• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    ABSTRACT A method for brazing a plate heat exchanger comprising a stack of heatexchanger plates (110,115) is provided with a pressed pattern of ridges (R) and grooves(G) adapted to form contact points between the plates (110, 115) and provide forinterplate flow channels for media to exchange heat is provided. The interplate flowchannels are in selective fluid communications with port openings (120, 130, 140, 150)provided near corners of the heat exchanger plates (110, 115). The method comprisesthe following steps: calculating or measuring the exact position of all contact points between theridges (R) and grooves (G) of the neighboring plates (110, 115); applying brazing material (B) close to, but not at, the contact points; stacking heat exchanger plates (110, 115) provided with brazing material to astack ; placing the stack of heat exchanger plates (110, 115) in a fumace; heating the stack of heat exchanger plates (110, 115) to a temperature sufficientfor melting the brazing material (B); and allowing the stack of heat exchanger plates (110, 115) to cool down such thatthe brazing material (B) solidif1es and binds the plates (110, 115) together. To be published with Fig. 2
    公开号:SE539695C2
    申请号:SE1451294
    申请日:2014-10-29
    公开日:2017-10-31
    发明作者:Bornegård Niclas
    申请人:Swep Int Ab；
    IPC主号:
    专利说明:

    The present invention relates to a method for brazing a plate heat exchangercomprising a stack of heat exchanger plates provided with a pressed pattern of ridgesand grooves adapted to forrn contact points between the plates and provide for interplateflow channels for media to exchange heat, said interplate flow channels being inselective fluid communications with port openings provided near comers of the heatexchanger plates, the method including the steps of: i. calculating or measuring the exact position of all contact points between theridges and grooves of the neighboring plates; ii. applying brazing material close to, but not at, the contact points; stacking heat exchanger plates provided with brazing material to a stack ; iii. placing the stack of heat exchanger plates in a fumace; iv. heating the stack of heat exchanger plates to a temperature suff1cient formelting the brazing material (B); and v. allowing the stack of heat exchanger plates to cool down such that thebrazing material solidif1es and binds the plates together.
    The invention also relates to a brazed heat exchanger comprising a number ofheat exchanger plates provided with a pressed pattem of ridges and grooves forproviding contact points between the heat exchanger plates while keeping the plates ona distance from one another under formation of interplate flow channels for media toexchange heat, wherein port openings are provided for selective fluid communication with the interplate flow channels.
    PRIOR ART It has been known for a long time to braze plate heat exchangers. Usually, abrazing material is placed between plates of a stack of heat exchanger plates providedwith a pressed pattem of ridges and grooves holding the plates on a distance from oneanother under formation of interplate flow channels to exchange heat. The stack ofplates is then placed in a fumace which is heated to a temperature above the meltingtemperature of the brazing material. The brazing material is due to capillary forcesconcentrated to the contact points between the ridges and grooves of the neighboring plates.
    After the heating in the fumace, the temperature is lowered, such that thebrazing material solidif1es, hence fastening the plates to one another.
    The heat exchanger plates are often made from stainless steel, and the brazingmaterial may be any metal or alloy having a melting point below the melting point ofthe stainless steel; copper is one material that is often used for the brazing of stainlesssteel, but it is also possible to use e.g. nickel or iron based brazing material havingadditions of e.g. silicon (Si), phosphor (P), copper (Cu), boron (B) or combinationsthereof to depress the melting temperature.
    It has been found that the strength of a brazed plate heat exchanger oftenexceeds the theoretical strength considering the material and section of the brazingpoints. Cutting and microscoping of the brazing points can explain this discrepancybetween theoretical and actual strength: a significant portion of the strength emanatesfrom diffusion bonding of the stainless steels of neighbouring plates. By diffusionbonding is meant that a part of the joint between the ridges and grooves of theneighboring plates consists of the base material of the neighboring plates, i.e. not thebrazing material. The borderline between diffusion bonding and brazing is not sharp; ifthe crevice that is filled with brazing material is very thin, a large percentage of thebrazing material will diffuse into the material of the articles to be brazed, hence leavinga joint having a large percentage of base material, i.e. the material from which thearticles to be joined are manufactured.
    The brazing material is often provided in form of a thin sheet metal (in the caseof copper, the sheet metal thickness is often about 50 um), but in the case of otherbrazing materials, the brazing material is often applied in form of a paste, whichcomprises the brazing material in form of a metal powder and a binder for making thepaste. Such a brazing method is disclosed in US 7 685 716. According to oneembodiment disclosed in this document, the brazing material is provided in a ringsurrounding contact points between ridges and grooves of neighboring heat exchangerplates. According to this document, it is sufficient to cover only 5-40% of the area withbrazing material.
    Generally speaking, f1nely atomized metal powders are expensive, and due tothe large exposed area/weight unit they are sensitive to surface corrosion. Therefore, itis common to use a grain size of 50-100 um for the brazing material particles in thebrazing material paste.
    Usually, brazing material paste is applied to the areas to be brazed only.
    However, this may lead to problems with large crevices between the objects to be brazed, since brazing material particles will be trapped between the objects tobe brazed. This effect is less pronounced in copper brazing as compared to welding withe.g. iron based brazing materials, since copper is a ductile material having a welldefined melting point, meaning that the objects to be brazed will come closer to oneanother once the brazing material has melted, hence reducing the distance, i.e. thecrevice, between the objects.
    Iron based brazing materials do not have a well defined melting point - rather,they have a melting temperature interval, i.e. some constituents start to melt at a lowtemperature and some constituents melt at a higher temperature. Tests have shown thatthe brazing joints exhibit some disadvantageous properties due to the large crevices.
    The large crevices are also disadvantageous in that a large amount of brazingmaterial is required to fill the crevice with a brazing material. In the case of an iron-based brazing material, excessive amounts of brazing material may lead to melt-throughof the material from which the heat exchanger plate are manufactured.
    US 2010/025 8288 discloses brazing of heat exchanger plates, more specificallybrazing of edge portions of heat exchanger plates. The invention concerns provision of a“pocket” in which superfluous brazing material may be gathered. lt is the object of the present invention to provide a method for decreasing thecrevices during brazing with brazing material pastes, such that stronger brazing jointsmay be formed with less brazing material.
    Another object of the invention is to provide a heat exchanger manufactured by the method according to the invention.
    SUMMARY OF THE INVENTION The above and other problems are solved by a brazing method wherein the stepof applying brazing material close to, but not at, the contact points includes screenprinting the brazing material in half moon-shaped or parentheses-shaped patternsneighboring the contact point. ln order to secure a liquid tight circumferential portion, the method may furtherinclude the step of applying brazing material on skirts surrounding the heat exchanger plates and areas around the port openings that should be joined.
    In order to enable close contact between areas around the port openings ofneighboring plates, the brazing material may be applied in at least one minute grooveextending around said port opening.
    In order to ensure proper coating of the brazing material, the brazing material may be applied in the form of a paste.
    In order to provide a heat exchanger mainly consisting of stainless steel, thebrazing material maybe an iron based brazing material containing a base of stainless steel and additives of melting point depressants, e. g. silicon, boron and/or phosphorus.
    If cost is not that much of an issue, the brazing material may be a nickel based brazing material.
    If cost and resistance against e. g. ammoniac is not an issue, the brazing material may be a copper based brazing material.
    In order to ensure capillary suction forces moving the brazing material into thecrevice or gap neighboring the contact points, the brazing material may be placed suchthat it is in contact with both the ridges of the pressed pattem of one plate and the grooves of the pressed pattem of a neighboring plate.
    In order to provide for an economic production process, the brazing material may be placed on one side of the contact point only.
    In order to break oxide layers of the plates to be brazed, a flux may be providedat the contact points between the neighboring plates.
    In order to break the oxide layer of the plates to be j oined and ensuring properwetting between the brazing material and the material to be brazed, the brazing operation may be performed under a vacuum, a reducing or a protective atmosphere.
    In order to allow for an as close contact as possible between the heat exchanger plates to be brazed, the brazing material may be applied only to areas in which a gap having the height h between the groove of an upper heat exchanger plate and the ridge of a lower heat exchanger plate is larger than the grains of the brazing material.
    According to the above method, it is possible to apply brazing material to a surface corresponding to less than 5% of the entire surface of the heat exchanger plate.
    The method according to the above may preferably be used for brazing abrazed heat exchanger comprising a number heat exchanger plates provided with apressed pattem of ridges and grooves for providing contact points between the heatexchanger plates while keeping the plates on a distance from one another underformation of interplate flow channels for media to exchange heat, wherein port openings are provided for selective fluid communication with the interplate flow channels.
    BRIEF DESCRIPTION OF THE DRAWINGS In the following, the invention will be described with reference to the appendeddrawings, wherein: Fig. 1 is a schematic perspective view showing two heat exchanger platescomprised in a heat exchanger manufactured by a method according to the presentinvention.
    Fig 2 is a top view of one of the heat exchanger plates of Fig. l showing analtemative brazing material application pattem; Fig. Sa is a top view showing the two heat exchanger plates of Fig. l; and Fig. 3b is a section view showing a section along the line A-A in Fig. 3a, and Fig. 4 is a section view showing an exemplary application of brazing material on one of two neighboring heat exchanger plates.
    DESCRIPTION OF EMBODIMENTS Brazed plate heat exchangers generally comprise a number of heat exchangerplates provided with a pressed pattem of ridges R and grooves G adapted to keep theplates on a distance from one another under formation of interplate flow channels formedia to exchange heat. Port openings are provided, usually near the comers of the heatexchanger plates, wherein the port openings are in selective communication with the interplate flow channels. The selective communication is usually achieved by providing areas surrounding the port openings on different levels, such that the areas around theport openings of neighboring plates either contact one another to seal the port openingfrom communication with that particular interplate flow channel or are not contactingone another, such that there will be a fluid connection between the port opening and theinterplate flow channel.
    With reference to Fig. 1, two heat exchanger plates 110, 115 comprised in aheat exchanger 100 (not shown) are shown. Each of the heat exchanger plates 110comprises four port openings 120, 130, 140, 150, wherein the areas surrounding the portopenings 120, 140 are provided on a low level and the areas surrounding the portopenings 130, 150 are provided on a high level. Circular tracks 135, 155 are providedaround the port openings being surrounded with areas being arranged to contact areassurrounding port openings of neighboring plates. As can be seen in Fig. 1, one of theheat exchanger plates is turned 180 degrees in its plane as compared to the other plate,meaning that the areas surrounding the port openings 120 and 140 of the plate 110 willcontact the areas surrounding the port openings 150 and 130 of the plate 115 when theheat exchanger plates 110, 115 are placed in a stack to be brazed into a heat exchanger.Hence, there will be no communication between the port opening 120 of the plate 110and an interplate flow channel formed by the plates 110 and 115.
    However, the areas surrounding the port openings 130 and 150 of the heatexchanger plate 110 will not come into contact with the areas surrounding the portopenings 140 and 120 of the heat exchanger plate 115, hence allowing for a fluidcommunication between the port openings 130 and 150 of the plate 110 via theinterplate flow channel formed by the heat exchanger plates 110, 115.
    It should be noted that the heat exchanger plates 110 and 115 may be of thesame design. However, by providing heat exchangers Both heat exchanger plates 110, 115 are provided with a pressed herringbonepattem comprising the ridges R and grooves G. The herringbone pattems of the platesserve to form the interplate flow channels by the ridges R of the plate 115 contacting thegrooves G of the plate 110, hence forrning contact points having a shape given by theHertzian contact mechanics . The contact points also serve as brazing points holding theplates together. It should be noted that the ridges and grooves shown in f1g. 1 are shownas having flat tops and bottoms, respectively. In reality, however, the tops and bottomsmay be either rounded or have flat tops and bottoms.
    In f1g. 2, an exemplary application pattem of brazing material of one plate is shown more clearly. As can be seen, the tops of ridges R are provided with brazing material on either sides of contact points between the ridges and grooves ofneighbouring plates. As is obvious, the brazing material coating has a certain thickness,and close to the contact points, the brazing material may come in contact with both theridge of the plate on Which the brazing material is provided and the groove of theneighboring plate.
    It should be noted that the embodiment of f1g. 2 is exemplary. In reality, it hasbeen found that the brazing material preferably may be provided in two half moonshapes on both sides of the contact point, wherein the inner circle of the half moonshape faces the contact point. Half moon shapes are generally identical to the shape ofparentheses, e.g. “( )”.
    Moreover, the heat exchanger plates comprises a skirt 160 extending aroundthe periphery of the plate and being arranged to provide a contact With skirts ofneighboring plates in order to provide for a sealing of the interplate flow channelsformed by neighboring plates. The skirts 160 are also provided with a brazing material,such that the skirts of neighbouring plates will be brazed together during a subsequentbrazing operation.
    As implied above, the heat exchanger plates 110, 115 are part of a heatexchanger comprising several heat exchanger plates (at least three, usually ten to onehundred). The heat exchanger plates are brazed together in a process to be describedbelow. ln a first manufacturing step, the position and /or shape of contact pointsbetween the ridges and grooves of neighboring plates are calculated.
    In a second step, brazing material B is applied on the areas surrounding theport openings to be brazed to one another (in the case of Fig. 1, the areas surroundingthe port openings 150 and 130). In one embodiment of the invention, the brazingmaterial is applied into the circular tracks 135, 155 in the area surrounding the portopening to be brazed. Moreover, brazing material is applied to portions of the ridges R;the portions to which brazing material is applied are in the vicinity of, but not at, the crossing point between the ridges R of the plate 115 and the grooves G of the plate 110.
    In this context, “at” means that the brazing material is placed such that the brazingmaterial will keep the ridge R and the groove G of neighboring plates on a distancefrom one another, i.e. such that the distance between the neighboring plates is smallerthan the grain size of the brazing material paste. In both figs. 1 and 2, the appliedbrazing material is shown as small cylinders B, but the brazing material may be provided in any shape in the vicinity of, but not at, the crossing points In a third step, brazing material is applied to the skirt 160.
    In a fourth step, a desired number of heat exchanger plates are placed in astack, wherein brazing material according to the second, third and fourth steps areprovided between each stacked heat exchanger plate.
    In a f1fth step, the stack of heat exchanger plates are placed in a fumace,usually in an atmosphere free from oxygen, wherein the stack of heat exchanger platesis heated suff1ciently to melt the brazing material, hence forrning a brazed heatexchanger.
    In a sixth step, the stack of heat exchanger plates is allowed to cool down, suchthat the brazing material solidif1es in order to keep the plates together and seal the areassurrounding the port openings and the engaging skirts 160 of neighboring plates.
    In f1g. 2, the application pattern of brazing material is shown more clearly.
    It should also be noted that the application of brazing material to the areassurrounding the port openings may be achieved by filling one or more minute groovesbeing pressed into the area surrounding the port opening. The one or more minutegrooves are preferably encircling the port opening, and if more than one groove isprovided, one of the grooves may be provided outside the other.
    It should be noted that in order to manufacture a heat exchanger, morecomponents than the above are needed; for example, there could be a need for a startplate, which may be identical to the heat exchanger plates but not provided with portopenings, and an end plate, which may be similar to the heat exchanger plates but havean entire area close to the port openings provided in the same plane. Start and end platesand their design are well known by persons skilled in the art and are therefore not morethoroughly described.
    The invention resides in a method for decreasing the crevices between theplates by not providing any brazing material in the contact points. It has namely beenfound that the provision of brazing material in the contact points will keep the ridgesand grooves of the neighboring plates on a distance from one another at least until thebrazing material has melted completely. The problem is that once the brazing materialhas melted completely, some of the brazing material has been dissolved into the sheetmetal from which the heat exchanger plates have been manufactured, hence reducingthe amount of brazing material usable for creating a strong joint.
    So, instead of providing the contact point with brazing material, as was thecase with the prior art brazing, the brazing material is provided just beside the contact point.
    Another reason that the brazing j oints may be stronger may be diffusionbonding. In theory, diffusion bonding involves no liquid fusion or f1ller metal; however,in the present case, it might be that once the brazing material starts to melt (which in thecase of a single metal brazing material occurs at a certain temperature and in the case ofan alloy at a temperature interval), the melted brazing material will be sucked into thevery narrow crevice that is inevitably formed between two metal surfaces due tomaterial roughness by capillary forces. Once in the extremely narrow crevice, themelted brazing material will start to dissolve into the sheet metal from which the heatexchanger plates is manufactured, in effect leaving a brazing joint more or less being ofthe same material as the material from which the heat exchanger plates aremanufactured. This is not a “pure” diffusion bonding, but it comes rather close.
    In one embodiment of the invention, the brazing material is placed such thatthe brazing material will contact both of the neighboring plates. This is beneficial in thatthe brazing material will start to get drawn into the slot or crevice surrounding thediffusion bonding portion of the contact between the ridges and grooves of theneighboring plates by capillary forces.
    An example of this is shown in Fig. Sa and 3b. In fig. 3a, the heat exchangerplates ll0, ll5 is shown, and in Fig. 3b, a section along a line A-A is shown.
    As can be seen in Fig. 3b, the brazing material B is applied on the tops of theridges R of the plate ll5, but they are in contact with sides of the grooves G of the platell0. This contact has the effect that there will be an immediate capillary action on thebrazing material to be drawn by capillary forces into the crevice between the ridge R ofthe plate ll5 and the groove G of the plate ll0. In another embodiment, shown in Fig.l, brazing material is provided both on the tops of the ridges R and on the flanksthereof; this may seem awkward at a first glance, but it actually makes sense - byproviding brazing materials on the flanks of the ridges R, it is possible to surround thecontact points between the crossing ridges and grooves of neighboring plates withbrazing material all around the contact point. Moreover, if the brazing material isprovided close enough to the top of the ridge R, it is possible to realize a contactbetween the brazing material B, the plate ll0 and the plate ll5.
    In Fig. 4, another feature of the present invention is shown in detail. Fig. 4 is anexemplary section view of the contact between a groove G of an upper heat exchangerplate and a ridge R of a lower heat exchanger plate, taken along the line A-A of Fig. Sa.
    As can be seen in Fig. 4 the contact point between the a groove G of an upper heat exchanger plate and a ridge R of a lower heat exchanger plate is actually an area, denoted CA, the shape of which being given by the Hertzian contact equations,in which area CA the groove G of an upper heat exchanger plate and the ridge R of alower heat exchanger plate actually will contact one another. In this context, “contact”is defined as a contact without any clearance between the parts, except for unavoidableclearances formed by dirt, oxide layers and the like. The contact area will be surroundedby a narrowing gap having a height h which depends on the distance from the contactarea CA. Close to the contact area, the height h will increase virtually linearly with thedistance from the contact area, and according to the invention, brazing material willonly be applied to areas neighboring the contact area, but not closer than the eight hbeing larger than a grain size of the brazing material B. By respecting this limit for howclose to the contact area the brazing material may be applied, it can be secured that thebrazing material does not interfere with the contact areas. It can also be assured that thebrazing material does not hinder the groove G of an upper heat exchanger plate and theridge R of a lower heat exchanger plate will contact one another at an as large contactarea as possible.
    In Fig. 4, the area in which no brazing material shall be applied is denoted W.This area corresponds, as mentioned above, to the area in which the gap having theheight h between the groove G of an upper heat exchanger plate and ridge R of a lowerheat exchanger plate is smaller than the grains g of the brazing material B. ln a preferred embodiment of the invention, the brazing material B is applied inthe shape of two half moons or two parenthese signs partly surrounding the contactpoint within the limits disclosed above in conjunction to fig. 4. Preferably, the flangesof the ridge R are located in the space between the halfmoon or parentheses signs.
    In one of the preferred embodiments of the invention, a flux breaking the oxidelayer of the metal from which the plates to be joined is manufactured may be applied tothe parts to be joined. Preferably, this flux is applied to an area being situated betweenthe areas provided with brazing material. It should be noted that a flux does not containany particles that will keep the neighbouring plates on a distance from one another;hence, flux may be provided between the plates without departing from the scope of theinvention. lt is also possible to break the oxide layer e. g. by providing a reducing atmosphere. ll APPLICATION PROCESS In one embodiment of the invention, the brazing material is applied in the formof a paste that is applied by screen-printing. Screen-printing is a method that is wellknown; it comprises an impermeable screen provided with permeable areas. Application(or printing) is effected by Contacting an underside of the screen With the area to beprinted, after which the brazing material paste is applied to an upper side of the screen.The brazing material paste will pass the screen in the permeable areas; hence, thecorresponding areas of the surface to be printed will come in contact with the brazingmaterial, leading to those areas being coated with the brazing material, whereas theareas covered by the impermeable screen portions will not.
    According to the prior art, the brazing material may be applied in a ringsurrounding the contact point between the groove G of an upper heat exchanger plateand ridge R of a lower heat exchanger plate. However, tests have shown that applicationin a ring is not suitable if screen printing is used, since printing on the flanges of theridge R will make it impossible, or at least very difficult, to achieve an even thicknessof the brazing material due to the screen not being able to contact the flanges properly.
    By applying the brazing material in a half moon shape, or in form of twoparentheses signs partly encircling the contact point, this problem is solved, or at leastmitigated, since a smaller portion of the brazing material is applied on the flanges of theridge R if the brazing material is applied in this manner.
    It should be noted that according to the disclosed method, a major leapconcerning the ratio of coated/uncoated surface is achieved. According to the prior art,the percentage of coated area ranges between 5% and 40%; according to the presentinvention, the percentage coated area may be below 5%, while maintaining a greatstrength of the brazed connections.
    权利要求:
    Claims (14)
    [1] 1. l. Method for brazing a plate heat exchanger comprising a stack of heat exchangerplates (1 10,1 15) provided with a pressed pattern of ridges (R) and grooves (G) adapted toform contact points between the plates (110, 115) and provide for interplate flow channels formedia to exchange heat, said interplate flow channels being in selective fluid communicationswith port openings (120, 130, 140, 150) provided near corners of the heat exchanger plates(110, 115), the method including the steps of: i. calculating or measuring the exact position of all contact points between the ridges(R) and grooves (G) of the neighboring plates (110, 115); ii. applying brazing material (B) close to, but not at, the contact points; iii stacking heat exchanger plates (1 10, 115) provided with brazing material to astack ; iv. placing the stack of heat exchanger plates (110, 115) in a furnace; v. heating the stack of heat exchanger plates (110, 115) to a temperature sufficientfor melting the brazing material (B), and vi. allowing the stack of heat exchanger plates (110, 115) to cool down such that thebrazing material (B) solidifies and binds the plates (110, 115) together, the method being characterised in that step ii. includes screen printing the brazingmaterial (B) in half moon-shaped or parentheses-shaped patterns neighboring the contactpoint.
    [2] 2. The method of claim 1, including the further step of:applying brazing material (B) on skirts (160) surrounding the heat exchanger plates(110, 115) and areas around the port openings (120, 130, 140, 150) that should be joined.
    [3] 3. The method of claim 2, wherein the brazing material (B) is applied in at least one minute groove extending around said port opening.
    [4] 4. The method according to any of the previous claim, wherein the brazing material(B) is applied in the form of a paste.
    [5] 5. The method according to any of the preceding claims, wherein the brazingmaterial (B) is an iron based brazing material containing a base of Stainless steel and additivesof melting point depressants, e. g. silicon, boron and/or phosphorus.
    [6] 6. The method according to any of the claims 1-4, wherein the brazing material is a nickel based brazing material. 1 3Amendment copy
    [7] 7. The method according to any of the claims 14353, wherein the brazing material is a copper based brazing material.
    [8] 8. The method according to any of the preceding claims, wherein the brazingmaterial (B) is placed such that it is in contact with both the ridges (R) of the pressed patternof one plate (115) and the grooves (G) of the pressed pattern of a neighboring plate (110).
    [9] 9. The method of any of the claims 1-7, wherein the brazing material (B) is placed on one side of the contact point only.
    [10] 10. The method of any of the preceding claims, wherein a flux is provided at thecontact points between the neighboring plates (1 10, 1 15).
    [11] 11. The method according to any of the preceding claims, wherein the brazingoperation is performed under a vacuum, a reducing or a protective atmosphere.
    [12] 12. The method according to any of the preceding claims, wherein the brazingmaterial (B) is applied only to areas in which a gap having the height (h) between the groovea(G) of an upper heat exchanger plate and the ridge (R) of a lower heat exchanger plate islarger than the grains (g) of the brazing material (B).
    [13] 13. The method according to any of the preceding claims, wherein the brazingmaterial is applied to a surface corresponding to less than 5% of the entire surface of the heatexchanger plate.
    [14] 14. A brazed heat exchanger comprising a number heat exchanger plates (110, 115)provided with a pressed pattern of ridges (R) and grooves (G) for providing contact pointsbetween the heat exchanger plates (110, 115) while keeping the plates (110, 115) on adistance from one another under formation of interplate flow channels for media to exchangeheat, wherein port openings (120, 130, 140, 150) are provided for selective fluidcommunication with the interplate flow channels, characterised in that the heat exchangerplates (110, 115) are brazed to one another by the method as defined in any of the preceding claims.
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    同族专利:
    公开号 | 公开日
    WO2015062992A1|2015-05-07|
    US20160250703A1|2016-09-01|
    KR20160075769A|2016-06-29|
    EP3062949A1|2016-09-07|
    EP3062949B1|2018-11-28|
    CN105705284B|2019-05-31|
    CN105705284A|2016-06-22|
    WO2015062992A9|2015-11-12|
    JP2017503655A|2017-02-02|
    TR201902746T4|2019-03-21|
    SE1451294A1|2015-04-30|
    SI3062949T1|2019-05-31|
    JP6751019B2|2020-09-02|
    KR102277174B1|2021-07-14|
    US10035207B2|2018-07-31|
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    法律状态:
    2020-02-25| OPRJ| Opposition has been rejected|
    优先权:
    申请号 | 申请日 | 专利标题
    SE1351284|2013-10-29|
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