CN201876184U - Collecting pipe and heat exchanger with same - Google Patents
Collecting pipe and heat exchanger with same Download PDFInfo
- Publication number
- CN201876184U CN201876184U CN2010205173146U CN201020517314U CN201876184U CN 201876184 U CN201876184 U CN 201876184U CN 2010205173146 U CN2010205173146 U CN 2010205173146U CN 201020517314 U CN201020517314 U CN 201020517314U CN 201876184 U CN201876184 U CN 201876184U
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- header
- tube wall
- heat exchange
- orifice plate
- exchange pipe
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- 230000000903 blocking effect Effects 0.000 claims description 14
- 230000015572 biosynthetic process Effects 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 208000002925 dental caries Diseases 0.000 claims 1
- 239000003507 refrigerant Substances 0.000 abstract description 26
- 230000000694 effects Effects 0.000 abstract description 7
- 238000009826 distribution Methods 0.000 abstract description 3
- 238000009827 uniform distribution Methods 0.000 abstract description 3
- 239000011148 porous material Substances 0.000 abstract 3
- 239000007788 liquid Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 6
- 230000009471 action Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 238000010586 diagram Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 230000005494 condensation Effects 0.000 description 2
- 238000009833 condensation Methods 0.000 description 2
- 239000002826 coolant Substances 0.000 description 2
- 238000004904 shortening Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 238000004378 air conditioning Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003475 lamination Methods 0.000 description 1
- 238000005057 refrigeration Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
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Abstract
The utility model provides a heat exchanger, its is including flat pipe of heat transfer, pressure manifold, and this heat exchanger all can reach the effect of evenly distributed refrigerant when using as evaporimeter or condenser, and then improves the heat transfer performance of evaporimeter or condenser. This pressure manifold includes: the upper collecting pipe wall, the lower collecting pipe wall and the distributing pore plate for uniform distribution are arranged on the distributing pore plate, and the distributing pore plate is inserted between the upper collecting pipe wall and the lower collecting pipe wall and surrounds the upper collecting pipe wall and the lower collecting pipe wall to form an upper cavity and a lower cavity. Refrigerant gas firstly enters the lower cavity, flows through the shunting holes, enters the upper cavity and finally enters the heat exchange flat tube. Due to the shunting effect of the shunting hole plate, the flow distribution of refrigerant gas entering the heat exchange flat tube is uniform, the uniform and sufficient heat exchange effect is achieved, and the overall heat exchange performance of the heat exchanger is improved.
Description
Technical field
The utility model relates to the air-condition heat exchanger field, refers in particular to a kind of header and has the heat exchanger of this header.
Background technology
When micro-channel heat exchanger used as evaporimeter, the import refrigerant was generally gas-liquid two-phase.As shown in Figure 1, existing micro-channel heat exchanger directly is connected with flat heat exchange pipe usually with header, without any the shunting measure, enter header after the gas-liquid two-phase lamination obvious, cause entering the refrigerant maldistribution of each flat heat exchange pipe, the heat exchanger heat exchange property is relatively poor.And, because of heat pump has refrigeration and heats two kinds of operational modes, so the off-premises station heat exchanger relates to condenser and evaporimeter is changed use mutually.For the single process heat exchanger, when using as condenser, entering the mouth is overheated gas, adopts existing micro-channel heat exchanger structure, the same problem of dividing the gas inequality that exists; When using as evaporimeter, entering the mouth is gas-liquid two-phase, then has the uneven problem of shunting.For the multipaths heat exchanger, not only there is the uneven situation of shunting in heat exchanger entrance, has the uneven problem of shunting equally at the middle part of heat exchanger.Therefore, for applying micro-channel heat exchanger at family expenses or business air conditioner field as early as possible, be badly in need of solving the branch flow problem of micro-channel evaporator.
Occurred the dividing technology of header interpolation isocon in recent years, in fact, this technology has certain limitation.At first, for realizing even shunting, need offer the through hole of not equidistant or unequal-area on isocon, technical to offer the difficulty of the through hole of this non-equidistant homalographic and macropore at isocon higher; In addition, if keep the diameter of former heat exchanger header constant, then the restricted diameter of isocon is the intensity of assurance isocon, and the area of the area of single tap hole and total tap hole is all unsuitable excessive, so the corresponding increase of the flow resistance of refrigerant in isocon; If increase the tap hole area on the isocon, then need increase the diameter of isocon, the diameter of header also needs corresponding increasing, and the refrigerant flow rate in the pipe then can reduce thus, and has increased material cost.
Can reflect thus, the utility model provides a kind of header and has the heat exchanger of this header, and it can make the refrigerant in the header be assigned in the flat heat exchange pipe, and the inner refrigerant of heat exchanger is evenly distributed, and has improved the heat exchange property of heat exchanger.
The utility model content
The utility model provides a kind of header and has the heat exchanger of this header, and it can be distributed in the flat heat exchange pipe cold media gas by changing the structure of header uniformly, has improved the heat exchange property of heat exchanger.
The utility model is achieved in that
A kind of header, it includes the afflux tube wall, and is used to seal the blocking cap of this afflux tube wall, and this afflux tube wall is provided with a plurality of connecting holes that are used to connect flat heat exchange pipe, and this afflux tube wall is divided into: go up afflux tube wall and lower header tube wall; This header also comprises and is used for the evenly shunting orifice plate of shunting, and this shunting orifice plate is provided with tap hole, and this shunting orifice plate is interspersed between afflux tube wall on this, the lower header tube wall, and with this on afflux tube wall, lower header tube wall center on formation upper cavity and lower chamber.Cold media gas at first enters lower chamber, and the tap hole of flowing through is entering upper cavity, enters flat heat exchange pipe at last.Because the shunting action of shunting orifice plate makes that the cold media gas assignment of traffic that enters in the flat heat exchange pipe is even, reaches evenly and the fully effect of heat exchange, improves the whole heat exchange property of heat exchanger.
Preferably, fix in order to make this blocking cap and this flow distribution plate, this blocking cap is provided with through hole, and the end of this shunting orifice plate is provided with fixed part, and this through hole cooperates with this fixed part fixes this shunting orifice plate.
Preferably, this header also includes positioner, and it is used to limit the insertion depth of this flat heat exchange pipe, its selectable upside of this shunting orifice plate, the end of going up the afflux tube wall or end of lower header tube wall laterally be located at.
For this header is cooperated with double flat heat exchange pipe, should go up afflux tube wall or this lower header tube wall is provided with two rows and is used for the connecting hole that cooperates with flat heat exchange pipe, this two rows flat heat exchange pipe is parallel or be the angle setting mutually, be provided with dividing plate in this upper cavity or this lower chamber, make this upper cavity or this lower chamber be divided into left and right two parts, these left and right two parts and left chamber of formation and right chamber.
Alternatively be, tap hole on this shunting orifice plate be shaped as circle, ellipse, rectangle, scrambling shape or its both combination arbitrarily, and the area of these a plurality of tap holes is unequal, it is comparatively even to make that the gas-liquid two-phase refrigerant that enters each heat exchanger flat tube distributes, and further improves the heat exchange efficiency of heat exchanger.
Alternatively be, side of afflux tube wall, lower header tube wall connects on this, and opposite side forms a long and narrow vertical masonry joint.
Preferably, cross section of afflux tube wall, lower header tube wall is respectively arc, rectangle or its both combination arbitrarily on this.Than prior art, the variation of header cross sectional shape helps dwindling the cross-sectional area of header, improves the flow velocity of refrigerant in the header, strengthens heat-exchange performance; Help shortening the length that flat heat exchange pipe is inserted header; Simultaneously, help saving the material cost of flat heat exchange pipe and header.
The utility model also provides a kind of heat exchanger, it includes flat heat exchange pipe, the upper and lower end of this flat heat exchange pipe inserts the connecting hole of this header respectively, inlet tube, outlet, and, partly or entirely contain the shunting orifice plate in this header as above each described header, this heat exchanger all can reach the effect of uniform distribution refrigerant as evaporimeter or condenser use the time, and then improves the heat exchange property of evaporimeter or condenser.
Preferably, this heat exchanger contains one or more flow processs.
Technique effect of the present utility model:
A kind of header of the utility model and have the heat exchanger of this header, it is simple in structure, cost is low, can make the refrigerant distributed uniform in the flat heat exchange pipe, has good shunting action; Header is not only applicable to the single process heat exchanger and is applicable to the heat exchanger of multipaths, all has good shunting action when heat exchanger uses as evaporimeter or condenser.
Description of drawings
Fig. 1 prior art heat exchanger structural representation of header;
Fig. 2 is the structural representation of the header of the utility model embodiment one;
Fig. 3 is the exploded view of the header of the utility model embodiment one;
Fig. 4 is the side view of the header of the utility model embodiment one;
Fig. 5 is the blocking cap of the utility model embodiment one and the structural representation of shunting orifice plate;
Fig. 6 is the cross-sectional view of the shunting orifice plate of the utility model embodiment one;
Fig. 7 is the heat exchanger partial schematic diagram that contains the utility model header;
Fig. 8 is the change curve of the tap hole area of shunting orifice plate;
Fig. 9 is the side view of the header of the utility model example two;
Figure 10 is the side view of the header of the utility model example three;
Figure 11 is the structural representation of the shunting orifice plate cross section of the utility model example three;
Figure 12 is the side view of the header of the utility model example four;
Figure 13 is the side view of the header of the utility model example five;
Figure 14 is the split structural representation of the header of the utility model example six;
Figure 15 is a tap hole plate structure schematic diagram in the utility model;
Figure 16 is one of micro-channel heat exchanger structural representation that has the utility model header;
Figure 17 be have the utility model header the micro-channel heat exchanger structural representation two.
The specific embodiment
Below in conjunction with accompanying drawing embodiment of the present utility model is elaborated:
Embodiment one:
To shown in Figure 7, wherein, Fig. 7 has illustrated the combine schematic diagram of the utility model header with heat exchanger tube as Fig. 2.Header comprises: go up afflux tube wall 2, lower header tube wall 3, shunting orifice plate 4.Wherein, laterally be provided with a plurality of connecting holes 1 on this on the afflux tube wall 2, this connecting hole 1 is used to connect flat heat exchange pipe 6 (as Fig. 4 or shown in Figure 7), and this shunting orifice plate 4 is located on this between afflux tube wall 2 and this lower header tube wall 3; This lower header tube wall 3 is surrounded on afflux tube wall 2 on this, these shunting orifice plate 4 outsides, boss 31 location by lower header tube wall 3 both sides, should go up header 2, lower header 3, this shunting orifice plate 4 and fix by welding manner, afflux tube wall 2, this lower header tube wall 3 center on formation upper cavity A, lower chamber B with this shunting orifice plate 4 respectively this on.This shunting orifice plate 4 is provided with a plurality of tap holes 5 (as shown in Figure 3), and as shown in Figure 7, cold media gas at first enters lower chamber B, and this tap hole 5 of flowing through enters upper cavity A again, enters flat heat exchange pipe 6 at last.Because the shunting action of shunting orifice plate 4 makes that the cold media gas assignment of traffic that enters in the flat heat exchange pipe 6 is even, reaches evenly and the fully effect of heat exchange, improves the whole heat exchange property of heat exchanger.
As shown in Figure 5, this header also comprises blocking cap 7, the centre of this blocking cap 7 offers through hole 71, the end of this shunting orifice plate 4 is provided with fixed part 42, the area of preferred this blocking cap 7 is slightly less than the cross-sectional area of this header, after this through hole 71 being cooperated with this fixed part 42 blocking cap 7 is fixed in this shunting orifice plate 4, blocking cap 7 can be to this header sealing.
As Fig. 4 or shown in Figure 6, laterally be provided with positioner 8 on this shunting orifice plate 4, this positioner 8 is two fins, distance between this two fin is less than the width of this flat heat exchange pipe, when flat heat exchange pipe 6 is inserted from connecting hole 1, this two fin contacts with the bottom of this flat heat exchange pipe 6, be able to support this flat heat exchange pipe 6, and the height of fin determines the insertion depth of this flat heat exchange pipe 6.
Cross section of going up afflux tube wall 2, lower header tube wall 3 described in the utility model is respectively circle, ellipse, rectangle or its both combination arbitrarily, and present embodiment is preferably gone up afflux tube wall 2, lower header tube wall 3 is ellipse.Than prior art, the variation of header cross sectional shape helps dwindling the cross-sectional area of header, improves the flow velocity of refrigerant in the header, strengthens heat-exchange performance; Help shortening the length that flat heat exchange pipe is inserted header; Simultaneously, help saving the material cost of flat heat exchange pipe and header.
Alternative is that as shown in figure 15, the shape of the tap hole 5 on this shunting orifice plate 4 can be circle, ellipse, rectangle, scrambling shape or its both combination arbitrarily; The number of tap hole 5 is 1 macropore or a plurality of aperture, and these a plurality of holes can be arranged in a row or be arranged in many rows.As shown in Figure 8, the area of these a plurality of tap holes 5 is unequal, and at the less refrigerant entrance point of the too high and former dispense flow rate of refrigerant flow rate, tap hole 5 areas are bigger; Less at local tap hole 5 areas nearer from the refrigerant entrance point, that feed liquor is many originally, strengthen throttling; And relatively large from refrigerant arrival end local via area far away, that feed liquor is few originally.Via area is reasonably distributed, and it is comparatively even to make that the gas-liquid two-phase refrigerant that enters each heat exchanger flat tube distributes, and further improves the heat exchange efficiency of heat exchanger.The shape of cross section of last afflux tube wall 2 and lower header tube wall 3 can require to select according to the burst pressure and the heat exchange property of air-conditioning system, and the structural design of the upper and lower split of header makes the shape of header be not limited to circular channel, more can save material cost.
Embodiment two:
As shown in Figure 9.Embodiment two is that with the different of embodiment one shape of cross section of afflux tube wall 2 and this lower header tube wall 3 is a rectangle on this, and upward the end of afflux tube wall 2 bends inwards, and forms positioner 8, is used to limit flat heat exchange pipe and inserts the interior degree of depth of this header.The rectangle header of present embodiment helps dwindling the cross-sectional area of header passage, improves the flow velocity of the refrigerant in the header, in addition, along with the increase of the width of flat heat exchange pipe, the volume of header increases less, thereby can the economical with materials cost, save the space, be convenient to install.
Embodiment three:
As Figure 10 and shown in Figure 11.Embodiment three is with the different of embodiment one, the cross section of last afflux tube wall 2 and lower header tube wall 3 is inconsistent, the cross section of last afflux tube wall 2 is a rectangle, and the area of the cross section of lower header tube wall 3 is an arc, certainly, the cross section that also can be afflux tube wall on this is an arc, and the cross section of this lower header tube wall is a rectangle; As shown in figure 11, the top of this shunting orifice plate 4 is provided with the one identical positioner 8 with embodiment, and two sides of bottom surface have recess 41, and the two ends of this lower header 3 be able to be stuck in this recess 41, fixes by the mode of welding again.
Embodiment four:
As shown in figure 12.Embodiment four is that with the different of embodiment one afflux tube wall 2 is provided with two groups of independently connecting holes 1 on this, is provided with dividing plate 10 in this upper cavity A or this lower chamber B, and this dividing plate 10 is divided into left and right two parts with this upper cavity A or this lower chamber B, forms left chamber A
1With right chamber A
2, the corresponding two component discharge orifices 5 that are provided with on this shunting orifice plate 4 are communicated with these two groups of flat heat exchange pipe 6 respectively.Two groups of flat heat exchange pipe 6 are inserted in this header by this connecting hole 1, and these two groups of flat heat exchange pipe are parallel to each other.Preferably, this dividing plate 10 can be one-body molded with afflux tube wall 2 on this, or one-body molded with this shunting orifice plate 4.Cold media gas enters left chamber A from lower chamber B by different tap hole 5
1, right chamber A
2, enter corresponding flat heat exchange pipe 6 again, not only realized the purpose of coolant distribution, can realize the connection of two groups of flat heat exchange pipe simultaneously.
Embodiment five:
As shown in figure 13.Embodiment five is to have certain angle between these two groups of flat heat exchange pipe with the different of embodiment four.The cross section that should go up afflux tube wall 2 is an arc, positioner 8 is located at the two ends of this shunting orifice plate 4, the corner of flat heat exchange pipe 6 contacts with positioner 8, so the contact position of positioner 8 and flat heat exchange pipe is the inclined-plane, in two groups of oblique at an angle insertion headers of flat heat exchange pipe 6.Be provided with dividing plate 10 in this upper cavity A or this lower chamber B, this dividing plate 10 is divided into left and right two parts with this upper cavity A or this lower chamber B, forms left chamber A
1With right chamber A
2, the corresponding two component discharge orifices 5 that are provided with on this shunting orifice plate 4 are communicated with these two groups of flat heat exchange pipe 6 respectively.Two groups of flat heat exchange pipe 6 are inserted in this header by this connecting hole 1, and these two groups of flat heat exchange pipe are certain angle mutually.Preferably, this dividing plate 10 can be one-body molded with afflux tube wall 2 on this, or one-body molded with this shunting orifice plate 4.Cold media gas enters left chamber A from lower chamber B by different tap hole 5
1, right chamber A
2The described split type header structure of present embodiment is not only applicable to the double flat tube that changes, and is applicable to the bending-type heat exchanger, flexible design, and header takes up space less, and is easy for installation.
Embodiment six:
As shown in figure 14.Embodiment six is that with the different of embodiment one afflux tube wall 2 is connected with a side of lower header tube wall 3 on this, and opposite side forms a long and narrow vertical masonry joint 21, and the width of this vertical masonry joint 21 is slightly larger than the thickness of this shunting orifice plate 4; Fixed part 42 on the shunting orifice plate 4 is located at a side of these shunting orifice plate 4 ends, and shunting orifice plate 4 inserts in this header and the location by this vertical masonry joint 21; Have breach 72 on this blocking cap 7, this breach 72 cooperates with fixed part 42 on this shunting orifice plate 4, makes this fixed part 42 can just be stuck in this breach 72 places.
As shown in figure 16, it has illustrated header to be applied to the embodiment one of heat exchanger.In the present embodiment, the upper/lower terminal of flat heat exchange pipe 6 connects header respectively, and the inner pipeline section that divides of header contains shunting orifice plate 4, and by opening 73 two sections headers is communicated with.Cold media gas enters from lower header inlet tube 9a, the cold-producing medium of gas-liquid two-phase at first advances lower chamber B, the a plurality of tap holes 5 that pass then on the shunting orifice plate 4 enter each flat heat exchange pipe 6 that is connected with upper cavity A, flow to the header of upper end, via the flow through lower chamber B of header of the other end of the opening on the blocking cap 7 73, after process is shunted redistributing of orifice plate 4, enter a plurality of flat heat exchange pipe 6 of another flow process that is connected with upper cavity A, and along the lower end header from coupled outlet 9b outflow heat exchanger.Because shunting has the tap hole 5 that a plurality of areas do not wait on the orifice plate 4, the design principle of tap hole 5 is excellent Figure 8 shows that: because of the less refrigerant entrance point of the too high and former dispense flow rate of flow velocity, via area is big slightly; Less in local via area nearer from the refrigerant entrance point, that feed liquor is many originally, strengthen throttling; And it is relatively large in local via area far away from the refrigerant arrival end, that the script feed liquor is less.After reasonably designing, it is comparatively even to make that the gas-liquid two-phase cold-producing medium that enters each flat heat exchange pipe distributes, thereby improves the heat exchange efficiency of evaporimeter.
As shown in figure 17, it has illustrated header to be applied to the embodiment two of heat exchanger.In the present embodiment, when the heat exchanger with this header uses as condenser, when dotted line and solid line are represented condensation respectively and the flow of refrigerant direction during evaporation.The upper/lower terminal of flat heat exchange pipe 6 is connected with header respectively, and all contains shunting orifice plate 4 in this header.Gaseous coolant is entered the lower chamber B of header by inlet tube 9a, a plurality of tap holes 5 on shunting orifice plate 4, flow into a plurality of flat heat exchange pipe and the air side that are connected with upper cavity A downwards and carry out the condensation heat release, arrive in the header of the other end, become the gas-liquid two-phase refrigerant or still be overheated gas, entering another section via the through hole of offering on the blocking cap 7 71 has in the header of shunting orifice plate 4, so each flow process of heat exchanger all has header of the present utility model, therefore no matter how the interior refrigerant state of heat exchanger changes, all can utilize the shunting action of shunting orifice plate 4 to reach the purpose of uniform distribution cold-producing medium in each flat heat exchange pipe 6, thereby improve the whole heat exchange property of heat exchanger.
Only be specific embodiment of the utility model below, do not limit protection domain of the present utility model with this; Any replacement and the improvement done on the basis of not violating the utility model design all belong to protection domain of the present utility model.
Claims (10)
1. header, comprise the afflux tube wall, this afflux tube wall is provided with a plurality of connecting holes that are used to connect flat heat exchange pipe, it is characterized in that, be provided with the shunting orifice plate that is used to shunt and this header is divided into upper and lower two cavitys in this header, this shunting orifice plate is provided with one or more tap holes.
2. header as claimed in claim 1, it is characterized in that, this afflux tube wall is divided into: go up afflux tube wall and lower header tube wall, this shunting orifice plate is interspersed between afflux tube wall this on, the lower header tube wall, and with this on afflux tube wall, lower header tube wall center on formation upper cavity and lower chamber.
3. header as claimed in claim 1 is characterized in that this header also comprises the blocking cap that is used to seal this afflux tube wall, and this blocking cap is provided with through hole, and the end of this shunting orifice plate is provided with fixed part, and this through hole cooperates with this fixed part fixes this shunting orifice plate.
4. header as claimed in claim 1 is characterized in that this header also includes positioner, and it is used to limit the insertion depth of this flat heat exchange pipe, and it laterally is located at this shunting orifice plate upside, the end of going up the afflux tube wall or the end of lower header tube wall.
5. header as claimed in claim 1 is characterized in that, afflux tube wall or this lower header tube wall are provided with the connecting holes that many rows are used to connect flat heat exchange pipe on this, and these many row's flat heat exchange pipe are parallel or be the angle setting mutually.
6. header as claimed in claim 5 is characterized in that, is provided with dividing plate in this upper cavity or this lower chamber, makes this upper cavity or this lower chamber be divided into left and right two parts, and these left and right two parts form left chamber and right chamber.
7. header as claimed in claim 1 is characterized in that, the tap hole on this shunting orifice plate be shaped as circle, ellipse, rectangle or its both combination arbitrarily, and the area of a plurality of tap holes is unequal.
8. header as claimed in claim 1 is characterized in that, side of afflux tube wall, lower header tube wall connects on this, and opposite side forms a long and narrow vertical masonry joint.
9. header as claimed in claim 1 is characterized in that, cross section of afflux tube wall, lower header tube wall is respectively arc, rectangle or its both combination arbitrarily on this.
10. heat exchanger, it includes flat heat exchange pipe, header, the upper and lower end of this flat heat exchange pipe inserts the connecting hole of this header respectively, inlet tube, outlet is characterized in that, this header is as each described header of claim 1 to 9, and partly or entirely contains the shunting orifice plate in this header.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205173146U CN201876184U (en) | 2010-09-01 | 2010-09-01 | Collecting pipe and heat exchanger with same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010205173146U CN201876184U (en) | 2010-09-01 | 2010-09-01 | Collecting pipe and heat exchanger with same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201876184U true CN201876184U (en) | 2011-06-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010205173146U Expired - Lifetime CN201876184U (en) | 2010-09-01 | 2010-09-01 | Collecting pipe and heat exchanger with same |
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| CN (1) | CN201876184U (en) |
Cited By (22)
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| CN102230694A (en) * | 2011-06-28 | 2011-11-02 | 广东美的电器股份有限公司 | Parallel flow heat exchanger capable of improving flow uniformity of heat exchange working media |
| CN102230696A (en) * | 2011-06-28 | 2011-11-02 | 广东美的电器股份有限公司 | Parallel flow heat exchanger |
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| CN102384692A (en) * | 2010-09-01 | 2012-03-21 | 珠海格力电器股份有限公司 | Collecting pipe and heat exchanger with same |
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| CN102384692A (en) * | 2010-09-01 | 2012-03-21 | 珠海格力电器股份有限公司 | Collecting pipe and heat exchanger with same |
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