Thin-wall micro-channel heat exchanger

Abstract

The invention 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 and convenient to install, modular integration of the system is facilitated, and test verification and platform application of the heat exchanger are facilitated.

Description

Technical Field

[0001] The invention relates to the technical field of microchannel heat exchangers, and in particular to a thin-wall microchannel heat exchanger. Background Art

[0002] Microchannel heat exchangers can be divided into micro-microchannel heat exchangers and large-scale microchannel heat exchangers according to their external dimensions. Large-scale microchannel heat exchangers are mainly used in traditional industrial refrigeration, waste heat utilization, automotive air conditioning, household air conditioning, heat pump water heaters, etc. The hydraulic diameter of the microchannel is below 0.6~1mm, so it is called a large-scale microchannel heat exchanger. In recent years, the integration of various industrial products has become higher and higher, and the size of the equipment has become smaller and smaller. Ordinary heat exchangers can no longer meet the corresponding heat exchange needs. Microchannel heat exchangers have the characteristics of high refrigeration efficiency, small size, light weight, and strong pressure resistance. Its market use is becoming more and more important. With the improvement of micromachining technology, efficient micro heat exchangers with a flow channel depth ranging from a few microns to hundreds of microns can be processed. Such micromachining technologies include lithography, chemical etching technology, photolithography electroforming injection molding technology (LIGA), diamond cutting technology, wire cutting and ion beam processing technology. These micromachining technologies are costly, inefficient, and difficult to process complex microchannels.

[0003] The micro-machining technology used in traditional microchannel heat exchangers is costly and inefficient, which is not conducive to large-scale industrial production and application. In addition, the development and verification process of microchannel heat exchangers is long and costly. If the development and verification are unqualified, they need to be redesigned, processed and manufactured, and then retested and verified. It is also difficult to process complex microchannels, resulting in the heat exchange efficiency of the heat exchanger not being fully utilized. In addition, traditional microchannel heat exchangers have complete inlets and outlets, cores, shells, etc., and need to be installed and applied to the system through assembly, which is not convenient for system integration. Summary of the invention

[0004] The purpose of the present invention is to provide a thin-walled microchannel heat exchanger to solve the problems of high cost and low efficiency of microchannel heat exchanger processing technology, which is not conducive to large-scale industrial production and application, needs to be installed and applied in the system through assembly, and is not convenient for system integration.

[0005] Technical solution: The present invention provides a thin-walled microchannel heat exchanger, comprising: a heat exchanger body of cylindrical structure, wherein the first flow channel openings are arranged at both axial ends of the heat exchanger body, and the second flow channel openings are arranged on the side, the first flow channel openings and the second flow channel openings are arranged at intervals, and a spoiler boss is arranged in the first fluid channel between the first flow channel openings, and the cross section of the spoiler boss is an elliptical structure; the second fluid channel between the second flow channel openings is divided into a multi-layer structure, each layer is provided with a wavy flow channel wall surface, and the flow channel wall surface is provided with a plurality of groups, and a plurality of axially extending spoiler fins are evenly arranged on the flow channel wall surface of the middle group. The spoiler boss is arranged in the first fluid channel to extend the heat exchange time between the two fluids, destroy the boundary layer of the fluid, and enhance the heat exchange effect. The second fluid channel is provided with a multi-layer wavy curved flow channel wall surface, and each layer is provided with a wavy flow channel wall surface to improve the heat exchange effect.

[0006] Furthermore, in the above-mentioned thin-walled microchannel heat exchanger, the heat exchanger body is designed and manufactured in an integrated manner using an additive manufacturing process. The integrated manufacturing process using additive manufacturing has low cost and does not require additional parts assembly and welding processes, greatly improving production efficiency.

[0007] Furthermore, in the above-mentioned thin-walled microchannel heat exchanger, protruding annular connecting rings are arranged on the outer sides of the two axial ends of the heat exchanger body, a sealing groove is arranged on the outer side of the connecting ring, and a sealing ring is arranged in the sealing groove. The connecting ring and the sealing ring are directly assembled in the pipeline, which is convenient and quick.

[0008] Furthermore, in the above-mentioned thin-wall microchannel heat exchanger, the spoiler bosses are evenly arranged in a plurality of rows, and the spoiler bosses in each row are staggered.

[0009] Furthermore, in the above-mentioned thin-wall microchannel heat exchanger, the channel wall divides the second fluid channel into layers, and the hydraulic diameter in each layer of the channel is between 0.45-1.0 mm.

[0010] Furthermore, in the above-mentioned thin-walled microchannel heat exchanger, the second fluid channel is provided with only one set of channel walls on the outermost sides of the heat exchanger body, and the wall height is consistent with the outer diameter of the heat exchanger body, so as to ensure that the fluid entering from the second channel port passes through the second fluid channel.

[0011] Furthermore, in the above-mentioned thin-walled microchannel heat exchanger, the flow channel wall surfaces are provided with three groups inside the heat exchanger body, and the two groups of flow channel wall surfaces arranged on both sides are symmetrically distributed and staggered with the middle flow channel wall surface.

[0012] Furthermore, in the above-mentioned thin-walled microchannel heat exchanger, the main body design structure dimensions of the heat exchanger adopt a parametric structural design to facilitate rapid iterative design and rapid manufacturing, and to meet different heat exchange requirements by modifying corresponding parameters to match the requirements.

[0013] Furthermore, in the above-mentioned thin-walled microchannel heat exchanger, the inlet and outlet of the first flow channel are completely consistent, and the inlet and outlet of the second flow channel are completely consistent. It is not necessary to distinguish the forward and reverse directions of the microchannel heat exchanger during installation, which is convenient for installation and conducive to modular integration of the system.

[0014] It can be seen from the above technical scheme that the present invention has the following beneficial effects: a thin-walled microchannel heat exchanger described in the present invention is integrally manufactured by a mature and stable additive manufacturing process, and the material cost and the processing and assembly manufacturing cost are greatly reduced; there is no additional parts assembly and welding process, the production efficiency is greatly improved, the heat exchange performance is good, the flow channel hydraulic diameter of the fluid in the second fluid channel is between 0.45 and 1.0 mm, and the flow channel wall surface adopts a spline wavy curve structure, and a spoiler fin is arranged in the middle of each flow channel; a spoiler boss is arranged in each flow channel of the fluid in the first fluid channel, which prolongs the heat exchange time between the two fluids, destroys the boundary layer of the fluid, and enhances the heat exchange effect; the inlet and outlet of the first fluid and the second fluid are completely consistent, and there is no need to distinguish the forward and reverse directions of the microchannel heat exchanger during installation, which is convenient for installation and conducive to modular integration of the system. The shape and flow channel size of the heat exchanger adopt a parametric structural design, which is convenient for testing, verification and platform application of the heat exchanger. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the structure of a thin-wall microchannel heat exchanger of the present invention; Figure 2 is a schematic cross-sectional view of a first fluid channel of the present invention; Figure 3 Schematic diagram of the cross section of the second fluid channel of the present invention.

[0016] In the figure: a heat exchanger body 1 , a first flow channel opening 2 , a second flow channel opening 3 , a connecting ring 4 , a spoiler boss 21 , a flow channel wall 31 , a spoiler fin 32 , a sealing groove 41 , and a sealing ring 42 . DETAILED DESCRIPTION

[0017] Example 1 like Figure 1-3A thin-walled microchannel heat exchanger shown in the figure comprises: a heat exchanger body 1 of a cylindrical structure, wherein first flow channel openings 2 are arranged at both axial ends of the heat exchanger body 1, and second flow channel openings 3 are arranged on the side, wherein the first flow channel openings 2 and the second flow channel openings 3 are arranged at intervals, and a spoiler boss 21 is arranged in the first fluid channel between the first flow channel openings 2, and the cross section of the spoiler boss 21 is an elliptical structure; the second fluid channel between the second flow channel openings 3 is divided into a multi-layer structure, each layer is provided with a wavy flow channel wall surface 31, and the flow channel wall surface 31 is provided with a plurality of groups, and a plurality of axially extending spoiler fins 32 are evenly arranged on the flow channel wall surface 31 of the middle group. The spoiler boss 21 is arranged in the first fluid channel to extend the heat exchange time between the two fluids, destroy the boundary layer of the fluid, and enhance the heat exchange effect, and the second fluid channel is provided with a multi-layer wavy curved flow channel wall surface 31, and each layer is provided with a wavy flow channel wall surface 31, so as to improve the heat exchange effect.

[0018] In this embodiment, the heat exchanger body 1 is designed and manufactured in an integrated manner using an additive manufacturing process. The additive manufacturing process is integrated and has low cost, no additional parts assembly and welding processes, and greatly improves production efficiency.

[0019] like Figure 1 A thin-walled microchannel heat exchanger is shown, wherein protruding annular connecting rings 4 are arranged on the outer sides of the two axial ends of the heat exchanger body 1, and a sealing groove 41 is arranged on the outer side of the connecting ring 4, and a sealing ring 42 is arranged in the sealing groove 41. The connecting ring 4 and the sealing ring 42 are directly assembled in the pipeline, which is convenient and quick.

[0020] In this embodiment, the inlet and outlet of the first flow channel opening 2 are completely consistent, and the inlet and outlet of the second flow channel opening 3 are completely consistent. It is not necessary to distinguish the forward and reverse directions of the microchannel heat exchanger during installation, which is convenient for installation and conducive to modular integration of the system.

[0021] Example 2 On the basis of Example 1, in this example, Figure 2 In the thin-walled microchannel heat exchanger shown, the spoiler bosses 21 are evenly arranged in a plurality of rows, and the spoiler bosses 21 in each row are staggered.

[0022] like Figure 3 In the thin-walled microchannel heat exchanger shown, the flow channel wall surface 31 divides the second fluid channel into layers, and the hydraulic diameter in each layer of the flow channel is between 0.45-1.0 mm; the second fluid channel is provided with only one set of flow channel wall surfaces 31 on the outermost sides of the heat exchanger body 1, and the wall surface height is consistent with the outer diameter of the heat exchanger body 1. It is ensured that the fluid entering from the second flow channel opening 3 passes through the second fluid channel.

[0023] In this embodiment, three groups of the flow channel walls 31 are provided inside the heat exchanger body 1 , and the two groups of flow channel walls 31 on both sides are symmetrically distributed and staggered with the middle flow channel wall 31 .

[0024] In this embodiment, the design structure and dimensions of the heat exchanger body 1 are designed using parametric structure design to facilitate rapid iterative design and rapid manufacturing, and to meet different heat exchange requirements by modifying corresponding parameters to match the requirements.

[0025] It should be noted that the above is only a technical solution of the invention and not a limitation. Although the present invention is described in detail with reference to the preferred embodiments, a person skilled in the art should understand that the technical solution of the invention can be modified or replaced by equivalents without departing from the scope of the technical solution of the present invention, which should be included in the scope of the claims of the present invention.

Claims

1. A thin-wall microchannel heat exchanger, characterized in that: include: A heat exchanger body (1) of cylindrical structure, wherein first flow channel openings (2) are arranged at both axial ends of the heat exchanger body (1), and second flow channel openings (3) are arranged on the side, the first flow channel openings (2) and the second flow channel openings (3) are arranged at intervals, a spoiler boss (21) is arranged in the first fluid channel between the first flow channel openings (2), and the cross section of the spoiler boss (21) is an elliptical structure; the second fluid channel between the second flow channel openings (3) is divided into a multi-layer structure, each layer is provided with a wavy flow channel wall surface (31), the flow channel wall surface (31) is provided with a plurality of groups, and a plurality of axially extending spoiler fins (32) are evenly arranged on the flow channel wall surface (31) of the middle group, and the flow channel wall surface (31) is provided with three groups inside the heat exchanger body (1), and the two groups of flow channel wall surfaces (31) arranged on both sides are symmetrically distributed and spaced apart from the middle flow channel wall surface (31).

2. A 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 an additive manufacturing process.

3. A thin-walled microchannel heat exchanger according to claim 1, characterized in that: Protruding annular connecting rings (4) are arranged on the outer sides of the two axial ends of the heat exchanger body (1), a sealing groove (41) is arranged on the outer side of the connecting ring (4), and a sealing ring (42) is arranged in the sealing groove (41).

4. The thin-walled microchannel heat exchanger according to claim 1, characterized in that: The spoiler convex platforms (21) are evenly arranged in a plurality of rows, and the spoiler convex platforms (21) in each row are arranged in a staggered manner.

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

6. The thin-wall microchannel heat exchanger according to claim 1, characterized in that: The second fluid channel is provided with only one set of channel wall surfaces (31) on the outermost sides of the heat exchanger body (1), and the wall surface height is consistent with the outer diameter of the heat exchanger body (1).

7. The thin-wall microchannel heat exchanger according to claim 1, characterized in that: The design structure and dimensions of the heat exchanger body (1) are designed using parameterized structural design, so as to facilitate rapid iterative design and rapid manufacturing, and to meet different heat exchange requirements by modifying corresponding parameters to match the requirements.

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

Images