CN108195212B - Brazing plate type heat exchanger - Google Patents
Brazing plate type heat exchanger Download PDFInfo
- Publication number
- CN108195212B CN108195212B CN201810155283.5A CN201810155283A CN108195212B CN 108195212 B CN108195212 B CN 108195212B CN 201810155283 A CN201810155283 A CN 201810155283A CN 108195212 B CN108195212 B CN 108195212B
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- Prior art keywords
- fluid distributor
- fluid
- heat exchange
- hemispherical
- heat exchanger
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- 238000005219 brazing Methods 0.000 title claims abstract description 20
- 239000012530 fluid Substances 0.000 claims abstract description 110
- 238000009826 distribution Methods 0.000 claims abstract description 36
- 238000003825 pressing Methods 0.000 claims abstract description 35
- 238000005516 engineering process Methods 0.000 claims abstract description 11
- 230000007704 transition Effects 0.000 claims description 29
- 239000007788 liquid Substances 0.000 claims description 10
- 238000004080 punching Methods 0.000 description 5
- 238000005493 welding type Methods 0.000 description 4
- 239000000126 substance Substances 0.000 description 3
- 238000010438 heat treatment Methods 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 206010063385 Intellectualisation Diseases 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000009510 drug design Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 238000000855 fermentation Methods 0.000 description 1
- 230000004151 fermentation Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000009987 spinning Methods 0.000 description 1
- 230000001954 sterilising effect Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
Classifications
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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
- F28D9/0043—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
- 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
Landscapes
- 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 discloses a lower heat exchange plate, a fluid distributor and an upper heat exchange plate from bottom to top respectively; the fluid distributor is respectively provided with a lower fluid distributor pressing sheet, a lower fluid distributor limiting block, a fluid distribution pipe, an upper fluid distributor limiting block and an upper fluid distributor pressing sheet from bottom to top; the upper and lower pressing sheets of the fluid distributor are respectively connected with the upper and lower heat exchange sheets by adopting an integral stamping technology; the upper limit block and the lower limit block of the fluid distributor and the fluid distribution pipe are respectively connected with the upper tabletting and the lower tabletting of the fluid distributor by adopting a brazing technology. The invention has the advantages of small volume, high heat exchange efficiency, accurate flow control, difficult blockage and the like.
Description
Technical Field
The present invention relates to plate heat exchangers, and in particular to heat exchanger fins and fluid distributors in brazed plate heat exchangers.
Background
The plate heat exchanger is ideal equipment for liquid-liquid and liquid-vapor heat exchange, has the advantages of high heat exchange efficiency, small heat loss, compact and light structure, small occupied area, long service life and the like, and is widely applied to the departments of metallurgy, mine, petroleum, chemical industry, electric power, medicine, food, chemical fiber, paper making, light spinning, ships, heat supply and the like. And it can be used for heating, cooling, evaporating, condensing, sterilizing, disinfecting, waste heat recovering and other conditions. The plate heat exchanger mainly has two major types of detachable and welding type, and compared with the welding type heat exchanger, the welding type heat exchanger has the advantages of high temperature bearing capacity, high pressure bearing capacity, high corrosion resistance and the like, so that the welding type heat exchanger has wider application range.
The welded heat exchanger can be divided into a half-welded heat exchanger, an all-welded heat exchanger, a plate-type heat exchanger and a brazing plate type heat exchanger. Because brazing has the advantages of low heating temperature, smooth joint, small change of structure and mechanical properties, accurate size of a workpiece and the like, the brazing plate type heat exchanger can be used as a condenser and an evaporator in the refrigeration industry and can be used as a cooler for alcohol fermentation and the like in the chemical industry.
Although the brazing sheet type heat exchanger has the advantages, as the miniaturization and intellectualization requirements of products such as household appliances are higher and higher, the brazing sheet type heat exchanger is used as a part of the products, and has the problems of large volume, inaccurate flow control, easy blockage of a distribution block and the like. How to reduce the volume of the brazing sheet type heat exchanger while precisely ensuring the heat exchange efficiency is a difficult problem in the industry.
At present, the surfaces of the heat exchange plates of the brazing plate type heat exchanger often adopt herringbone waves, straight strip waves and nodular waves, and the herringbone waves have advantages and disadvantages. However, from the aspect of the surface area occupied by the unit volume, all three waves are inferior to spherical waves, so that the volume of the heat exchanger can be effectively reduced by adopting spherical waves for the heat exchange plates of the brazing plate type heat exchanger. However, the use of spherical corrugations for heat exchange plates effectively increases the heat exchange area per unit volume, but also has the disadvantage of high resistance to fluid flow, which requires a rational design of the fluid distributor to improve the above disadvantages. Thus, there is a need for improved brazed plate heat exchanger fins and fluid distributors.
Disclosure of Invention
The invention aims to solve the technical problems that the common brazing plate type heat exchanger has large volume, inaccurate flow control of a fluid distributor and the like, and provides a novel brazing plate type heat exchanger.
The invention provides a brazed heat exchanger, which adopts the following technical scheme: a brazing sheet type heat exchanger, which comprises a lower heat exchange sheet, a fluid distributor and an upper heat exchange sheet from bottom to top; the fluid distributor is respectively provided with a lower fluid distributor pressing sheet, a lower fluid distributor limiting block, a fluid distribution pipe, an upper fluid distributor limiting block and an upper fluid distributor pressing sheet from bottom to top; the upper and lower pressing sheets of the fluid distributor are respectively connected with the upper and lower heat exchange sheets by adopting an integral stamping technology; the upper limit block and the lower limit block of the fluid distributor and the fluid distribution pipe are respectively connected with the upper tabletting and the lower tabletting of the fluid distributor by adopting a brazing technology.
Preferably, the lower heat exchange plate surface is provided with hemispherical convex blocks and transitional convex blocks; the surface of the lower heat exchange plate is divided into a dense area and a sparse area according to the distribution density of the hemispherical convex blocks, the spherical center spacing size of the hemispherical convex blocks in the dense area is 6.5-7.5 mm, the spherical center spacing size of the hemispherical convex blocks in the sparse area is 5.5-6.1 mm, and the radius range of the hemispherical convex blocks is 1.5-2.5 mm; the transition protruding blocks are distributed in gaps surrounded by the hemispherical protruding blocks in the dense area, the shape of the transition protruding blocks is crossed cross protruding lines, and a plurality of different distribution schemes can be adopted according to whether the transition protruding blocks extend to the hemispherical protruding blocks or not; the width dimension of the cross convex line is 0.4-0.6 mm, the stamping angle of the cross convex line is 110-120 degrees, and the stamping height of the cross convex line is 0.4-0.6 mm.
Preferably, the surface of the upper heat exchange plate is provided with hemispherical pits and transition pits; the surface of the upper heat exchange plate is divided into a dense area and a sparse area according to the distribution density of the hemispherical pits, the spherical center spacing size of the hemispherical pits in the dense area is 6.5-7.5 mm, the spherical center spacing size of the hemispherical pits in the sparse area is 5.5-6.1 mm, and the radius of the hemispherical pits is 1.5-2.5 mm; the transition pits are distributed in gaps surrounded by the hemispherical pits in the dense area, the shape of the transition pits is cross concave patterns, and a plurality of different distribution schemes can be adopted according to whether the transition pits extend to the hemispherical pits or not; the width dimension of the cross-shaped concave patterns is 0.4-0.6 mm, the stamping angle range of the cross-shaped concave patterns is 110-120 degrees, and the stamping depth of the cross-shaped concave patterns is 0.4-0.6 mm.
Preferably, the surface structures of the lower heat exchange plate and the upper heat exchange plate are symmetrical, and the corresponding sizes are the same.
Preferably, a plurality of semi-cylindrical grooves are uniformly distributed on the surface of the lower pressing sheet of the fluid distributor, the equipartition angle of the semi-cylindrical grooves is 30-60 degrees, and the diameter of the semi-cylindrical grooves is 3-5 mm; the lower pressing piece surface of the fluid distributor is provided with annular protrusions, the stamping angle of the annular protrusions is 80-100 degrees, the stamping height of the annular protrusions is 1.5-2.5 mm, and the width of the annular protrusions is 2.0-2.4 mm.
Preferably, a plurality of semi-cylindrical convex grooves are uniformly distributed on the surface of the upper pressing sheet of the fluid distributor, the equipartition angle of the semi-cylindrical convex grooves is 30-60 degrees, and the diameter of the semi-cylindrical convex grooves is 3-5 mm; the upper pressing surface of the fluid distributor is provided with an annular concave, the stamping angle of the annular concave is 80-100 degrees, the stamping height of the annular concave is 1.5-2.5 mm, and the width of the annular concave is 2.0-2.4 mm.
Preferably, the lower pressing piece of the fluid dispenser and the upper pressing piece of the fluid dispenser are of symmetrical structures, and the corresponding sizes are the same in value.
Preferably, the fluid distribution tube has a tapered bore; the diameter of the liquid outlet of the fluid distribution pipe is 0.7-1.3 mm, the outer diameter of the fluid distribution pipe is 2.9-4.9 mm, the taper of the conical inner hole of the fluid distribution pipe is 1:12-1:10, and the length of the fluid distribution pipe is 6-7 mm.
Compared with the prior art, the invention has the advantages that:
1. The upper heat exchange plate and the lower heat exchange plate respectively adopt hemispherical pits and hemispherical bumps, and the heat exchange area of a closed cavity area formed by the hemispherical pits and the hemispherical bumps is large.
2. According to the invention, the gaps between the hemispherical concave pits and hemispherical convex blocks of the upper heat exchange plate and the lower heat exchange plate respectively adopt crossed cross concave grains and crossed cross convex grains, so that the heat exchange area is further increased, and the rigidity of the heat exchange plates is improved.
3. The hemispherical concave pits, the crossed cross concave patterns and the hemispherical convex block crossed cross convex patterns adopted by the upper heat exchange plate and the lower heat exchange plate can enable fluid to generate turbulence at a lower Reynolds number, and the heat exchange efficiency is high.
4. The upper and lower pressing sheets and the upper and lower heat exchange sheets of the fluid distributor adopt an integrated stamping technology, so that the manufacturing process is simple and the cost is low;
5. the distributing pipe can be processed by a numerical control machine or precisely cast, and has accurate size, so that the flow of the fluid distributor is accurately controlled.
6. According to the invention, the fluid distribution pipe adopts a conical inner hole structure, impurities in liquid are not easy to deposit, the speed of the fluid at the liquid outlet of the fluid distribution pipe is increased, and the fluid is more easy to generate turbulence in the cavity of the heat exchange plate.
7. The invention adopts a plurality of fluid distribution pipes, effectively overcomes the flow resistance of the cavity of the heat exchange plate, and is less prone to blockage.
Drawings
Fig. 1 is a schematic structural view of the present invention, wherein 1 is a lower cover plate, 2 is a fluid distribution pipe, and 3 is an upper cover plate.
Fig. 2 is an assembly schematic diagram of the present invention, wherein a is a liquid inlet angular hole, B is a closed angular hole, C is a closed angular hole, and D is a liquid outlet angular hole.
Fig. 3 is a schematic view of a lower cover plate of the present invention, wherein 1.1 is a lower cover plate of a fluid distributor, 1.2 is a lower heat exchanger plate, 1.2.1 is a hemispherical bump of the lower heat exchanger plate, and 1.2.2 is a transition bump of the lower heat exchanger plate.
Fig. 4 is a cross-sectional view of hemispherical bosses of a lower plate according to the present invention.
Fig. 5 is a lower plate transition bump arrangement I of the present invention (transition bumps do not extend to hemispherical bumps).
Fig. 6 is a lower plate transition bump arrangement II (transition bumps extending to hemispherical bumps) of the present invention.
FIG. 7 is a cross-sectional view of a transition tab of a lower plate according to the present invention.
Fig. 8 is a schematic view of a lower cover plate of the fluid dispenser according to the present invention, wherein 1.1.1 is a lower pressing sheet of the fluid dispenser, and 1.1.2 is a lower stopper of the fluid dispenser.
Fig. 9 is a front view of a lower tablet of a fluid dispenser according to the present invention.
Fig. 10 is a cross-sectional view of a lower cover plate of the fluid dispenser of the present invention.
Fig. 11 is a schematic view of an upper cover plate of the present invention, wherein 3.1 is the upper cover plate of the fluid distributor, 3.2 is the upper heat exchanger plate, 3.2.1 is the hemispherical pit of the upper heat exchanger plate, and 3.2.2 is the transition pit of the upper heat exchanger plate.
FIG. 12 is a cross-sectional view of hemispherical depressions in an upper fin according to the present invention.
Fig. 13 is an upper plate transition pocket arrangement scheme I of the present invention (transition pockets do not extend to hemispherical pockets).
Fig. 14 is an upper plate transition dimple arrangement II (transition dimple verification to hemispherical dimple) in the present invention.
FIG. 15 is a cross-sectional view of a transition pocket in an upper plate in accordance with the present invention.
Fig. 16 is a schematic view of the upper cover plate of the fluid dispenser of the present invention, wherein 3.1.1 is the upper tablet of the fluid dispenser.
Fig. 17 is an elevation view of an upper sheeting of a fluid dispenser of the present invention.
Fig. 18 is a cross-sectional view of the upper cover of the fluid dispenser of the present invention, wherein 3.1.1 is the upper pressure piece of the fluid dispenser and 3.1.2 is the upper stopper of the fluid dispenser.
Fig. 19 is a cross-sectional view of a fluid distribution tube in accordance with the present invention.
DETAILED DESCRIPTION OF EMBODIMENT (S) OF INVENTION
The present invention is described in further detail below with reference to the accompanying drawings.
The invention provides a brazing plate type heat exchanger, which adopts the following specific technical scheme: the heat exchanger comprises heat exchange plates which are sequentially stacked and brazed together, a fluid distributor is arranged between two adjacent heat exchange plates, the whole heat exchanger is composed of two heat exchange plates which are brazed up and down and units of the fluid distributor, and the heat exchange plates are respectively a lower cover plate 1, a fluid distribution pipe 2 and an upper cover plate 3 from bottom to top, as shown in figure 1. The fluid distributing pipe 2 is connected with the lower cover plate 1 and the upper cover plate 2 in a brazing mode respectively, as shown in fig. 2, wherein A is a liquid inlet angle hole, B is a closed angle hole, C is a closed angle hole, and D is a liquid outlet angle hole.
The lower cover plate comprises a fluid distributor lower cover plate 1.1 and lower heat exchanger plates 1.2, as shown in fig. 3. The surface of the lower heat exchange plate 1.2 is provided with hemispherical convex blocks 1.2.1 and transitional convex blocks 1.2.2. The surface of the lower heat exchange plate 1.2 is divided into X, Y, Z areas according to the distribution density of the hemispherical convex blocks 1.2.1, the center-to-center distance dimension b X、Z =7mm of the hemispherical convex blocks 1.2.1 in X, Z areas, the center-to-center distance dimension b Y =5.8 mm of the hemispherical convex blocks 1.2.1 in Y areas, and the radius a=2 mm of the hemispherical convex blocks 1.2.1 are shown in fig. 4. The transition bumps 1.2.2 are distributed in the gaps surrounded by the hemispherical bumps 1.2.1 in the Y area. The top view of the transition protrusion 1.2.2 is a cross-ridge, which can be divided into two schemes of fig. 5 and 6 according to whether it extends to the hemispherical protrusion 1.2.1. The width dimension c=0.5 mm of the cross ridge, the punching angle d=110°, and the punching height e=0.5 mm are shown in fig. 5,6 and 7. The lower cover plate 1.1 of the fluid distributor comprises a lower pressing sheet 1.1.1 of the fluid distributor and a lower limiting block 1.1.2 of the fluid distributor, wherein the lower pressing sheet 1.1.1 of the fluid distributor and the lower heat exchange plate 1.2 adopt an integral stamping technology, and the lower limiting block 1.1.2 of the distributor is connected with the lower pressing sheet 1.1.1 of the fluid distributor by adopting a brazing technology, as shown in fig. 8. As shown in fig. 9 and 10, the front view and the sectional view of the lower pressing sheet 1.1.1 of the fluid dispenser are shown, 3 semi-cylindrical grooves are uniformly distributed in the lower pressing sheet 1.1.1 of the fluid dispenser, the equipartition angle f=45° of the semi-cylindrical grooves, and the diameter g=4 mm of the semi-cylindrical grooves; the above-described fluid dispenser lower press sheet 1.1.1 has an annular protrusion having a punching angle h=90°, a punching height dimension i=2 mm, and a width dimension j=2.2 mm.
The upper plate comprises a fluid distributor upper plate 3.1 and lower heat exchanger plates 3.2, as shown in fig. 11. The surface of the upper heat exchange plate 3.2 is provided with hemispherical pits 3.2.1 and transition pits 3.2.2. The surface of the upper heat exchange plate 3.2 is divided into U, V, W areas according to the distribution density of the hemispherical pits 3.2.1, the center-to-center distance dimension l U、W =7mm of the hemispherical pits 3.2.1 in U, W areas, the center-to-center distance dimension l V =5.8 mm of the hemispherical pits 3.2.1 in v areas, and the radius k=2 mm of the hemispherical pits 3.2.1 as shown in fig. 12. The transition pits 3.2.2 are distributed in a gap surrounded by the hemispherical pits 3.2.1 in the V area, and the top view of the transition pits 3.2.2 is cross-shaped concave patterns, which can be divided into two schemes of fig. 13 and 14 according to whether the transition pits extend to the hemispherical pits 3.2.1. The width dimension m=0.5 mm of the cross-shaped concave patterns, the pressing angle n=110°, and the pressing depth o=0.5 mm are shown in fig. 13, 14 and 15. The upper cover plate 3.1 of the fluid distributor comprises an upper pressing sheet 3.1.1 of the fluid distributor and a limiting block 3.1.2 of the fluid distributor, wherein the upper pressing sheet 3.1.1 of the fluid distributor and the upper heat exchange plate 3.2 adopt an integral punching technology, and the limiting block 3.1.2 of the distributor is connected with the upper pressing sheet 3.1.1 of the fluid distributor by adopting a brazing technology, as shown in fig. 16 and 18. The front view and the section view of the upper pressing sheet 3.1.1 of the fluid distributor are shown in fig. 17 and 18, 3 semi-cylindrical convex grooves are uniformly distributed on the upper pressing sheet 3.1.1 of the fluid distributor, the semi-cylindrical convex grooves have an equipartition angle p=45°, and the semi-cylindrical convex groove diameter q=4 mm; the above-mentioned fluid dispenser upper press sheet 1.1.1 has an annular depression with a stamping angle r=90°, a stamping depth dimension s=2 mm, and a width dimension t=2.2 mm.
The fluid distribution tube bore is a tapered bore as shown in fig. 19. The diameter u=1mm of the liquid outlet of the fluid distribution pipe; the outer diameter v=3.9 mm of the fluid distribution pipe; the taper of the fluid distribution pipe taper hole w=1:11; the fluid distribution tube length x=6.6 mm.
The foregoing is only illustrative of the preferred embodiments of the application, and it will be appreciated by those skilled in the art that various changes in the features and embodiments may be made and equivalents may be substituted without departing from the spirit and scope of the application. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the application without departing from the essential scope thereof. Therefore, it is intended that the application not be limited to the particular embodiment disclosed, but that the application will include all embodiments falling within the scope of the appended claims.
Claims (6)
1. A brazed plate heat exchanger, characterized in that: the lower heat exchange plate, the fluid distributor and the upper heat exchange plate are respectively arranged from bottom to top; the fluid distributor is respectively provided with a lower fluid distributor pressing sheet, a lower fluid distributor limiting block, a fluid distribution pipe, an upper fluid distributor limiting block and an upper fluid distributor pressing sheet from bottom to top; the upper and lower pressing sheets of the fluid distributor are respectively connected with the upper and lower heat exchange sheets by adopting an integral stamping technology; the upper limit block and the lower limit block of the fluid distributor and the fluid distribution pipe are respectively connected with the upper tabletting and the lower tabletting of the fluid distributor by adopting a brazing technology; the surface of the lower heat exchange plate is provided with hemispherical convex blocks and transitional convex blocks; the surface of the lower heat exchange plate is divided into a dense area and a sparse area according to the distribution density of the hemispherical convex blocks, the spherical center spacing size of the hemispherical convex blocks in the dense area is 6.5-7.5 mm, the spherical center spacing size of the hemispherical convex blocks in the sparse area is 5.5-6.1 mm, and the radius range of the hemispherical convex blocks is 1.5-2.5 mm; the transition protruding blocks are distributed in gaps surrounded by the hemispherical protruding blocks in the dense area, and the shape of the transition protruding blocks is crossed cross convex lines; the width dimension of the crossed convex pattern is 0.4-0.6 mm, the stamping angle of the crossed convex pattern is 110-120 degrees, and the stamping height of the crossed convex pattern is 0.4-0.6 mm; the surface of the upper heat exchange plate is provided with hemispherical pits and transition pits; the surface of the upper heat exchange plate is divided into a dense area and a sparse area according to the distribution density of the hemispherical pits, the spherical center spacing size of the hemispherical pits in the dense area is 6.5-7.5 mm, the spherical center spacing size of the hemispherical pits in the sparse area is 5.5-6.1 mm, and the radius of the hemispherical pits is 1.5-2.5 mm; the transition pits are distributed in gaps surrounded by hemispherical pits in the dense area, and are in the shape of crossed cross concave patterns; the width dimension of the cross-shaped concave patterns is 0.4-0.6 mm, the stamping angle range of the cross-shaped concave patterns is 110-120 degrees, and the stamping depth of the cross-shaped concave patterns is 0.4-0.6 mm.
2. A brazed plate heat exchanger according to claim 1, wherein: the surface structures of the lower heat exchange plate and the upper heat exchange plate are symmetrical, and the corresponding sizes are the same.
3. A brazed plate heat exchanger according to claim 1, wherein: the surface of the lower pressing piece of the fluid distributor is uniformly provided with a plurality of semi-cylindrical grooves, the equipartition angle of the semi-cylindrical grooves is 30-60 degrees, and the diameter of the semi-cylindrical grooves is 3-5 mm; the lower pressing piece surface of the fluid distributor is provided with annular protrusions, the stamping angle of the annular protrusions is 80-100 degrees, the stamping height of the annular protrusions is 1.5-2.5 mm, and the width of the annular protrusions is 2.0-2.4 mm.
4. A brazed plate heat exchanger according to claim 1, wherein: the surface of the upper pressing sheet of the fluid distributor is uniformly provided with a plurality of semi-cylindrical convex grooves, the equipartition angle of the semi-cylindrical convex grooves is 30-60 degrees, and the diameter of the semi-cylindrical convex grooves is 3-5 mm; the upper pressing surface of the fluid distributor is provided with an annular concave, the stamping angle of the annular concave is 80-100 degrees, the stamping height of the annular concave is 1.5-2.5 mm, and the width of the annular concave is 2.0-2.4 mm.
5. A brazed plate heat exchanger according to claim 3 or 4, wherein: the lower pressing piece of the fluid distributor and the upper pressing piece of the fluid distributor are of symmetrical structures, and the corresponding sizes are the same in value.
6. A brazed plate heat exchanger according to claim 1, wherein: the fluid distribution tube having a tapered bore; the diameter of the liquid outlet of the fluid distribution pipe is 0.7-1.3 mm, the outer diameter of the fluid distribution pipe is 2.9-4.9 mm, the taper of the conical inner hole of the fluid distribution pipe is 1:12-1:10, and the length of the fluid distribution pipe is 6-7 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810155283.5A CN108195212B (en) | 2018-02-23 | 2018-02-23 | Brazing plate type heat exchanger |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810155283.5A CN108195212B (en) | 2018-02-23 | 2018-02-23 | Brazing plate type heat exchanger |
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| Publication Number | Publication Date |
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| CN108195212A CN108195212A (en) | 2018-06-22 |
| CN108195212B true CN108195212B (en) | 2024-05-14 |
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| CN201810155283.5A Active CN108195212B (en) | 2018-02-23 | 2018-02-23 | Brazing plate type heat exchanger |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU200477U1 (en) * | 2020-08-04 | 2020-10-27 | федеральное государственное бюджетное образовательное учреждение высшего образования «Белгородский государственный технологический университет им. В.Г. Шухова» | HEAT EXCHANGER PLATE |
| US11920876B2 (en) * | 2020-12-10 | 2024-03-05 | Danfoss Micro Channel Heat Exchanger (Jiaxing) Co., Ltd. | Distributor for plate heat exchanger and plate heat exchanger |
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| CN207946002U (en) * | 2018-02-23 | 2018-10-09 | 江苏宝得换热设备股份有限公司 | A kind of brazing plate type heat exchanger |
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| CN103759474B (en) * | 2014-01-28 | 2018-01-02 | 丹佛斯微通道换热器（嘉兴）有限公司 | Plate type heat exchanger |
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| CN108195212A (en) | 2018-06-22 |
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