Spiral micro-channel heat exchanger

Abstract

The utility model discloses a spiral microchannel heat exchanger, which comprises a shunting part, a confluence part positioned below the shunting part and a spiral heat exchange core body positioned between the shunting part and the confluence part, and hot fluid and cold fluid flow into the spiral heat exchange core body from the shunting part for heat exchange and then flow out from the confluence part. The spiral heat exchange core body is provided with a plurality of groups of spiral heat exchange tubes which are uniformly distributed along the circumferential direction; and each group of spiral heat exchange tubes comprises a hot fluid heat exchange tube and a cold fluid heat exchange tube. Each spiral heat exchange tube is provided with a plurality of heat exchange channels distributed in the radial direction, and the heat exchange channels comprise the forward rotation heat exchange channels and the reverse rotation heat exchange channels which are arranged at intervals in the radial direction. The forward rotation heat exchange channel of the hot fluid heat exchange pipe and the backward rotation heat exchange channel of the cold fluid heat exchange pipe are partially overlapped in the radial direction. The heat exchange channel adopts a mode that forward rotation and reverse rotation are matched with each other, so that the structure of the spiral heat exchange core body is more compact, and the space utilization efficiency is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to heat exchange technical field especially relates to a high -efficient energy -conserving spiral microchannel heat exchanger. BACKGROUND

[0002] In the existing heat exchange technology, microchannel heat exchanger as a kind of efficient heat exchange equipment, widely used in ship, aerospace, industrial equipment, chemical industry and other fields.The traditional microchannel heat exchanger is mainly composed of header, microchannel flat tube and fin.Microchannel flat tube is its core component, its internal passage size is very small, usually passage hydraulic diameter is between 10-1000 μm.These flat tubes are generally connected by diffusion welding process and other processes by multilayer sheet, can provide larger heat exchange area in very small space.At the same time, fin is installed between flat tube, for enhancing the heat exchange between fluid.

[0003] Compared with other types of heat exchanger, it has the advantages of high heat exchange performance, good compactness, light weight and the like.However, with the continuous development of industrial technology, the performance requirement of microchannel heat exchanger is higher and higher, needs a more compact structure, better heat exchange performance, even in manufacturing process, improved welding process can enhance the stability and sealing property of heat exchanger structure.

[0004] Therefore, it is hoped that a new spiral microchannel heat exchanger is proposed to overcome the above defects. CONTENT OF THE UTILITY MODEL

[0005] The utility model aims at providing a high -efficient energy -conserving spiral microchannel heat exchanger, achieves the purpose that structure is more compact, heat exchange performance is better and welding is convenient.

[0006] To achieve the above object, the utility model adopts the following technical scheme: a spiral microchannel heat exchanger, including the shunt portion, the header portion below the shunt portion and the spiral heat exchange core body between the shunt portion and the header portion, hot fluid and cold fluid flow into the spiral heat exchange core body from the shunt portion and flow out from the header portion after heat exchange in the spiral heat exchange core body;The spiral heat exchange core body is provided with a plurality of spiral heat exchange pipes arranged uniformly along the circumference, each group of spiral heat exchange pipes includes a hot fluid heat exchange pipe and a cold fluid heat exchange pipe, hot fluid flows through the hot fluid heat exchange pipe, and cold fluid flows through the cold fluid heat exchange pipe.Each spiral heat exchange pipe is provided with a plurality of heat exchange channels arranged along the radial direction, and a plurality of heat exchange channels include positive rotation heat exchange channels and reverse rotation heat exchange channels arranged at intervals in the radial direction, on the circumferential section of the spiral heat exchange core body, the positive rotation heat exchange channel of the hot fluid heat exchange pipe and the reverse rotation heat exchange channel of the cold fluid heat exchange pipe partially overlap in the radial direction.

[0007] In a preferred embodiment, the spiral heat exchange core is integrally manufactured by 3D printing.

[0008] In a preferred embodiment, the heat exchange channel spirally extends from the top surface of the spiral heat exchange core to the bottom surface of the spiral heat exchange core, and the number of revolutions of the heat exchange channel in the circumferential direction is an integer.

[0009] In a preferred embodiment, the hot fluid heat exchange pipe has a hot fluid inlet on the top surface of the spiral heat exchange core and a hot fluid outlet on the bottom surface of the spiral heat exchange core, and the cold fluid heat exchange pipe has a cold fluid inlet on the top surface of the spiral heat exchange core and a cold fluid outlet on the bottom surface of the spiral heat exchange core, the hot fluid inlet and the cold fluid inlet are spaced apart and uniformly arranged in the circumferential direction.

[0010] In a preferred embodiment, the hot fluid inlet and the hot fluid outlet are centrally symmetrically arranged in the radial direction, and the cold fluid inlet and the cold fluid outlet are centrally symmetrically arranged in the radial direction.

[0011] In a preferred embodiment, the flow distribution part is provided with a flow distribution chamber connected to the top surface of the spiral heat exchange core, the flow distribution chamber is provided with a first flow distribution chamber communicated with the cold fluid inlet and a second flow distribution chamber communicated with the hot fluid inlet, the first flow distribution chamber and the second flow distribution chamber are independently arranged, cold fluid is contained in the first flow distribution chamber and flows into the cold fluid heat exchange pipe from the cold fluid inlet, and hot fluid is contained in the second flow distribution chamber and flows into the hot fluid heat exchange pipe from the hot fluid inlet.

[0012] In a preferred embodiment, the flow distribution part is provided with a flow distribution sleeve connected to the upper part of the flow distribution chamber, the flow distribution sleeve is provided with a flow distribution thin tube extending in the axial direction and a flow distribution thick tube sleeved outside the flow distribution thin tube, the flow distribution thin tube is communicated with the first flow distribution chamber, and the flow distribution thick tube is communicated with the second flow distribution chamber.

[0013] In a preferred embodiment, the flow collection part is provided with a flow collection chamber connected to the bottom surface of the spiral heat exchange core, the flow collection chamber is provided with a first flow collection chamber communicated with the cold fluid outlet and a second flow collection chamber communicated with the hot fluid outlet, the first flow collection chamber and the second flow collection chamber are independently arranged, cold fluid flows into the first flow collection chamber from the cold fluid outlet of the cold fluid heat exchange pipe, and hot fluid flows into the second flow collection chamber from the hot fluid outlet of the hot fluid heat exchange pipe.

[0014] In the preferred implementation, the confluence part is provided with a confluence sleeve connected to the lower confluence chamber, the confluence sleeve is provided with a confluence thin tube extending in the axial direction and a confluence thick tube sleeved outside the confluence thin tube, the confluence thin tube is communicated with the first confluence chamber, and the confluence thick tube is communicated with the second confluence chamber.

[0015] In the preferred implementation, the spiral heat exchange core is provided with three groups of the spiral heat exchange pipes arranged uniformly in the circumferential direction.

[0016] Compared with the prior art, the helical heat exchange pipe has the following beneficial effects: each spiral heat exchange pipe is provided with a plurality of heat exchange channels arranged in the radial direction, the plurality of heat exchange channels include the right-handed heat exchange channels and the left-handed heat exchange channels arranged at intervals in the radial direction, and the right-handed heat exchange channels of the hot fluid heat exchange pipe and the left-handed heat exchange channels of the cold fluid heat exchange pipe partially overlap in the radial direction on the circumferential section of the spiral heat exchange core. The spiral heat exchange pipe adopts a spiral structure, is longer than a linear heat exchange pipe flow channel, and improves the heat exchange efficiency; and the plurality of heat exchange channels of each spiral heat exchange pipe respectively adopt the right-handed and left-handed cooperation mode, so that the structure of the spiral heat exchange core is more compact, and the space utilization efficiency is higher. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a perspective view of the spiral microchannel heat exchanger in the preferred embodiment of the utility model.

[0018] Figure 2 is Figure 1 the front view of the spiral microchannel heat exchanger.

[0019] Figure 3 is Figure 2 the sectional view of the spiral microchannel heat exchanger along the A-A direction.

[0020] Figure 4 is Figure 2 the sectional view of the spiral microchannel heat exchanger along the B-B direction.

[0021] Figure 5 is Figure 1 the perspective view of the spiral heat exchange core in the spiral microchannel heat exchanger.

[0022] Figure 6 is Figure 5 the perspective view of the spiral heat exchange core from another angle.

[0023] Figure 7 is Figure 5 the top view of the spiral heat exchange core. DETAILED DESCRIPTION

[0024] Please refer to Figures 1 to 7 The preferred embodiment of the utility model discloses a spiral microchannel heat exchanger 100 for heat exchange of hot fluid and cold fluid. The spiral microchannel heat exchanger 100 includes a distribution part 10, a confluence part 20 below the distribution part 10 and a spiral heat exchange core 30 between the distribution part 10 and the confluence part 20, and the hot fluid and the cold fluid flow into the spiral heat exchange core 30 from the distribution part 10 and flow out of the confluence part 20 after heat exchange in the spiral heat exchange core 30.

[0025] Please refer to Figures 2 to 3 The distribution part 10 is provided with an integrally-formed distribution sleeve 11 and a distribution chamber 12, and the distribution chamber 12 is connected to the top surface of the spiral heat exchange core 30. The distribution sleeve 11 is connected above the distribution chamber 12, and the distribution sleeve 11 is provided with a distribution thin tube 111 extending in the axial direction and a distribution thick tube 112 sleeved outside the distribution thin tube 111. The distribution chamber 12 is provided with a first distribution chamber 121 communicated with the distribution thin tube 111 and a second distribution chamber 122 communicated with the distribution thick tube 112, and the cold fluid flows into the first distribution chamber 121 through the distribution thin tube 111 and is contained in the first distribution chamber 121, and the hot fluid flows into the second distribution chamber 122 through the distribution thick tube 112 and is contained in the second distribution chamber 122. At the same time, the first distribution chamber 121 and the second distribution chamber 122 are independently arranged, avoiding the problem of cross flow between the cold fluid and the hot fluid.

[0026] The confluence part 20 is provided with an integrally-formed confluence sleeve 21 and a confluence chamber 22, and the confluence chamber 22 is connected to the bottom surface of the spiral heat exchange core 30. The confluence sleeve 21 is connected below the confluence chamber 22, and the confluence sleeve 21 is provided with a confluence thin tube 211 extending in the axial direction and a confluence thick tube 212 sleeved outside the confluence thin tube 211. The confluence chamber 22 is provided with a first confluence chamber 221 communicated with the confluence thin tube 211 and a second confluence chamber 222 communicated with the confluence thick tube 212, that is, the liquid in the first confluence chamber 221 flows out of the confluence thin tube 211, and the liquid in the second confluence chamber 222 flows out of the confluence thick tube 212. At the same time, the first confluence chamber 221 and the second confluence chamber 222 are independently arranged, avoiding the problem of cross flow between the cold fluid and the hot fluid.

[0027] Please refer to Figures 4 to 7 The spiral heat exchange core 30 is a cylindrical structure integrally manufactured by 3D printing, which has compact structure, thereby improving the actual production efficiency, avoiding the problem of fluid flow channel deformation caused by welding deformation in traditional welding technology, reducing the welding difficulty, and ensuring the stability and sealing performance of the microchannel heat exchanger structure to a certain extent.

[0028] The spiral heat exchange core 30 is provided with a plurality of groups of spiral heat exchange pipes 40 arranged uniformly in the circumferential direction. Each group of the spiral heat exchange pipes 40 comprises one hot fluid heat exchange pipe 41 and one cold fluid heat exchange pipe 42. Hot fluid flows through the hot fluid heat exchange pipe 41, and cold fluid flows through the cold fluid heat exchange pipe 42. In this embodiment, the spiral heat exchange core 30 is provided with three groups of spiral heat exchange pipes 40, and the three groups of spiral heat exchange pipes 40 are six spiral heat exchange pipes 40 in total. The spiral micro-channel heat exchanger 100 is designed by a multi-flow channel structure, thereby increasing the heat exchange flow rate between the cold fluid and the hot fluid.

[0029] The hot fluid heat exchange pipe 41 has a hot fluid inlet 411 located on the top surface of the spiral heat exchange core 30 and a hot fluid outlet 412 located on the bottom surface of the spiral heat exchange core 30. The second distribution chamber 122 is connected to the hot fluid inlet 411, and the second collection chamber 222 is connected to the hot fluid outlet 412. Hot fluid flows into the hot fluid heat exchange pipe 41 from the second distribution chamber 122 through the hot fluid inlet 411, and then flows into the second collection chamber 222 through the hot fluid outlet 412.

[0030] The cold fluid heat exchange pipe 42 has a cold fluid inlet 421 located on the top surface of the spiral heat exchange core 30 and a cold fluid outlet 422 located on the bottom surface of the spiral heat exchange core 30. The first distribution chamber 121 is connected to the cold fluid inlet 421, and the first collection chamber 221 is connected to the cold fluid outlet 422. Cold fluid flows into the cold fluid heat exchange pipe 42 from the first distribution chamber 121 through the cold fluid inlet 421, and then flows into the first collection chamber 221 through the cold fluid outlet 422.

[0031] In this embodiment, the hot fluid inlet 411 and the cold fluid inlet 421 are arranged uniformly and spaced apart in the circumferential direction, and the hot fluid outlet 412 and the cold fluid outlet 422 are arranged uniformly and spaced apart in the circumferential direction. At the same time, the hot fluid inlet 411 and the hot fluid outlet 412 are arranged in a central symmetry in the radial direction, and the cold fluid inlet 421 and the cold fluid outlet 422 are arranged in a central symmetry in the radial direction.

[0032] Each of the spiral heat exchange pipes 40 is provided with a plurality of heat exchange channels 31 arranged in the radial direction. The heat exchange channels 31 extend spirally from the top surface of the spiral heat exchange core 30 to the bottom surface of the spiral heat exchange core 30. Since the heat exchange channels 31 are designed in a spiral form, the effective heat exchange length of the heat exchange channels 31 is extended, thereby further improving the heat exchange efficiency of the spiral micro-channel heat exchanger 100. At the same time, the number of rotation turns of the heat exchange channels 31 in the circumferential direction is an integer, thereby realizing the central symmetry of the hot fluid inlet 411 and the hot fluid outlet 412 in the radial direction.

[0033] Several of the heat exchange channels 31 include radially spaced positive rotation heat exchange channels 32 and negative rotation heat exchange channels 33, and on the circumferential section of the spiral heat exchange core 30, the positive rotation heat exchange channels 32 of the hot fluid heat exchange pipes 41 partially overlap the negative rotation heat exchange channels 33 of the cold fluid heat exchange pipes 42 in the radial direction. The spiral heat exchange pipes 40 adopt a spiral structure, which is longer than a linear heat exchange pipe flow channel, thereby improving the heat exchange efficiency; and the several heat exchange channels 31 of each spiral heat exchange pipe 40 adopt a positive rotation and negative rotation cooperation mode, so that the structure of the spiral heat exchange core 30 is more compact, and the space utilization efficiency is higher. At the same time, the spiral micro-channel heat exchanger 100 further includes a shell (not shown) wrapped outside the spiral heat exchange core 30, which plays a protective and supporting role, so that the spiral micro-channel heat exchanger 100 forms a relatively closed space, reduces heat loss, and further improves the heat exchange efficiency.

[0034] The working principle of the spiral micro-channel heat exchanger 100 is as follows: the cold and hot fluids are respectively divided into the first and second flow dividing chambers 121 and 122 through the flow dividing fine pipes 111 and the flow dividing thick pipes 112 in the flow dividing sleeve 11 at the upper end; the cold and hot fluids enter the corresponding cold fluid heat exchange pipes 42 and hot fluid heat exchange pipes 41 under the action of pressure, the cold fluid heat exchange pipes 42 and the hot fluid heat exchange pipes 41 are spiral flow channels in reverse interlocking form, and the cold and hot fluids complete the cold and hot exchange of media in this process; then the cold and hot fluids are respectively converged to the first and second converging chambers 221 and 222 at the lower end, and finally flow out through the converging fine pipes 211 and the converging thick pipes 212 in the converging sleeve 21 at the lower end.

[0035] In this embodiment, the hot fluid and the cold fluid flow in the same direction along the axial direction; obviously, in other embodiments, the hot fluid and the cold fluid can also flow in opposite directions along the axial direction. Specifically, the hot fluid still flows in the above-mentioned flow direction, while the cold fluid flows from the converging fine pipe 211 into the first converging chamber 221, and then flows into the cold fluid heat exchange pipe 42 through the cold fluid outlet 422; after completing the heat exchange with the hot fluid heat exchange pipe 41 in the cold fluid heat exchange pipe 42, the cold fluid flows from the cold fluid inlet 421 into the first flow dividing chamber 121, and finally flows out from the flow dividing fine pipe 111.

[0036] The utility model discloses a plurality of heat exchange channels 31 are arranged along the radial direction to each spiral heat exchange pipe 40, and the plurality of heat exchange channels 31 include the positive rotation heat exchange channel 32 and the reverse rotation heat exchange channel 33 that are arranged at intervals in the radial direction, on the circumferential section of spiral heat exchange core body 30, the positive rotation heat exchange channel 32 of hot fluid heat exchange pipe 41 and the reverse rotation heat exchange channel 33 of cold fluid heat exchange pipe 42 partially overlap in the radial direction. The spiral heat exchange pipe 40 adopts the spiral structure, compared with the longer heat exchange pipe flow channel of linear type, improves the heat exchange efficiency, and the plurality of heat exchange channels 31 of each spiral heat exchange pipe 40 adopt the positive rotation, reverse rotation mutually matched mode respectively, make the structure of spiral heat exchange core body 30 more compact, and the space utilization efficiency is higher.

[0037] In summary, the above is only the preferred embodiment of the utility model, and should not limit the scope of the utility model, that is, all simple equivalent changes and modifications made according to the utility model claims and the content of the specification should still belong to the scope of the utility model patent.

Claims

1. A spiral microchannel heat exchanger, comprising a diverter, a confluence below the diverter, and a spiral heat exchange core between the diverter and the confluence, wherein hot and cold fluids flow from the diverter into the spiral heat exchange core and, after heat exchange within the spiral heat exchange core, flow out of the confluence; the spiral heat exchange core is provided with a plurality of spiral heat exchange tubes uniformly arranged along the circumference, each group of spiral heat exchange tubes comprising a hot fluid heat exchange tube and a cold fluid heat exchange tube, wherein the hot fluid flows through the hot fluid heat exchange tube and the cold fluid flows through the cold fluid heat exchange tube; and characterized in that: Each of the spiral heat exchange tubes is provided with a plurality of heat exchange channels arranged radially, and the plurality of heat exchange channels include forward-rotating heat exchange channels and reverse-rotating heat exchange channels spaced apart in the radial direction. On the circumferential cross-section of the spiral heat exchange core, the forward-rotating heat exchange channels of the hot fluid heat exchange tube and the reverse-rotating heat exchange channels of the cold fluid heat exchange tube partially overlap in the radial direction.

2. The spiral microchannel heat exchanger according to claim 1, characterized in that: The spiral heat exchange core is manufactured in an integrated manner by 3D printing.

3. The spiral microchannel heat exchanger according to claim 1, wherein: The heat exchange channel spirally extends from the top surface of the spiral heat exchange core to the bottom surface of the spiral heat exchange core, and the number of rotations of the heat exchange channel in the circumferential direction is an integer.

4. The spiral microchannel heat exchanger according to claim 3, characterized in that: The hot fluid heat exchange tube has a hot fluid inlet located on the top surface of the spiral heat exchange core and a hot fluid outlet located on the bottom surface of the spiral heat exchange core. The cold fluid heat exchange tube has a cold fluid inlet located on the top surface of the spiral heat exchange core and a cold fluid outlet located on the bottom surface of the spiral heat exchange core. The hot fluid inlet and the cold fluid inlet are spaced apart in the circumferential direction and are evenly arranged.

5. The spiral microchannel heat exchanger according to claim 4, characterized in that: The hot fluid inlet and the hot fluid outlet are arranged symmetrically in the radial direction, and the cold fluid inlet and the cold fluid outlet are arranged symmetrically in the radial direction.

6. The spiral microchannel heat exchanger according to claim 4, characterized in that: The diversion part is provided with a diversion chamber connected to the top surface of the spiral heat exchange core, and the diversion chamber is provided with a first diversion chamber connected to the cold fluid inlet and a second diversion chamber connected to the hot fluid inlet. The first diversion chamber and the second diversion chamber are independently arranged with each other. The cold fluid is contained in the first diversion chamber and flows from the cold fluid inlet into the cold fluid heat exchange tube. The hot fluid is contained in the second diversion chamber and flows from the hot fluid inlet into the hot fluid heat exchange tube.

7. The spiral microchannel heat exchanger according to claim 6, characterized in that: The diversion part is provided with a diversion sleeve connected to the top of the diversion chamber, and the diversion sleeve is provided with a diversion thin tube extending axially and a diversion thick tube sleeved on the outside of the diversion thin tube. The diversion thin tube is connected to the first diversion chamber, and the diversion thick tube is connected to the second diversion chamber.

8. The spiral microchannel heat exchanger according to claim 6, characterized in that: The confluence portion is provided with a confluence chamber connected to the bottom surface of the spiral heat exchange core, and the confluence chamber is provided with a first confluence chamber connected to the cold fluid outlet and a second confluence chamber connected to the hot fluid outlet. The first confluence chamber and the second confluence chamber are independently arranged with each other, and the cold fluid flows into the first confluence chamber from the cold fluid outlet of the cold fluid heat exchange tube, and the hot fluid flows into the second confluence chamber from the hot fluid outlet of the hot fluid heat exchange tube.

9. The spiral microchannel heat exchanger according to claim 8, characterized in that: The confluence portion is provided with a confluence sleeve connected to the bottom of the confluence chamber, and the confluence sleeve is provided with a confluence capillary tube extending axially and a confluence thick tube sleeved on the outside of the confluence capillary tube. The confluence capillary tube is connected to the first confluence chamber, and the confluence thick tube is connected to the second confluence chamber.

10. The spiral microchannel heat exchanger according to claim 1, wherein: The spiral heat exchange core is provided with three groups of spiral heat exchange tubes evenly arranged along the circumferential direction.

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