CN107461966A - Heat pump unit, micro-channel heat exchanger and manufacturing method thereof - Google Patents
Heat pump unit, micro-channel heat exchanger and manufacturing method thereof Download PDFInfo
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- CN107461966A CN107461966A CN201710606757.9A CN201710606757A CN107461966A CN 107461966 A CN107461966 A CN 107461966A CN 201710606757 A CN201710606757 A CN 201710606757A CN 107461966 A CN107461966 A CN 107461966A
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- 238000004519 manufacturing process Methods 0.000 title claims abstract description 5
- 238000012545 processing Methods 0.000 claims abstract description 9
- 238000002360 preparation method Methods 0.000 claims abstract description 7
- 238000005452 bending Methods 0.000 claims description 8
- 238000003466 welding Methods 0.000 claims description 5
- 238000005476 soldering Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 5
- 238000000034 method Methods 0.000 description 5
- 238000010276 construction Methods 0.000 description 3
- 238000007493 shaping process Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007717 exclusion Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 238000003908 quality control method Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B30/00—Heat pumps
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The invention relates to the technical field of heat exchange, in particular to a microchannel heat exchanger which comprises a heat exchanger body with the overall outer diameter changing along the axial direction, wherein the heat exchanger body comprises a plurality of flat pipes which are parallel to each other and spaced, and fins arranged among the flat pipes. This microchannel heat exchanger, the radial area of heat exchanger body changes along the axial, therefore has formed roughly conical inclined plane for the fin border is collected more easily to heat exchanger surface adnexed water, breaks away from the heat exchanger along with the air flow, can flow down along the conical inclined plane simultaneously, thereby makes the heat transfer performance that the drainage is effectively improved more easily, and this heat exchanger body includes a plurality of flat pipes that parallel interval set up to and the fin between the flat pipe, simple structure, easily processing preparation. The invention also relates to a heat pump unit and a manufacturing method of the micro-channel heat exchanger.
Description
Technical field
The present invention relates to technical field of heat exchange, more particularly to a kind of source pump, micro-channel heat exchanger and its making
Method.
Background technology
Conventional microchannel heat exchanger, because heat exchanger tube (flat tube) is horizontal positioned so that condensate is not easy to exclude, while easily product
Ash, heat exchanger heat exchange property is influenceed, be unfavorable for promoting its application in source pump.
Therefore there is a kind of micro-channel parallel flow heat exchanger, be generally similar to finned tube exchanger.It uses full slice system
Fin structure, the groove for plugging flat tube is opened up on fin, and the wedge-shaped in cross-section of flat tube, flat tube are inserts horizontally into perpendicular
In the fin groove directly set, formed by welding.So, flat tube upper and lower surface has inclination angle with horizontal plane, and because fin is
It is vertically arranged, forms the drainage pattern similar to finned tube exchanger.But although the micro-channel parallel flow heat exchanger can expire
Sufficient draining and heat exchange, but the processing of fin, the processing of flat tube and flat tube and fin coordinate welding difficulty big, are unfavorable for batch
Change, quality control is difficult.
The content of the invention
Based on this, it is necessary to be not easy the processing and fabricating of exclusion or heat exchanger for traditional micro-channel heat exchanger condensate
The problems such as being not easy, there is provided a kind of condensate easily excludes, and heat exchange property is good and the micro-channel heat exchanger simple in construction easily made, simultaneously
Additionally provide it is a kind of include the source pump of the micro-channel heat exchanger, and provide a kind of making side of micro-channel heat exchanger
Method.
Above-mentioned purpose is achieved through the following technical solutions：
A kind of micro-channel heat exchanger, including：The axially varying heat exchanger body of entire outer diameter, heat exchanger body include phase
Some flat tubes of mutual parallel interval, and the fin being arranged between flat tube.
In one of the embodiments, flat tube have it is circumferential encloses four side walls set, respectively relative the first side wall and
Second sidewall, and the 3rd relative side wall and the 4th side wall, the fin between adjacent two flat tubes connect respectively one it is flat
4th side wall of pipe and the 3rd side wall of another flat tube.
In one of the embodiments, the 3rd side wall of each flat tube with respect to the 4th side wall in heat exchanger body
Mandrel line, and the 3rd side wall and the 4th side wall are in angle with the central axis of heat exchanger body.
In one of the embodiments, flat tube is in circular arc along length extension, and towards the central axis of heat exchanger body
Bending.
In one of the embodiments, flat tube includes multiple arc sections and multiple straightways, and each arc section is direction
The concave arc-shaped section of the central axis bending of heat exchanger body.
In one of the embodiments, heat exchanger body also includes the first header and the second header, multiple flat tubes
Both ends are connected with the first header and the second header respectively；The axis of first header inclines relative to the axis of the second header
Tiltedly.
In one of the embodiments, each flat tube includes the Part I being connected with the first header, and Part I hangs down
Directly in the first header；
Each flat tube also includes the Part II being connected with the second header, and Part II is perpendicular to the second header.
In one of the embodiments, on the first header along its it is axially arranged have multiple first slots, multiple flat tubes
One end is inserted into multiple first slots correspondingly；
On second header along its it is axially arranged have multiple second slots, the other end of multiple flat tubes inserts correspondingly
Into multiple second slots.
In one of the embodiments, multiple flat tubes are arranged with identical spacing.
A kind of source pump, including the as above micro-channel heat exchanger described in any one.
A kind of preparation method of micro-channel heat exchanger, comprises the following steps：
Processing obtains the different flat tube of multiple length, and the fin that multiple length are different；
Multiple flat tubes pre-fold curving arc-shaped by respective default radius bend respectively；
By multiple flat tubes, incremental direction is arranged in order along its length, and the length that multiple fins are corresponded to flat tube assembles successively
In the interval of two flat tubes；
The both ends of each flat tube are respectively inserted into pre-assembled in the slot of header obtain substantially in the plane of fan annular
Heat exchanger, the plane heat exchanger of fan annular is inserted welding fabrication is carried out in soldering oven；
The plane heat exchanger for fanning annular is subjected to bending by the bender that cone angle is α, changed with what formation was substantially conical
Hot device body.
In one of the embodiments, the angular range of cone angle is 0~90 °.
Above-mentioned micro-channel heat exchanger, the radial direction area of heat exchanger body is axially varying, thus forms and be substantially conical
Inclined-plane so that heat exchanger surface attachment water be easier to be pooled to fin edge, with air flow depart from heat exchanger, simultaneously
It can be flowed down along tapered slope, be easier draining, so as to effectively improve the heat exchange property of heat exchanger, and the heat exchanger body
The multiple flat tubes set including parallel interval, and the fin between flat tube, simple in construction, making easy to process.
Brief description of the drawings
Fig. 1 is the structural representation for the micro-channel heat exchanger that one embodiment of the invention provides；
Fig. 2 is Fig. 1 A-A sectional views；
Fig. 3 is Fig. 2 partial enlarged drawing；
Fig. 4 is the schematic top plan view for the micro-channel heat exchanger that one embodiment of the invention provides；
Fig. 5 is the expanded schematic diagram for the micro-channel heat exchanger that one embodiment of the invention provides；
Fig. 6 is the application schematic diagram for the micro-channel heat exchanger that one embodiment of the invention provides；
Fig. 7 is the schematic top plan view for the micro-channel heat exchanger that another embodiment of the present invention provides.
Wherein：
001- heat exchanger bodies；
100- flat tubes；
110- the first side walls；120- second sidewalls；The side walls of 130- the 3rd；The side walls of 140- the 4th；
200- fins；
The headers of 300- first；
The headers of 400- second.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, by the following examples, and combine attached
Figure, source pump, micro-channel heat exchanger to the present invention and preparation method thereof is further elaborated.It should be appreciated that this
The specific embodiment of place description is not intended to limit the present invention only to explain the present invention.
It should be noted that when element is referred to as " being fixed on " another element, it can be directly on another element
Or there may also be element placed in the middle.When an element is considered as " connection " another element, it can be directly connected to
To another element or it may be simultaneously present centering elements.On the contrary, when element be referred to as " directly existing " another element " on " when,
In the absence of intermediary element.Term as used herein " vertically ", " horizontal ", "left", "right" and similar statement are
For illustrative purposes.
The micro-channel heat exchanger provided referring to Fig. 1 to Fig. 3, one embodiment of the invention, including：Entire outer diameter is axially varying
Heat exchanger body 001, heat exchanger body 001 includes some flat tubes 100 at interval of being parallel to each other, and is arranged on flat tube 100
Between fin 200.
Wherein, flat tube 100 is the flat structure of Longitudinal extending, and the inside of flat tube 100 has multiple circulation passages, flat tube
100 are mainly used in the circulation and heat exchange of heat transferring medium.Multiple flat tubes 100 are parallel to each other interval setting, what multiple flat tubes 100 were spaced
Distance can be identical or different, and in the present embodiment, multiple flat tubes 100 are arranged with identical spacing.
Further, flat tube 100, which has, circumferentially encloses four side walls set, respectively relative the first side wall 110 and second
Side wall 120, and the 3rd relative side wall 130 and the 4th side wall 140, the fin 200 between adjacent two flat tubes 100 are distinguished
4th side wall 140 of one flat tube 100 of connection and the 3rd side wall 130 of another flat tube 100.
I.e. each flat tube 100 is by two end faces of longitudinal direction, and circumference between two end faces encloses four side walls set
Form, four side walls include less two side walls being oppositely arranged of area, respectively the first side wall 110 and second sidewall
120, and be oppositely arranged two side walls that area is larger, respectively the 3rd side wall 130 and the 4th side wall 140, then fin 200
The larger side wall of the area of adjacent flat tube 100 is connected, is so easy to the connection of fin 200 and flat tube 100 to be molded.
The main body of fin 200 can connect a flat tube respectively with triangular in shape or waveform, the both ends of same fin 200
100 the 4th side wall 140, and the 3rd side wall 130 of another flat tube 100, so, flat tube 100, fin 200 overlap successively
The main part for realizing heat exchange function of heat exchanger body 001 described in arrangement form.The surface of fin 200 can be opened a window, pressure
The processing such as bridge, folding line, can play and strengthen disturbance of the fluid by surface, promote the effect of heat exchange.
Referring to Fig. 1, the entire outer diameter of heat exchanger body 001 is axially varying, i.e., heat exchanger body 001 can by D1 ends to Di ends
Become larger, it follows that the length of flat tube 100 is gradually increased by D1 ends to Di ends, and a pitch of fins for fin 200 is by D1 ends
It can be become larger to Di ends, the distribution density of fin 200 can be gradually reduced by D1 ends to Di ends in other words.
The micro-channel heat exchanger of the present embodiment, the radial direction area of heat exchanger body 001 is axially varying, thus forms big
Cause the inclined-plane for taper so that the water of heat exchanger surface attachment is easier to be pooled to fin edge, is changed as air flow departs from
Hot device, while can be flowed down along tapered slope, draining is easier, so as to effectively improve the heat exchange property of heat exchanger, and should
Heat exchanger body 001 includes multiple flat tubes that parallel interval is set, and the fin between flat tube, simple in construction, easy to process
Make.
Flat tube 100 can be set with the central axis upright of heat exchanger body 001 or relative to heat exchanger sheet
The central axis of body 001 is obliquely installed.As a kind of enforceable mode, the 3rd side wall 130 of each flat tube 100 is with respect to
Four side walls 140 are close to the central axis of heat exchanger body 001, and the 3rd side wall 130 and the 4th side wall 140 are and heat exchanger body
001 central axis is in angle.So, each flat tube 100 tilts both with respect to the central axis of heat exchanger body 001, even if
It is also inclined plane to obtain the surface of flat tube 100, is easy to flow down so as to be easy to the condensed water on the surface of flat tube 100, further increases heat exchange
The heat exchange property of device.
As shown in Figure 1, it is assumed that it is respectively to turn into first layer flat tube from top to bottom, second layer flat tube, by that analogy, orlop
Flat tube is referred to as i-th layer.Referring specifically to Fig. 3, because the 3rd side wall 130 of each flat tube 100 is close both with respect to the 4th side wall 140
The central axis of heat exchanger body 001, and the central axis of the 3rd side wall 130 and the 4th side wall 140 with heat exchanger body 001
In angle, while also need to ensure that each flat tube is parallel to each other interval, then first layer flat tube inclines relative to the central shaft of heat exchanger body 001
When tiltedly setting, its 4th side wall 140 is compared with the 3rd central shaft of the side wall 130 away from heat exchanger body 001, and the of second layer flat tube
Three side walls 130 are parallel relative with the 4th side wall 140 of first layer flat tube, then second layer flat tube is departed slightly from compared with first layer flat tube and changed
The central shaft of hot device body, by that analogy, ultimately form the taper that external diameter from top to bottom becomes big heat exchanger body vertically
Inclined-plane.
In use (referring to Fig. 6), each flat tube 100 is inclined relative to horizontal the heat exchanger body 001,
Therefore the water condensed on flat tube 100 is easy to along under inclined surface current, and the heat exchange breadth of heat exchanger entirety is also inclined, and this is changed
The tapered slope of hot device body 001 causes heat exchanger surface laying dust, rainwater, condensate etc. to be easier to be blown off, and is more easy to automatic
Collect and flow to bottom below heat exchanger and drain, clean and maintenance is more convenient.
Referring to Fig. 4, as a kind of enforceable mode, flat tube 100 is in circular arc along length extension, and towards heat exchanger sheet
The central axis bending of body 001, the then heat exchanger body 001 formed are generally round table-like.
Referring to Fig. 7, as another enforceable mode, flat tube 100 includes multiple arc sections and multiple straightways, respectively
Arc section is the concave arc-shaped section of the central axis bending towards heat exchanger body 001, then the heat exchanger body 001 formed is generally
The mesa-shaped of pyramidal surface shape.
As a kind of enforceable mode, micro-channel heat exchanger also includes the first header 300 and the second header 400,
The both ends of multiple flat tubes 100 are connected with the first header 300 and the second header 400 respectively；The axis phase of first header 300
Tilted for the axis of the second header 400.
Certainly, in other embodiments, the axis of the axis of the first header 300 and the second header 400 can also be
It is parallel to each other.
As a kind of enforceable mode, each flat tube 100 includes the Part I being connected with the first header 300, the
A part is perpendicular to the first header 300；
Each flat tube 100 also includes the Part II being connected with the second header 400, and Part II is perpendicular to the second afflux
Pipe 400.
Certainly, in other embodiments, Part I can be inclined, Part II relative to the first header 300
It is inclined relative to the second header 400.
The connected mode of flat tube 100 and header can have it is a variety of, as a kind of enforceable mode, the first header
On 300 along its it is axially arranged have multiple first slots, one end of multiple flat tubes 100 is inserted into multiple first slots correspondingly
In；
On second header 400 along its it is axially arranged have multiple second slots, the other end of multiple flat tubes 100 corresponds
Ground is inserted into multiple second slots.
The end vertical insertion header of flat tube 100, make the convenient processing of slot inserted on header for flat tube 100.And
The spacing of multiple first slots and the spacing of multiple second slots can be consistent with the spacing of flat tube 100 so that heat exchanger assembles
It is convenient.
The embodiment of the present invention additionally provides a kind of source pump, including the as above Thermal Performance of Micro Channels described in any embodiment
Device, so as to which the source pump can have the advantages of heat exchange efficiency is high, and the clean and maintenance of heat exchanger assembly facilitates.Certainly, this is micro-
Channel heat exchanger can also be applied in air-conditioner set, or other freeze, in the heat-exchange system of heating.
Referring to Fig. 1 to Fig. 5, the embodiment of the present invention additionally provides a kind of preparation method of micro-channel heat exchanger, this method bag
Include with step：
S100：Processing obtains the different flat tube 100 of multiple length, and the fin 200 that multiple length are different.
Where it is assumed that the cone angle of taper heat exchanger body 001 after shaping is α, the heat exchanger body 001 after shaping it is small
A diameter of D1 is held, the top plan view circumference angle of the heat exchanger body 001 after shaping is β, and the thickness of flat tube 100 is δ, fin 200
Highly it is h, expanded angle γ.
Also it is Fig. 3 expanded views in then if the length of the top-down each layer of flat tube 100 of Fig. 1 is its circumference
The circumference of each layer of outside flat tube 100.Therefore have：
1st layer of flat tube length
2nd layer of flat tube length
3rd layer of flat tube length
4th layer of flat tube length
……
I-th layer of flat tube length
Further, the length of fin 200 with the expanded view of heat exchanger body 001 positioned at two neighboring flat tube 100
On the basis of the girth of fin 200 in centre position, then have：
1st layer of finned length
2nd layer of finned length
3rd layer of finned length
4th layer of finned length
……
I-th layer of finned length
S200：Multiple flat tubes 100 pre-fold curving arc-shaped by respective default radius bend respectively.
Wherein, the radius bend of each layer of flat tube 100 follows following computation rule：
ByObtain
1st layer of flat tube radius bend
2nd layer of flat tube radius bend
3rd layer of flat tube radius bend
4th layer of flat tube radius bend
……
I-th layer of flat tube radius bend
S300：By multiple flat tubes 100, incremental direction is arranged in order along its length, by the corresponding flat tube 100 of multiple fins 200
Length be assembled in successively in the interval of two flat tubes 100；
S400：The both ends of each flat tube 100 are respectively inserted into pre-assembled in the slot of header obtain substantially in fan ring
The plane heat exchanger (substantially as shown in Figure 5) of shape, the plane heat exchanger of fan annular is inserted welding fabrication is carried out in soldering oven.
S500：The plane heat exchanger for fanning annular is subjected to bending by the bender that cone angle is α, is substantially conical with being formed
Heat exchanger body (substantially as shown in Figure 1).Wherein, the angular range of the cone angle is 0~90 °.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
Apply all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the present invention, and its description is more specific and detailed, but simultaneously
Can not therefore it be construed as limiting the scope of the patent.It should be pointed out that come for one of ordinary skill in the art
Say, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Scope.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (12)
- A kind of 1. micro-channel heat exchanger, it is characterised in that including：The axially varying heat exchanger body of entire outer diameter (001), institute Stating heat exchanger body (001) includes some flat tubes (100) at the interval that is parallel to each other, and is arranged between the flat tube (100) Fin (200).
- 2. micro-channel heat exchanger according to claim 1, it is characterised in that the flat tube (100), which has, circumferentially encloses what is set Four side walls, respectively relative the first side wall (110) and second sidewall (120), and the 3rd relative side wall (130) and Four side walls (140), the fin (200) between adjacent two flat tubes (100) connect flat tube (100) respectively 3rd side wall (130) of the 4th side wall (140) and another flat tube (100).
- 3. micro-channel heat exchanger according to claim 2, it is characterised in that the 3rd side wall of each flat tube (100) (130) central axis with respect to the 4th side wall (140) close to the heat exchanger body (001), and the 3rd side wall (130) With the central axis of the heat exchanger body (001) it is in angle with the 4th side wall (140).
- 4. micro-channel heat exchanger according to claim 1, it is characterised in that the flat tube (100) is along length extension in circle Arc, and bent towards the central axis of the heat exchanger body (001).
- 5. micro-channel heat exchanger according to claim 1, it is characterised in that the flat tube (100) includes multiple arc sections And multiple straightways, each arc section are the concave arc-shaped section of the central axis bending towards the heat exchanger body (001).
- 6. micro-channel heat exchanger according to claim 1, it is characterised in that the heat exchanger body (001) also includes the One header (300) and the second header (400), the both ends of multiple flat tubes (100) respectively with first header (300) connected with second header (400)；The axis of first header (300) is relative to second header (400) axis tilts.
- 7. micro-channel heat exchanger according to claim 6, it is characterised in that each flat tube (100) include with it is described The Part I of first header (300) connection, the Part I is perpendicular to first header (300)；Each flat tube (100) also includes the Part II being connected with second header (400), and the Part II hangs down Directly in second header (400).
- 8. the micro-channel heat exchanger according to claim 6 or 7, it is characterised in that along it on first header (300) Axially arranged to have multiple first slots, one end of multiple flat tubes (100) is inserted into multiple described first and inserted correspondingly In groove；Axially arranged there are multiple second slots, the other end of multiple flat tubes (100) along its on second header (400) It is inserted into correspondingly in multiple second slots.
- 9. micro-channel heat exchanger according to claim 1, it is characterised in that multiple flat tubes (100) are between identical Away from arrangement.
- 10. a kind of source pump, it is characterised in that including the micro-channel heat exchanger as described in claim any one of 1-9.
- 11. a kind of preparation method of micro-channel heat exchanger, it is characterised in that comprise the following steps：Processing obtains the different flat tube of multiple length (100), and the fin (200) that multiple length are different；Multiple flat tubes (100) pre-fold curving arc-shaped by respective default radius bend respectively；By multiple flat tubes (100), incremental direction is arranged in order along its length, by the corresponding flat tube (100) of multiple fins (200) Length is assembled in the interval of two flat tubes (100) successively；The both ends of each flat tube (100) are respectively inserted into pre-assembled in the slot of header obtain substantially in the plane of fan annular Heat exchanger, the plane heat exchanger of fan annular is inserted welding fabrication is carried out in soldering oven；The plane heat exchanger for fanning annular is subjected to bending by the bender that cone angle is α, to form the heat exchanger being substantially conical Body (001).
- 12. the preparation method of micro-channel heat exchanger according to claim 11, it is characterised in that the angle of the cone angle Scope is 0~90 °.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710606757.9A CN107461966A (en) | 2017-07-24 | 2017-07-24 | Heat pump unit, micro-channel heat exchanger and manufacturing method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710606757.9A CN107461966A (en) | 2017-07-24 | 2017-07-24 | Heat pump unit, micro-channel heat exchanger and manufacturing method thereof |
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| CN105928258A (en) * | 2016-06-17 | 2016-09-07 | 珠海格力电器股份有限公司 | Heat exchanger and air conditioner |
| CN207455956U (en) * | 2017-07-24 | 2018-06-05 | 珠海格力电器股份有限公司 | Heat pump set and microchannel heat exchanger |
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