CN109668468B - Fin assembly, micro-channel heat exchanger and air conditioner - Google Patents

Fin assembly, micro-channel heat exchanger and air conditioner Download PDF

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Publication number
CN109668468B
CN109668468B CN201811428372.9A CN201811428372A CN109668468B CN 109668468 B CN109668468 B CN 109668468B CN 201811428372 A CN201811428372 A CN 201811428372A CN 109668468 B CN109668468 B CN 109668468B
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CN
China
Prior art keywords
fin
fins
heat exchanger
grooves
axial direction
Prior art date
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Active
Application number
CN201811428372.9A
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Chinese (zh)
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CN109668468A (en
Inventor
黎优霞
陈志伟
张福臣
李成俊
王现林
吴俊鸿
彭光前
陈英强
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Gree Electric Appliances Inc of Zhuhai
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Gree Electric Appliances Inc of Zhuhai
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Priority to CN201811428372.9A priority Critical patent/CN109668468B/en
Publication of CN109668468A publication Critical patent/CN109668468A/en
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Publication of CN109668468B publication Critical patent/CN109668468B/en
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Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00Tubular elements; Assemblies of tubular elements
    • F28F1/10Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/12Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being only outside the tubular element
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25BREFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
    • F25B39/00Evaporators; Condensers
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F28F9/26Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2215/00Fins
    • F28F2215/06Hollow fins; fins with internal circuits
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28HEAT EXCHANGE IN GENERAL
    • F28FDETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00Fastening; Joining
    • F28F2275/06Fastening; Joining by welding

Abstract

The invention provides a fin assembly, a micro-channel heat exchanger and an air conditioner, and relates to the technical field of refrigeration equipment. The heat exchanger comprises a plurality of fins, wherein cavities are formed in the fins along the axial direction of the fins, and the cavities are communicated along the axial direction of the fins; and the flat tubes are fixed between every two adjacent fins. The fin assembly, the microchannel heat exchanger and the air conditioner are arranged in a structure with a through cavity inside, and when the fin and the flat tube are in a normal vertical installation state, condensed water and defrosting water on the fin can freely flow along the inner wall surface of the cavity by gravity at the beginning of generation, so that the microchannel frosting condition is delayed, and the device can be normally used in a low-temperature working condition; the energy consumption of the fan is not required to be increased, and the installation is simple.

Description

Fin assembly, micro-channel heat exchanger and air conditioner
Technical Field
The invention relates to the technical field of refrigeration equipment, in particular to a fin assembly, a micro-channel heat exchanger and an air conditioner.
Background
The air conditioner heat pump operates under a low-temperature working condition, and frosting occurs in the outdoor opportunity, so that the heating capacity of the air conditioner is reduced. The condensation water and defrosting water of the micro-channel heat exchanger are not well discharged due to the influence of the existing fin structure, so that the frosting problem is more serious. The frosting problem becomes the biggest constraint condition for the low-temperature working condition of the micro-channel heat exchanger.
In order to solve the problem of condensate water discharge in the prior art, the micro-channel heat exchanger is obliquely installed to play a role in guiding flow, and then the condensate water is taken away by means of air outlet of the fan.
Disclosure of Invention
The invention aims to solve the technical problem of unsmooth condensate water discharge of the existing air conditioner heat exchanger, and mainly aims to provide a fin assembly, a micro-channel heat exchanger and an air conditioner, wherein the fin assembly is used for effectively discharging condensate water without increasing energy consumption and is simple to install.
In a first aspect, an embodiment of the present invention provides a fin assembly for connecting with a flat tube of a microchannel heat exchanger, including a plurality of fins, wherein a cavity is formed in each fin along an axial direction thereof, and the cavity is penetrated along the axial direction of the fin; and the flat tubes are fixed between two adjacent fins.
Further, in a preferred embodiment of the present invention, a plurality of through holes are provided on the outer wall of the fin.
Further, in a preferred embodiment of the present invention, a plurality of through grooves are provided on the outer wall of the fin, and the through grooves penetrate in the thickness direction of the fin; the through groove is located in a direction intersecting with an axial direction of the fin.
Further, in a preferred embodiment of the present invention, the through groove is perpendicular to the axial direction of the fin.
Further, in a preferred embodiment of the present invention, the through grooves are disposed on two opposite sides of the fin, and the through grooves on one side of the fin are staggered with the through grooves on the other side of the fin structure.
Further, in a preferred embodiment of the present invention, the fin is provided with a guide seam along an axial direction thereof.
Further, in a preferred embodiment of the present invention, the fins are integrally formed as a single spiral structure; or the fin comprises a plurality of oval fin units, and the fin units are axially and equidistantly arranged to form a single-spiral structure.
Further, in a preferred embodiment of the present invention, two adjacent single-helical structures are symmetrically arranged with respect to the axial center line of the fin to form a double-helical structure.
In a second aspect, an embodiment of the present invention provides a microchannel heat exchanger, including flat tubes and any one of the fin assemblies described above, where one fin is disposed between two adjacent flat tubes.
Further, in a preferred embodiment of the present invention, the flat tube and the fin are welded and fixed.
In a third aspect, an embodiment of the present invention provides an air conditioner, including a microchannel heat exchanger as described in any one of the preceding claims.
According to the fin assembly, the microchannel heat exchanger and the air conditioner provided by the embodiment of the invention, the fins are arranged to be of the structure with the through cavities inside, and when the fins and the flat tubes are in the conventional vertical installation state, condensed water and defrosting water on the fins can freely flow along the inner wall surfaces of the cavities by gravity at the beginning of generation, so that the microchannel frosting condition is delayed, and the microchannel heat exchanger can be normally used in a low-temperature working condition; the energy consumption of the fan is not required to be increased, and the installation is simple.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
FIG. 1 is a perspective view of a microchannel heat exchanger according to one embodiment of the present invention;
FIG. 2 is an enlarged schematic view at A in FIG. 1;
FIG. 3 is a front view of a microchannel heat exchanger according to one embodiment of the present invention;
FIG. 4 is an enlarged schematic view at B in FIG. 3;
FIG. 5 is a top view of an assembled flat tube and fin according to one embodiment of the present invention;
FIG. 6 is an enlarged schematic view at C in FIG. 5;
FIG. 7 is a schematic perspective view of a fin according to an embodiment of the present invention;
FIG. 8 is an enlarged schematic view of FIG. 7 at D;
FIG. 9 is a front view of a fin provided in an embodiment of the present invention;
FIG. 10 is a back view of FIG. 9;
FIG. 11 is a schematic view of a single helical fin according to an embodiment of the present invention;
FIG. 12 is a schematic view of a fin with a double helix structure according to one embodiment of the present invention.
Reference numerals:
1 fin 11 through groove 12 diversion joint 13 welding area 14 cavity
2 flat tube 3 liquid collecting tube
Detailed Description
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some examples of the present invention and therefore should not be considered as limiting the scope, and that other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Referring to fig. 1 to 6, wherein fig. 1 to 2 are perspective structural views illustrating a microchannel heat exchanger according to an embodiment of the present invention; fig. 3 to 4 are front views of a microchannel heat exchanger according to an embodiment of the present invention; fig. 5 to 6 are plan views showing an assembled state of the flat tube 2 and the fin 1 according to the embodiment of the present invention.
As shown in fig. 1 to 6, the microchannel heat exchanger provided by the embodiment of the invention comprises a fin assembly and a plurality of flat tubes 2, wherein the flat tubes 2 are taken as microchannels for flowing a refrigerant. As shown in fig. 1, each of the microchannel heat exchangers is further provided with a liquid collecting tube 3, each of the two adjacent flat tubes 2 is arranged between one fin 1, the flat tube 2 is installed between the two liquid collecting tubes 3, and the flat tubes 2 are communicated with the liquid collecting tubes 3, so that the refrigerant can continue to complete the refrigeration or heating cycle.
1-6, a fin assembly according to an embodiment of the present invention is used for being connected with a flat tube 2 of a microchannel heat exchanger, and includes a plurality of fins 1, wherein a cavity 14 is formed inside each fin 1 along an axial direction of the fin, and the cavity 14 is penetrated along the axial direction of the fin 1; and the flat tubes 2 are fixed between every two adjacent fins 1. The fin 1 is provided with a structure with a through cavity 14 inside, when the fin 1 and the flat tube 2 are in a normal vertical installation state, condensed water and defrosting water on the fin 1 can freely flow along the inner wall surface of the cavity 14 by gravity at the beginning of generation, and the frosting condition of a micro-channel is delayed, so that the fin can be normally used in a low-temperature working condition; the energy consumption of the fan is not required to be increased, and the installation is simple.
In addition, the embodiment is suitable for vertical installation under the conventional condition, and can have no obstruction to the flow of condensed water; in other cases, the micro-channel heat exchanger may have other installation angles, so that in order to enable the micro-channel heat exchanger to flow in other installation angles, in the fin assembly provided by the preferred embodiment of the invention, a plurality of through holes are arranged on the outer wall of the fin 1, preferably, the through holes can be arranged on two sides of the central line of the fin 1 relatively, the number and the specific positions of the through holes are not limited, and the through holes are arranged on the side surfaces of the fin 1, so that when the micro-channel heat exchanger is installed horizontally or obliquely, the condensed water can flow along the axial direction of the fin 1 and can flow out through the arranged through holes, and the phenomenon of frosting caused by accumulation of condensed water or frosting water is prevented.
Fig. 7 to 8 are schematic perspective views of a fin 1 according to an embodiment of the present invention; fig. 9 is a front view of the fin 1 shown according to the embodiment of the present invention; fig. 10 is a rear view of the fin 1 shown according to the embodiment of the present invention; as shown in the drawing, a schematic structural view of a fin 1 according to a preferred embodiment of the present invention is provided.
In a preferred embodiment of the present invention, a plurality of through grooves 11 are provided on the outer wall of the fin 1, and the through grooves 11 penetrate in the thickness direction of the fin; the through grooves 11 are located in a direction intersecting the axial direction of the fin 1. Since the fin 1 itself is also flat, the through grooves 11 are preferably provided on both sides of the center line of the fin 1, and the through grooves 11 intersect with the axial direction or the center line of the fin 1. The through grooves 11 are arranged so that condensed water can flow through the through grooves 11, and the device is suitable for more installation angles of the micro-channel heat exchanger; the arrangement of the through grooves 11 or the through holes does not obstruct the air flow, so that the turbulent flow effect can be achieved, and the heat exchange efficiency of the heat exchanger is improved.
As shown in fig. 7 to 10, in the fin assembly provided by the embodiment of the invention, the through grooves 11 are perpendicular to the axial direction of the fin 1, and form a comb-tooth-like structure, so that the fin 1 does not obstruct the flow of condensed water, and the fin 1 structure provided by the axial cavity 14 and the transverse through grooves 11 is suitable for installing a micro-channel heat exchanger at any angle, thereby improving the application range. It should be noted that, the axial direction according to the embodiment of the present application is the longitudinal direction of the fin 1, and the direction of the through groove 11 in the embodiment is perpendicular to the axial direction.
In order to improve the heat exchange efficiency, as shown in fig. 7 to 10, in a preferred embodiment of the present invention, the through grooves 11 are oppositely disposed at two sides of the fin 1, and the direction of reading the drawing in fig. 9 shows that in this embodiment, the through grooves 11 are further disposed at two sides of the center line of the fin 1, and the through grooves 11 on one side of the fin 1 and the through grooves 11 on the other side of the fin 1 are staggered, so that the fin 1 structure is mutually abducted left and right, which does not hinder the air flow, and meanwhile plays a role of turbulence, and improves the heat exchange efficiency. .
As shown in fig. 5 to 9, in a preferred embodiment of the present invention, the fin 1 is provided with a flow guiding seam 12 along the axial direction thereof, that is, the seam of the fin 1, so that effective flow guiding of condensed water can be achieved, and the flow guiding seam 12 is arranged to facilitate air flow transmission and promote effective heat exchange of the fin 1. FIG. 11 is a schematic view showing the structure of a fin 1 of a single helical structure according to an embodiment of the present invention; fig. 12 is a schematic structural view of a double helical fin 1 according to an embodiment of the present invention.
As shown in fig. 11, in the fin 1 assembly provided in other embodiments of the present invention, the fin 1 is in an integrally formed single spiral structure, similar to a spiral structure form of a spring, but when the fin 1 with a single spiral structure is assembled with the flat tube 2, a fixing area is smaller than that of the fin 1 with a comb tooth structure form, but the technical effects of not blocking the flow of condensed water and defrosting water can still be achieved, and any angle of installation can be achieved.
Or, in the single spiral structure fin 1 provided in another embodiment, the fin 1 includes a plurality of oval fin units, and a plurality of fin units are arranged at equal intervals along an axial direction to form a single spiral structure, so that the flow of condensed water is not blocked, and the frosting problem of the air conditioner outdoor unit is improved.
As shown in fig. 12, in the fin assembly provided in other embodiments of the present invention, each two adjacent single-spiral structures are symmetrically arranged with respect to the axial center line of the fin 1 to form a double-spiral structure, so that the fin 1 and the flat tube 2 with the single-spiral structure are more firmly fixed, and the heat exchange effect is better.
Other arrangements of the single helical fins 1 are possible in other embodiments to obtain fins 1. It should be emphasized that obvious arrangements and modifications of the above-described comb-tooth structure, single-helix structure, double-helix structure of the fins 1 should be within the scope of the present application.
In the micro-channel heat exchanger provided by the other embodiment of the invention, the flat tubes 2 and the fins 1 can be connected through a welding process, such as a brazing process and the like.
In the microchannel heat exchanger provided by the embodiment of the invention, considering the heat transfer problem between the fin 1 and the flat tube 2, as shown in fig. 6 to 9, the front surface shown in the front view and the back surface shown in the back view of the fin 1 can be seen, the fin 1 is structurally provided with the welding area 13, the welding area 13 is convenient for welding the fin 1 and the flat tube 2, and compared with the traditional microchannel heat exchanger, the welding area 13 has large heat exchange area and high heat exchange efficiency.
In addition, in the microchannel heat exchanger provided by the embodiment of the invention, the flat tube 21 and the fins 12 are made of aluminum or aluminum alloy with low ductility and low cost, and can also be made of other metals, such as copper, iron, stainless steel and the like.
An air conditioner provided by another embodiment of the present invention includes the microchannel heat exchanger as described in any one of the above, and the air conditioner having the fin 1 and the heat exchanger as described above, so that the problem of defrosting of an outdoor unit is effectively improved.
In the description of the present invention, it should be understood that the terms "upper", "lower", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, that is, the corresponding orientations when the air conditioner is normally installed. It is used merely for convenience in describing the invention and to simplify the description and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operate in a particular orientation, and thus should not be construed as limiting the invention.
Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "a plurality" is two or more, unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, and various modifications and variations may be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (7)

1. A fin assembly for connection with a flat tube (2) of a microchannel heat exchanger, comprising a plurality of fins (1), the interior of the fins (1) forming cavities (14) along their axial direction, and the cavities (14) being through-going along the axial direction of the fins (1); the flat tubes (2) are fixed between two adjacent fins (1); a plurality of through grooves (11) are formed in the outer wall of the fin (1), and the through grooves (11) penetrate through in the thickness direction of the fin; the through grooves (11) are positioned in a direction intersecting with the axial direction of the fin (1); the through grooves (11) are perpendicular to the axial direction of the fin (1); the through grooves (11) are oppositely arranged on two sides of the fin (1), and the through grooves (11) on one side of the fin (1) are staggered with the through grooves (11) on the other side of the fin (1).
2. The fin assembly according to claim 1, wherein the fin (1) is provided with a guide seam (12) along its axial direction.
3. The fin assembly according to claim 1, wherein the fins (1) are of integrally formed single spiral construction; or, the fin (1) comprises a plurality of oval fin units, and the fin units are axially and equidistantly arranged to form a single-spiral structure.
4. A fin assembly according to claim 3, wherein adjacent two of said single helical structures are symmetrically arranged with respect to the axial centre line of said fin (1) to form a double helical structure.
5. A microchannel heat exchanger, characterized by comprising flat tubes (2) and fin assemblies according to any one of claims 1-4, one of the fins (1) being arranged between two adjacent flat tubes (2).
6. The microchannel heat exchanger according to claim 5, wherein the flat tubes (2) are welded and fixed to the fins (1).
7. An air conditioner comprising the microchannel heat exchanger of any one of claims 5-6.
CN201811428372.9A 2018-11-27 2018-11-27 Fin assembly, micro-channel heat exchanger and air conditioner Active CN109668468B (en)

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Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811428372.9A CN109668468B (en) 2018-11-27 2018-11-27 Fin assembly, micro-channel heat exchanger and air conditioner

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CN109668468A CN109668468A (en) 2019-04-23
CN109668468B true CN109668468B (en) 2024-04-05

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Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06147785A (en) * 1992-11-04 1994-05-27 Hitachi Ltd Outdoor heat exchanger for heat pump
KR20040017967A (en) * 2002-08-23 2004-03-02 엘지전자 주식회사 Regenerator
KR20040037684A (en) * 2002-10-29 2004-05-07 엘지전자 주식회사 Drainage apparatus for regenerator
JP2005201492A (en) * 2004-01-14 2005-07-28 Matsushita Electric Ind Co Ltd Heat exchanger
CN201181140Y (en) * 2008-03-27 2009-01-14 Tcl集团股份有限公司 Evaporator of air conditioner
CN203216159U (en) * 2013-04-01 2013-09-25 嵊州市合力制冷设备厂 Air conditioner evaporator
CN205448411U (en) * 2016-01-08 2016-08-10 浙江同星制冷有限公司 Add hot type heat exchanger
CN106288526A (en) * 2016-08-31 2017-01-04 合肥美的电冰箱有限公司 Micro-channel heat exchanger and refrigerator, wind cooling refrigerator
CN108020099A (en) * 2016-10-28 2018-05-11 盾安环境技术有限公司 A kind of micro-channel heat exchanger
CN209689459U (en) * 2018-11-27 2019-11-26 珠海格力电器股份有限公司 Fin component, micro-channel heat exchanger and air conditioner

Patent Citations (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06147785A (en) * 1992-11-04 1994-05-27 Hitachi Ltd Outdoor heat exchanger for heat pump
KR20040017967A (en) * 2002-08-23 2004-03-02 엘지전자 주식회사 Regenerator
KR20040037684A (en) * 2002-10-29 2004-05-07 엘지전자 주식회사 Drainage apparatus for regenerator
JP2005201492A (en) * 2004-01-14 2005-07-28 Matsushita Electric Ind Co Ltd Heat exchanger
CN201181140Y (en) * 2008-03-27 2009-01-14 Tcl集团股份有限公司 Evaporator of air conditioner
CN203216159U (en) * 2013-04-01 2013-09-25 嵊州市合力制冷设备厂 Air conditioner evaporator
CN205448411U (en) * 2016-01-08 2016-08-10 浙江同星制冷有限公司 Add hot type heat exchanger
CN106288526A (en) * 2016-08-31 2017-01-04 合肥美的电冰箱有限公司 Micro-channel heat exchanger and refrigerator, wind cooling refrigerator
CN108020099A (en) * 2016-10-28 2018-05-11 盾安环境技术有限公司 A kind of micro-channel heat exchanger
CN209689459U (en) * 2018-11-27 2019-11-26 珠海格力电器股份有限公司 Fin component, micro-channel heat exchanger and air conditioner

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