CN116817640A - Plate heat exchanger - Google Patents

Plate heat exchanger Download PDF

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Publication number
CN116817640A
CN116817640A CN202210456457.8A CN202210456457A CN116817640A CN 116817640 A CN116817640 A CN 116817640A CN 202210456457 A CN202210456457 A CN 202210456457A CN 116817640 A CN116817640 A CN 116817640A
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CN
China
Prior art keywords
heat exchange
plate
wave
plane
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
CN202210456457.8A
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Chinese (zh)
Inventor
请求不公布姓名
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.)
Zhejiang Sanhua Plate Exchange Technology Co ltd
Original Assignee
Zhejiang Sanhua Plate Exchange Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang Sanhua Plate Exchange Technology Co ltd filed Critical Zhejiang Sanhua Plate Exchange Technology Co ltd
Priority to CN202210456457.8A priority Critical patent/CN116817640A/en
Priority to US18/141,356 priority patent/US20230349645A1/en
Priority to EP23170746.4A priority patent/EP4269925A1/en
Publication of CN116817640A publication Critical patent/CN116817640A/en
Pending legal-status Critical Current

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Classifications

    • 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
    • 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
    • F28F3/025—Elements or assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with recesses, with corrugations the means being corrugated, plate-like elements
    • 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
    • F28F3/046—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
    • F28F3/08—Elements constructed for building-up into stacks, e.g. capable of being taken apart for cleaning

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention provides a plate heat exchanger, which comprises a plurality of first heat exchange plates and second heat exchange plates which are alternately stacked; the first heat exchange plate has a first crest and a first trough, and the second heat exchange plate has a second crest and a second trough; at least part of the second wave crests of the second heat exchange plates are connected with the first wave troughs corresponding to the adjacent first heat exchange plates, and at least part of the second wave troughs of the second heat exchange plates are connected with the first wave crests corresponding to the other adjacent first heat exchange plates; the maximum distance between the first wave crest and the first wave trough of the first heat exchange plate is the height h along the height direction of the plate heat exchanger; in the shortest connecting line direction of the peak tops of the adjacent first wave crests, the minimum connecting width of the first wave trough and the second wave crest is W 1 The minimum connecting width of the first wave crest and the second wave trough is W 2 Wherein W is 1 Value sum of/h W 2 Value of/h is twoAt least one of them is 0.25-2.5. The invention designs that the ratio of the peak-valley connection width to the wave height is 0.25-2.5, and ensures the connection strength between adjacent heat exchange plates.

Description

Plate heat exchanger
Technical Field
The invention belongs to the field of heat exchangers, and particularly relates to a plate heat exchanger.
Background
The stainless steel plate type heat exchanger has the advantages of compact structure, high heat exchange coefficient, strong reliability, small refrigerant filling amount and the like, and is widely applied to refrigeration and heating systems as an evaporator, a condenser, an economizer and the like. The plate heat exchanger is composed of overlapped plates with corrugation, after the overlapped plates are formed into two fluid channels, and heat exchange is implemented by means of plate corrugation
The plate heat exchanger is welded after being stacked by heat exchange plates, adjacent heat exchange plates form network-shaped multipoint contact, and an inter-plate channel is formed between the adjacent heat exchange plates for medium fluid to flow for heat exchange, and the connection strength of the contact points directly influences the working stability and the service life of the plate heat exchanger, so that the plate heat exchanger is necessary to provide and ensure the connection strength of the adjacent heat exchange plates.
Disclosure of Invention
In order to solve the problems, the invention provides a plate heat exchanger to ensure the connection strength.
The invention provides a plate heat exchanger, which comprises a plurality of first heat exchange plates and second heat exchange plates which are alternately stacked, wherein the stacking direction of the first heat exchange plates and the second heat exchange plates is the same as the height direction of the plate heat exchanger;
the first heat exchange plate has a first corrugation comprising first peaks and first valleys, and the second heat exchange plate has a second corrugation comprising second peaks and second valleys; at least part of the second wave crests of the second heat exchange plates are connected with the first wave troughs corresponding to the adjacent first heat exchange plates, and at least part of the second wave troughs of the second heat exchange plates are connected with the first wave crests corresponding to the other adjacent first heat exchange plates;
the maximum distance between the first wave crest and the first wave trough of the first heat exchange plate is the height h along the height direction of the plate heat exchanger;
in the shortest connecting line direction of the peak tops of the adjacent first wave crests, the minimum connecting width of the first wave trough and the second wave crest is W 1 The minimum connecting width of the first wave crest and the second wave trough is W 2 Wherein W is 1 Value sum of/h W 2 At least one of the values of/h is 0.25 to 2.5.
The plate heat exchanger provided by the invention has the advantages that the ratio of the width between the peaks and the bottoms of the heat exchange plates to the height of the corrugation is 0.25-2.5, so that the connection strength between adjacent heat exchange plates of the plate heat exchanger is ensured.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the description of the embodiments will be briefly described below, it will be apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort to a person of ordinary skill in the art.
Fig. 1 is a schematic structural diagram of a plate heat exchanger according to an embodiment of the present invention;
FIG. 2 is an exploded view of a plate heat exchanger according to an embodiment of the present invention;
FIG. 3a is a partial cross-sectional view of adjacent first and second heat exchanger plates of the first embodiment;
FIG. 3b is another partial cross-sectional view of adjacent first and second heat exchanger plates in accordance with the first embodiment;
FIG. 3c is a schematic view of a portion of an embodiment of a first heat exchanger plate and a second heat exchanger plate adjacent to each other;
FIG. 3d is a schematic view of a front view of a middle plate heat exchanger according to an embodiment of the present invention;
FIG. 4a is an enlarged schematic view of portion A of FIG. 2;
FIG. 4B is an enlarged schematic view of portion B of FIG. 2;
fig. 5 is a cross-sectional view of a plate heat exchanger according to a second embodiment of the present invention;
FIG. 6 is a partial cross-sectional view of adjacent first and second heat exchanger plates in accordance with a second embodiment of the invention;
FIG. 7 is an enlarged schematic view of portion C of FIG. 5;
FIG. 8 is a schematic diagram showing the arrangement of the second peaks and the ridges according to the first embodiment of the second embodiment of the present invention;
FIG. 9 is a schematic diagram showing the arrangement of the second peaks and the ridges according to the second embodiment of the present invention;
FIG. 10 is a schematic diagram showing the arrangement of the second peaks and the ridges according to the third embodiment of the second embodiment of the present invention;
FIG. 11 is a partially exploded view of adjacent first and second heat exchanger plates in accordance with a second embodiment of the present invention;
fig. 12 is a schematic front view of a first heat exchanger plate in accordance with a third embodiment of the present invention;
fig. 13 is a schematic front view of a second heat exchanger plate in accordance with a third embodiment of the present invention;
FIG. 14 is a schematic view of a portion of a third embodiment of the present invention in which first and second corrugations form a web-like contact;
fig. 15 is a schematic view of a portion of a first flow guiding portion according to a second embodiment of the third embodiment of the present invention;
fig. 16 is a schematic view of a portion of a second flow guiding portion according to a second embodiment of the third embodiment of the present invention;
FIG. 17 is a schematic view of a portion of a first flow guiding portion according to a third embodiment of the present invention;
FIG. 18 is a schematic view of a portion of a second flow guiding portion according to a third embodiment of the present invention;
fig. 19 is a schematic view of a stacked structure of adjacent first and second heat exchanger plates in an embodiment of the present invention;
FIG. 20 is a schematic view of a structure of a first port and a second port with a gap in an embodiment of the invention;
fig. 21 is an enlarged schematic view of a portion D in fig. 5.
Detailed Description
For a better understanding of the technical solution of the present invention, the following detailed description of the embodiments of the present invention refers to the accompanying drawings.
It should be understood that the described embodiments are merely some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1
As shown in fig. 1, 2, 3a, 3b and 7, the plate heat exchanger provided in this embodiment includes a plurality of first heat exchange plates 10 and second heat exchange plates 20 stacked alternately, the stacking direction of the first heat exchange plates 10 and the second heat exchange plates 20 is the same as the height direction of the plate heat exchanger, and the stacked heat exchange plates are integrated by welding (e.g., brazing). The first heat exchanger plate 10 has a first corrugation 1 and the second heat exchanger plate 20 has a second corrugation 2, the first corrugation 1 comprising first corrugation peaks 1r and first corrugation troughs 1g and the second corrugation 2 comprising second corrugation peaks 2r and second corrugation troughs 2g. At least part of the second wave crests 2r of a second heat exchanger plate 20 meet first wave troughs 1g corresponding to adjacent first heat exchanger plates 10, and at least part of the second wave troughs 2g of a second heat exchanger plate 20 meet first wave crests 1r corresponding to another adjacent first heat exchanger plates 10.
The maximum distance between the first peaks 1r and the first valleys 1g of the first heat exchanger plate 10 in the height direction of the plate heat exchanger is the height h.
Specifically, at least part of the peak top surface of the first peak 1r of the first heat exchange plate 10 is located in the first plane P1, at least part of the valley bottom surface of the first valley 1g is located in the second plane P2, the first plane P1 is parallel to the second plane P2, and the distance (i.e., vertical distance) from the first plane P1 to the second plane P2 is the same as the height h; at least part of the peak top surfaces of the second peaks 2r of the second heat exchanger plate 20 are located in a third plane P3, at least part of the valley bottom surfaces of the second valleys 2g are located in a fourth plane P4, the third plane P3 is parallel to the fourth plane P4, and the distance (i.e. vertical distance) from the third plane P3 to the fourth plane P4 is the same as the height h; the third plane P3 of a second heat exchanger plate 20 coincides with the second plane P2 of an adjacent first heat exchanger plate 10 and the fourth plane P4 of a second heat exchanger plate 20 coincides with the first plane P1 of another adjacent first heat exchanger plate 10. In this embodiment, the peak top surfaces of the first peaks 1r of the optional first heat exchange plates 10 are all located in the first plane P1, the valley bottom surfaces of the first valleys 1g are all located in the second plane P2, the peak top surfaces of the second peaks 2r of the second heat exchange plates 20 are all located in the third plane P3, and the valley bottom surfaces of the second valleys 2g are all located in the fourth plane P4.
In the present embodiment, the stacking direction of the first heat exchanger plate 10 and the second heat exchanger plate 20 (X direction as shown in fig. 1) is perpendicular to the first plane P1, i.e. the height direction of the plate heat exchanger is perpendicular to the first plane P1.. In this embodiment, the stacking sequence of the first heat exchange plate 10 and the second heat exchange plate 20 is not particularly limited, and the first heat exchange plate 10, the second heat exchange plate 20, the first heat exchange plate 10 may be stacked in sequence, or the second heat exchange plate 20, the first heat exchange plate 10, and the second heat exchange plate 20 may be stacked in sequence.
The plate heat exchanger is connected through corresponding wave crests and wave troughs to form network-shaped multipoint contact, in the heat exchange process of the plate heat exchanger, media flow back between the contact points, the waves of the plates enable the media to form turbulence at a lower Reynolds number so as to achieve better heat exchange performance, and if the connection fastness between adjacent heat exchange plates is low, the problems of poor working stability and even failure occur. In order to ensure the connection strength between adjacent heat exchange plates to improve the stability of the plate heat exchanger, the design of the wave crest and the wave trough which are connected is carried out in the embodiment: referring again to fig. 3a, 3b and 3d, in the shortest connecting line direction between the peaks of the adjacent first peaks 1r (Y direction shown in fig. 3 d), i.e. the connecting line direction between the peaks of the first peaks 1r perpendicularly connecting the first heat exchange plates 10, the minimum connecting width of the connected first trough 1g and second peak 2r is W 1 The minimum connecting width of the first wave crest 1r and the second wave trough 2g is W 2 Wherein W is 1 Value sum of/h W 2 At least one of the values of/h is 0.25 to 2.5. By W 1 /h and/or W 2 The value of/h is designed in the range of 0.25-2.5, so that the problems of insufficient soldering and incomplete soldering caused by too little contact between the peak top and the valley bottom are avoided, and the heat exchange performance of the heat exchanger is prevented from being influenced by too much space between the heat exchange plates occupied by solder caused by too large contact.
In order to ensure the connection width, the outer width of the bottom of the first trough 1g connected with the second crest 2r is more than or equal to W in the shortest connection line direction of the tops of the adjacent first crest 1r 1 The outer width of the peak top of the second wave crest 2r connected with the first wave trough 1g is more than or equal to W 1 The outer width of the peak top of the first peak 1r connected with the second trough 2g is more than or equal to W 2 The width of the second wave trough 2g connected with the first wave crest 1r is more than or equal to W 2 . In this embodiment, the shortest connecting line direction between the peaks of the adjacent first peaks 1r is selectedThe width of the first trough 1g connected with the second crest 2r is W 1 The outer width of the peak top of the second wave crest 2r connected with the first wave trough 1g is W 1 The outer width of the peak top of the first peak 1r connected with the second trough 2g is W 2 The width of the second wave trough 2g connected with the first wave crest 1r is W 2 。
In this embodiment, the maximum distance between the second peaks 2r and the second valleys 2g on the second heat exchanger plate 20 in the height direction of the plate heat exchanger is also the height h. It should be understood that, due to the influence of machining precision, assembly precision, measurement errors, etc., the distance from the first plane P1 to the second plane P2 is not absolutely equal to the height h, allowing for a certain error, the error range is ± 0.1h, and similarly, the overlapping planes also allow for a tolerance of ± 0.1 h. In the present embodiment, W 1 Equal to W 2 W here 1 Equal to W 2 Not absolutely equal, both allow for an error of + -0.3 mm, therefore W 1 Value of/h and W 2 The value of/h is also approximately the same, in this example h is 1 to 2mm. Of course, W 1 And W is equal to 2 The values of (a) may also be different (not shown), then W 1 Value of/h and W 2 The value of/h is different, and W can be selected according to actual requirements 1 Greater than W 2 Or W 1 Less than W 2 Or W 1 And W is equal to 2 The same applies.
Specifically, referring again to fig. 3a, 3b in combination with fig. 5, the plate-to-plate channels of the plate heat exchanger comprise at least one first channel 6 and at least one second channel 7, the first channel 6 being located between a second heat exchanger plate 20 and an adjacent first heat exchanger plate 10, the second channel 7 being located between the second heat exchanger plate 20 and another adjacent first heat exchanger plate 10, the first channels 6 being in communication with each other, the second channels 7 being in communication with each other, the first channels 6 being in non-communication with the second channels 7. In this embodiment, the corrugations of the first heat exchanger plate 10 and the second heat exchanger plate 20 are symmetrically distributed, so that the volumes of the first channel 6 and the second channel 7 are substantially the same (as shown in fig. 3 a), or the first channel 6 and the second channel 7 have a larger volume difference (as shown in fig. 3 b).
In this embodiment, the wavelengths λ of the first wave crest 1r, the first wave trough 1g, the second wave crest 2r, and the second wave trough 2g are substantially the same, that is, the pitches of the adjacent first wave crest 1r, the pitches of the adjacent first wave trough 1g, the pitches of the adjacent second wave crest 2r, and the pitches of the adjacent second wave trough 2g are the same. Of course, the wavelength λ of the first wave trough 1g and the second wave trough 2r and the wavelength λ of the first wave trough 1r and the second wave trough 2g may also be different.
In order to further improve the connection strength between adjacent heat exchange plates after welding, referring to fig. 3c, in this embodiment, the peak top of the first wave crest 1r, the peak top of the second wave crest 2r, the valley bottom of the first wave trough 1g and the valley bottom of the second wave trough 2g are all flat parts 3a, the surfaces of the flat parts 3a for connection are perpendicular to the stacking direction, in other words, the peak tops of the first wave crest 1r and the second wave crest 2r are flat parts 3a, the valley bottoms of the first wave trough 1g and the second wave trough 2g are flat parts 3a, and during welding, solder can fully contact with the surfaces of the peak tops and the valley bottoms and is filled between the corresponding flat parts 3a, so that the contact area is increased, the problem of cold welding is reduced, and the welding strength is further improved.
In addition, in the present embodiment, the first crest 1r, the second crest 2r, the first trough 1g, and the second trough 2g further include a first side wall portion 3b and a second side wall portion 3c, and in the shortest line direction of the crest tops of the adjacent first crest 1r, one side of the straight portion 3a is connected to the first side wall portion 3b, the other side is connected to the second side wall portion 3c, and an included angle α is formed between the first side wall portion 3b and the second side wall portion 3c, and 120 ° α is equal to or less than 135 °. In the present embodiment, the first side wall portion 3b and the second side wall portion 3c are symmetrical with respect to the straight portion 3 a.
< example two >
In this embodiment, the same reference numerals are given to the same parts as those of the first embodiment, and the same description is omitted.
Compared with the first embodiment, the plate heat exchanger provided by the embodiment has the following distinguishing design:
referring to fig. 4a, 4b, and 5 to 7, in order to improve the heat exchange effect of the plate heat exchanger and prevent the heat exchange performance from being reduced due to excessive pressure loss in the heat transfer process, the second corrugation 2 is improved, and the first corrugation 1 is the same as the first embodiment. Specifically, the second corrugation 2 further includes at least one ridge 2a, and the ridge 2a is distributed along the shortest line direction between the peaks of the adjacent second peaks 2r of the second heat exchanger plate 20. Along the stacking direction (i.e. in the height direction of the plate heat exchanger), the top of the ridge 2a is located between the peak top of the second crest 2r and the valley bottom of the second trough 2g, along the stacking direction, two sides of the same ridge 2a are respectively provided with a first channel 6 and a second channel 7, and the volumes of the first channel 6 and the second channel 7 are different. In this embodiment, the second heat exchanger plate 20 is provided with the ridge 2a so that the plate heat exchanger has different volumes of plate-to-plate passages (in the stacking direction) on both sides of the ridge 2 a. Of course, the present embodiment may also adopt a design in which the ridge 2a is provided on the first corrugation 1 so that the channel volume is different between the plates, which will not be described in detail here.
According to the embodiment, only part of the corrugation of one heat exchange plate of the adjacent heat exchange plates is changed, so that the corrugation height of the part is different from the whole corrugation height of the heat exchange plate, namely, one side of the inter-plate channel is a symmetrical heat exchange plate, the other side of the inter-plate channel is an asymmetrical heat exchange plate, so that the volumes of the adjacent first channel 6 and the adjacent second channel 7 are different, the pressure loss is small, the heat exchange efficiency of the plate heat exchanger is improved, but the heat exchange performance is not influenced due to overlarge volume difference between the adjacent first channel 6 and the adjacent second channel, the medium flows in the first channel 6 and the second channel 7 in the heat exchange working process of the plate heat exchanger, the flow pressure drop of the medium in the inter-plate channel with smaller volume is increased, the turbulence of the medium fluid is increased, the heat transfer effect of the medium in the heat exchanger is improved, the heat exchange performance is improved, and the flow pressure drop of the medium is obviously reduced, the turbulence of the medium is slowed down due to the increase of the volume of the inter-plate channel on the other side, and the pressure drop of the medium can be used for flowing high-pressure medium to reduce the pressure drop and improve the heat exchange performance. In this embodiment, the variation of the partial corrugation is performed by varying the volume of the channels between the plates as compared to forming a plurality of grooves in the corrugation.
Due to the arrangement of the convex ridges 2a, the contact points of network-shaped multipoint contact between the heat exchange plates are reduced, and in order to ensure the connection strength between the heat exchange plates and ensure the welding strength of the peaks and the troughs of the contact, W 1 Value sum of/h W 2 At least one of the values of/h is 0.3 to 1, such as 0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.60.65, 0.7, 0.75, 0.8, 0.85, 0.9, 1 and the like, the heat exchange performance and the heat exchange efficiency of the heat exchanger are improved, and meanwhile, higher welding strength is ensured, and the working stability of the plate heat exchanger is improved. Alternative W of this embodiment 1 Value sum of/h W 2 Values of/h 0.3 to 1.
Referring to fig. 7 again, in the present embodiment, the wavelength λ of the ridge 2a (i.e. the distance between two adjacent valleys of the ridge 2 a) is substantially the same as the wavelength λ of the first peak 1r, the first valley 1g, the second peak 2r, and the second valley 2g. The top of the ridge 2a of the same second heat exchanger plate 20 is located substantially in a fifth plane P5, the fifth plane P5 being located between the third plane P3 and the fourth plane P4 of the same second heat exchanger plate 20. The fifth plane P5 is substantially parallel to the third plane P3, and the height d of the ridge 2a is the distance d= (0.4-0.75) h from the fifth plane P5 to the fourth plane P4 of the same second heat exchange plate 20, so as to define the height d of the ridge 2a, and prevent the height d from being too low or too high to affect the heat exchange performance of the heat exchanger.
Since the ridge 2a is provided, the first side wall portion 3b and the second side wall portion 3c of the second trough 2g adjacent to the ridge 2a are asymmetric with respect to the straight portion 3a, as shown in fig. 11.
In this embodiment, at least one ridge 2a is disposed on each second wave crest 2r of the second wave crest 2 at least, the ridge 2a is distributed along the shortest line direction of the peak tops of the adjacent second wave crests 2r on the second heat exchange plate 20, that is, at least one ridge 2a is disposed between the adjacent second wave crests 2r, and at least one second wave crest 2r is disposed between the adjacent ridge 2 a. For ease of understanding, the following is illustrated by the various embodiments:
in the first embodiment, as shown in fig. 8, each second crest 2r of the second corrugation 2 is provided with a ridge 2a, that is, the second crests 2 r-ridges 2a are sequentially arranged, and a second trough 2g is formed between the adjacent second crest 2r and the ridge 2 a.
In the second embodiment, as shown in fig. 9, two ridges 2a are disposed at each second crest 2r of the second corrugation 2, that is, the second crests 2r, the ridges 2a, and the ridges 2a are sequentially arranged, and the adjacent second crests 2r, the ridges 2a, and the adjacent ridges 2a are each provided with a second trough 2g.
In the third embodiment, as shown in fig. 10, one ridge 2a is disposed on every two second peaks 2r of the second corrugation 2, that is, the second peaks 2 r-ridge 2a are sequentially arranged, and second wave troughs 2g are disposed between adjacent second peaks 2r and the ridge 2a, and between adjacent second peaks 2r.
The arrangement of the ridges 2a on the second corrugation 2 is only exemplified, but not limited thereto, and the arrangement of the second corrugation peaks 2 r-ridges 2a, etc. may be adopted, and the arrangement may be selected according to the heat exchange requirement.
Of course, in this embodiment, the tops of the ridges 2a of the same second heat exchanger plate 20 may not be in the same plane, i.e. the ridges 2a have different heights d.
Example III
In this embodiment, the same reference numerals are given to the same parts as those of the first and second embodiments, and the same description is omitted.
Compared with the first embodiment and the second embodiment, the plate heat exchanger provided by the embodiment has the following design:
referring to fig. 12 to 14, the first heat exchange plate 10 and the second heat exchange plate 20 are rectangular and include two short sides 3d and two long sides 3e, the first corrugation 1 includes a first guiding portion 4, the second corrugation 2 includes a second guiding portion 5, and an opening angle β1 of the first guiding portion 4 is the same as an opening angle β2 of the second guiding portion 5; the direction of the opening angle beta 1 of the first flow guiding part 4 is opposite to the direction of the opening angle beta 2 of the second flow guiding part 5. By the reverse combination of the first corrugation of the first heat exchange plate 10 and the second corrugation of the second heat exchange plate 20, a network-like multipoint contact is formed, and under the action of the corrugation, fluid medium forms turbulence in the channels between the plates at a lower Reynolds number, thereby improving the heat transfer effect and helping to reduce the scale formation of the heat exchange plates.
In order to improve the heat exchange performance, the first flow guiding portion 4 and the second flow guiding portion 5 in this embodiment may be in V-shaped distribution, W-shaped distribution, and the like, and will be specifically described in the following by different embodiments.
In the first embodiment, referring to fig. 12 and 13 again, the first flow guiding portion 4 includes a first flow guiding portion 4a and a second flow guiding portion 4b, and the first flow guiding portion 4a and the second flow guiding portion 4b are connected to form a V-shape and form an opening angle β1; the first and second flow guiding portions 4a, 4b are symmetrical about a centre line l, which is perpendicular to the two short sides 3d. Correspondingly, the second corrugation 2 comprises a second guiding portion 5, the second guiding portion 5 comprises a third guiding portion 5a and a fourth guiding portion 5b, and the third guiding portion 5a and the fourth guiding portion 5b are connected with each other and form an opening angle beta 2.
In the second embodiment, referring to fig. 15 and 16, the first flow guiding portion 4 includes two first flow guiding portions 4a and a second flow guiding portion 4b, the first flow guiding portions 4a and the second flow guiding portions 4b are alternately distributed along the short side direction of the heat exchange plate, and adjacent first flow guiding portions 4a and second flow guiding portions 4b are connected to each other and form an opening angle β1; the first and second flow guiding portions 4a, 4b are symmetrical about a centre line l' which is perpendicular to the two short sides. Correspondingly, the second corrugation 2 comprises a second flow guiding portion 5, the second flow guiding portion 5 comprises two third flow guiding sub-portions 5a and a fourth flow guiding sub-portion 5b, the third flow guiding sub-portions 5a and the fourth flow guiding sub-portions 5b are alternately distributed along the short side direction of the heat exchange plate, and adjacent third flow guiding sub-portions 5a and fourth flow guiding sub-portions 5b are connected and form an opening angle beta 2.
In the third embodiment, referring to fig. 17 and 18, in the second embodiment, a second flow guiding portion 4b is added to the first flow guiding portion 4, and a fourth flow guiding portion 5b is added to the second flow guiding portion 5, so that the first flow guiding portion 4 is W-shaped and the second flow guiding portion 5 is reverse W-shaped.
The above only exemplifies the distribution mode of part of the flow guiding parts, but the flow guiding parts are not limited to the above, and can be in 3-weight V-shaped or even more-weight V-shaped distribution, and the opening angles on the same heat exchange plate can be the same or different.
Further, the corrugated opening angle is selected to be large, 90 degrees is less than or equal to beta 1 (beta 2) is less than or equal to 135 degrees, and the heat transfer coefficient is improved to obtain more heat exchange quantity.
The partial technical implementations of the first to third embodiments described above may be combined or replaced.
Referring to fig. 12 and 13 again in combination with fig. 19, in the above embodiment, the first heat exchange plate 10 is provided with four first through holes 8a, wherein two first through holes 8a are in the same plane with the bottom of the first trough 1g of the first heat exchange plate 10, and the other two first through holes 8a are in the same plane with the top of the first crest 1r of the first heat exchange plate 10; the four first through openings 8a are respectively positioned at the four corners of the first heat exchange plate 10; the second heat exchange plate 20 is provided with four second ports 8b, wherein two second ports 8b are in the same plane with the top of the second wave crest 2r of the same second heat exchange plate 20, and the other two second ports 8b are in the same plane with the bottom of the second wave trough 2g of the same second heat exchange plate 20; four second ports 8b are located at the four corners of the second heat exchanger plate 20, respectively; the second through holes 8b of the second heat exchange plate 20 correspond to the first through holes 8a of the adjacent first heat exchange plates 10 in position, and two pairs of corresponding first through holes 8a and second through holes 8b are attached in the adjacent first heat exchange plates 10 and second heat exchange plates 20, and gaps are formed between the other two pairs of corresponding first through holes 8a and second through holes 8b at intervals to communicate corresponding plate-to-plate channels. Further, the two pairs of first and second openings 8a and 8b that are bonded to each other are diagonally arranged, in other words, the first and second openings 8a and 8b having a gap are diagonally arranged. When the plate heat exchanger is configured for use in a heat exchange process, a medium flows into the corresponding plate-to-plate passages between a pair of first and second through-holes 8a, 8b having a gap, and flows out from between the diagonally opposite first and second through-holes 8a, 8b having a gap. Of course, in the above embodiment, the first port 8a and the second port 8b having the gap may be distributed on the same side and close to the long side.
Further, in order to enhance the structural strength of the corners of the first and second openings 8a and 8b having the gaps, the first heat exchanger plate 10 is provided with the first support portion 8c at the corner of the first opening 8a and the second support portion 8d at the corner of the second opening 8b, and the first support portion 8c and the second support portion 8d are each protruded in the gap direction and abutted against each other, and the peripheries of the first and second openings 8a and 8b having the gaps are effectively supported by providing the first and second support portions 8c and 8d, thereby enhancing the structural strength. Wherein the first support portion 8c and the second support portion 8d are pressed protrusions or grooves.
Still further, referring to fig. 21, in the above embodiment, the outer periphery of the first heat exchange plate 10 has a first skirt 9a, the outer periphery of the second heat exchange plate 20 has a second skirt 9b, and the first skirt 9a of the first heat exchange plate 10 is at least partially overlapped with the second skirt 9b of the adjacent second heat exchange plate 20 and surrounds the corresponding plate-to-plate channel. In addition, referring to fig. 1 and 2 again, in the above embodiment, the plate heat exchanger further includes a connecting pipe 9c and a blocking member 9d, the first port 8a or the second port 8b on one side of the plate heat exchanger along the stacking direction is respectively connected to the connecting pipe 9c, the first port 8a or the second port 8b on the other side is respectively provided with the blocking member 9d, that is, each port of the first heat exchange plate of the plate heat exchanger is respectively connected to the connecting pipe 9c, each port of the last heat exchange plate is respectively provided with a blocking member 9d for blocking, the blocking member 9d may be a gasket, and of course, the last Zhang Huanre plate may also not be provided with a port.
The technical principles of the present invention have been described above in connection with specific embodiments, but it should be noted that the above descriptions are only for explaining the principles of the present invention and should not be construed as limiting the scope of the present invention in any way. Other embodiments of the invention, or equivalents thereof, will suggest themselves to those skilled in the art without undue burden from the present disclosure, based on the explanations herein.

Claims (10)

1. A plate heat exchanger, characterized in that: the heat exchanger comprises a plurality of first heat exchange plates and second heat exchange plates which are alternately stacked, wherein the stacking direction of the first heat exchange plates and the second heat exchange plates is the same as the height direction of the plate heat exchanger;
the first heat exchange plate has a first corrugation comprising first peaks and first valleys, and the second heat exchange plate has a second corrugation comprising second peaks and second valleys; at least part of the second wave crests of the second heat exchange plates are connected with the first wave troughs corresponding to the adjacent first heat exchange plates, and at least part of the second wave troughs of the second heat exchange plates are connected with the first wave crests corresponding to the other adjacent first heat exchange plates;
the maximum distance between the first wave crest and the first wave trough of the first heat exchange plate is the height h along the height direction of the plate heat exchanger;
in the shortest connecting line direction of the peak tops of the adjacent first wave crests, the minimum connecting width of the first wave trough and the second wave crest is W 1 The minimum connecting width of the first wave crest and the second wave trough is W 2 Wherein W is 1 Value sum of/h W 2 At least one of the values of/h is 0.25 to 2.5.
2. A plate heat exchanger according to claim 1, wherein: the maximum distance between the second wave crest and the second wave trough of the second heat exchange plate is the height h along the height direction of the plate heat exchanger;
the outer width of the bottom of the first trough connected with the second crest is more than or equal to W in the shortest connecting line direction of the tops of the adjacent first crests 1 The outer width of the peak top of the second wave crest connected with the first wave trough is more than or equal to W 1 The outer width of the peak top of the first peak connected with the second trough is more than or equal to W 2 The outer width of the bottom of the second trough connected with the first crest is more than or equal to W 2 ；
The W is 1 Value sum of/h W 2 At least one of the values of/h is 0.3 to 1.
3. A plate heat exchanger according to claim 2, wherein: the outer width of the bottom of the first trough connected with the second crest is W in the shortest connecting line direction of the tops of the adjacent first crests 1 The outer width of the peak top of the second wave crest connected with the first wave trough is W 1 The outer width of the peak top of the first peak connected with the second trough is W 2 The outer width of the bottom of the second trough connected with the first crest is W 2 ；
The W is 1 And W is equal to 2 The same applies.
4. A plate heat exchanger according to claim 1, wherein: the peak top surface of at least part of the first wave crest of the first heat exchange plate is positioned in a first plane P1, the valley bottom surface of at least part of the first wave trough is positioned in a second plane P2, the first plane P1 is parallel to the second plane P2, and the distance from the first plane P1 to the second plane P2 is the same as the height h;
the peak top surface of at least part of the second wave crest of the second heat exchange plate is positioned in a third plane P3, the valley bottom surface of at least part of the second wave trough is positioned in a fourth plane P4, the third plane P3 is parallel to the fourth plane P4, and the distance from the third plane P3 to the fourth plane P4 is the same as the height h;
the third plane P3 of the second heat exchange plate coincides with the second plane P2 of the adjacent first heat exchange plate, and the fourth plane P4 of the second heat exchange plate coincides with the first plane P1 of the other adjacent first heat exchange plate;
the plate heat exchanger has a height direction perpendicular to the first plane P1.
5. A plate heat exchanger according to any one of claims 1-4, wherein: the peak top of the first wave crest, the peak top of the second wave crest, the valley bottom of the first wave trough and the valley bottom of the second wave trough are all straight parts, and the surfaces of the straight parts, which are used for connection, are perpendicular to the height direction of the plate heat exchanger;
the first wave crest, the second wave crest, the first wave trough and the second wave trough further comprise a first side wall part and a second side wall part, one side of the straight part is connected with the first side wall part, the other side of the straight part is connected with the second side wall part in the shortest connecting line direction of the peak tops of the adjacent first wave crests, and an included angle alpha is formed between the first side wall part and the second side wall part and is more than or equal to 120 degrees and less than or equal to 135 degrees.
6. A plate heat exchanger according to any one of claims 1-4, wherein: the second corrugation also comprises at least one ridge, and the ridge is distributed along the shortest connecting line direction of the peaks of the adjacent second wave crests of the second heat exchange plate;
the tops of the ridges are positioned between the tops of the second wave crests and the bottoms of the second wave troughs along the height direction of the plate heat exchanger; the plate heat exchangers have different plate channel volumes at two sides of the ridge along the height direction of the plate heat exchangers;
the top of the ridge of the second heat exchanger plate is located in a fifth plane P5, the fifth plane P5 being located between a third plane P3 and a fourth plane P4 of the same second heat exchanger plate;
the fifth plane P5 is parallel to the third plane P3, the height d of the ridge is the distance from the fifth plane P5 to the fourth plane P4, and d= (0.4-0.75) h;
the h is 1-2 mm.
7. A plate heat exchanger according to claim 6, wherein: at least one convex ridge is arranged between every two adjacent second wave crests, and at least one second wave crest is arranged between every two adjacent convex ridges;
the plate-to-plate channel of the plate heat exchanger comprises at least one first channel and at least one second channel, wherein the first channel is positioned between a second heat exchange plate and an adjacent first heat exchange plate, the second channel is positioned between the second heat exchange plate and another adjacent first heat exchange plate, the same ridge is respectively provided with the first channel and the second channel at two sides along the height direction of the plate heat exchanger, and the volumes of the first channel and the second channel are different;
the first channels are communicated, the second channels are communicated, and the first channels and the second channels are not communicated.
8. A plate heat exchanger according to any one of claims 1-4, wherein: the first heat exchange plate and the second heat exchange plate both comprise two short sides and two long sides, the first corrugation comprises a first diversion part, the first diversion part comprises at least one first diversion part and at least one second diversion part, the adjacent first diversion part and second diversion part are connected, and an opening angle beta 1 is more than or equal to 90 degrees and less than or equal to 135 degrees;
the first flow guiding part and the second flow guiding part are symmetrical about a central line l, and the central line l is perpendicular to the two short sides;
the second corrugation comprises a second diversion part, the second diversion part comprises at least one third diversion subsection and at least one fourth diversion subsection, the adjacent third diversion subsection and fourth diversion subsection are connected, and an opening angle beta 2 is more than or equal to 90 degrees and less than or equal to 135 degrees;
the opening angle beta 1 of the first flow guiding part is the same as the opening angle beta 2 of the second flow guiding part; the direction of the opening angle beta 1 of the first flow guiding part is opposite to the direction of the opening angle beta 2 of the second flow guiding part.
9. A plate heat exchanger according to any one of claims 1-4, wherein: the first heat exchange plate is provided with four first through holes, wherein two first through holes are in the same plane with the bottoms of the first wave troughs of the same first heat exchange plate, and the other two first through holes are in the same plane with the tops of the first wave crests of the same first heat exchange plate;
the four first through holes are respectively positioned at four corners of the first heat exchange plate;
the second heat exchange plate is provided with four second ports, wherein two second ports are in the same plane with the top of a second crest of the same second heat exchange plate, and the other two second ports are in the same plane with the bottom of a second trough of the same second heat exchange plate;
the four second ports are respectively positioned at four corners of the second heat exchange plate;
the second port of the second heat exchange plate corresponds to the first port of the adjacent first heat exchange plate;
two pairs of adjacent first heat exchange plates and second heat exchange plates are attached to each other in the corresponding first through holes and second through holes, and gaps are formed between the other two pairs of adjacent first heat exchange plates and second heat exchange plates at intervals;
the two pairs of first through holes and the second through holes which are attached to each other are distributed diagonally.
10. A plate heat exchanger according to claim 9, wherein: the heat exchange device comprises a first heat exchange plate, a second heat exchange plate, a first support part, a second support part, a first heat exchange plate and a second heat exchange plate, wherein the first port and the second port are arranged at intervals, the first support part and the second support part are provided at the corner where the first port is positioned, and the first support part and the second support part are both protruded towards the gap direction and are abutted;
the periphery of the first heat exchange plate is provided with a first skirt edge, the periphery of the second heat exchange plate is provided with a second skirt edge, and the first skirt edge of the first heat exchange plate and the second skirt edge of the adjacent second heat exchange plate are at least partially overlapped to surround corresponding plate-to-plate channels;
the plate heat exchanger further comprises a connecting pipe and a plugging piece, the first port or the second port of one side of the plate heat exchanger along the height direction of the plate heat exchanger is respectively connected with the connecting pipe, and the first port or the second port of the other side is respectively provided with the plugging piece.
CN202210456457.8A 2022-04-28 2022-04-28 Plate heat exchanger Pending CN116817640A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN202210456457.8A CN116817640A (en) 2022-04-28 2022-04-28 Plate heat exchanger
US18/141,356 US20230349645A1 (en) 2022-04-28 2023-04-28 Plate heat exchanger with improved connection strength of adjacent heat exchange plates
EP23170746.4A EP4269925A1 (en) 2022-04-28 2023-04-28 Plate heat exchanger

Applications Claiming Priority (1)

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CN202210456457.8A CN116817640A (en) 2022-04-28 2022-04-28 Plate heat exchanger

Publications (1)

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SE534918C2 (en) * 2010-06-24 2012-02-14 Alfa Laval Corp Ab Heat exchanger plate and plate heat exchanger
KR20210026216A (en) * 2019-08-29 2021-03-10 엘지전자 주식회사 Plate type heat exchanger
EP3828489A1 (en) * 2019-11-26 2021-06-02 Alfa Laval Corporate AB Heat transfer plate
SE545690C2 (en) * 2020-01-30 2023-12-05 Swep Int Ab A brazed plate heat exchanger and use thereof

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