CN105318766A - Microchannel flat pipe production method, microchannel flat pipe and microchannel heat exchanger - Google Patents
Microchannel flat pipe production method, microchannel flat pipe and microchannel heat exchanger Download PDFInfo
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- CN105318766A CN105318766A CN201410276885.8A CN201410276885A CN105318766A CN 105318766 A CN105318766 A CN 105318766A CN 201410276885 A CN201410276885 A CN 201410276885A CN 105318766 A CN105318766 A CN 105318766A
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Abstract
The invention provides a microchannel flat pipe production method. The method comprises the steps: 1) selecting a single plate and spraying soldering flux on the surface of the single plate; 2) symmetrically folding the single plate to form a double-row flat pipe, wherein the double-row flat pipe comprises two single-row flat pipes and a connecting bridge connected with the two single-row flat pipes, and each single-row flat pipe is divided into a plurality of microchannels by a plurality of microchannel partitions; 3) cutting and forming abdicating notches at the two ends of the connecting bridge; 4) performing high-temperature welding combination of the microchannel partitions and the inner walls of the single-row flat pipe through soldering flux, and obtaining a microchannel flat pipe. According to the microchannel flat pipe production method, the single plate is symmetrically folded to form the double-row flat pipe, the abdicating notches are formed in the connecting bridge of the double-row flat pipe, and thus the microchannel flat pipe is acquired. Since the single plate is stable in performance and is high in surface material consistency after being folded, the quality is stable, the quality of the microchannel flat pipe is improved effectively, and the service life of the microchannel flat pipe is prolonged. The invention further provides a microchannel flat pipe and a microchannel heat exchanger.
Description
Technical field
The present invention relates to micro-channel flat technical field, more particularly, relate to a kind of micro-channel flat production method, micro-channel flat, micro-channel heat exchanger.
Background technology
Micro-channel heat exchanger is lightweight by it, volume is little, heat exchange property advantages of higher is widely used gradually, such as field of air conditioning.Micro-channel heat exchanger mainly comprises: header, the micro-channel flat that two ends are communicated with header, strengthens the fin of heat exchange.
At present, the micro-channel flat that the micro-channel heat exchanger being applied to air-conditioning adopts is extrusion pressing type flat tube, but, extrusion pressing type flat tube is when extruded, more easily occur the phenomenons such as material skewness, impurity, bubble, cause micro-channel flat quality lower, service life is shorter.
In sum, how improving the quality of micro-channel flat, to improve its service life, is current those skilled in the art's problem demanding prompt solution.
Summary of the invention
The object of this invention is to provide a kind of micro-channel flat production method, improve the quality of micro-channel flat, to improve its service life.Another object of the present invention is to provide a kind of micro-channel flat and has the micro-channel heat exchanger of this micro-channel flat.
To achieve these goals, the invention provides following technical scheme:
A kind of micro-channel flat production method, comprises step:
1) individual plates is chosen, the surface spraying fluxing agent of described individual plates;
2) individual plates described in symmetrical fold forms double flat tube, and described double flat tube comprises: two single flat tubes and the connecting bridge being connected two described single flat tubes, and described single flat tube is some microchannels by a plurality of microchannels baffle for separating;
3) to step down breach in the cutting installation of the two ends of described connecting bridge;
4) described microchannel dividing plate is combined by described scaling powder high-temperature soldering with the inwall of described single flat tube, obtains micro-channel flat.
Preferably, in above-mentioned micro-channel flat production method, described step 2) in individual plates described in symmetrical fold be specially: fold described individual plates from the centre of described individual plates to its bilateral symmetry.
Preferably, in above-mentioned micro-channel flat production method, described step 3) in the described installation of cutting step down after breach and also comprise step:
The port of described single flat tube is made convergent mouth, and to its opening convergent.
Preferably, in above-mentioned micro-channel flat production method, described step 3) in the described installation of cutting step down after breach and also comprise step: in described connecting bridge, offer through hole.
Preferably, in above-mentioned micro-channel flat production method, described step 3) in, cut described installation breach of stepping down at the two ends of described connecting bridge and specifically comprise step:
From the two ends of described connecting bridge, along the medium line cutting preset length of described connecting bridge, then cut along the straight line perpendicular to the medium line of described connecting bridge, form flange;
By described flange to coupled described single flat tube turnup, and be fixed on described single flat tube.
Micro-channel flat production method provided by the invention, symmetrical fold individual plates forms double flat tube, arrange installation in the connecting bridge of double flat tube to step down breach, thus acquisition micro-channel flat, extruded acquisition micro-channel flat is adopted to compare compared with prior art, the performance of individual plates is comparatively stable and Facing material uniformity is stronger after folding, quality is more stable, there will not be the phenomenons such as material skewness, impurity, bubble, effectively improve the quality of micro-channel flat, thus improve the service life of micro-channel flat.
Based on the above-mentioned micro-channel flat production method provided, present invention also offers a kind of micro-channel flat, described micro-channel flat is folded into integral structure by individual plates symmetrical expression, and described micro-channel flat comprises: two single flat tubes, connects the connecting bridge of two described single flat tubes; Wherein, described single flat tube has some microchannels, and the two ends of described connecting bridge have installation and to step down breach, and the both sides of described individual plates are coated with scaling powder.
Preferably, in above-mentioned micro-channel flat, described connecting bridge offers through hole.
Preferably, in above-mentioned micro-channel flat, described microchannel comprises: the edge channel in both sides and the center-aisle between two described edge channels; U-shaped or the V-type of described center-aisle.
Preferably, in above-mentioned micro-channel flat, the port of described single flat tube is convergent mouth, and to its opening convergent.
Based on the above-mentioned micro-channel flat provided, present invention also offers a kind of micro-channel heat exchanger, this micro-channel heat exchanger comprises: micro-channel flat, the header be communicated with the two ends of described micro-channel flat; Wherein, described micro-channel flat is the micro-channel flat described in above-mentioned any one.
Accompanying drawing explanation
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, be briefly described to the accompanying drawing used required in embodiment or description of the prior art below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The schematic diagram of the micro-channel flat production method that Fig. 1 provides for the embodiment of the present invention;
The first structural representation of the micro-channel flat that Fig. 2 provides for the embodiment of the present invention;
Fig. 3 is the top view of micro-channel flat in Fig. 2;
Fig. 4 is the enlarged diagram of part A in Fig. 3;
The second structural representation of the micro-channel flat that Fig. 5 provides for the embodiment of the present invention;
The third structural representation of the micro-channel flat that Fig. 6 provides for the embodiment of the present invention;
The structural representation that in the micro-channel flat that Fig. 7 provides for the embodiment of the present invention, microchannel is V-shaped;
The structural representation that in the micro-channel flat that Fig. 8 provides for the embodiment of the present invention, microchannel is U-shaped;
The structural representation of the micro-channel heat exchanger that Fig. 9 provides for the embodiment of the present invention.
In upper Fig. 1-9:
1 for individual plates, 2 for single flat tube, 21 for convergent mouth, 22 for microchannel, 3 for connecting bridge, 31 for installation step down breach, 32 for through hole, 4 for header, 41 for import, 42 for outlet, 5 be fin.
Detailed description of the invention
Embodiments provide a kind of micro-channel flat production method, improve the quality of micro-channel flat, thus improve the service life of micro-channel flat.
Below in conjunction with the accompanying drawing in the embodiment of the present invention, be clearly and completely described the technical scheme in the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
As shown in Figure 1, the micro-channel flat production method that the embodiment of the present invention provides, specifically comprises step:
S01: choose individual plates 1, the surface spraying fluxing agent of this individual plates 1:
The size of individual plates 1 needs to select according to the size of required micro-channel flat.The material of individual plates 1 is selected according to the performance of micro-channel flat.In order to improve the performance of micro-channel flat, prioritizing selection individual plates 1 is clad aluminium.Certainly, individual plates 1 also can be selected to be the plate of other materials, and such as aluminium sheet, copper coin etc., as long as the instructions for use that can meet micro-channel flat.At the surface spraying scaling powder of individual plates 1, provide prerequisite for sequential folds individual plates 1 forms double flat tube.For the type of scaling powder, can select according to actual needs, the embodiment of the present invention does not limit this.
S02: symmetrical fold individual plates 1 forms double flat tube, double flat tube comprises: two single flat tubes 2 and the connecting bridge 3 being connected two single flat tubes 2, and single flat tube 2 is some microchannels 22 by a plurality of microchannels baffle for separating:
Symmetrical fold individual plates 1 forms double flat tube, there are two kinds of folding directions, a kind of for fold from the intermediate symmetry of two side direction individual plates 1 of individual plates 1, and another kind is fold to the bilateral symmetry of individual plates 1 from the centre of individual plates 1.For the ease of folding, prioritizing selection folds individual plates 1 from the centre of individual plates 1 to its bilateral symmetry.Also there is multiple folding method in such folding direction.In Fig. 7, three kinds of folding methods are enumerated for the single flat tube 2 on the right, the first folding method is: first upwards roll over individual plates 1 in the centre position of individual plates 1, then accordion partition successively after horizontal-extending predeterminable range, after dividing plate has folded, downward folding individual plates 1 is horizontal-extending predeterminable range also, finally upwards rolls over individual plates 1, forms the single flat tube 2 closed; The second folding method is: first roll over individual plates 1 downwards in the centre position of individual plates 1, then after horizontal-extending predeterminable range, upwards roll over individual plates 1, accordion partition successively again, after dividing plate has folded, upwards roll over single plate and horizontal-extending predeterminable range, the last individual plates 1 of folding downwards, forms the single flat tube 2 closed; The third folding method is: start accordion partition from the centre position of individual plates 1, after dividing plate has folded, downward folding individual plates 1 also extends horizontally to the original position of dividing plate, then upwards roll over individual plates 1 and extend horizontally to the final position of dividing plate, the last individual plates 1 of folding downwards, forms the single flat tube 2 closed; 4th kind of folding method is: first upwards roll over individual plates 1, the then backward lower folding individual plates 1 of horizontal-extending predeterminable range in the centre position of individual plates 1, and horizontal-extending predeterminable range, more upwards roll over individual plates 1 accordion partition successively, form the single flat tube 2 closed.For the ease of ensuring the quality of products, prioritizing selection the 4th kind folding method, the single flat tube 2 obtained by the 4th kind of folding method only has an aluminium sheet contact point GAP, and after welding, risk of leakage is less, the single flat tube 2 that its excess-three kind folding method obtains has two contact point GAP, and after welding, risk of leakage is larger.
Be understandable that, due to the existence of connecting bridge 3, the centre of individual plates 1 refers to the mesozone of individual plates 1, i.e. connecting bridge 3.When microchannel 22 number is different, folding method also can change accordingly, is not limited to above-mentioned four kinds of folding methods.For microchannel 22 number of single flat tube 2, can arrange according to actual needs, the embodiment of the present invention does not limit this.
S03: to step down breach 31 in the cutting installation of the two ends of connecting bridge 3:
In order to ensure that micro-channel flat can be connected with header 4, need the two ends cut-out in connecting bridge 3, namely to step down breach 31 in the cutting installation of the two ends of connecting bridge 3, thus ensure that the single flat tube 2 of micro-channel flat inserts in header 4, so that realize being tightly connected of micro-channel flat and header 4.
S04: microchannel dividing plate is combined by scaling powder high-temperature soldering with the inwall of single flat tube 2, obtains micro-channel flat:
It should be noted that, scaling powder is the spray liniment on individual plates surface, and scaling powder is present in the inwall of micro-channel flat 2 and the surface of microchannel dividing plate.
The micro-channel flat production method that the embodiment of the present invention provides, symmetrical fold individual plates 1 forms double flat tube, arrange installation in the connecting bridge 3 of double flat tube to step down breach 31, thus acquisition micro-channel flat, extruded acquisition micro-channel flat is adopted to compare compared with prior art, the performance of individual plates 1 is comparatively stable and Facing material uniformity is stronger after folding, quality is more stable, there will not be the phenomenons such as material skewness, impurity, bubble, effectively improve the quality of micro-channel flat, thus improve the service life of micro-channel flat.
Meanwhile, the micro-channel flat production method that the embodiment of the present invention provides, more simply, effectively improves the production efficiency of micro-channel flat; Adopt individual plates 1 to be made, also comparatively save material; And dividing plate is identical with the material of single flat tube 2, quality is more stable, and service life is longer.
It should be noted that, dividing plate is connected by scaling powder high-temperature soldering with the inwall of single flat tube 2, and in folding process, other junction is also by scaling powder high-temperature soldering.
For the ease of the use of micro-channel flat, in the micro-channel flat production method that above-described embodiment provides, cut installation in step S03 and step down after breach 31 and also comprise step: the port of single flat tube 2 is made convergent mouth 21, and convergent mouth 21 is to its opening convergent.Like this, the port of single flat tube 2 is convergent mouth 21, is convenient to single flat tube 2 to be inserted in header 4, thus facilitates the use of micro-channel flat.For the shrinkage degree of convergent mouth 21, need to arrange according to actual needs, the embodiment of the present invention does not limit this.
Micro-channel flat is distributed between two headers 4 usually side by side, and multiple micro-channel flat distributes up and down, if the medium in air and micro-channel flat carries out heat exchange, then two adjacent micro-channel flat limit the other side's heat radiation.Preferably, above-described embodiment provides in micro-channel flat production method, cuts installation and steps down after breach 31 and also comprise step: in connecting bridge 3, offer through hole 32 in step S03.Like this, change airflow direction, strengthen between air-flow and negotiate, add the heat exchange area between air and micro-channel flat, effectively improve heat exchange efficiency.The number of through hole 32 and large I are arranged according to actual needs.For the ease of arranging, can prioritizing selection through hole 32 be rectangle, circular, oval or rhombus.
In the micro-channel flat production method that above-described embodiment provides, to step down breach 31 in the cutting installation of the two ends of connecting bridge 3, there is various ways.As shown in Figure 1, prioritizing selection is from the two ends of connecting bridge 3, and the medium line L1 along connecting bridge 3 cuts preset length, then cuts along the straight line L2 perpendicular to the medium line L1 of connecting bridge 3, forms flange; By flange to coupled single flat tube 2 turnup, and be fixed on single flat tube 2.
Based on the micro-channel flat production method that above-described embodiment provides, the embodiment of the present invention additionally provides a kind of micro-channel flat, as illustrated in figs. 2 through 8, micro-channel flat is folded into integral structure by individual plates 1 symmetrical expression, micro-channel flat comprises: two single flat tubes 2, connects the connecting bridge 3 of two single flat tubes 2; Wherein, single flat tube 2 has some microchannels 22, and the two ends of connecting bridge 3 have installation and to step down breach 31, and the both sides of individual plates 1 are coated with scaling powder.
The micro-channel flat that the embodiment of the present invention provides, integral structure is folded into by individual plates 1 symmetrical expression, the two ends of connecting bridge 3 have installation and to step down breach 31, thus acquisition micro-channel flat, extruded acquisition micro-channel flat is adopted to compare compared with prior art, the performance of individual plates 1 is comparatively stable and Facing material uniformity is stronger after folding, quality is more stable, there will not be the phenomenons such as material skewness, impurity, bubble, effectively improve the quality of micro-channel flat, thus improve the service life of micro-channel flat.
Meanwhile, the micro-channel flat that the embodiment of the present invention provides, structure is comparatively simple, also comparatively saves material; And dividing plate is identical with the material of single flat tube 2, quality is more stable, and service life is longer.
, there are two kinds of folding directions in symmetrical fold individual plates 1, a kind of for fold from the intermediate symmetry of two side direction individual plates 1 of individual plates 1, and another kind is fold to the bilateral symmetry of individual plates 1 from the centre of individual plates 1.For the ease of folding, prioritizing selection folds to its bilateral symmetry from the centre of individual plates 1.Also there is multiple folding method in such folding direction.In Fig. 7, four kinds of folding methods are enumerated for the single flat tube 2 on the right, the first folding method is: first upwards roll over individual plates 1 in the centre position of individual plates 1, then accordion partition successively after horizontal-extending predeterminable range, after dividing plate has folded, downward folding individual plates 1 is horizontal-extending predeterminable range also, finally upwards rolls over individual plates 1, forms the single flat tube 2 closed; The second folding method is: first roll over individual plates 1 downwards in the centre position of individual plates 1, then after horizontal-extending predeterminable range, upwards roll over individual plates 1, accordion partition successively again, after dividing plate has folded, upwards roll over single plate and horizontal-extending predeterminable range, the last individual plates 1 of folding downwards, forms the single flat tube 2 closed; The third folding method is: start accordion partition from the centre position of individual plates 1, after dividing plate has folded, downward folding individual plates 1 also extends horizontally to the original position of dividing plate, then upwards roll over individual plates 1 and extend horizontally to the final position of dividing plate, the last individual plates 1 of folding downwards, forms the single flat tube 2 closed.For the ease of ensuring the quality of products, the first folding method of prioritizing selection; 4th kind of folding method is: first upwards roll over individual plates 1, the then backward lower folding individual plates 1 of horizontal-extending predeterminable range in the centre position of individual plates 1, and horizontal-extending predeterminable range, more upwards roll over individual plates 1 accordion partition successively, form the single flat tube 2 closed.For the ease of ensuring the quality of products, prioritizing selection the 4th kind folding method, the single flat tube 2 obtained by the 4th kind of folding method only has an aluminium sheet contact point GAP, and after welding, risk of leakage is less, the single flat tube 2 that its excess-three kind folding method obtains has two contact point GAP, and after welding, risk of leakage is larger.。
Be understandable that, due to the existence of connecting bridge 3, the centre of individual plates 1 refers to the mesozone of individual plates 1, i.e. connecting bridge 3.When microchannel 22 number is different, folding method also can change accordingly, is not limited to above-mentioned four kinds of folding methods.For microchannel 22 number of single flat tube 2, can arrange according to actual needs, the embodiment of the present invention does not limit this.
In order to effectively improve the heat exchange efficiency of micro-channel flat, in the micro-channel flat that above-described embodiment provides, connecting bridge 3 offers through hole 32.Like this, change airflow direction, strengthen between air-flow and negotiate, effectively increase the heat exchange area of air and micro-channel flat, thus improve the heat exchange efficiency of micro-channel flat.
The shape of microchannel 22 exists multiple, and for the ease of producing and manufacturing, in the micro-channel flat that above-described embodiment provides, microchannel 22 comprises: the edge channel in both sides and the center-aisle between two edge channels; U-shaped or the V-type of center-aisle.Be understandable that, when center-aisle is U-shaped, in two adjacent center-aisles, one is just U-shaped, and another is inverted U; When center-aisle is V-shaped, in two adjacent center-aisles, one is positive V-type, and another is reverse V-shaped.
For the ease of the installation of micro-channel flat, in the micro-channel flat that above-described embodiment provides, the port of single flat tube 2 is convergent mouth 21, and its opening convergent.Like this, convergent mouth 21, to the opening convergent of single flat tube 2 (or convergent mouth 21), facilitates and is inserted in header 4 by single flat tube 2, thus facilitate installation.For the convergent degree of convergent mouth 21, need to arrange according to actual needs, the embodiment of the present invention does not limit this.For the ease of the making of convergent mouth 21, in above-mentioned micro-channel flat, the tube wall of convergent mouth 21 is thinning gradually to its end face from the middle part of single flat tube 2.
Based on the micro-channel flat that above-described embodiment provides, the embodiment of the present invention additionally provides a kind of micro-channel heat exchanger, and as shown in Figure 9, this micro-channel heat exchanger comprises: micro-channel flat, the header 4 be communicated with the two ends of micro-channel flat; Wherein, micro-channel flat is the micro-channel flat described in above-described embodiment.
The micro-channel flat provided due to above-described embodiment has above-mentioned technique effect, the micro-channel heat exchanger that the embodiment of the present invention provides has above-mentioned micro-channel flat, the micro-channel heat exchanger that then embodiment of the present invention provides also has corresponding technique effect, repeats no more herein.
In order to improve heat exchange efficiency and be convenient to arrange condensed water, the micro-channel heat exchanger that above-described embodiment provides also comprises the fin 5 be arranged in micro-channel flat.For the ease of installing fin 5, prioritizing selection fin 5 is the double fin of integral type, and the double fin of this integral type is provided with the slot coordinated with micro-channel flat.
The installation method of the micro-channel heat exchanger that above-described embodiment provides is: first micro-channel flat inserted in the slot of townhouse fin, then is inserted in header 4 at the two ends of micro-channel flat, completes the assembling of this micro-channel heat exchanger finally by welding sequence.Be understandable that, micro-channel flat and header 4 are weldingly connected, and townhouse fin and micro-channel flat are weldingly connected.
Preferably, the micro-channel heat exchanger that above-described embodiment provides has two imports 41 and an outlet 42, and import 41 and outlet 42 are positioned at the homonymy of micro-channel flat.Certainly, micro-channel heat exchanger also can be selected to have an outlet 42 and an import 41, be not limited thereto.
To the above-mentioned explanation of the disclosed embodiments, professional and technical personnel in the field are realized or uses the present invention.To be apparent for those skilled in the art to the multiple amendment of these embodiments, General Principle as defined herein can without departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention can not be restricted to these embodiments shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (10)
1. a micro-channel flat production method, is characterized in that, comprises step:
1) individual plates (1) is chosen, the surface spraying fluxing agent of described individual plates (1);
2) individual plates described in symmetrical fold (1) forms double flat tube, described double flat tube comprises: two single flat tubes (2) and the connecting bridge (3) being connected two described single flat tubes (2), and described single flat tube (2) is some microchannels (22) by a plurality of microchannels baffle for separating;
3) to step down breach (31) in the cutting installation of the two ends of described connecting bridge (3);
4) described microchannel dividing plate is combined by described scaling powder high-temperature soldering with the inwall of described single flat tube (2), obtains micro-channel flat.
2. micro-channel flat production method according to claim 1, it is characterized in that, described step 2) in individual plates (1) described in symmetrical fold be specially: fold described individual plates (1) from the centre of described individual plates (1) to its bilateral symmetry.
3. micro-channel flat production method according to claim 1, is characterized in that, described step 3) in the described installation of cutting step down after breach (31) and also comprise step:
The port of described single flat tube (2) is made convergent mouth (21), and described convergent mouth (21) is to its opening convergent.
4. micro-channel flat production method according to claim 1, it is characterized in that, described step 3) in the described installation of cutting step down after breach (31) and also comprise step: in described connecting bridge (3), offer through hole (32).
5. according to the micro-channel flat production method in claim 1-4 described in any one, it is characterized in that, described step 3) in, cut described installation breach (31) of stepping down at the two ends of described connecting bridge (3) and specifically comprise step:
From the two ends of described connecting bridge (3), along the medium line cutting preset length of described connecting bridge (3), then cut along the straight line perpendicular to the medium line of described connecting bridge (3), form flange;
By described flange to coupled described single flat tube (2) turnup, and be fixed on described single flat tube (2).
6. a micro-channel flat, it is characterized in that, described micro-channel flat is folded into integral structure by individual plates (1) symmetrical expression, described micro-channel flat comprises: two single flat tubes (2), connects the connecting bridge (3) of two described single flat tubes (2); Wherein, described single flat tube (2) has some microchannels (22), and the two ends of described connecting bridge (3) have installation and to step down breach (31), and the both sides of described individual plates (1) are coated with scaling powder.
7. micro-channel flat according to claim 6, is characterized in that, described connecting bridge (3) offers through hole (32).
8. micro-channel flat according to claim 6, is characterized in that, described microchannel (22) comprising: the edge channel in both sides and the center-aisle between two described edge channels; U-shaped or the V-type of described center-aisle.
9. micro-channel flat according to claim 6, is characterized in that, the port of described single flat tube (2) is convergent mouth (21), and to its opening convergent.
10. a micro-channel heat exchanger, comprising: micro-channel flat, the header (4) be communicated with the two ends of described micro-channel flat; It is characterized in that, described micro-channel flat is for as the micro-channel flat in claim 6-9 as described in any one.
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| CN201410276885.8A CN105318766B (en) | 2014-06-19 | 2014-06-19 | Micro-channel flat production method, micro-channel flat, micro-channel heat exchanger |
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| CN109974346B (en) * | 2018-12-20 | 2024-05-28 | 上海加冷松芝汽车空调股份有限公司 | Heat exchanger |
| CN113758352A (en) * | 2020-06-05 | 2021-12-07 | 马勒国际公司 | Flat tube and heat exchanger with flat tube |
| DE102020207067A1 (en) | 2020-06-05 | 2021-12-09 | Mahle International Gmbh | Flat tube and heat exchanger with a flat tube |
| CN112680637A (en) * | 2020-12-30 | 2021-04-20 | 隆达铝业（烟台）有限公司 | Aluminum alloy ingot processing technology |
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| CN105318766B (en) | 2018-11-27 |
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