CN101038134A - Heat exchanger for heat pump - Google Patents
Heat exchanger for heat pump Download PDFInfo
- Publication number
- CN101038134A CN101038134A CN 200710027784 CN200710027784A CN101038134A CN 101038134 A CN101038134 A CN 101038134A CN 200710027784 CN200710027784 CN 200710027784 CN 200710027784 A CN200710027784 A CN 200710027784A CN 101038134 A CN101038134 A CN 101038134A
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- heat exchanger
- fin
- water
- heat pump
- condensed water
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 81
- 238000010257 thawing Methods 0.000 claims abstract description 22
- 230000007246 mechanism Effects 0.000 claims abstract description 8
- 230000000694 effects Effects 0.000 abstract description 20
- 238000007599 discharging Methods 0.000 abstract description 3
- 230000000903 blocking effect Effects 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 description 9
- 230000005484 gravity Effects 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000006116 polymerization reaction Methods 0.000 description 2
- 239000003507 refrigerant Substances 0.000 description 2
- 238000010008 shearing Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000007791 dehumidification Methods 0.000 description 1
- 230000002708 enhancing effect Effects 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
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- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The heat exchanger for heat pump disclosed in the present invention includes collecting pipes set in level direction, flat pipes vertically mounted among the collecting pipes and connected with the collecting pipes, and fins inserted among the collecting pipes in horizontal direction. The fins include multiple cell radiating ribs among the flat pipes. Each cell radiating rib includes several staggered and protruding arched bridge pieces, two guide pieces disposed on two sides of the arched bridge pieces and connected to the ends of the bridge pieces, water preventing wale disposed at the edge of the front end of the guide pieces, and a discharging mechanism disposed in front of the guide pieces for discharging the condensed water or defrosting water downward. The present invention can discharge the condensed water or defrosting water in time, thereby effectively avoid the condensed water or defrosting water blocking wind passage and reduces wind resistance. Because the condensed water or defrosting water is discharged in time, the frost amount is then reduced. Furthermore, the staggered and protruding arched bridge pieces on the surface of cell radiating piece can reduce wind resistance, disturb temperature border layer, reinforce the mixture of air flow and enhance the heat exchanging effect.
Description
Technical field
The present invention relates to field of air conditioning, relate in particular to a kind of heat exchanger that uses flat tube.
Background technology
The tradition parallel-flow heat exchanger generally adopts the structure of flat tube and the stacked placement of corrugated fin.When this heat exchanger uses as the air source heat pump condenser, heat in the passage that a large amount of defrosting water capacity after the defrost easily form between fin and fin and gather, can't discharge, serious obstruct airflow road, increase air flow resistance, make simultaneously the frost layer long-pending more thick more easily, even freeze, reduce heat pump performance greatly.
The flat tube horizontal direction of tradition parallel-flow heat exchanger is provided with, and uses the common fault that the separatory inequality is then arranged as evaporimeter.In the recent period, some improved heat exchangers occur, flat tube is vertically placed, and the sheet type improves seldom.When this heat exchanger when cooling condition moves, the condensed water of separating out on the evaporator surface will be attached to evaporator surface, and accumulates in the passage, increases heat transfer resistance so greatly, influences the heat exchange efficiency of evaporimeter.Simultaneously, condensed water with the obstruct airflow road, increases the flow resistance of air owing to can't in time discharge, and has further influenced the heat exchange efficiency of evaporimeter, and condensed water also might be blown into indoorly when serious, causes evaporimeter unavailable.
In sum, all there is same problem in traditional parallel-flow heat exchanger as condenser and evaporimeter use the time: condensed water or defrosting water easily adhere to and stop up the air channel between fin, increase windage; Or adhere at the refrigerant pipe outer surface, and attached to the thermal resistance that produces on the tube-surface than big attached to the thermal resistance influence that produces on the fin, the therefore heat exchange efficiency of serious reduction heat exchanger.
United States Patent (USP) 6,964, a kind of heat pump outdoor heat exchanger is disclosed for 296B2 number, be devoted to solve the condensed water queueing problem, there is a serious problem in the heat exchanger of its exposure: because cross force is bigger in the heat exchanger, condensing drip is directly blown out heat exchanger easily, rather than discharges downwards under the effect of gravity.This case applicant provides a kind of novel heat exchanger for heat pump that can get rid of condensed water in No. 200620067330.3 patent application of China, but the technology that discloses in this application difficult realization on processing technology.
In addition, above-mentioned prior art has but been ignored the concrete improvement on the sheet type when considering the condensed water queueing problem, with further enhancing heat exchange effect, reach energy-efficient purpose.
Summary of the invention
The objective of the invention is at the deficiencies in the prior art and defective, a kind of heat exchanger for heat pump is provided, condensed water or defrosting water on the heat exchanger are in time discharged, change existing heat exchanger condensed water or defrosting water and get rid of not smooth situation, reduce frosting degree, prevent to freeze; And improve the sheet type, and avoid under the bigger situation of wind-force, having condensed water or defrosting water to spill, reduce windage simultaneously, strengthen the heat exchange effect, to reach energy-efficient purpose.
The objective of the invention is to realize by following technical scheme:
A kind of heat exchanger for heat pump, comprise horizontally disposed header, be vertically set on the flat tube that is communicated with header between the header, reach the fin that laterally is plugged between the header, fin comprises a plurality of unit fin, each unit fin is between flat tube and flat tube, it is characterized in that each unit fin comprises some arch bridge sheets that are staggered and prominent, be arranged on two flow deflectors that arch bridge sheet both sides are connected with each bridge sheet end, be arranged on the burr that blocks water at flow deflector front edge place, and be arranged on the current drainage mechanism that condensed water or defrosting water are discharged of being used for of flow deflector front end downwards.
Heat exchanger for heat pump provided by the invention both can be applied to evaporimeter, can be applied to condenser again, and cold-producing medium can evenly be shunted.Wherein, condensed water that arch bridge sheet top forms or defrosting water can flow to both sides along bridge sheet surface under surface tension effects, flow deflector place polymerization on fin both sides, unit, under the impetus of wind-force, constantly flow then to the unit cooling fin front end, the burr that blocks water of unit cooling fin front end setting can suppress spilling of condensed water or defrosting water, and the current drainage mechanism that is arranged on the unit cooling fin front end is with condensed water or defrosting water eductor condenser successfully.The present invention is than the beneficial effect of prior art: condensed water or defrosting water in time can be got rid of, thereby effectively be avoided condensed water or defrosting water blockage air channel, reduce windage, because condensed water or defrosting water in time got rid of, so frosting degree reduces thereupon; In addition, the arch bridge sheet that the unit fin surface upwards is staggered and prominent can effectively reduce windage, upsets temperature boundary layer, adds the mixing of air blast, strengthens the heat exchange effect.
Description of drawings
Fig. 1 is the front view of heat exchanger for heat pump provided by the invention;
Fig. 2 is the partial perspective view of the heat exchanger for heat pump that provides of embodiment one;
Fig. 3 is the partial top view of the heat exchanger for heat pump that provides of embodiment one;
Fig. 4 is the vertical view of the fin in the heat exchanger for heat pump that provides of embodiment one;
Fig. 5 is the side view of the fin in the heat exchanger for heat pump that provides of embodiment one;
Fig. 6 is the cutaway view of the fin in the heat exchanger for heat pump that provides of embodiment one;
Fig. 7 is the partial enlarged drawing of Fig. 6;
Fig. 8 is the cutaway view of the fin in the heat exchanger for heat pump that provides of embodiment two;
Fig. 9 is the vertical view of the fin in the heat exchanger for heat pump that provides of embodiment three;
Figure 10 is the cutaway view of the fin in the heat exchanger for heat pump that provides of embodiment three;
Figure 11 is the vertical view of the fin in the heat exchanger for heat pump that provides of embodiment four;
Figure 12 is the cutaway view of the fin in the heat exchanger for heat pump that provides of embodiment four;
Figure 13 is the vertical view of the fin in the heat exchanger for heat pump that provides of embodiment five;
Figure 14 is the partial enlarged drawing of Figure 13;
Figure 15 is the side view of the fin in the heat exchanger for heat pump that provides of embodiment five;
Figure 16 is the cutaway view of the fin in the heat exchanger for heat pump that provides of embodiment five.
The number in the figure explanation:
1. fin, 2. microchannel, 3. flat tube, 5. burr, 6. current drainage sheet, 7. arch bridge sheet block water, 8. flow deflector, 9. pitch of fins stator, 11. guiding gutters, the last header of 12a., 12b. lower header, S. condensed water or defrosting current direction, F. air intake direction, Q, q1, q2, q3, q11, q12, q111, q112. air flow.
The specific embodiment
As shown in Figure 1, heat exchanger for heat pump provided by the invention comprises header 12a, lower header 12b, some flat tubes 3, reaches some fins 1.Described header 12a, the lower header 12b of going up is horizontally disposed with, flat tube 3 vertical accesses are gone up between header 12a and the lower header 12b, fixedly connected with last header 12a, lower header 12b, and communicate with each other, many group fins 1 laterally are plugged between header 12a, the lower header 12b, each fin comprises a plurality of unit fin, and each unit fin is between flat tube and flat tube.
Describe a plurality of embodiment of fin in detail below in conjunction with accompanying drawing.
Embodiment one
Please in conjunction with consulting Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6 and Fig. 7, in the present embodiment one, each unit fin comprises some arch bridge sheets 7 that are staggered and prominent, arch bridge sheet both sides respectively are provided with flow deflector 8, flow deflector 8 is connected with the end of each bridge sheet, make condensed water or defrosting water that arch bridge sheet top forms under surface tension effects, to flow flow deflector place polymerization to both sides on fin both sides, unit along bridge sheet surface.Flow deflector 8 front edge places are provided with the burr 5 that blocks water, and flow deflector 8 front ends also are provided with and are used for condensed water or the downward current drainage sheet 6 of discharging of defrosting water, and current drainage sheet 6 is arranged on the opening part near the burr 5 that blocks water obliquely.Shown in Fig. 4,5,6, current drainage sheet 6 is downward-sloping recessed, and the edge is curved.The unit fin has pitch of fins stator 9, and the height of this pitch of fins stator 9 is greater than the height of the arbitrary arch bridge sheet 7 and the burr 5 that blocks water.
Below, the heat exchanger for heat pump that provides with embodiment one uses to example as evaporimeter introduces its operation principle.
Under cooling condition, cold-producing medium enters flat tube 3 via lower header 12b shunting, and the cold-producing medium that temperature is lower flows in the microchannel 2 of flat tube 3, and flat tube 3 outside wall surface and unit fin surface temperature are lowered.When humid air stream during through evaporimeter, carry out heat exchange with the outer surface of flat tube 3 and the surface of fin, and separate out condensed water from the teeth outwards, emit sensible heat and latent heat and by the cooling dehumidification.
The condensed water of separating out on flat tube 3 surfaces will lean on the gravity effect to flow downward along flat tube, the condensed water of separating out on arch bridge sheet 7 surfaces is flowing (direction is shown in arrow S among Fig. 3, Fig. 4) to flow deflector 8 along arch under the effect of surface tension and gravity, constantly flows to unit fin 1 front end (heat exchanger inboard) under the effect of air stream shearing force then; Autonomous the flowing downward along current drainage sheet 6 surfaces before no show blocks water burr 5 of part condensed water drained, and another part continues to flow forward under the effect of wind-force, reaches when blocking water burr 5 and is stopped, and backflows again and drains along the surface of current drainage sheet 6.
More than be the solution of condensed water queueing problem, go on to say the principle that it strengthens the heat exchange effect with this example below.Among the embodiment one, arch bridge sheet 7 comprises many group three arch bridge sheets that upwards are staggered and prominent (is a group as Fig. 5,7a, 7b, 7c shown in Figure 6).Air stream Q enters (as shown in Figure 7 from the left side, direction is with direction shown in the arrow F among Fig. 2), pass the surface of unit fin, be divided into disorderly air-flow q1, q2 and q3 (shown in Fig. 6,7) by left side first bridge sheet 7a, wherein disorderly air-flow q1, q2 be respectively from the upper and lower effluent mistake of bridge sheet 7a, and disorderly air-flow q3 only just can produce during through pitch of fins stator 9 places at air stream Q; Air-flow q1 through gap bridge sheet 7a upper portion is divided into disorderly air-flow q11 of two parts and q12 by next bridge sheet 7b, wherein disorderly air-flow q11 is divided into disorderly air-flow q111 of two parts and q112 again by bridge sheet 7c, the disorderly air-flow q12 bridge sheet 7b downside of flowing through fully mixes with disorderly air-flow q2 through gap bridge sheet 7a downside, and consequent air-flow mixes with the disorderly air-flow q112 of the bridge sheet 7c downside of flowing through again.Analyze from the mobility status of above air, the layout that each bridge sheet upwards is staggered and prominent can upset temperature boundary layer, adds the mixing of air blast, makes its abundant heat exchange, strengthens the heat exchange effect.
Therefore, this heat radiating fin structure can improve the situation that condensed water adheres at the refrigerant pipe outer surface in traditional heat radiating fin structure, can avoid condensed water to block the air channel, reduces windage; In addition, the arch bridge sheet of each unit fin surface for upwards being staggered and prominent can effectively reduce windage, upsets temperature boundary layer, adds the mixing of air blast, strengthens the heat exchange effect.
Operation principle when the heat exchanger for heat pump that embodiment one provides uses as heat exchanger for heat pump is as follows:
In possessing the heat pump heating operation of frosting condition, when entering Defrost operation, cold-producing medium is the condensation by heat release in heat exchanger; Liberated heat melts the frost of fin surface, the discharge principle of the discharge of defrosting water and condensed water identical (change over to heat before first startup blower fan).Because defrosting water can be drained smoothly, effectively suppress next frosting cycle frost layer and thicken, also solved the problem of freezing simultaneously.The principle that reduces windage when heating with refrigerating operaton is identical, can upset temperature boundary layer equally, adds the mixing of air blast, strengthens the heat exchange effect.
Embodiment two
As shown in Figure 8, the difference of present embodiment and embodiment one is that in the present embodiment, the arch bridge sheet of unit fin includes two arch bridge sheet 7a and 7b that make progress interlaced by many groups.
Embodiment three
As Fig. 9, shown in Figure 10, the difference of present embodiment and embodiment one is, in the present embodiment, the front end of two flow deflectors 8 of each unit fin fuses by a plain film, the burr 5 that blocks water is arranged on the front edge place of plain film and two flow deflectors 8, and current drainage sheet 6 is arranged on the opening part near the burr 5 that blocks water obliquely.The condensed water of arch bridge sheet 7 tops flows to flow deflector 8 under the effect of surface tension and gravity, runs into the burr 5 that the blocks water heat exchanger that can't fly out, and is drained downwards by current drainage sheet 6 places.
Embodiment four
As Figure 11, shown in Figure 12, the difference of present embodiment and embodiment two is that in the present embodiment, the current drainage sheet 6 of each unit fin is straight shape, and the direction that tilts and embodiment's two is opposite.Its operation principle repeats no more with embodiment one herein.
Embodiment five
As Figure 13, Figure 14, Figure 15, shown in Figure 16, the difference of present embodiment and embodiment two is that in the present embodiment, the front end of each unit fin is provided with the guiding gutter 11 and the burr 5 that blocks water.Described guiding gutter 11 is the steady depression that the downward punching press of flow deflector front end forms, and its degree of depth is less than the distance between two fin.Wherein, the fe section is set to circular arc among the figure, so that the even water conservancy diversion of the condensed water of all directions; Point g, some b are the contact point of unit fin straight portion and tube wall, point d is a bit on the unit cooling fin front end circular arc, it is the opening gbd segmental arc separated into two parts of guiding gutter 11, wherein arc gb section contacts with tube wall, arc bd section and tube wall noncontact, flow out from notch with the condensed water that guarantee to flow in the guiding gutter, rather than overflow the burr 5 that blocks water and drain.Among Figure 13, L1 is the lateral separation of unit fin and tube wall contact portion, i.e. distance between basic point a and the some b; L2 is the distance of flat tube straight portion apart from basic point a, and promptly the distance between basic point a and the some c is provided with L1＜L2.
Equally, the condensed water of separating out on flat tube 3 surfaces will lean on the gravity effect to flow downward along flat tube, the condensed water of separating out on arch bridge sheet 7 surfaces flows to unit fin flow deflector 8 along arch under the effect of surface tension and gravity, under the effect of air stream shearing force, constantly flow then to unit cooling fin front end (heat exchanger inboard), through the drainage of guiding gutter 11, discharge at the opening part (bd section) of guiding gutter; Because L1＜L2, condensed water rely on the gravity effect to drain along tube wall after guiding gutter flows out.Condensed water is drained along tube wall can avoid splashing of condensed water, accelerates the eliminating speed of condensed water simultaneously.
The various embodiments described above only in order to fully to disclose technical scheme of the present invention, for those of ordinary skills, based on spirit of the present invention, without any modification or partial replacement of creative work, all should be encompassed in the claim scope of the present invention.For example, the arch bridge sheet on the unit fin can be several, and several arch bridge sheets can be divided into some groups, comprises several arch bridge sheets in every group, and respectively organize the arch bridge sheet make progress interlaced mode can be for multiple; In addition, the sheet type of current drainage sheet can be for multiple, and direction that it is obliquely installed and angle also can have various ways, and similarly, the shape of guiding gutter can be circular arc or stripe-shaped; In addition, the shape of unit cooling fin front end can be an arc, straight or other shapes.
Claims (6)
1. heat exchanger for heat pump, comprise horizontally disposed header, be vertically set on the flat tube that is communicated with header between the header, reach the fin that laterally is plugged between the header, fin comprises a plurality of unit fin, each unit fin is between flat tube and flat tube, it is characterized in that each unit fin comprises some arch bridge sheets that are staggered and prominent, be arranged on two flow deflectors that arch bridge sheet both sides are connected with each bridge sheet end, be arranged on the burr that blocks water at flow deflector front edge place, and be arranged on the current drainage mechanism that condensed water or defrosting water are discharged of being used for of flow deflector front end downwards.
2. heat exchanger for heat pump as claimed in claim 1 is characterized in that, described some arch bridge sheets comprise three interlaced outstanding arch bridge sheets that make progress of many groups.
3. heat exchanger for heat pump as claimed in claim 1 is characterized in that, described some arch bridge sheets comprise two interlaced outstanding arch bridge sheets that make progress of many groups.
4. as claim 1,2 or 3 any described heat exchanger for heat pump, it is characterized in that described current drainage mechanism is the current drainage sheet, the current drainage sheet is obliquely installed at the opening part near the burr 5 that blocks water.
5. as claim 1,2 or 3 any described heat exchanger for heat pump, it is characterized in that described current drainage mechanism is for being molded over two recessed guiding gutters of two flow deflector front ends respectively, this guiding gutter has the opening of a draining downwards.
6. as claim 1,2 or 3 any described heat exchanger for heat pump, it is characterized in that described fin has the distance between commutator segments fixed mechanism, the height of this distance between commutator segments fixed mechanism is greater than the height of the arbitrary arch bridge sheet and the burr that blocks water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100277847A CN100523696C (en) | 2007-04-28 | 2007-04-28 | Heat exchanger for heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2007100277847A CN100523696C (en) | 2007-04-28 | 2007-04-28 | Heat exchanger for heat pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101038134A true CN101038134A (en) | 2007-09-19 |
| CN100523696C CN100523696C (en) | 2009-08-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2007100277847A Expired - Fee Related CN100523696C (en) | 2007-04-28 | 2007-04-28 | Heat exchanger for heat pump |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100523696C (en) |
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| CN102012134A (en) * | 2010-10-19 | 2011-04-13 | 广东美的制冷设备有限公司 | Heat exchanger favorable for drainage |
| CN102192673A (en) * | 2010-03-16 | 2011-09-21 | 乐金电子(天津)电器有限公司 | Flat-tube heat exchanger structure and assembling method thereof |
| CN102889820A (en) * | 2012-10-15 | 2013-01-23 | 三花控股集团有限公司 | Condensed water diversion structure for heat exchanger as well as heat exchanger |
| CN103697632A (en) * | 2013-12-10 | 2014-04-02 | 无锡微研有限公司 | Parallel flow fin stator distance bending part and bending mechanism thereof |
| CN103797326A (en) * | 2011-06-16 | 2014-05-14 | 日本轻金属株式会社 | Drainage structure for corrugated-fin heat exchanger |
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| CN102889820A (en) * | 2012-10-15 | 2013-01-23 | 三花控股集团有限公司 | Condensed water diversion structure for heat exchanger as well as heat exchanger |
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| CN103697632A (en) * | 2013-12-10 | 2014-04-02 | 无锡微研有限公司 | Parallel flow fin stator distance bending part and bending mechanism thereof |
| CN104215093A (en) * | 2014-08-22 | 2014-12-17 | 苏州矩道汽车科技有限公司 | Low wind resistance radiator |
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| CN110476034A (en) * | 2018-03-13 | 2019-11-19 | 日立江森自控空调有限公司 | Heat exchanger and the air conditioner for having the heat exchanger |
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