CN204854080U - Parallel -flow evaporator pressure manifold - Google Patents
Parallel -flow evaporator pressure manifold Download PDFInfo
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- CN204854080U CN204854080U CN201520132286.9U CN201520132286U CN204854080U CN 204854080 U CN204854080 U CN 204854080U CN 201520132286 U CN201520132286 U CN 201520132286U CN 204854080 U CN204854080 U CN 204854080U
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Abstract
The utility model relates to a parallel -flow evaporator pressure manifold. The sectional mesophragma muscle top of pressure manifold be equipped with horizontal hole, the hole on to be equipped with crowd lid sealed, the pressure manifold on the flat pipe department of inserting be both ends thin form in the middle of thick, be equipped with the soldering lug on the face that inserts of flat pipe, lower pressure manifold in refrigerant entry baffle only establish an access opening, the flow distribution plate on be equipped with a plurality of length, the superimposed complex through -hole of circle as the dispensing orifice of refrigerant, two flat pipes are supplied with in every hole, the dispensing orifice center not with two flat tub of mouth of pipe equidistance, but be partial to the flat mouth of pipe 1mm of incoming flow direction, the flow distribution plate utilize the intraductal long limit of spacer and flat pipe location, intersect and personally submit L shape, the sealed baffle that all adopts of partition of pressure manifold, flow distribution plate uropore design growth strip 315, the aisle spare is for about 17mm2, aisle spare / collector always effectively flow area be 0.07, hydraulic diameter 0.8mm to apart from tail end 13mm -23mm. The utility model discloses enable refrigerant uniform flow in the evaporimeter, the flow resistance reduces, and the temperature of the play windpiston of evaporimeter is even, can compare midea level or higher laying a good foundation with imported product of the same kind for the refrigerating output rises to, the stable performance, simple structure simultaneously, the processing quality is reliable, and is with low costs, invest little, universalization degree height.
Description
Technical field
The utility model relates to a kind of automotive heat exchanger technical field, particularly relates to a kind of parallel-flow evaporator header.
Background technology
The parallel-flow evaporator of current aluminum air conditioning for automobiles is in order to ensure that refrigerating efficiency is high, and size is little, lightweight feature, thus adopt repeatedly with the principle design of air cross heat exchange.And be generally designed to 4 flow processs (Fig. 1), namely refrigerant and air can carry out 4 heat exchanges.And after exchanging at every turn refrigerant must mix in header commutation flow to downstream again.Therefore the header of its evaporator core is all two-tube up-down structure totally 8 chambeies 1,2,3,4,5,6,7,8.
The parallel-flow evaporator of prior art forms refrigerant passage by upper header 201, lower header 202 and flat pipe group 203, dividing plate 205,206 and blanking cover 207,227.And refrigerant is gas-liquid two-phase mixed flow state in header, CONCENTRATION DISTRIBUTION is uneven, and flow velocity is different everywhere.It is uneven that this just makes to distribute to by header the refrigerant often propping up flat tube.Cause evaporator surface everywhere temperature differ, refrigerating capacity decline.In order to ensure high efficiency refrigeration and uniformity of temperature profile, header also will increase the flow distribution plate 209,210 having refrigerant distribution function except conveying function in the 3rd, 7 (Fig. 1) chamber, in the middle of 4,5 chambeies, set up cross through hole 208.The structure of header has also been got up with regard to complexity, and refrigerant flow resistance therefore increases, and therefore refrigeration performance is also restricted, and header importance in the product also just highlights.
There is following shortcoming in the header of the parallel-flow evaporator of prior art: 1, and the header of prior art adopts the cross section 229 of two-chamber extruded tube, and in cross through hole 208 adopts, the method for rushing is made.But inside rush cross-drilled hole because of mould strength and material strength problem, via area cannot strengthen, size is also difficult to stablize.Cannot continue reduce refrigerant flow resistance and improve refrigerating capacity.Refrigeration performance is also difficult to stablize, and the expensive rapid wear of interior stamping die.
2, although the large R design 211 of the symmetry of wall thickness that waits of 8 word pipes ensure that intensity, in order to ensure weld length, but make flat tube insert too dark.The valid circulation area of 8 word pipes is reduced, and only reaching collector inner chamber plane of structure and amass 73% of 330mm2, is 241mm2.Resistance therefore increases.And make the spacing of flat tube and flow distribution plate too little 212 only 1.45mm, not only resistance is large, and easily because flow disturbance (easily producing narrow slit effect when being less than 1mm) occurs flat tube length tolerance (± 0.5), causes performance inconsistency and decline.
When 3,8 word pipes are extruded, surface cannot the Combined Welding bed of material, causes welding difficulty.
4, flow distribution plate 209,210 adopts circular hole 218,220 centering to be arranged between two flat tube entrances 224,225, the inlet hole of flat tube makes the import department 214,215 on flat tube cross section both sides lack refrigerant because of the concentrated jet in the hole, garden of flow distribution plate, is unfavorable for that refrigerant fluid is laterally uniformly distributed the reduction with resistance on the cross section of flat tube.And because of incoming flow firing angle and path etc. do not produce before and after two pipes 224,225 uneven.The outer end 228 of flow distribution plate is positioned on the blanking cover 227 of collector, make assembling complicated, and easily produce leakage, and the other end 229 is positioned in the through hole of median septum 206, refrigerant incoming flow is divided into upper 216 times 217 two-way and enters this hole, two-way 221,222 interferes with each other, and causes first flat tube 223 refrigerant disappearance behind hole.The first hole 218 of afterbody of flow distribution plate uses onesize hole, garden, and the distance from tail end does not limit again, and therefore the normal suppression to dense refrigerant is ineffective, easily causes afterbody refrigerant excessive.Pitch-row, aperture, hole count, all without fixed number, both cannot be carried out rationed to the refrigerant of gradation unequal, and also make design have no basis.The symmetric design 219 also easy wrongly installed cavity in cross section, easily causes losing efficacy.
5, for above-mentioned reasons, refrigeration performance is lower than similar imported product.
Summary of the invention
The purpose of this utility model is to provide a kind of refrigeration performance to meet or exceed similar imported product, and production technology is simple, steady quality, investment is little, cost is low parallel-flow evaporator header.
The technical solution of the utility model is: in described header section, muscle top is provided with lateral bore, described endoporus is provided with group and covers sealing, on described header, flat tube insert division is the thick intermediate thin shapes in two ends, the inserting surface of described flat tube is provided with weld tabs, this header also comprises lower header and flow distribution plate, in described lower header, an access opening only established by refrigerant inlet dividing plate, described flow distribution plate is provided with multiple length, the complex through hole that circle superposes is as the dispensing orifice of refrigerant, every hole supplies two flat tubes, dispensing orifice center is not equidistant with two flat tube mouths of pipe, but deflection carrys out the flat tube mouth 1mm of flow path direction, described flow distribution plate utilizes location, long limit in partition and flat tube pipe, cross section is L-shaped, the parting seal of header all adopts dividing plate, described flow distribution plate uropore is designed to strip 315, aisle spare is 17mm
2left and right, the total valid circulation area of aisle spare/collector is 0.07, hydraulic diameter 0.8mm, and apart from tail end 13mm-23mm.
Processing cross-drilled hole is bored in the invention that the utility model is innovated for the defect of prior art, not etc. flat tube insertion depth does not fall in wall thick technique, weld tabs is pasted on pore surface in advance, flow distribution plate adopts composite holes and the new technology such as subregion quantitative positioning and optimizing parameter supply refrigerant.Can make refrigerant Uniform Flow in evaporimeter, flow resistance reduces, the homogeneous temperature of the outlet air surface of evaporimeter, for refrigerating capacity rises to can level beautiful compared with similar imported product or highlyer to lay a good foundation.Stable performance, structure is simple simultaneously, and processing quality is reliable, and cost is low, and invest little, generalization degree is high.A promising high-end product of can yet be regarded as in evaporimeter.
Accompanying drawing explanation
Fig. 1, refrigerant flow direction schematic diagram;
Fig. 2, the front view of prior art parallel-flow evaporator;
Fig. 3, the lower header top view of prior art parallel-flow evaporator;
Fig. 4, the upper header upward view of prior art parallel-flow evaporator;
Fig. 5, the lower header profile of prior art parallel-flow evaporator;
Fig. 6, prior art parallel-flow evaporator lower header partition and flow distribution plate position;
Fig. 7, the flow distribution plate figure of prior art parallel-flow evaporator;
Fig. 8, the lower header refrigerant flow schematic diagram of prior art parallel-flow evaporator;
Fig. 9, the master of parallel-flow evaporator of the present invention, side view;
Figure 10,8 word tube section figure of parallel-flow evaporator of the present invention;
Figure 11, lower header assembly profile on parallel-flow evaporator of the present invention;
Figure 12, lower header weld tabs sectional drawing on parallel-flow evaporator of the present invention;
Figure 13, header figure on parallel-flow evaporator of the present invention;
Figure 14, on parallel-flow evaporator of the present invention, header covers figure with group;
Figure 15, parallel-flow evaporator lower header assembly figure of the present invention;
Figure 16, parallel-flow evaporator lower header flow distribution plate figure of the present invention;
Figure 17, lower header dividing plate figure on parallel-flow evaporator of the present invention;
Detailed description of the invention
A kind of parallel-flow evaporator header, in collector section, muscle 301 top 302 place, removes cross machine endoporus 303 by the method for riding brill from outside, and covers 304 sealings with group after processing.Make it greatly to increase circulation area under the prerequisite of proof strength, can adjust arbitrarily within the scope of 0-40mm2 and frock need not be changed, not only reduce flow resistance, improve the stability of quality, also reduce investment.
Make full use of the advantage that Extrusion Process of Aluminum Alloy Profile processing wall thickness can change flexibly, flat tube insert division is designed to thick 305 intermediate thin 306 in two ends, under the prerequisite ensureing two ends weld length, reduce flat tube insertion depth, its gross area that effectively circulates reaches 254mm
2left and right, accounts for collector inner chamber plane of structure and amasss 318mm
280%, improve 7 percentage points.Absolute value improves 5%(profile than prior art and reduces in addition), and make the distance 318 of flat tube end and flow distribution plate reach 2mm, ensure that and not occur narrow slit effect within the scope of flat tube length tolerance.Greatly reduce resistance and the stability that improve work.
The inserting surface of flat tube 307 is sticked weld tabs 308 with viscosity brazing flux in advance before punching pore, disposablely when punching pore the flat pipe hole on weld tabs is washed into 309 simultaneously, ensure that the flat pipe hole on weld tabs is close to flat tube, and don't increase weld tabs mould and technique.Overcome the problem that extruded tube welding is difficult.
A refrigerant inlet dividing plate 310 only access opening in lower header, area is 93.5mm
2, avoid the interference that shunting distributes refrigerant.About total valid circulation area=0.368 of separator channels area/collector, hydraulic diameter about 2.7mm.Partition board hole should meet the demand of downstream to refrigerant, ensures that back pressure is set up in upstream again, in order to evenly to go up the refrigerant throughput of a flow process flat tube, therefore will have suitable resistance.Under this conflicting requirement, the optimization of this parameter is then very crucial.
The complex through hole 311,312,313,314 that flow distribution plate adopts length, garden superposes is as the dispensing orifice of refrigerant.Make the inlet hole of the flat tube not concentrated jet in hole, reason garden and the hole on both sides lacks refrigerant 316, be unlikely to again because simple homalographic elongated hole adds the resistance in hole; Every hole supplies 2 flat tubes, but center, hole is not equidistant with 2 mouths of pipe, but deflection carrys out the nearly about 1mm319 of flat tube mouth of flow path direction.With make incoming flow because of firing angle wait produce uneven reduction.Flow distribution plate utilizes location, long limit in partition 310,320 and pipe, and cross section L-shaped 317, is convenient to mistake proofing.Afterbody 321 is outer visible at partition 320, is convenient to visual management.The parting seal of header all adopts dividing plate 318,320,310, and without blanking cover, simple and reliable, easy for installation, cost is low.
Flow distribution plate uropore is designed to strip 315, and aisle spare is 17mm
2left and right, about total valid circulation area=0.07 of aisle spare/collector, hydraulic diameter about 0.8mm, and apart from the about 13mm-23mm distance of tail end.This hole is the main refrigerant supply orifice that afterbody 3-4 props up flat tube.When ensureing that afterbody flat tube has enough refrigerants to supply, the excessive phenomenon of dense refrigerant can be suppressed.2nd, 3, the 4 every hole path areas in hole 312,313,314 are 27mm
2left and right, about aisle spare/total valid circulation area=0.1, the supply orifice of 6 flat tubes in hydraulic diameter about 1.23mm, Shi Bannong refrigerant district, when ensureing that this part flat tube has enough refrigerants to supply, can suppress the excessive phenomenon of half dense refrigerant.Remaining every hole 311 single hole aisle spare is 38mm
2left and right, about aisle spare/total valid circulation area=0.15, hydraulic diameter about 1.58mm is the supply orifice of remaining flat tube (6-18 props up), can reach at most 18 flat tubes.The flat tube that can ensure in light refrigerant district like this has the supply of enough refrigerants, and can give security for dense refrigerant flows backward again, the selection of parameter is also very important.Meanwhile, this part is also the place of the product size adjustment of different size, can add and subtract in the scope in 3-7 hole.The product of different size can be produced on same pair of mould, make mould generalization.
Claims (1)
1. a parallel-flow evaporator header, it is characterized in that: in described header section, muscle top is provided with lateral bore, described endoporus is provided with group and covers sealing, on described header, flat tube insert division is the thick intermediate thin shapes in two ends, the inserting surface of described flat tube is provided with weld tabs, this header also comprises lower header and flow distribution plate, in described lower header, an access opening only established by refrigerant inlet dividing plate, described flow distribution plate is provided with multiple length, the complex through hole that circle superposes is as the dispensing orifice of refrigerant, every hole supplies two flat tubes, dispensing orifice center is not equidistant with two flat tube mouths of pipe, but deflection carrys out the flat tube mouth 1mm of flow path direction, described flow distribution plate utilizes location, long limit in partition and flat tube pipe, cross section is L-shaped, the parting seal of header all adopts dividing plate, described flow distribution plate uropore is designed to strip 315, aisle spare is 17mm
2left and right, the total valid circulation area of aisle spare/collector is 0.07, hydraulic diameter 0.8mm, and apart from tail end 13mm-23mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520132286.9U CN204854080U (en) | 2015-03-09 | 2015-03-09 | Parallel -flow evaporator pressure manifold |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520132286.9U CN204854080U (en) | 2015-03-09 | 2015-03-09 | Parallel -flow evaporator pressure manifold |
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| CN204854080U true CN204854080U (en) | 2015-12-09 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949754A (en) * | 2017-03-02 | 2017-07-14 | 南京航空航天大学 | Small micro-channel heat exchanger and heat-exchange method |
| CN110455015A (en) * | 2019-08-02 | 2019-11-15 | 合肥美的电冰箱有限公司 | A kind of parallel-flow heat exchanger and electrical equipment |
| CN112469954A (en) * | 2018-06-22 | 2021-03-09 | 法雷奥热交换公司 | Header tank for heat exchanger with thermal decoupling |
-
2015
- 2015-03-09 CN CN201520132286.9U patent/CN204854080U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106949754A (en) * | 2017-03-02 | 2017-07-14 | 南京航空航天大学 | Small micro-channel heat exchanger and heat-exchange method |
| CN112469954A (en) * | 2018-06-22 | 2021-03-09 | 法雷奥热交换公司 | Header tank for heat exchanger with thermal decoupling |
| CN112469954B (en) * | 2018-06-22 | 2022-06-21 | 法雷奥热交换公司 | Header tank for heat exchanger with thermal decoupling |
| CN110455015A (en) * | 2019-08-02 | 2019-11-15 | 合肥美的电冰箱有限公司 | A kind of parallel-flow heat exchanger and electrical equipment |
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