CN103277942B - Parallel flow heat exchanger and air conditioner - Google Patents
Parallel flow heat exchanger and air conditioner Download PDFInfo
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- CN103277942B CN103277942B CN201310178790.8A CN201310178790A CN103277942B CN 103277942 B CN103277942 B CN 103277942B CN 201310178790 A CN201310178790 A CN 201310178790A CN 103277942 B CN103277942 B CN 103277942B
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Abstract
The invention discloses a parallel flow heat exchanger and an air conditioner. The parallel flow heat exchanger comprises a closed collecting main pipe and a plurality of U-shaped flat pipes arranged in parallel, and the collecting main pipe is located on one side of the parallel flow heat exchanger and is arranged relative to two free ends of the flat pipes. A middle separating plate is arranged in the collecting main pipe in the length direction to divide the inner cavity of the collecting main pipe into two distribution chambers. The two free ends of the flat pipes are correspondingly communicated with the two distribution chambers respectively. Two guiding pipes which are used for refrigerant to flow in and out and are correspondingly communicated with the two distribution chambers are further connected outside the collecting main pipe. When heat exchange is carried out in a heating cycle, freezing medium flows in from one guiding pipe and flows out from the other guiding pipe, due to the fact that a freezing medium inlet and a freezing medium outlet are arranged in the same side, the wind blowing over subcooled liquid positions of the flat pipes can be heated by the high-temperature freezing medium of superheated steam of the flat pipes simultaneously, therefore, the problem that wind coming out from different positions of the heat exchanger is large in temperature difference is greatly reduced, the temperature of a low-temperature area and the temperature of a high-temperature area are balanced, and the comfort of the utilization of the air conditioner is improved.
Description
Technical field
The present invention relates to air-conditioning technical field, particularly relate to a kind of parallel-flow heat exchanger and air-conditioner.
Background technology
Parallel-flow heat exchanger, because of lightweight, that heat exchange efficiency is high advantage, is used widely in field of automobile air conditioner.At present, some domestic air conditionings and business air conditioner manufacturer start to apply the heat exchanger that micro-channel parallel flow heat exchanger substitutes traditional copper pipe fin type, can also reduce the cost of air-conditioner while realizing air-conditioner high energy efficiency.
The application mode of current concurrent flow on indoor machine evaporation as shown in Figure 1, the parallel placement of two headers 10,50, what this two header 10 was relative with 50 has multiple groove, a flat tube 30 is inserted in each groove, header 10 is inserted in one end of every root flat tube, the other end inserts header 50, and the gap between flat tube 30 places Wavelike finned 60, and two headers 10,50 are respectively arranged with conduit 20,40.
Flat tube is generally pressed vertical direction and is placed by parallel-flow evaporator, and as shown in Figure 2, during refrigeration, refrigerant enters from the header 10 be in compared with upper/lower positions, then flows through flat tube 30 from bottom to top, finally flows out by being in the header 50 comparatively going up position; When heating, flow of refrigerant direction is contrary, flowing into, then flowing through flat tube 30 from top to bottom, finally flowing out from the header 10 be in compared with upper/lower positions by being in the header 50 comparatively going up position.
Heating in circulation, refrigerant flow direction as shown in Figure 2, cold-producing medium is divided into 3 region I from top to bottom in flat tube, II, III, region I is superheated steam zone, region II is Gas-liquid phase region, region III is supercooled liquid tagma, the overheated refrigerant steam that compressor is discharged is assigned in flat tube 30 from being in after the header 50 comparatively position flows into, the fin 60 of flat tube 30 external welding carries out forced-convection heat transfer with the wind blowing to fin 60 surface, thus make the cold-producing medium in flat tube 30 obtain condensation, cold-producing medium is in flat tube, the limit heat release of limit flowing from top to bottom, by the I region in Fig. 2 behind II region, cold-producing medium becomes gas-liquid two-phase state from superheated steam, now cold-producing medium starts to release gasification latent heat, after cold-producing medium discharges gasification latent heat, then all be condensed into liquid, and enter the III region of flat tube 30 end, can continue to send a small amount of heat at III region cold-producing medium and become cold liquid, then be pooled to the header 10 be in compared with upper/lower positions to flow out.Owing to being in high temperature at the I district cold-producing medium of flat tube 30, can a large amount of gasification latent heat being discharged at the II district cold-producing medium of flat tube 30, therefore the wind flowing through I, II district of flat tube 30 is all warmmer, and only in the III region of flat tube 30, because cold-producing medium has been lower temperature and excessively cold, and it is also little with the wind-warm syndrome difference flowing through this region, heat exchange amount is very little, and the air temperature therefore blown out from the III region of flat tube 30 is very low.The wind part temperature finally causing blowing out from whole heat exchanger is very high, and a part of temperature is very low, causes leaving air temp comparison in difference large, thus have impact on the comfortableness that whole air-conditioner uses.
Summary of the invention
Main purpose of the present invention is to provide a kind of parallel-flow heat exchanger and air-conditioner, is intended to reduce air conditioning exhausting temperature contrast, improves the comfortableness that air-conditioner uses.
In order to achieve the above object, the present invention proposes a kind of parallel-flow heat exchanger, comprising: the U-shaped flat tube of a header closed and some parallel arranged, and described header is positioned at the side of described parallel-flow heat exchanger, and arranges relative to two free ends of described flat tube; Be provided with median septum along its length in described header, described header internal cavity is divided into two distribution cavity; Two free ends of described flat tube are corresponding to be respectively communicated with described two distribution cavity; Described header is also connected with outward for passing in and out refrigerant, corresponding two conduits be communicated with described two distribution cavity.
Preferably, described header internal cavity is divided into upper and lower two distribution cavity by described median septum, two free end left-right situs of described flat tube, and the end face of two free ends does not flush; Wherein:
The lateral wall of described upper distribution cavity is provided with the first groove inserted for the free end that described flat tube is shorter, and for the second groove that the free end that described flat tube is longer inserts; Described first groove and the second groove interval are arranged;
Described median septum is provided with the 3rd groove inserted for the free end that described flat tube is longer, described 3rd groove and described second groove consistency from top to bottom;
The shorter free end of described flat tube inserts described first groove and is communicated with upper distribution cavity; Described flat tube longer free end inserts described second groove successively, the 3rd groove is communicated with lower distribution cavity.
Preferably, the bending part diameter that the spacing between described first groove and the second groove equals described flat tube center line or the distance equaled between U-shaped flat tube two parallel portion center line.(as a kind of embodiment, flat tube also can be folded into 2 right angles i.e. " ┌ ┐ " shape.）
Preferably, described header internal cavity is divided into front and back two distribution cavity by described median septum, and two free end correspondences of described flat tube in tandem; The sidewall of the relatively described flat tube free end of described front and back two distribution cavity is provided with groove; Two free ends of described flat tube insert described front and back two distribution cavity respectively by corresponding described groove.
Preferably, the cross section of described header is square, circular or oval.
Preferably, described header by up and down or front and back two parts body Symmetric Composite form.
Preferably, described header comprise with described median septum cylinder and be arranged on the blanking cover at described body two ends; Described cylinder is combined by the body of to be the body of D shape and a cross section be in cross section C shape; Or the body that described cylinder is D shape by two sections combines; Or the sheet plate that the body and that described cylinder is C shape by two sections is arranged between two bodys combines.
Preferably, described two conduits are arranged on described cylinder; Or described two conduits are arranged on described blanking cover, or one is arranged on described cylinder, and another root is arranged on described blanking cover.
Preferably, in the bending region of described flat tube and be equipped with fin between flat tube.
Preferably, described heat exchanger lead welding and shaping; The length of described flat tube distributes at the zones of different Length discrepancy of heat exchanger.
Preferably, the length of described fin distributes at the zones of different Length discrepancy of heat exchanger; Described heat exchanger geometry is trapezoidal, triangle or semicircle.
The present invention also proposes a kind of air-conditioner, comprises parallel-flow heat exchanger as above.
A kind of parallel-flow heat exchanger that the present invention proposes and air-conditioner, arrange header by the side at parallel-flow heat exchanger, arrange U-shaped flat tube simultaneously, be provided with median septum along its length in header, header internal cavity is divided into two distribution cavity; Two free ends of described flat tube are corresponding to be respectively communicated with two distribution cavity; Also be connected with outward for passing in and out refrigerant, corresponding two conduits be communicated with two distribution cavity at header.When heating cycle heat exchange, cold-producing medium is a wherein conduit inflow from header, from header, another conduit flows out, due to refrigerant inlet and outlet are arranged on the same side, by putting together compared with the region of low-temperature region and higher temperatures in flat tube, the wind of blowing over flat tube subcooled liquid place can be heated by the high temperature refrigerant of flat tube superheated steam simultaneously, thus the problem that the different local air temperature out of heat exchanger differs greatly can be greatly reduced, the temperature of low-temperature space and high-temperature region is balanced, and then improves the comfortableness of air-conditioner use.
Accompanying drawing explanation
Fig. 1 is the structural representation of existing parallel-flow heat exchanger;
Fig. 2 is that existing parallel-flow heat exchanger heats circulation theory schematic diagram;
Fig. 3 is the perspective view of parallel-flow heat exchanger first embodiment of the present invention;
Fig. 4 is the front view of the parallel-flow heat exchanger shown in Fig. 3;
Fig. 5 is the assembling decomposing schematic representation of the header shown in Fig. 3 and flat tube;
Fig. 6 is that parallel-flow heat exchanger embodiment of the present invention heats circulation theory schematic diagram;
Fig. 7 is that parallel-flow heat exchanger embodiment of the present invention heats circulation theory schematic diagram;
Fig. 8 a is the schematic diagram of header body in parallel-flow heat exchanger first embodiment of the present invention;
Fig. 8 b is the schematic diagram of header body in parallel-flow heat exchanger second embodiment of the present invention;
Fig. 8 c is the STRUCTURE DECOMPOSITION schematic diagram of header body in parallel-flow heat exchanger of the present invention 3rd embodiment;
Fig. 8 d is the STRUCTURE DECOMPOSITION schematic diagram of header body in parallel-flow heat exchanger of the present invention 4th embodiment;
Fig. 8 e is the STRUCTURE DECOMPOSITION schematic diagram of header body in parallel-flow heat exchanger of the present invention 5th embodiment;
Fig. 8 f is the STRUCTURE DECOMPOSITION schematic diagram of header body in parallel-flow heat exchanger of the present invention 6th embodiment;
Fig. 8 g is the STRUCTURE DECOMPOSITION schematic diagram of header body in parallel-flow heat exchanger of the present invention 7th embodiment;
Fig. 9 is the structural representation of parallel-flow heat exchanger of the present invention 8th embodiment;
Figure 10 is the structural representation of parallel-flow heat exchanger of the present invention 9th embodiment.
In order to make technical scheme of the present invention clearly, understand, be described in further detail below in conjunction with accompanying drawing.
Detailed description of the invention
Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
As shown in Fig. 3, Fig. 4 and Fig. 5, first embodiment of the invention proposes a kind of parallel-flow heat exchanger, comprise: the U-shaped flat tube 6 of a header 1 closed and some parallel arranged, this U-shaped flat tube 6 is that a straight tube bending 180 ° forms, end face 6A with 6B of two free ends of the flat tube 6 after bending is in the same side and not concordant, namely, not in same plane, 6A is longer for end face shown in Fig. 5; Fin 5 is equipped with in the bending region of described flat tube 6 and between flat tube 6; Described header 1 is positioned at the side of described parallel-flow heat exchanger, and arranges relative to two free ends of described flat tube 6.
Described header 1 comprise with described median septum 1A cylinder and be arranged on the blanking cover 4 at described body two ends; Be provided with median septum 1A along its length in the cylinder of described header 1, described header 1 internal cavity is divided into two distribution cavity P1, P2.
Two free ends of described flat tube 6 are corresponding to be respectively communicated with described two distribution cavity P1, P2; Described header 1 is outer to be also connected with for passing in and out refrigerant, corresponding two conduits 2,3 be communicated with described two distribution cavity P1, P2.
Particularly, in the present embodiment, the cross section of described header 1 is rectangle, and as shown in Figure 8 a, the body of described median septum 1A and header 1 is one-body molded; Described header 1 internal cavity is divided into upper and lower two distribution cavity P1, P2 by described median septum 1A, two free end left-right situs of described flat tube 6, and end face 6A, 6B of two free ends do not flush.
Wherein, the lateral wall of described upper distribution cavity P1 is provided with the first groove 1B inserted for the free end (end corresponding to end face 6B) that described flat tube 6 is shorter, and for the second groove 1B` that the free end (end corresponding to end face 6A) that described flat tube 6 is longer inserts; The equidistant interval of described first groove 1B and the second groove 1B` is arranged.
Described median septum 1A is provided with the 3rd groove 1C inserted for the free end that described flat tube 6 is longer, described 3rd groove 1C and described second groove 1B` one_to_one corresponding consistency from top to bottom, the quantity of the 3rd groove 1C therefore described median septum 1A arranged is the half of the groove that the lateral wall of upper distribution cavity P1 is arranged.
The shorter free end of described flat tube 6 inserts described first groove 1B and is communicated with upper distribution cavity P1; The longer free end of described flat tube 6 inserts described second groove 1B` successively, the 3rd groove 1C is communicated with lower distribution cavity P2.
As a kind of embodiment, the spacing between above-mentioned first groove 1B and the second groove 1B` can equal the bending part diameter of described flat tube 6 center line.As another kind of embodiment, the flat tube of U-shaped also can be folded into 2 right angles i.e. " ┌ ┐ " shape, and in this case, the spacing between above-mentioned first groove 1B and the second groove 1B` then can equal the distance between described flat tube 6 liang of parallel portion center lines.
The quantity of above-mentioned blanking cover 4 can be set to one, one end or two, one end as required, and the present embodiment is two, one end, totally four.Header 1 is separated into upper and lower two distribution cavity P1 and P2 by header 1 body, median septum 1A and four blanking cover 4, and as shown in Figure 4, upper distribution cavity P1 holds with the 6B of all flat tubes 6 and is communicated with; Lower distribution cavity P2 holds with the 6A of all flat tubes 6 and is communicated with.Conduit 3 is had to be communicated with 2 at the upper distribution cavity P1 of header 1 outward respectively with lower distribution cavity P2.Whole heat exchanger can adopt lead welding and shaping.
As shown in FIG. 6 and 7, when heating cycle heat exchange, cold-producing medium flows into from conduit 3, enters the 6B end face place pipeline section of flat tube 6, after flow out from conduit 2 after the 6A end face place pipeline section of flat tube 6.The flowing of cold-producing medium in flat tube 6 as Fig. 6, Fig. 7 in flat tube 6 region signal, from flat tube 6 import to outlet, flat tube 6 inner refrigerant is divided into three regions I, II, III, the temperature refrigerant vapor flowed into from conduit 3 enters into distribution cavity p1, assign in many flat tubes 6 by distribution cavity p1 again, the I region cold-producing medium of flat tube 6 is still superheated steam again, arrive II region, cold-producing medium starts condensation, become Gas-liquid phase region, in this region, cold-producing medium can discharge a large amount of gasification latent heats, arrived III region, the whole condensation of cold-producing medium also becomes subcooled liquid.
And owing to refrigerant inlet and outlet to be arranged on the same side, put together by the region (I region) of the comparatively low-temperature region (III region) in flat tube 6 with higher temperatures, the wind of blowing over flat tube 6 subcooled liquid place can be heated by the high temperature refrigerant of flat tube 6 superheated steam simultaneously, make each regional temperature of air-out near uniform, thus the problem that the different local air temperature out of heat exchanger differs greatly can be greatly reduced, the temperature of low-temperature space and high-temperature region is balanced, as shown in Figure 7, the hot blast of temperature equalization is from heat exchanger wind out, and then improve the comfortableness of air-conditioner use.
In addition, compare existing parallel-flow heat exchanger, the present embodiment heat exchanger, because only having a header 1, makes total be simplified, and becomes compact, saves raw material.
It should be noted that, the shape of cross section of above-mentioned header 1 can also be other polygons, circle, ellipse etc.
As shown in Figure 8 b, it is the schematic diagram of header body in parallel-flow heat exchanger second embodiment of the present invention.The difference of the present embodiment and above-mentioned first embodiment is, the cross section of header 1 described in the present embodiment is circular, in the middle of the body of circle, be provided with median septum 1A, header 1 inner chamber be separated into header 1 body and dividing plate in 2 distribution cavity P1 and P2, figure also as a whole.Other are identical with the first embodiment.
Shown in Fig. 8 c, it is the schematic diagram of header body in parallel-flow heat exchanger of the present invention 3rd embodiment.The difference of the present embodiment and above-mentioned second embodiment is, header 1 described in the present embodiment is formed by front and back two parts body Symmetric Composite, the cross section of every a part of body is roughly E shape, breach 1B is outputed at the outer wall of each body, middle median septum 1A gap 1C, after closing up before and after two E shape bodys, form the groove inserted for flat tube 6, also form distribution cavity P1, P2 simultaneously.Other are identical with the first embodiment.
Shown in Fig. 8 d, it is the schematic diagram of header 1 body in parallel-flow heat exchanger of the present invention 4th embodiment.The difference of the present embodiment and above-mentioned second embodiment is, the cylinder of header 1 described in the present embodiment is D shape body 11 and a cross section by a cross section is that C shape body about 12 combines.The groove 1B inserted for flat tube 6 is offered on the face of cylinder of D shape body 11, the flat face and median septum 1A of D shape body 11 are offered the groove 1C inserted for flat tube 6, D shape body 11 inside forms distribution cavity P1, D shape body 11 and C shape body 12 closes up rear median septum 1A and C shape body 12 forms distribution cavity P2 jointly.Other are identical with the first embodiment.
Shown in Fig. 8 e, it is the schematic diagram of header 1 body in parallel-flow heat exchanger of the present invention 5th embodiment.The difference of the present embodiment and above-mentioned second embodiment is, the body that the cylinder 1 of header 1 described in the present embodiment is D shape by two sections combines up and down.Upper D shape body cylindrical surface offers the groove 1B inserted for flat tube 6, and upper and lower D shape body flat face and median septum 1A respectively have the groove 1C inserted for flat tube 6, the groove 1C one_to_one corresponding of upper and lower D shape body, each self-forming distribution cavity P1 of upper and lower D shape body 1, P2.Other are identical with the first embodiment.
Shown in Fig. 8 f, it is the schematic diagram of header 1 body in parallel-flow heat exchanger of the present invention 6th embodiment.The difference of the present embodiment and above-mentioned 4th embodiment is, the cylinder of header 1 described in the present embodiment is C shape body 11 and a cross section by a cross section is that D shape body about 12 combines.C shape body 11 has groove 1B above, below the flat face 1A of D shape body 12 have groove 1B, below D shape body 12 self form distribution cavity P2, above C shape body 11 close up rear flat face 1A with D shape body 12 below and C shape body 11 forms distribution cavity P1.Other are identical with the 4th embodiment.
Shown in Fig. 8 g, it is the schematic diagram of header 1 body in parallel-flow heat exchanger of the present invention 7th embodiment.The difference of the present embodiment and above-mentioned second embodiment is, the sheet plate that the body and that the cylinder 1 of header 1 described in the present embodiment is C shape by two sections is arranged between two bodys combines.Two C shape bodys are symmetrical up and down to be placed, and the sheet plate be arranged between two bodys is median septum 1A, and upper C shape pipe offers groove 1B, and median septum 1A offers groove 1C, after two C shape bodys and median septum 1A close up, is forming distribution cavity P1 and P2 respectively up and down.Other are identical with the second embodiment.
Shown in Fig. 9, it is the schematic diagram of parallel-flow heat exchanger of the present invention 8th embodiment.The difference of the present embodiment and above-mentioned first embodiment is, two conduits 2,3 in the first embodiment are arranged on the cylinder of header 1; In the present embodiment, two conduits 2,3 are arranged on described blanking cover 4.Other are identical with the first embodiment.
Composition graphs 4 and Fig. 9, conduit 2,3 can carry out arbitrary matched combined on header 1 and blanking cover 4, and can also be such as that a conduit 2 is arranged on cylinder, another root conduit 3 be arranged on blanking cover 4.
Shown in Figure 10, it is the schematic diagram of parallel-flow heat exchanger of the present invention 9th embodiment.The difference of the present embodiment and above-mentioned first embodiment is, the length of the flat tube 6 in the first embodiment is in the isometric distribution of the zones of different of heat exchanger, and the length of flat tube 6 in embodiment is in this isometric distribution of zones of different of heat exchanger.
Particularly, the present embodiment also can according to use occasion by changing flat tube 6 length of zones of different, realize different heat exchanger profiles, as shown in Figure 10,1 is header 1,2,3 is conduit, 4 be the blanking cover 4,5,51,52 of header 1 end be different length fin 5,6,61,62 is different length flat tube 6, be provided with median septum 1A in the inside of header 11, header 11 is divided into two distribution cavity p1 and p2 by median septum 1A, blanking cover 44.Conduit 2 is communicated with distribution cavity p2, and conduit 3 is communicated with distribution cavity p1.Flat tube 6 bending 180o in figure, its end face 6A is communicated with distribution cavity p2, and end face 6B is communicated with distribution cavity p1, the present embodiment passes through flat tube 6 and the fin 5 of employing three kinds of length, realizing heat exchanger shaped upper part is waveform, thus can realize air conditioner housing and also do waviness, increases the attractive in appearance of air-conditioning products.By the length of the flat tube 6 with fin 5 that change zones of different, also can realize that heat exchanger geometry does in echelon, triangle and approximate semicircle etc.
It should be noted that, in other embodiments, parallel-flow heat exchanger can also adopt following structure:
Described header 1 internal cavity is divided into front and back two distribution cavity by described median septum 1A, and two free end correspondences of described flat tube 6 in tandem; The sidewall of described front and back two distribution cavity relatively described flat tube 6 free end is provided with groove; Two free ends of described flat tube 6 insert described front and back two distribution cavity respectively by corresponding described groove.Wherein.The end face of two free ends of described flat tube 6 can flush mutually, also can not mutually flush.Other are similar to the various embodiments described above.
In addition, the present invention also proposes a kind of air-conditioner, comprises parallel-flow heat exchanger as above.
A kind of parallel-flow heat exchanger that the embodiment of the present invention proposes and air-conditioner, by arranging header 1 in the side of parallel-flow heat exchanger, U-shaped flat tube 6 is set simultaneously, in header 1, is provided with median septum 1A along its length, header 1 internal cavity is divided into two distribution cavity P1, P2; Two free ends of described flat tube 6 are corresponding to be respectively communicated with two distribution cavity; Also be connected with outside header 1 for passing in and out refrigerant, corresponding two conduits 2,3 be communicated with two distribution cavity P1, P2.When heating cycle heat exchange, cold-producing medium from header 1 wherein a conduit 3 flow into, from header 1, another conduit 2 flows out, due to refrigerant inlet and outlet are arranged on the same side, by putting together compared with the region of low-temperature region and higher temperatures in flat tube 6, the wind of blowing over flat tube 6 subcooled liquid place can be heated by the high temperature refrigerant of flat tube 6 superheated steam simultaneously, thus the problem that the different local air temperature out of heat exchanger differs greatly can be greatly reduced, the temperature of low-temperature space and high-temperature region is balanced, and then improve the comfortableness of air-conditioner use.
Above are only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention and accompanying drawing content to do equivalent structure or flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (12)
1. a parallel-flow heat exchanger, is characterized in that, comprising: the U-shaped flat tube of a header closed and some parallel arranged, and described header is positioned at the side of described parallel-flow heat exchanger, and arranges relative to two free ends of described flat tube; Be provided with median septum along its length in described header, described header internal cavity is divided into two distribution cavity; Two free ends of described flat tube are corresponding to be respectively communicated with described two distribution cavity; Described header is also connected with for passing in and out refrigerant, corresponding two conduits be communicated with described two distribution cavity outward; Described header internal cavity is divided into upper and lower two distribution cavity by described median septum, two free end left-right situs of described flat tube, and the end face of two free ends does not flush; Or described header internal cavity is divided into front and back two distribution cavity by described median septum, two free end correspondences of described flat tube in tandem.
2. parallel-flow heat exchanger according to claim 1, is characterized in that, the lateral wall of described upper distribution cavity is provided with the first groove inserted for the free end that described flat tube is shorter, and for the second groove that the free end that described flat tube is longer inserts; Described first groove and the second groove interval are arranged;
Described median septum is provided with the 3rd groove inserted for the free end that described flat tube is longer, described 3rd groove and described second groove consistency from top to bottom;
The shorter free end of described flat tube inserts described first groove and is communicated with upper distribution cavity; Described flat tube longer free end inserts described second groove successively, the 3rd groove is communicated with lower distribution cavity.
3. parallel-flow heat exchanger according to claim 2, is characterized in that, the bending part diameter that the spacing between described first groove and the second groove equals described flat tube center line or the distance equaled between U-shaped flat tube two parallel portion center line.
4. parallel-flow heat exchanger according to claim 1, is characterized in that, the sidewall of the relatively described flat tube free end of described front and back two distribution cavity is provided with groove; Two free ends of described flat tube insert described front and back two distribution cavity respectively by corresponding described groove.
5. the parallel-flow heat exchanger according to any one of claim 1-4, is characterized in that, the cross section of described header is square, circular or oval.
6. parallel-flow heat exchanger according to claim 5, is characterized in that, described header by up and down or front and back two parts body Symmetric Composite form.
7. the parallel-flow heat exchanger according to Claims 2 or 3, is characterized in that, described header comprise with described median septum cylinder and be arranged on the blanking cover at described body two ends; Described cylinder is combined by the body of to be the body of D shape and a cross section be in cross section C shape; Or the body that described cylinder is D shape by two sections combines; Or the sheet plate that the body and that described cylinder is C shape by two sections is arranged between two bodys combines.
8. parallel-flow heat exchanger according to claim 7, is characterized in that, described two conduits are arranged on described cylinder; Or described two conduits are arranged on described blanking cover; Or one is arranged on described cylinder, and another root is arranged on described blanking cover.
9. the parallel-flow heat exchanger according to any one of claim 1-4, is characterized in that, in the bending region of described flat tube and be equipped with fin between flat tube.
10. parallel-flow heat exchanger according to claim 9, is characterized in that, described heat exchanger lead welding and shaping; The length of described flat tube distributes at the zones of different Length discrepancy of heat exchanger.
11. parallel-flow heat exchangers according to claim 10, is characterized in that, the length of described fin distributes at the zones of different Length discrepancy of heat exchanger; Described heat exchanger geometry is trapezoidal, triangle or semicircle.
12. 1 kinds of air-conditioners, is characterized in that, comprise the parallel-flow heat exchanger according to any one of claim 1-11.
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| CN104596153B (en) * | 2013-10-31 | 2018-09-28 | 杭州三花微通道换热器有限公司 | Micro-channel heat exchanger |
| CN106642826B (en) * | 2015-10-28 | 2019-04-19 | 丹佛斯微通道换热器（嘉兴）有限公司 | Heat exchanger |
| US20190168582A1 (en) * | 2017-12-01 | 2019-06-06 | Carrier Corporation | Multi-temperature transportation refrigeration system |
| CN114576884A (en) * | 2020-11-30 | 2022-06-03 | 丹佛斯有限公司 | Heat exchanger and air conditioning system |
| CN114909831B (en) * | 2021-02-08 | 2024-06-14 | 广东美的暖通设备有限公司 | Heat exchanger, electric control box and air conditioning system |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20030035513A (en) * | 2001-10-31 | 2003-05-09 | 한라공조주식회사 | Heat exchanger for using CO2 as a refrigerant |
| CN1666076A (en) * | 2002-07-05 | 2005-09-07 | 贝尔两合公司 | Heat exchanger, in particular for an evaporator of an air conditioning system of a motor vehicle |
| CN2800210Y (en) * | 2005-06-24 | 2006-07-26 | 清华大学 | Micro-channel parallel flow heat exchanger for trans-critical CO2 circulation |
| CN203310165U (en) * | 2013-05-14 | 2013-11-27 | 广东美的制冷设备有限公司 | Parallel flow heat exchanger and air conditioner |
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