CN102147205A - Heat exchanger, environment testing device and producing method of heat exchanger - Google Patents
Heat exchanger, environment testing device and producing method of heat exchanger Download PDFInfo
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- CN102147205A CN102147205A CN2011100347028A CN201110034702A CN102147205A CN 102147205 A CN102147205 A CN 102147205A CN 2011100347028 A CN2011100347028 A CN 2011100347028A CN 201110034702 A CN201110034702 A CN 201110034702A CN 102147205 A CN102147205 A CN 102147205A
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Abstract
The invention provides a heat exchanger, an environment testing device and a producing method of the heat exchanger. The heat exchanger (10) comprises a heat transfer pipe (12) having a hairpin bend pipe (20) and a U-shaped bend (24), a radiating fin (15) externally embedded in the hairpin bend pipe (20), and a anticorrosion overlay film (48) having a first overlay film (40) and a second overlay film (46). The first overlay film (40) tightly clings to the peripheral surface of the hairpin bend pipe (20) with a component externally embedded with the radiating fin (15). The second overlay film (46) covers the periphery of the part of the radiating fin (15) contacting with the first overlay film (40) and tightly clings to the first overlay film (40). In this case, the reducing of heat transfer efficiency can be inhibited.
Description
Technical field
The present invention relates to the manufacture method of a kind of heat exchanger, environment test device and heat exchanger.
Background technology
In the past, known just like Japan Patent open communique spy open 2001-208494 number disclosed have implemented the heat exchanger that corrosion resistance covers the heat-transfer pipe of handling.Disclosed heat exchanger has the heat-transfer pipe that is made of copper pipe in this communique, and this heat-transfer pipe has been implemented the overlay film of corrosion resistance and has handled.As this covering material, used to contain aluminium paint (silver powder coating) or carbon coating.Pass a plurality of fin in order groups of fins to be loaded on the heat-transfer pipe of this heat exchanger, to make the copper pipe of having implemented the overlay film processing, under this state, make the copper pipe expansion in the copper pipe by the expander plug being pressed be inserted into.Thus, can make fin and copper pipe crimping.
In the manufacture method of the disclosed heat exchanger of described communique, it is engaged with fin by the copper pipe of having implemented the overlay film processing is expanded.Therefore, because the variations in temperature of heat-transfer pipe when using expand, shrink, so might between fin and heat-transfer pipe, form the gap.In this heat exchanger, there is the low problem of heat transfer efficiency between heat-transfer pipe and the fin.
Summary of the invention
The object of the present invention is to provide a kind of manufacture method that can suppress heat exchanger, environment test device and the heat exchanger of the reduction of heat transfer efficiency.
Heat exchanger provided by the present invention comprises: have first tubing and the heat-transfer pipe of second tubing that engages with this first tubing; Be embedded in the fin of described first tubing outward; And anticorrosion overlay film with first overlay film and second overlay film, wherein, described first overlay film is close to and is comprised the outer outer peripheral face of the position of described fin at interior described first tubing that be embedded with, described second overlay film cover the position that contact with described first overlay film in the described fin on every side and be close to described first overlay film.
Environment test device provided by the present invention comprises: laboratory and air conditioning chamber, wherein, be provided with described heat exchanger in described air conditioning chamber, and the air that has carried out heat exchange at described heat exchanger is fed to described laboratory.
The manufacture method of heat exchanger provided by the present invention comprises: be close to first covering process that outer peripheral face as first tubing of heat-transfer pipe forms first overlay film that anticorrosion uses; Fin is embedded in the fin installation procedure on described first tubing that is formed with described first overlay film outward; Thereby second tubing is engaged the heat-transfer pipe that forms heat-transfer pipe form operation with described first tubing that is embedded with described fin outward; Be close to second covering process that described first overlay film forms second overlay film that the anticorrosion on every side that covers the position that contact with described first overlay film in the described fin uses; And the sintering circuit that makes described first overlay film and the sclerosis of described second overlay film.
According to said structure of the present invention or operation, because around the position that contacts with first overlay film in second overlay film covering fin, in other words, the outer position that is embedded with fin in first tubing is covered by second overlay film, therefore, first tubing of heat-transfer pipe and the heat transfer area between the fin have increased the amount that is equivalent to second overlay film.And, to be close to by making first overlay film and second overlay film, engaging force between first overlay film and the fin strengthens, and its result is even heat-transfer pipe also can be guaranteed the heat transfer path between fin and the heat-transfer pipe because the variations in temperature during use expands, shrinks.Therefore, can suppress heat transfer efficiency changes in time and reduces.
Description of drawings
Fig. 1 is the stereogram of the related heat exchanger of embodiments of the present invention.
Fig. 2 is the cutaway view that is arranged at described heat exchanger and has the hair clip bend pipe (hairpin) of first overlay film on the surface.
Fig. 3 is the cutaway view that the described hair clip bend pipe of expression is interspersed in the state of fin.
Fig. 4 is that the described hair clip bend pipe of expression is by the cutaway view of the state after expanding.
Fig. 5 is the partial enlarged drawing of Fig. 4.
Fig. 6 is the cutaway view of the state that is connected with described hair clip bend pipe of expression return bend.
Fig. 7 is illustrated in the cutaway view that is formed with the state of second overlay film on heat-transfer pipe and the fin.
Fig. 8 is the figure after A portion shown in Figure 7 is amplified.
Fig. 9 is the figure that roughly represents to be provided with the environment test device of described heat exchanger.
The specific embodiment
Below, with reference to accompanying drawing embodiments of the present invention are elaborated.
Fig. 1 is the stereogram of the related heat exchanger of present embodiment 10.As shown in the drawing, this heat exchanger 10 is so-called finned tube (fin and tube) the formula heat exchangers with heat-transfer pipe 12 and fin 15.
Heat-transfer pipe 12 has as the hair clip bend pipe 20 (with reference to Fig. 2) of first tubing and as the return bend 24 of second tubing.Hair clip bend pipe 20 and return bend 24 are the copper pipe that bends to U word shape.In one of them engaged at end of return bend 24 one of them end of hair clip bend pipe 20 is arranged, on the other hand, engage the end that another hair clip bend pipe 20 is arranged in the other end of return bend 24.By with a plurality of hair clip bend pipes 20,20 ... with return bend 24,24 ... connect successively and form a heat-transfer pipe 12 of curved shape.Legend is the heat exchanger 10 that is provided with two heat-transfer pipes 12, but is not limited to this structure.
A plurality of fin 15 separate appointed interval to be arranged along the thickness direction of fin 15, and flange part 26 is outstanding in the same direction.Under this state, the line part 20a of hair clip bend pipe 20 is interspersed in the through hole 15a of each fin 15 respectively.
The end of many (being 2 in legend) heat-transfer pipes 12,12 is connected with header (header) 28.The thermal medium that header 28 will flow through is distributed to each heat-transfer pipe 12, and the thermal medium that flows through from each heat-transfer pipe 12 is converged.Header 28 is connected with the pipe arrangement (omitting diagram) of outside.
Herein, the manufacture method to the related heat exchanger 10 of present embodiment describes.
As shown in Figure 2, hair clip bend pipe 20 has crooked bend 20b at central portion.Extend line part 20a from the end of this bend 20b, and, line part 20a also extended from the other end of bend 20b.These two line part 20a, 20a are parallel to each other.On hair clip bend pipe 20, form first overlay film 40 that anticorrosion is used in the mode of being close to outer peripheral face.This first overlay film 40 is formed at the whole hair clip bend pipe 20 except that the end of two line part 20a, 20a.In addition, the end that does not form first overlay film 40 is the position that is used to engage return bend 24.
On hair clip bend pipe 20, form first covering process (coating process) of first overlay film 40, for example apply (cationic electrodeposition coating) and form film (coating) at the outer peripheral face of the appointed part of hair clip bend pipe 20 by cationic electrodeposition.That is, in advance copper pipe is bent to U word shape and form after the hair clip bend pipe 20,, form at the outer peripheral face of copper pipe and to film at first covering process.
In cationic electrodeposition applies, anode electrode (omitting diagram) is set in the water miscible electrocoating paint in being stored in galvanic deposition cell (omitting diagram), and hair clip bend pipe 20 (coated thing) be impregnated in this electrocoating paint, under this state, apply DC current between antianode electrode and the hair clip bend pipe 20.Thus, the outer surface at hair clip bend pipe 20 forms film (first overlay film 40).
Then, hair clip bend pipe 20 is taken out from galvanic deposition cell and heat, make film (first overlay film 40) semi-harden (the preheating operation) of hair clip bend pipe 20 outer peripheral faces.Preheat operation at this, place under about 40 ℃ to 70 ℃ environment, make first overlay film 40 semi-harden by making the hair clip bend pipe 20 that is formed with first overlay film 40 on the surface.Particularly, this semi-harden state be hardened to the soft state or the coating of the degree that when with finger touches, can not stay fingerprint can be because of the soft state of the sagging degree of deadweight.The thickness of first overlay film 40 for example is about 20 μ m.Because hair clip bend pipe 20 was bent to the shape of appointment in advance before forming first overlay film 40, so need not after forming first overlay film 40, hair clip bend pipe 20 to be carried out bending machining.In addition, coating also can be any in allyl resin class coating, epoxy resin coating, the fluorine type resin coating.
Then, with the fin 15 outer hair clip bend pipes 20 (fin installation procedure) that are embedded in.This fin installation procedure comprises and interts operation and engage operation.In interspersed operation, hair clip bend pipe 20 is interspersed in the through hole 15a of fin 15.In the joint operation, make the line part 20a expansion of the hair clip bend pipe 20 among the through hole 15a that is interspersed in fin 15 and it is engaged with fin 15.
As shown in Figure 3, in interspersed operation, separate appointed interval a plurality of fin 15,15 are set ..., the hair clip bend pipe 20 that will have first overlay film 40 is interspersed in these fin 15,15 successively ... through hole 15a, 15a ... in.In this stage, the external diameter of the line part 20a of hair clip bend pipe 20 is less than the internal diameter of through hole 15a.Therefore, between the outer surface of first overlay film 40 on the line part 20a of the inner peripheral surface of the through hole 15a of fin 15 and hair clip bend pipe 20, be formed with the gap.Therefore, when hair clip bend pipe 20 is interspersed in through hole 15a, can prevent that first overlay film 40 from sustaining damage.
As shown in Figure 4, in the joint operation, make the line part 20a expansion of hair clip bend pipe 20 and it is engaged with fin 15.Expander is used to make line part 20a expansion with parts 43.When inserting hair clip bend pipe 20 in parts 43 expander, expander is expanded line part 20a with parts 43 extruding, thereby the external diameter of line part 20a is increased.Thus, line part 20a is across the inner peripheral surface butt of first overlay film 40 with the flange part 26 of fin 15, and hair clip bend pipe 20 engages with the state that clips first overlay film 40 with fin 15.At this moment, as shown in Figure 5, at the position that contacts with flange part 26, first overlay film 40 is crushed.Therefore, first overlay film 40 is thinner at the thickness at other position than first overlay film 40 at the thickness at the position that contacts with flange part 26.The thickness of first overlay film 40 that is flattened by flange part 26 is about 5 μ m.Like this, first overlay film 40 is close to and is comprised the outer outer peripheral face of the position of fin 15 at the line part 20a of interior hair clip bend pipe 20 that be embedded with.
Then, as shown in Figure 6, connect return bend 24, form heat-transfer pipe 12 (heat-transfer pipe formation operation) in the end that does not form first overlay film 40 of hair clip bend pipe 20.In this operation, the end of the end of return bend 24 and hair clip bend pipe 20 is chimeric, and both junction surfaces are welded, thus hair clip bend pipe 20 is connected with return bend 24.When carrying out this connection, the part that does not form first overlay film 40 in the end of hair clip bend pipe 20 also can be exposed the part.
Then, as shown in Figure 7, form second overlay film 46 (second covering process) at heat-transfer pipe 12 and fin 15.In this operation, for example apply and form film (second overlay film 46) by cationic electrodeposition.In the present embodiment, heat-transfer pipe 12 and fin 15 be impregnated in the interior electrocoating paint of galvanic deposition cell (omitting diagram).Therefore, second overlay film 46 is formed the whole outer surface that covers fin 15 and return bend 24.
Also apply by cationic electrodeposition under the situation about forming at second overlay film 46, second overlay film 46 mainly is formed at position that does not form first overlay film 40 and the position that sustains damage in heat-transfer pipe formation operation.In addition, the position that for example in the outer surface of fin 15, contacts with first overlay film 40 around also form second overlay film 46.And, leave the position (leading section) of first overlay film 40 and the gap landfill between first overlay film 40 in the flange part 26 of second overlay film 46 with fin 15, and be close to first overlay film 40.(for example around the leading section of flange part 26) second overlay film 46 protuberances around it, as shown in Figure 8, the thickness of second overlay film 46 herein is thicker than the thickness at other position.Thus, second overlay film 46 is close to first overlay film 40 in the mode that covers around the position that will contact with first overlay film 40 in the fin 15.At this moment, first overlay film 40 and second overlay film 46 are same shape at the outer peripheral face of line part 20a at whole Zhou Fangxiang.At this moment, because first overlay film 40 is in leather hard, so second overlay film 46 is close to first overlay film 40 easily.In addition, at second covering process, owing to return bend 24 has been bent, so after forming second overlay film 46, need not return bend 24 is carried out bending machining.Therefore, the thickness of second overlay film 46 can attenuation in following process.
Then, make the sintering processes (sintering circuit) of first overlay film 40 and 46 sclerosis of second overlay film.In this sintering circuit,, make first overlay film 40 and 46 sclerosis of second overlay film by placing under about 80 ℃ to 300 ℃ environment at the assembly that heat-transfer pipe 12 has been assembled fin 15.Thus, form anticorrosion overlay film 48 at heat-transfer pipe 12 and fin 15 with first overlay film 40 and second overlay film 46.Then, finish heat exchanger 10 by connecting header 28.
For example shown in Figure 9, the heat exchanger 10 of present embodiment can use in environment test device 50.This environment test device 50 has: the laboratory 52 that can take in sample; And the air conditioning chamber 54 that is used to adjust the temperature and humidity of the air in this laboratory 52.Environment test device 50 for example adopts constant temperature and humidity cabinet.54 heat exchanger 10, heater 58 and the pressure fans 60 that are provided with humidifier 56, present embodiment in the air conditioning chamber.This heat exchanger 10 is as the cooler of cooling air.In addition, heater 58 also can be made of the heat exchanger 10 of present embodiment.
In addition, environment test device 50 is not limited to the experimental rig 50 of described single-channel type, also can be the environment test device 50 of three slot types such as thermal shock rig, and can adopt thermostat to replace described constant temperature and humidity cabinet.
As described above, in the heat exchanger 10 of present embodiment, around the position that contacts with first overlay film 40 in second overlay film, the 46 covering fin 15.In other words, the outer position that is embedded with fin 15 in the hair clip bend pipe 20 is covered by second overlay film 46.Therefore, first tubing of heat-transfer pipe 12 and the heat transfer area increase between the fin 15 are equivalent to the amount of second overlay film 46.And, by first overlay film 40 and second overlay film 46 are close to, the engaging force between first overlay film 40 and the fin 15 strengthens, its result, even the variations in temperature of heat-transfer pipe 12 owing to using expands, shrinks, also can guarantee the heat transfer path between fin 15 and the heat-transfer pipe 12.Therefore, can suppress heat transfer efficiency changes in time and reduces.In addition, by the bond effect of first overlay film 40 and second overlay film 46, can increase the bond strength of fin 15.And, can prevent residual oil content and soup in the gap between hair clip bend pipe 20 and fin 15.In addition, because embedding fin 15 outside on the hair clip bend pipe 20 that is formed with first overlay film 40, and then form second overlay film 46, so can prevent generation because of the bad pin hole that causes of the degreasing of tubing (pinhole).
In the present embodiment, to be embedded with the thickness of first overlay film 40 at position of fin 15 thinner than the thickness of first overlay film 40 at other position in hair clip bend pipe 20 China and foreign countries.Therefore, the hair clip bend pipe 20 of heat-transfer pipe 12 is more approaching with fin 15, thereby can further improve heat transfer efficiency.
In the present embodiment, because second overlay film 46 covers the whole outer surface of fin 15, so can be to a plurality of fin 15 whole unified second overlay films 46 that apply.The manufacturing cost that therefore, can suppress heat exchanger 10.In addition, owing to need not the material of fin 15 is defined as resistant material, can improve the free degree that material is selected.
In the present embodiment, the outer surface at return bend 24 also is formed with second overlay film 46.Therefore, can make return bend 24 also have corrosion resistance.
In the present embodiment, second overlay film 46 before the sintering is formed cover the position that contacts with first overlay film 40 in the fin 15 around.Then, carry out the sintering processes of first overlay film 40 and second overlay film 46.Therefore, first overlay film 40 and second overlay film 46 are close to.In addition, can obtain to suppress that heat transfer efficiency changes in time and the heat exchanger 10 that reduces.
In the present embodiment, form operation, the return bend 24 that bends to U word shape is engaged in hair clip bend pipe 20 at heat-transfer pipe.That is, before return bend 24 formed second overlay film 46, return bend 24 is prebended was processed into U word shape.Therefore, after forming second overlay film 46, need not to carry out the bending machining of return bend 24.Thereby, can avoid thickness to follow the flexural deformation of return bend 24 and attenuation.
In the present embodiment, because all applying by cationic electrodeposition, first overlay film 40 and second overlay film 46 form, so can prevent the inhomogeneous of first overlay film 40 and second overlay film 46.In addition, because overlay film is in the easier formation of parent metal part of tubing, so can prevent to form in the part that is formed with first overlay film 40 and the part of parent metal second overlay film 46 of same thickness at second covering process.In addition, when implementing second covering process, first overlay film 40 is in semi-harden state, therefore first overlay film 40 and second overlay film 46 is close to.In addition, at the fin installation procedure, first overlay film 40 is in semi-harden state, therefore, even hair clip bend pipe 20 is carried out expander processing during embedding fin 15 outside, also can prevent the be full of cracks of overlay film effectively.
In addition, the present invention is not limited to above-mentioned embodiment, can carry out various changes, improvement etc. in the scope that does not break away from its purport.For example, also can adopt fin 15 to have the structure at the positions that contact with hair clip bend pipe 20 parts.
In the present embodiment, adopted second overlay film 46 cover fin 15 integral body structure, but be not limited to this structure.For example, second overlay film 46 also can only be formed at the circumference of fin 15 except around the position that is formed at fin 15 and contacts with first overlay film 40.In this structure, because the mode of the circumference (dull and stereotyped circumference) of the fin 15 that second overlay film 46 section when covering fin 15 moulding exposes forms, so can prevent the corrosion of fin 15 effectively.
In addition, under the situation that fin 15 is formed by resistant material, second overlay film 46 of fin 15 also can only be formed at the contact site that contacts with first overlay film 40 around.In this case, also can form second overlay film 46 at engaged return bend 24.Like this, can make return bend 24 also have corrosion resistance.
In the above-described embodiment, at first covering process, first overlay film 40 is in semi-harden state, but is not limited to this.For example, also can comprise first hardening process that makes 40 sclerosis of first overlay film and second hardening process that makes 46 sclerosis of second overlay film in sintering circuit, wherein, first hardening process carried out before the fin installation procedure, on the other hand, second hardening process carries out after second covering process.In the case, placing about 80 ℃ to 300 ℃ environment to get off to make first overlay film 40 to harden fully by the hair clip bend pipe 20 that will be formed with first overlay film 40 and take out from galvanic deposition cell gets final product.Then, fin 15 being installed on hair clip bend pipe 20 gets final product.In addition, at second hardening process, place about 80 ℃ to 300 ℃ environment to get off to make second overlay film 46 to harden fully by the assembly that will be formed with first overlay film 40 and second overlay film 46.In this manufacture method, because all applying by cationic electrodeposition, first overlay film 40 and second overlay film 46 form, so can prevent the inhomogeneous of first overlay film 40 and second overlay film 46.In addition, because overlay film is in the easier formation of parent metal part of tubing, so can prevent to form in the part of part that is formed with first overlay film 40 and parent metal second overlay film 46 of same thickness at second covering process.Therefore, can obtain the uniform anticorrosion overlay film of thickness on the whole.In addition, at the fin installation procedure, though first overlay film 40 has hardened, this structure also can add the be full of cracks that prevents first overlay film 40 man-hour for fin 15 is installed hair clip bend pipe 20 being carried out expander.
In the above-described embodiment, after hair clip bend pipe 20 forms first overlay film 40, preheat (preheating operation) or heating (first hardening process), but be not limited to this.That is, can after the coating that will be used for first overlay film 40 is coated on hair clip bend pipe 20, not preheat or heat yet, but fin 15 is installed, carry out sintering after forming second overlay film 46 then.
In the above-described embodiment, the structure that does not form first overlay film 40 at fin 15 and return bend 24 is illustrated, but is not limited to this, for example also can be in fin 15 and return bend 24 at least one squarely become first overlay film 40.In the case, only be formed with second overlay film 46 in end of hair clip bend pipe 20 (not forming the position of first overlay film 40) and weld part.
In the above-described embodiment, be illustrated, but compound plating that also can be by nickel-fluororesin or fluororesin apply and form first overlay film 40 and second overlay film 46 apply the method that forms first overlay film 40 and second overlay film 46 by cationic electrodeposition.The compound plating of nickel-fluororesin is following coating processing (coating process), that is, forming on the surface with nickel (Ni) is that main body contains and is 38% fluororesin to the maximum and has filming of multilayer combined polymerization (copolymerization) structure.This coating processing also is based on the coating processing of electro-deposition.On the other hand, fluororesin applies the method (Electrostatic Absorption method) also can utilize the spraying electrostatic powder coating and based on the method for plating (plating).
Herein, above-mentioned embodiment is summarized.
(1) in the above-described embodiment, second overlay film cover the position that contacts with first overlay film in the fin around.In other words, the outer position that is embedded with fin in first tubing is covered by second overlay film.Therefore, first tubing of heat-transfer pipe and the heat transfer area increase between the fin are equivalent to the amount of second overlay film.And, to be close to by making first overlay film and second overlay film, engaging force between first overlay film and the fin strengthens, and its result is even heat-transfer pipe also can be guaranteed the heat transfer path between fin and the heat-transfer pipe because the variations in temperature during use expands, shrinks.Therefore, can suppress heat transfer efficiency changes in time and reduces.In addition, by the bond effect of first overlay film and second overlay film, can increase the bond strength of fin.In addition, can prevent residual oil content and soup in the gap between first tubing and fin.In addition, because embedding fin outside on being formed with first tubing of first overlay film forms second overlay film, then so can prevent the generation because of the bad pin hole that causes of the degreasing of tubing.Therefore, in heat exchanger, can suppress the reduction of heat transfer efficiency with heat-transfer pipe of having implemented the processing of anticorrosion overlay film.
(2) in the present invention, also can be: the thickness of described first overlay film at position that is embedded with described fin outward be than the thin thickness of described first overlay film at other position.In this mode, first tubing and the fin of heat-transfer pipe are more approaching, therefore can further improve heat transfer efficiency.
(3) in the present invention, also can be: described second overlay film covers the whole outer surface of described fin.In this mode,, therefore can suppress the manufacturing cost of heat exchanger owing to can apply second overlay film uniformly to a large amount of fin integral body.In addition, owing to need not the material of fin is defined as resistant material, can improve the free degree that material is selected.
(4) in the present invention, also can be: described second overlay film also be formed at the circumference of described fin.In this mode, the fin circumference that second overlay film will section exposes when the fin moulding covers.Therefore, can prevent the corrosion of fin effectively.
(5) in the present invention, also can be: described second overlay film also be formed at the outer surface of described second tubing.In this mode, can make second tubing also have corrosion resistance.
(6) in the present invention, also can be: described anticorrosion overlay film forms by the compound plating or the fluororesin coating of cationic electrodeposition coating, nickel-fluororesin.In this mode, can with the structure-irrelevant of heat exchanger make thickness form certain thickness.In addition, owing to do not produce VOC (volatile materials), so even, can not produce harmful effect to sample being used under the situation of environment test device yet.
(7) the related environment test device of above-mentioned embodiment comprises, laboratory and air conditioning chamber wherein, are provided with described heat exchanger in described air conditioning chamber, and the air that has carried out heat exchange at described heat exchanger is fed to described laboratory.
(8) in the manufacture method of the related heat exchanger of above-mentioned embodiment, form first overlay film that anticorrosion is used at the outer peripheral face of first tubing, embedding fin first tubing outside then, thus and first tubing engaged the formation heat-transfer pipe with second tubing.Then, form second overlay film in the mode on every side that covers the position that contacts with first overlay film in the fin.Therefore, first tubing of heat-transfer pipe and the heat transfer area increase between the fin are equivalent to the amount of second overlay film.Thus, can obtain to suppress that heat transfer efficiency changes in time and the heat exchanger that reduces.
(9) in the present invention, also can be: at described fin installation procedure, the thickness of described first overlay film at position that is embedded with described fin in addition is embedded in described first tubing than the mode of the thin thickness of described first overlay film at other position outward with described fin.
(10) in the present invention, also can be:, form described second overlay film in the mode of the whole outer surface that covers described fin at described second covering process.In this mode,, therefore can suppress the manufacturing cost of heat exchanger owing to can apply second overlay film uniformly to a large amount of fin integral body.
(11) in the present invention, also can be: at described second covering process, also the circumference at described fin forms described second overlay film.
(12) in the present invention, also can be: form operation at described heat-transfer pipe, described second tubing that bends to U word shape is engaged in described first tubing,, also form described second overlay film at described second tubing at described second covering process.In this mode, before second tubing formed second overlay film, second tubing is prebended was processed into U word shape.Therefore, can avoid thickness to follow the flexural deformation of second tubing and attenuation.
(13) in the present invention, also can be: at described first covering process, apply by cationic electrodeposition and to form described first overlay film, at described second covering process, apply by cationic electrodeposition and to form described second overlay film, the manufacture method of described heat exchanger makes described first overlay film become the operation that preheats of semi-harden state before also being included in described fin installation procedure.In this mode, because all applying by cationic electrodeposition, first overlay film and second overlay film form, so can prevent the inhomogeneous of first overlay film and second overlay film.Overlay film is in the easier formation of parent metal part of tubing.Therefore, can prevent to form second overlay film of same thickness in the part of part that is formed with first overlay film and parent metal at second covering process.In addition, when implementing second covering process, first overlay film is in semi-harden state, therefore first overlay film and second overlay film is close to.In addition, at the fin installation procedure, first overlay film is in semi-harden state, therefore assemble easily during the embedding fin outside, and, even first tubing is carried out expander processing, also can prevent the be full of cracks of overlay film effectively.
(14) in the present invention, also can be: at described first covering process, apply by cationic electrodeposition and to form described first overlay film, at described second covering process, apply by cationic electrodeposition and to form described second overlay film, described sintering circuit comprises first hardening process that makes described first overlay film sclerosis and makes second hardening process of described second overlay film sclerosis, wherein, described first hardening process carried out before described fin installation procedure, and described second hardening process carries out after described second covering process.In this mode, first overlay film hardens at first hardening process, and on the other hand, second overlay film hardens at second hardening process.And, form because first overlay film and second overlay film all apply by cationic electrodeposition, so can prevent the inhomogeneous of first overlay film and second overlay film.Overlay film is in the easier formation of parent metal part of tubing.Therefore, can prevent to form second overlay film of same thickness in the part of part that is formed with first overlay film and parent metal at second covering process.In addition, at the fin installation procedure, though first overlay film hardens, this structure also can add the be full of cracks that the elasticity of utilizing overlay film man-hour prevents first overlay film for fin is installed first tubing being carried out expander.
(15) in the present invention, also can be: at described first covering process and described second covering process, compound plating by nickel-fluororesin or fluororesin apply and form described first overlay film and described second overlay film.
Claims (15)
1. heat exchanger is characterized in that comprising:
Heat-transfer pipe, second tubing that has first tubing and engage with this first tubing;
Fin is embedded in described first tubing outward; And
The anticorrosion overlay film has first overlay film and second overlay film, wherein,
Described first overlay film is close to and is comprised the outer outer peripheral face of the position of described fin at interior described first tubing that be embedded with,
Described second overlay film cover the position that contacts with described first overlay film in the described fin around and be close to described first overlay film.
2. heat exchanger according to claim 1 is characterized in that:
The thickness of described first overlay film at position that is embedded with described fin outward is than the thin thickness of described first overlay film at other position.
3. heat exchanger according to claim 1 is characterized in that:
Described second overlay film covers the whole outer surface of described fin.
4. heat exchanger according to claim 1 is characterized in that:
Described second overlay film also is formed at the circumference of described fin.
5. heat exchanger according to claim 1 is characterized in that:
Described second overlay film also is formed at the outer surface of described second tubing.
6. heat exchanger according to claim 1 is characterized in that:
Described anticorrosion overlay film forms by the compound plating or the fluororesin coating of cationic electrodeposition coating, nickel-fluororesin.
7. environment test device is characterized in that comprising:
Laboratory and air conditioning chamber, wherein,
Be provided with as each described heat exchanger in the claim 1 to 6 in described air conditioning chamber,
The air that has carried out heat exchange at described heat exchanger is fed to described laboratory.
8. the manufacture method of a heat exchanger is characterized in that comprising following operation:
First covering process, the outer peripheral face of being close to as first tubing of heat-transfer pipe forms first overlay film that anticorrosion is used;
The fin installation procedure is embedded in fin outward on described first tubing that is formed with described first overlay film;
Heat-transfer pipe forms operation, thereby second tubing is engaged the formation heat-transfer pipe with described first tubing that is embedded with described fin outward;
Second covering process is close to described first overlay film and is formed second overlay film that the anticorrosion on every side that covers the position that contact with described first overlay film in the described fin is used; And
Sintering circuit makes the sclerosis of described first overlay film and described second overlay film.
9. the manufacture method of heat exchanger according to claim 8 is characterized in that:
At described fin installation procedure, the thickness of described first overlay film at position that is embedded with described fin in addition is embedded in described first tubing than the mode of the thin thickness of described first overlay film at other position outward with described fin.
10. the manufacture method of heat exchanger according to claim 8 is characterized in that:
At described second covering process, form described second overlay film of the whole outer surface that covers described fin.
11. the manufacture method of heat exchanger according to claim 8 is characterized in that:
At described second covering process, also the circumference at described fin forms described second overlay film.
12. the manufacture method of heat exchanger according to claim 8 is characterized in that:
Form operation at described heat-transfer pipe, described second tubing that bends to U word shape engaged with described first tubing,
At described second covering process, also form described second overlay film at described second tubing.
13. the manufacture method of each described heat exchanger in 12 according to Claim 8 is characterized in that:
At described first covering process, apply by cationic electrodeposition and to form described first overlay film,
At described second covering process, apply by cationic electrodeposition and to form described second overlay film,
The manufacture method of described heat exchanger makes described first overlay film become the operation that preheats of semi-harden state before also being included in described fin installation procedure.
14. the manufacture method of each described heat exchanger in 12 according to Claim 8 is characterized in that:
At described first covering process, apply by cationic electrodeposition and to form described first overlay film,
At described second covering process, apply by cationic electrodeposition and to form described second overlay film,
Described sintering circuit comprises first hardening process that makes described first overlay film sclerosis and makes second hardening process of described second overlay film sclerosis, wherein,
Described first hardening process carried out before described fin installation procedure, and described second hardening process carries out after described second covering process.
15. the manufacture method of each described heat exchanger in 12 according to Claim 8 is characterized in that:
At described first covering process and described second covering process, compound plating by the nickel fluororesin or fluororesin apply and form described first overlay film and described second overlay film.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010026514A JP2011163649A (en) | 2010-02-09 | 2010-02-09 | Heat exchanger, environmental testing device and method of manufacturing the heat exchanger |
| JP2010-026514 | 2010-02-09 |
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| CN102147205A true CN102147205A (en) | 2011-08-10 |
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| CN102729018B (en) * | 2012-06-18 | 2017-06-13 | 桐庐千丁科技有限公司 | A kind of small U-tube fully-automatic bent-pipe of air-conditioning and set weld-ring production technology |
| JP6266555B2 (en) * | 2015-03-18 | 2018-01-24 | 伸和コントロールズ株式会社 | Electrodeposition coating method, heat transfer tube manufacturing method, and heat exchanger manufacturing method |
| DE102021206141A1 (en) | 2021-06-16 | 2022-12-22 | Mahle International Gmbh | Process for coating a heat exchanger |
| CN116182615B (en) * | 2023-04-26 | 2023-06-27 | 四川优浦达科技有限公司 | High-efficiency recovery device and method for waste liquid and waste heat of wastewater treatment plant |
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| JP2011163649A (en) | 2011-08-25 |
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Application publication date: 20110810 |