CN113028867A - Microchannel heat exchanger for multi-fluid heat exchange - Google Patents
Microchannel heat exchanger for multi-fluid heat exchange Download PDFInfo
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- CN113028867A CN113028867A CN202110313646.5A CN202110313646A CN113028867A CN 113028867 A CN113028867 A CN 113028867A CN 202110313646 A CN202110313646 A CN 202110313646A CN 113028867 A CN113028867 A CN 113028867A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D9/00—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall
- F28D9/0031—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other
- F28D9/0037—Heat-exchange apparatus having stationary plate-like or laminated conduit assemblies for both heat-exchange media, the media being in contact with different sides of a conduit wall the conduits for one heat-exchange medium being formed by paired plates touching each other the conduits for the other heat-exchange medium also being formed by paired plates touching each other
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/02—Header boxes; End plates
- F28F9/04—Arrangements for sealing elements into header boxes or end plates
- F28F9/16—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling
- F28F9/18—Arrangements for sealing elements into header boxes or end plates by permanent joints, e.g. by rolling by welding
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to a microchannel heat exchanger for heat exchange of multiple streams of fluids, belonging to the field of heat exchangers, and aiming at overcoming the defect that the prior heat exchanger can not realize heat exchange of multiple streams of different fluids and one stream of fluid at the same time, the microchannel heat exchanger comprises: establish the heat transfer casing of heat transfer core in, the heat transfer casing respectively with the lower part medium entry collection case of heat transfer core intercommunication, upper portion medium export collection case, left side medium entry collection case and right side medium export collection case, the heat transfer core is at least two sets of independent modules that set up side by side, straight line medium passageway and the ladder medium passageway that link up about every group heat transfer core establishes, the flow direction of medium is opposite with the flow direction of medium in the ladder medium passageway in the straight line medium passageway, lower part medium entry collection case and upper portion medium export collection case communicate with the straight line medium passageway of all heat transfer cores respectively, left side medium entry collection case and right side medium export collection case communicate with the ladder medium passageway of at least a set of heat transfer core respectively. The invention can realize the simultaneous high-efficiency heat exchange of one strand of fluid and a plurality of strands of fluid.
Description
The technical field is as follows:
the invention belongs to the technical field of heat exchangers, and particularly relates to a microchannel heat exchanger for multi-fluid heat exchange.
Background art:
the heat exchanger is an energy-saving device for realizing heat transfer between materials among fluids with different temperatures, and is used for transferring heat from the fluid with higher temperature to the fluid with lower temperature so that the temperature of the fluid reaches the index specified by the process to meet the requirements of process conditions, and is also one of main devices for improving the energy utilization rate. Two fluids are usually adopted in the heat exchanger for heat exchange, and when a plurality of streams of fluids need to be subjected to heat exchange at the same time, a plate-fin heat exchanger is usually adopted, but the plate-fin heat exchanger is limited by the structural form and the connection mode, the maximum applicable parameter is less than 8.0MPa, and the requirements of the industries such as the electronic technology, aviation industry and aerospace industry on higher heat exchange parameters cannot be met.
The invention content is as follows:
the invention provides a microchannel heat exchanger for exchanging heat of multiple streams of fluid, aiming at overcoming the defect that the traditional heat exchanger can not realize heat exchange of multiple streams of fluid and one stream of fluid at the same time.
The technical scheme adopted by the invention is as follows: a microchannel heat exchanger for multiple fluid heat exchange, comprising: the heat exchange device comprises a heat exchange shell, wherein a heat exchange core is arranged in the heat exchange shell, a lower medium inlet header, an upper medium outlet header, a left medium inlet header and a right medium outlet header which are communicated with the heat exchange core are respectively arranged on the heat exchange shell, the lower medium inlet header, the upper medium outlet header, the left medium inlet header and the right medium outlet header are respectively and oppositely arranged on different end surfaces of the heat exchange shell, the heat exchange core is at least two groups of independent modules which are arranged in parallel and used for simultaneously exchanging heat between a strand of fluid and a strand of different fluids, a straight medium channel which is communicated up and down and a stepped medium channel which is communicated left and right are arranged in each group of heat exchange core, the flow direction of the medium in the straight medium channel is opposite to the flow direction of the medium in the stepped medium channel, and the lower medium inlet header and the upper medium outlet header are respectively communicated with the straight medium channels in all the heat exchange, the left medium inlet header and the right medium outlet header are respectively communicated with the stepped medium channels in at least one group of heat exchange cores, and the number of the left medium inlet header and the right medium outlet header corresponds to the type of the fluid flowing transversely left and right.
Preferably, the heat exchange core comprises two side end plates and at least one group of heat exchange plates clamped in the two side end plates, wherein each group of heat exchange plates comprises; the cold plate and the hot plate are alternately arranged, a plurality of Z-shaped grooves which are arranged in parallel are etched on one side of the cold plate, and the other side of the cold plate is a straight surface; the etching has many mutual parallel arrangement's straight line recess in one side of hot plate, is straight face at the opposite side of hot plate, and the Z font recess of cold plate encloses jointly with the straight face of hot plate and forms ladder medium passageway, and the straight line recess of hot plate encloses jointly with the straight face of cold plate and forms straight line medium passageway, and the middle part of every straight line medium passageway is parallel or crisscross setting with the middle part of a ladder medium passageway.
Preferably, the longitudinal sections of the zigzag grooves and the linear grooves are semicircular, and the radius sizes of the linear medium channels in each heat exchange core are the same, partially the same or different.
Preferably, the longitudinal sections of the zigzag grooves and the linear grooves are semicircular, and the radius sizes of the stepped medium channels in each heat exchange core are the same, partially the same or different.
Preferably, the side end plate, the cold plate and the hot plate are fixed by diffusion welding.
Preferably, the thickness of the side end plate is greater than the thickness of the heat exchange plate.
Preferably, the lower medium inlet header, the upper medium outlet header, the left medium inlet header and the right medium outlet header have the same structure and adopt semicircular header head structures.
The invention has the beneficial effects that:
1. the heat exchanger has the advantages that at least two independently arranged heat exchange cores can realize heat exchange between one fluid and at least two different fluids simultaneously, so that the heat exchanger is suitable for different heat exchange requirements, and the heat exchanger has the characteristics of compact structure, space saving, excellent heat transfer performance and high heat exchange efficiency.
2. Compared with the traditional connection mode, the connection mode of diffusion welding is adopted between the side end plate and the heat exchange plate, the working pressure of equipment can be increased to 35Mpa, so that the requirements of high temperature, high pressure, less leakage and the like can be met in the heat exchange process, and the connection mode is suitable for the working condition with higher parameters which cannot be applied to a plate-fin heat exchanger, and has wider application range.
3. The invention realizes heat exchange by one fluid and a plurality of fluids simultaneously, and the number of the channels on the heat exchange plate can be selected to be the same or different according to the design requirement, and the specifications of the heat exchange plate such as length, width, thickness and the like can also be adjusted according to the design requirement, thereby ensuring the realization of the maximum heat exchange efficiency and the minimum flow resistance.
4. The linear medium channel adopts a vertically through linear structure, has small resistance and good heat transfer effect, is convenient to process and manufacture, and saves the production cost.
Description of the drawings:
FIG. 1 is a schematic structural view of example 1 of the present invention;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a schematic view of a single bank of heat exchanger cores;
FIG. 4 is a schematic view of a heat exchange plate;
FIG. 5 is a side view of FIG. 4;
FIG. 6 is a schematic view of a cold plate;
FIG. 7 is a schematic structural view of a hot plate;
FIG. 8 is a schematic view of the upper media outlet header;
FIG. 9 is a schematic structural view of example 2;
wherein: 1 lower media inlet header, 2 upper media outlet header, 3 left media inlet header, 4 right media outlet header, 5 heat exchange core, 51 side end plate, 52 heat exchange plate, 521 cold plate, 5211 zigzag groove, 5212 stepped media channel, 522 hot plate, 5221 straight groove, 5222 straight media channel.
The specific implementation mode is as follows:
example 1
As shown in fig. 1 and 2, the present invention is a microchannel heat exchanger for multi-fluid heat exchange, comprising: the heat exchange shell is internally provided with a heat exchange core 5, the heat exchange shell is respectively provided with a lower medium inlet header 1, an upper medium outlet header 2, a left medium inlet header 3 and a right medium outlet header 4 which are communicated with the heat exchange core 5, the lower medium inlet header 1 and the upper medium outlet header 2 are oppositely arranged on the upper end surface and the lower end surface of the heat exchange shell, the left medium inlet header 3 and the right medium outlet header 4 are used in pairs and are respectively and oppositely arranged on the left end surface and the right end surface of the heat exchange shell, the left medium inlet headers 3 are a plurality of groups which are arranged in parallel according to design requirements, and the right medium outlet headers 4 correspond to the left medium inlet headers 3. The heat medium can flow into the lower medium inlet header 1, and the cold medium can flow into the lower medium inlet header according to actual conditions, the temperature of the medium flowing into the left medium inlet header 3 is always opposite to the temperature of the medium flowing into the lower medium inlet header 1, and the number of the left medium inlet headers 3 corresponds to the number of different fluids flowing left and right. The heat exchange cores 5 are arranged in the heat exchange shell in parallel and are composed of at least two groups of independent modules, the heat exchange cores 5 are used for simultaneously exchanging heat for one fluid and a plurality of different fluids, the upper ends and the lower ends of all the heat exchange cores 5 are respectively communicated with the lower medium inlet header 1 and the upper medium outlet header 2, and the left ends and the right ends of each group of heat exchange cores 5 are respectively communicated with the left medium inlet header 3 and the right medium outlet header 4. In this embodiment, a hot medium fluid a flows into the lower medium inlet header 1, the left medium inlet headers 3 are divided into two groups, each group of left medium inlet headers 3 corresponds to one group of heat exchange cores 5, each group of heat exchange cores 5 is communicated with one group of right medium outlet headers 4, and two different cold medium fluids B and C flow into the two groups of heat exchange cores 5.
As shown in fig. 4 to 7, each group of heat exchange plates 52 includes cold plates 521 and hot plates 522 which are alternately arranged, a plurality of rows of zigzag grooves 5211 which are arranged in parallel are etched on one side of the cold plates 521, the zigzag grooves 5211 penetrate through the left and right ends of the cold plates 521, the middle parts of the zigzag grooves 5211 are straight lines arranged along the length direction of the cold plates 521, and the other sides of the cold plates 521 are straight surfaces; a plurality of rows of linear grooves 5221 are etched in parallel on one side of the heat plate 522, the linear grooves 5221 penetrate the upper and lower ends of the heat plate 522, and the other side of the heat plate 522 is a flat surface. The longitudinal sections of the zigzag groove 5211 and the linear groove 5221 are semicircular, the radius of the semicircular shape is determined according to the flow rate and parameters of the medium, the zigzag groove 5211 of the cold plate 521 and the flat surface of the hot plate 522 together enclose a stepped medium channel 5212, and the linear groove 5221 of the hot plate 522 and the flat surface of the cold plate 521 together enclose a linear medium channel 5222. The lower medium inlet header 1 and the upper medium outlet header 2 are respectively communicated with the linear medium channels 5222 of all the heat exchange cores 5, and the left medium inlet header 3 and the right medium outlet header 4 are respectively communicated with the stepped medium channels 5212 in the corresponding group of heat exchange cores 5. Because the cold media flowing into different heat exchange cores 5 are different, the stepped media passages 5212 and the linear media passages 5222 in different heat exchange cores 5 may have the same, partially the same or different passage cross-sectional sizes, so as to reduce the flow resistance as much as possible. In order to improve the heat exchange efficiency, the middle part of each linear medium channel 5222 and the middle part of one stepped medium channel 5212 in each group of heat exchange cores 5 are arranged in parallel or staggered with each other along the length direction, and the flow direction of the medium in the middle part of the linear medium channel 5222 is opposite to the flow direction of the medium in the middle part of the stepped medium channel 5212.
As shown in fig. 8, the lower medium inlet header 1, the upper medium outlet header 2, and the right medium outlet header 4 have the same structure, and all adopt a semicircular header head structure. The inlet of the lower medium inlet header 1 is communicated with a heat source of a strand of heat medium fluid A, and the heat source flows into each heat exchange core 5; the upper medium outlet header 2 collects the heat medium fluid a flowing out of each heat exchange core 5 and then flows out. Inlets of the two left medium inlet header tanks 3 are respectively communicated with cold sources of the cold medium fluid B and the cold medium fluid C, and the corresponding cold media flow into the corresponding heat exchange cores 5; the two right medium outlet header tanks 4 respectively discharge the cold medium in the corresponding heat exchange core 5.
When the heat exchange device is used, a strand of heat medium fluid A enters the two heat exchange cores 5 from the lower medium inlet header 1 and flows out of the upper medium outlet header 2 after heat exchange, meanwhile, a cold medium fluid B and a cold medium fluid C respectively enter the corresponding heat exchange cores 5 from the corresponding left medium inlet header 3, the cold medium fluid B and the heat medium fluid A flow out of the corresponding right medium outlet header 4 after heat exchange, and the cold medium fluid C and the heat medium fluid A flow out of the corresponding right medium outlet header 4 after heat exchange.
Example 2
Example 2 differs from example 1 only in the amount of fluid that is simultaneously involved in the heat exchange.
This embodiment achieves heat exchange between one stream of hot medium fluid a and three different streams of cold medium fluid B, C and D simultaneously, as desired. Three independent heat exchange cores 5 are arranged in the heat exchange shell, and three left medium inlet header 3 and three right medium outlet header 4 respectively correspond to one group of heat exchange cores 5. Since the flow of the cooling medium flowing into each heat exchange core 5 is different, the stepped media passages 5212 and the straight media passages 5222 in different heat exchange cores 5 may have the same, partially the same, or different passage cross-sectional sizes, in order to reduce the flow resistance as much as possible.
When the heat exchange device is used, a strand of heat medium fluid A enters the three heat exchange cores 5 from the lower medium inlet header 1 and flows out of the upper medium outlet header 2 after heat exchange, meanwhile, three strands of cold medium fluid B, cold medium fluid C and cold medium fluid D respectively enter the corresponding heat exchange cores 5 from the corresponding left medium inlet header 3, the cold medium fluid B flows out of the corresponding right medium outlet header 4 after heat exchange with the heat medium fluid A, the cold medium fluid C flows out of the corresponding right medium outlet header 4 after heat exchange with the heat medium fluid A, and the cold medium fluid D flows out of the corresponding right medium outlet header 4 after heat exchange with the heat medium fluid A.
Example 3
According to the different heat exchange requirements and heat exchange medium characteristics, the thickness of the heat exchanger is designed, the number of heat exchange cores 5 participating in heat exchange of each strand of medium fluid flowing transversely left and right can be different, for example, two strands of cold media are cold medium fluid B and cold medium fluid C, the left medium inlet header 3 and the right medium outlet header 4 of the cold medium fluid B correspond to two heat exchange cores 5, the left medium inlet header 3 and the right medium outlet header 4 of the cold medium fluid C correspond to one heat exchange core 5, or the left medium inlet header 3 and the right medium outlet header 4 of the cold medium fluid B correspond to three heat exchange cores 5, the left medium inlet header 3 and the right medium outlet header 4 of the cold medium fluid C correspond to two heat exchange cores 5, and the like, and the combination forms are not illustrated in a row.
The above description is only a preferred embodiment of the present invention, and these embodiments are based on different implementations of the present invention, and the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. A microchannel heat exchanger for multiple fluid heat exchange, comprising: the heat exchange shell is internally provided with a heat exchange core (5), the heat exchange shell is respectively provided with a lower medium inlet header (1), an upper medium outlet header (2), a left medium inlet header (3) and a right medium outlet header (4) which are communicated with the heat exchange core (5), and the lower medium inlet header (1), the upper medium outlet header (2), the left medium inlet header (3) and the right medium outlet header (4) are respectively and oppositely arranged on different end surfaces of the heat exchange shell, the heat exchange shell is characterized in that the heat exchange core (5) is at least two groups of independent modules which are arranged in parallel and used for simultaneously realizing heat exchange between a strand of fluid and a plurality of strands of different fluids, each group of heat exchange core (5) is internally provided with a straight line medium channel (5222) which is communicated up and down and a step medium channel (5212) which is communicated left and right, and the flow direction of media in the middle part of the straight line medium channel (5222) is opposite to that of the step medium channel (5212) in the middle part, the lower medium inlet header (1) and the upper medium outlet header (2) are respectively communicated with linear medium channels (5222) in all the heat exchange cores (5), the left medium inlet header (3) and the right medium outlet header (4) are respectively communicated with stepped medium channels (5212) in at least one group of heat exchange cores (5), and the number of the left medium inlet header (3) and the right medium outlet header (4) corresponds to the type of fluid which transversely flows left and right.
2. A microchannel heat exchanger for multiple fluid heat exchange according to claim 1, wherein: the heat exchange core (5) comprises two side end plates (51) and at least one group of heat exchange plates (52) clamped in the two side end plates (51), and each group of heat exchange plates (52) comprises; cold plates (521) and hot plates (522) which are alternately arranged, wherein a plurality of Z-shaped grooves (5211) which are arranged in parallel are etched on one side of each cold plate (521), and the other side of each cold plate (521) is a straight surface; a plurality of linear grooves (5221) which are arranged in parallel are etched on one side of the hot plate (522), the other side of the hot plate (522) is a flat surface, the Z-shaped groove (5211) of the cold plate (521) and the flat surface of the hot plate (522) jointly enclose to form a stepped medium channel (5212), the linear groove (5221) of the hot plate (522) and the flat surface of the cold plate (521) jointly enclose to form a linear medium channel (5222), and the middle part of each linear medium channel (5222) and the middle part of one stepped medium channel (5212) are arranged in parallel or in a staggered mode.
3. A microchannel heat exchanger for multiple fluid heat exchange according to claim 2, wherein: the longitudinal sections of the Z-shaped groove (5211) and the linear groove (5221) are semicircular, and the radius sizes of the linear medium channels (5222) in each heat exchange core (5) are the same, and are partially the same or different.
4. A microchannel heat exchanger for multiple fluid heat exchange according to claim 3, wherein: the longitudinal sections of the Z-shaped groove (5211) and the linear groove (5221) are semicircular, and the radius sizes of the stepped medium channels (5212) in each heat exchange core (5) are the same, and are partially the same or different.
5. A microchannel heat exchanger for multiple fluid heat exchange according to any one of claims 2 to 4, wherein: the side end plate (51), the cold plate (521) and the hot plate (522) are fixed by diffusion welding.
6. A microchannel heat exchanger for multiple fluid heat exchange according to any one of claims 2 to 4, wherein: the thickness of the side end plate (51) is larger than that of the heat exchange plate (52).
7. A microchannel heat exchanger for multiple fluid heat exchange according to claim 1, wherein: the structure of the lower medium inlet header (1), the upper medium outlet header (2), the left medium inlet header (3) and the right medium outlet header (4) is the same, and a semicircular header seal head structure is adopted.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110313646.5A CN113028867A (en) | 2021-03-24 | 2021-03-24 | Microchannel heat exchanger for multi-fluid heat exchange |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110313646.5A CN113028867A (en) | 2021-03-24 | 2021-03-24 | Microchannel heat exchanger for multi-fluid heat exchange |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115183606A (en) * | 2022-06-20 | 2022-10-14 | 核动力运行研究所 | Double-layer uniform heat exchange plate |
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Application publication date: 20210625 |