CN110749215A - Multi-stage flow-dividing brazing heat exchanger plate set - Google Patents

Multi-stage flow-dividing brazing heat exchanger plate set Download PDF

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Publication number
CN110749215A
CN110749215A CN201911242835.7A CN201911242835A CN110749215A CN 110749215 A CN110749215 A CN 110749215A CN 201911242835 A CN201911242835 A CN 201911242835A CN 110749215 A CN110749215 A CN 110749215A
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CN
China
Prior art keywords
ridge
plate
heat exchange
valley
heat exchanger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911242835.7A
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Chinese (zh)
Inventor
帅伟强
韩维哲
吴耀华
姚建
徐晓栋
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
JIANGSU WEALVIELD WATER HEATER CO Ltd
Original Assignee
JIANGSU WEALVIELD WATER HEATER CO Ltd
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Publication date
Application filed by JIANGSU WEALVIELD WATER HEATER CO Ltd filed Critical JIANGSU WEALVIELD WATER HEATER CO Ltd
Priority to CN201911242835.7A priority Critical patent/CN110749215A/en
Publication of CN110749215A publication Critical patent/CN110749215A/en
Priority to EP20020579.7A priority patent/EP3832243B1/en
Pending legal-status Critical Current

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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
    • 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
    • F28D9/0043—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 plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/0056—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 plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another with U-flow or serpentine-flow inside conduits; with centrally arranged openings on the plates
    • 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
    • F28D9/0043—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 plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another
    • F28D9/005—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 plates having openings therein for circulation of at least one heat-exchange medium from one conduit to another the plates having openings therein for both heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/044—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being pontual, e.g. dimples
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/042—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element
    • F28F3/046—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of local deformations of the element the deformations being linear, e.g. corrugations
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/02—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations
    • F28F3/04—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element
    • F28F3/048—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being integral with the element in the form of ribs integral with the element or local variations in thickness of the element, e.g. grooves, microchannels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning
    • F28F3/083—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning capable of being taken apart

Abstract

The invention belongs to the technical field of heat exchangers, and particularly relates to a multi-stage shunting brazing heat exchanger plate group which comprises at least two pairs of unit plate groups, wherein each pair of unit plate groups comprises a first plate and a second plate which are arranged in a stacked mode, each first plate and each second plate comprise a main panel and surrounding baffles, each main panel comprises a shunting area, a main heat exchange area and a confluence area, and shunting ribs are arranged between the shunting areas and the main heat exchange areas and between the main heat exchange areas and the confluence areas and used for uniformly distributing media flowing into the main heat exchange areas from the shunting areas and media flowing into the confluence areas from the main heat exchange areas. The main panel of the heat exchange plate is provided with the shunting area, the main heat exchange area and the converging area, and the shunting ribs are arranged between the shunting area and the main heat exchange area and between the main heat exchange area and the converging area, so that the uniform distribution of media is facilitated, and the heat exchange performance and the heat exchange stability of the heat exchanger are improved.

Description

Multi-stage flow-dividing brazing heat exchanger plate set
Technical Field
The invention belongs to the technical field of heat exchangers, and particularly relates to a multi-stage flow-dividing brazed heat exchanger plate group.
Background
The brazed plate heat exchanger is one efficient heat exchanger produced through brazing and includes one series of corrugated metal sheets. The various plates form channels between them through which heat is exchanged. Compared with the conventional shell-and-tube heat exchanger, the heat transfer coefficient of the heat exchanger is much higher under the condition of the same flow resistance and pump power consumption, and the heat exchanger tends to replace the shell-and-tube heat exchanger in an applicable range.
In the design process of the brazed plate heat exchanger in the market at present, the circulation performance of media near the middle part of a plate sheet is not considered due to the circulation performance of the media at two ends of the heat exchanger, and the condition that the media in the heat exchanger circulate unevenly is aggravated along with the increase of the distance, so that the performance of the heat exchanger is reduced or is not stable enough.
Disclosure of Invention
In order to solve the problem that the performance of a heat exchanger is reduced or not stable enough due to poor medium circulation uniformity of the existing heat exchanger, the invention discloses a multi-stage flow-dividing brazing heat exchanger plate set.
In order to achieve the purpose, the invention adopts the following technical scheme:
the multi-stage flow dividing brazing heat exchanger plate set comprises at least two pairs of unit plate sets, each pair of unit plate sets comprises a first plate and a second plate which are arranged in a stacked mode, each first plate and each second plate comprises a main panel and surrounding baffle plates, each main panel comprises a flow dividing region, a main heat exchange region and a flow converging region, and flow dividing ribs are arranged between the flow dividing regions and the main heat exchange regions and between the main heat exchange regions and the flow converging regions and used for uniformly distributing media flowing into the main heat exchange regions from the flow dividing regions and media flowing into the flow converging regions from the main heat exchange regions.
Preferably, the flow splitting region is provided with a plurality of first convex ridges, valley I is formed between adjacent first convex ridges, the included angle between the first convex ridges and the flow splitting ribs is α, the main heat exchange region is provided with a plurality of second convex ridges, valley II is formed between adjacent second convex ridges, the included angle between the second convex ridges and the flow splitting ribs is β, the flow converging region is provided with a plurality of third convex ridges, valley III is formed between adjacent third convex ridges, the included angle between the third convex ridges and the flow splitting ribs is gamma, the α is not equal to β, and the β is not equal to gamma.
Preferably, the brazed heat exchanger plate package described above is used in an evaporator, said α being equal to γ and being between 30 and 45 ° and β being between 20 and 30 °.
Preferably, the brazed heat exchanger plate package described above is used in a condenser, said α being equal to γ and being 20-30 ° and β being 30-45 °.
Preferably, the first ridge, the second ridge and the third ridge are inclined towards the same direction; the second plate is rotated 180 ° with respect to the first plate; the heights of the first raised ridge, the second raised ridge and the third raised ridge are equal and equal to twice the height of the flow dividing rib.
Preferably, the second valley of the first plate is provided with a plurality of convex grooves protruding towards the second direction of the convex ridge, and the second convex ridge of the second plate is provided with a plurality of concave grooves recessed towards the second direction of the concave valley.
Preferably, the convex grooves and the concave grooves have the same size and are respectively and uniformly distributed on the corresponding second valleys and the corresponding second ridges.
Preferably, the second raised ridge of the first plate is provided with a raised ridge recess recessed towards the second valley direction along the top of the second raised ridge, and the second valley of the second plate is provided with a valley projection protruding towards the second raised ridge direction along the bottom of the second raised ridge, so that the turbulence of the medium in the flow channel is increased.
Preferably, the heights of the ridge depressions and the valley projections are equal to each other and equal to half of the height of the second ridge.
Preferably, the top of the second ridge of the first plate is divided into a first second ridge and a second ridge by the ridge recess, the bottom of the second valley of the second plate is divided into a first second valley and a second valley by the valley projection, the top width of the first second ridge, the top width of the second ridge, the bottom width of the second valley of the first plate, the bottom width of the first valley, the bottom width of the second valley and the top width of the ridge of the second plate are all equal, the bottom width of the ridge recess and the top width of the valley projection are equal, and the top width of the first ridge is greater than the top width of the valley projection.
The invention has the following beneficial effects:
(1) the main panel of the heat exchange plate is provided with the shunting area, the main heat exchange area and the converging area, and shunting ribs are arranged between the shunting area and the main heat exchange area and between the main heat exchange area and the converging area, so that a medium flowing from the shunting area to the main heat exchange area can be uniformly distributed at the shunting ribs, the medium can uniformly flow into the main heat exchange area, after the heat exchange of the medium in the main heat exchange area is finished, the medium is secondarily distributed through the shunting ribs between the main heat exchange area and the converging area and uniformly converged together, and flows to an outlet position through the converging area;
(2) the heat exchange plate sheet can adjust the flow velocity of a medium in three different areas by adjusting the size of an included angle α between the first convex ridge and the flow distribution rib, an included angle β between the second convex ridge and the flow distribution rib and an included angle gamma between the third convex ridge and the flow distribution rib, and the heat exchange plate sheet is determined to be used for an evaporator or a condenser by adjusting the size of β;
(3) the convex grooves and the grooves are arranged to reduce the pressure drop in the flow channel and facilitate the medium to flow more quickly and uniformly, so that the heat exchange performance is improved;
(4) according to the invention, the concave convex ridge depressions are arranged at the tops of the convex ridge II of the first plate, and the convex concave valley bulges are arranged at the bottoms of the concave valley II of the second plate, so that the turbulence of a medium in a flow channel is increased, the heat exchange efficiency is improved, the accumulation of dirt can be effectively avoided, and a good dirt preventing effect is achieved.
Drawings
The invention is further illustrated with reference to the following figures and examples.
FIG. 1 is a schematic view of a heat exchange plate assembly according to the present invention;
FIG. 2 is a schematic view of the construction of a first plate of the present invention;
FIG. 3 is an enlarged view of a portion a of FIG. 2;
FIG. 4 is an enlarged view of portion b of FIG. 2;
FIG. 5 is a schematic view of the construction of a second plate of the present invention;
FIG. 6 is an enlarged view of portion c of FIG. 5;
FIG. 7 is an enlarged view of portion d of FIG. 5;
FIG. 8 is a top view of a pair of cell plate sets according to the present invention;
FIG. 9 is a cross-sectional view taken along line A-A of FIG. 8;
FIG. 10 is a cross-sectional view taken along line B-B of FIG. 8;
in the figure: 1. a first sheet; 2. a second sheet; 3. a baffle plate; 41. a shunting region; 411. a first convex ridge; 412. a valley I; 42. a main heat exchange zone; 421. a second convex ridge; 4211. a second ridge; 4212. a second ridge two; 422. a second valley; 4221. a second valley; 4222. a second valley two; 423. a convex groove; 424. a groove; 425. the convex ridge is concave; 426. the valley is convex; 43. a converging region; 431. a third convex ridge; 432. valley three; 44. and (4) distributing ribs.
Detailed Description
The present invention will now be described in further detail with reference to examples.
A multi-stage shunting brazing heat exchanger plate group comprises at least two pairs of unit plate groups, each pair of unit plate groups comprises a first plate 1 and a second plate 2 which are arranged in a stacking mode, each first plate 1 and each second plate 2 comprise a main panel and a surrounding baffle 3, and the multi-stage shunting brazing heat exchanger plate group is characterized in that: the main panel comprises a diversion area 41, a main heat exchange area 42 and a confluence area 43, wherein diversion ribs 44 are arranged between the diversion area 41 and the main heat exchange area 42 and between the main heat exchange area 42 and the confluence area 43, and are used for uniformly distributing media flowing into the main heat exchange area 42 from the diversion area 41 and media flowing into the confluence area 43 from the main heat exchange area 42. The arrangement of the flow dividing ribs 44 can enable the medium flowing from the flow dividing region 41 to the main heat exchange region 42 to be uniformly distributed at the flow dividing ribs 44, so that the medium can uniformly flow into the main heat exchange region 42, and after the medium completes heat exchange in the main heat exchange region 42, the medium is secondarily distributed through the flow dividing ribs 44 between the main heat exchange region 42 and the flow converging region 43, uniformly converged together, and flows to an outlet position through the flow converging region 43. In the whole process, the medium is uniformly distributed on two sides, so that the medium can more uniformly circulate in the whole flow channel, the heat exchange is favorably improved, and the long-term heat exchange stability is ensured.
In addition, because the main panel of the heat exchange plate is provided with a plurality of corrugated convex ridges and valleys, the heat exchange plate is easy to deform, and the arrangement of the flow dividing ribs 44 can provide effective support for the whole heat exchange plate, thereby improving the panel strength and being beneficial to improving the problem of processing deformation.
In a specific embodiment, as shown in fig. 2-8, the diversion area 41 is provided with a plurality of first ridges 411, a valley 412 is formed between adjacent first ridges 411, an included angle between the first ridges 411 and the diversion ribs 44 is α, the main heat transfer area 42 is provided with a plurality of second ridges 421, a valley 422 is formed between adjacent second ridges 421, an included angle between the second ridge 421 and the diversion ribs 44 is β, the confluence area 43 is provided with a plurality of third ridges 431, a valley 432 is formed between adjacent third ridges 431, an included angle between the third ridge 431 and the diversion ribs 44 is γ, α is not equal to β, β is not equal to γ, α is not equal to β, so that the medium does not directly flow from the diversion area 41 to the main heat transfer area 42, but first passes through the distribution of the diversion ribs 44 and then enters the main heat transfer area 42, β is not equal to γ, and the medium can also pass through the distribution and then enters the confluence area 43.
In one particular embodiment, as shown in fig. 8, where a brazed heat exchanger plate stack is used in an evaporator, α is equal to γ, 30-45 ° and β is 20-30 °. since evaporation is the process of converting liquid to vapor, setting the α (or γ) angle at a larger angle is more favorable for the liquid (or vapor) to rapidly flow into (or rapidly evaporate out of) the main heat exchange zone 42, thereby enhancing evaporation performance.
In one particular embodiment, as shown in fig. 8, where the brazed heat exchanger plate package is used in a condenser, α is equal to γ, which is 20-30 ° and β is 30-45 °. since condensation is the process of converting vapor to liquid, setting the α (or γ) angle at a larger angle is more favorable for the vapor (or liquid) to flow rapidly into (or out of) the primary heat exchange zone 42, thereby improving condensation performance.
In a specific embodiment, as shown in fig. 1, 9 and 10, the first ridge 411, the second ridge 421 and the third ridge 431 are all inclined toward the same direction; the second plate 2 is rotated 180 ° with respect to the first plate 1; the heights of the first ridge 411, the second ridge 421 and the third ridge 431 are all equal and equal to twice the height of the flow dividing rib 44.
In a specific embodiment, as shown in fig. 3-4 and fig. 6-7, the second valley 422 of the first plate 1 is provided with a plurality of convex grooves 423 protruding toward the second ridge 421, and the second ridge 421 of the second plate 2 is provided with a plurality of concave grooves 424 recessed toward the second valley 422. The convex groove 423 arranged on the second valley 422 and the concave groove 424 arranged on the second convex ridge 421 are beneficial to reducing pressure drop, and are beneficial to faster and more uniform circulation of the medium, and the heat exchange performance is improved.
In one embodiment, as shown in fig. 2 and 5, the grooves 423 and the grooves 424 are equal in size and are uniformly distributed on the corresponding valleys 422 and ridges 421.
In a specific embodiment, as shown in fig. 3-4 and 6-7, the second ridges 421 of the first plate 1 have along the top thereof ridge depressions 425 that are depressed in the direction of the second valleys 422, and the second valleys 422 of the second plate 2 have along the bottom thereof valley protrusions 426 that are raised in the direction of the second ridges 421, so as to increase turbulence of the medium in the flow channels. As shown by the dotted line with an arrow in fig. 9, the medium can form turbulent flow in the flow channel, which is not only beneficial to improving the heat exchange efficiency, but also can effectively avoid the accumulation of dirt, and has good dirt-proof effect.
In one particular embodiment, as shown in fig. 9-10, the ridge recesses 425 and the valley protrusions 426 have equal heights and are equal to one-half the height of the ridge two 421.
In a particular embodiment, as shown in fig. 3-4, 6-7, and 9-10, the top of the second ridge 421 of the first plate 1 is divided into a first second ridge 4211 and a second ridge 4212 by the ridge recesses 425, the bottom of the second valley 422 of the second plate 2 is divided into a first second valley 4221 and a second valley 4222 by the valley protrusions 426, the top width of the first second ridge 4211, the top width of the second ridge 4212, the bottom width of the second valley 422 of the first plate 1, the bottom width of the first second valley 4221, the bottom width of the second valley 4222, and the top width of the second ridge 421 of the second plate 2 are all equal, the bottom width of the ridge recesses 425 and the top width of the valley protrusions 426 are equal, and the top width of the first second ridge 4211 is greater than the top width of the valley protrusions 426.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.

Claims (10)

1. A multi-stage shunting brazed heat exchanger plate group comprises at least two pairs of unit plate groups, each pair of unit plate groups comprises a first plate (1) and a second plate (2) which are arranged in a stacked mode, the first plate (1) and the second plate (2) respectively comprise a main panel and surrounding baffle plates (3), and the multi-stage shunting brazed heat exchanger plate group is characterized in that: the main panel comprises a flow distribution area (41), a main heat exchange area (42) and a confluence area (43), wherein flow distribution ribs (44) are arranged between the flow distribution area (41) and the main heat exchange area (42) and between the main heat exchange area (42) and the confluence area (43) and are used for uniformly distributing media flowing into the main heat exchange area (42) from the flow distribution area (41) and media flowing into the confluence area (43) from the main heat exchange area (42).
2. The multi-stage flow dividing brazing heat exchanger plate group according to claim 1, wherein the flow dividing region (41) is provided with a plurality of first ridges (411), first valleys (412) are formed between adjacent first ridges (411), an included angle between each first ridge (411) and each flow dividing rib (44) is α, the main heat exchange region (42) is provided with a plurality of second ridges (421), second valleys (422) are formed between adjacent second ridges (421), an included angle between each second ridge (421) and each flow dividing rib (44) is β, the flow converging region (43) is provided with a plurality of third ridges (431), third valleys (432) are formed between adjacent third ridges (431), an included angle between each third ridge (431) and each flow dividing rib (44) is gamma, α is not equal to β, and β is not equal to gamma.
3. The multi-split flow brazed heat exchanger plate pack according to claim 2, wherein the brazed heat exchanger plate pack is for an evaporator, wherein α is equal to γ, and is 30-45 ° and β is 20-30 °.
4. The multi-split brazed heat exchanger plate package of claim 2, wherein the brazed heat exchanger plate package is for a condenser, the α is equal to γ, is 20-30 °, and the β is 30-45 °.
5. The multi-stage flow-splitting brazed heat exchanger plate pack of claim 2, wherein: the first ridge (411), the second ridge (421) and the third ridge (431) are inclined towards the same direction; the second plate (2) is rotated 180 ° with respect to the first plate (1); the heights of the first ridge (411), the second ridge (421) and the third ridge (431) are all equal and equal to twice the height of the flow dividing rib (44).
6. The multi-stage flow-splitting brazed heat exchanger plate pack of claim 2, wherein: the second concave groove (422) of the first plate (1) is provided with a plurality of convex grooves (423) protruding towards the second convex ridge (421), and the second convex ridge (421) of the second plate (2) is provided with a plurality of concave grooves (424) recessed towards the second concave groove (422).
7. The multi-stage flow-splitting brazed heat exchanger plate pack of claim 6, wherein: the convex grooves (423) and the concave grooves (424) are equal in size and are respectively and uniformly distributed on the corresponding second valleys (422) and the corresponding second ridges (421).
8. The multi-stage flow-splitting brazed heat exchanger plate pack of claim 2, wherein: the second raised ridge (421) of the first plate (1) is provided with a raised ridge recess (425) recessed towards the second recessed valley (422) along the top of the second raised ridge, and the second recessed valley (422) of the second plate (2) is provided with a recessed valley protrusion (426) protruding towards the second raised ridge (421) along the bottom of the second raised ridge, so that the turbulence of the medium in the flow channel is increased.
9. The multi-stage flow splitting brazed heat exchanger plate pack of claim 8, wherein: the ridge depressions (425) and the valley protrusions (426) have the same height and are equal to half the height of the second ridge (421).
10. The multi-stage flow splitting brazed heat exchanger plate pack of claim 8, wherein: the top of the second ridge (421) of the first plate (1) is divided into a first second ridge (4211) and a second ridge (4212) by the ridge recess (425), the bottom of the second valley (422) of the second plate (2) is divided into a first valley two (4221) and a second valley two (4222) by a valley protrusion (426), the top width of the first ridge II (4211), the top width of the second ridge II (4212), the bottom width of the valley II (422) of the first plate (1), the bottom width of the first valley II (4221), the bottom width of the second valley II (4222) and the top width of the ridge II (421) of the second plate (2) are all equal, the width of the bottom of the ridge recess (425) is equal to the width of the top of the valley protrusion (426), the top width of the second ridge (4211) is larger than that of the valley protrusion (426).
CN201911242835.7A 2019-12-06 2019-12-06 Multi-stage flow-dividing brazing heat exchanger plate set Pending CN110749215A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN201911242835.7A CN110749215A (en) 2019-12-06 2019-12-06 Multi-stage flow-dividing brazing heat exchanger plate set
EP20020579.7A EP3832243B1 (en) 2019-12-06 2020-12-01 Multi-stage flow distribution plate group for heat exchanger

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911242835.7A CN110749215A (en) 2019-12-06 2019-12-06 Multi-stage flow-dividing brazing heat exchanger plate set

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Publication Number Publication Date
CN110749215A true CN110749215A (en) 2020-02-04

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SE2250767A1 (en) * 2022-06-22 2023-12-23 Alfa Laval Corp Ab Plate heat exchanger
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SE528879C2 (en) * 2005-07-04 2007-03-06 Alfa Laval Corp Ab Heat exchanger plate, pair of two heat exchanger plates and plate package for plate heat exchanger
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JP5243623B2 (en) * 2009-02-04 2013-07-24 アルファ ラヴァル コーポレイト アクチボラゲット Plate heat exchanger
CN105793662B (en) * 2013-12-10 2020-03-10 舒瑞普国际股份公司 Heat exchanger with improved flow
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