CN109696073B - Box-type laminated heat exchanger with special backing plate thickness - Google Patents
Box-type laminated heat exchanger with special backing plate thickness Download PDFInfo
- Publication number
- CN109696073B CN109696073B CN201910115084.6A CN201910115084A CN109696073B CN 109696073 B CN109696073 B CN 109696073B CN 201910115084 A CN201910115084 A CN 201910115084A CN 109696073 B CN109696073 B CN 109696073B
- Authority
- CN
- China
- Prior art keywords
- plate
- heat exchange
- heat exchanger
- plates
- thickness
- 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.)
- Active
Links
- 238000005219 brazing Methods 0.000 claims abstract description 155
- 239000000463 material Substances 0.000 claims abstract description 23
- 238000010030 laminating Methods 0.000 claims abstract description 5
- 230000002093 peripheral effect Effects 0.000 claims description 35
- 229910052751 metal Inorganic materials 0.000 claims description 30
- 239000002184 metal Substances 0.000 claims description 30
- 239000000945 filler Substances 0.000 claims description 29
- 238000010276 construction Methods 0.000 claims description 5
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000005192 partition Methods 0.000 abstract description 3
- 229910052782 aluminium Inorganic materials 0.000 description 47
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 47
- 239000010410 layer Substances 0.000 description 29
- 238000000034 method Methods 0.000 description 23
- 230000008569 process Effects 0.000 description 23
- 229910000679 solder Inorganic materials 0.000 description 16
- 238000002844 melting Methods 0.000 description 13
- 230000008018 melting Effects 0.000 description 13
- 239000012530 fluid Substances 0.000 description 9
- 230000005484 gravity Effects 0.000 description 7
- 239000011295 pitch Substances 0.000 description 7
- 244000089409 Erythrina poeppigiana Species 0.000 description 6
- 235000009776 Rathbunia alamosensis Nutrition 0.000 description 6
- 238000007789 sealing Methods 0.000 description 6
- RTAQQCXQSZGOHL-UHFFFAOYSA-N Titanium Chemical compound [Ti] RTAQQCXQSZGOHL-UHFFFAOYSA-N 0.000 description 5
- 230000008859 change Effects 0.000 description 5
- 238000009826 distribution Methods 0.000 description 5
- 238000004519 manufacturing process Methods 0.000 description 5
- 239000010936 titanium Substances 0.000 description 5
- 229910052719 titanium Inorganic materials 0.000 description 5
- 238000005056 compaction Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 238000003475 lamination Methods 0.000 description 4
- 239000000155 melt Substances 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 2
- 230000002929 anti-fatigue Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 238000003825 pressing Methods 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 238000005476 soldering Methods 0.000 description 2
- 238000003892 spreading Methods 0.000 description 2
- 230000007480 spreading Effects 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical group [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 238000010924 continuous production Methods 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
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000008092 positive effect Effects 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
Classifications
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2275/00—Fastening; Joining
- F28F2275/06—Fastening; Joining by welding
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
A box-shaped laminated heat exchanger with special backing plate thickness is formed by laminating a plurality of box-shaped heat exchange plates with inclined surfaces at the periphery, wherein the inclined surface angle a of the inclined surfaces at the periphery of the heat exchange plates is related to the material thickness t of the heat exchange plates and the plate spacing h between layers formed by laminating the plurality of heat exchange plates, and the relation of the three values is a sine trigonometric function: sin a= [ t/(h+t) ], in each plate interval layer in the box-shaped laminated heat exchanger, there are heat exchange device capable of making partition wall heat exchange and corner holes for heat exchange medium to circulate, the heat exchange device is positioned in the middle of each heat exchange plate, the corner holes are distributed at two ends of each heat exchange plate, and on each heat exchange plate there are backing plates, and its characteristic is that the actual thickness of the backing plate is less than the plate interval h after assembly and before brazing.
Description
Technical Field
The invention relates to a heat exchanger, in particular to a box-shaped laminated heat exchanger with a special backing plate thickness.
Background
The box-shaped laminated heat exchanger is formed by sequentially and horizontally laminating a plurality of box-shaped heat exchange plates with inclined planes at the periphery, and because in a single box-shaped laminated heat exchanger, the inclined plane angle a of each heat exchange plate peripheral inclined plane is the same, after each heat exchange plate is horizontally laminated, assembled and pressed and each peripheral inclined plane is mutually stuck tightly and stably, a certain number of plate spacing h is parallel between each heat exchange plate, and therefore, the inclined plane angle a of each heat exchange plate peripheral inclined plane is related to the material thickness t of the heat exchange plate and each parallel plate spacing h, and the relation of the three numbers is a sine trigonometric function: sin a= [ t/(h+t) ], in the box-shaped laminated heat exchanger, in each parallel plate interval layer, there are heat exchange device capable of making partition wall heat exchange and corner holes for heat exchange medium to flow through, the heat exchange device is positioned in the middle of each heat exchange plate, and the corner holes are distributed at two ends of each heat exchange plate.
The aluminum box-shaped laminated heat exchanger is only exemplified herein by being manufactured using a vacuum brazing process. Because each aluminum box-shaped laminated heat exchanger has to be in a stacking mode in the vacuum brazing furnace, the bottom aluminum box-shaped laminated heat exchanger is stressed by excessive gravity in the brazing process. And because the brazing temperature is higher, the strength of the whole aluminum box-shaped laminated heat exchanger heated to the melting temperature of the brazing filler metal is very low at the high brazing temperature, and under the impact of electric heating and the natural gravity compression of the aluminum box-shaped laminated heat exchanger stacked in a stack, the aluminum box-shaped laminated heat exchanger stacked in the bottom layer is extremely easy to skew and deform in the high-temperature brazing process due to the restraint and compression of a brazing clamp, the anti-explosion pressure value and the anti-fatigue capability of the product are also reduced, and even the peripheral inclined plane of the aluminum heat exchange plate after brazing can have a local leakage phenomenon.
For this purpose, aluminum shim plates have to be added layer by layer to the aluminum heat exchanger plates of the aluminum box-shaped stacked heat exchanger manufactured by the vacuum brazing process, in particular in the space formed by the corner holes and the peripheral extension planes at both ends of the heat exchanger plates. The thickness of the aluminum backing plate on the same heat exchange plate is the same, and the material of the aluminum backing plate is similar to the material of the heat exchange plate core plate base material, and is aluminum high-melting-point material. The aluminum backing plates are symmetrically and identically arranged on the heat exchange plates of the same aluminum box-shaped laminated heat exchanger layer by layer. Therefore, in the aluminum vacuum brazing process, the stacked aluminum box-shaped laminated heat exchangers are pressed by gravity and restrained and pressed by the brazing clamp, the aluminum backing plates stacked layer by layer on each heat exchange plate resist the pressing of all gravity, and the aluminum box-shaped laminated heat exchangers can be prevented from being inclined and deformed under the restraint of the brazing clamp.
However, in the actual brazing process, the actual thickness of the added backing plate should be smaller than the value of the spacing between the parallel plates formed by stacking and assembling a plurality of heat exchange plates before brazing, that is, the actual thickness of the backing plate is smaller than the value of the spacing h between the plates in the above sine trigonometric function relation sina= [ t/(h+t) ].
This is because the non-brazed aluminum heat exchange plate is made by rolling a layer of relatively low melting point aluminum solder on both the front and back sides of the high melting point core plate base material, and the thickness of the single-sided aluminum solder is generally about 10% of the total thickness of the aluminum heat exchange plate. The thickness t of the plate before brazing the aluminum heat exchange plate actually comprises the thickness of the core plate parent metal and the total thickness of the rolled brazing filler metal on the front side and the back side of the core plate. That is, the thickness t of the plate in the sine trigonometric function sin a= [ t/(h+t) ] is only the thickness of the plate after the aluminum heat exchange plates are assembled and before brazing, and the plate spacing h in the sine trigonometric function formula should also be only the plate spacing after the aluminum heat exchange plates are assembled and compressed in parallel, and the inclined planes of the plate spacing are mutually stuck and stabilized and before brazing.
In the actual brazing process, the brazing filler metals with low melting points rolled on the front surface and the back surface of the aluminum core plate base metal can be melted and distributed. It will thus be found that the thickness t of each aluminium heat exchanger plate will be thinned during the brazing process due to melting and spreading of the low melting solder. Because the brazing process does not change the bevel angle a of the periphery of the heat exchange plate, or the change of the bevel angle a of the periphery of the heat exchange plate is negligible in the brazing process, in view of the functional relationship among three values in the sine trigonometric function formula sin a= [ t/(h+t) ] described above, when the value of the plate thickness t becomes smaller in the brazing process, the value of the plate spacing h necessarily becomes smaller. That is, the thickness of the plate during and after brazing is smaller than the thickness t of the plate before brazing due to the melting and distribution of the brazing filler metal, and the plate spacing after brazing is naturally smaller than the value of the plate spacing h before brazing on the premise that the bevel angle a does not change.
According to the actual existence that the plate pitch of the aluminum box-shaped laminated heat exchanger becomes smaller after brazing, if an aluminum backing plate is placed on the aluminum heat exchange plate, when the heat exchange plate and the backing plate are assembled before brazing, the plate pitch h generated when the heat exchange plates are laminated and compressed in parallel and are mutually stuck tightly and stably through respective inclined planes should be larger than the actual thickness of the backing plate thereof. I.e. the shim plates added layer by layer on the heat exchanger plates should have a particularly suitable thickness, which shim plates should be clearly smaller than the plate spacing h during parallel assembly and pressing of the heat exchanger plates and before brazing.
Therefore, the brazing filler metal on the front and back sides of each heat exchange plate can be guaranteed to be melted and distributed in the brazing process and naturally sink under the gravity, so that the heat exchange plates and the backing plates with special ideal thickness are finally attached to each other and abutted against each other, and the inclined surfaces are still continuously attached to each other along with the natural sinking process of the heat exchange plates after the brazing filler metal on the peripheral inclined surfaces is melted and distributed. After brazing, each added backing plate and the upper and lower heat exchange plates are mutually adhered and brazed and sealed, and simultaneously, each inclined surface is mutually adhered and brazed and sealed.
In fact, such a so-called shim plate of the desired thickness does not naturally exist. If the thickness of the backing plate is equal to the plate spacing h before brazing, or the thickness of the backing plate is randomly selected to be smaller than the plate spacing h before brazing, but is obviously larger than the ideal backing plate thickness, the heat exchange plates naturally sink after the brazing filler metal melts and flows, and after the heat exchange plates are mutually collided with the backing plate, the heat exchange plates do not sink any more due to thicker backing plate. At this time, the backing plate and the heat exchange plate should be tightly attached, but a gap between inclined planes at the periphery of the heat exchange plate is still large, and if the gap between the inclined planes is larger than the filling property of the brazing filler metal, the local unwelding and leakage between certain inclined planes may occur.
If the thickness of the backing plate is determined randomly, the thickness of the backing plate is obviously smaller than that of an ideal backing plate, after all brazing filler metal between the peripheral inclined planes of each heat exchange plate is melted and distributed, core plate base materials with high melting points are stably and tightly attached, so that the heat exchange plate core plates are prevented from sinking continuously, the heat exchange plates and the obviously thinner backing plate are not attached tightly and leave gaps, when the gaps between each heat exchange plate and the backing plate are larger than the filling property of the brazing filler metal, the phenomenon that products can be scrapped such as cavity stringing possibly occurs between corner holes, and the phenomenon that the products are askew and deformed still occurs during and after brazing.
It will be understood that the desired thickness values of the shim plate are not only to resist the high pressure and to avoid skewing and deformation of the aluminum box stack heat exchanger during aluminum vacuum brazing, but more importantly, once the shim plate is added, the thickness of the shim plate will not only affect the brazing quality and reliability of the peripheral inclined surfaces of the heat exchange plates, but also the brazing quality and reliability between the shim plate and the upper and lower heat exchange plates.
The prior art with a gasket in a box-like stacked heat exchanger is disclosed in three patents 2013104395763, 2016213977419, 2017209670864, all of which describe the presence of a gasket like that described in this specification. However, there is no discussion in these three patents as to whether there is a particular relationship between the thickness of the shim plate and the plate spacing h prior to brazing, nor is there any description that the shim plate thickness should be less than the plate spacing h prior to brazing of each heat exchanger plate and have a particularly suitable thickness.
In order to further understand the background art of box-shaped stacked heat exchangers with backing plates, a detailed analysis of the three patents already disclosed above is necessary.
The last sentence of claim 1 of patent 2013104395763 is known: the "height of the comb-shaped pad is the same as the height of the circulation space of the heat exchange medium formed by the extending surfaces around the corner holes", and the "height of the heat exchange device is the same as the height of the corresponding fluid channel" is also stated in the claim 1, so that the height of the comb-shaped pad placed in the circulation space of the corner holes is equal to the height of the single fluid channel "as expressed in the eighth natural section of the description of the invention.
The comprehensive understanding is that: the height of the comb-shaped backing plate is the same as the height of the corner hole flow space and is also equal to the height of the single fluid channel. Whereas in a box-shaped stacked heat exchanger the so-called individual fluid channel height is equal to the plate spacing. Most importantly, the plate spacing referred to herein in this patent 2013104395763 should be one that is specific to the plate spacing that is to be formed during assembly prior to brazing. Since the "height of the comb-shaped shim plate placed in the angular hole flow space" expressed in the eighth paragraph of this description is equal to the height of the individual fluid channels ", in particular the meaning of" placing "is meant, whereas" placing "the comb-shaped shim plate should be a certain necessary action in the assembly phase, since the comb-shaped shim plate after soldering is not possible to" place "into, the meaning of" placing "the comb-shaped shim plate only exists in the assembly before soldering. It can be confirmed that the last sentence "the height of the comb-shaped pad is the same as the flow space height of the heat exchange medium corner hole formed by the peripheral extension surface of the corner hole" in claim 1 of the patent 2013104395763, and because of the meaning of "placement" in the patent specification, it can be considered that the height of the comb-shaped pad should be the same as the plate spacing h after assembling and compressing each heat exchange plate and before brazing, and the height of the comb-shaped pad should be the same as the plate spacing h in the sine trigonometric function calculation formula sina= [ t/(h+t) ] described above. It is understood that the patent document does not specifically describe that there is also an unequal relative relationship between the actual height of the comb-shaped shim plate and the plate spacing h before brazing, and does not describe that the added comb-shaped shim plate height should be smaller than the plate spacing h after the heat exchanger plates are assembled and compressed and before brazing.
The height of the comb-shaped base plate is the thickness of the comb-shaped base plate.
The utility model patent 2016213977419 also explicitly describes in claim 1 that the thickness of the corner hole shim plate is the same as the height of the space formed by the corner holes and by the peripheral extension at both ends of the heat exchanger plate, and in paragraph 0005 of the description "summary of the utility model" it is also described that the object of the utility model is to replace the comb-shaped shim plate with fins in order to reduce the manufacturing costs. For this reason, it can be understood that the "the thickness of the corner hole pad plate is the same as the height of the space formed by the corner holes and the peripheral extension surfaces at the two ends of the heat exchange plate" in claim 1 of the patent 20162139774194 is the same as the plate spacing h after assembling and compressing each heat exchange plate and before brazing, and the value of the plate spacing h in the sinusoidal trigonometric function formula sin a= [ t/(h+t) ] is the same. It is understood that, in particular, the patent document does not explicitly describe at all that there is also an unequal relative relationship between the actual thickness of the shim plate and the spacing h of the plates before brazing. It is not stated that the thickness of the added shim plate should be smaller than the plate spacing h after the heat exchanger plates are assembled and compressed and before brazing.
The utility model patent 2017209670864 also specifies that "the thickness of the two pads is the same and the same as the thickness of the heat exchanger device in the middle of the heat exchanger plate" is specified in claim 1. Meanwhile, in this patent specification, "summary of the utility model" 0006, it is also explicitly stated that the object of the utility model is to make it possible for the shim plate to avoid the R-connection transition that exists between the peripheral bevel of the heat exchanger plate and its bottom plane when assembled in the heat exchanger plate. That is, in this patent 2017209670864, the same shim plate thickness as the heat exchanger is intended to refer specifically to the form of the heat exchanger plate as it is "assembled" and prior to brazing. It can also be understood that the thickness of the backing plate is the same as the thickness of the heat exchange device, the plate spacing formed after lamination, assembly and compaction of each heat exchange plate before brazing is the same as the value representing the plate spacing h in the sine trigonometric function formula sina= [ t/(h+t) ] above. In addition, in the patent 2017209670864, it is not explicitly stated that there is also an unequal relative relationship between the actual thickness of the shim plate and the plate spacing before brazing, and it is not further stated that the thickness of the shim plate added should be smaller than the plate spacing h after packing and before brazing of each heat exchanger plate.
Furthermore, in the published patent application 028286839, the form of the pad is also described as similar to that described in the present specification. In particular, in the first row above the sixth page of the patent document, "16 is a fluid-guiding sheet material having the same thickness as the titanium plate fin 17", and it is understood that the so-called "fluid-guiding sheet material" is similar to the shim plate described in the present specification.
Although no similar word is mentioned in the 028286839 document of this patent, it is said in the "background art" of the specification: "it is produced by coating or filling solder on the joint portion of each chevron plate material". The need for solder filling as described in this patent 028286839 is described in the specification; the vacuum heating furnace is heated to 850 ℃ and brazing is carried out below 880 ℃. It can be concluded that the manufacturing method of the patent should be brazing. While the brazed plate heat exchangers are all sealed by brazing with peripheral inclined planes, and the plate spacing phenomenon is necessarily present. It will then be appreciated that the heat exchanger described in this patent document should resemble a box-shaped stacked heat exchanger.
For this purpose it will be understood that the thickness of the titanium plate heat sink 17 should be the plate spacing before brazing, while "16 is the fluid-conducting plate material and the same thickness as the titanium plate heat sink 17" will be understood to mean that the fluid-conducting plate material has the same thickness as the plate spacing. It is also understood that in this patent, the meaning of the described pilot fluid sheet thickness as the titanium plate fin 17 includes that the pilot fluid sheet thickness is the same as the value representing the plate spacing h in the above-described sine trigonometric function formula sina= [ t/(h+t) ]. It can thus be determined that the patent document does not disclose that there is also an unequal relative relationship between the actual thickness of the guide fluid sheet material and the plate spacing prior to brazing, nor that the thickness of the guide fluid sheet material added should be less than the plate spacing h after packing and prior to brazing of the individual heat exchanger plates.
It will be appreciated that if the above-mentioned box-shaped stacked heat exchangers include those made of different materials such as aluminum or stainless steel and titanium plates, if the thickness t of the plate before brazing includes the thickness of the brazing filler metal, if the plate is required to be placed layer by layer on each heat exchange plate before assembling and brazing, the thickness t of the original plate becomes smaller after the brazing filler metal melts, and in order to ensure that the peripheral inclined planes of each heat exchange plate are brazed and sealed together, the plate on the heat exchange plate is also tightly attached to the upper and lower heat exchange plates and brazed and sealed together, and the thickness of the plate is always smaller than the plate spacing h formed after stacking, assembling and compressing each heat exchange plate before brazing, and is also smaller than the value of the plate spacing h in the sine trigonometric function calculation formula sin a= [ t/(h+t) ]. The actual ideal thickness of the backing plate of different materials is smaller than the calculated plate spacing h of the sine trigonometric function to different degrees.
That is, in each of the conventional patent documents, if a shim plate is described to be added layer by layer to each heat exchange plate in a box-shaped stacked heat exchanger at the time of product assembly, there is no concern that the actual thickness of the shim plate should be different from the plate spacing before brazing, and there is no clear explanation that the actual thickness of the shim plate should be smaller than the actual value of the plate spacing h after stacking, assembling and compacting each heat exchange plate and before brazing in the sine trigonometric function formula sina= [ t/(h+t) ] described above.
It is considered that if the backing plates with ideal thickness are added layer by layer on each heat exchange plate in the box-type laminated heat exchanger, the peripheral inclined planes of each heat exchange plate are mutually sealed and brazed together after brazing, and meanwhile, the backing plates on each heat exchange plate are closely attached to the upper heat exchange plate and the lower heat exchange plate to be mutually sealed and brazed together. The plate spacing value between the heat exchange plates in the product qualified by brazing is equal to the value of the thickness of the backing plate. The values of the plate spacing after brazing should be smaller than the values of the plate spacing h after lamination and assembly and before brazing of the heat exchange plates of the box-type laminated heat exchanger. Of course, the thickness of the plate of the heat exchange plate after brazing is also smaller than the value of the thickness t of the plate before the box-shaped laminated heat exchanger is assembled and brazed.
That is, although the existence of the shim plate is mentioned in some of the box-shaped laminated heat exchangers, the shim plate needs to have a special thickness requirement because the plate spacing h after lamination and compaction of each heat exchange plate and before brazing is larger than the actual shim plate thickness added layer by layer. Knowing and presetting the thickness of the shim plate has certain difficulty and requires numerous failed experience accumulation and insight, so it is considered that in the existing various box-shaped stacked heat exchangers, at least not specifically pointed out in each patent document, the actual thickness of the shim plate added layer by layer is different from the plate spacing h before brazing, and the actual ideal thickness of the shim plate should be smaller than the plate spacing h before brazing.
Through careful theoretical analysis and a great deal of practice, at least in order to ensure that the aluminum box-shaped laminated heat exchanger cannot be skewed and deformed in the vacuum brazing process, in order to improve the use reliability of the product and in order to improve the performance factors such as the explosion-proof pressure value and the fatigue resistance of the product, it is confirmed that when the aluminum box-shaped laminated heat exchanger is assembled, aluminum backing plates are required to be added layer by layer in each heat exchange plate, and the thickness of the backing plates is smaller than the plate distance h after lamination and compaction and before brazing of each aluminum heat exchange plate, and the thickness of the aluminum backing plates has a special value.
Disclosure of Invention
The invention mainly aims to avoid the deflection and deformation possibly generated in the brazing process of the whole aluminum box-shaped laminated heat exchanger product when the box-shaped laminated heat exchanger is manufactured, especially when the vacuum brazing process is adopted to manufacture the aluminum box-shaped laminated heat exchanger, improve the brazing qualification rate and the use reliability, and improve the explosion-proof pressure value and the fatigue resistance of the product, so that the aluminum box-shaped laminated heat exchanger can be widely applied to heat exchange requirements of high-pressure working environments.
The invention aims at realizing the scheme that the box-shaped laminated heat exchanger is formed by sequentially and horizontally laminating a plurality of box-shaped heat exchange plates with inclined surfaces at the periphery, and because in the single box-shaped laminated heat exchanger, the inclined surface angle a of the inclined surfaces at the periphery of each heat exchange plate is the same, after the heat exchange plates are horizontally laminated, assembled and pressed and the inclined surfaces at the periphery are mutually stuck and stabilized, a certain number of plate intervals h are parallel between the heat exchange plates, and for this reason, the inclined surface angle a of the inclined surfaces at the periphery of the heat exchange plates is related to the material thickness t of the heat exchange plates and the plate interval h existing in parallel, and the relation of the three numbers is a sine trigonometric function: sin a= [ t/(h+t) ], in the box-shaped laminated heat exchanger, in each parallel plate interval layer, there are heat exchange device capable of making partition wall heat exchange and angle holes for heat exchange medium to circulate, the heat exchange device is positioned in the middle of each heat exchange plate, the angle holes are distributed at two ends of each heat exchange plate, and each heat exchange plate is equipped with a backing plate, and its characteristic is that the actual thickness of the backing plate is not equal to the value of plate interval h in the above-mentioned sine trigonometric function calculation formula sin a= [ t/(h+t) ] formed after each heat exchange plate is assembled and compressed and before brazing in the box-shaped laminated heat exchanger.
In a single box-shaped laminated heat exchanger, the actual thickness of the backing plate on each heat exchange plate is smaller than the value of the plate spacing h formed after the heat exchange plates are assembled and compressed and before brazing in the box-shaped laminated heat exchanger.
In a single box-shaped laminated heat exchanger, after each heat exchange plate is brazed, the peripheral inclined planes of the heat exchange plates are mutually sealed and brazed together through brazing filler metal filling, and meanwhile, the backing plate on each heat exchange plate is closely attached to the upper heat exchange plate and the lower heat exchange plate through brazing filler metal filling and mutually sealed and brazed together.
In a single box-shaped laminated heat exchanger, in the space formed by the corner holes and the peripheral extension planes at the two ends of each heat exchange plate, a backing plate with a wide plate structure and ideal thickness is added layer by layer, and through holes for circulating heat exchange media A are formed in the backing plate.
In a single box-shaped stacked heat exchanger, on each heat exchange plate, in the space formed by the corner holes and the peripheral extension planes at both ends of the heat exchange plate, a backing plate of a wide plate structure and having a desired thickness is added layer by layer, in which not only a through hole structure through which the heat exchange medium a flows but also a structure through which the heat exchange medium B flows into the heat exchange device is provided on one side of the backing plate.
In a single box-shaped stacked heat exchanger, the positions of the backing plates are symmetrical and identical on each heat exchange plate.
In a single box-shaped stacked heat exchanger, the shim plate is of a narrow strip construction on each heat exchanger plate.
In a single box-shaped stacked heat exchanger, on each heat exchanger plate, the shim plates may be placed not only in the space formed by the angular holes and the peripheral extension plane at both ends of the heat exchanger plate, but also in any suitable position on the heat exchanger plate.
In a single box-shaped stacked heat exchanger, the shim plates are placed transversely on each heat exchanger plate.
In a single box-shaped stacked heat exchanger, the shim plates are placed longitudinally on each heat exchanger plate.
In a single box-shaped stacked heat exchanger, the shim plate is placed diagonally on each heat exchanger plate.
The invention has the following advantages and positive effects:
1. the whole box-shaped laminated heat exchanger product can be prevented from being skewed and deformed possibly during the brazing process.
2. The compactness of the brazing seam can be improved.
3. The anti-burst pressure value and the anti-fatigue capability of the product can be improved.
4. The brazing qualification rate and the use reliability can be improved.
5. The aluminum vacuum brazing technology is adopted to manufacture the heat exchanger, so that the inside of the heat exchanger can be guaranteed to have extremely high cleanliness.
6. The aluminum box-shaped laminated heat exchanger can meet the requirement of most heat exchange media on corrosion resistance.
7. The aluminum box-shaped laminated heat exchanger with the backing plate is suitable for heat exchange requirements of high-pressure working environments such as refrigeration, heat pumps and the like.
Drawings
The invention will be further described with reference to the accompanying drawings.
FIG. 1 is a schematic sectional view of an assembled product of the same sheet thickness and the same backing plate thickness before brazing
FIG. 2 is a schematic drawing showing a cross section of solder melting during brazing of a product having the same sheet thickness and the same backing plate thickness
FIG. 3 is a schematic cross-sectional view of a product of the same sheet thickness and the same backing plate thickness after brazing
FIG. 4 is a schematic cross-sectional view of a product of different sheet thickness and different backing plate thickness after brazing
FIG. 5 is a schematic view of a wide plate structure of a shim plate for heat exchange between two media and on an extension plane of the periphery of an angular hole
FIG. 6 is a schematic cross-sectional view of a product of the same sheet thickness and different shim plate thicknesses after brazing
FIG. 7 is a schematic view of a wide plate structure of a backing plate for heat exchange with three media and extending on a plane around the corner hole
FIG. 8 is a schematic view of a wide plate structure of a backing plate for heat exchange with multiple media and on an extension plane of the periphery of an angular hole
FIG. 9 is a schematic cross-sectional view of a heat exchanger plate with a sealing surface of an angular hole of one half plate spacing height raised and a shim plate
FIG. 10 is a schematic cross-sectional view of a heat exchanger plate with a sealing surface of a corner hole of raised full plate spacing height and a shim plate
The backing plate on the heat exchanger plate of FIG. 11 is a schematic view of a narrow strip structure
FIG. 12 is a schematic cross-sectional view of corner holes of the same plate thickness and the same plate pitch in the high-low plane and having a backing plate
The backing plate on the heat exchanger plate of FIG. 13 is a schematic view of a narrow longitudinal symmetrical structure
FIG. 14 is a schematic cross-sectional view of corner holes of the same sheet thickness and different sheet spacing in the high and low planes and having a backing plate
The shim plate on the heat exchanger plate of FIG. 15 is a schematic view of a narrow strip transverse symmetrical structure
Detailed Description
Further description will be made with reference to examples and drawings.
In all figures, the designations 1, 1a, 1b denote thick inner baffles; the designations 2, 2a, 2b, 2c, 2d, 2e, 2f, 2g, 2h, 2i, 2j, 2k, 2m, 2n, 2o, 2p, 2q, 2r, 2s, 2t all represent heat exchanger plates; the designations 3, 3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, 3j, 3k, 3m, 3n, 3o, 3p, 3q, 3r, 3s, 3t, 3u each denote a backing plate having a particular thickness and shape; the marks 4, 4a and 4b all represent thick outer baffles; the designations 5, 5a, 5b each denote a through hole in the shim plate 3, 3a, 3b, 3c, 3d, 3e, 3f, 3g, 3h, 3i, in particular in the shim plate 3d, 3h, 3i, which does not allow the heat exchange medium a and C, D, E to flow into the middle of the heat exchange plate; the marks 6, 6a and 6B respectively represent a flow guiding and supporting fin structure which is positioned on one side of the base plates 3, 3a, 3B, 3c, 3d, 3e, 3f, 3g, 3h and 3i, especially on one side of the base plates 3d, 3h and 3i and can enable the heat exchange medium B to flow into the middle part of the heat exchange plate; the designations 7, 7a, 7b, 7c, 7d, 7e each denote a heat exchanger device located in the middle of the heat exchanger plate.
FIG. 1 shows a cross section of a box-shaped stacked heat exchanger with a shim plate 3 of desired thickness h1, for example an aluminum box-shaped stacked heat exchanger, after assembly and compaction of the heat exchanger plates and before brazing; wherein s=0 indicates that the inclined surfaces of the assembled heat exchange plates 2 are tightly attached, the gap is equal to zero, and the parallel assembly of the heat exchange plates is tightly pressed mutually and stably; h represents the plate spacing value of each heat exchange plate after being assembled and compressed and before being brazed; wherein f represents an assembly gap between the backing plate 3 having a desired thickness h1 and the assembled and compacted heat exchanger plate 2 in a lateral direction; a represents an inclined plane angle, and the inclined plane angles a of the peripheries of the heat exchange plates are equal; t represents the thickness of the plate of the heat exchange plate 2 before brazing; the hypotenuse of the small black right triangle in the middle part of fig. 1 is in a vertical state in fig. 1, the numerical value of the hypotenuse is equal to t+h, the numerical value of the opposite side is equal to the thickness t of the plate before the inclined plane brazing of the heat exchange plate 2, and in order to indicate that the thickness t of the plate is the opposite side of the small black right triangle, the included angle between the opposite side t and a horizontal line is drawn to be equal to an inclined plane angle a on the right side of fig. 1. These three values conform to the sine trigonometric function formula sina= [ t/(h+t) ]=opposite side/oblique side. The adjacent sides of the small black right triangle are inclined planes of the periphery of the heat exchange plate 2.
FIG. 2 is a schematic cross-sectional view of an aluminum box-shaped laminated heat exchanger, for example, in which brazing filler metal rolled on both sides of a core plate base material is melted and distributed due to high temperature during aluminum vacuum brazing; wherein t1 represents that at a moment when the brazing filler metal has been melted and spread, the thickness of each heat exchange plate 2a has been thinned to t1, and a gap S1 is generated between the inclined surfaces at the periphery of the heat exchange plate 2a, and S2 represents the distance of this gap S1 in the longitudinal vertical direction; f1 represents a lateral horizontal gap between each heat exchange plate 2a which has been thinned above the backing plate 3 having the desired thickness h1 at a certain instant of solder melt flow, resulting in the value of f1 in fig. 2 being greater than the value of f in fig. 1 due to solder melt flow; h2 represents the plate spacing horizontally existing between the heat exchange plates 2a after the solder melting and distribution at a moment, and the h2 value in fig. 2 is larger than the h value in fig. 1 due to the solder melting and distribution. Of course, the value of the ideal shim plate thickness h1 in fig. 2 is the same as the value of the ideal shim plate thickness h1 in fig. 1, and no change occurs.
Figure 2 shows only one moment of the continuous process, the solder is melted and spread continuously at high temperature, and the degree of solder melting and spreading is different in each moment. This results in the values of S1, S2, t1, f1, h2 varying continuously at each instant. In the actual brazing process, obvious S1 and S2 phenomena are not generated, and obvious f1 and h2 numerical values are not generated as shown in FIG. 2. Since in fig. 2 the heat exchanger plates 2a and the backing plate 3 with the desired thickness will sink under gravity as the solder melts and spreads, in the actual brazing process S1, S2 will almost always be 0, f1 and h2 will also be smaller and smaller until f1 will be 0 and h2 will be h1, the values of the plate thickness t and the plate spacing h will also be smaller and smaller, so that fig. 2 is only presented for convenience of description, showing a schematic view of an imaginary instant section where high temperature causes the solder to melt and spread.
FIG. 3 shows a cross-sectional view of a box-shaped stacked heat exchanger with a shim plate 3 of desired thickness h1 after brazing cooling; where s1=s2=f1=0 indicates that the product is not present in any of these gaps after brazing by the backing plate 3 having the desired thickness h1, it is also indicated that the instantaneous f1 value shown in fig. 2 is equal to the S2 value, and that the desired thickness h1 value of the backing plate 3 in fig. 3 is the actual plate spacing value after brazing of the product. However, the value of the post-braze plate spacing h1 in FIG. 3 is smaller than the value of the plate spacing h before brazing shown in FIG. 1.
Fig. 3 shows that in a single box-shaped stacked heat exchanger, the ideal thickness h1 of the backing plate 3 on each heat exchange plate 2b is that after the box-shaped stacked heat exchanger is brazed, the peripheral inclined surfaces of the heat exchange plates 2b are mutually sealed and brazed together, and meanwhile, the backing plate 3 on the heat exchange plates 2b is closely attached to the plane of the upper heat exchange plate 2b and the plane of the lower heat exchange plate 2b and mutually sealed and brazed together.
T2 in fig. 3 represents the final thickness of the sheet material of the heat exchange plate 2b after brazing, t2 being absolutely smaller than the value of t in fig. 1 due to the molten flux distribution of the brazing filler metal; the hypotenuse of the small black right triangle in the middle of fig. 3 is in a vertical state in the figure, the numerical value of the hypotenuse is equal to t2+h1, the numerical value of the opposite side is equal to the actual thickness t2 of the heat exchange plate 2b after the slant brazing, and in order to indicate that the thickness t2 of the plate is the opposite side of the small black right triangle, the right side of fig. 3 is drawn to have the included angle between the opposite side t2 and the horizontal line equal to the slant angle a. Since the bevel angle a is unchanged, the three values conform to the sine trigonometric function formula sin a= [ t 2/(t2+h1) ]=opposite side/oblique side, and the adjacent side is the bevel of the periphery of the heat exchange plate 2b.
As shown in fig. 1,2 and 3, if the thickness h1 of the backing plate 3 is too high, the f1 value in fig. 2 is considered to be smaller than the S2 value, and since the backing plate thickness h1 is not thinned in the brazing temperature, when the heat exchange plates and the backing plate are finally abutted against each other and the inclined surfaces are not abutted against each other, gaps may still exist between the inclined surfaces of the heat exchange plate 2b after brazing, that is, when f1=0, S1 and S2 are larger than 0, if the S1 gap is larger than the filling property of the brazing filler metal, the airtight leakage of the product after brazing can occur at the inclined surfaces.
If the thickness h1 of the pad 3 is too low, it is considered that f1 in fig. 2 is greater than S2, there may be no gap between the inclined surfaces of the heat exchange plate 2b after brazing, and s1=s2=0, but there may still be a gap between the pad 3 and the lateral bottom plane of the heat exchange plate 2b, that is, f1 is greater than 0. If the f1 gap is larger than the filling property of the brazing filler metal, the gap can cause the product to leak in each corner hole after brazing, and even the whole product can be skewed and deformed under the high-temperature brazing effect.
Although specific values t2 and h1 of opposite and adjacent sides in the sinusoidal trigonometric function are shown in fig. 3 as not equal to t and h in fig. 1, the calculated values in brackets in each are equal [ t 2/(t2+h1) ]= [ t/(t+h) ]. The value of the bevel angle a in fig. 3 is the same as the bevel angle a shown in fig. 1 and 2.
Fig. 1,2 and 3 show the process of the box-shaped laminated heat exchanger after the heat exchange plates are assembled and pressed, and the process is described after the heat exchange plates are not brazed, and the brazing is finished. It was found that the bevel angle a did not significantly deform or change during the brazing process, mainly because: the heat exchanger plates 2, 2a, 2b during the brazing process are only allowed to sink vertically downward by gravity, and no lateral force is generated to deform the inclined surfaces, which can be confirmed from the gaps S1, S2 generated between the inclined surfaces due to the melted flow distribution of the brazing filler metal shown in fig. 2.
Fig. 4 shows a schematic cross-sectional view of the different plate thicknesses and the different ideal shim plate thicknesses 3a, 3b, 3c after brazing, since the plate thicknesses of the heat exchanger plates 2c, 2d, 2e in fig. 4 are all different, the ideal thicknesses of the shim plates 3a, 3b, 3c are of course also different, but the bevel angles between the heat exchanger plates 2c, 2d, 2e are the same. Fig. 4 shows that the actual ideal thickness of each shim plate 3a, 3b, 3c after brazing is smaller than the plate spacing before brazing. The actual desired thickness of a certain shim plate 3a, 3b, 3c should also be related to the rolled solder thickness that the different plate thicknesses of the different heat exchanger plates 2c, 2d, 2e have, and to the variations in the thickness of the heat exchanger plates that may be caused by melting the solder on the heat exchanger plates 2c, 2d, 2e at the high brazing temperature.
Fig. 6 shows a schematic cross-sectional view of heat exchanger plates 2g, 2h of the same plate thickness and shim plates 3f, 3g of different shim plate thickness after product brazing. In fig. 6, the thickness of the plate material and the bevel angles of the heat exchange plates 2g and 2h are the same, but the peripheral bevel of the heat exchange plate 2g is formed by two layers of bevel surfaces with the same bevel angle and staggered with each other, and the peripheral bevel of the heat exchange plate 2h is formed by a single layer of bevel surfaces with the same bevel angle, so that the backing plates 3f and 3g can have different thicknesses, namely different plate pitches after brazing. But the different thicknesses exhibited by the shim plates 3f, 3g in fig. 6 and the different plate spacings exhibited are still smaller than the respective plate spacings exhibited and corresponding by the product after the respective heat exchanger plates 2g, 2h are assembled and compressed and before brazing.
Fig. 5, 7 and 8 each show that the shim plates 3d, 3h and 3i on the peripheral extension planes of the corner holes have a wide flat plate structure at one end of the heat exchange plates 2f, 2i and 2 j. The through holes 5, 5a and 5b for the heat exchange medium A are arranged in the backing plates 3d, 3h and 3i, and the peripheral inclined planes of the heat exchange plates 2f, 2i and 2j are mutually sealed and brazed together through filling of brazing filler metal after the backing plates 3d, 3h and 3i with ideal thickness are brazed together, and the backing plates 3d, 3h and 3i on the heat exchange plates 2f, 2i and 2j are closely attached to the upper heat exchange plates and the lower heat exchange plates through filling of brazing filler metal so that the heat exchange medium A flowing through the through holes 5, 5a and 5b of the backing plates can not flow into the heat exchange devices 7, 7a and 7b in the middle parts of the heat exchange plates 2f, 2i and 2 j. And on one side of the backing plates 3d, 3h, 3i there is a flow guiding and supporting fin structure 6, 6a, 6B which allows the heat exchange medium B to flow into the heat exchange means 7, 7a, 7B.
In fig. 7 and 8, and in fig. 5, the heat exchanger 7, 7a, 7b may or may not be provided with a pad 3e disposed in a narrow strip configuration on both lateral sides thereof. The thickness of the pad 3e is the same as the thickness of the pads 3a, 3b, 3c, 3d, 3f, 3g, 3h, 3i placed in the corner hole peripheral plane space, respectively.
The symbol C in a certain corner hole in fig. 7 indicates that the pad plate 3h is provided with a through hole for flowing the third heat exchange medium C, and after brazing, the peripheral inclined surfaces of the heat exchange plates 2f, 2i and 2j are mutually sealed and brazed together through filling of brazing filler metal, and meanwhile, the pad plate 3h on the heat exchange plate 2i is closely attached to the upper and lower heat exchange plates through filling of brazing filler metal and mutually sealed and brazed together, so that the heat exchange medium C flowing through the through hole of the pad plate cannot cross cavities or flow into the heat exchange device 7a in the middle of the heat exchange plate 2 i.
The symbol D, F in a certain corner hole in fig. 8 indicates that through holes through which various heat exchange media D, F flow are formed in the backing plate 3i, and the backing plate 3i with a desired thickness is closely attached to the upper and lower heat exchange plates after brazing, so that the various heat exchange media D, F flowing through the through holes of the backing plate 3i cannot cross cavities with each other or flow into the heat exchange device 7b in the middle of the heat exchange plate 2 j.
The backing plates 3, 3a, 3b, 3c, 3d, 3f, 3g, 3h, 3i in fig. 1,2, 3, 4, 5, 6, 7, 8 can be considered as wide flat plate structures (3 e is a narrow strip structure), and have ideal thickness and are closely brazed with the upper and lower heat exchange plates, so that the corner holes 5, 5a, 5b included in the backing plates can naturally flow, and the brazing sealing effect is achieved on the heat exchange medium A, C, D, E.
Fig. 9 and 10 are cross-sectional views of fig. 11, showing cross-sectional views of heat exchanger plates 2k, 2m, 2n with angular hole sealing surfaces of raised half plate pitch height, or raised full plate pitch height, and backing plates 3j, 3k, 3m, 3n of desired thickness and in a narrow strip configuration. The actual thickness of these shim plates 3j, 3k, 3m, 3n is also smaller than the plate spacing before brazing of the product.
In fig. 11, on the heat exchange plate 2o, the corner hole periphery is placed with the integral oblique fins and the backing plate 3k in a narrow strip structure, showing that the box-shaped laminated heat exchanger of this structural form has a lighter weight and lower manufacturing cost due to the smaller backing plate area.
The shim plates 3j, 3k, 3m, in particular 3n, in the configuration of strips in figures 9, 10, 11, can be placed anywhere in the peripheral inclined plane of the heat exchanger plates 2k, 2m, 2n, 2o, including along a circle in the inclined plane. However, such a shim plate structure does not have the function of sealing the corner holes and can only be used for preventing the products from being distorted at high brazing temperatures.
Fig. 12, 13 show heat exchanger plates 2p, 2q of the same plate thickness and with the same plate spacing, but the corner holes in each heat exchanger plate are located in the high and low planes, respectively, and have backing plates 3o, 3p, 3q, 3r of the desired thickness. The backing plates 3o, 3p, 3q and 3r in fig. 12 and 13 are each in a narrow symmetrical structure, and at two ends of the heat exchange plate of the product, the plate spacing in the peripheral space of the corner hole is the sum of two adjacent plate spacings, while the backing plates 3o, 3p and 3q with ideal thickness are actually set to be smaller than the sum of the adjacent plate spacings before brazing of the product. However, the thickness of the backing plate 3r is different from the thickness of the corner hole peripheral backing plates 3o, 3p, 3q, and the thickness of the backing plates 3r on both lateral sides of the corrugated heat exchange device 7d is smaller than the value of the single plate spacing before brazing the product.
Fig. 14, 15 show heat exchanger plates 2r, 2s, 2t of the same plate thickness and with different plate pitches, but the corner holes in each heat exchanger plate are located in the high and low planes, respectively, and have backing plates 3s, 3t, 3u of the desired thickness. The shim plates 3s, 3t, 3u in fig. 14 and 15 are each in a narrow symmetrical structure, and at both ends of the heat exchange plate of the product, the plate spacing in the peripheral space of the corner hole is the sum of the adjacent two plate spacings, and the shim plates 3s, 3t, 3u with ideal thickness are actually set to be smaller than the sum of the adjacent plate spacings before brazing of the product.
The fact that the shim plate is in the shape of a narrow arc on the right side in fig. 13, 15 is shown by a broken line, indicates that the shim plate is located on the back side of the heat exchanger plates 2q, 2 t. The pad in the form of a narrow arc on the left is shown by a solid line, which pad is located on the front side of the heat exchanger plates 2q, 2 t.
The backing plates 3j, 3k, 3m, 3n, 3o, 3p, 3q, 3r, 3s, 3t, 3u in the narrow strip structure in fig. 9, 10, 11, 12, 13, 14, 15 do not have a sealing effect, but only have an effect of ensuring that the product does not skew or deform during brazing.
Fig. 1 to 15 show various possible box-stack heat exchangers in different configurations, mainly for illustrating a plate spacing smaller than that between heat exchanger plates before brazing, and a backing plate structure with a specific thickness h1 may be applied to various box-stack heat exchangers, including various box-stack heat exchanger configurations not yet shown in the figures.
Claims (5)
1. The box-shaped laminated heat exchanger with special backing plate thickness is formed by sequentially and horizontally laminating a plurality of box-shaped heat exchange plates with inclined planes at the periphery, and because in a single box-shaped laminated heat exchanger, the inclined plane angle a of the inclined planes at the periphery of each heat exchange plate is the same, after the heat exchange plates are horizontally laminated, assembled and pressed and the inclined planes at the periphery are mutually stuck and stabilized, a certain number of plate spacing h is parallel between each heat exchange plate, and therefore, the inclined plane angle a of the inclined planes at the periphery of each heat exchange plate is related to the material thickness t of the heat exchange plate and the plate spacing h which exists in parallel, and the relation of the three numbers is a sine trigonometric function: sin a= [ t/(h+t) ], in the box-shaped laminated heat exchanger, in each parallel plate interval layer, there are heat exchange devices capable of performing dividing wall heat exchange and corner holes for heat exchange medium to circulate, the heat exchange devices are positioned in the middle of each heat exchange plate, the corner holes are distributed at two ends of each heat exchange plate, and each heat exchange plate is provided with a backing plate, and the heat exchange plate is characterized in that brazing filler metal is rolled on the front side and the back side of the core plate base material;
in a single box-shaped laminated heat exchanger, the actual thickness of a backing plate on each heat exchange plate is smaller than the value of the plate spacing h in the sine trigonometric function calculation formula sin a= [ t/(h+t) ] formed after each heat exchange plate in the box-shaped laminated heat exchanger is assembled and compressed and before brazing;
In a single box-shaped laminated heat exchanger, after brazing, the actual thickness of a backing plate on each heat exchange plate is such that the peripheral inclined planes of the heat exchange plates are mutually sealed and brazed together through filling of brazing filler metal, and meanwhile, the backing plate on each heat exchange plate is also closely attached to the upper and lower heat exchange plates through filling of brazing filler metal and mutually sealed and brazed together;
in a single box-shaped stacked heat exchanger, the positions of the backing plates are symmetrical and identical on each heat exchange plate.
2. The heat exchanger according to claim 1, wherein in the single box-shaped stacked heat exchanger, in the space formed by the corner holes and the peripheral extension planes at both ends of the heat exchange plates, a backing plate of a wide plate structure and having the thickness is added layer by layer, in which a through hole for circulating the heat exchange medium a is formed, and since the peripheral inclined surfaces of the heat exchange plates are sealed and brazed to each other by brazing filler metal filling, the backing plate on the heat exchange plates and the upper and lower heat exchange plates are also sealed and brazed to each other by brazing filler metal filling and close fitting to each other, so that the heat exchange medium a flowing through the through hole of the backing plate does not flow into the heat exchange device in the middle of the heat exchange plates.
3. A heat exchanger according to claim 1, characterized in that in a single box-shaped stacked heat exchanger, on each heat exchanger plate, in the space formed by the angular holes and the peripheral extension plane at both ends of the heat exchanger plate, a backing plate of wide plate construction and having the above-mentioned thickness is added layer by layer, in which not only the through-hole construction for the flow of heat exchange medium a is present, but also the construction for the flow of heat exchange medium B into the heat exchanger device is present on one side of the backing plate.
4. A heat exchanger according to claim 1, wherein in a single box-shaped stacked heat exchanger, the shim plate is of a narrow strip construction on each heat exchanger plate.
5. A heat exchanger according to claim 1, characterized in that in a single box-shaped stacked heat exchanger, on each heat exchanger plate, the shim plate is placed in the space formed by the angular holes and the peripheral extension plane at both ends of the heat exchanger plate, or in any suitable position on the heat exchanger plate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910115084.6A CN109696073B (en) | 2019-02-14 | 2019-02-14 | Box-type laminated heat exchanger with special backing plate thickness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910115084.6A CN109696073B (en) | 2019-02-14 | 2019-02-14 | Box-type laminated heat exchanger with special backing plate thickness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109696073A CN109696073A (en) | 2019-04-30 |
| CN109696073B true CN109696073B (en) | 2024-05-24 |
Family
ID=66233351
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910115084.6A Active CN109696073B (en) | 2019-02-14 | 2019-02-14 | Box-type laminated heat exchanger with special backing plate thickness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109696073B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6705482A (en) * | 1966-04-20 | 1967-10-23 | ||
| CN103292623A (en) * | 2012-02-07 | 2013-09-11 | 丹福斯有限公司 | Heat exchanger |
| CN103486887A (en) * | 2013-09-25 | 2014-01-01 | 缪志先 | Box-shaped laminated heat exchanger with comb-shaped base plate |
| CN203629381U (en) * | 2013-09-25 | 2014-06-04 | 缪志先 | Box-shaped laminated heat exchanger with identical plate material thickness and different plate distance runner heights |
| CN106482556A (en) * | 2016-12-19 | 2017-03-08 | 刘启春 | A kind of box-like having fin between corner apertures and heat-exchanger rig is laminated heat exchanger |
| CN211205018U (en) * | 2019-02-14 | 2020-08-07 | 刘启春 | Box-shaped laminated heat exchanger |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100581843B1 (en) * | 2005-05-09 | 2006-05-22 | 대원열판(주) | Structure for combining heat plate with gasket of a plate type heat exchanger |
-
2019
- 2019-02-14 CN CN201910115084.6A patent/CN109696073B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| NL6705482A (en) * | 1966-04-20 | 1967-10-23 | ||
| CN103292623A (en) * | 2012-02-07 | 2013-09-11 | 丹福斯有限公司 | Heat exchanger |
| CN103486887A (en) * | 2013-09-25 | 2014-01-01 | 缪志先 | Box-shaped laminated heat exchanger with comb-shaped base plate |
| CN203629381U (en) * | 2013-09-25 | 2014-06-04 | 缪志先 | Box-shaped laminated heat exchanger with identical plate material thickness and different plate distance runner heights |
| CN106482556A (en) * | 2016-12-19 | 2017-03-08 | 刘启春 | A kind of box-like having fin between corner apertures and heat-exchanger rig is laminated heat exchanger |
| CN211205018U (en) * | 2019-02-14 | 2020-08-07 | 刘启春 | Box-shaped laminated heat exchanger |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109696073A (en) | 2019-04-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP6198425B2 (en) | Plate type heat exchanger | |
| EP3062949B2 (en) | A method of brazing a plate heat exchanger using scren printed brazing material | |
| EP2455695B1 (en) | Heat exchanger | |
| EP2455694A2 (en) | Heat exchanger | |
| EP2172728A1 (en) | A plate-fin type heat exchanger without sealing strip | |
| US20160273842A1 (en) | Heat exchangers with plates having surface patterns for enhancing flatness and methods for manufacturing same | |
| JP2013528780A (en) | Plate heat exchanger and method for manufacturing plate heat exchanger | |
| US10465991B2 (en) | Plate heat exchanger and method for manufacturing a plate heat exchanger | |
| JP2010256006A (en) | Sectional plate type heat exchanger | |
| US7219719B2 (en) | Fin for a plate heat exchanger, methods for the manufacture of such a fin, and a heat exchanger comprising such a fin | |
| EP2202476B1 (en) | Method of manufacturing a welded plate heat exchanger | |
| EP2604962B1 (en) | Plate heat exchanger and method for manufacturing a plate heat exchanger | |
| CN211205018U (en) | Box-shaped laminated heat exchanger | |
| CN109696073B (en) | Box-type laminated heat exchanger with special backing plate thickness | |
| CN211346457U (en) | Plate-fin heat exchanger core structure | |
| CN102095328A (en) | M-type corrugated-plate heat exchanger plate bundle with positioning control point | |
| CN209588799U (en) | There is the box-like stacking heat exchanger of support fin in periphery of angled hole plane space | |
| CN201621983U (en) | Plate type heat exchanger | |
| CN210952454U (en) | Wide-channel self-locking supporting heat exchange core and slurry heat exchanger | |
| KR20190046674A (en) | Method and apparatus for producing a brazed plate heat exchanger block by sectional brazing | |
| CN101832726B (en) | Heat radiating pipe for heat exchanger and manufacturing method thereof | |
| US20190247942A1 (en) | Method for producing a plate heat exchanger block with targeted application of the solder material to fins and sidebars in particular | |
| TWI640741B (en) | Titanium plate heat exchanger and the method of producing the same | |
| CN211346458U (en) | Plate-fin heat exchanger core | |
| CN209857722U (en) | Short seal strip for plate-fin radiator |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20200730 Address after: 100027 Beijing City, Chaoyang District Xinyuan Ricci on the third floor two unit 15 Applicant after: Miao Zhixian Address before: 100027 Beijing City, Chaoyang District Xinyuan Ricci on the third floor two unit 15 Applicant before: Liu Qichun |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |