CN211012620U - Multi-stage crotch type fin and heat exchanger - Google Patents
Multi-stage crotch type fin and heat exchanger Download PDFInfo
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- CN211012620U CN211012620U CN201921664146.0U CN201921664146U CN211012620U CN 211012620 U CN211012620 U CN 211012620U CN 201921664146 U CN201921664146 U CN 201921664146U CN 211012620 U CN211012620 U CN 211012620U
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Abstract
The utility model discloses a multistage crotch type fin to disclose the heat exchanger that has multistage crotch type fin, one of them multistage crotch type fin includes the fin body, be provided with on the fin body: more than two openings are linearly arranged along the left and right direction; the heat exchange flow channel is arranged between any two adjacent openings and comprises a plurality of gas channels which are sequentially communicated from back to front, each gas channel comprises a primary groove arranged on the fin body, and at least one primary groove in each gas channel is arranged; wherein, adjacent around arbitrary two in the gas passage, be located the front side gas passage's one-level recess with be located the rear side gas passage's one-level recess communicates each other, the utility model discloses the heat transfer runner of crotch column structure that forms can improve the heat transfer effect that the flue gas flowed through the fin body effectively.
Description
Technical Field
The utility model relates to a heat exchange equipment, in particular to multistage crotch type fin and heat exchanger.
Background
Fin gas heater utilizes external high temperature flue gas and low temperature water to carry out heat exchange's device, the fin is important component part, play important influence to holistic heat transfer effect, in the heat exchanger, cold medium matter is circulating flow in the heat exchange tube, carry out the heat exchange with the heat exchange tube wall, the fin then exchanges heat with high temperature flue gas, the very big heat transfer that hinders flue gas and fin in laminar flow boundary, current fin is flat structure, heat transfer coefficient is lower, for reinforcing heat transfer effect, some wave types appear on the market, the fin of structures such as turbulent flow post, but the flow resistance of this type of fin is great, there is obvious detention district.
SUMMERY OF THE UTILITY MODEL
The utility model discloses aim at solving one of the technical problem that exists among the prior art at least. Therefore, the utility model provides a multistage crotch type fin can improve the heat exchange efficiency of fin.
The utility model also provides a heat exchanger of having above-mentioned multistage crotch type fin.
According to the utility model discloses a multistage crotch type fin of first aspect embodiment, including the fin body, be provided with on the fin body: more than two openings are linearly arranged along the left and right direction; the heat exchange flow channel is arranged between any two adjacent openings and comprises a plurality of gas channels which are sequentially communicated from back to front, each gas channel comprises a primary groove arranged on the fin body, and at least one primary groove in each gas channel is arranged; in any two adjacent gas channels, the primary groove of the gas channel positioned on the front side is communicated with the primary groove of the gas channel positioned on the rear side.
According to the utility model discloses multistage crotch type fin has following beneficial effect at least: the fin body is provided with openings for inserting the external heat exchange tubes, and a heat exchange flow channel for improving the heat exchange effect is arranged between any two adjacent openings, particularly, when the flue gas passes through the surface of the fin body, part of the flue gas enters the heat exchange flow channel and flows through the primary grooves on each gas channel, so that the mutual mixing between the high-temperature fluid and the low-temperature fluid is improved, the heat exchange effect is improved, the number of the primary grooves in each gas channel is more than one, the primary grooves on the front side are connected with the primary grooves on the rear side in the front and rear adjacent gas channels, so that a tree-fork-shaped structure can be formed, a branch point is formed when the fluid flows from one primary groove to a plurality of grooves, and each time the fluid flows through one branch point, secondary flow is formed near the branch point, so that the backflow and separation phenomena are generated, and the mutual mixing of the high-temperature fluid and the low-temperature fluid is further improved, the secondary flow has higher strength even under low Reynolds number, and can effectively improve the heat exchange effect of the flue gas flowing through the fin body.
According to the utility model discloses a some embodiments, adjacent around arbitrary two among the gas passage, be located the rear side gas passage's one-level groove connection has at least two to be located the front side gas passage's one-level recess. That is, when the flue gas flows into the first-stage groove of the next gas channel from the first-stage groove of one gas channel, the flue gas is necessarily divided by a branch point.
According to some embodiments of the present invention, three gas channels are sequentially disposed from back to front in any one of the heat exchange flow channels, the gas channel located at the rearmost side is a first-stage flow channel, the gas channel located at the middle part is a second-stage flow channel, the gas channel located at the rearmost side is a third-stage flow channel, the first-stage flow channel includes one first-stage groove, the second-stage flow channel includes two first-stage grooves, the third-stage flow channel includes four first-stage grooves, the rear ends of the two first-stage grooves of the second-stage flow channel are connected to the front end of the first-stage groove of the first-stage flow channel, the rear ends of any two first-stage grooves of the third-stage flow channel are connected to the front end of one first-stage groove of the second-stage flow channel, the rear ends of the other two first-stage grooves of, two of the three-stage flow channels positioned in the middle are respectively connected with two second-stage grooves at the front ends of the first-stage grooves. The heat transfer runner is the structure of level four branch, the flue gas flows into behind the one-level recess of one-level runner, in two one-level recesses that enter into the second grade runner through the reposition of redundant personnel, the flue gas that flows from every one-level recess of second grade runner is through the reposition of redundant personnel reentrant two one-level recesses of tertiary runner, in four one-level recesses of tertiary runner, two one-level recesses that are located the middle part still are connected with two second grade recesses respectively, make the flue gas that flows from the tertiary runner reentrant second grade recess, the heat transfer effect has greatly been improved.
According to some embodiments of the utility model, the one-level recess of one-level runner extends to the back side of fin body, the second grade recess extends to the front side of fin body. When the flue gas flows through the fin body, part of the flue gas directly enters the first-stage groove of the first-stage flow channel and then directly flows out of the fin body from the second-stage groove.
According to some embodiments of the utility model, the heat transfer runner still including set up in through-hole on the fin body, the center of through-hole is in on the central line of the one-level recess of one-level runner, the through-hole is located one-level recess the place ahead of one-level runner. The heat exchange weak area is arranged in front of the primary groove on the fin body, smoke flows on the fin body and belongs to low Reynolds number flow, the viscous bottom layer and the main stream fluid have no obvious limit, and the through hole is formed in the heat exchange weak area of the fin body, so that the viscous bottom layer can be damaged, the mixing of the low-temperature fluid on the near wall surface and the main stream high-temperature fluid can be enhanced, and the heat exchange is enhanced; in addition, the material consumption can be reduced, and the manufacturing cost can be saved.
According to some embodiments of the invention, the through-hole is oval. The oval through holes can further improve the mixing effect of the low-temperature fluid and the high-temperature fluid and strengthen heat exchange.
According to some embodiments of the utility model, two arbitrary front and back are adjacent among the gas passage, be located the front side gas passage's one-level groove diameter is D1, is located the rear side gas passage's one-level groove diameter is D2, D1 is 0.6 to 0.9 with the ratio of D2. The diameter of the first-level groove positioned on the front side is gradually reduced in the proportion range compared with the diameter of the first-level groove positioned on the rear side, so that a good heat exchange effect is ensured.
According to some embodiments of the utility model, adjacent around two arbitrary gas passage, be located the front side among the gas passage the length of gas passage's one-level recess is H1, is located the rear side the length of gas passage's one-level recess is H2, and the ratio of H1 and H2 is 0.8 to 1. The length of the primary groove on the front side is gradually decreased in the proportional range compared with the length of the primary groove on the rear side.
According to some embodiments of the invention, the side of the opening has a flange. The external heat exchange tube inserted into the opening can be abutted against the turned edge, so that the structural stability of the fin body and the heat exchange tube is improved.
According to the utility model discloses a heat exchanger of second aspect embodiment, including the heat exchange tube, still include the above-mentioned that a plurality of block align to grid set up multistage crotch type fin, on the multistage crotch type fin the trompil is used for supplying the heat exchange tube passes, arbitrary piece multistage crotch type fin the degree of depth of one-level recess is h, and arbitrary two are adjacent distance between the multistage crotch type fin is d, and wherein, the ratio of h and d is 0.35 to 0.5.
According to the utility model discloses a heat exchanger has following beneficial effect at least: utilize above-mentioned multistage crotch type fin to arrange the setting, form a flue gas passageway between two multistage crotch type fins, when the flue gas passes through flue gas passageway, partial flue gas can flow into to the heat transfer runner in, alternate the heat exchange tube in the trompil internal fixation of every piece, the one-level recess degree homogeneous phase of every multistage crotch type fin is the same, and the processing of being convenient for, and the one-level recess degree has certain proportional relation with the distance between arbitrary two adjacent multistage crotch type fins, can obtain better heat transfer effect in this proportional design.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
fig. 1 is a schematic structural diagram of a multi-stage crotch-type fin according to an embodiment of the present invention.
A fin body 100,
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1, in the heat exchanger, including a plurality of multi-level crotch type fins arranged uniformly, the heat exchange tube is inserted into the opening 200 of each fin to connect and fix the fins, the fins can be connected with the heat exchange tube by welding, heat exchange flow channels are punched on the fins, when the flue gas enters the flue gas channel, the high temperature flue gas and the surfaces of the fins and the heat exchange tube generate heat convection, the heat is transferred to the low temperature water in the heat exchange tube by heat conduction and heat convection, the heat exchange flow channels include a plurality of gas channels arranged on the fin body 100, each gas channel is provided with a plurality of first-level grooves 210, the joints of the first-level grooves 210 and the fin body 100 are in a fillet structure, the flue gas can be mixed at the joints, the coordination degree of the local area velocity field and the temperature field is enhanced, thereby low resistance heat exchange is realized, the depth of the first-level grooves 210 is set according to the distance between the, specifically, the depth of the first-stage groove 210 of any one multi-level crotch-type fin is h, the distance between any two adjacent multi-level crotch-type fins is d, and the ratio of h to d is 0.35 to 0.5, so that a good heat exchange effect can be achieved under the ratio, in some embodiments, the ratio is 0.4, and the best heat exchange effect can be achieved under the ratio.
The multi-level crotch type fin includes fin body 100, is provided with on the fin body 100: more than two openings 200 arranged linearly in the left-right direction; the heat exchange flow channel is arranged between any two adjacent openings 200, the heat exchange flow channel comprises a plurality of gas channels which are sequentially communicated from back to front, each gas channel comprises a primary groove 210 arranged on the fin body 100, and at least one primary groove 210 in each gas channel is arranged; among any two adjacent gas passages, the primary groove 210 of the gas passage on the front side and the primary groove 210 of the gas passage on the rear side are communicated with each other.
The fin body 100 is provided with openings 200 for inserting external heat exchange tubes, and a heat exchange flow channel for improving heat exchange effect is arranged between any two adjacent openings 200, specifically, when the flue gas passes through the surface of the fin body 100, part of the flue gas enters the heat exchange flow channel and flows through the primary grooves 210 on each gas channel, so that the mutual mixing between high-temperature fluid and low-temperature fluid is improved, thereby improving the heat exchange effect, the number of the primary grooves 210 in each gas channel is more than one, and the primary grooves 210 on the front side are connected with the primary grooves 210 on the rear side in the front and rear adjacent gas channels, so that a fork-shaped structure can be formed, a branch point is formed when the fluid flows from one primary groove 210 to a plurality of grooves, and secondary flow is formed near the branch point when the fluid flows through one branch point, namely, backflow and separation phenomena are generated, the mutual mixing of the high-temperature fluid and the low-temperature fluid is further improved, the secondary flow has higher strength even under the condition of low Reynolds number, and the heat exchange effect of the flue gas flowing through the fin body 100 can be effectively improved.
In this embodiment, among any two adjacent gas passages, the primary groove 210 of the gas passage located on the rear side is connected to the primary grooves 210 of at least two gas passages located on the front side. That is, when the flue gas flows from the first-stage groove 210 of one gas channel to the first-stage groove 210 of the next gas channel, the flue gas is necessarily branched through a branch point.
In this embodiment, three gas channel has set gradually by back to front in any heat transfer runner, the gas channel who is located the rearmost side is the one-level runner, the gas channel who is located the middle part is the second grade runner, the gas channel who is located the rearmost side is tertiary runner, the one-level runner includes one-level recess 210, the second grade runner includes two one-level recesses 210, tertiary runner includes four one-level recesses 210, two one-level recess 210 rear ends of second grade runner all connect in the front end of one-level recess 210 of one-level runner, two arbitrary one-level recess 210 rear ends of tertiary runner all connect in one-level recess 210 front end of second grade runner, two one-level recess 210 front ends that lie in the middle part in the tertiary runner all are connected with two second grade recesses 230. The heat transfer runner is the structure of level four bifurcation, the flue gas flows into behind the one-level recess 210 of one-level runner, in two one-level recesses 210 of second grade runner are entered into through the reposition of redundant personnel, the flue gas that flows out from every one-level recess 210 of second grade runner is in two one-level recesses 210 of tertiary runner through the reposition of redundant personnel reentrant, in four one-level recesses 210 of tertiary runner, two one-level recesses 210 that are located the middle part still are connected with two second grade recesses 230 respectively, make the flue gas that flows out from tertiary runner reentrant second grade recess 230, the heat transfer effect has greatly been improved. The front end of the secondary groove 230 extends to the front of the heat exchange tube, and the structure forms a tapered flow passage which can guide the fluid to converge towards a rear wake vortex region of the tube, so that the development of the rear wake vortex of the tube is effectively inhibited, the size of a heat exchange weak region is reduced, and the friction loss caused by the wake vortex formed by the separation of a boundary layer is reduced.
In some embodiments, the primary grooves 210 and the secondary grooves 230 may have a bent extension, which also improves the heat exchange effect of the flue gas flowing through the fin body 100.
In this embodiment, the primary groove 210 of the primary flow channel extends to the rear side of the fin body 100, and the secondary groove 230 extends to the front side of the fin body 100. That is, when the flue gas flows through the fin body 100, part of the flue gas directly enters from the primary grooves 210 of the primary flow channels, and then directly flows out of the fin body 100 from the secondary grooves 230.
In this embodiment, the heat exchange flow channel further includes a through hole 220 disposed on the fin body 100, a center of the through hole 220 is located on a central line of the primary groove 210 of the primary flow channel, and the through hole 220 is located in front of the primary groove 210 of the primary flow channel. A heat exchange weak area is arranged in front of the primary groove 210 on the fin body 100, smoke flows on the fin body 100 and belongs to low Reynolds number flow, a viscous bottom layer and a main stream fluid have no obvious limit, and a through hole 220 is formed in the heat exchange weak area of the fin body 100, so that the viscous bottom layer can be damaged, the mixing of a near-wall-surface low-temperature fluid and a main stream high-temperature fluid can be enhanced, and the heat exchange is enhanced; in addition, the material consumption can be reduced, and the manufacturing cost can be saved.
In this embodiment, the through hole 220 is oval. The oval through holes 220 can further improve the mixing effect of the low-temperature fluid and the high-temperature fluid and enhance heat exchange. In some embodiments, the short axis configuration of the elliptical through-holes 220 faces the windward side to further enhance heat exchange.
In this embodiment, in any two adjacent gas passages, the diameter of the primary groove 210 of the gas passage located on the front side is D1, the diameter of the primary groove 210 of the gas passage located on the rear side is D2, and the ratio of D1 to D2 is 0.78. The diameter of the primary groove 210 located at the front side is gradually decreased in the proportional range compared with the diameter of the primary groove 210 located at the rear side, ensuring that a good heat exchange effect is achieved.
In this embodiment, in any two adjacent gas passages, the length of the primary groove 210 of the gas passage located on the front side is H1, the length of the primary groove 210 of the gas passage located on the rear side is H2, and the ratio of H1 to H2 is 0.9. The length of the primary groove 210 located at the front side is gradually decreased in the ratio range compared to the length of the primary groove 210 located at the rear side.
In this embodiment, the side of the opening 200 has a flange. And the direction of the flanging is the same as the concave direction of the groove. The peripheral heat exchange tube inserted into the opening 200 can be abutted to the turned edge and welded with the heat exchange tube by the turned edge, so that the heat exchange tube is more convenient and faster.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made without departing from the spirit of the present invention within the knowledge of those skilled in the art.
Claims (10)
1. The utility model provides a multistage crotch type fin which characterized in that: including fin body (100), be provided with on fin body (100):
more than two openings (200) which are linearly arranged along the left and right direction;
the heat exchange flow channel is arranged between any two adjacent openings (200), the heat exchange flow channel comprises a plurality of gas channels which are sequentially communicated from back to front, each gas channel comprises a primary groove (210) arranged on the fin body (100), and at least one primary groove (210) in each gas channel is arranged;
in any two adjacent gas channels, the primary groove (210) of the gas channel positioned on the front side is communicated with the primary groove (210) of the gas channel positioned on the rear side.
2. The multi-stage crotch-type fin according to claim 1, characterized in that: in any two adjacent gas channels, the primary groove (210) of the gas channel positioned at the rear side is connected with at least two primary grooves (210) of the gas channel positioned at the front side.
3. The multi-stage crotch-type fin according to claim 2, characterized in that: three gas channels are sequentially arranged in any heat exchange flow channel from back to front, the gas channel positioned at the rearmost side is a first-stage flow channel, the gas channel positioned at the middle part is a second-stage flow channel, the gas channel positioned at the rearmost side is a third-stage flow channel, the first-stage flow channel comprises one first-stage groove (210), the second-stage flow channel comprises two first-stage grooves (210), the third-stage flow channel comprises four first-stage grooves (210), the rear ends of the two first-stage grooves (210) of the second-stage flow channel are connected with the front end of the first-stage groove (210) of the first-stage flow channel, the rear ends of the any two first-stage grooves (210) of the third-stage flow channel are connected with the front end of one first-stage groove (210) of the second-stage flow channel, the rear ends of the other two first-stage grooves (210) of the third-stage flow, two of the three-stage flow channels positioned in the middle of the two first-stage grooves (210) are connected with two second-stage grooves (230) at the front ends.
4. The multi-stage crotch-type fin according to claim 3, characterized in that: the primary grooves (210) of the primary flow channels extend to the rear side of the fin body (100), and the secondary grooves (230) extend to the front side of the fin body (100).
5. The multi-stage crotch-type fin according to claim 3, characterized in that: the heat exchange flow channel further comprises a through hole (220) formed in the fin body (100), the center of the through hole (220) is located on the central line of the first-stage groove (210) of the first-stage flow channel, and the through hole (220) is located in front of the first-stage groove (210) of the first-stage flow channel.
6. The multi-stage crotch-type fin according to claim 5, wherein: the through hole (220) is oval.
7. The multi-stage crotch-type fin according to claim 1, characterized in that: in any two adjacent gas channels, the diameter of the primary groove (210) of the gas channel positioned on the front side is D1, the diameter of the primary groove (210) of the gas channel positioned on the rear side is D2, and the ratio of D1 to D2 is 0.6-0.9.
8. The multi-stage crotch-type fin according to claim 1, characterized in that: in any two adjacent gas channels, the length of the primary groove (210) of the gas channel positioned on the front side is H1, the length of the primary groove (210) of the gas channel positioned on the rear side is H2, and the ratio of H1 to H2 is 0.8-1.
9. The multi-stage crotch-type fin according to claim 1, characterized in that: the side of the opening hole (200) is provided with a flanging.
10. A heat exchanger, characterized by: the heat exchange tube comprises a heat exchange tube and further comprises a plurality of multi-stage crotch-shaped fins which are uniformly arranged and are as claimed in any one of claims 1 to 9, the openings (200) in the multi-stage crotch-shaped fins are used for the heat exchange tube to penetrate, the depth of the one-stage groove (210) of any one multi-stage crotch-shaped fin is h, the distance between any two adjacent multi-stage crotch-shaped fins is d, and the ratio of h to d is 0.35-0.5.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921664146.0U CN211012620U (en) | 2019-09-30 | 2019-09-30 | Multi-stage crotch type fin and heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921664146.0U CN211012620U (en) | 2019-09-30 | 2019-09-30 | Multi-stage crotch type fin and heat exchanger |
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| CN211012620U true CN211012620U (en) | 2020-07-14 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595249A (en) * | 2019-09-30 | 2019-12-20 | 广东万和热能科技有限公司 | Multi-stage crotch type fin and heat exchanger |
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2019
- 2019-09-30 CN CN201921664146.0U patent/CN211012620U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110595249A (en) * | 2019-09-30 | 2019-12-20 | 广东万和热能科技有限公司 | Multi-stage crotch type fin and heat exchanger |
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