CN207299550U - A kind of cooling wall of the heat exchanger of condenser boiler - Google Patents

A kind of cooling wall of the heat exchanger of condenser boiler Download PDF

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Publication number
CN207299550U
CN207299550U CN201720888186.8U CN201720888186U CN207299550U CN 207299550 U CN207299550 U CN 207299550U CN 201720888186 U CN201720888186 U CN 201720888186U CN 207299550 U CN207299550 U CN 207299550U
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China
Prior art keywords
cooling wall
pipe
metal material
profile
heat exchanger
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CN201720888186.8U
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Chinese (zh)
Inventor
R·豪力曼斯
F·迈尔里尼
F·佩迪卡洛里
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Yi Ke Co Ltd
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Yi Ke Co Ltd
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
    • F28D21/0005—Recuperative heat exchangers the heat being recuperated from exhaust gases for domestic or space-heating systems
    • F28D21/0007—Water heaters
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
    • F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
    • F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/06—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with the heat-exchange conduits forming part of, or being attached to, the tank containing the body of fluid
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F7/00—Elements not covered by group F28F1/00, F28F3/00 or F28F5/00
    • F28F7/02—Blocks traversed by passages for heat-exchange media
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H8/00—Fluid heaters characterised by means for extracting latent heat from flue gases by means of condensation
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/0408—Multi-circuit heat exchangers, e.g. integrating different heat exchange sections in the same unit or heat exchangers for more than two fluids
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • F28D1/053—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits the conduits being straight
    • F28D1/05316—Assemblies of conduits connected to common headers, e.g. core type radiators
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/10—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes made by hydroforming
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
    • F28F2255/16—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes extruded
    • 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
    • F28F2275/12—Fastening; Joining by methods involving deformation of the elements
    • F28F2275/125—Fastening; Joining by methods involving deformation of the elements by bringing elements together and expanding
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]

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

Abstract

The purpose of this utility model is to provide a kind of cooling wall (1) of heat exchanger of condenser boiler, its internal structure includes being used for the multiple first horizontal cavitys (1.1) for accommodating stainless steel tube (2).Pass through the high pressure hydroforming process on about 1000 bars of the order of magnitude, there is continuous contact between the pipe (2) and the first horizontal cavity (1.1), so that the cooling wall (1) and the heat exchanger effectiveness of the combustion product gases of boiler significantly improve.

Description

A kind of cooling wall of the heat exchanger of condenser boiler
Technical field
The theme of the utility model is the cooling wall of a part for the receiving surface to form condenser boiler.
Specifically, the boundary wall of the heat exchanger in the cooling system of central heating boiler is the utility model is related to, it is suitable It is used for the hot water of environment heating and hygienic purpose for producing.
Background technology
The component of this boiler and operation are well known to those skilled in the art, it is not necessary to are retouched in detail State.However, it is useful to remember, in the case of condenser boiler, how is the temperature that the flue gas that is produced by burning is reached It is relatively low, and the amount of condensed steam how bigger, so as to cause the thermal efficiency of boiler to increase.Therefore, for these flue gases Suitable cooling system is necessary for obtaining high yield in such heater.
In Figure 1A and Figure 1B be a part for burner/heat exchanger unit for condensation gas boiler Know the example of technology, it includes：
- box housing, its by by rear wall and the two side walls 1 ' that antetheca (not shown) connects by crossbeam 1.2 ' and Suitable clamp device limits；
- particularly premix burner 3, it passes through 3.1 water cooling of fin pipe；
A series of-pipes 4, wherein, water is used for environment and heats and/or sanitary use.
The exchanger part is usually supplemented by additional down-set portion, which includes two groups of water pipes, with totality It is upper to limit the stainless steel heat exchanger with triode, (fan of 3 upstream of burner not shown in the figure is conveyed towards lower curtate, And be also not shown chimney connection in be extracted to behind) combustion product gases must be cooled in triode Below dew point, to obtain condensate, and a certain amount of latent heat is recycled.
On the outer surface of (usually being obtained by the extrusion of the aluminium alloy) side wall 1 ', pipe 2 ' in addition passes through such as The known bonding mode of transverse joint 1.0 ' etc is fixed.
The pipe 2 ' has the function of cooling side wall 1 ', i.e., pipe 2 ' serves as the heat exchanger for combustion product gases, and blocks Otherwise the heat that will be dissipated by these side walls 1 '.
Above-mentioned heat exchanger allows for the energy-efficient of condenser boiler, but due to the peace between both parts Heat transfer caused by die-filling formula is unsatisfactory, so be at the connecting portion particularly between the outer surface of side wall 1 ' and pipe 2 ' Now with some the relevant critical points of its architectural characteristic.
Utility model content
The purpose of this utility model is to overcome these to lack by providing a kind of cooling wall arranged equipped with specific structure Point so that its in terms of heat exchange more efficiently.
Another purpose of the utility model is to propose the cooling wall with physics and mechanical property, its physics and machinery are special Property makes its lighter, but makes it have enough rigidities of structure at the same time.
Preferred embodiment according to the present utility model, there is provided a kind of cooling wall (1) of heat exchanger of condenser boiler, Including：
Profile, the profile are obtained by the extrusion of the first metal material (M1)；
Multiple pipes (2), the multiple pipe is associated with the profile, the multiple pipe (2) by with first metal material Different the second metal material (M2) of material (M1) is made；
It is characterized in that：
The cooling wall is included in the multiple first horizontal cavitys (1.1) in the internal structure of the profile, each Horizontal cavity is suitable for accommodating a pipe (2) in the multiple pipe (2)；
After high pressure hydroforming process, each pipe (2) in the multiple pipe (2) is clamped and with the multiple the The each first horizontal cavity (1.1) in one horizontal cavity (1.1) continuously contacts；
Second metal material (M2) of the multiple pipe (2) has：
Elastic modulus E 2, the elastic modulus E 2 are more than the elasticity modulus of first metal material (M1) of the profile E1；And
Elastic limit εe2, elastic limit εe2Less than the elastic limit of first metal material (M1) of the profile εe1。
Another preferred embodiment according to the present utility model, first metal material (M1) of the profile is that aluminium closes Gold.
Another preferred embodiment according to the present utility model, first metal material (M1) of the profile is that aluminium closes Golden Al6063-T66.
Another preferred embodiment according to the present utility model, second metal material (M2) of the multiple pipe (2) are Stainless steel.
Another preferred embodiment according to the present utility model, second metal material (M2) of the multiple pipe (2) are Stainless steel AISI 316L.
Another preferred embodiment according to the present utility model, the cooling wall are included towards the inside of the heat exchanger Fin or protuberance (1.4), the fin or protuberance serve as the supporting member of the pipe (2) of the heat exchanger.
Another preferred embodiment according to the present utility model, the inside of the metal part of the cooling wall (1) Structure further includes at least one second horizontal cavity (1.3) for potentially acting as the air gap.
Another preferred embodiment according to the present utility model, the multiple pipe (2) and the multiple first horizontal cavity (1.1) there is cylindrical cross-section.
By cooling wall according to the present utility model so that the heat exchanger effectiveness of the combustion product gases of cooling wall and boiler is notable Improve.
Brief description of the drawings
The other feature of the utility model will preferably be shown by the description below to the preferred embodiment of the utility model Go out, and be shown in the drawings by way of non-limiting example, in attached drawing：
Figure 1A shows the one of burner/heat exchanger unit of condenser boiler according to prior art as described above Part；
Figure 1B is the amplification detail view of the part of Figure 1A；
Fig. 2 shows burner/heat exchanger assemblies with cooling wall according to the present utility model；
Fig. 3 shows a part for cooling wall according to the present utility model；
Fig. 4 shows the possible size for the pipe for being arranged at cooling wall according to the present utility model；
Fig. 5 shows pipe inside the cooling wall according to the present utility model of the size according to Fig. 4 in hydraulic pressure It is integrated after forming process；
Fig. 6 is cooling wall according to the present utility model and the exemplary curve of the elastic plastic behavior of pipe that is integrated in Figure.
Embodiment
Referring now to the feature of the utility model is described in attached drawing, for embodiment therein, its constructional details is not There is constraint to the purpose of this utility model.
(" under ", " on ", " interior ", " outer ", "front", "rear" etc.) refers to it should be appreciated that any size and spatial terminology It is some position that the component of the utility model represents in the accompanying drawings, intention is not limited to possible operating condition.
Fig. 2 shows burner/heat exchanger unit of the condensation gas boiler limited by box housing, the side of box housing Face for the cooling wall 1 of the purpose of this utility model by representing.
The cooling wall 1 is attached to rear wall and antetheca by multiple crossbeams 1.2 and attachment arrangement (not shown in attached drawing).
(being similar to what is seen in the non-limiting example of Figure 1A) can be seen from the prior art, in the box enclosure interior Be provided with 3.1 water cooling of fin pipe premix burner 3 and it is a series of be arranged to multilayer stainless steel (be preferably AISI 316L, highly corrosion resistant is provided with acid ingredient in the condensate for combustion product gases) pipe 4.
A series of pipes 4 that continuous flowing and return path are formed with the major loop of equipment and/or secondary loop are logical The connection manifold crossed on antetheca and rear wall is attached (not shown in attached drawing).
In the exemplary embodiment of attached drawing, these pipes 4 are arranged on three horizontal positions, and according to the burning of decline The crossflow principle of flue gas transports water bottom-up, until delivering interface：However, according to the size of boiler or desired energy Amount efficiency, a series of pipes 4 are it is of course possible to being different quantity.
Excellent corrosion resistance and good structural strength due to the machining characteristics of aluminium alloy, to combustion product gases, it is cold But the metallic profiles of wall 1 by extruding aluminium alloy, be preferably that aluminium Al6063-T66 is manufactured.
Preferred embodiment shown in reference to the accompanying drawings, the cooling wall 1 have fin or protuberance 1.4, fin or protrusion Portion 1.4 is towards the inside of heat exchanger, so that as (being otherwise fixed to the cooling wall 1 by standard fasteners) one The supporting member of serial pipe 4.
Different from the side wall 1 ' of known technology, the cooling wall 1 of the utility model is basically constructed as complete metal profile And there is no internal cavity, and the preferred embodiment of cooling wall 1 has an internal structure, which includes multiple cylindrical the One horizontal cavity 1.1, is alternatively alternately arranged with the horizontal cavity 1.3 of rectangle second.
The horizontal cavity 1.1 of these cylinders first accommodates the water pipe 2 in embedded cooling wall 1 with the pattern of Short Description, and The horizontal cavity 1.3 of rectangle second defines the cavity for performing dual-use function, is to confer to the lighting of 1 bigger of cooling wall respectively, and The rigidity of structure is not lost, and serves in particular as thermal insulation areas.
The water pipe 2 with material substantially identical with pipe 4, i.e. stainless steel (being preferably AISI 316L) is drawn Enter into the described cylindrical first horizontal cavity 1.1 of the cooling wall 1 of aluminium alloy (being preferably Al6063-T66), and be subjected to The operation of high pressure hydroforming, so as to produce the continuous contact between two kinds of different materials according to short-term elastic-plastic deformation rule.
At the end of hydroforming step under about 1000 bars or so of high pressure, it will be in close contact between two kinds of materials, this It will cause steel pipe 2 and the continuous and uniform bonding (engagement) between the horizontal cavity 1.1 of cylinder first of aluminium cooling wall 1, It is derived from the pipe 2 to be firmly attached in cooling wall 1, and ultimately results in the cooling effectiveness raising to combustion product gases.
It is shown schematically in the curve map of Fig. 6 after deformation caused by the mechanism of hydroforming by above-mentioned two The behavior of kind material.
It is known that for elastic material, meet relation σ=ε E, wherein：
E is the elasticity modulus (also referred to as " Young's modulus ") of material；
ε is the relative deformation (" strain (strain) " in English) for being subject to the material of some mechanically deforms to be subjected to；
σ be after relative deformation ε a stress as caused by material or tension force (in English " stress (should Power) ")；
ε is equal to Δ L/L again, wherein, Δ L is the absolute deformation of material, and L is the part that material has been subjected to deformation Δ L Linear dimension.
Cause the mechanism of absolute deformation Δ L by eliminating, if corresponding relative deformation ε keeps below elastic limit Value εe(exceeding it, there are the plastic deformation of material), then the relative deformation ε is cancelled, and material returns to original dimension； Otherwise, that is to say, that if mechanism exceedes elastic limit value εe, then material retain residual deformation εr, residual deformation εrSubstantially It is upper to be equal to relative to elastic limit εeRelative deformation it is excessive (i.e.：εr=ε-εe)。
After relative deformation ε, even if deformation epsilon exceedes elastic limit εe, elasticity modulus also remains basically unchanged.
Show the curve map of the above (although providing rational number for two kinds of elastic materials M1 and M2 in figure 6 Word refers to, but it is intended merely as example), two kinds of elastic materials M1 and M2 are the aluminium alloy and pipe 2 of cooling wall 1 respectively Steel.
It may be noted that the elastic modulus E 2 of M2 materials is more than the elastic modulus E 1 of material M1, but elastic limit εe2Significantly less than εe1：Therefore, a relative deformation (strain) ε can cause the relative deformation ε in material M2r2, its caused by with M1 materials possibly even The ε being not presentr1It is dramatically different.
According to these characteristics of the material discussed, it is therefore possible to by forcing the pipe 2 to be resisted against the cylinder Hydroforming on first horizontal cavity 1.1 and steel pipe 2 (material M2) is fastened on to the cylinder first of aluminium cooling wall 1 (material M1) The horizontal inner side of cavity 1.1, while the horizontal cavity 1.1 of cylinder first does not suffer from being plastically deformed or undergoes the plasticity change of decrement Shape, to ensure after hydroforming, pipe 2 is flexibly fastened to the horizontal cavity 1.1 of cylinder first.
Once hydroforming pressure is released, two kinds of materials M1 and M2 result in residual deformation εr2And εr1, residual deformation εr2 And εr1Pass through the application of the tension force in the compression and M1 in residual stress σ, M2 of material M1 and M2.This point is although with non-essence True mode illustrates, but allows residual deformation ε in figure 6r2And εr1It is equal.
In other words, the strong internal pressure in the application hydroforming of the inner side of pipe 2 is passed through so that the internal pressure exceedes bullet Property limit εe2Value, and therefore run off into plastic range, pressure of the 2 stainless steel tube AISI 316L in the hydroforming Also afterflow ε will be kept after removingr2。
Meanwhile by removing the pressure load, the first horizontal cavity 1.1 of the cooling wall 1 of aluminium alloy Al6063-T66 The outer surface of the pipe 2 will flexibly be fastened, this is because the first horizontal cavity 1.1 will tend to return to original dimension (if First horizontal cavity 1.1 has been held in elastic range) or remain with afterflow εr1If (the first horizontal cavity 1.1 Intrude in plastic range), but afterflow εr1Than the ε of the pipe 2r2It is much smaller.
According to the size and magnitude of the deformation applied, the calculating to the agenda of these certain materials coupled exists The expert of construction science and machinery building can and scope in, and by well-known specific software and greatly judicial convenience.
Numeric reference given below and effective in the embodiment of Fig. 4 and Fig. 5, so that the implementation exemplified with the utility model A kind of form of example, but general goal of the invention is not limited.
In this case：
The M2 materials of pipe 2 are stainless steel AISI 316L, its Young's modulus is 207000MPa, and tensile yield strength is 215MPA；
The M1 materials of cooling wall 1 are aluminium alloy Al6063-T66, its Young's modulus is 69500MPa, and tensile yield strength For 205MPA；
The internal diameter of pipe 2 is 22mm, outside diameter 25mm；
The internal diameter for cooling down 1.1 profile of horizontal cavity of cylinder first of wall part 1 is 25mm；
Pipe 2 is hydroformed the final outside diameter for 27.6mm after hydroforming；
Required hydroforming pressure is about 1000 bars for this purpose.
By numerical computations, and by means of specific software, it is possible to determine, due to hydroforming, pipe 2 and cooling wall Contact between 1 is both greater than 0MPa in the whole length of pipe 2, so as to show always to have between the two elements continuous Contact：For precision, at the end of hydroforming process, in different contacts area, contact value in 2.5MPa extremely Between 23MPa.
Clearly as the thermal coefficient of expansion of aluminium Al6063-T66 is higher compared with the thermal coefficient of expansion of steel AISI 316L, this A little values reduce during the high temperature of boiler thermal cycle (and then to be recovered, while aluminium is by the direction permeated to steel when temperature declines On move again), still, the residual elasticity deformation Δ ε as caused by high pressure hydroforming processrTemperature will not be run anyway The thermal expansion in the range of degree is offset.
It has been determined that it also ensure that the company between two kinds of materials in boiler operatiopn under the normal operating temperature of thermal cycle Continuous contact, during this period, the contact between pipe 2 and cooling wall 1 can be reduced to the minimum value of 1.3MPa, so as to be maintained at More than 0, and ensure for whole contact area, discontinuity is not present between two kinds of materials.Therefore, during thermal cycle, lead to The improved heat transfer characteristic that the close contact crossed between pipe 2 and cooling wall 1 obtains will remain unchanged.
In from that discussed above, the utility model has the advantages that clearly, first advantage is related to by cooling wall 1 and boiler Combustion product gases heat-shift improved ability.
By the utility model compared with the side wall 1 ' of the prior art of Figure 1A, due to wherein being integrated by hydroforming There is pipe 2, software simulation and laboratory test have shown that heat exchanger effectiveness improves about 7%, this also results in about 26% relatively low energy Amount loss and much lower average outer medium temperature (extremely use root from about 170 DEG C in the case of the side wall 1 ' using known technology According to the utility model cooling wall 1 when about 95 DEG C).
These results have active influence to the overall performance of boiler, its can than with similarly configure but use known to The boiler of the side wall 1 ' of technology produces the caloric value of about 1.5kW more.
Second advantage is related to the design feature of cooling wall 1, relative to the side wall 1 ' for being provided with known technology burner/ The housing of heat exchanger assemblies, the advantage make 1 lighterization of cooling wall, but provide suitable rigidity to bear boiler thermal cycle Stress.In fact, according to the stress test of Mises' (Von Mises) criterion it has been shown that due to being provided with according to this Caused thermal dilation difference on the shell of the cooling wall 1 of utility model, the ability for resisting cyclic deformation add about 40%.
It is clear that to those skilled in the art, above-mentioned cooling wall 1 may have many modifications without departing from this reality With it is intrinsic in new design the characteristics of because it is clear that in the actual implementation of the utility model, above-mentioned various parts can be by Technically equivalent element replaces.
For example, the preferred embodiment shown in reference to the accompanying drawings, it has been mentioned that the horizontal cavity of cylinder first of cooling wall 1 1.1, to accommodate the pipe 2 with cylindrical cross-section, the combination for them by hydroforming, however, the high pressure liquid of sheet material Pressing formation is also applied for the not necessarily pipe 2 with circular cross-section and the horizontal cavity 1.1 of correlation first, (in the feelings of noncircular cross section Under condition) if desired, some parameters can be changed to ensure the continuous contact between two components.
Preferred embodiment according to the present utility model, similarly sees how the internal structure of cooling wall 1 is presented as heat Exclusion region and the multiple second horizontal cavitys 1.3 in lightweight gap.It will be appreciated, however, that this second horizontal cavity 1.3 can To be the shape in addition to the rectangle shown in figure, and for different quantity or can be completely absent (although in latter feelings Under condition, this can damage the heat exchanger effectiveness performance of the cooling wall 1).
Finally, it is to be noted that the material of the component of shown cooling wall 1 is only the non-of preferred embodiment in the description Limitative examples, and can be changed according to specific detailing requiments, without damaging elastoplastic property so that high pressure hydroforming Process high pressure allows pipe 2 to be integrated in the first horizontal inner side of cavity 1.1, thus, the elasticity modulus of the metal material M2 of the pipe 2 Elastic modulus Es 1 of the E2 more than the metal material M1 of the cooling wall 1, but the elastic limit ε of metal material M2e2Than this gold Belong to the elastic limit ε of material M1e1It is much smaller so that after hydroforming, pipe 2 is held against the horizontal cavity of cylinder first 1.1 flexibly fasten.

Claims (9)

1. a kind of cooling wall (1) of heat exchanger of condenser boiler, including：
Profile, the profile are obtained by the extrusion of the first metal material (M1),
Multiple pipes (2), the multiple pipe is associated with the profile, the multiple pipe (2) by with first metal material (M1) different the second metal materials (M2) is made,
It is characterized in that,
The cooling wall is included in the multiple first horizontal cavitys (1.1) in the internal structure of the profile, each transverse direction cavity Suitable for accommodating a pipe (2) in the multiple pipe (2),
After high pressure hydroforming process, each pipe (2) in the multiple pipe (2) it is clamped and with it is the multiple first horizontal The each first horizontal cavity (1.1) into cavity (1.1) continuously contacts,
Second metal material (M2) of the multiple pipe (2) has：
Elastic modulus E 2, the elastic modulus E 2 are more than the elastic modulus E 1 of first metal material (M1) of the profile, with And
Elastic limit εe2, elastic limit εe2Less than the elastic limit ε of first metal material (M1) of the profilee1。
2. cooling wall (1) according to claim 1, it is characterised in that
First metal material (M1) of the profile is aluminium alloy.
3. cooling wall (1) according to claim 1, it is characterised in that
First metal material (M1) of the profile is aluminium alloy Al6063-T66.
4. cooling wall (1) according to claim 2, it is characterised in that
First metal material (M1) of the profile is aluminium alloy Al6063-T66.
5. cooling wall (1) according to claim 1, it is characterised in that
Second metal material (M2) of the multiple pipe (2) is stainless steel.
6. the cooling wall (1) according to any one of claim 1-5, it is characterised in that
Second metal material (M2) of the multiple pipe (2) is stainless steel AISI 316L.
7. the cooling wall (1) according to any one of claim 1-5, it is characterised in that
The cooling wall includes the fin or protuberance (1.4) towards the inside of the heat exchanger, the fin or protuberance Serve as the supporting member of the pipe (4) of the heat exchanger.
8. the cooling wall (1) according to any one of preceding claims 1-5, it is characterised in that
The internal structure of the metal part of the cooling wall (1), which further includes, potentially acts as at least one the second of the air gap Horizontal cavity (1.3).
9. cooling wall (1) according to claim 1, it is characterised in that
The multiple pipe (2) and the multiple first horizontal cavity (1.1) have cylindrical cross-section.
CN201720888186.8U 2016-08-01 2017-07-20 A kind of cooling wall of the heat exchanger of condenser boiler Active CN207299550U (en)

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