing structure. The side plate (7) and the flat tube (3) are parallel, and the included angle between the flat tube (3) and the manifold (2) is 90 degrees or less.

3. The multi-layer core spliced ​​heat exchanger according to claim 2, characterized in that, The vertical bending portion (8) is J-shaped, with one end integrally connected to the width side of the side plate (7), and a gap is formed between adjacent side plates (7); the vertical bending portion (8) is evenly distributed along the length direction of the side plate (7).

4. The multi-layer core spliced ​​heat exchanger according to claim 2, characterized in that, The side plate (7) has several slots (9) on its side, and the shape of the slots (9) includes one or more of the following: triangle, rectangle, trapezoid, and arc.

5. The multi-layer core spliced ​​heat exchanger according to claim 1, characterized in that, The manifold (2) is provided with a connector (10), the connector (10) is connected to the cross pipe (4), and the connector (10) is provided with a connecting cavity (11) that connects the cross pipe (4) and the manifold (2).

6. The multi-layer core spliced ​​heat exchanger according to claim 5, characterized in that, The adapter (10) is provided with an arc-shaped interface (12) on its side, the inner diameter of which is adapted to the outer diameter of the manifold (2). The manifold (2) is embedded in the arc-shaped interface (12). The manifold (2) has a through hole on its wall corresponding to the arc-shaped interface (12). The adapter (10) is provided with a plug interface (13) that communicates with the arc-shaped interface (12). The end of the cross tube (4) is inserted into the plug interface (13).

7. The multi-layer core spliced ​​heat exchanger according to claim 6, characterized in that, The adapter (10) is square, the plug (13) is located on the bottom or side of the adapter (10), and its extension direction is adapted to the length direction of the manifold (2) or the thickness direction of the heat exchange core (1). The cross tube (4) is U-shaped, straight, or broken.

8. The multi-layer core spliced ​​heat exchanger according to claim 6, characterized in that, The adapter (10) is provided with a tubular docking part (14), which axially penetrates to form the insertion interface (13).

9. The multi-layer core spliced ​​heat exchanger according to claim 6, characterized in that, The arc-shaped interface (12) and the manifold (2), as well as the insertion interface (13) and the end of the cross pipe (4), are fixed together by a brazing structure in a furnace.

10. The heat exchanger with multi-layer core assembly according to any one of claims 1-9, characterized in that, The heat exchange cores (1) are arranged in the same direction, the sides of the manifolds (2) of adjacent heat exchange cores (1) are in contact, and there is at least one brazing structure between them; The manifold (2) is provided with an inlet / outlet pipe connector (15). One end of the inlet / outlet pipe (5) is inserted into the inlet / outlet pipe connector (15) and fixed by a brazing structure. The other end is provided with a butt flared opening (16). The inlet / outlet pipe connector (15) and the manifold (2) are provided with a channel connecting the inlet / outlet pipe (5) and the manifold cavity.

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