TWI304126B - Heat exchanger, heat exchanger tube member, heat exchanger fin member and process for fabricating the heat exchanger - Google Patents

Description

::.ng will - year & month repair (more) original Ϊ 304126 . U,-1 amendment page 发明, invention description: 1 _ (more) positive domain] (a) [Technical field to which the invention belongs] The present invention is A heat exchanger, a heat exchanger pipe, a heat exchanger heat sink, and a heat exchanger manufacturing method, for example, a condenser or an evaporator of a vehicular air conditioner using a Freon-based refrigerant, and a vehicle using a co2 refrigerant Air conditioners such as gas coolers or evaporators, automotive oil coolers, and car water tanks. The "potential" in the scope of the present specification and the patent application refers to a potential measured using a saturated calomel electrode in a 5 wt% NaCl aqueous solution of PH3. Further, of course, the metal indicated by the element mark is not including the alloy thereof. (2) [Prior Art] A condenser for a vehicle air conditioner using a Freon-based refrigerant is provided with a pair of headers arranged in parallel at a certain interval from each other; the two ends are respectively connected to the two headers The flat heat exchange tubes arranged in parallel are arranged in a venting gap between adjacent heat exchange tubes and welded to the wave fins of the two heat exchange tubes. The condenser is prepared by a joint made of aluminum or aluminum alloy (hereinafter referred to as aluminum), a pipe made of aluminum, and a covered aluminum material on both sides of the original core. The heat-dissipating sheet formed by the hard-welded sheet of the leather material, and the joint box material and the pipe material and the heat-dissipating sheet are simultaneously welded. However, in the above condenser, in order to prevent leakage of the refrigerant from the heat exchange tubes, it is necessary to prevent pitting corrosion on the heat exchange tubes. In the past, in order to prevent pitting corrosion on the heat exchange tubes, it has been proposed to replace the heat sink or the heat exchange tube with a -6-~% 23⁄4 (more) positive replacement stomach correction sheet. A heat exchanger in which the fillet of the welded portion of the heat sink is low in potential and is gradually increased in potential in the order of the fillet, the heat sink, and the heat exchange tube (refer to Japanese Patent Application Laid-Open No. Hei 10-81931 ). According to this heat exchanger, the sacrificial corrosion effect of the fillet prevents the occurrence of pitting corrosion in the heat exchange tube and also prevents the heat sink from being corroded.

However, in the heat exchanger described in the above publication, the fillet is sacrificially corroded, and the fins are peeled off from the heat exchange tube, and as a result, the heat transfer between the heat exchange tube and the fin is lowered, and there is a possibility The problem of reduced heat exchange performance. SUMMARY OF THE INVENTION An object of the present invention is to provide a heat exchanger which can solve the above problems and which can prevent a fin from being peeled off from a heat exchange tube. (3) [Invention content]

1304126 The heat exchanger according to the present invention is a heat exchanger including a heat exchange tube and a heat sink welded to the heat exchange tube, wherein the surface portion of the heat exchange tube has a surface portion having a potential A, and the heat exchange tube has a surface portion other than the surface portion. The potential of the part is B, the potential of the heat sink is C, and the potential formed by the fillet in the welded portion of the heat exchange tube and the heat sink is D. The relationship between these potentials is ASC^D<B By. In the present invention, A'CSD<B in the potential indicates that C is at the same potential as A or higher than A, D is at the same potential as C or higher than C, and B is higher than D. Further, in the heat exchanger of the present invention, the surface layer portion on the outer peripheral surface of the heat exchange tube means, for example, a portion from the outermost surface to a depth of 〇·15 mm. According to the heat exchanger of the present invention, not only the occurrence of pitting corrosion in the heat exchange tubes but also the peeling of the fins from the heat exchange tubes can be suppressed. Therefore, the heat exchange performance can be maintained for a long period of time from -7 to 1304126. In the heat exchanger of the present invention, the potential of each portion can be formed as the potential A of the surface portion of the peripheral surface of the heat exchange tube: -850 to -800 mV, and the potential B of the portion other than the surface portion of the heat exchange tube : -7 10~-67 OmV, heat sink potential C: -850~- 8〇〇mV, the potential of the fillet formed in the welded portion of the heat exchange tube and the heat sink D: - 8 5 0~-8 0 0 mV case. In the heat exchanger of the present invention, the surface portion of the peripheral surface of the heat exchange tube may contain 0.3 to 0.6% by mass of Cu, 0.1 to 0.4% by mass of Μη, 1.0 to 7.0% by mass of Ζη, and the remainder is A1 and impurities are unavoidable. The composition of the A1 alloy is formed; the portion other than the surface portion of the heat exchange tube may be formed of a ruthenium alloy containing Cu 0.3 to 0.6% by mass, Μη 0.1 to 0.4% by mass, and the balance being Α1 and unavoidable impurities; The heat sink may be formed of an A1 alloy containing Ζη 0.9 to 2.8% by mass, Μη 1.0 to 1.5% by mass, Cu 0.15% by mass or less, and the balance being A1 and unavoidable impurities; and formed in the heat exchange tube and heat dissipation The rounded corners of the welded portion of the sheet may be composed of a ruthenium alloy containing CuO.l~0.4% by mass, ^411〇.05~0.3% by mass, Ζη 5 mass% or less, and the remainder being A1 and unavoidable impurities. By. Here, the content of Ζη in the fillet also includes 〇% by mass. And, the heat exchange tube and the heat sink are soldered by the solder containing Si, and therefore, the rounded corner formed in the welded portion of the heat exchange tube and the heat sink naturally contains S i , but this S i There is no influence on the heat exchanger of the present invention, and therefore, the matter concerning the Si content is not mentioned here. Further, the Si content in the fillet is usually about 3.0 to 13.0% by mass. -8- 1304126 Further, the surface portion of the outer surface of the heat exchange tube contains cu 0 ·3 to 0 · 5 mass%, Μ η 0.1 to 0.3 mass%, Ζ η 2 · 0 to 3 · 0 mass%, and the remainder It is ideal for the formation of Α1 alloys which are composed of Α1 and unavoidable impurities. The portion other than the surface portion of the heat exchange tube is an A1 alloy containing Cu 0·3 to 0. 5 mass%, ηη 0.1 to 0.3 mass%, and the remainder being A1 and unavoidable impurities. The formed is ideal. The heat sink is preferably formed of an A1 alloy containing Zn 2.0 to 2.5% by mass, Μη 1.1 to 1.3% by mass, Cu 0.1% by mass or less, and the balance being Α1 and impurities which cannot be avoided. Here, the C u content in the heat sink is in the case of 〇 mass %. The fillet formed in the welded portion of the heat exchange tube and the heat sink contains C u 0.2 to 0.3% by mass, η η 0.1 to 0.2% by mass, Ζ η 3 % by mass or less, and the remainder is Α1 and cannot be avoided. It is desirable to form a bismuth alloy composed of impurities. The content of Ζη in this fillet is the one including the mass% of 〇. The heat exchanger pipe according to the present invention is a heat exchanger pipe for producing a heat exchanger having a heat exchange tube and a heat sink welded to the heat exchange tube, and contains Cu 0.3 to 0.6 mass%, Μη 0.1 to 0.4. Mass %, the remainder is 管1 and the main body of the tube formed by the Α1 alloy which cannot avoid impurities; and the 2~8g/m2 热 thermal spray coating formed on the outer periphery of the main body of the pipe and covering the entire periphery thereof Constitute. In the heat exchanger pipe, the pipe main body is preferably formed of a ruthenium alloy containing Cu: 0.3 to 0.5% by mass, Μη 0·1 to 0.3% by mass, and the balance being A1 and impurities which cannot be avoided. In addition, the Ζη thermal spray coating is -9- 1304126. It is sufficient to replace the page I correction page to form a 2 to 6 g/m2 deposition amount. The heat dissipating sheet for a heat exchanger according to the present invention is a heat dissipating sheet for a heat exchanger for producing a heat exchanger having a heat exchange tube and a heat sink welded to the heat exchange tube, and contains Zn of 0.9 to 2.8 by mass. /〇,Μη 1.0~ι_5

% by mass, the remainder is 芯1 and the core material formed by the Α1 alloy composed of impurities; and, covering at least one side of the core material, and containing Cu 0.1 to 0.4% by mass, Μη 0·1 to 0.3 mass %, the remainder is made up of A1 and the skin formed by the A1 alloy dip consisting of impurities. In the heat exchanger heat-dissipating sheet, the core material is preferably formed of a ruthenium alloy containing Zn of 2.3 to 2.7% by mass, Μη 1.1 to 1.3% by mass, and the balance being A1 and impurities which cannot be avoided. The skin material is preferably formed of a bismuth alloy containing Cu 0.1 〇 〇 3% by mass, Μ η 0·1 〜 0·3 mass%, and the balance being A1 and unavoidable impurities. Further, the coverage of the skin on the side of the core material is preferably 8 to 12%, and more preferably 9 to 11%.

The heat exchanger tube and the heat exchanger heat sink sheet are welded to each other to obtain the heat exchanger of the present invention having the above effects. In the vehicle according to the present invention, a vehicle air conditioner having a compressor, a condenser, and an evaporator and using a Freon-based refrigerant is prepared, and the condenser is constituted by the above-described hot parent converter. Another vehicle according to the present invention is equipped with a vehicular air conditioner having a compressor, condensing 1 and evaporating and using a Lyon refrigerant, and wherein the evaporator is constituted by the above heat exchanger. -10 - 1304126 [Embodiment] [Best Mode for Carrying Out the Invention] Hereinafter, embodiments of the present invention will be described with reference to the drawings. Fig. 1 is a perspective view showing a condenser for a vehicle air conditioner to which the present invention is applied. Fig. 2 is an enlarged cross-sectional view showing a welded portion of a refrigerant flow pipe and a wave fin in the condenser of Fig. 1. Further, Fig. 3 is an explanatory view showing a method of manufacturing a condenser for a vehicle air conditioner. In the first embodiment, the condenser (50) used in the vehicular air conditioner using the Freon-based refrigerant is a pair of aluminum headers (51) and (52) arranged in parallel with each other at a certain interval. The two ends are connected to the two headers (5 1) and (52), and are arranged in parallel with the aluminum extrusion molding material to form a flat refrigerant flow pipe (53) (heat exchange pipe); a ventilation gap between adjacent refrigerant flow pipes (53) and welded to the aluminum wave fins (54) of the two refrigerant flow pipes (53); connected to the upper end of the wall around the first header (51) An inlet pipe (5 5 ) at a portion; an outlet pipe (5 6 ) connected to a lower end portion of the wall around the second header (52); and an inner portion of the first header (5 1 ) located above the middle The first partition plate (57); and the second partition plate (58) disposed in the lower portion of the second header (52) than in the middle. The refrigerant flow pipe (5 3 ) can also be formed by a resistor welded pipe. The number of refrigerant flow pipes (53) between the inlet pipe (5 5 ) and the first separator (57), and the refrigerant between the first separator (57) and the second separator (58) The number of the flow tubes (53) and the number of the refrigerant flow tubes (53) between the second separator and the outlet tube (56) are reduced from top to bottom in this order, and each constitutes For the access group. The gas-phase refrigerant that has flowed in from the inlet pipe (5 5) is combed in a meandering manner in each of the passage group units in the condenser 1304126, and then flows out of the outlet pipe (56). As shown in Fig. 2, the potential of the surface layer portion (53a) from the outermost surface to the depth d (= 15.15) mm on the outer peripheral surface of the refrigerant flow pipe (53) is A, and the refrigerant/flow pipe (53) The potential of the portion (53b) other than the surface layer portion (53a) (hereinafter referred to as the core portion) is B, the potential of the wave fin (54) is C, and the flow is formed in the cold medium flow tube (5 3 When the potential of the rounded corner (59) of the welded portion of the wave fin (5 4) is D, the relationship of these potentials to potential is A ' C $ D < B. In other words, these potentials are potentials A of the surface layer 0 (53a) which is the outer surface of the refrigerant flow pipe (53): - 85 0 to -800 mV, and the potential B of the core portion (53b) of the refrigerant flow pipe (53): -710~-670mV, the potential of the wave fin (54) C: -850~-800mV, the potential of the fillet (59) D: -850~-8 0 0mV. Here, the above potentials A to D can satisfy the relationship of ASCSD < B at the potential, and the potential A: -850 to -800 mV, the potential B: -710 to -670 mV, and the potential C: -850 to -800 mV, When the potential D is -850 to -800 mV, pitting corrosion can be prevented from occurring on the refrigerant flow pipe (53), and significant corrosion of the fillet (59) can be prevented, and the wave fin (54) can be suppressed. Peel off from the refrigerant flow pipe φ (5 3). Here, the surface layer portion (5 3 a) of the peripheral surface of the refrigerant flow pipe (53) is made of Cu 0.3 to 0.6 mass. /〇, Μη 0. 1 to 0.4% by mass, Zn 1 ·0 to 7.0% by mass, the balance being A1 and the A1 alloy which cannot be avoided by impurities, and the core of the refrigerant flow pipe (53) (5 3b) It is formed of a ruthenium alloy containing Cu 0.3 to 0.6% by mass, Μη 0.1 to 〇.4% by mass, and the balance being A1 and unavoidable impurities. The surface portion of the peripheral surface of the refrigerant flow tube (5 3 ) (5 3 Ζ η is such that the potential of the surface layer -12 - 1304126 (5 3 a) can be lowered to increase the potential difference from the core portion (5 3 b) When the surface layer portion (53 a) is sacrificially corroded, the effect of the corrosion resistance of the refrigerant flow tube (53) is improved. However, if the content is less than 1. 〇 mass%, the failure is not obtained. According to the above effects, the pitting corrosion resistance of the refrigerant flow pipe (53) cannot be ensured, and if it exceeds 7.0% by mass, the surface portion (53 a) is excessively corroded, and white powder or peeling of the wave fin (54) occurs. Therefore, the Zri content of the surface layer portion (53a) is preferably 1.0 to 7.5 mass%, and is preferably 2.0 to 3.0% by mass. Further, the Cu content of the surface layer portion (53a) is 0.5 to 0.5% by mass. Preferably, the content of Μη is preferably 0.1 to 0.3% by mass. The Cu of the core portion (53b) of the refrigerant flow tube (53) can raise the potential of the core portion (53b) to The potential difference of the surface layer portion (53 a) is increased, thereby causing the surface layer portion (53a) to sacrificially rot, thereby improving the pitting resistance of the refrigerant flow tube (53). However, if the content is less than 0.3% by mass, the above effect is not obtained, and the pitting corrosion resistance of the refrigerant flow pipe (53) cannot be ensured. If it exceeds 〇6 mass%, the noble metal Cu is present in A1. The existence of A1 will be sacrificed corrosion. Its self-protection corrosion resistance will be reduced. Therefore, the C u content of the core (5 3 b ) should be 0 · 3~0 · 6 mass%, and 〇 · 3 ~ 〇 5 mass% is ideal. Further, the Μη of the core (5 3 b) is the same as Cu, and the potential of the core (53 b) can be increased to increase the potential difference from the surface portion (5 3 a). Therefore, the effect of the pitting corrosion resistance of the refrigerant flow pipe (5 3 ) is improved by sacrificial corrosion of the surface layer portion (5 3 b ), but if the content is less than 0.1% by mass, the above is not obtained. The effect 'The pitting resistance of the refrigerant flow pipe (5 3 ) is not ensured', and when it exceeds 0.4% by mass, the workability at the time of extrusion molding of the refrigerant flow pipe (53) is lowered. The content of Μη of (53b) should be 〇·1~〇.4% by mass, and 0.1 -13 - 1304126 to 0.3% by mass is ideal. Waveform heat sink (54) It is formed of an A1 alloy containing Zn 〇·9~2·8 mass%, Mn 1,0~1.5 mass%, Cu 0.15 mass% or less, and the remainder is A1 and unavoidable impurities. The Z n of 5 4) is such that the potential of the wave fin (54) can be lowered, whereby the potential of the surface layer portion (53a) and the fillet (59) of the refrigerant flow tube (53) can be made The same degree of effect. However, if the content is less than 0. 9 mass%, the potential of the wave fin (5 4) will increase. The sacrificial corrosion of the fillet (5 9) will be enhanced, and the wave fin (5 4) will occur. If it is more than 2.8% by mass, the potential of the wave fin (5 4 ) will decrease. The wave fin (5 4) will prematurely rot and the heat exchange performance will be lowered. Therefore, the Zn content of the corrugated fin (5 4) should be 〇·9 to 2.8 mass% Å and preferably 2.0 to 2.5% by mass. The Mn of the wave fin (5 4 ) has the effect of ensuring the strength of the wave fin (5 4 ) itself, but if the content is less than 1 · 〇 mass %, the intensity of the wave fin (54) may be insufficient. It becomes the cause of the deformation of the wave fin (54), and is more than 7.5 mass. When the thickness of the wave fin (5 4) is too large, the formability is lowered. Therefore, the Mn content of the wave fin (54) should be 1. 0~1. 5 mass. /〇, and 1. 1~1 · 3 mass% is ideal. The Cu of the wave fin (5 4) is as described in the item of the refrigerant flow tube (5 3 ), which causes a decrease in its self-protection corrosion resistance, or because the potential of the wave fin (54) is excessively raised. Causes the decay of the fillet (5 9). Therefore, the content of Cu should be 0.15 mass% or less, and 〇·1 mass °/. Ideal. The fillet (59) formed in the welded portion of the refrigerant flow tube (53) and the wave fin (54) is composed of Cu 0.1 to 0.4 mass%. Mn 〇·05~〇·3贞 -14- 1304126 The repair of the page is corrected by the amount of %, Zn 5 mass% or less, and the remainder is formed by A1 and A1 alloy which cannot avoid impurities. The Cu of the fillet (59) raises the potential of the fillet (59) so as to be the same as the potential of the surface portion (53a) and the wave fin (54) of the refrigerant flow tube (53). Degree, but with the effect of preventing the peeling of the wave fin (5 4). However, if the content is less than 1%, the potential of the fillet (59) may not be sufficiently increased, causing corrosion of the fillet (59) and peeling of the wave fin (54). On the other hand, if it exceeds 0.4% by mass, the above-mentioned one will cause a decrease in self-protection and corrosion resistance. Therefore, the Cu content of the fillet (59) should be 0.1 to 0.4% by mass, and preferably 0.2 to 0.3% by mass. The Μη of the fillet (59) is the same as Cu, so that the potential of the fillet (59) can be raised to make it with the surface portion (53 a) of the refrigerant flow tube (53) and the wave fin ( The potential of 5 4) is the same, and the effect of peeling off the wave fin (54) is prevented. However, if the content is less than 5% by mass, the above effect of the fillet (59) is not sufficient, and if it exceeds 0.3% by mass, the inner fillet (59) has the self-protective corrosion resistance as described above. Will be reduced. Therefore, the content of Μη of the fillet (59) should be 0.05 to 0.3% by mass, and preferably 0.1 to 0.2% by mass. Further, the Zn of the inner corner (5 9) lowers the potential of the inner fillet (59) and promotes the corrosion of the fillet to cause the fillet (59) to peel off. Therefore, the content of Zn should be 5% by mass or less, and preferably 3% by mass or less. Further, as will be described later, the refrigerant flow pipe (53) and the wave fin (54) are welded by a material containing Si. Thus, of course, the fillet (59) also contains Si, but this Si is a condenser. The corrosivity of (50) has no effect, so the details about the Si content are not mentioned here. However, the Si content in the fillet (59) is usually about 3.0 to 13.0% by mass. -15- 1304126 The surface layer portion (53 a) and the core portion (53 b) of the refrigerant flow tube (53), the wave fin (54), and the inner fillet (59) are alloys as described above. The potential A of the surface layer portion (53 a), the potential B of the core portion (53 b), the potential C of the wave fin (54), and the potential D of the fillet (59) can be formed. The relationship at the potential becomes A$CSD<B, and it can be made to be a potential A: -850 to -800 mV, potential B: -710 to -670 mV, potential C: -850 to -800 mV, potential D: -8 5 0 ~-800mV. The condenser (50) was produced in the following procedure. First, a plurality of refrigerant flow pipes (60), a plurality of wave heat dissipation sheets (61), and one of the same number of pipe insertion holes as the refrigerant flow pipes (60) are prepared for the aluminum pipe joint box ( The figure is not shown). The refrigerant flow pipe (60) is an aluminum extrusion formed of a ruthenium alloy containing Cu 0.3 to 0.6% by mass, Μη 0.1 to 0.4% by mass, and the balance being A1 and unavoidable impurities, as shown in Fig. 3 . The tubular body (60a) of the formed material is composed of a 2 to 8 g/m2 Zn thermal sprayed layer (60b) formed on the outer periphery of the tubular body (60a) and covering the entire outer surface thereof. The Cu of the tubular body (60a) is such that the potential of the core (53b) in the refrigerant flow pipe (53) of the manufactured condenser (50) is raised to be in contact with the surface portion (5 3 a) The potential difference is increased to cause the surface layer portion (53 a) to be sacrificially corroded, and the pitting corrosion resistance of the refrigerant flow tube (53) is improved. However, if the content is less than 0.3% by mass, the above-mentioned failure is not obtained. The effect is that the pitting corrosion resistance of the refrigerant flow pipe (53) formed by the refrigerant flow pipe (60) cannot be ensured, and when it exceeds 0.6 mass%, the refrigerant flow pipe formed by the refrigerant flow pipe (60) (53) Self-protection and corrosion resistance will be reduced. Therefore, the Cu content of the tubular body (6〇a) should be -16 - 1304126 at 〇 3 to 0 · 6 mass%, and 0 to 3 to 0.5 mass. /. Ideal. Further, Tn of the tubular body (60a) can increase the strength of the tubular body (60a), and can raise the potential of the core portion (53b) in the refrigerant flow pipe (53) of the manufactured condenser (50). The potential difference between the surface layer portion and the surface layer portion (53 a) is increased to cause the surface layer portion (53 a) to be sacrificially corroded, thereby improving the pitting corrosion resistance of the refrigerant flow tube (53), but if the content thereof is not When the temperature is 0.1% by mass, the above effect is not obtained, and the pitting corrosion resistance of the refrigerant flow pipe (53) formed by the refrigerant flow pipe (60) cannot be ensured, and if it exceeds 0.4% by mass, the tubular body ( The workability at the time of extrusion of 60a) is lowered. Therefore, the content of Μη of the tubular body (60a) should be 0.1 to 0.4 mass%, and 0.1 to 0.3 mass. /〇 is ideal. The Ζη which forms the 热n thermal sprayed layer (60b) is diffused on the outer peripheral surface of the tubular body (60a) during the welding described later, so that the refrigerant flow pipe (5 3) formed by the refrigerant flow pipe (60) The potential of the surface layer portion (5 3 a) is lowered to make it sacrificially corroded, and has the effect of preventing pitting corrosion in the refrigerant flow pipe (53), but it cannot be obtained if the thermal spraying amount is less than 2 g/m2. If the effect exceeds 8 §/m2, it will spread into the fillet (5 9), and the potential of the fillet (5 9) will decrease. Thus, it is easy to generate a wave fin (5 4) from the refrigerant. The flow tube (53) is peeled off. Therefore, the amount of thermal spraying should be 2 to 8 g/m2, and preferably 2 to 6 g/m2. The corrugated heat-dissipating sheet (61) is a core material formed of an A1 alloy containing Ζη 0.9 to 2.8% by mass, Μη 1.0 to 1.5% by mass, Cu 0.3% by mass or less, and the balance being A1 and unavoidable impurities ( 61a), and covered on both sides of the core material (61 &), and consists of 3 丨 7.9~9.5 mass ° /. , ^0.1 ～0 · 4 mass%, Μ η 0. 1~〇. 3 mass%, the rest is A 1 and cannot -17- 1304126

Repair (more) replacement page correction page

It is made up of a skin material (6 lb) formed by the A1 alloy material composed of impurities. The coverage of the core material (6 la)-face of the skin material (61b) is 8 to 12%. If the k coverage is less than the lower limit, it is necessary to weld the corrugated heat-dissipating sheet (61) to the refrigerant flow pipe (60) with the alloy material melted from the skin material (6 lb). After that, if it exceeds the upper limit, there will be a person who has been eroded by excess material. The coverage is ideal from 9 to 1 1%.

The Zn of the core material (61a) of the corrugated heat dissipating sheet (61) is a potential having a corrugated fin (54) capable of controlling the manufactured condenser (50) so as to be in contact with the surface portion of the refrigerant flow tube (53). The potential of (53 a) and the fillet (59) has the same effect. However, if the content is less than 0.9% by mass, the potential of the wave fin (54) is too high, and if it exceeds 2.8% by mass, The corrosion resistance of the wave fin (5 4) is reduced. Therefore, the Zn content of the core material (61a) should be 〇·9 to 2.8 mass%, and preferably 2.3 to 2.7% by mass. Further, Μη of the core material (61a) has an effect of increasing the strength of the wave fin (54) formed by the corrugated heat radiating sheet (61), but if the content thereof is less than 1 · 〇 mass %, the waveform The heat sink (5 4 ) may not have sufficient strength, and if it exceeds 1.5 mass%, the formation of the wave heat-dissipating sheet (61) may be difficult. Therefore, the content of Μη of the core material (61 a) should be from 1 〇 to 1.5% by mass, and preferably from 1.1 to 1.3% by mass. Further, the Cu of the core material (61a) is such that the potential of the wave fin (54) formed by the corrugated heat radiating sheet (61) in the manufactured condenser (5) is increased to promote the inner circle. Sacrificial corrosion of the corner (59), and can reduce the self-protection of the wave fin (54), so the content of Cu should be 〇 ♦ 0 3 mass. /. the following. The S1 of the skin material (61b) of the corrugated heat-dissipating sheet (61) is necessary for the skin material (61|3) to have a function of dip, and the content thereof should be 7·9 to 9·5 Berry/〇. . 18- 1304126 m.3. 2 ο η Η 沭

It is corrected that the Cu of the sheet material (61b) has an effect of making the calcium carbide of the inner fillet (59) high, but if the content is less than 1% by mass, the effect is not obtained, and if it exceeds 0. At 4% by mass, wafer corrosion occurs and its self-protection uranium resistance is reduced. Therefore, the Cu content of the skin material (61b) should be 〇·ΐ~〇·4% by mass, and preferably 0.1 to 0.3% by mass. The Μη of the skin material (61b) has an effect of increasing the potential of the fillet (59), but if the content is less than 0.1% by mass, the effect is not obtained, and if it exceeds 〇·3 mass%, Intergranular corrosion will occur, and its self-protective corrosion resistance will be reduced. Therefore, the content of Μη of the leather material (6 lb) should be 0.1 to 0.3% by mass. Next, the pair of header materials are arranged at intervals, and the plurality of refrigerant flow pipes (60) and the wave heat dissipation sheets (61) are alternately arranged, and both ends of the refrigerant flow pipe (60) are inserted into the pipe. The pipe material of the box is inserted into the hole. Then, a fluoride-based flux (a eutectic composition of potassium fluoride and aluminum fluoride) is applied to these components, and heated at a predetermined temperature in a nitrogen atmosphere, thereby utilizing a layer of tantalum provided in the header material. The cold medium flow pipe (60) is welded to the pipe joint material, and the heat transfer material (60) and the wave heat dissipation sheet (61) are welded by the skin material (61b) of the wave heat dissipation sheet (61). . . . Thus, a condenser (50) for a vehicle air conditioner is manufactured. The condenser is a refrigerating cycle system using a freon-based refrigerant together with a compressor and an evaporator, and can be used as a vehicle air conditioner and mounted on a vehicle such as a car. Hereinafter, specific examples of the present invention will be described together with comparative examples. Example 1 An alloy having the composition shown in Table 1 was used to be extruded into a tubular main-19-1304126 body (6〇a), and 4 g/m2 was formed on the entire outer surface of the tubular body (60a). The Zn thermal spray coating (60b) is obtained as a refrigerant flow pipe (60). Further, the core material (6 la) and the skin material (6 lb) covering both surfaces of the core material (6 la) were formed into corrugated heat-dissipating sheets (6 丨) each holding the components shown in Table 2. The coverage of the leather material (6丨b) on the core material (6 la) of the wave-shaped heat-dissipating sheet (61) was 10%. Also, prepare appropriate joint boxes. Table 1 Composition (% by mass) A1 Cu Μη Si Fe Mg Cr Zn Ti Example 1 Remaining portion 0.49 0·29 0.06 0.15 0.01 <0.01 0.01 0.01 Comparative Example 1 Remaining portion 0.15 0.02 0.10 0.21 0.01 <0.01 <0.01 0 , 01 Comparative Example 2 Remaining part 0.40 0.19 0,05 0.17 0.01 0.01 0.01 0.01 Table 2

Component (% by mass) A1 Si Fe Cu Μη Mg Zn Ti Example 1 Remaining portion of core material 0.35 0.17 <0.01 1.2 <0.01 1.1 <0.01 Remaining portion of leather material 8.8 0.16 0.3 0.1 <0.01 0.02 <0.01 Comparative Example 1 Remaining portion of the core material 0.35 0.20 < 0.01 1.2 < 0.01 1.2 < 0.01 Remaining portion of the leather material 8.9 0.20 < 0.01 < 0.01 < 0.01 1.2 < 0.01 Comparative Example 2 Remaining portion of the core material 0.36 0.18 < 0.01 1.2 <0.01 1.1 <0.01 Remaining portion of the leather material 8.8 0.19 <0.01 0.01 <0.01 <0.01 0.01 -----J Next, the refrigerant flow pipe (60) and the wave heat-dissipating sheet (61) and the pipe joint The box materials were combined in the same manner as in the above embodiment, and -20 - 1304126 2 〇 modified sheet fluoride-based flux (the eutectic composition of potassium fluoride and aluminum fluoride) was applied to these components, and the nitrogen gas atmosphere was used in a nitrogen atmosphere. The predetermined temperature is heated, whereby the refrigerant flow pipe (60) is welded to the header pipe by the coating layer provided in the header material, and the leather material (6 lb) of the wave heat-dissipating sheet (61) is simultaneously used. The refrigerant flow pipe (60) is welded to the wave heat dissipation sheet (61). Made vehicular air conditioner condenser (50). In the peripheral surface of the refrigerant flow pipe (53) of the condenser 50, the composition and potential of the surface portion (53a) from the surface to 0.15 mm deep; the composition and potential of the wave fin (54); and, formed by welding The composition and potential of the fillet (59) are shown in Table 3, respectively. Further, the core portion (53b) of the refrigerant flow pipe (53) of the condenser (50) has the same composition as that of the tubular body (60a) before welding shown in Table 1, and has a potential of -690 mV. Table 3 Composition (% by mass) Potential (mV) A1 Cu Μη Ζη Example 1 Remaining portion of the tube surface portion 0.49 0.29 1.7 -840 Remaining portion of the heat sink 0.07 1.1 1.1 -840 Remaining portion of the fillet 0.30 0.1 2.7 -830 Die core Remaining part 0.49 0.29 - -690 Comparative example 1 Remaining part of tube surface layer 0.10 <0.01 3.0 -950 Remaining part of heat sink 0.10 1.2 1.1 -900 Remaining part of fillet <0.01 0.1 3.6 -960 Remaining part of the core 0.10 0.01 - -730 Comparative Example 2 Remaining part of the tube surface layer 0.39 0.22 2.2 -830 Remaining part of the heat sink 0.04 1.1 1.2 -840 Remaining part of the fillet <0.01 0.1 3.9 -920 Remaining part of the die 0.40 0.23 - -695 -21- 1304126 Comparative Example 1 A tubular body having the same shape as that of Example 1 was extruded using ns All 00 (Japanese Industrial Standard Aluminum and Aluminum Alloy) having the composition shown in Table 1, and 10 g was formed on the entire outer surface thereof. /m2 Zn thermal spray coating to obtain a refrigerant flow pipe. Further, each of the core material having the components shown in Table 2 and the skin material covering both sides of the core material were formed into a corrugated heat-dissipating sheet. The coverage of the core material on the corrugated heat sink is 10%. Then, a condenser for a vehicle air conditioner was produced in the same manner as in Example 1 using a tube and a corrugated heat-dissipating sheet and an appropriate header. In the peripheral surface of the refrigerant flow pipe of the manufactured condenser, the composition and potential of the surface portion from the surface to 0.15 mm deep; the composition and potential of the wave fin after welding; and the inner portion formed by welding The composition and potential of the rounded corners are shown in Table 3, respectively. Further, the portion of the tube after welding except for the surface portion thereof was the same as JISA 1000, and its potential was -730 mV. Comparative Example 2 Using a alloy having the composition shown in Table 1, a tubular body having the same shape as that of Example 1 was extrusion-molded, and a 4 g/m2 Zn thermal sprayed layer was formed on the entire outer surface thereof to obtain a refrigerant. Circulation pipe. Further, the core material holding the components shown in Table 2 and the skin material covering both sides of the core material were formed into a wave-shaped heat radiating sheet. The coverage of the core material on the core of the corrugated fin is 10%. Then, a condenser for a vehicle air conditioner was produced in the same manner as in Example 1 using a pipe material and a corrugated heat radiating sheet and an appropriate header material. In the peripheral surface of the refrigerant flow pipe of the manufactured condenser, the composition and potential of the surface portion from the surface to -22 - 1304126 0 · 15 mm depth; the composition and potential of the wave fin after welding; and The composition and potential of the formed fillet are as shown in Table 3, respectively. Further, the components of the welded portion other than the surface layer portion were the same as those shown in Table 1, and the potential was -690 mV. Evaluation test Each of the condensers for vehicle air conditioners of Example 1 and Comparative Examples 1 and 2 was subjected to an acidic environmental corrosion resistance test (40 days) and a salt-dry-wet-cold-thermal cycle test (1 6 8 days). Then, the refrigerant flow pipe is cut out from the condenser for each of the vehicle air conditioners, and is separated from the portion where the wave fins are welded to the refrigerant flow pipe by about 5 mm (the refrigerant flow pipe (5 3) in Fig. 2) The surface is separated upward by about 5 mm), and the corrugated fin is cut to measure the remaining weld on the refrigerant flow tube of the corrugated fin relative to the full length of the corrugated fin on the refrigerant flow tube. The ratio of the lengths was used to determine the residual ratio of the wave fin bonding, and the results are shown in Table 4. Table 4 Heat sink bonding residual ratio (%) Acidic environment test salt-dry-wet-cold-heat cycle test Example 1 60 to 75 85 to 95 Comparative Example 1 0 to 5 0 to 5 Comparative Example 2 25 to 45 50 ~ 70 to 4th to 7th are views of an evaporator for a vehicle air conditioner to which the present invention is applied. In the following description, the upper and lower sides and the right and left sides of Fig. 4 are referred to as the upper and lower sides, and the left and right sides, respectively, on the downstream side of the air flowing through the ventilation gap between the adjacent heat exchange tubes of the heat exchange tube group (the 4 arrow X shows the air flow side -23- 1304126 9773. ~ Year Ei repair (text) is replacing the page correction page, the right side of Figure 5 is called before, and the opposite side is called back. In the fourth embodiment, the evaporator (1) used in the vehicle air conditioner using the Freon refrigerant is provided with an aluminum refrigerant entering and exiting side tank (2) arranged at a certain interval in the vertical direction; the aluminum refrigerant medium turning side tank (3); and a heat exchange core component (4) disposed between the two boxes (2) and (3). The refrigerant inlet/outlet side tank (2) is provided with a refrigerant inlet header (5) on the front side (downstream side in the ventilation direction) and a refrigerant outlet header (6) on the rear side (upstream side in the ventilation direction). The refrigerant turning side tank (3) is provided with a refrigerant inflow side header (7) on the front side and a refrigerant outflow side header (8) on the rear side. The heat exchange core member (4) is a heat exchange tube group (11) composed of a plurality of heat exchange tubes (9) arranged side by side at a certain interval in the left-right direction, and is arranged in a plurality of rows in the front-rear direction, here in two columns. The configuration is made up. A ventilation gap between adjacent heat exchange tubes (9) of each heat exchange tube group (11) and an outer side of the heat exchange tubes (9) at the left and right ends of each heat exchange tube group (11) are disposed. A wave fin (12) soldered to the heat exchange tube (9). The aluminum side plates (13) welded to the wave fins (12) are disposed on the outer sides of the waveform heat sinks (12) at the left and right ends. The upper and lower ends of the heat exchange tube (9) of the front heat exchange tube group (11) are respectively connected to the refrigerant inlet header (5) and the refrigerant inflow side header (7), and the rear heat exchange tube group. The upper and lower ends of the heat exchange tube (9) of (11) are connected to the refrigerant outlet side header (6) and the refrigerant outlet side header (8), respectively. The refrigerant inlet and outlet side tank (2) shown in Figs. 5 and 6 is a plate-shaped first member which is formed of an aluminum brazing sheet having a tantalum layer on both sides thereof and is connected to the heat exchange tube (9). (14); a second member (15) composed of a bare material formed of an aluminum extruded material and covering the upper side of the first member (14); and an aluminum made by closing both ends of the left and right-24-1304126 Covers (16), (17). The first member (14) is provided at a central portion of the front and rear side portions thereof, and is provided with a curved portion (18) having a small curvature and a circular cross section. In each of the curved portions (18), a plurality of tube insertion holes (19) having a longer diameter in the front-rear direction are formed at a certain interval in the left-right direction. The tube insertion holes (19) of the front and rear bending portions (18) are each at the same position in the left-right direction. The front edge of the front side curved portion (18) and the rear edge of the rear side curved portion (18) have side walls (18a) formed integrally therewith over the entire length. Further, a plurality of through holes (22) are formed in the flat portion (21) between the two curved portions (18) of the first member (14) at a certain interval in the left-right direction. The second member (15) is a substantially m-shaped cross section having an opening at the lower side, and includes two front and rear walls (23) extending in the left-right direction, and disposed between the front and rear walls (23). a central portion extending in the left-right direction, and separating the refrigerant into the side box (2) into a partition wall (24) of the front and rear spaces; and, respectively, the front and rear walls (23) and the partition wall (24) The upper ends are connected to each other and the two arc-shaped connecting walls (25) projecting upward. The both side edges of the second member (15), that is, the lower edge portions of the front and rear walls (23), are formed integrally with the entire length of the second member (15), and are connected to the inside of the headers (5) and (6). A tube supporting rib (26) that protrudes and protrudes from the side (lower side) of the first member (14). Between the upper front portion of the tube supporting rib (26) on the rear side and the lower end portion of the partition wall (24), a shunt blocking plate (27) integrated with the entire length is connected. In a portion other than the left and right end portions of the rear side portion of the shunt blocking plate (27), a plurality of refrigerant flow holes are formed in a shape that is spaced apart in the left-right direction and has a long diameter in the left-right direction (28). A), (28 B). Partition wall (24) -25- 1304126 The lower end of the correction page protrudes below the lower end of the front and rear walls (23) and protrudes downward from the lower edge of the front and rear sides at a certain interval in the left-right direction. It can be embedded in a plurality of convex portions (24a) of the through holes (22) of the first member (14). The raised portion (24a) is formed by cutting a predetermined portion of the dividing wall (24). Each of the covers (16) and (17) is formed by pressing, forging, cutting, or the like of the bare material, and the first and second members (14) and (15) are embedded in the left and right directions. The concave ends of the left and right ends. A refrigerant inlet (17a) that can pass into the refrigerant inlet header (5) and a shunt blocking plate that can pass into the refrigerant outlet header (6) are formed on the right side cover (17). ) The upper part of the refrigerant outlet (i7b). Further, on the right side cover (17), aluminum having a refrigerant inlet (29 a) which can pass to the refrigerant inlet (17a) and a refrigerant outlet (29b) which can pass to the refrigerant outlet (17b) are welded. The refrigerant enters and exits the member (29). Then, the boss portion (24a) of the second member (15) is inserted into the through hole (22) of the first member (14), and the two members (14) and (15) are tightened so as to be in the first! The upper end faces of the front and rear side walls (18a) of the member (14) are in close contact with the lower end faces of the front and rear walls (23) of the second member (15), and the inner faces of the front and rear faces of the side walls (18a) are also in contact with the tubes. In a state in which the support ribs (26) are outward in the front-rear direction, the slats of the first member (14) are welded to each other, and the two covers (16) and (17) are also welded by a plate-shaped material. In the first and second members (14) and (15), the refrigerant inlet/outlet side tank (2) can be formed, and the second member (15) is a refrigerant inlet in front of the partition wall (24). The header (5) becomes a refrigerant outlet header (6) at the rear side of the partition wall (24). Further, the refrigerant outlet header (6) is divided into upper and lower spaces (6a) and (6b) by the flow dividing block (27), and the two spaces (6a) and (6b) are refrigerant flow holes ( 28A), (28B) are connected. Right -26-

Amendment page 1304126 The refrigerant outlet (17b) of the side cover (17) is open to the upper space (6a) of the refrigerant outlet header (6).

As shown in Fig. 5 and Fig. 7, the refrigerant turning side tank (3) is formed by an aluminum brazing sheet having a tantalum layer on both sides thereof and connected to the heat exchange tube (9). a member (3 1 ); a second member (32) composed of a bare material formed of an aluminum extruded material and covering the lower side of the first member (31); and an aluminum cover closing the left and right openings ( 33).

The top surface (3a) of the refrigerant turning side box (3) is the highest position (34) at the center portion in the front-rear direction, and gradually decreases from the highest position (34) to the front and rear sides, and is overall The upper surface is formed into a circular cross section. In the front and rear side portions of the refrigerant turning side box (3), the interval between the left and right directions is extended from the front and rear sides of the topmost portion (3 4) of the top surface (3 a) to the front and rear sides (3 b The majority of the slots (3 5 ).

The first member (31) has a central portion in the front-rear direction and has a circular cross-sectional shape that protrudes upward. On the front and rear side edges thereof, there is a hanging wall (3 la) which is integrated with the entire length. Then, the upper surface of the first member (3 1) serves as the top surface (3 a) of the refrigerant turning side case (3), and the outer surface of the hanging wall (3 la) serves as the front and rear side faces (3b) of the refrigerant turning side case (3). On the front and rear sides of the first member (31), a groove (35) is formed from the highest position (34) in the center in the front-rear direction to the lower end of the hanging wall (3la). The adjacent grooves (35) of the front and rear portions of the first member (3 1) except for the highest position portion (34) at the center of the front and rear are formed to have a longer diameter in the front-rear direction. The tube is inserted through the hole (3 6). The front and rear tube insertion holes (36) are in the same position in the left and right direction. In the highest position (34) of the center of the first member (31) in the front-rear direction, a plurality of through holes (37) are formed in the left-right direction with a distance of -27 - 1304126. The first member is formed by pressing of an aluminum brazing sheet and simultaneously forming a hanging wall (3 la), a groove (35), a pipe insertion hole (36), and a through hole (37). The second member (32) is a W-shaped cross section having an opening above it, and includes a front wall that is bent upward in the front-rear direction and extends in the left-right direction (3 8); a central portion between the two walls (38) extending in the left-right direction, and the refrigerant is turned into the vertical partition wall (39) of the front and rear spaces in the side box (3); and the front and rear walls are respectively 3 8) And the two connecting walls (4 1 ) in which the lower ends of the partition walls (39) are integrally connected to each other. The front and rear edge portions of the second member (32), that is, the upper edge portions of the front and rear walls (38) are integrated into the headers (7) and (8) integrally with the entire length. The tube supports the protrusions (42) protruding from the side of the first member (31) (upper side). The upper end of the partition wall (39) protrudes above the upper end of the tube support rib (42), and is formed integrally with the upper end of the tube support rib (42) at a certain interval, and protrudes upward to be embedded therein. A plurality of convex portions (39a) of the through holes (37) of the first member (31). Further, between the adjacent convex portions (39a) on the partition wall (39), a refrigerant passage groove (39b) is formed from the upper edge thereof. The raised portion (39a) and the recessed portion (39b) are formed by cutting a predetermined portion of the partition wall (39). The second member (32) is formed by integrally extruding the front and rear walls (38), the partition wall (39), the connecting wall (41), and the tube supporting rib (42), and then cutting off the partition of the predetermined portion. The wall (39) is formed by forming a boss (39a) and a groove (39b). Each of the lids (33) is formed by pressing, forging, cutting, or the like of the bare material, and the left and right sides of the first and second members (31) and (32) are formed in the left and right directions. The recess of the end. -28- 1304126 2 ;? V t;. ·» < L.*. j..+;

Hi correction page

Then, the boss portion (39a) of the second member (32) is inserted into the through hole (37) of the first member (31), and the two members (31) and (32) are tightened. The lower end surfaces of the front and rear hanging walls (31a) of the first member (31) are in close contact with the upper end faces of the front and rear walls (38) of the second member (32), and at the same time, the front and rear directions of the two hanging lower walls (31a) The inner surface is also in contact with the outer surface of the tube support rib (42) in the front-rear direction, and the first member (31) is welded to each other, and the two covers (33) are also made of a plate-shaped solder. The first and second members (31) and (32) are welded to form a refrigerant turning side tank (3), and the second member (32) is a refrigerant inflow side before the partition wall (39). The side header (7) is a refrigerant outflow side header (8) at the rear side of the partition wall (39). The upper end opening of the recess (39b) of the partition wall (39) of the second member (32) is closed by the first member (31), thereby forming a refrigerant flow hole (43).

The heat exchange tube (9) constituting the heat exchange tube group (11) before and after is formed of an aluminum extruded material, and is formed into a flat shape having a wide front and rear direction, and is formed in a side-by-side shape in the length thereof. Most of the refrigerant passages extend in the direction. The upper end of the heat exchange tube (9) is inserted into the tube insertion hole (19) of the first member (14) of the refrigerant inlet and outlet side tank (2), and the upper end surface thereof is placed against the tube support rib ( In the state of 26), the first member (14) is welded to the first member (14) by the buckling layer of the first member (14), and the lower member is inserted into the first member (3) of the refrigerant turning side case (3). 1) The tube is inserted into the through hole (36), and the lower end surface is placed against the tube support rib (42), and the first member (31) is used to weld the first member (31). 1 member (31). Furthermore, the heat exchange tube (9) can also be used to insert a tube fin inside the electric welding aluminum tube to form a plurality of refrigerant passages instead of the aluminum extrusion -29- 1304126" S ο "c., ' 4 ι 4 Amendment page one.. 'One.......

Forming pipe material. Further, it is also possible to use a method of applying a rolling process to the side of the buckling layer of the aluminum brazing sheet having the bucking layer on one side thereof, and providing two flat wall forming portions connected by the connecting portion; Each of the flat wall forming portions is formed by a convex side wall forming portion integrally formed with a side edge on the opposite side of the connecting portion; and is integrally formed from the two flat wall forming portions at a predetermined interval in the width direction of the flat wall forming portion. The plate-like portion of the plurality of partition wall forming portions is formed by bending the joint portion into a U shape, and the side wall forming portions are butted against each other and welded to each other, and the partition wall forming portion is formed as a partition wall. The wave fin (12) is formed of a brazing sheet formed of an aluminum brazing sheet having a tantalum layer on both sides. In the connection portion connecting the crest portion and the trough portion, a plurality of heat dissipating patches which are arranged side by side are formed in the front and rear directions. The wave fin (12) is shared by the front and rear heat exchange tubes (11), and the width in the front-rear direction is the heat from the front side to the rear side of the heat exchange tube (9) of the front heat exchange tube group (11). The distance between the side edges of the heat exchange tubes (9) of the exchange tube group (11) is substantially the same. In the evaporator (1), the surface potential of the outer surface of the heat exchange tube (9) from the outermost surface to the depth d (= 0.15) mm is A, and the heat exchange tube (9) is a portion other than the surface portion. The potential of the core is B, the potential of the heat sink (12) is C, and the fillet potential is D when the heat exchange tube (9) and the wave fin (12) are welded to each other. In the same manner as in the case of the condenser (50) described above, it becomes ASCSD < B, and becomes potential A: -850.

~- 800mV, potential B: -710 ~ - 670mV, potential C: -850--800mV, potential D: -850~- 800mV. Further, the alloy component of the surface layer portion and the core portion of the heat exchange tube (9) and the alloy component of the wave fin (12) are the refrigerant flow tube (53) of the condenser of the -30-1304126 (50) and The waveform heat sink (54) is the same. Further, the rounded alloy component formed in the welded portion of the heat exchange tube (9) and the wave fin (12) is also formed in the welded portion of the refrigerant flow tube (53) and the wave fin together with the condenser (50). The fillet (5 9) is the same. The evaporator (1) is a combination of the constituent members and the positioning and lap welding, and the entire constituent members are welded together. At this time, the heat exchange pipe is the same as the case where the refrigerant flow pipe (60) forming the condenser (50) described above is a tubular body and a Zri heat spray formed on the outer periphery of the tubular body and covering the outer surface thereof. Made of plating. The alloy component of the tubular body and the amount of the Zn thermal spray coating # are the same as the refrigerant flow pipe (60) of the condenser (50). Further, the wave-shaped heat dissipating sheet is composed of a core material and a skin material covering both surfaces of the core material, similarly to the above-described corrugated heat-dissipating sheet (61) forming the condenser (50). The alloy composition of the core material and the skin material and the coverage of the skin material are the same as those of the waveform heat dissipation sheet (6 1 ) of the condenser (50). The evaporator (1) is a refrigeration cycle in which a refrigerant is used together with a compressor and a condenser, and is mounted on, for example, an automobile in the form of a vehicle air conditioner. In the above two embodiments, the heat exchanger according to the present invention is a vehicle air conditioner having a compressor, a condenser, an evaporator, and a freon-based refrigerant, which is prepared on a motor vehicle. In the device, it is used as a stomach suspect and evaporator, but it is also used as an oil cooler or a water tank stomach | ^ In the case of a car. Further, the heat exchanger according to the present invention is provided on a vehicle, for example, a vehicle, having a compressor, a gas cooler, an intermediate heat exchanger, a -31-1304126 expansion valve, and an evaporator, and using co2 In a refrigerant vehicle air conditioner, it is used as a gas cooler or evaporator. [Industrial Applicable Scope] The heat exchanger of the present invention is suitable for use as, for example, a condenser or an evaporator of a vehicle air conditioner using a Freon-based refrigerant. Further, the heat exchanger tube and the heat exchanger sheet for a heat exchanger according to the present invention are suitable for use in a condenser or an evaporator for producing a vehicle air conditioner using, for example, a Freon-based refrigerant. (5) [Simplified description of the drawings] Fig. 1 is a perspective view showing a condenser for a vehicle air conditioner to which the present invention is applied. Fig. 2 is an enlarged cross-sectional view showing a welded portion of a refrigerant flow pipe and a wave fin in the condenser of Fig. 1. Fig. 3 is an enlarged cross-sectional view showing the pipe material and the heat radiating sheet before welding in the manufacturing process of the condenser for a vehicle air conditioner. Fig. 4 is a perspective view showing a partial slit in the overall configuration of a condenser for a vehicle air conditioner to which the present invention is applied. Fig. 5 is a vertical sectional view showing a part of the same evaporator for an air conditioner for a vehicle. Fig. 6 is an exploded perspective view showing the refrigerant inlet/outlet side tank of the evaporator for a vehicle air conditioner. Fig. 7 is an exploded perspective view of the refrigerant turning side tank of the evaporator for a vehicle air conditioner. [Description of representative symbols of main part] 1 Evaporator -32- 1304126 2 Refrigerant 3 Refrigerant 3 a Top surface 3b Front and rear 4 Heat exchange 5 Refrigerant 6 Refrigerant 6 a Upper part 6b Lower part 7 Refrigerant 8 Refrigerant 9 Heat exchange 11 Heat exchange 12 Waveform 13 Side plate 14 1 15 2nd 16th, 17 cover side box side box side side change core part inlet header box outlet header space space inflow side header box outflow side header box change tube change group heat sink member member

17a Refrigerant inlet 17b Refrigerant outlet 18 Bending 18a Side wall 19 Pipe insertion hole 2 1 Flat part -33 1304126 22 Beacon hole 23 Front and rear walls 24 Partition wall 24a Raised portion 25 Connecting wall 26 Tube support rib 27 Separation Barrier plates 28A, 28B Refrigerant passage holes 29 Refrigerant inlet and outlet member 29a Refrigerant inflow □ 29b Refrigerant outflow □ 3 1 1st member 3 1a Down wall 32 2nd member 3 3 Cover 34 Most local part 3 5 Slot 3 6 Tube insertion hole 3 7 through hole 3 8 刖 rear wall 3 9 partition wall 3 9a boss 3 9b groove 4 1 connecting wall

-34- 1304126 42 Tube support ribs 43 Refrigerant passage hole 50 Condenser 5 1 1st header 5 2 2nd header 53 Refrigerant flow tube (heat exchange tube) 5 3a Surface part 53b Core

54 Waveform heat sink 5 5 Inlet pipe 56 Outlet pipe 5 7 First baffle 5 8 Second baffle 5 9 . Fillet 60 Refrigerant flow pipe

60a tubular body 60b Zn thermal spray coating 6 1 corrugated heat sink sheet 6 1a core material 6 1b leather material -35-

Claims (1)

1304126 ^3⁄423⁄4 Repair (more) original 921 299 83 "Manufacturing methods for heat exchangers, heat exchanger tubes, heat exchanger fins and heat exchangers" (Amended on March 20, 2008) Patent application scope: 1. A heat exchanger comprising a heat exchange tube and a heat sink welded to the heat exchange tube, wherein: a potential portion of a surface portion of the outer surface of the heat exchange tube is A, and a surface portion of the heat exchange tube When the potential of the other portion is B, the potential of the heat sink is C, and the potential of the fillet formed at the welded portion of the heat exchange tube and the heat sink is D, the relationship of these potentials at the potential is ASC^D<B . 2. The heat exchanger according to claim 1, wherein the potential of the surface portion of the outer surface of the heat exchange tube is: _850 to -800 mV, and the potential of the portion other than the surface portion of the heat exchange tube is B: -710~ -6 7 0m V , the potential of the heat sink C: -850~-8 00mV, the potential of the fillet formed at the welded portion of the heat exchange tube and the heat sink D: -850~-800mV. 3. The heat exchanger according to claim 1, wherein the surface portion of the outer surface of the heat exchange tube is made of Cu 0.3 to 6.6 mass%, Μη 0.1 to 0.4 mass%, and Ζη 1.0 to 7.5 mass. %, the remainder is formed by Α1 and an alloy of Α1 which cannot be avoided by impurities; the portion other than the surface portion of the heat exchanger contains 0.3 to 0.6% by mass of Cu, 0.1 to 0.4% by mass of Μη, and the remainder is A1 and It is impossible to avoid the formation of the A1 alloy composed of impurities; the heat sink is composed of Ζη 0.9 to 2.8% by mass, Μη1 · 0 to 1 · 5 mass%, cu 0 · 15 mass% or less, and the remainder is Α1 and cannot be avoided. The Α1 alloy composed of impurities is formed; and the rounded corner formed in the welded portion of the heat exchange tube and the heat sink is composed of 1304126 f Cu 0.1 to 0.4% by mass, Μη 0·05 〜0.3% by mass, Zn 5 The mass% or less, the remainder is A1 and the A1 alloy composed of impurities cannot be avoided. 4. The heat exchanger according to claim 3, wherein the surface portion of the outer surface of the heat exchanger is composed of 0.3 to 0.5% by mass of Cu, 0.1 to 0.3% by mass of Mn, and 2.0 to 3.0% by mass of Zn. The remainder is formed by A1 and the A1 alloy which cannot avoid impurities. 5. The heat exchanger according to claim 3, wherein the portion other than the surface portion of the heat exchange tube contains Cu0.3 to 0.5 mass%, Μη 0·1 to 0.3 mass%, The remainder is formed by A1 and an alloy of Α1 composed of unavoidable impurities. < 6 The heat exchanger according to claim 3, wherein the heat sink is composed of Zn 2.0 to 2.5% by mass, Μη 1.1 to 1.3% by mass, and Cu 0.1% by mass or less, and the remainder is Α1 and cannot Avoid the formation of the A1 alloy composed of impurities. 7. The heat exchanger according to item 3 of the patent application, wherein the fillet formed in the welded portion of the heat exchange tube and the heat sink is 0.2 to 0.3% by mass of Cu, Μη 0.1 to 0.2% by mass, Zn 3 mass% or less 'The remainder is A1 and the A1 alloy composed of impurities cannot be avoided. 8: a heat exchanger pipe used for manufacturing a heat exchanger having a heat exchange tube and a heat sink welded to a heat exchange tube, wherein: a mass of 0.3 to 0.6 mass% Cu, Μη 0.1 to 0.4 %, the remaining part is Α1 and the tube formed of the A1 alloy which cannot be avoided by the impurity - 2- 1304126 material body, and 2~8g/ formed on the outer periphery of the main body of the pipe and covering the outer surface of the pipe The m2 Zn thermal spray coating is composed of. 9. The heat exchanger tube according to item 8 of the patent application, wherein the main body of the pipe is made of a ruthenium alloy containing 0.3 to 0.5% by mass of Cu, 0.1 to 0.3% by mass of Μη, and the remainder being Α1 and unavoidable impurities. Formed by. 10. The heat exchanger tube according to the eighth aspect of the invention, wherein the Zn thermal spray coating has a thermal spray amount of 2 to 6 g/m2. #11 A heat-dissipating sheet for a heat exchanger, which is used for manufacturing a heat-dissipating sheet having a heat exchange tube and a heat exchanger welded to a heat-dissipating fin of a heat exchange tube, wherein the heat-dissipating sheet contains Ζη 0·9 to 2.8% by mass Μη 1.0 to 1.5% by mass, the remainder being 芯1 and a core material formed of the Α1 alloy which is inevitably composed of impurities, and covering at least one side of the core material, containing Cu 0.1 to 0.4% by mass, Μη 0.1 to 0 · 3 mass%, the remainder is A1 and the skin material formed by the Α1 alloy slag composed of impurities cannot be avoided. ^ 1 2 · The heat-dissipating heat-dissipating sheet of the heat exchanger according to the first aspect of the patent application, wherein the core material contains Ζη 2·3 to 2.7% by mass, Μη 1.1 to 1.3% by mass, the remainder is Α1 and impurities are unavoidable The formed A1 alloy is formed. 1 3 The heat-dissipating heat-dissipating sheet of the heat exchanger according to the first aspect of the patent application, wherein the skin material is composed of 0.1 to 0.3% by mass of Cu, 0.1 to 0.3% by mass of Μη, and the remainder is Α1 and impurities are unavoidable. The A1 alloy is formed by the material. 3- 1304126 1 4 . The heat-dissipating heat-dissipating sheet for heat exchangers of claim 1 , wherein the coverage of the leather material on one side of the core material is 8 to 12%. 1 5 . The heat-dissipating heat-dissipating sheet for a heat exchanger according to the first aspect of the patent application, wherein the coverage of the leather material on one side of the core material is 9 to 11%. 16. A method of manufacturing a heat exchanger, characterized in that: the heat sink sheet for heat exchanger according to any one of claims 1 to 15 is welded to the eighth to tenth claims of the patent application. A heat exchanger pipe. 17. A vehicle for a vehicle air conditioner having a compressor, a condenser, and an evaporator and using a Freon-based refrigerant, wherein the condenser is heat exchanged according to any one of claims 1 to 7. The body of the device. 18. A vehicle for a vehicle air conditioner having a compressor, a condenser, and an evaporator and using a Freon-based refrigerant, wherein the evaporator is heat exchanged according to any one of claims 1 to 7. The body of the device. -4- III I Si ili Ill __ 8 Fill III! ^11 Λ 1304126 Figure 2 Figure 3 1304126 Factory -. - word · >1 (more) positive replacement page Figure 4 1304126 Pen, he (more) is replacing page Figure 5 -5- - 6-