CN209013818U - Heat exchanger and its connection structure and connector - Google Patents
Heat exchanger and its connection structure and connector Download PDFInfo
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- CN209013818U CN209013818U CN201821512267.9U CN201821512267U CN209013818U CN 209013818 U CN209013818 U CN 209013818U CN 201821512267 U CN201821512267 U CN 201821512267U CN 209013818 U CN209013818 U CN 209013818U
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Abstract
The utility model discloses a kind of heat exchanger and its connection structure and connector, the connection structure of the heat exchanger includes: connector, and the surface of the connector is formed with diffusion coating；Connecting tube, the connecting tube are inserted into the connector and are connected by solder with the joint brazing；Wherein, the corrosion potential of weld metal is formed by after the corrosion potential of the diffusion coating, the corrosion potential of the connector, the solder brazing and the corrosion potential of the connecting tube successively increases.Anti-corrosion effect is improved according to the connection structure of the heat exchanger of the utility model embodiment, reduces slip.
Description
Technical field
The utility model relates to technical field of heat exchange, in particular to a kind of connection structure of heat exchanger, with described
The heat exchanger of the connection structure of heat exchanger and connector for heat exchanger.
Background technique
Refrigeration, HVAC and air-conditioning system and heat exchanger in the related technology often uses connector and pipeline is attached, example
Such as copper element in aluminium joint, such connector generallys use solder cooperation fluoaluminic acid salt brazing flux and is brazed, but the connector is easy
There is corrosion leakage in the shorter time.
For anticorrosion, copper-aluminium joint outside usually requires package heat-shrinkable T bush, adhesive tape, clay or coating protective layer etc. and carries out
Corrosion protection.These additional process usually require row operation again after the advanced row polishing of docking head surface and cleaning, and technique is cumbersome, raw
Low efficiency is produced, also, because the residual brazing flux of joint surface is not easy thorough cleaning, the protecting effect of heat-shrink tube etc. can also give a discount
Button, still will appear the corrosion leakage of part copper-aluminium joint in subsequent use process.
Utility model content
The utility model aims to solve at least one of the technical problems existing in the prior art.For this purpose, the utility model mentions
A kind of connection structure of heat exchanger, the connection structure of the heat exchanger improve anti-corrosion effect, reduce slip out.
The utility model also proposes a kind of heat exchanger of connection structure with above-mentioned heat exchanger.
The utility model also proposes a kind of connector for heat exchanger.
The embodiment of first aspect according to the present utility model proposes a kind of connection structure of heat exchanger, the heat exchanger
Connection structure includes: connector, and the surface of the connector is formed with diffusion coating；Connecting tube, the connecting tube are inserted into the connector
And it is connected by solder with the joint brazing；Wherein, the corrosion potential of the diffusion coating, the connector corrosion potential,
The corrosion potential of corrosion potential and the connecting tube that weld metal is formed by after the solder brazing successively increases.
Anti-corrosion effect is improved according to the connection structure of the heat exchanger of the utility model embodiment, reduces slip.
Some specific embodiments according to the present utility model, the connector include: header attachment base；Joint body, institute
Joint body is stated set on the header attachment base, the joint body has connecing axially through described along the joint body
The connecting hole of head ontology and the header attachment base；Wherein, the diffusion coating is formed in the interior weekly form of the joint body
At least one of face and peripheral surface surface, the connecting tube are inserted into the connecting hole, and the outer peripheral surface of the connecting tube passes through institute
Solder is stated to be connected with the soldering of the inner peripheral surface of the joint body.
Further, the end face of one end far from the header attachment base of the joint body is equipped with inclined-plane, described
Inclined-plane is gradually tilted to the direction of the header attachment base from outside to inside along the radial direction of the joint body.
Some specific examples according to the present utility model, the connector are aluminium joint or aluminum alloy joint, the connecting tube
For copper pipe, the diffusion coating is spread by the coating that the surface for being formed in the connector is formed, and the coating contains zinc, institute
Zinc is stated from pure zinc, zinc-bearing alloy or zinc compound.
Further, the quality containing zinc of the unit area of the coating is 0.2g/ ㎡ -60g/ ㎡.
Further, the diffusion coating with a thickness of 10 μm -200 μm.
Further, the mass concentration containing zinc of the diffusion coating is 0.5%-20%.
Some specific examples according to the present utility model, the solder contain Al-Si base, Al-Cu-Si base, Al-Cu-Si-
Zn base or Al-Cu-Si-Ni base.
The embodiment of second aspect according to the present utility model proposes that a kind of heat exchanger, the heat exchanger include: header；
The connection structure of heat exchanger described in the embodiment of first aspect according to the present utility model, the connector are connected to the afflux
Pipe, the connecting tube are connected to by the connector with the header.
According to the heat exchanger of the utility model embodiment, pass through the embodiment using first aspect according to the present utility model
The connection structure of the heat exchanger, improves anti-corrosion effect and production efficiency, reduces slip.
The embodiment of the third aspect according to the present utility model proposes a kind of connector for heat exchanger, described for exchanging heat
The connector of device includes: header attachment base；Joint body, the joint body are set to the header attachment base, the connector
Ontology has the connecting hole axially through the joint body and the header attachment base along the joint body；Wherein,
The surface of the joint body is formed with diffusion coating, and the corrosion potential of the diffusion coating is less than the corrosion of the joint body
Current potential.
According to the connector for heat exchanger of the utility model embodiment, treated connector and connecting tube can be made to weld
It is not perishable after connecing.
The additional aspect and advantage of the utility model will be set forth in part in the description, partially will be from following description
In become obvious, or recognized by the practice of the utility model.
Detailed description of the invention
The above-mentioned and/or additional aspect and advantage of the utility model from the description of the embodiment in conjunction with the following figures will
Become obvious and be readily appreciated that, in which:
Fig. 1 is the structural schematic diagram according to the heat exchanger of the utility model embodiment.
Fig. 2 is the structural schematic diagram according to the connector of the connection structure of the heat exchanger tube of the utility model embodiment.
Fig. 3 is the flow chart according to the welding method of the connector and connecting tube of the heat exchanger tube of the utility model embodiment.
Appended drawing reference:
Connector 10,
Header attachment base 20,
Joint body 30, connecting hole 31, inclined-plane 32,
Connecting tube 40, header 50, heat exchanger tube 60, fin 70,
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and should not be understood as to the utility model
Limitation.
In the description of the present invention, it should be understood that the orientation or positional relationship of instruction is based on shown in attached drawing
Orientation or positional relationship, be merely for convenience of describing the present invention and simplifying the description, rather than indication or suggestion is signified
Device or element must have a particular orientation, be constructed and operated in a specific orientation, therefore should not be understood as practical new to this
The limitation of type.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " is pacified
Dress ", " connected ", " connection " shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integrally
Connection；It can be mechanical connection, be also possible to be electrically connected；Can be directly connected, can also indirectly connected through an intermediary,
It can be the connection inside two elements.For the ordinary skill in the art, above-mentioned art can be understood with concrete condition
The concrete meaning of language in the present invention.
Below with reference to the accompanying drawings the connection structure of heat exchanger according to the utility model embodiment is described.
As shown in Fig. 2, including connector 10 and connecting tube 40 according to the connection structure of the heat exchanger of the utility model embodiment.
The surface of connector 10 is formed with diffusion coating.The connecting tube 40 is inserted into connector 10 and by solder and 10 pricker of connector
Weldering is connected.
Wherein, weldering is formed by after the corrosion potential of the diffusion coating, the corrosion potential of connector 10, the solder brazing
Seam corrosion of metal current potential and the corrosion potential of the connecting tube 40 successively increase.
In other words, it is formed after solder brazing described in the corrosion potential < of the corrosion potential < connector 10 of the diffusion coating
Weld metal corrosion potential < described in connecting tube 40 corrosion potential.
Below with reference to the accompanying drawings the welding method of connector and connecting tube according to the heat exchanger of the utility model embodiment is described.
As shown in figure 3, according to the welding method of the connector of the heat exchanger of the utility model embodiment and connecting tube include with
Lower step:
Diffusion coating is formed on the surface of connector 10, the corrosion potential of the diffusion coating is less than the corrosion electricity of connector 10
Position；
Connecting tube 40 is inserted into connector 10；
The connecting tube 40 is brazed in connector 10 by solder, the corruption of weld metal is formed by after the solder brazing
Current potential is lost to be higher than the corrosion potential of connector 10 and be lower than the corrosion potential of the connecting tube 40.
According to the welding of the connector and connecting tube of the connection structure of the heat exchanger of the utility model embodiment and heat exchanger
Method is formed with diffusion coating on the surface of connector 10, and the corrosion potential of each section meets following relationship:
Weld seam is formed by after solder brazing described in the corrosion potential < of the corrosion potential < connector 10 of the diffusion coating
The corrosion potential of connecting tube 40 described in corrosion of metal current potential <.
As a result, by the design of this electric potential gradient, can be avoided occur in corrosive environment weld seam take the lead in corrosion and
The too early spot corrosion of connector 10, and further avoid take the lead in corrosion and thus heap of the bring corrosion product in weld seam of weld metal
Product expands and causes the cracking of the non-corrosion sites of connector 10, so that corrosion fatigue life greatly improved.
Also, corrosion protection is carried out without wrapping up heat-shrinkable T bush, adhesive tape, clay or coating protective layer etc., eliminates docking
The preamble operation that first 10 surface is polished and cleared up, is greatly reduced production process, to effectively improve production efficiency, reduce
Production cost.
Therefore, according to the connector and connecting tube of the connection structure of the heat exchanger of the utility model embodiment and heat exchanger
Welding method has many advantages, such as favorable anti-corrosion effect and high production efficiency, at low cost.
It will be appreciated by those skilled in the art that ground is, according to the connection structure of the heat exchanger of the utility model embodiment with
And heat exchanger connector and connecting tube welding method, the occasion of non-pipe fitting, such as cuprum aluminum transition joint (copper can also be applied to
Aluminium transition row), and can be applied to conductive occasion.In addition, can also further pass through housing heat-shrinkable T bush, adhesive tape, clay
Or coating protective layer etc. meets the requirement under more high corrosion environment to further increase service life.
In some specific embodiments of the utility model, by the diffusion coating be formed in connector 10 inner peripheral surface and
At least one surface in peripheral surface, it is possible thereby to connector 10 corresponding part play the role of it is etch-proof, to be applied to
Different occasion, for example, forming diffusion coating in the inner peripheral surface of connector 10 accordingly when being applied to water system.
In some specific examples of the utility model, as shown in Fig. 2, connector 10 includes header attachment base 20 and connector
Ontology 30.
Header attachment base 20 for being connected with the header 50 of heat exchanger, for example, header attachment base 20 be configured with and
The arcwall face of the outer peripheral surface shape adaptation of header 50.Joint body 30 is set to header attachment base 20, and joint body 30 has
Connecting hole 31, connecting hole 31 is along joint body 30 axially through joint body 30 and header attachment base 20.
Wherein, the diffusion coating is formed in the inner peripheral surface of joint body 30 and at least one surface of peripheral surface,
The connecting tube 40 is inserted into connecting hole 31, and the outer peripheral surface of the connecting tube 40 is brazed by the inner peripheral surface of solder and joint body 30
It is connected, realizes the connection of connecting tube 40 and connector 10, connecting tube 40 can be connected to by connector 10 with header 50, and spread and applied
The peripheral surface or the inner peripheral surface near brazing surface that layer is formed in joint body 30, keep soldering places with higher corrosion-resistant
Property.
Further, as shown in Fig. 2, the end face of one end of the separate header attachment base 20 of joint body 30 is equipped with inclined-plane
32, inclined-plane 32 is gradually tilted to the direction of header attachment base 20 from outside to inside along the radial direction of joint body 30, so on the one hand
It can be convenient connecting tube 40 and be inserted into connecting hole 31, the stability after on the other hand can be improved welding.
In some specific embodiments of the utility model, the surface of connector 10 by electric arc spraying, it is electroless plated or
The mode of coating forms coating, then heats to the coating and connector 10, to form the diffusion coating.
Optionally, the maximum temperature of the heating is 585-615 DEG C, and the heating time of the maximum temperature is 1.5min-
30min, connector 10 can cross furnace together with heat exchanger core body and obtain the diffusion layer.
Optionally, the maximum temperature of the heating is 330-410 DEG C, and the heating time of the maximum temperature is 1h-3h, is connect
First 10 are suitable for individually being diffused processing.
In some embodiments of the utility model, connector 10 is aluminium joint or aluminum alloy joint, and the connecting tube 40 is
Copper pipe, the diffusion coating are spread by the coating that the surface for being formed in connector 10 is formed, and the coating contains zinc, the zinc
From pure zinc, zinc-bearing alloy or zinc compound.
Wherein, the quality containing zinc of the unit area of the coating is 0.2g/ ㎡ -60g/ ㎡, and the diffusion coating contains zinc
Mass concentration is 0.5%-20%.
Further, the diffusion coating with a thickness of 10 μm -200 μm.
The process parameters range of above-mentioned process is in order to ensure diffusion coating thickness and the zinc concentration on surface layer are suitable
In the range of, it on the one hand can guarantee coating diffusion as a result, uniformly, guarantee the time of protection with effective protection weld seam；Another party
Face can slow down the sacrifice speed of diffusion coating, to extend guard time.
In some specific examples of the utility model, the solder contains Al-Si base, Al-Cu-Si base, Al-Cu-Si-
Zn base or Al-Cu-Si-Ni base, solder are formed by the corrosion potential of weld metal between copper and aluminium alloy, avoid weld seam
It takes the lead in corroding, and dissolution of the copper base metal to weld seam further improves the corrosion potential of weld metal in brazing process, ensure that
The effect of anticorrosion ability.
Citing description below is according to the connector of the heat exchanger of the utility model embodiment and the welding method of connecting tube.
Embodiment 1
Connector 10 is aluminium alloy, sprays pure zinc, unit in the peripheral surface of joint body 30 by the way of electric arc spraying
The quality that area sprays zinc is about 1-20g/m2, and the connector 10 after spray zinc is placed in the heating furnace of nitrogen protection and is heated
(can be with heat exchanger core body together or individually into furnace), about 585-615 DEG C of the maximum temperature of heating, it is under maximum temperature plus
About 1.5-10min of hot time is determined with material thickness, cooling after heating.The thickness of the diffusion coating obtained after detection heating
About 10-200 μm, the zinc mass concentration about 1-10% of diffusion coating.
Connecting tube 40 made of copper is put into the connecting hole 31 of above-mentioned connector 10, the solder of Al-Si base is selected, using oxygen second
Alkynes flame is heated, and is brazed by fluoaluminate brazing flux, and product is obtained after the completion of soldering.
The both ends of the said goods are sealed, acid simulated seawater is then carried out and recycles salt spray test (ASTM G85-A3
Standard), after 1000 hours salt spray tests, do not occur outer corrosion leakage.
Embodiment 2
Connector 10 is aluminium alloy, applies pure zinc, unit plane in the peripheral surface of joint body 30 by the way of electric arc spraying
The weight of product spray zinc is about 1-20g/m2, will spray the connector 10 after zinc and is placed in the heating furnace of nitrogen protection that heated (can
With with heat exchanger core body together or individually into furnace), about 330-410 DEG C of the maximum temperature of heating, when the heating of maximum temperature
Between about 1-3 hours, it is cooling after heating.About 20-200 μm of thickness of the diffusion coating obtained after detection heating, diffusion coating
Zinc mass concentration about 1-5%.
Connecting tube 40 made of copper is put into the connecting hole 31 of connector 10, the solder of Al-Cu-Si base is selected, using oxygen second
Alkynes flame is heated, and is brazed by fluoaluminate brazing flux, and product is obtained after the completion of soldering.
The both ends of the said goods are sealed, acid simulated seawater is then carried out and recycles salt spray test (ASTM G85-A3
Standard), after 1000 hours salt spray tests, do not occur outer corrosion leakage.
Embodiment 3
Connector 10 is aluminium alloy, soaks zinc, unit area in the peripheral surface of joint body 30 using the method for chemical zincation
Leaching zinc amount be about 0.2-4g/m2, the connector 10 after zinc will be soaked and be placed in the heating furnace of nitrogen protection and heat, heating
About 585-615 DEG C of maximum temperature, the heating time of maximum temperature about 1.5-10min is adjusted according to material thickness difference, adds
It is cooling after heat.About 20-100 μm of thickness of the diffusion coating obtained after detection heating, the zinc mass concentration of diffusion coating is about
0.3-2%.
Connecting tube 40 made of copper is put into the connecting hole 31 of above-mentioned connector 10, selects the solder of Al-Cu-Si-Zn base, is used
Oxygen acetylene flame is heated, and is brazed by fluoaluminate brazing flux, and product is obtained after the completion of soldering.
The both ends of the said goods are sealed, acid simulated seawater is then carried out and recycles salt spray test (ASTM G85-A3
Standard), after 1000 hours salt spray tests, do not occur outer corrosion leakage.
Embodiment 4
Connector 10 is aluminium alloy, and the peripheral surface of joint body 30 is coated in using the KZnF3 aqueous suspension of 15% concentration,
The weight per unit area of the KZnF3 of coating is about 5-60g/m2, and the connector 10 after coating is placed in heating furnace and is heated
(can be with heat exchanger core body together or individually into furnace), about 585-615 DEG C of the maximum temperature of heating, the heating of maximum temperature
Time about 1.5-10min, it is cooling after heating.About 20-150 μm of thickness of the diffusion coating obtained after detection heating, diffusion applies
The zinc mass concentration about 1-10% of layer.
Connecting tube 40 is put into the connecting hole 31 of connector 10, selects the solder of Al-Cu-Si-Ni base, using oxygen-acetylene fire
Flame is heated, and is brazed by fluoaluminate brazing flux, and product is obtained after the completion of soldering.
The both ends of the said goods are sealed, acid simulated seawater is then carried out and recycles salt spray test (ASTM G85-A3
Standard), after 1000 hours salt spray tests, do not occur outer corrosion leakage.
Embodiment 5
Connector 10 is aluminium alloy, by the binder+15% of 70% Nocolok brazing flux (insoluble brazing flux) powder+15%
Zn powder after mixing, the peripheral surface coated in joint body 30, the Zn content of unit area in the mixture of coating
About 1-6g/m2, the connector 10 after coating be placed in heating furnace heated (can with heat exchanger core body together or
Individually into furnace), 585-615 DEG C of the maximum temperature of heating, the heating time of maximum temperature about 1.5-10min, cooling after heating.Through
About 30-120 μm of thickness of the diffusion coating obtained after detection heating, the zinc mass concentration about 0.5-5% of diffusion coating.
Connecting tube 40 made of copper is put into the connecting hole 31 of above-mentioned connector 10, the solder of Al-Cu-Si base is selected, using oxygen
Gas acetylene torch is heated, and is brazed by fluoaluminate brazing flux, and product is obtained after the completion of soldering.
The both ends of the said goods are sealed, acid simulated seawater is then carried out and recycles salt spray test (ASTM G85-A3
Standard), after 1000 hours salt spray tests, do not occur outer corrosion leakage.
Embodiment 6
Connector 10 is aluminium alloy, by the Zn-5Al powder of the binder+15% of 70% fluoaluminate brazing flux powder+15%
After mixing, the peripheral surface coated in joint body 30, the Zn-15Al content of unit area is about in the mixture of coating
Connector 10 after coating is placed in heating furnace and heats by 1-8g/m2, and about 400-550 DEG C of the maximum temperature of heating, highest
The heating time of temperature about 2-30min, it is cooling after heating.The thickness about 20-200 μ of the diffusion coating obtained after detection heating
M, the zinc mass concentration about 0.5-10% of diffusion coating.
Connecting tube 40 made of copper is put into the connecting hole 31 of above-mentioned connector 10, selects the solder of Al-Cu-Si-Ni base, is used
Oxygen acetylene flame is heated, and is brazed by fluoaluminate brazing flux, and product is obtained after the completion of soldering.
The both ends of the said goods are sealed, acid simulated seawater is then carried out and recycles salt spray test (ASTM G85-A3
Standard), after 1000 hours salt spray tests, do not occur outer corrosion leakage.
Embodiment 7
Connector 10 is aluminium alloy, and the peripheral surface spraying Zn-2Al by the way of electric arc spraying in joint body 30 is closed
Gold, unit area spraying weight be about 3-20g/m2, by spray zinc after connector 10 be placed in the heating furnace of nitrogen protection into
Row heating, it is about 340-375 DEG C of the maximum temperature of heating, the heating time of maximum temperature about 1-3 hours, cooling after heating.Through examining
It surveys after heating and obtains about 50-200 μm of thickness of diffusion coating, the zinc mass concentration about 1-20% of diffusion coating.
Connecting tube 40 made of copper is put into the connecting hole 31 of above-mentioned connector 10, the solder of Al-Si base is selected, using oxygen second
Alkynes flame is heated, and is brazed by fluoaluminate brazing flux, and product is obtained after the completion of soldering.
The both ends of the said goods are sealed, acid simulated seawater is then carried out and recycles salt spray test (ASTM G85-A3
Standard), after 1000 hours salt spray tests, do not occur outer corrosion leakage.
Embodiment 8
Connector 10 is aluminium alloy, and the peripheral surface of joint body 30 is coated in using the KZnF3 aqueous suspension of 20% concentration
And inner peripheral surface, the weight per unit area of the KZnF3 of coating are about 10-60g/m2, and the connector 10 after coating is placed on heating
It is heated in furnace (can be with heat exchanger core body together or individually into furnace), about 585-615 DEG C of the maximum temperature of heating, most
The heating time of high-temperature about 2-10min, it is cooling after heating.The thickness about 50-150 of the diffusion coating obtained after detection heating
μm, the zinc mass concentration about 1-5% of diffusion coating.
Connecting tube 40 made of copper is put into the connecting hole 31 of above-mentioned connector 10, the solder of Al-Cu-Si base is selected, using oxygen
Gas acetylene torch is heated, and is brazed by fluoaluminate brazing flux, and product is obtained after the completion of soldering.
The both ends of the said goods are sealed, acid simulated seawater is then carried out and recycles salt spray test (ASTM G85-A3
Standard), after 1000 hours salt spray tests, do not occur outer corrosion leakage.
Internal corrosion test (ASTM D2570 standard) is carried out to the vias inner walls that the said goods are formed, is surveyed through internal corrosion in 21 days
Do not occur internal corrosion leakage after examination.
Heat exchanger according to the utility model embodiment is described below, as shown in Figure 1, according to the utility model embodiment
Heat exchanger includes the connection structure of header 50 and above-mentioned heat exchanger.
Connector 10 is connected to the header 50, and the connecting tube 40 is connected to by connector 10 with the header 50, even
Adapter tube 40 is mainly refrigerant inlet pipe and refrigerant outlet pipe.
Manufacturing method according to the heat exchanger of the utility model embodiment includes the connector and connecting tube of above-mentioned heat exchanger
Welding method.
According to the heat exchanger and its manufacturing method of the utility model embodiment, have favorable anti-corrosion effect and high production efficiency,
The advantages that at low cost.
Citing describes the manufacturing method of the heat exchanger according to the utility model embodiment below.
Embodiment A (method used comprising one of above-described embodiment 4/5/6/8)
20 points of header attachment base of connector 10 are welded on header 50；
Heat exchanging device core is assembled；
Spelter coating attachment will be contained at the desired position；
Connector 10 and heat exchanger core body integrally cross furnace and complete the welding of heat exchanger core body and formed to spread on connector 10 to apply
Layer；
Heat exchanger core body is come out of the stove；
By connecting tube 40 using the solder welding of one of Al-Si/Al-Cu-Si/Al-Cu-Si-Zn/Al-Si-Cu-Ni
On connector 10.
Embodiment B (method used comprising one of above-described embodiment 1/3)
Butt joint 10 carries out electric arc zn spraying or chemical zincation；
20 points of header attachment base of connector 10 are welded on header 50；
Exchange heat pipe 60, fin 70 and header 50 are assembled；
Tie up fixed assembled heat exchanger core body；
Connector 10 and heat exchanger core body integrally cross furnace and complete the welding of heat exchanger core body and formed to spread on connector 10 to apply
Layer；
Heat exchanger core body is come out of the stove；
By connecting tube 40 using the solder welding of one of Al-Si/Al-Cu-Si/Al-Cu-Si-Zn/Al-Si-Cu-Ni
On connector 10.
Embodiment C (method used comprising one of above-described embodiment 2/7)
Butt joint 10 carries out electric arc zn spraying；
The independent furnace of crossing of connector 10 is formed into diffusion coating；
20 points of header attachment base of connector 10 are welded on header 50；
Exchange heat pipe 60, fin 70 and header 50 are assembled；
Tie up fixed assembled heat exchanger core body；
Connector 10 and heat exchanger core body are integrally crossed into the diffusion coating in the welding and connector 10 of furnace completion heat exchanger core body
Further diffusion；
Heat exchanger core body is come out of the stove；
By connecting tube 40 using the solder welding of one of Al-Si/Al-Cu-Si/Al-Cu-Si-Zn/Al-Si-Cu-Ni
On connector 10.
Embodiment D (method used comprising one of above-described embodiment 2/7)
Butt joint 10 carries out electric arc zn spraying；
The independent furnace of crossing of connector 10 is formed into diffusion coating
Exchange heat pipe 60, fin 70 and header 50 are assembled；
Tie up fixed assembled heat exchanger core body；
Heat exchanger core body crosses the welding that furnace completes heat exchanger core body；
Heat exchanger core body is come out of the stove；
The header attachment base 20 of connector 10 is welded using Al-Si base solder or header 50 is welded on using fusion welding
On；
By connecting tube 40 using the solder welding of one of Al-Si/Al-Cu-Si/Al-Cu-Si-Zn/Al-Si-Cu-Ni
On connector 10.
When heat exchanging device core is assembled in embodiment A- embodiment D, the heat exchanger core body containing fin 70 can be,
It is also possible to the heat exchanger core body without fin 70, i.e., directly exchange heat pipe 60 and header 50 are assembled, and group installs
Heat exchanger core body after can carry out tying up fixation, can also carry out after directly being fixed by welder without tying up
Welding operation, it can the step of omission is tied up.Connector 10 can it is independent cross furnace formed diffusion coating, can also with after assembling
Heat exchanger core body integrally crosses furnace, that is, completes welding operation and be formed simultaneously diffusion coating.
The connector 10 for heat exchanger according to the utility model embodiment is described below.
As shown in Fig. 2, including header attachment base 20 according to the connector 10 for heat exchanger of the utility model embodiment
With joint body 30.
Joint body 30 is set to header attachment base 20, and joint body 30 has along joint body 30 axially through connector
The connecting hole 31 of ontology 30 and header attachment base 20.Wherein, the surface of joint body 30 is formed with diffusion coating, the diffusion
The corrosion potential of coating is less than the corrosion potential of joint body 30.
Included the following steps according to the processing method of the connector 10 of the heat exchanger of the utility model embodiment；
In the surface adhering coating of the connector；
Connector after adhering coating is heated, to form diffusion coating, the diffusion in the outer surface of the connector
The corrosion potential of coating is lower than the corrosion potential of the connector.
According to the connector 10 and its processing method of the heat exchanger of the utility model embodiment, treated connector can be made
10 welded with connecting tube 40 after it is not perishable and high production efficiency, at low cost.
According to other compositions of the heat exchanger of the utility model embodiment and operate for those of ordinary skill in the art
For be all it is known, be not detailed herein.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " illustrative examples ",
The description of " example ", " specific example " or " some examples " etc. means specific features described in conjunction with this embodiment or example, knot
Structure, material or feature are contained at least one embodiment or example of the utility model.In the present specification, to above-mentioned art
The schematic representation of language may not refer to the same embodiment or example.Moreover, description specific features, structure, material or
Person's feature can be combined in any suitable manner in any one or more of the embodiments or examples.
While there has been shown and described that the embodiments of the present invention, it will be understood by those skilled in the art that:
These embodiments can be carried out with a variety of variations, modification, replacement in the case where not departing from the principles of the present invention and objective
And modification, the scope of the utility model are defined by the claims and their equivalents.
Claims (10)
1. a kind of connection structure of heat exchanger characterized by comprising
The surface of connector, the connector is formed with diffusion coating；
Connecting tube, the connecting tube are inserted into the connector and are connected by solder with the joint brazing；
Wherein, weld seam is formed by after the corrosion potential of the diffusion coating, the corrosion potential of the connector, the solder brazing
Corrosion of metal current potential and the corrosion potential of the connecting tube successively increase.
2. the connection structure of heat exchanger according to claim 1, which is characterized in that the connector includes:
Header attachment base；
Joint body, the joint body are set to the header attachment base, and the joint body has along the joint body
The connecting hole axially through the joint body and the header attachment base；
Wherein, the diffusion coating is formed in the inner peripheral surface of the joint body and at least one surface of peripheral surface, institute
It states connecting tube and is inserted into the connecting hole, the outer peripheral surface of the connecting tube passes through the inner peripheral surface pricker of the solder and the joint body
Weldering is connected.
3. the connection structure of heat exchanger according to claim 2, which is characterized in that the separate collection of the joint body
The end face of one end of flow tube attachment base be equipped with inclined-plane, the inclined-plane along the joint body radial direction from outside to inside gradually to described
The direction of header attachment base tilts.
4. the connection structure of heat exchanger according to any one of claim 1-3, which is characterized in that the connector connects for aluminium
Head or aluminum alloy joint, the connecting tube are copper pipe, the coating that the diffusion coating is formed by the surface for being formed in the connector
It spreads, the coating contains zinc, and the zinc comes from pure zinc, zinc-bearing alloy or zinc compound.
5. the connection structure of heat exchanger according to claim 4, which is characterized in that the unit area of the coating contains zinc
Quality is 0.2g/m2-60 g/m2。
6. the connection structure of heat exchanger according to claim 4, which is characterized in that the diffusion coating with a thickness of 10 μ
m-200μm。
7. the connection structure of heat exchanger according to claim 4, which is characterized in that the quality containing zinc of the diffusion coating is dense
Degree is 0.5%-20%.
8. the connection structure of heat exchanger according to any one of claim 1-3, which is characterized in that the solder contains
Al-Si base, Al-Cu-Si base, Al-Cu-Si-Zn base or Al-Cu-Si-Ni base.
9. a kind of heat exchanger characterized by comprising
Header；
The connection structure of heat exchanger according to claim 1 to 8, the connector are connected to the header, institute
Connecting tube is stated to be connected to by the connector with the header.
10. a kind of connector for heat exchanger characterized by comprising
Header attachment base；
Joint body, the joint body are set to the header attachment base, and the joint body has along the joint body
The connecting hole axially through the joint body and the header attachment base；
Wherein, the surface of the joint body is formed with diffusion coating, and the corrosion potential of the diffusion coating is less than the connector
The corrosion potential of ontology.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821512267.9U CN209013818U (en) | 2018-09-14 | 2018-09-14 | Heat exchanger and its connection structure and connector |
| US17/276,019 US20220065560A1 (en) | 2018-09-14 | 2019-09-12 | Welding method of connector and connection tube, connection structure and heat exchanger |
| PCT/CN2019/105567 WO2020052622A1 (en) | 2018-09-14 | 2019-09-12 | Method for manufacturing heat exchanger, method for treating joint, and method for welding joint to connecting pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821512267.9U CN209013818U (en) | 2018-09-14 | 2018-09-14 | Heat exchanger and its connection structure and connector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209013818U true CN209013818U (en) | 2019-06-21 |
Family
ID=66833251
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821512267.9U Active CN209013818U (en) | 2018-09-14 | 2018-09-14 | Heat exchanger and its connection structure and connector |
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| Country | Link |
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| CN (1) | CN209013818U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020052622A1 (en) * | 2018-09-14 | 2020-03-19 | 杭州三花微通道换热器有限公司 | Method for manufacturing heat exchanger, method for treating joint, and method for welding joint to connecting pipe |
-
2018
- 2018-09-14 CN CN201821512267.9U patent/CN209013818U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020052622A1 (en) * | 2018-09-14 | 2020-03-19 | 杭州三花微通道换热器有限公司 | Method for manufacturing heat exchanger, method for treating joint, and method for welding joint to connecting pipe |
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