CN103837025A - Micro-channel heat exchanger - Google Patents
Micro-channel heat exchanger Download PDFInfo
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- CN103837025A CN103837025A CN201210484529.6A CN201210484529A CN103837025A CN 103837025 A CN103837025 A CN 103837025A CN 201210484529 A CN201210484529 A CN 201210484529A CN 103837025 A CN103837025 A CN 103837025A
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Abstract
The invention provides a micro-channel heat exchanger which comprises two flow collecting pipes, a plurality of first flat pipes and a plurality of second flat pipes. The second flat pipes are arranged alternatively and are overlapped in the thickness direction of the second flat pipes. Each flow collecting pipe is internally provided with a partition plate, wherein one partition plate divides the interior of the corresponding first flow collecting pipe into a first cavity and a first chamber, and the other partition plate divides the interior of the corresponding second flow collecting pipe into a second cavity and a second chamber. One end of each first flat pipe extends into the first cavity, and the other end of each first flat pipe extends into the second cavity. One end of each second flat pipe extends into the first chamber, and the other end of each second flat pipe extends into the second chamber. A first flow channel is commonly formed by the first cavity, the first flat pipes and the second cavity, and a second flow channel is commonly formed by the first chamber, the second flat pipes and the second chamber. The contact area of the first flat pipes and the second flat pipes is that of the flat plane in the width direction, the heat exchange surface of the single flat pipe occupies more than 80 percent of the total outer surfaces of the flat pipes, and the heat exchange efficiency is improved.
Description
Technical field
The invention belongs to technical field of heat exchangers, relate in particular to a kind of micro-channel heat exchanger.
Background technology
Often there will be the cold that cold-producing medium will be carried or heat to pass to the situation of other liquid working substances (water or oil) in fields such as refrigeration, chemical industry, power.In this case, conventionally adopt coaxial heat exchanger to carry out cold-producing medium and other liquid working substances carry out heat exchange.Coaxial heat exchanger primary structure is the outside that a bassoon 10 is enclosed within a tubule 11, and cold-producing medium is walked outside bassoon 10, and water or oil are walked intermediate tubule 11, and for increasing heat exchange area, middle tubule 11 is twisted into helical form conventionally, as shown in Figure 1.Tubule 11 inner region A are the runner of heat-exchange working medium water or oil, the runner that shadow region B between bassoon 10 and tubule 11 is cold-producing medium, obviously, the area that carries out heat exchange between region A and region B is only the exterior surface area of intermediate tubule 11, from scheming, can find out, refrigerant flow path region B has the area of nearly half not contact with heat-exchange working medium, and refrigerant flow path region not do not also have many thermal loss outside the area contacting with heat-exchange working medium, therefore the heat exchange efficiency between cold-producing medium and heat-exchange working medium is not high.
Summary of the invention
The object of the embodiment of the present invention is to provide a kind of micro-channel heat exchanger, is intended to solve the low problem of heat exchange efficiency of existing coaxial heat exchanger.
The embodiment of the present invention is to realize like this, a kind of micro-channel heat exchanger, the second header that it comprises the first header and is arranged side by side with described the first header, described micro-channel heat exchanger also comprises some the first flat tubes and some the second flat tubes that are connected between described the first header and described the second header, described the first flat tube and described the second flat tube are arranged alternately and stacking setting on its thickness direction, in described the first header, be provided with the first dividing plate, the inner space of described the first header is separated into the first cavity and the first chamber by described the first dividing plate, in described the second header, be provided with second partition, the inner space of described the second header is separated into the second cavity and the second chamber by described second partition, one end of each the first flat tube is stretched in the first cavity of described the first header, the other end of each the first flat tube stretches in the second cavity of described the second header, one end of each the second flat tube is stretched in the first chamber of described the first header, the other end of each the second flat tube stretches in the second chamber of described the second header, described the first cavity, the common first flow of using for the first Working fluid flow that forms of described the first flat tube and described the second cavity, described the first chamber, common the second runner used for the second Working fluid flow that forms of described the second flat tube and described the second chamber.
Further, the first cavity of described the first header is with respect to more close described second header of the first chamber of described the first header, and the second chamber of described the second header is with respect to more close described first header of the second cavity of described the second header.
Further, on the first dividing plate of described the first header, offer some the first through holes, described some the second flat tubes are arranged in respectively in described the first through hole, the exterior contour size of the cross section of each the second flat tube is consistent with the perforate size of corresponding the first through hole, on the second partition of described the second header, offer some the second through holes, described some the first flat tubes are arranged in respectively in described the second through hole, and the exterior contour size of the cross section of each the first flat tube is consistent with the perforate size of corresponding the second through hole.
Further, the first chamber of described the first header more leans on into described the second header with respect to the first cavity of described the first header, and the second chamber of described the second header is with respect to more close described first header of the second cavity of described the second header.
Further, on the first dividing plate of described the first header, offer some the first through holes, on the second partition of described the second header, offer some the second through holes, the opposite end of described some the first flat tubes is arranged in respectively in described the first through hole and described the second through hole, and the exterior contour size of the cross section of each the first flat tube is consistent with the perforate size of the perforate of described the first through hole size and described the second through hole.
Further, described the first header offers the first opening, described the second header offers the second opening, described the first opening is faced mutually with described the second opening, and the openings of sizes of described the first opening and described the second opening is consistent with the exterior contour size of the cross section of described the first flat tube and the common stacked structure forming of described the second flat tube.
Further, described the first header is profile piece, and described the second header is profile piece.
Further, described micro-channel heat exchanger also comprises first group of conduit and second group of conduit, described first group of conduit is connected with the first cavity and first chamber of described the first header respectively, and described second group of conduit is connected with the second cavity and second chamber of described the second header respectively.
Further, the opposite end of described the first header has sealed respectively two group of first blanking cover, the opposite end of described the second header has sealed respectively two group of second blanking cover, described first group of conduit need to be arranged on described the first blanking cover or described the first header according to using, and described second group of conduit need to be arranged on described the second blanking cover or described the second header according to using.
Further, described the first flat tube is identical with the cross-sectional structure of described the second flat tube, in described the first flat tube and described the second flat tube, is provided with heat transfer muscle.
The stacking setting on its thickness direction due to described the first flat tube and described the second flat tube, the area that the first flat tube contacts with the second flat tube is the flat horizontal surface on width, the first working medium and the second working medium are carried out heat exchange on flat horizontal surface, because the width of the first flat tube, the second flat tube is far longer than thickness, therefore, the ratio that the heat exchange surface of single flat tube accounts for the total outer surface of this flat tube reaches more than 80%, be far longer than traditional coaxial heat exchanger, thereby improve the heat exchange efficiency of whole micro-channel heat exchanger.
Brief description of the drawings
Fig. 1 is the cross-sectional structure figure of the coaxial heat exchanger that provides of prior art.
Fig. 2 is the three-dimensional structure diagram of the micro-channel heat exchanger that provides of first embodiment of the invention.
Fig. 3 is the three-dimensional exploded view of the micro-channel heat exchanger of Fig. 2.
Fig. 4 is portion's view of the C-C along the line of the micro-channel heat exchanger of Fig. 2.
Fig. 5 shows another flow direction of the working medium of the micro-channel heat exchanger of Fig. 4.
Fig. 6 is portion's view of the micro-channel heat exchanger that provides of second embodiment of the invention.
Fig. 7 shows another flow direction of the working medium of the micro-channel heat exchanger of Fig. 5.
Detailed description of the invention
In order to make object of the present invention, technical scheme and advantage clearer, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein, only in order to explain the present invention, is not intended to limit the present invention.
Refer to Fig. 2 to Fig. 4, the micro-channel heat exchanger 100(that first embodiment of the invention provides is also referred to as parallel-flow heat exchanger) comprise the first header 20, and the second header 30 of being arranged side by side of described the first header 20 and be connected in described the first header 20 and described the second header 30 between some the first flat tubes 40 and some the second flat tubes 50.
Described the first flat tube 40 is arranged alternately and stacking setting on its thickness direction with described the second flat tube 50.The stack thickness of described the first flat tube 40 and the second flat tube 50 equals the thickness sum of all the first flat tubes 40 and the second flat tube 50.
In described the first header 20, be provided with the first dividing plate 21, the inner space of described the first header 20 is separated into the first cavity 22 and the first chamber 23 by described the first dividing plate 21.In described the second header 30, be provided with second partition 31, the inner space of described the second header 30 is separated into the second cavity 32 and the second chamber 33 by described second partition 31.
One end of each the first flat tube 40 is stretched in the first cavity 22 of described the first header 20, and the other end of each the first flat tube 40 stretches in the second cavity 32 of described the second header 30; One end of each the second flat tube 50 is stretched in the first chamber 23 of described the first header 20, and the other end of each the second flat tube 50 stretches in the second chamber 33 of described the second header 30.Described the first cavity 22, the first flat tube 40 and common formation of described the second cavity 32 are used the first flow 60 mobile for the first working medium 61, and common formation of described the first chamber 23, described the second flat tube 50 and described the second chamber 33 used the second runner 70 flowing for the second working medium 71.
Due to described the first flat tube 40 and the stacking setting on its thickness direction of described the second flat tube 50, the area that the first flat tube 40 contacts with the second flat tube 50 is the flat horizontal surface on width, the first working medium 61 and the second working medium 71 are carried out heat exchange on flat horizontal surface, because the width of the first flat tube 40, the second flat tube 50 is far longer than thickness, therefore, the ratio that the heat exchange surface of single flat tube accounts for the total outer surface of this flat tube reaches more than 80%, be far longer than traditional coaxial heat exchanger, thereby improve the heat exchange efficiency of whole micro-channel heat exchanger 100.
The first cavity 22 of described the first header 20 is with respect to more close described second header 30 of the first chamber 23 of described the first header 20.The second chamber 33 of described the second header 30 is with respect to more close described first header 20 of the second cavity 32 of described the second header 30.The setting of staggering on its length direction of described the first flat tube 40 and the second flat tube 50.
In the present embodiment, the first flat tube 40 is identical with the length of the second flat tube 50, cross-sectional structure is also identical, can be obtained by cutting on same flat tube.In other embodiments, the first flat tube 40 can be different from the length of the second flat tube 50, and cross-sectional structure also can be different.Preferably, the first flat tube 40 is profile piece, and the second flat tube 50 is profile piece, to facilitate the manufacture of the first flat tube 40 and the second flat tube 50.
In described the first flat tube 40, be provided with the first heat transfer muscle 41, described the first heat transfer muscle 41 extends along the length direction of the first flat tube 40; In described the second flat tube 50, be provided with the second heat transfer muscle 51, described the second heat transfer muscle 51 extends along the length direction of the second flat tube 50.The first heat transfer muscle 41 and the second heat transfer muscle 51 have been strengthened the heat exchange between working medium and flat tube greatly, have further improved heat exchange efficiency.
Described the first header 20 is profile piece, but is not limited to this; Described the second header 30 is profile piece, but is not limited to this.
Described the first header 20 offers the first opening 62, and described the second header 30 offers the second opening 72, and described the first opening 62 is faced mutually with described the second opening 72.The openings of sizes of described the first opening 62 is consistent with the exterior contour size of the cross section of described the second flat tube 50 common stacked structures that form with described the first flat tube 40, so that the first flat tube 40 and the second flat tube 50 just fill up the first opening 62, and then avoid the first working medium 61 to leak.The openings of sizes of described the second opening 72 is consistent with the exterior contour size of the cross section of described the second flat tube 50 common stacked structures that form with described the first flat tube 40, so that the first flat tube 40 and the second flat tube 50 just fill up the second opening 72, and then avoid the second working medium 71 to leak.The inwall contact position of described the first flat tube 40 and described the second flat tube 50 and the first opening 62 processes by brazing mode; The inwall contact position of described the first flat tube 40 and described the second flat tube 50 and the second opening 72 processes by brazing mode.
On the first dividing plate 21 of described the first header 20, offer some the first through holes 24.The quantity of the first through hole 24 is identical with the quantity of the second flat tube 50.Described some the second flat tubes 50 are arranged in described the first through hole 24 correspondingly.The exterior contour size of the cross section of each the second flat tube 50 is consistent with the perforate size of corresponding the first through hole 24, so that the outer wall of the second flat tube 50 fits in the inwall of the first through hole 24, and then avoids the second working medium 71 to enter in first flow 60.The inwall of the outer wall of the second flat tube 50 and the first through hole 24 is processed by brazing mode.
On the second partition 31 of described the second header 30, offer some the second through holes 34.The quantity of the second through hole 34 is identical with the quantity of the first flat tube 40.Described some the first flat tubes 40 are arranged in described the second through hole 34 correspondingly.The exterior contour size of the cross section of each the first flat tube 40 is consistent with the perforate size of corresponding the second through hole 34, so that the outer wall of the first flat tube 40 fits in the inwall of the second through hole 34, and then avoids the first working medium 61 to enter in the second runner 70.The inwall of the outer wall of the first flat tube 40 and the second through hole 34 is processed by brazing mode.
The opposite end of described the first header 20 has sealed respectively two group of first blanking cover 63; The opposite end of described the second header 30 has sealed respectively two group of second blanking cover 73.Each quantity of organizing the first blanking cover 63 is two, and wherein one first blanking cover 63 is by brazing mode shutoff the first chamber 23, and other one first blanking cover 63 is by brazing mode shutoff the first cavity 22.Each quantity of organizing the second blanking cover 73 is two, and wherein one second blanking cover 73 is by brazing mode shutoff the second chamber 33, and other one second blanking cover 73 is by brazing mode shutoff the second cavity 32.
Described micro-channel heat exchanger 100 also comprises first group of conduit 64 and second group of conduit 74.Described first group of conduit 64 is connected with the first cavity 22 and first chamber 23 of described the first header 20 respectively, and described second group of conduit 74 is connected with the second cavity 32 and second chamber 33 of described the second header 30 respectively.
In the present embodiment, described first group of conduit 64 is also connected with the first cavity 22 and first chamber 23 of described the first header 20 respectively through wherein one group of first blanking cover 63 of described the first header 20; Described second group of conduit 74 is also connected with the second cavity 32 and second chamber 33 of described the second header 30 respectively through wherein one group of second blanking cover 73 of described the second header 30; Between first group of conduit 64 and the first blanking cover 63, be connected by brazing mode; Between second group of conduit 74 and the second blanking cover 73, be connected by brazing mode.In other embodiments, described first group of conduit 64 is arranged on described the first header 20; Described second group of conduit 74 is arranged on described the second header 30, and particularly, first group of conduit 64 is also connected with the first cavity 22 and first chamber 23 of the first header 20 respectively through the first header 20; First group of conduit 74 is also connected with the first cavity 32 and first chamber 33 of the second header 30 respectively through the second header 30; First group of conduit 64, second group of conduit 74 are connected by brazing mode with the first header 20, the second header 30 respectively.
In the present embodiment, described first group of conduit 64 and described second group of conduit 74 are positioned at described the first flat tube 40 and described the second flat tube 50 diagonal angle place of the stacked structures of formation jointly, so that the first working medium 61 is just contrary with the flow direction of the second working medium 71, thereby improve to greatest extent heat exchange efficiency.In other embodiments, described first group of conduit 64 and described second group of conduit 74 also can be positioned at described the first flat tube 40 and described second flat tube 50 the same side of the stacked structures of formation jointly.
The first working medium 61 is cold-producing medium, in Fig. 4, illustrates with hollow arrow, and the second working medium 71 is water or wet goods heat-exchange working medium, in Fig. 4, illustrates with filled arrows.When the micro-channel heat exchanger 100 of first embodiment of the invention is worked, cold-producing medium enters into from the conduit 64 of lower left in the first cavity 22 of the first header 20, distribute to each the first flat tube 40 at the first cavity 22 inner refrigerants, the cold-producing medium of the first flat tube 40 collects again in the second cavity 32 of the second header 30, then from right side, following conduit 74 flows out, heat-exchange working medium enters in the second chamber 33 of the second header 30 from the conduit stream 74 of top, right side, in the second chamber 33, heat-exchange working medium is distributed to each the second flat tube 50, the heat-exchange working medium of the second flat tube 50 collects again in the first chamber 23 of the first header 20, then flow out from the conduit 64 of top, left side.The heat-exchange working medium of the cold-producing medium of the first flat tube 40 and the second flat tube 50 just in time forms adverse current at its intersectional region, thereby has improved to greatest extent heat exchange efficiency.
Understandably, please refer to Fig. 5, cold-producing medium can be contrary with above-mentioned flow direction with the flow direction of heat-exchange working medium, particularly, cold-producing medium is flowed in the second cavity 32 by the following conduit 74 in right side, then distribute to each the first flat tube 40, and come together in the first cavity 22, then flowed out by the following conduit 64 in left side; Heat-exchange working medium flows in the first chamber 23 from the conduit 64 of top, left side, then distributes to each the second flat tube 50, and comes together in the first chamber 23, then flows out from the conduit 74 of top, right side.
The first working medium 61 and second working medium 71 of micro-channel heat exchanger 100 structures of the first embodiment of the invention shown in Fig. 4 and Fig. 5 can be exchanged, and can reach equally the object that improves heat exchange efficiency.Particularly, the first working medium 61 can be water or wet goods heat-exchange working medium, illustrates with hollow arrow; The second working medium 71 can be cold-producing medium, illustrates with filled arrows.
Please refer to Fig. 6, the micro-channel heat exchanger 100 that the micro-channel heat exchanger 200 that second embodiment of the invention provides and the first embodiment provide is roughly the same, and its difference is: the first chamber 23a of described the first header 20a more leans on into described the second header 30a with respect to the first cavity 22a of described the first header 20a; The second chamber 33a of described the second header 30a is with respect to more close described the first header 20a of the second cavity 32a of described the second header 30a; On the first dividing plate 21a of described the first header 20a, offer some the first through hole 24a; On the second partition 31a of described the second header 30a, offer some the second through hole 34a; The opposite end of described some the first flat tube 40a is arranged in respectively in described the first through hole 24a and described the second through hole 34a; The exterior contour size of the cross section of each the first flat tube 40a is consistent with the perforate size of described the first through hole 24a and the perforate size of described the second through hole 34a.
The first working medium 61a is cold-producing medium, in Fig. 6, illustrates with hollow arrow, and the second working medium 71a is water or wet goods heat-exchange working medium, in Fig. 6, illustrates with filled arrows.When the micro-channel heat exchanger 200 of second embodiment of the invention is worked, the conduit 64a of cold-producing medium above left side enters in the first cavity 22a of the first header 20a, distribute to each first flat tube 40a at the first cavity 22a inner refrigerant, the cold-producing medium of the first flat tube 40a collects again in the second cavity 32a of the second header 30a, and then from right side, following conduit 74a flows out; Heat-exchange working medium flow into from the conduit 74a of top, right side in the second chamber 33a of the second header 30a, in the second chamber 33a, heat-exchange working medium is distributed to each second flat tube 50a, the heat-exchange working medium of the second flat tube 50a collects again in the first chamber 23a of the first header 20a, and then from left side, following conduit 64a flows out.The heat-exchange working medium of the cold-producing medium of the first flat tube 40a and the second flat tube 50a just in time forms adverse current at its intersectional region, thereby has improved to greatest extent heat exchange efficiency.
Understandably, please refer to Fig. 7, cold-producing medium can be contrary with above-mentioned flow direction with the flow direction of heat-exchange working medium, particularly, cold-producing medium is flowed in the second cavity 32a by the following conduit 74a in right side, then distribute to each first flat tube 40a, and come together in the first cavity 22a, then flowed out by the conduit 64a of top, left side; Heat-exchange working medium flows in the first chamber 23a from the following conduit 64a in left side, then distributes to each second flat tube 50a, and comes together in the first chamber 23a, then flows out from the conduit 74a of top, right side.
The first working medium 61a and the second working medium 71a of micro-channel heat exchanger 200 structures of the second embodiment of the invention shown in Fig. 6 and Fig. 7 can exchange, and can reach equally the object that improves heat exchange efficiency.Particularly, the first working medium 61a can be water or wet goods heat-exchange working medium, illustrates with hollow arrow; The second working medium 71a can be cold-producing medium, illustrates with filled arrows.
The foregoing is only preferred embodiment of the present invention, not in order to limit the present invention, all any amendments of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., within all should being included in protection scope of the present invention.
Claims (10)
1. a micro-channel heat exchanger, the second header that it comprises the first header and is arranged side by side with described the first header, it is characterized in that: described micro-channel heat exchanger also comprises some the first flat tubes and some the second flat tubes that are connected between described the first header and described the second header, described the first flat tube and described the second flat tube are arranged alternately and stacking setting on its thickness direction, in described the first header, be provided with the first dividing plate, the inner space of described the first header is separated into the first cavity and the first chamber by described the first dividing plate, in described the second header, be provided with second partition, the inner space of described the second header is separated into the second cavity and the second chamber by described second partition, one end of each the first flat tube is stretched in the first cavity of described the first header, the other end of each the first flat tube stretches in the second cavity of described the second header, one end of each the second flat tube is stretched in the first chamber of described the first header, the other end of each the second flat tube stretches in the second chamber of described the second header, described the first cavity, the common first flow of using for the first Working fluid flow that forms of described the first flat tube and described the second cavity, described the first chamber, common the second runner used for the second Working fluid flow that forms of described the second flat tube and described the second chamber.
2. micro-channel heat exchanger as claimed in claim 1, it is characterized in that: the first cavity of described the first header is with respect to more close described second header of the first chamber of described the first header, and the second chamber of described the second header is with respect to more close described first header of the second cavity of described the second header.
3. micro-channel heat exchanger as claimed in claim 2, it is characterized in that: on the first dividing plate of described the first header, offer some the first through holes, described some the second flat tubes are arranged in respectively in described the first through hole, the exterior contour size of the cross section of each the second flat tube is consistent with the perforate size of corresponding the first through hole, on the second partition of described the second header, offer some the second through holes, described some the first flat tubes are arranged in respectively in described the second through hole, the exterior contour size of the cross section of each the first flat tube is consistent with the perforate size of corresponding the second through hole.
4. micro-channel heat exchanger as claimed in claim 1, it is characterized in that: the first chamber of described the first header more leans on into described the second header with respect to the first cavity of described the first header, the second chamber of described the second header is with respect to more close described first header of the second cavity of described the second header.
5. micro-channel heat exchanger as claimed in claim 4, it is characterized in that: on the first dividing plate of described the first header, offer some the first through holes, on the second partition of described the second header, offer some the second through holes, the opposite end of described some the first flat tubes is arranged in respectively in described the first through hole and described the second through hole, and the exterior contour size of the cross section of each the first flat tube is consistent with the perforate size of the perforate of described the first through hole size and described the second through hole.
6. the micro-channel heat exchanger as described in claim 1-5 any one, it is characterized in that: described the first header offers the first opening, described the second header offers the second opening, described the first opening is faced mutually with described the second opening, and the openings of sizes of described the first opening and described the second opening is consistent with the exterior contour size of the cross section of described the first flat tube and the common stacked structure forming of described the second flat tube.
7. the micro-channel heat exchanger as described in claim 1-5 any one, is characterized in that: described the first header is profile piece, described the second header is profile piece.
8. the micro-channel heat exchanger as described in claim 1-5 any one, it is characterized in that: described micro-channel heat exchanger also comprises first group of conduit and second group of conduit, described first group of conduit is connected with the first cavity and first chamber of described the first header respectively, and described second group of conduit is connected with the second cavity and second chamber of described the second header respectively.
9. micro-channel heat exchanger as claimed in claim 8, it is characterized in that: the opposite end of described the first header has sealed respectively two group of first blanking cover, the opposite end of described the second header has sealed respectively two group of second blanking cover, described first group of conduit need to be arranged on described the first blanking cover or described the first header according to using, and described second group of conduit need to be arranged on described the second blanking cover or described the second header according to using.
10. the micro-channel heat exchanger as described in claim 1-5 any one, is characterized in that: described the first flat tube is identical with the cross-sectional structure of described the second flat tube, in described the first flat tube and described the second flat tube, is provided with heat transfer muscle.
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| CN201210484529.6A CN103837025B (en) | 2012-11-23 | 2012-11-23 | Micro-channel heat exchanger |
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| CN201210484529.6A CN103837025B (en) | 2012-11-23 | 2012-11-23 | Micro-channel heat exchanger |
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| CN114111127A (en) * | 2020-08-26 | 2022-03-01 | 广东美的暖通设备有限公司 | Heat exchanger, electric control box and air conditioning system |
| WO2022042456A1 (en) * | 2020-08-26 | 2022-03-03 | 广东美的暖通设备有限公司 | Heat exchanger, electric control box and air conditioning system |
| EP4134610A4 (en) * | 2020-08-26 | 2023-10-18 | GD Midea Heating & Ventilating Equipment Co., Ltd. | Heat exchanger, electric control box and air conditioning system |
| US11982459B2 (en) | 2020-08-26 | 2024-05-14 | Gd Midea Heating & Ventilating Equipment Co., Ltd. | Air conditioning apparatus and electric control box |
| CN112146310A (en) * | 2020-10-12 | 2020-12-29 | 浙江新金宸机械有限公司 | Flat tube micro-channel double-liquid heat exchanger and heat exchange method thereof |
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