Multi-layer assembled micro-channel heat exchanger

Abstract

The utility model belongs to the technical field of heat exchangers, and particularly relates to a multi-layer assembled micro-channel heat exchanger which solves the problem that the heat exchange efficiency is low when the multi-layer assembled micro-channel heat exchanger is installed in a small space. The multi-layer assembled micro-channel heat exchanger comprises heat exchange core bodies, each heat exchange core body comprises two collecting pipes arranged in parallel and a flat pipe set connected between the two collecting pipes, at least two sets of heat exchange core bodies are arranged in a layered mode, and the multiple sets of heat exchange core bodies are arranged in a stepped and staggered mode in the length direction of the collecting pipes. The heat exchange core bodies are connected through a fixing structure. The heat exchanger can be obliquely mounted in a narrow channel space and has higher heat exchange efficiency.

Description

Technical Field

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

[0002] Microchannels, also known as microchannel heat exchangers, consist of flat tubes with multiple tiny flow channels inside. The two ends of the flat tubes are connected to manifolds, and the heat exchange medium flows from one manifold through the flat tubes to another. The flat tubes come into contact with the air to achieve heat exchange.

[0003] In practical applications, heat exchangers may need to be installed in a small space, such as a tubular channel. Existing heat exchangers can only be installed vertically in this channel. Due to the limited cross-sectional area, their heat exchange efficiency is also low, which may make it difficult to meet the expected requirements. Utility Model Content

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

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

[0006] A multi-layer assembled microchannel heat exchanger includes a heat exchange core, which includes two parallel manifolds and several flat tubes connected between the two manifolds. The heat exchange core is arranged in at least two sets, and the multiple sets of heat exchange cores are arranged in a stepped staggered manner along the length of the manifolds. The heat exchange cores are connected by a fixed structure.

[0007] This microchannel heat exchanger is assembled from multiple heat exchange cores. Each heat exchange core consists of a manifold and flat tubes arranged in parallel to form a flat tube group. A manifold cavity is formed within each manifold, and microchannels are formed within each flat tube. The microchannels and manifold cavity are connected. The heat exchange medium flows from one manifold through the flat tubes to another. During this process, the flat tubes come into contact with air to achieve heat exchange. Fins can also be installed on the flat tubes to improve heat exchange efficiency, which is existing technology. Furthermore, the heat exchange cores of this microchannel heat exchanger are staggered, effectively tilting them to one side. The manifold changes from vertical to inclined. Viewed along the length of the flat tubes, the heat exchange cores are arranged in a shape resembling a parallelogram. This inclined arrangement allows for a larger heat exchange area within a given installation space, improving heat exchange efficiency and enhancing the advantages of arranging heat exchangers in small spaces.

[0008] As an optimization, the flat tube has 2-5 inner holes, which can be square or rounded square holes. The right-angled edges of the inner holes are rounded, and the inner holes can be serrated or not.

[0009] In the aforementioned multi-layer assembled microchannel heat exchanger, the fixed structure includes a side plate and / or an end plate, the side of the heat exchange core is detachably connected to the side plate, and the manifold of the heat exchange core is detachably connected to the end plate.

[0010] The side plates are parallel to the flat tubes, connecting and fixing the heat exchange core from the side. The end plates are parallel to the manifolds, connecting and fixing the heat exchange core from both ends, ensuring the overall structural strength. Moreover, the connections between them are flexible and detachable, facilitating disassembly and maintenance.

[0011] In the aforementioned multi-layer assembled microchannel heat exchanger, a side plate is provided on the outer side of the flat tube assembly of the heat exchange core. The two ends of the side plate are fixedly connected to the ends of the manifold. A V-shaped connector is provided between the side plate and the side plate. The two sides of the V-shaped connector are detachably connected to the side plate and the side plate, respectively.

[0012] Side plates and flat tubes are arranged between the manifolds, with the side plates on the outside to protect the flat tubes. The included angle of the V-shaped connectors is adapted to the included angle between the side plates and the side plates, ensuring a stable connection between the side plates and the side plates. It also has flexible disassembly and is easy to assemble and disassemble. Of course, each side plate and the side plate are fixed together by three V-shaped connectors, making the connection secure.

[0013] In the aforementioned multi-layer assembled microchannel heat exchanger, a Y-shaped connector is provided between the end plate and the manifold. The arc-shaped part of the Y-shaped connector is attached to and fixed to the outer wall of the manifold, while the straight part is fixedly connected to the end plate.

[0014] The Y-shaped connector consists of an integrally connected arc-shaped part and a straight part. The arc surface of the arc-shaped part is attached to the outer wall of the manifold and fixed by welding or bonding, while the straight part is fixed to the inner side of the end plate to improve the overall structural strength.

[0015] In the aforementioned multi-layer assembled microchannel heat exchanger, the end plate is shaped as a parallelogram, trapezoid, or triangle, with the smaller interior angle of the parallelogram ranging from 30 to 75 degrees, and the length direction of the manifold is adapted to the length direction of the end plate.

[0016] The shape of the end plate is adapted to the arrangement of the heat exchange cores, preferably a parallelogram, with its two bases able to fit against the top and bottom surfaces of the mounting channel. The angle between the side and the base is between 30 and 75 degrees, with 45 degrees being preferred. This maximizes the heat exchange area while ensuring efficient airflow and heat exchange efficiency. Alternatively, a trapezoidal upper and lower base can fit against the top and bottom surfaces of the mounting channel, and the heat exchange cores can be arranged in parallel or non-parallel configurations. A triangular shape can also be used, with its base and apex connected to the top and bottom surfaces of the mounting channel. The heat exchange cores can be arranged in a pyramidal pattern, and the length of each core can be adjusted accordingly.

[0017] In the aforementioned multi-layer assembled microchannel heat exchanger, the manifolds of the heat exchange cores located on the outer sides of the arrangement direction are provided with transition components for connecting the inlet and outlet liquid pipes, and adjacent manifolds are connected by connecting components.

[0018] Each heat exchange core is connected in series, and the heat exchange medium flows between adjacent manifolds through connecting components. The manifold of the outermost heat exchange core is located at the beginning and end of this series path, and can be connected to the inlet and outlet liquid pipes through the adapter components to realize the input and output function of the heat exchange medium and ensure the continuous and stable operation of heat exchange.

[0019] In the aforementioned multi-layer assembled microchannel heat exchanger, the adapter assembly includes a tubular adapter base disposed on the manifold and a quick-connect connector disposed on the adapter base. One end of the quick-connect connector is inserted into and fixed to the opening of the adapter base, and the other end is provided with a threaded interface or a snap-fit ​​interface for connecting the inlet and outlet liquid pipes.

[0020] The adapter base is perpendicular to the manifold, and its cavity is connected to the manifold cavity. The inner end of the quick-connect fitting can be connected to the opening of the adapter base by welding or threading, while the outer end is provided with a threaded structure or snap-fit ​​interface, which can realize quick connection with the inlet and outlet pipes and has flexible disassembly.

[0021] In the aforementioned multi-layer assembled microchannel heat exchanger, the connecting component includes a T-shaped guide joint disposed on the manifold, the T-shaped guide joints of two adjacent manifolds are detachably connected and fixed together, and the connecting channels of the two T-shaped guide joints are connected together, the other end of the connecting channel being connected to the manifold cavity of the manifold.

[0022] The connecting component is specifically a T-shaped guide joint, which is set on the manifold and its connecting channel is connected to the manifold cavity. The T-shaped guide joints of adjacent manifolds are set accordingly, and the connecting surfaces of the two are attached to each other and fixed by bolts. It is flexible to disassemble and assemble, and the two connecting channels are connected to realize the flow of heat exchange medium between adjacent manifolds.

[0023] In the aforementioned multi-layer assembled microchannel heat exchanger, the manifold of the heat exchange core is fixedly connected to the end plate of the fixed structure. The end plate is provided with a connector window and an adapter through hole. The connector assembly is located inside the connector window. The connector window is covered with a cap-shaped cover plate. The cover plate is detachably fixed to the outer side of the end plate. The adapter base of the adapter assembly passes through the adapter through hole.

[0024] The connector window on the end plate is used to make way for the connecting components and also facilitates the disassembly and maintenance of the connecting components through this window. The cover plate is cap-shaped, and its concave area conforms to the protruding part of the connecting components, which can close the connector window, protect the internal structure, and reduce the ingress of dust and debris. The adapter through-hole is used to make way for the adapter base, and the adapter base passing through the adapter through-hole also has a certain positioning effect, which facilitates the assembly and fixation of the end plate and the heat exchange core.

[0025] In the aforementioned multi-layer assembled microchannel heat exchanger, the periphery of the end plate is bent outwards, and the bending height is adapted to the height of the cover plate.

[0026] The edge of the end plate is bent, and the bent part is perpendicular to the main body of the end plate. Its edge is flush with or higher than the top surface of the cover plate, which has a certain anti-collision function for the cover plate.

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

[0028] 1. This microchannel heat exchanger is assembled from multiple heat exchange cores, which are staggered and tilted to one side. The manifold changes from vertical to inclined. When viewed along the length of the flat tube, the heat exchange cores are arranged in a shape similar to a parallelogram. The inclined arrangement allows for a larger heat exchange area to be formed within a certain installation space, improving heat exchange efficiency and enhancing the advantages of arranging heat exchangers in small spaces.

[0029] 2. The side plates are parallel to the flat tubes, connecting and fixing the heat exchange core from the side. The end plates are parallel to the manifolds, connecting and fixing the heat exchange core from both ends, ensuring the overall structural strength. Moreover, the connections between them are flexible and detachable, facilitating disassembly and maintenance.

[0030] 3. The shape of the end plate is adapted to the arrangement of the heat exchange core, preferably a parallelogram. Its two bottom edges can be in contact with the top and bottom surfaces of the installation channel. The angle between the side edge and the bottom edge is between 30 and 75 degrees, with 45 degrees being preferred. This maximizes the heat exchange area and ensures the efficiency of air passage, thus guaranteeing the heat exchange efficiency.

[0031] 4. The heat exchange cores are connected in series, and the heat exchange medium flows between adjacent manifolds through connecting components. The manifold of the outermost heat exchange core is located at the beginning and end of the series path and can be connected to the inlet and outlet liquid pipes through the adapter components to realize the input and output function of the heat exchange medium and ensure the continuous and stable operation of heat exchange. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure provided by this utility model;

[0033] Figure 2This is a schematic diagram of the internal heat exchange core arrangement provided by this utility model;

[0034] Figure 3 This is a schematic diagram of the structure of the heat exchange core provided by this utility model;

[0035] Figure 4 This is a schematic diagram of the microchannel heat exchanger provided by this utility model installed in a confined space;

[0036] Figure 5 This is a schematic diagram of the end plate provided by this utility model;

[0037] Figure 6 This is a structural schematic diagram of the V-shaped connector and the Y-shaped connector provided by this utility model;

[0038] Figure 7 This is a structural schematic diagram of the quick-connect coupling (Example 1) provided by this utility model;

[0039] Figure 8 This is a schematic diagram of the structure of the cover plate provided by this utility model;

[0040] Figure 9 This is a structural schematic diagram of the quick-connect coupling (Example 2) provided by this utility model.

[0041] In the figure, heat exchange core 1, manifold 2, flat tube 3, fixed structure 4, side plate 5, end plate 6, side plate 7, V-shaped connector 8, Y-shaped connector 9, adapter assembly 13, connecting assembly 14, adapter base 15, quick-connect fitting 16, threaded interface 17, snap-fit ​​interface 18, guide joint 19, connector window 21, adapter through hole 22, cover plate 23. 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 1-8 As shown, this multi-layer assembled microchannel heat exchanger includes a heat exchange core 1, which includes two parallel manifolds 2 and a set of flat tubes 3 connected between the two manifolds 2. The heat exchange core 1 is arranged in four layers, and the multiple sets of heat exchange cores 1 are arranged in a stepped staggered manner along the length of the manifolds 2. The heat exchange cores 1 are connected to each other by a fixing structure 4.

[0045] Specifically, this microchannel heat exchanger is assembled from multiple heat exchange cores 1. Each heat exchange core 1 consists of a manifold 2 and flat tubes 3 arranged in parallel to form a group of flat tubes 3. A manifold 2 contains a manifold cavity, and a flat tube 3 contains a microchannel. The microchannel and the manifold cavity are connected. The heat exchange medium flows from one manifold 2 through the flat tube 3 to another manifold 2. During this process, the flat tube 3 contacts the air to achieve heat exchange. Fins are also provided on the flat tube 3 to improve heat exchange efficiency. In addition, the heat exchange cores 1 are staggered, which is equivalent to tilting the heat exchange cores 1 to one side. The manifold 2 changes from vertical to inclined. Viewed along the length of the flat tube 3, the heat exchange cores 1 are arranged in a shape similar to a parallelogram. The inclined arrangement allows for a larger heat exchange area to be formed within a certain installation space, improving heat exchange efficiency and enhancing the advantage of arranging heat exchangers in small spaces.

[0046] In this embodiment, the flat tube 3 has 5 microchannel inner holes, which are arc-shaped square holes with rounded right-angled edges.

[0047] like Figure 1 , 2 As shown in Figures 6 and 7, the fixed structure 4 includes a side plate 5 and an end plate 6. The side of the heat exchange core 1 is detachably connected to the side plate 5, and the manifold 2 of the heat exchange core 1 is detachably connected to the end plate 6. A side plate 7 is provided on the outer side of the flat tube group 3 of the heat exchange core 1. The two ends of the side plate 7 are fixedly connected to the ends of the manifold 2. A V-shaped connector 8 is provided between the side plate 7 and the side plate 5, and the two sides of the V-shaped connector 8 are detachably connected to the side plate 7 and the side plate 5, respectively. The end plate 6 is parallelogram-shaped, with a smaller interior angle of 45 degrees. The length direction of the manifold 2 is adapted to the length direction of the end plate 6. A Y-shaped connector 9 is provided between the end plate 6 and the manifold 2. The arc-shaped part of the Y-shaped connector 9 is attached to and fixed to the outer wall of the manifold 2, and the straight part is fixedly connected to the end plate 6.

[0048] Specifically, the side plate 5 is parallel to the flat tube 3, connecting and fixing the heat exchange core 1 from the side. The end plate 6 is parallel to the manifold 2, connecting and fixing the heat exchange core 1 from both ends, ensuring the overall structural strength. Furthermore, all connections are flexible and detachable, facilitating disassembly and maintenance. The side plate 7 and flat tube 3 are arranged between the manifold 2, with the side plate 7 located on the outside to protect the flat tube 3. The included angle of the V-shaped connector 8 is adapted to the included angle between the side plate 7 and the side plate 5, ensuring a stable connection between the side plate 5 and the side plate 7, and providing flexible detachability for easy assembly and disassembly. Each side plate 7 and side plate 5 is fixed by three V-shaped connectors 8, ensuring a secure connection. The Y-shaped connector 9 consists of an integrally connected arc-shaped part and a straight part. The arc surface of the arc-shaped part is attached to the outer wall of the manifold 2 and fixed by welding, while the straight part is welded and fixed to the inner side of the end plate 6, improving the overall structural strength.

[0049] like Figure 1 ,2 As shown in Figure 3, the heat exchange cores 1 located on the outer sides of the arrangement direction have a manifold 2 with a connecting assembly 13 for connecting the inlet and outlet liquid pipes. Adjacent manifolds 2 are connected by a connecting assembly 14. The connecting assembly 13 includes a tubular connecting base 15 on the manifold 2 and a quick-connect connector 16 on the connecting base 15. One end of the quick-connect connector 16 is inserted into and fixed to the opening of the connecting base 15, and the other end has a threaded interface 17 for connecting the inlet and outlet liquid pipes. The connecting assembly 14 includes a T-shaped guide connector 19 on the manifold 2. The guide connectors 19 of two adjacent manifolds 2 are detachably connected and fixed together, and the connecting channels of the two guide connectors 19 are connected together. The other end of the connecting channel is connected to the manifold cavity of the manifold 2.

[0050] Specifically, the heat exchange cores 1 are connected in series, and the heat exchange medium flows between adjacent manifolds 2 through a connecting assembly 14. The manifold 2 of the outermost heat exchange core 1 is located at the beginning and end of this series path and can be connected to the inlet and outlet liquid pipes through a transition assembly 13 to realize the input and output function of the heat exchange medium and ensure continuous and stable heat exchange. The transition base 15 is perpendicular to the manifold 2, and its cavity is connected to the manifold cavity of the manifold 2. The inner end of the quick-connect connector 16 is welded to the opening of the transition base 15, and the outer end is provided with a snap-fit ​​interface 18, which can realize quick connection with the inlet and outlet liquid pipes and has flexible disassembly. The connecting assembly 14 is specifically a T-shaped guide connector 19, which is set on the manifold 2 and its connecting channel is connected to the manifold cavity. The guide connectors 19 of adjacent manifolds 2 are correspondingly set, and the connecting surfaces of the two are attached and fixed by bolts, which is flexible for disassembly and assembly. The two connecting channels are connected to realize the flow of heat exchange medium between adjacent manifolds 2.

[0051] As an optimization of this embodiment, the manifold 2 of the heat exchange core 1 is fixedly connected to the end plate 6 of the fixed structure 4. The end plate 6 is provided with a connector window 21 and an adapter through hole 22. The connecting assembly 14 is located inside the connector window 21. A cap-shaped cover plate 23 is provided on the connector window 21. The cover plate 23 is detachably fixed to the outer side of the end plate 6. The adapter base 15 of the adapter assembly 13 passes through the adapter through hole 22. The periphery of the end plate 6 is bent outward, and the bending height is adapted to the height of the cover plate 23.

[0052] Specifically, the connector window 21 on the end plate 6 is used to make way for the connecting assembly 14, and also facilitates the disassembly and maintenance of the connecting assembly 14 through this window. The cover plate 23 is cap-shaped, and its concave area is adapted to the protruding part of the connecting assembly 14, which can close the connector window 21, protect the internal structure and reduce the entry of dust and debris. The adapter through hole 22 is used to make way for the adapter base 15. At the same time, the adapter base 15 passing through the adapter through hole 22 also has a certain positioning effect, which facilitates the assembly and fixation of the end plate 6 and the heat exchange core 1. The edge of the end plate 6 is bent. This bent part is perpendicular to the main body of the end plate 6, and its edge is flush with or higher than the top surface of the cover plate 23, which has a certain anti-collision function for the cover plate 23.

[0053] Specific working principle: When installed in a channel with a rectangular cross-section, for example, the two side plates 5 are parallel and attached to the top and bottom surfaces of the channel, respectively, and the end plate 6 is parallel to the side wall of the channel. During operation, the heat exchange medium enters the manifold 2 through one of the inlet / outlet pipes via the quick-connect fitting 16 and the adapter base 15. The heat exchange medium flows into the opposite manifold 2 through the flat tube 3, and then into the adjacent manifold 2 through the guide fitting 19. Similarly, it flows between the heat exchange cores 1, and finally exits from the other inlet / outlet pipe. During the flow of the heat exchange medium, especially within the flat tube 3, air exchanges heat with the heat exchange medium in the microchannel through the tube wall of the flat tube 3 to achieve temperature control.

[0054] Example 2

[0055] The working principle of this embodiment is basically the same as that of embodiment 1, except that the quick-connect connector 16 is different.

[0056] Specific implementation examples Figure 9 As shown, the outer end of the quick-connect fitting 16 is provided with a threaded interface 17 for connecting the inlet and outlet liquid pipes.

[0057] 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 assembled microchannel heat exchanger, comprising a heat exchange core (1), wherein the heat exchange core (1) comprises two parallel manifolds (2) and a plurality of flat tubes (3) connected between the two manifolds (2), characterized in that, The heat exchange cores (1) are arranged in layers in at least two groups. Multiple heat exchange cores (1) are arranged in a staggered manner in the length direction of the manifold (2). The heat exchange cores (1) are connected by a fixed structure (4).

2. The multi-layer assembled microchannel heat exchanger according to claim 1, characterized in that, The fixed structure (4) includes a side plate (5) and / or an end plate (6). The side of the heat exchange core (1) is detachably connected to the side plate (5), and the manifold (2) of the heat exchange core (1) is detachably connected to the end plate (6).

3. The multi-layer assembled microchannel heat exchanger according to claim 2, characterized in that, The heat exchange core (1) has a side plate (7) on the outside of the flat tube (3) group. The two ends of the side plate (7) are fixedly connected to the ends of the manifold (2). A V-shaped connector (8) is provided between the side plate (7) and the side plate (5). The two sides of the V-shaped connector (8) are detachably connected to the side plate (7) and the side plate (5) respectively.

4. The multi-layer assembled microchannel heat exchanger according to claim 2, characterized in that, A Y-shaped connector (9) is provided between the end plate (6) and the manifold (2). The arc-shaped part of the Y-shaped connector (9) is attached to and fixed to the outer wall of the manifold (2), and the straight part is fixedly connected to the end plate (6).

5. The multi-layer assembled microchannel heat exchanger according to claim 2, characterized in that, The end plate (6) is in the shape of a parallelogram, trapezoid, or triangle. The smaller interior angle of the parallelogram is between 30 and 75 degrees. The length direction of the manifold (2) is adapted to the length direction of the end plate (6).

6. The multi-layer assembled microchannel heat exchanger according to claim 1, characterized in that, The heat exchange core (1) located on both outer sides of the arrangement direction has a transfer assembly (13) for connecting the inlet and outlet liquid pipes on its manifold (2). Adjacent manifolds (2) are connected by a connecting assembly (14).

7. The multi-layer assembled microchannel heat exchanger according to claim 6, characterized in that, The adapter assembly (13) includes a tubular adapter base (15) disposed on the manifold (2) and a quick-connect connector (16) disposed on the adapter base (15). One end of the quick-connect connector (16) is inserted into and fixed to the opening of the adapter base (15), and the other end is provided with a threaded interface (17) or a snap-fit ​​interface (18) for connecting the inlet and outlet pipes.

8. The multi-layer assembled microchannel heat exchanger according to claim 6, characterized in that, The connection component (14) includes a T-shaped guide (19) disposed on the manifold (2). The T-shaped guides (19) of two adjacent manifolds (2) are detachably connected and fixed together, and the connecting channels of the two T-shaped guides (19) are connected together. The other end of the connecting channel is connected to the manifold cavity of the manifold (2).

9. The multi-layer assembled microchannel heat exchanger according to claim 6, characterized in that, The heat exchange core (1) has a manifold (2) that is fixedly connected to the end plate (6) of the fixed structure (4). The end plate (6) is provided with a connector window (21) and a transition hole (22). The connecting component (14) is located inside the connector window (21). The connector window (21) is covered with a cap-shaped cover plate (23). The cover plate (23) is detachably fixed to the outer side of the end plate (6). The transition base (15) of the transition component (13) passes through the transition hole (22).

10. The multi-layer assembled microchannel heat exchanger according to claim 9, characterized in that, The periphery of the end plate (6) is bent outward, and the bending height is adapted to the height of the cover plate (23).

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