Thin-wall micro-channel heat exchanger

Abstract

The utility model discloses a thin-wall micro-channel heat exchanger, which belongs to the technical field of micro-channel heat exchangers and comprises a heat exchanger main body with a cylindrical structure, first flow channel ports are arranged at two axial ends of the heat exchanger main body, second flow channel ports are arranged on the side surface of the heat exchanger main body, and the first flow channel ports and the second flow channel ports are arranged at intervals. A turbulent flow boss is arranged in the first fluid channel between the first flow channel openings, and the cross section of the turbulent flow boss is of an oval structure; the interior of the second fluid channel between the second flow channel openings is divided into multiple layers of structures, each layer is provided with a plurality of sets of wave-shaped flow channel wall faces, and the flow channel wall faces of the middle set are evenly provided with a plurality of flow disturbing fins extending in the axial direction. The heat exchanger is low in cost, high in production and manufacturing efficiency, good in heat exchange performance, capable of enhancing the heat exchange effect, convenient to install, beneficial to modular integration of a system, and convenient to test, verify and platform application of the heat exchanger.

Description

Technical Field

[0001] This utility model relates to the field of microchannel heat exchanger technology, specifically to a thin-walled microchannel heat exchanger. Background Technology

[0002] Microchannel heat exchangers can be categorized into micro-microchannel heat exchangers and large-scale microchannel heat exchangers based on their external dimensions. Large-scale microchannel heat exchangers are primarily used in traditional industrial refrigeration, waste heat recovery, automotive air conditioning, household air conditioning, and heat pump water heaters. The hydraulic diameter of the microchannels is less than 0.6-1 mm, hence the name large-scale microchannel heat exchangers. In recent years, the integration of various industrial products has increased, and equipment size has decreased. Ordinary heat exchangers can no longer meet the corresponding heat exchange requirements. Microchannel heat exchangers, with their high refrigeration efficiency, small size, light weight, and strong pressure resistance, are becoming increasingly important in the market. With advancements in microfabrication technology, highly efficient micro-heat exchangers with channel depths ranging from a few micrometers to hundreds of micrometers can be fabricated. These microfabrication technologies include lithography, chemical etching, photolithography electroforming injection molding (LIGA), diamond cutting, wire cutting, and ion beam processing. However, these microfabrication technologies are costly, inefficient, and difficult to fabricate complex microchannels.

[0003] Traditional microchannel heat exchangers utilize high-cost and low-efficiency microfabrication technologies, hindering large-scale industrial production and applications. Furthermore, the development and verification process for microchannel heat exchangers is lengthy and costly; failure to pass verification necessitates redesign, remanufacturing, and retesting. The complex microchannels are also difficult to fabricate, preventing the heat exchanger from reaching its full potential. Additionally, traditional microchannel heat exchangers have complete inlet / outlet structures, cores, and shells, requiring assembly before system integration, which is inconvenient. Utility Model Content

[0004] The purpose of this invention is to provide a thin-walled microchannel heat exchanger that solves the problems of high processing cost and low efficiency of microchannel heat exchanger technology, which is not conducive to large-scale industrial production and application, and requires assembly for installation in the system, which is not convenient for system integration.

[0005] Technical Solution: This utility model provides a thin-walled microchannel heat exchanger, comprising: a cylindrical heat exchanger body, with first flow channels at both axial ends and second flow channels on the side, the first and second flow channels being spaced apart; a turbulence-inducing protrusion within a first fluid channel between the first flow channels, the turbulence-inducing protrusion having an elliptical cross-section; and a multi-layered structure within a second fluid channel between the second flow channels, each layer having a wavy flow channel wall, the flow channel wall having several groups, with multiple axially extending turbulence-inducing fins evenly distributed on the middle group of flow channel walls. The turbulence-inducing protrusions within the first fluid channel prolong the heat exchange time between the two fluids, disrupt the fluid boundary layer, and enhance the heat exchange effect; the multi-layered wavy curve structure of the flow channel walls within the second fluid channel, with each layer having a wavy flow channel wall, further improves the heat exchange effect.

[0006] Furthermore, in the aforementioned thin-walled microchannel heat exchanger, the main body of the heat exchanger is designed and manufactured in an integrated manner using additive manufacturing technology. This integrated additive manufacturing process results in low cost, eliminates the need for additional component assembly and welding processes, and significantly improves manufacturing efficiency.

[0007] Furthermore, in the aforementioned thin-walled microchannel heat exchanger, protruding annular connecting rings are provided on the outer sides of both axial ends of the heat exchanger body. A sealing groove is provided on the outer side of the connecting ring, and a sealing ring is installed within the sealing groove. The connecting rings and sealing rings are directly assembled into the pipe, which is convenient and quick.

[0008] Furthermore, in the aforementioned thin-walled microchannel heat exchanger, the turbulence protrusions are evenly arranged in several rows, with the turbulence protrusions in each row being staggered.

[0009] Furthermore, in the aforementioned thin-walled microchannel heat exchanger, the flow channel wall divides the second fluid channel into layers, with the hydraulic diameter of each layer of the flow channel being between 0.45 and 1.0 mm.

[0010] Furthermore, in the aforementioned thin-walled microchannel heat exchanger, the second fluid channel has only one set of flow channel walls on the outermost two sides of the heat exchanger body, and the wall height is consistent with the outer diameter of the heat exchanger body. This ensures that all fluid entering from the second flow channel opening passes through the second fluid channel.

[0011] Furthermore, in the aforementioned thin-walled microchannel heat exchanger, the flow channel wall is provided in 3 sets inside the heat exchanger body, with the two sets of flow channel walls on both sides symmetrically distributed and staggered from the flow channel wall in the middle.

[0012] Furthermore, in the aforementioned thin-walled microchannel heat exchanger, the main body structure is designed using parametric structural design to enable rapid iterative design and manufacturing, and to meet different heat exchange requirements by modifying the corresponding parameters.

[0013] Furthermore, in the aforementioned thin-walled microchannel heat exchanger, the inlet and outlet of the first flow channel are completely identical, and the inlet and outlet of the second flow channel are also completely identical. During installation, there is no need to distinguish between the forward and reverse directions of the microchannel heat exchanger, which facilitates installation and promotes modular integration of the system.

[0014] As can be seen from the above technical solution, this utility model has the following beneficial effects: The thin-walled microchannel heat exchanger described in this utility model is integrally manufactured using a mature and stable additive manufacturing process, which greatly reduces material costs and processing and assembly costs; there are no additional parts assembly and welding processes, which greatly improves production efficiency and heat exchange performance; the hydraulic diameter of the fluid in the second fluid channel is between 0.45 and 1.0 mm, and the channel wall adopts a spline wave-shaped curve structure, with turbulence fins set in the middle of each channel; each fluid in the first fluid channel is provided with turbulence protrusions, which prolong the heat exchange time between the two fluids, destroy the fluid boundary layer, and enhance the heat exchange effect; the inlet and outlet of the first fluid and the second fluid are completely consistent, so there is no need to distinguish the forward and reverse directions of the microchannel heat exchanger during installation, which is convenient for installation and facilitates modular integration of the system; the shape and channel size of the heat exchanger adopt a parametric structural design, which facilitates the testing and verification of the heat exchanger and its platform application. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of a thin-walled microchannel heat exchanger according to the present invention;

[0016] Figure 2 This is a schematic diagram of the cross-section of the first fluid channel of this utility model;

[0017] Figure 3 This is a schematic diagram of the cross-section of the second fluid channel of this utility model.

[0018] In the figure: heat exchanger body 1, first flow channel opening 2, second flow channel opening 3, connecting ring 4, turbulence boss 21, flow channel wall 31, turbulence fins 32, sealing groove 41, sealing ring 42. Detailed Implementation

[0019] Example 1

[0020] like Figure 1-3A thin-walled microchannel heat exchanger is shown, comprising: a cylindrical heat exchanger body 1, with first flow channels 2 at both axial ends and second flow channels 3 on the sides, the first and second flow channels 2 and 3 being spaced apart; a first fluid channel between the first flow channels 2 having a turbulence-inducing protrusion 21 with an elliptical cross-section; and a second fluid channel between the second flow channels 3 having a multi-layered structure, each layer having a wavy flow channel wall 31, the flow channel wall 31 having several groups, with multiple axially extending turbulence-inducing fins 32 evenly distributed on the middle group of flow channel wall 31. The turbulence-inducing protrusions 21 in the first fluid channel prolong the heat exchange time between the two fluids, disrupt the fluid boundary layer, and enhance the heat exchange effect; the multi-layered wavy flow channel wall 31 in the second fluid channel, with each layer having a wavy flow channel wall 31, further improves the heat exchange effect.

[0021] In this embodiment, the heat exchanger body 1 is designed and manufactured in one piece using additive manufacturing technology. This integrated additive manufacturing process reduces costs, eliminates the need for additional component assembly and welding processes, and significantly improves manufacturing efficiency.

[0022] like Figure 1 The diagram illustrates a thin-walled microchannel heat exchanger. The heat exchanger body 1 has protruding annular connecting rings 4 on the outer sides of both axial ends. A sealing groove 41 is provided on the outer side of the connecting ring 4, and a sealing ring 42 is disposed within the sealing groove 41. The connecting rings 4 and sealing rings 42 are directly assembled into the pipe, which is convenient and quick.

[0023] In this embodiment, the inlet and outlet of the first flow channel 2 are completely identical, and the inlet and outlet of the second flow channel 3 are completely identical. During installation, there is no need to distinguish between the forward and reverse directions of the microchannel heat exchanger, which facilitates installation and promotes modular integration of the system.

[0024] Example 2

[0025] Based on Example 1, in this example, as... Figure 2 The thin-walled microchannel heat exchanger shown has several rows of turbulence protrusions 21 evenly arranged, with the turbulence protrusions 21 in each row being staggered.

[0026] like Figure 3 The diagram illustrates a thin-walled microchannel heat exchanger where the flow channel wall 31 divides the second fluid channel into layers, with each layer having a hydraulic diameter between 0.45 and 1.0 mm. Only one set of flow channel walls 31 is provided on the outermost sides of the heat exchanger body 1, and the wall height is consistent with the outer diameter of the heat exchanger body 1. This ensures that all fluid entering from the second flow channel opening 3 passes through the second fluid channel.

[0027] In this embodiment, the flow channel wall 31 is provided in 3 sets inside the heat exchanger body 1. The two sets of flow channel wall 31 on both sides are symmetrically distributed and staggered from the flow channel wall 31 in the middle.

[0028] In this embodiment, the heat exchanger body 1 is designed with parametric structural dimensions to enable rapid iterative design and manufacturing, and to meet different heat exchange requirements by modifying the corresponding parameters.

[0029] It should be noted that the above description is merely a technical solution of the utility model and not a limitation. Although the present utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solution of the utility model without departing from the scope of the present utility model, and all such modifications and substitutions should be covered within the scope of the claims of the present utility model.

Claims

1. A thin-walled microchannel heat exchanger, characterized in that: include: The heat exchanger body (1) has a cylindrical structure. The heat exchanger body (1) has a first flow channel (2) at both ends of the axial direction and a second flow channel (3) on the side. The first flow channel (2) and the second flow channel (3) are spaced apart. A turbulence boss (21) is provided in the first fluid channel between the first flow channel (2). The cross-section of the turbulence boss (21) is elliptical. The second fluid channel between the second flow channel (3) is divided into multiple layers. Each layer is provided with a wave-shaped flow channel wall (31). The flow channel wall (31) is provided with several groups. Multiple axially extending turbulence fins (32) are uniformly provided on the flow channel wall (31) of the middle group.

2. The thin-walled microchannel heat exchanger according to claim 1, characterized in that: The heat exchanger body (1) is designed and manufactured in an integrated manner using additive manufacturing technology.

3. A thin-walled microchannel heat exchanger according to claim 1, characterized in that: The heat exchanger body (1) has protruding annular connecting rings (4) on the outer sides of both axial ends. The connecting rings (4) have sealing grooves (41) on the outer side and sealing rings (42) are provided in the sealing grooves (41).

4. A thin-walled microchannel heat exchanger according to claim 1, characterized in that: The turbulence protrusions (21) are evenly arranged in several rows, and the turbulence protrusions (21) in each row are staggered.

5. A thin-walled microchannel heat exchanger according to claim 1, characterized in that: The flow channel wall (31) divides the second fluid channel into layers, with the hydraulic diameter of each layer of the flow channel being between 0.45 and 1.0 mm.

6. A thin-walled microchannel heat exchanger according to claim 1, characterized in that: The second fluid channel has only one set of flow channel walls (31) on the outermost two sides of the heat exchanger body (1), and the height of the walls is consistent with the outer diameter of the heat exchanger body (1).

7. A thin-walled microchannel heat exchanger according to claim 1, characterized in that: The flow channel wall (31) is provided in 3 sets inside the heat exchanger body (1). The two sets of flow channel wall (31) on both sides are symmetrically distributed and staggered from the flow channel wall (31) in the middle.

8. A thin-walled microchannel heat exchanger according to claim 1, characterized in that: The heat exchanger body (1) is designed with parametric structural dimensions to enable rapid iterative design and manufacturing, and to meet different heat exchange requirements by modifying the corresponding parameters.

9. A thin-walled microchannel heat exchanger according to claim 1, characterized in that: The inlet and outlet of the first flow channel (2) are completely consistent, and the inlet and outlet of the second flow channel (3) are completely consistent.

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