CN106322846A - Micro-channel heat exchanger - Google Patents
Micro-channel heat exchanger Download PDFInfo
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- CN106322846A CN106322846A CN201510384744.2A CN201510384744A CN106322846A CN 106322846 A CN106322846 A CN 106322846A CN 201510384744 A CN201510384744 A CN 201510384744A CN 106322846 A CN106322846 A CN 106322846A
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Abstract
A micro-channel heat exchanger comprises at least one layer of structure, namely, a first layer. Each first layer comprises a first collecting pipe, a second collecting pipe, multiple flat pipes arranged between the first collecting pipe and the second collecting pipe, and fins arranged between the adjacent flat pipes. The middle portion of the micro-channel heat exchanger comprises a roughly-closed or non-closed hole part. The hole part is not provided with the flat pipes or the fins. Each flat pipe comprises two opposite surfaces large in area. Each flat pipe comprises at least one nonlinear section. In the bending direction of each nonlinear section, the nonlinear section is bent towards one corresponding surface. At least two cavities, namely, the first cavity and the second cavity which are isolated from each other are formed in the first collecting pipe of each first layer. The heat exchanger has the beneficial effects that when the micro-channel heat exchanger is used in cooperation with an axial flow fan, space is reserved in the middle portion, the micro-channel heat exchanger corresponds to a base of the fan, the dead zone of a wind field is avoided, the heat exchange area of the heat exchanger can be well utilized, and the micro-channel heat exchanger is suitable for application and popularization.
Description
Technical field
The present invention relates to technical field of heat exchange, be specifically related to a kind of micro-channel heat exchanger.
Background technology
Micro-channel heat exchanger has obtained applying widely at refrigerating field.Micro-channel heat exchanger mainly includes
Header, flat tube and fin, wherein header flows into each flat tube for being guided by heat transferring medium, flat
Pipe is mainly used in circulation and the heat exchange of heat transferring medium, and fin is connected by welding and flat tube, passes through gas
Flowing realizes the heat exchange function of the heat transferring medium in flat tube.
Summary of the invention
Micro-channel heat exchanger blower fan to be coordinated drives air current flow to carry out heat exchange, gas
Flowing mainly driven by axial fan, blower fan drive gas pass through from the gas side of micro-channel heat exchanger,
Please join shown in Fig. 1, blower fan 10 is oppositely arranged with heat exchanger, and Fig. 2 is Simulation of Wind Field figure during operating,
It can be seen that there is the blind area of wind field, the centre of heat exchanger in heat exchanger section corresponding to blower fan pedestal
Part, the wind speed of i.e. corresponding blower fan base part is less, and the heat exchange area of heat exchanger can not be effectively sharp
With.
The present invention, precisely in order to solve the problems referred to above and propose, its object is to, it is provided that a kind of annular
Heat exchanger.
For achieving the above object, the present invention adopts the following technical scheme that
A kind of micro-channel heat exchanger, including:
A kind of micro-channel heat exchanger, including: at least one of which structure, i.e. ground floor, every ground floor all wraps
Include the first header, the second header, the multiple flat tubes being located between the first and second headers and set
Fin between adjacent flat tube；The middle part of described micro-channel heat exchanger includes that one is substantially closed or non-
Blind bore portion, described hole portion is not provided with flat tube and fin；It is bigger that each described flat tube has area
Two relative load-bearing surfaces, described flat tube includes at least one non-straight line segment, the bending of this non-straight line segment
Direction is towards one of them load-bearing surface one lateral buckling described；Described fin both sides have relative peak
Portion, described fin is respectively arranged between adjacent described flat tube, and fin extends in the same direction with flat tube, described wing
Two load-bearing surfaces that two peak portions of sheet are relative with adjacent flat tube respectively are connected；Each flat tube be respectively provided with to
A few inner passage, described inner passage extends along the length direction of described flat tube；Every ground floor
There is in described first header the cavity that at least two is isolated mutually, the i.e. first chamber and the second chamber, institute
State the first chamber relative to the second chamber from heat exchanger center closer to, in the chamber of described first header at least one
The first chamber, chamber has for external first interface；Have in described second header of every ground floor to
A few cavity, the i.e. the 3rd chamber；The flat tube of every ground floor at least includes two groups, the i.e. first pipe group and the
Two pipe groups, described first chamber of connection, one end of the first pipe group, described 3rd chamber of other end connection, second
One end of pipe group connects described 3rd chamber, and the other end connects described second chamber；The number of plies of described heat exchanger
Can be the one in following two situation with the position of the second interface:
One, the number of plies of heat exchanger is one layer, and the second interface is arranged at removing of described first header and arranges
Other chambeies outside first chamber interface or be arranged on the second header and be provided with the second interface；
Two, the number of plies of heat exchanger is at least two-layer, described first header except arrange first interface it
Other outer chambeies or the second header are provided with the interface that the header with other layers is connected, and second connects
Mouth is arranged on first header of other layers in addition to ground floor and is provided with the second interface.
Described in every ground floor, the flat tube quantity of the first pipe group is less than or equal to the flat tube quantity of other each pipe groups.
Described flat tube includes that flat segments and the main part at two ends, described non-straight line segment are arranged on described main body
Portion, described non-straight line segment is bending section or segmental arc, two carrying tables of the adjacent described flat tube of main part
Described fin it is provided with between face；Two flat tubes that the peak portion at the two ends of same fin connects, along described
Spacing between its main part of the diverse location of length direction is roughly equal
Described header is provided with the perforate for grafting flat tube, at least of described flat tube flat segments
Divide and insert connection in described perforate；Flat segments length s of described flat tube either end >=(1/3～1/2) d+3,
Wherein d is header external diameter, and unit is millimeter；It is deep that described flat tube flat segments insertion open interior is divided
Degree h≤(1/3～1/2) d, and h ＞ t, wherein t is header wall thickness.
The substantially ring-like structure of described micro-channel heat exchanger or include circulus, described header is with flat
The setting substantially vertical with the axis of described header of the hole of the cooperation of pipe.
From described micro-channel heat exchanger center outwards, total flow area of the inner passage of described flat tube by
Step increases, and is located relatively at total flow area of inner passage of the flat tube of outside more than or equal to being located relatively at
Total flow area of the inner passage of internal flat tube.
The density of different described fins, i.e. fin peak number in unit length, from the center of heat exchanger
Become larger to the periphery.
The inner side being positioned at described heat exchanger inner side flat tube is provided with the side plate of extension parallel with it and is located at
Therebetween fin；The outside being positioned at described heat exchanger outermost flat tube is provided with extension parallel with it
Outer side plate and be located at fin therebetween；The described integrally formed circular inside diameters of interior side plate is more than afflux
The twice of pipe external diameter；The radial distance of described inside and outside side plate and the same length of header.
The flow area of different flat tubes is roughly the same with its length ratio.
The density of different described fins, i.e. fin peak number in unit length, from the center of heat exchanger
Become larger to the periphery.
Described second header of described ground floor has a cavity that at least two is isolated mutually, and the i.e. the 3rd
Chamber and the 4th chamber, described 3rd chamber relative to the 4th chamber from heat exchanger center closer to；The flat tube of ground floor is extremely
Include three groups less, the i.e. first pipe group, the second pipe group and the 3rd pipe group, one end connection institute of the first pipe group
Stating the first chamber, the other end connects described 3rd chamber, and one end of the second pipe group connects described 3rd chamber, separately
One end connects described second chamber, and one end of the 3rd pipe group connects described second chamber, and other end connection is described
4th chamber；Second pipe group is between described first pipe group and the 3rd pipe group；Described first chamber and described
In 4th chamber, at least one of which has for external first interface
The annular of present invention heat exchanger or circulus design, with axial fan with the use of time,
Middle part slot milling setting corresponding with the pedestal of blower fan, avoids the blind area of wind field, changing of heat exchanger
Hot side is long-pending can be good at being utilized, and saves the material of heat exchanger, and header also can be relatively simultaneously
Short, save material further, reduce cost.
Accompanying drawing explanation
Illustrating with micro-channel heat exchanger for example below, accompanying drawing has only been by signal, and can not
Regard as the restriction to inventive embodiments.
Fig. 1 is Rectangular Microchannel heat exchanger known today to be set with axial fan in systems relative
Put schematic diagram.
Fig. 2 is the axial fan Simulation of Wind Field schematic diagram at Rectangular Microchannel heat exchanger surface.
Fig. 3 is the structural representation of a kind of embodiment of micro-channel heat exchanger.
Fig. 4 is the structural representation of the first header of micro-channel heat exchanger shown in Fig. 3.
Fig. 5 is the structural representation of the second header of micro-channel heat exchanger shown in Fig. 3.
Fig. 6 is the structural representation of the flat tube of micro-channel heat exchanger shown in Fig. 3.
Fig. 7 is the schematic front view of micro-channel heat exchanger shown in Fig. 3.
Fig. 8 is three kinds of designs that flat tube inner passage flow area is incremented by.
Fig. 9 is a kind of annular micro-passage heat exchange device, and its fin density is incremented by from inside to outside.
Figure 10 is a kind of structural representation of monolayer two flow process micro-channel heat exchanger, omits fin in figure.
Figure 11 is a kind of structural representation of monolayer three flow process micro-channel heat exchanger, omits fin in figure.
Figure 12 is a kind of structural representation of double-deck two flow process micro-channel heat exchangers.
Figure 13 is the rearview of Figure 12 micro-channel heat exchanger.
Figure 14 is the exploded perspective view of first and second header connection of micro-channel heat exchanger shown in Figure 12.
Figure 15 is the another kind of structural representation of double-deck two flow process micro-channel heat exchangers.
Detailed description of the invention
Below in conjunction with the accompanying drawings embodiments of the invention are specifically described, refer to Fig. 3-Figure 15.
As it is shown on figure 3, micro-channel heat exchanger includes first header the 20, second header 30, some
Flat tube 40, some fins 50, the central region of micro-channel heat exchanger is not provided with flat tube and fin, and
Form the hole portion 63 of substantially closed loop or a non-closed loop.The first afflux is inserted at the two ends of flat tube 40 respectively
Hole that pipe 20 is corresponding with the second header 30 by welding and first header the 20, second header
30 fix, and the first header 20 and the second header 30 are parallel and adjacent to setting, the two of flat tube 40
End is respectively communicated with the first header 20 and the second header 30, and fin 50 is arranged at adjacent flat tube 40
Between, additionally heat exchanger is additionally provided with the side plate 61,62 being positioned at inside and outside both sides, between flat tube and side plate also
It is provided with fin.
As shown in Figure 4, the first header 20 includes the first header body 21 and the first of two ends
End cap the 22, first stub (tube) the 23, first adapter the 24, second stub (tube) the 33, second adapter 34, the
One adapter 24 is connected fixing by the first stub (tube) 23 with the first header body 21, the first adapter
The first interface that the interface at 24 places is connected with system as heat exchanger, the second adapter 34 is by second
Stub (tube) 33 is connected fixing with the second header body 31, and the interface at the second adapter 34 place is as changing
The second interface that hot device is connected with system.First header body 21 is hollow structure, along the first afflux
The axially arranged hole 211 having multiple end for flat tube 40 to insert of pipe body 21, one end of flat tube 40
Stretching into hole 211 and by being welded and fixed, the first header 20 two ends are respectively fixedly connected with the first end cap
22, form the cavity of relative closure in making the first header 20, arrange at the first header body 21a
Septalium, dividing plate 100 is had to insert septalium and by being welded and fixed, by the setting of dividing plate 100,
The inner chamber of the first header 20a is divided into the cavity of two mutual isolations, the i.e. first manifold 25 and
Two manifolds 26, first adapter the 33, second adapter 34 respectively with described first manifold 25 and second
Manifold 26 connects.
As it is shown in figure 5, the second header 30 includes the second header body 31 and the second of two ends
End cap 32.Second header body 31 is also hollow structure, is provided above with multiple confession flat tube 40
The hole 311 that end is inserted, the other end of flat tube 40 stretches into hole 311 and by being welded and fixed, the second collection
The two ends of flow tube body 31 are respectively fixedly connected with the second end cap 32, form phase in making the second header 30
To the cavity closed.
Flat tube 40 is the flat structure of longitudinal extension before forming, and it has bigger two relative of area
Load-bearing surface, the most curved extension of described flat tube, the overbending direction of this arc be towards described wherein
One load-bearing surface one lateral buckling, flat tube 40 includes the flat segments 42 at two ends and ring-type master after shaping
Body section 41, ring-type main paragraph 41 includes the side that inner ring surface 411, outer ring surface 411 ', area are less
Surface 412, has inner passage in flat tube 40, inner passage extends along the length direction of flat tube 40,
Flat tube 40 two ends are respectively a flat segments 42, and the first header 20 is inserted in the end of flat segments 42
With the second header 30 thus connect the first header 20 and the second header 30.
The multiple holes 211 arranged on first header body 21 sidewall are along the first header body 21
Axially arrangement.The multiple holes 311 arranged on second header body 31 sidewall are along the second header body
The axial arrangement of 31.These the most ring-type settings of flat tube 40, the most mutual between flat tube 40
Parallel, so, when the first header 20 is side-by-side with the second header 30, and sidewall substantially pastes
When closing or press close to, a plurality of flat tube 40 and first side-by-side header the 20, second header 30
Collectively form a substantially complete annular breadth.
Due to perforate on tube wall, radial hole is more more convenient than oblique hole machined, low cost, therefore the first collection
Hole on flow tube body 21 and the second header body 31 sidewall is all opened in radially, parallel between hole
Arrange.Flat tube 40 includes main paragraph 41 and is positioned at the flat segments 42 at main paragraph two ends, as shown in Figure 6,
The curved extension of main paragraph 41, the linear extension of flat segments 42, the flat segments 42 at two ends is at least
A part is inserted in the hole of the first header body 21 and the second header body 31 respectively, flat segments
42 is substantially vertical with header body central axle, even if when assembling flat tube, straight cutting is than oblique cutting the most more
Fast and easy.
As it is shown in fig. 7, be provided with fin between adjacent flat tube 40, specifically, it is positioned at opposite exterior lateral sides
The main part 41b of inner ring surface 411 and adjacent flat tube on its inside of main part 41a of flat tube
Outer ring surface 411 ' between be provided with fin 50, the main body of fin is roughly triangular or waveform, this
Group fin near the top ends peak portion in other words of the inner ring surface 411 of the main part 41a of the flat tube in outside it
Between the meansigma methods of spacing L2 more than it near the outer ring surface 411 ' of the main part 41b of the flat tube of inner side
End or the meansigma methods of spacing L1 of between peaks.Assuming that header external diameter is d, wall thickness is t,
The longitudinal length of the flat segments 42 of flat tube 40 either end is s, then s >=(1/3～1/2) d；Assume flat
It is h that pipe flat segments 42 inserts the degree of depth that open interior divides, then t ＜ h≤(1/3～1/2) d.
The main paragraph 41 of flat tube 40 is C-shaped, and the first header 20 is the biggest with the second header 30
Cause fits together, and constitutes substantially annular heat exchanger.
There is in flat tube 40 multiple inner passage, owing to the length of different flat tube 40 inner passages is different,
Being incremented by from the outside passage length in heat exchanger center, when channel sized flow is identical, its flow resistance is also with length
Change and different, i.e. incremental from the outside flow resistance in heat exchanger center.In order to ensure each portion of micro-channel heat exchanger
Point heat exchange property generally uniform, make the refrigerant amount of the variant flat tube of entrance 40 substantially with its heat-transfer surface
Long-pending coupling, the flow area of the inner passage of each flat tube can also be designed to difference, specifically, from
Heat exchanger center is outside, and the flow area of flat tube 40 is incremented by.As made the flow area of different flat tube and being somebody's turn to do
The length of flat tube is directly proportional, as made flow area and its length l of the flat tube 400 ' of outside relatively '
Ratio substantially identical with the ratio of its length l with the flow area of the flat tube 400 of relative interior, so change
Hot device overall heat exchange is uniform, and efficiency is preferable.
The incremental manner of the flow area of flat tube 40 can be gradual change type step by step, such as 1,2,3,4 ...；
Can also bypass the immediate leadership gradual change type, such as 1,1,2,2,3,3 ..., numeral simply signal here is passed
The mode increased, does not limit concrete ratio.Here flow area refers to a plurality of of same flat tube 40
The flow area that inner passage is total.Therefore, it can keep every inner passage 401 of different flat tube 40
Flow area constant in the case of, be gradually increased the quantity of flat tube 40 ' inner passage 401 ', as figure
Shown in 8a；Inner passage 401 quantity that can also keep different flat tube 40 is constant, is gradually increased flat
Pipe 40 " every inner passage 401 " flow area, as shown in Figure 8 b；It is of course also possible to be it
His form, as shown in Figure 8 c, the flat tube 40 of relative inner has multiple inner passage 401, but relatively
The flat tube 40 in outside " ' inner passage 401 " ' negligible amounts but relatively want big, and make its total circulation
Area is greater than the flat tube of relative inner.
The plurality of inner passage is transversely arranged in order flat tube 40, laterally big at flat tube 40
Cause is uniformly distributed, and enables fluid to pass in and out each inner passage equably, to reach optimal heat exchange effect
Really.
Fin 50 generally longitudinal extension, its both sides have relative peak portion, and fin 50 is respectively arranged on
Between the inside and outside anchor ring that the main paragraph area of adjacent described flat tube is bigger, fin extends in the same direction with flat tube,
Two load-bearing surfaces that two peak portions of fin are relative with adjacent flat tube respectively are welded and fixed.
The present embodiment fin uses corrugated fin 50, and fin has elasticity, and deformable can
Plasticity is good, can carry out stretching extension according to the degree of crook of flat tube, to be suitable between adjacent flat tube
Installing space, the crest of these fin both sides is i.e. peak portion described above.By adjusting the close of fin 50
Degree can also improve heat transfer effect, specifically, in view of wind speed is outwards incremented by from heat exchanger center, and can
With from heat exchanger from inside to outside, increase the density of fin 50.Generally, the fin in unit length is used
Crest number weigh its density.It can be clearly seen that the fin density of this heat exchanger from Fig. 9 example
It is gradually increased from inside to outside.
Certainly, the incremental manner of the density of fin 50 can be gradual change type step by step, such as 1,2,3,
4……；Can also bypass the immediate leadership gradual change type, such as 1,1,2,2,3,3 ..., numeral is only here
It is the mode illustrating to be incremented by, does not limit concrete ratio.
Be additionally provided with interior side plate 61 in the inner side of micro-channel heat exchanger inner side flat tube 40, interior side plate 61 with
Inner side flat tube 40 generally remains and extends in parallel, and fin 50 is provided therebetween, and interior side plate 61 is also
Can be selected for flat tube, simply its two ends do not connect with header.Outside at heat exchanger outermost flat tube 40
Being additionally provided with outer side plate 62, outer side plate 62 generally remains with outermost flat tube 40 and extends in parallel, the two it
Between be provided with fin 50, outer side plate 62 also can be selected for flat tube, and its two ends do not connect with header.As
Shown in Fig. 7, it is assumed that the internal diameter substantially d in interior side plate 61 integrally formed looping pit portion 630, then d0
＞ 2d (i.e. the twice of header external diameter).In assuming, side plate 61, the radial distance of outer side plate 62 are r,
The a length of m of header, then r with m is roughly the same, so that heat exchanger entirety is more attractive in appearance, and makes
Header lengths is shorter, saves material, reduces cost.
As shown in Figure 10, by the setting of dividing plate 100, flat tube 40 is divided into two groups, the i.e. first pipe
Group 40a and the second pipe group 40b, one end of the first pipe group 40a connects with the first manifold 25, another
End then inserts the inner space of Kong Eryu second header of the second header body 31a；Second pipe group
One end of 40b connects with the second manifold 26, the other end insert the hole of the second header body 31a with
The inner space of the second header.So, this micro-channel heat exchanger has two flow processs, cold-producing medium from
First adapter enters into the first manifold 25, then by the first pipe group 40a to the second header 30a's
Cavity, this is first flow process；The cavity of the second header 30a is connection, and cold-producing medium is from second
Header 30a enters back into the second pipe group 40b, flows to the second manifold 26, finally from the second adapter stream
Going out, this is second flow process.The flat tube number of the first pipe group 40a and the second pipe group 40b could be arranged to
Identical, it is also possible to be arranged to difference.Owing to the while that inner side flat tube being comparatively short, wind speed is relatively low, heat exchange
Coefficient relatively low gaseous refrigerant heat exchange is concentrated mainly in the flat tube of inner side, and middle part and outside wind speed are bigger,
So, in the case of the relatively close inner side of first pass is arranged, arranging at flat tube number, can be excellent
Turning to the flat tube number flat tube number less than the second pipe group 40b of the first pipe group 40a, the proportioning in figure is simply
Example, it can be a pipe group according to optimizations such as heat exchange area, wind speed, cold-producing medium coefficients
Proportioning rather than stick to diagram.Such flow setting can make the flow process of heat exchanger more optimize,
The heat exchange area of micro-channel heat exchanger obtains more Appropriate application, and performance is further enhanced.Wherein
The cavity of two header 30a is used as coupling chamber.It addition, two flow processs can be according to system needs
Adjust, make the relatively close outside of first pass, and make the relatively close inner side of second procedure, make in other words
Cold-producing medium flow direction and the reverse flow shown in Figure 10.
From introducing before it can be seen that except for the first manifold of external interface and the second manifold
Outside, remaining chamber can be used as coupling chamber and distribution cavity, couple chamber both can with the first manifold
Second manifold is positioned on same header, it is also possible to be not positioned on same header.
Heat exchanger more than monolayer three flow process can refer to above description, except that, the dividing plate of setting
Number is different, and flat tube packet count is different, and the group number of flat tube is identical with flow process number.Dividing plate symbol is set
Close such rule: the dividing plate number in two headers is equal or differs one, i.e. when altogether arranging even number
During individual dividing plate, the dividing plate number in two headers is equal, and now the first adapter and the second adapter are respectively provided with
On two headers；Dividing plate number difference one when altogether arranging odd number dividing plate, in two headers
Individual, now the first adapter and the second adapter are arranged on the header that dividing plate quantity is many, from different
Cavity connects.When the dividing plate number altogether arranged is n, the flow process number of this heat exchanger is n+1, flat tube
It is divided into n+1 group.The flat tube number of first pass can be less than or equal to the flat tube number of other flow processs, other streams
The flat tube number of journey can be equal or different.Therefore the flat tube number proportioning mode of each flow process can be 1,2,
2 ..., it is also possible to be 1,2,1 ..., it is also possible to be 1,2,3 ..., numeral is simply here
The mode that signal is incremented by, does not limit concrete ratio.Figure 11 gives monolayer three flow heat exchanger
Schematic diagram, figure eliminates fin.First header 20b, the second header 30b are both provided with
Dividing plate 100, cold-producing medium enters into the first manifold 201 from the first adapter, then by the first pipe group 40a
To the 3rd manifold 301 of the second header 30b, this is first flow process；From the second header 30b
The 3rd manifold 301 second pipe group 40b through connecting with the 3rd manifold 301, flow to the second collection
Stream chamber 202, this is second flow process, then from second manifold 202 of the first header 20b through with
3rd pipe group 40c of the second manifold 202 connection, flows to the 4th manifold of the second header 30b
302, this is the 3rd flow process, then flows out from the second adapter.
The structure of double-deck multipaths and every layer of two flow process can refer to monolayer two flowage structure presented hereinbefore,
As shown in Figure 12 and Figure 13, arrow signal refrigerant flow direction in figure, the numeral on arrow is secondary for flowing to
Sequence, the set-up mode on upper strata is similar with the type of flow of two flow processs presented hereinbefore, and cold-producing medium is from first
Adapter 23 enters first manifold of the first header 20c, then by connect with the first manifold the
The cavity of one pipe group 40a to the 3rd header 90a, this is first flow process；3rd header 90a
Cavity be connection, cold-producing medium enters back into the second pipe group 40b from the 3rd header 90a, flows to the
3rd manifold of one header 20c, this is second flow process；Then by adapter 92a from the 3rd
Manifold flows to the 4th manifold of the second header 30c, by connect with the 4th manifold the 3rd
Pipe group 40c flows to the inner chamber of the 4th header 91a from the 4th manifold, and this is the 3rd flow process；4th
The cavity of header 91a is connection, and cold-producing medium enters back into the 4th pipe group from the 4th header 91a
40d, flows to second manifold of the second header 20c through the 4th pipe group 40d, and this is the 4th flow process；
Flowed out by the second adapter 34 connected with 40 again；Here between the first header and the second header
Connector only connects the 3rd manifold and the 4th manifold, logical between the 3rd manifold and the 4th manifold
Crossing connector 92a connection, its concrete structure joins Figure 14, the first header body 21 on upper strata with under
The sidewall that first header body 21 of layer is relative is provided with corresponding hole 211,311, hole 211
Connecting with the 3rd manifold, hole 311 connects with the 4th manifold, meanwhile, corresponding on connector 92a
Position also is provided with hole 921a, and third and fourth header is fixed with connector 92a three and is connected and the position in hole
Putting correspondence, the i.e. the 3rd manifold and the 4th manifold are connected by connector 92a.Connector 92a's
Hole is not limited to shown in legend, can be that circular, square, triangle etc. is variously-shaped.Multipaths
Multi-layer exchanging heat device, its set-up mode is as follows: all flat tubes of ground floor covered by cold-producing medium, then pass through
The mode of communicating of header-connector-header enters next layer of header, until covering all layers.
And the set-up mode of each layer is roughly the same with the set-up mode of monolayer, all use dividing plate separation chamber
Mode designs multipaths structure.Can also first pass be additionally the part flat tube of ground floor, the most again
Enter the second layer by connector and carry out second procedure and the 3rd flow process or more multipaths, pass through the most again
Connector returns to ground floor and carries out follow-up flow process again, specifically can arrange by coupled system.
Add man-hour, all parts of micro-channel heat exchanger are ready to, and corresponding flat tube is processed into
Corresponding required different length, and the flat tube of different length is bent into there is flat segments and main paragraph
Structure, is then respectively charged into flat tube hole corresponding to header 211, is completed by remaining parts,
And by between adjacent flat tube, between flat tube and the interior side plate of inner side, outermost flat tube and outer side plate
Between load the different fin of length, and carry out assembling fixing, be then welded and fixed by stove.
Heat exchanger except be concentric annular can also is that other circuluses such as flat tube be by multiple arcs with
Rectilinear combination, if flat tube is the heat exchanger substantially combined in polygonized structure, Figure 15
Showing the polygon micro-channel heat exchanger of bilayer two flow process, wherein flat tube includes the straight of two ends
Section 42, main part 41a, main part 41a include multiple to form generally polygonal straight section 413
And for multiple segmental arcs 414 of transition, two phases arranged from inside to outside between adjacent straight section 413
Between adjacent flat tube roughly equal in the spacing of diverse location, between adjacent flat tube straight section 413
Spacing between spacing with adjacent segmental arc 414 is equal, and between adjacent flat tube straight section and adjacent
Fin 50 it is provided with between flat tube segmental arc.Polygon mentioned here include but not limited to triangle,
Tetragon, pentagon, hexagon etc., remaining structure and assembling mode can refer to above, the most no longer
Describe in detail.
Mentioning in this specification and be provided with fin between adjacent flat tube, " adjacent flat tube " refers to here
Along the flat tube between the adjacent position of heat exchanger radial direction between same layer.
It should be understood that above example be merely to illustrate the present invention and and the unrestricted present invention retouched
The technical scheme stated, such as to "front", "rear", "left", "right", " on ", D score isotropy
Define, although this specification has been described in detail with reference to the above embodiments, but, ability
Territory it is to be appreciated by one skilled in the art that person of ordinary skill in the field still can be to above-mentioned reality
Execute example to carry out being mutually combined, revising or equivalent, and all are without departing from the spirit of the present invention and model
The technical scheme enclosed and improvement thereof, all should contain in scope of the presently claimed invention.
Claims (11)
1. a micro-channel heat exchanger, including: at least one of which structure, i.e. ground floor, ground floor includes the first header, the second header, the multiple flat tubes being located between the first and second headers and is located at the fin between adjacent flat tube；The middle part of described micro-channel heat exchanger includes that one is substantially closed or nonocclusive hole portion, and described hole portion is not provided with flat tube and fin；Each described flat tube has two apparent surfaces that area is bigger, and described flat tube includes at least one non-straight line segment, and the overbending direction of this non-straight line segment is towards one of them surface one lateral buckling described；Described fin both sides have relative peak portion, and described fin is respectively arranged between adjacent described flat tube, and fin extends in the same direction with flat tube, and two surfaces that two peak portions of described fin are relative with adjacent flat tube respectively are connected；Each flat tube is respectively provided with at least one inner passage, and described inner passage extends along the length direction of described flat tube；Described first header of ground floor has a cavity that at least two is isolated mutually, the i.e. first chamber and the second chamber, described first chamber relative to the second chamber from heat exchanger center closer to, in the chamber of described first header, at least a chamber has for external first interface；Described second header of ground floor has at least one cavity, the i.e. the 3rd chamber；The flat tube of ground floor at least includes two groups, the i.e. first pipe group and the second pipe group, and one end of the first pipe group connects described first chamber, and the other end connects described 3rd chamber, and one end of the second pipe group connects described 3rd chamber, and the other end connects described second chamber；The number of plies of described heat exchanger can be the one in following two situation with the position of the second interface:
One, the number of plies of heat exchanger is one layer, and other chambeies in addition to arranging first interface of described first header or the second header are provided with the second interface；
Two, the number of plies of heat exchanger is at least two-layer, other chambeies in addition to arranging first interface of described first header or the second header are provided with the interface that the header with other layers is connected, and first header of other layers in addition to ground floor is provided with the second interface.
2. micro-channel heat exchanger as claimed in claim 1, it is characterised in that: the flat tube quantity of the first pipe group described in ground floor is less than or equal to the flat tube quantity of other each pipe groups.
3. micro-channel heat exchanger as claimed in claim 1, it is characterized in that: described flat tube includes flat segments and the main part at two ends, described non-straight line segment is arranged on described main part, described non-straight line segment is bending section or segmental arc, is provided with described fin between two surfaces of the adjacent described flat tube of main part；Two flat tubes that the peak portion at the two ends of same fin connects, roughly equal along the spacing between its main part of diverse location of described length direction.
4. micro-channel heat exchanger as claimed in claim 2, it is characterised in that: described header is provided with the perforate for grafting flat tube, and at least some of of described flat tube flat segments inserts connection in described perforate；Flat segments length s of described flat tube either end >=(1/3～1/2) d+3, wherein d is header external diameter, and unit is millimeter；Described flat tube flat segments inserts degree of depth h≤(1/3～1/2) d that open interior is divided, and h ＞ t, and wherein t is header wall thickness.
5. micro-channel heat exchanger as claimed in claim 1, it is characterised in that: the substantially ring-like structure of described micro-channel heat exchanger or include circulus, the setting substantially vertical with the axis in the hole of the cooperation of flat tube Yu described header of described header.
6. the micro-channel heat exchanger as described in claim 1-5 is arbitrary, it is characterized in that: outside from described micro-channel heat exchanger center, total flow area of the inner passage of described flat tube is stepped up, and total flow area of the inner passage being located relatively at the flat tube of outside is more than or equal to the total flow area being located relatively at the inner passage of the flat tube of inside.
7. the micro-channel heat exchanger as described in claim 1-5 is arbitrary, it is characterised in that: the density of different described fins, i.e. the fin peak number in unit length, becomes larger to the periphery from the center of heat exchanger.
8. the micro-channel heat exchanger as described in claim 1-5 is arbitrary, it is characterised in that: the inner side being positioned at described heat exchanger inner side flat tube is provided with the side plate of extension parallel with it and is located at fin therebetween；The outside being positioned at described heat exchanger outermost flat tube is provided with the outer side plate of extension parallel with it and is located at fin therebetween；The described integrally formed circular inside diameters of interior side plate is more than the twice of header external diameter；The radial distance of described inside and outside side plate and the same length of header.
9. the micro-channel heat exchanger as described in claim 1-8 is arbitrary, it is characterised in that: the flow area of different flat tubes is roughly the same with its length ratio.
10. the micro-channel heat exchanger as described in claim 1-9 is arbitrary, it is characterised in that: the density of different described fins, i.e. the fin peak number in unit length, becomes larger to the periphery from the center of heat exchanger.
11. micro-channel heat exchangers as described in the claims are arbitrary, it is characterised in that: described second header of described ground floor has a cavity that at least two is isolated mutually, the i.e. the 3rd chamber and the 4th chamber, described 3rd chamber relative to the 4th chamber from heat exchanger center closer to；The flat tube of ground floor at least includes three groups, i.e. first pipe group, the second pipe group and the 3rd pipe group, one end of first pipe group connects described first chamber, the other end connects described 3rd chamber, one end of second pipe group connects described 3rd chamber, the other end connects described second chamber, and one end of the 3rd pipe group connects described second chamber, and the other end connects described 4th chamber；Second pipe group is between described first pipe group and the 3rd pipe group；In described first chamber and described 4th chamber, at least one of which has for external first interface.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510384744.2A CN106322846A (en) | 2015-06-30 | 2015-06-30 | Micro-channel heat exchanger |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510384744.2A CN106322846A (en) | 2015-06-30 | 2015-06-30 | Micro-channel heat exchanger |
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| Publication Number | Publication Date |
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| CN106322846A true CN106322846A (en) | 2017-01-11 |
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| CN201510384744.2A Pending CN106322846A (en) | 2015-06-30 | 2015-06-30 | Micro-channel heat exchanger |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115235149A (en) * | 2022-06-22 | 2022-10-25 | 西安交通大学 | Disc type micro-channel heat regenerator for low-temperature refrigerator or freezer and working method |
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Effective date of registration: 20191107 Address after: 310018 289-1, No.12 Baiyang street, Hangzhou Economic and Technological Development Zone, Zhejiang Province Applicant after: Sanhua Micro Channel Heat Exchanger Inc. Address before: 310018, Zhejiang, Hangzhou economic and Technological Development Zone, No. 12 Poplar Street, 289-3 street, No. Applicant before: HANGZHOU SANHUAJIA ELECTROTHERMAL MANAGEMENT SYSTEM CO., LTD. |
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Application publication date: 20170111 |