CN108954922A - Microchannel heat exchanger and air conditioner - Google Patents

Microchannel heat exchanger and air conditioner Download PDF

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Publication number
CN108954922A
CN108954922A CN201810989918.1A CN201810989918A CN108954922A CN 108954922 A CN108954922 A CN 108954922A CN 201810989918 A CN201810989918 A CN 201810989918A CN 108954922 A CN108954922 A CN 108954922A
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CN
China
Prior art keywords
pipe
flat
partition plate
collecting pipe
heat exchanger
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201810989918.1A
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Chinese (zh)
Inventor
张福臣
王现林
罗袁伟
李成俊
黎优霞
刘鹏
黄坚
吴俊鸿
陈志伟
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
Original Assignee
Gree Electric Appliances Inc of Zhuhai
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gree Electric Appliances Inc of Zhuhai filed Critical Gree Electric Appliances Inc of Zhuhai
Priority to CN201810989918.1A priority Critical patent/CN108954922A/en
Publication of CN108954922A publication Critical patent/CN108954922A/en
Pending legal-status Critical Current

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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
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F1/00—Tubular elements; Assemblies of tubular elements
    • F28F1/02—Tubular elements of cross-section which is non-circular
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2260/00—Heat exchangers or heat exchange elements having special size, e.g. microstructures
    • F28F2260/02—Heat exchangers or heat exchange elements having special size, e.g. microstructures having microchannels

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Geometry (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention provides a microchannel heat exchanger and an air conditioner, wherein the microchannel heat exchanger comprises: the collecting pipe is provided with a flat pipe port which can allow the flat pipe to be inserted into the inner cavity of the collecting pipe; the partition plate can be attached to the flat pipe and integrally inserted into the opening of the flat pipe together with the flat pipe; the inner cavity of the collecting pipe can be communicated with the micro-channel in the flat pipe, and the partition plate can divide the inner cavity of the collecting pipe into two or more cavities. According to the invention, the flat pipe port can be simultaneously inserted into the flat pipe and the partition plate, and no partition plate groove is required to be additionally cut, so that the collecting pipe has excellent structural strength, compressive strength and sealing performance compared with the collecting pipe with the partition plate grooves, and the structural strength and the compressive strength of the collecting pipe are effectively improved; the assembly is simple, the assembly difficulty and the production cost are greatly reduced, the production time is saved, the structure is simple and reasonable, and the application range is very wide.

Description

Microchannel heat exchanger and air conditioner
Technical Field
The invention belongs to the technical field of air conditioners, and particularly relates to a micro-channel heat exchanger and an air conditioner.
Background
The micro-channel heat exchanger has the advantages of low manufacturing cost, light weight, compact structure, good heat exchange effect, low refrigerant filling amount and the like, is widely used in the civil and military refrigeration field, and is one of the development directions of future heat exchangers. The main manufacturing process of the traditional microchannel heat exchanger is integral brazing, namely the structure is assembled, coated with a brazing flux and brazed at high temperature. The partition plate of the micro-channel heat exchanger is inserted into the collecting pipe through the partition plate groove to play a role in distributing the refrigerant. The operation is still carried out manually at present, the working efficiency is slow, and the full-automatic production of the micro-channel heat exchanger is seriously influenced. The current manufacturing technology does not realize the automatic installation operation of the partition board, so the key process problem needs to be solved.
In addition, since the conventional micro channel heat exchanger cuts the partition plate groove on the manifold, the structural strength of the manifold is reduced, and the welding and sealing quality and the pressure resistance are affected.
In view of the above problems, there are still many technical problems in the prior art although improvements are made. For example, patent CN105485972A "a microchannel heat exchanger and an installation method" discloses a microchannel heat exchanger and an installation method, where the microchannel heat exchanger includes a collecting pipe and a distribution pipe arranged in the collecting pipe, the distribution pipe is provided with a plurality of distribution holes along an axial direction, ends of flat pipes are inserted into the collecting pipe side by side, the distribution pipe is integrally fixed with a plurality of partition plates along the axial direction, the distribution pipe is movably inserted into the collecting pipe, a sealing member for fixing the distribution pipe is also inserted into the collecting pipe, and the partition plates, the sealing member and the inner wall of the collecting pipe are matched to separate a plurality of independent liquid separation regions in the collecting pipe. The invention keeps the complete structure of the collecting pipe by integrally fixing the partition plate and the distributing pipe and then movably inserting the partition plate and the distributing pipe into the collecting pipe. Although this patent avoids the drawbacks caused by the conventional structure of cutting the partition plate groove, the disclosed technology has great difficulty in implementation, is complicated in operation, and cannot realize automatic installation operation, and particularly, the fixing between the closing member for fixing the partition plate and the collecting main increases the technical difficulty of this patent. Patent CN106610247A "microchannel heat exchanger and baffle connection structure thereof" discloses a microchannel heat exchanger and baffle connection structure thereof, and the baffle connection structure of microchannel heat exchanger includes: the collecting pipe is provided with a first hole and a second hole for the partition to penetrate through, and the length of the first hole is smaller than that of the second hole; the baffle is equipped with: and the limiting structure is clamped with the collecting pipe at the first hole and limits the partition plate to move from the first hole to the second hole. According to the partition plate connecting structure of the micro-channel heat exchanger, the partition plate is prevented from moving from the first hole to the second hole by arranging the limiting structure on the partition plate, the partition plate is prevented from falling off from the collecting pipe before welding, and therefore welding of the partition plate and the collecting pipe is prevented from being influenced. However, the outstanding defects of the invention are that the welding quality and the compressive strength are influenced by excessive holes of the collecting main, and the connecting structure of the partition plate with a very complicated shape is formed. Patent CN104422331B "microchannel heat exchanger and baffle thereof" discloses a microchannel heat exchanger and baffle thereof, and the baffle of microchannel heat exchanger is used for sealing the runner of the collector tube of microchannel heat exchanger, and this microchannel heat exchanger's baffle includes: the end parts of the first flat plate and the second flat plate are connected in a rotating way; the first flat plate and the second flat plate are respectively provided with a boss which is used for abutting against the inner wall of the liquid collecting pipe so as to limit the separation of the partition plate and the liquid collecting pipe, and the bosses are arranged on one side of the first flat plate, which is far away from the second flat plate, and on one side of the second flat plate, which is far away from the first flat plate. According to the partition plate of the micro-channel heat exchanger, the boss is clamped with the inner wall of the liquid collecting pipe, so that the partition plate and the liquid collecting pipe can be fixedly connected, a partition plate groove is not eliminated, manual operation is still needed for installation of the partition plate, the structure of the partition plate is complex, and the process time and the cost are increased.
In summary, the structure strength and the compressive strength of the collecting pipe are affected by the partition plate grooves of the traditional micro-channel heat exchanger. The installation of the partition board completely depends on manual operation, which wastes time and labor. Although the prior art is improved to some extent in view of the above problems, the partition plate groove cannot be eliminated fundamentally, the production efficiency cannot be increased, and even the production cost cannot be increased greatly. Therefore, it is highly desirable to find a solution to the above technical problems.
Because the structural strength and the compressive strength of a collecting pipe are influenced by the division of the partition plate groove in the conventional micro-channel heat exchanger in the prior art, the installation of the partition plate completely depends on manual operation, and the technical problems of time and labor waste, low production efficiency, high production cost and the like are solved, and the micro-channel heat exchanger and the air conditioner are researched and designed.
Disclosure of Invention
The invention aims to solve the technical problem of overcoming the defects of low structural strength and low compressive strength of a collecting pipe due to the fact that the structural strength and the compressive strength of the collecting pipe are influenced by the partition plate groove of the micro-channel heat exchanger in the prior art, and thus the micro-channel heat exchanger and the air conditioner are provided.
The present invention provides a microchannel heat exchanger, comprising:
the collecting pipe is provided with a flat pipe port which can allow the flat pipe to be inserted into the inner cavity of the collecting pipe;
the partition plate can be attached to the flat pipe and integrally inserted into the opening of the flat pipe together with the flat pipe; the inner cavity of the collecting pipe can be communicated with the micro-channel in the flat pipe, and the partition plate can divide the inner cavity of the collecting pipe into two or more cavities.
Preferably, the first and second electrodes are formed of a metal,
the partition plates are welded on the plane of one side of the flat pipe in an attaching mode; or the partition plates are laminated and superposed on the plane of one side of the flat pipe.
Preferably, the first and second electrodes are formed of a metal,
the collector pipe extends along the vertical direction, the flat pipe extends along the horizontal direction, and the partition plate is welded or overlapped on the lower side plane of the flat pipe in an attaching mode; or,
the collecting pipe extends along the horizontal direction, the flat pipe extends along the vertical direction, and the partition plate is welded or overlapped on a plane on one side of the flat pipe in the horizontal direction in a fitting mode.
Preferably, the first and second electrodes are formed of a metal,
the baffle comprises an insertion part and a connecting part which are connected, the insertion part can be inserted into the collecting pipe, the front end of the insertion part is abutted to the inner wall of the collecting pipe in a matched mode and can seal and separate the inner cavity of the collecting pipe, and the connecting part is attached to one side plane of the flat pipe.
Preferably, the first and second electrodes are formed of a metal,
in the extension plane of the partition plate, the projection of the insertion part is of a semicircular structure, the radius of the semicircular structure is equal to the radius R of the inner wall of the collecting pipe, the projection of the connecting part is rectangular, and the length a of the rectangle satisfies the following relation: and a is more than or equal to R + k and less than or equal to 3R, wherein a is the length of the rectangle, k is the wall thickness of the collecting pipe, and the width c of the rectangle is 2R.
Preferably, the first and second electrodes are formed of a metal,
the thickness b of the partition is equal to the thickness of the flat pipe; and/or along the extending direction of the partition plate, the length e of the margin of the partition plate exposed outside the collecting pipe meets the following requirements: e is more than or equal to 0 and less than or equal to R.
Preferably, the first and second electrodes are formed of a metal,
along the length direction of the flat pipe, the depth h of the flat pipe inserted into the collecting pipe meets the following relation: h is more than or equal to 0 and less than or equal to 2R.
Preferably, the first and second electrodes are formed of a metal,
after the partition plate and the flat pipe are integrally inserted into the flat pipe opening, the partition plate, the flat pipe and the collecting pipe are integrally brazed.
Preferably, the first and second electrodes are formed of a metal,
the collecting pipe comprises a collecting pipe body, a collecting pipe body and a baffle plate, wherein the collecting pipe body is provided with a collecting pipe inner cavity, the baffle plate is arranged on the collecting pipe.
The invention also provides an air conditioner which comprises the micro-channel heat exchanger.
The micro-channel heat exchanger and the air conditioner provided by the invention have the following beneficial effects:
1. the partition plates are attached to the flat pipes and are integrally inserted into the openings of the flat pipes; the inner cavity of the collecting pipe can be communicated with the micro-channel in the flat pipe, and the partition plate can divide the inner cavity of the collecting pipe into two or more cavities, so that the width of a specific flat pipe opening on the collecting pipe is widened compared with the prior art, the flat pipe opening can be simultaneously inserted into the flat pipe and the partition plate, and no partition plate groove is required to be additionally cut, so that the collecting pipe has excellent structural strength, compressive strength and sealing performance compared with the collecting pipe with the partition plate grooves cut, and the structural strength and the compressive strength of the collecting pipe are effectively improved;
2. the traditional circular partition plate and partition plate groove structures are eliminated, and the partition plate groove does not need to be additionally cut, so that the assembly is simple, the assembly difficulty and the production cost can be greatly reduced, the automatic installation is very suitable, the production time can be greatly saved, the manufacturing cost is low, the structure is simple and reasonable, and the application range is very wide; and through the mode of baffle, flat pipe and the whole welding of collecting main, have good welding effect between integral structure and the collecting main, can effectively prevent that the interior hourglass phenomenon at baffle position from taking place.
Drawings
Fig. 1 is a schematic perspective view of an integrated structure of a flat tube and a partition plate in embodiment 1 of a microchannel heat exchanger according to the present invention;
FIG. 2 is a schematic top view of the structure of FIG. 1;
FIG. 3 is a schematic elevation view of the structure of FIG. 1;
FIG. 4 is a schematic perspective view of the separator of FIG. 1;
FIG. 5 is a schematic view of an assembly structure among a collecting pipe, a flat pipe and a partition plate in the microchannel heat exchanger according to the present invention;
FIG. 6 is a schematic structural view of a microchannel heat exchanger according to the present invention;
fig. 7 is a schematic perspective view of an integrated structure of a flat tube and a partition plate in embodiment 2 of the microchannel heat exchanger of the present invention.
The reference numbers in the figures denote:
1. a header pipe; 11. a flat pipe orifice; 2. flat tubes; 21. a microchannel; 3. a partition plate; 31. an insertion portion; 32. a connecting portion; 4. a fin; 51. an inflow pipe; 52. a discharge pipe; 6. and (4) end covers.
Detailed Description
As shown in fig. 1-7, the present invention provides a microchannel heat exchanger comprising:
the collecting pipe comprises a collecting pipe 1 and a flat pipe 2, wherein a flat pipe port 11 which can allow the flat pipe 2 to be inserted into an inner cavity of the collecting pipe 1 is arranged on the collecting pipe 1;
the flat tube connector also comprises a clapboard 3, wherein the clapboard 3 can be attached to the flat tube 2 and is integrally inserted into the flat tube opening 11 together with the flat tube; after the partition plate and the flat pipe are integrally inserted into the flat pipe opening, the inner cavity of the collecting pipe 1 can be communicated with the micro-channel inside the flat pipe 2, and the partition plate 3 can divide the inner cavity of the collecting pipe 1 into two or more cavities.
The partition plates are attached to the flat pipes and are integrally inserted into the openings of the flat pipes; the collecting pipe inner cavity can be communicated with the micro-channel inside the flat pipe, and the partition plate can divide the collecting pipe inner cavity into two or more cavities, so that the width of a specific flat pipe opening on the collecting pipe is widened compared with the prior art, the flat pipe opening can be simultaneously inserted into the flat pipe and the partition plate, a partition plate groove does not need to be additionally cut, the collecting pipe has excellent structural strength, compressive strength and sealing performance compared with the collecting pipe with the cut partition plate groove, and the structural strength and the compressive strength of the collecting pipe are effectively improved.
Because the traditional circular partition plate and partition plate groove structures are cancelled, the partition plate groove does not need to be additionally cut, so that the assembly is simple, the assembly difficulty and the production cost can be greatly reduced, the automatic installation is very suitable, the production time can be greatly saved, the manufacturing cost is low, the structure is simple and reasonable, and the application range is very wide.
The widening refers to increasing the width of the flat tube hole originally used for inserting the flat tube, die cutting can be carried out by a die, the flat tube hole with the normal size can be manufactured together at one time, and the process steps of the prior art cannot be increased. And the spacer holes need to be cut separately and positioned on the opposite side of the flat tube holes. More than 2 flat pipe holes are cut on one collecting pipe. Therefore, the invention is equivalent to the collecting pipe processing task which needs to be finished in two steps in the prior art, and can be finished by one step, and meanwhile, the processing technology of the flat pipe hole is not changed. Not only is efficient manufacturing achieved, but also system reliability is increased (structural strength and air-tightness are enhanced).
End cover 6: and the circular covers are used for closing two ends of the collecting pipe.
Header 1: the micro-channel heat exchanger is used for installing a flat pipe and a cylindrical pipeline for distributing a refrigerant, and a flat pipe opening and a refrigerant inlet and outlet pipe opening are punched on the cylindrical pipeline.
An outlet pipe and an inlet pipe: the refrigerant flows into and out of the pipeline of the micro-channel heat exchanger.
And (4) fins: and the metal sheets such as aluminum sheets or copper sheets are arranged between the adjacent flat pipes and used for increasing the heat dissipation area of the flat pipes.
Flat tube 2: aluminum or other metal is processed into a long-strip-shaped pipeline with a plurality of micro-channels 21 inside by a certain process method.
A separator 3: the clapboard is matched with the collecting pipe to divide the collecting pipe into a plurality of refrigerant flow paths. In the conventional art, it is necessary to cut a partition groove on a header and then insert a partition for assembly. The mounting mode reduces the structural strength and the sealing performance of the collecting pipe, and only depends on manual operation, so that the operation efficiency is low, and the integral automatic design is influenced. According to the invention, the width of a specific flat pipe opening on the collecting pipe 1 is widened, and then the flat pipe and the specially designed partition plate are inserted into the flat pipe opening and brazed with the whole heat exchanger, so that the purpose of convenient installation of the partition plate is achieved. The structure and the installation mode provided by the invention can greatly improve the structural strength and the sealing property of the flow tube, and the flow tube is simple to assemble and easy to realize large-scale automatic operation. The multi-loop micro-channel heat exchanger is manufactured by matching the partition plates and the flat pipes.
Preferably, the first and second electrodes are formed of a metal,
embodiment 1 as shown in fig. 1 to 3, the partition plate 3 is welded to a side plane of the flat tube 2; the connection mode between the partition board and the flat pipe in embodiment 1 of the invention is that the width of a special flat pipe opening on the collecting pipe 1 is widened, then the flat pipe and the specially designed partition board are inserted into the flat pipe opening at the same time and are brazed with the whole heat exchanger, so that the purposes of convenient installation of the partition board and no need of additionally cutting the hole of the partition board are achieved, wherein the partition board and the flat pipe form an integrated structure in a pre-welding mode, and therefore, the operation and the installation are convenient.
Embodiment 2 is shown in fig. 7, or the partition 3 is laminated on one side plane of the flat tube 2. Since the separator and the separator in example 1 need to be welded together in advance, the process flow and time are increased. In view of the above problems, the present invention provides an embodiment 2, that is, the partition plate and the flat tube are not welded in advance, but are inserted into the flat tube hole during the assembling process, and then are brazed with the heat exchanger as a whole. This embodiment has the advantage that no pre-welding is required, saving process time and costs.
Preferably, the first and second electrodes are formed of a metal,
as shown in fig. 5 to 6, the collecting pipe 1 extends in a vertical direction, the flat pipe 2 extends in a horizontal direction, and the partition plate 3 is welded or stacked on a lower side plane of the flat pipe 2; or,
the collecting pipe 1 extends along the horizontal direction, the flat pipe 2 extends along the vertical direction, and the partition plate 3 is welded or overlapped on one side plane of the flat pipe 2 in the horizontal direction in a fitting mode. The collecting pipe and the flat pipe of the micro-channel heat exchanger have further structural forms, namely the collecting pipe is vertically arranged, the flat pipe is horizontally arranged, and the partition plate is arranged on the lower side plane of the flat pipe, so that a collecting pipe cavity below the flat pipe and a collecting pipe cavity above the partition plate can be separated to form more than two independent cavities.
Preferably, the first and second electrodes are formed of a metal,
the baffle 3 is including the inserted part 31 and the connecting portion 32 that meet, the inserted part 31 can insert in the pressure manifold 1, and the front end of inserted part 31 with the inner wall phase-match butt of pressure manifold 1, can be right the sealed partition of pressure manifold internal cavity, connecting portion 32 with one side plane laminating of flat pipe 2 meets. The baffle plate can be inserted into the cavity of the collecting pipe through the insertion part, and the front end of the baffle plate is matched and connected with the interior of the collecting pipe, so that the upper fluid and the lower fluid of the baffle plate can be kept independent of each other in sealing, the phenomenon of fluid channeling can be prevented, and the baffle plate can be effectively connected with the flat pipe through the connecting part, such as a welding or overlapping connection mode.
Preferably, the first and second electrodes are formed of a metal,
in the extending plane of the partition board 3, the projection of the insertion portion 31 is a semicircular structure, the radius of the semicircular structure is equal to the radius R of the inner wall of the header, the projection of the connection portion 32 is a rectangle, and the length a of the rectangle satisfies the following relationship: and a is more than or equal to R + k and less than or equal to 3R, wherein a is the length of the rectangle, k is the wall thickness of the collecting pipe, and the width c of the rectangle is 2R. The inserting part and the connecting part of the partition board are further optimized in structural form, the inserting part is in a semicircular structure, the radius of the inserting part is equal to the inner diameter of the collecting pipe, the inserting part can be tightly attached to the inner wall of the collecting pipe, fluid leakage caused by gaps is prevented, the sealing performance is guaranteed, the length of the connecting part is larger than or equal to the radius of the inner wall of the collecting pipe plus the wall thickness of the collecting pipe, the connecting part can be at least longer than half of the length of the collecting pipe, the upper limit of the rectangular length is set to be not more than 3R, the partition board is prevented from being too long, the cost is saved, the rectangular width is set to be the diameter width of the inner wall of the collecting pipe, the effect of sealing and sealing the collecting pipe can be achieved, and the sealing performance is.
Preferably, the first and second electrodes are formed of a metal,
the thickness b of the partition 3 is equal to the thickness of the flat tube. Designing according to the actual pressure-resistant grade, and preferably selecting the thickness b equal to the thickness of the flat pipe; and/or along the extending direction of the partition plate 3, the length e of the margin of the partition plate 3 exposed outside the collecting pipe satisfies the following condition: e is more than or equal to 0 and less than or equal to R. The thickness of the partition plate can be designed according to the actual pressure-resistant grade, the partition plate is preferably equal to the thickness of the flat pipe, the sufficient pressure-resistant effect on the fluid can be guaranteed, the safety performance and the working reliability are guaranteed, the length e of the external allowance of the partition plate is set to be more than or equal to 0, and referring to fig. 5, the length of the allowance is the distance between the free end of the partition plate and the rightmost extending position of the collecting pipe in the cross section which passes through the center of the collecting pipe and is cut along the length direction of the flat pipe, so that the partition plate can be effectively guaranteed to perform the whole sealing effect on the inner cavity of the collecting pipe, and the allowance cannot.
Preferably, the first and second electrodes are formed of a metal,
along the length direction of the flat pipe, the depth h of the flat pipe 2 inserted into the collecting pipe 1 satisfies the following relation: h is more than or equal to 0 and less than or equal to 2R. Therefore, the free end of the flat pipe can be ensured to extend into the collecting pipe, so that the fluids in the collecting pipe and the collecting pipe can be communicated with each other and do not exceed 2R, namely the other end of the collecting pipe is not extended.
Preferably, the first and second electrodes are formed of a metal,
after the partition plate 3 and the flat pipe 2 are integrally inserted into the flat pipe opening 11, the partition plate 3, the flat pipe 2 and the collecting pipe 1 are integrally brazed. Through the mode of integrally welding the partition plate, the flat pipe and the collecting pipe, the integrated structure and the collecting pipe have good welding effect, and the internal leakage phenomenon of the partition plate part can be effectively prevented
More than one micro-channel 21 is arranged inside the flat pipe 2 along the length direction of the flat pipe in an extending mode, and the micro-channels can be communicated with the inner cavity of the collecting pipe.
Preferably, the first and second electrodes are formed of a metal,
the number of the partition plates is more than two so as to divide the internal cavity of the collecting pipe into more than three independent cavities, and preferably, the two partition plates are divided into three independent cavities. And/or, the flat pipe 2 is more than two, and adjacent two still be provided with fin 4 between the flat pipe 2. The heat exchanger is separated into three flow paths by two partition plates, so that the refrigerant is uniformly distributed. The collecting pipe is punched with a plurality of flat pipe holes for inserting the flat pipes 2. Which are closed at both ends by end caps 6. Fins are also installed between the flat tubes to enhance heat exchange. The refrigerant flows in and out through an inlet pipe 51 and an outlet pipe 52 provided in the header 1.
The invention also provides an air conditioner which comprises the micro-channel heat exchanger. The partition plates are attached to the flat pipes and are integrally inserted into the openings of the flat pipes; the collecting pipe inner cavity can be communicated with the micro-channel inside the flat pipe, and the partition plate can divide the collecting pipe inner cavity into two or more cavities, so that the width of a specific flat pipe opening on the collecting pipe is widened compared with the prior art, the flat pipe opening can be simultaneously inserted into the flat pipe and the partition plate, a partition plate groove does not need to be additionally cut, the collecting pipe has excellent structural strength, compressive strength and sealing performance compared with the collecting pipe with the cut partition plate groove, and the structural strength and the compressive strength of the collecting pipe are effectively improved.
Because the traditional circular partition plate and partition plate groove structures are cancelled, the partition plate groove does not need to be additionally cut, so that the assembly is simple, the assembly difficulty and the production cost can be greatly reduced, the automatic installation is very suitable, the production time can be greatly saved, the manufacturing cost is low, the structure is simple and reasonable, and the application range is very wide.
The invention integrally designs and forms the clapboard and the flat pipe, and has the following beneficial effects:
1. the width of a specific flat pipe opening on the collecting pipe is widened, and then the flat pipe opening is simultaneously inserted into the flat pipe and the special-designed partition plate and is brazed with the whole heat exchanger, so that the purpose of conveniently and rapidly installing the partition plate is achieved. The partition plate groove does not need to be additionally cut, so that the assembly is simple, and the assembly difficulty and the production cost can be greatly reduced;
2. because the collecting pipe of the microchannel heat exchange gas provided by the invention is not provided with the cutting partition plate groove, compared with the collecting pipe with the cutting partition plate groove, the collecting pipe has excellent structural strength, compressive strength and sealing performance;
3. the invention cancels the traditional round clapboard and clapboard groove structure, is very suitable for automatic installation and can greatly save the production time;
4. the integrated structure provided by the invention has a good welding effect with the collecting pipe, and can effectively prevent the inner leakage phenomenon of the partition plate;
5. the micro-channel heat exchanger without the partition plate groove has the advantages of low manufacturing cost, simple and reasonable structure and wide application range.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents and improvements made within the spirit and principle of the present invention are intended to be included within the scope of the present invention. The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present invention, and these modifications and variations should also be regarded as the protection scope of the present invention.

Claims (10)

1. A microchannel heat exchanger, characterized in that: the method comprises the following steps:
the collecting pipe (1) is provided with a flat pipe port (11) which can allow the flat pipe (2) to be inserted into an inner cavity of the collecting pipe (1);
the flat tube connector also comprises a clapboard (3), wherein the clapboard (3) can be attached to the flat tube (2) and is integrally inserted into the flat tube opening (11) together with the flat tube; the inner cavity of the collecting pipe (1) can be communicated with the micro-channel in the flat pipe (2), and the partition plate (3) can divide the inner cavity of the collecting pipe (1) into two or more cavities.
2. The microchannel heat exchanger of claim 1, wherein:
the partition plate (3) is welded on a plane on one side of the flat pipe (2) in an attaching mode; or the partition plate (3) is laminated and superposed on the plane of one side of the flat pipe (2).
3. The microchannel heat exchanger of claim 2, wherein:
the collecting pipe (1) extends along the vertical direction, the flat pipe (2) extends along the horizontal direction, and the partition plate (3) is welded or overlapped on the lower side plane of the flat pipe (2) in an attaching mode; or,
the collecting pipe (1) extends along the horizontal direction, the flat pipe (2) extends along the vertical direction, and the partition plate (3) is welded or overlapped in a fitting mode on the plane on one side of the horizontal direction of the flat pipe (2).
4. The microchannel heat exchanger of claim 2, wherein:
baffle (3) are including inserting portion (31) and connecting portion (32) that meet, inserting portion (31) can insert in pressure manifold (1) and the front end of inserting portion (31) with the inner wall phase-match butt of pressure manifold (1), can be right the sealed partition of pressure manifold internal cavity, connecting portion (32) with the laminating of one side plane of flat pipe (2) meets.
5. The microchannel heat exchanger of claim 4, wherein:
in the extension plane of the partition board (3), the projection of the insertion part (31) is in a semicircular structure, the radius of the semicircular structure is equal to the radius R of the inner wall of the collecting pipe, the projection of the connecting part (32) is in a rectangular shape, and the length a of the rectangular shape satisfies the following relation: and a is more than or equal to R + k and less than or equal to 3R, wherein a is the length of the rectangle, k is the wall thickness of the collecting pipe, and the width c of the rectangle is 2R.
6. The microchannel heat exchanger of any one of claims 1-5, wherein:
the thickness b of the partition plate (3) is equal to the thickness of the flat pipe; and/or the length e of the margin of the partition plate (3) exposed outside the collecting pipe along the extension direction of the partition plate (3) meets the following requirements: e is more than or equal to 0 and less than or equal to R.
7. The microchannel heat exchanger of any one of claims 1-6, wherein:
along the length direction of the flat pipe, the depth h of the flat pipe (2) inserted into the collecting pipe (1) meets the following relation: h is more than or equal to 0 and less than or equal to 2R.
8. The microchannel heat exchanger of any one of claims 1-7, wherein:
after the partition plate (3) and the flat pipe (2) are integrally inserted into the flat pipe opening (11), the partition plate (3), the flat pipe (2) and the collecting pipe (1) are integrally brazed.
9. The microchannel heat exchanger of any one of claims 1-8, wherein:
the number of the partition plates is more than two, so that the internal cavity of the collecting pipe is divided into more than three independent cavities; and/or more than two flat pipes (2) are provided, and fins (4) are further arranged between every two adjacent flat pipes (2).
10. An air conditioner, characterized in that: comprising the microchannel heat exchanger of any one of claims 1-9.
CN201810989918.1A 2018-08-28 2018-08-28 Microchannel heat exchanger and air conditioner Pending CN108954922A (en)

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5025855B1 (en) * 1986-07-29 1996-09-24 Showa Aluminum Corp Condenser for use in a car cooling system
US5025855A (en) * 1986-07-29 1991-06-25 Showa Aluminum Kabushiki Kaisha Condenser for use in a car cooling system
JPH02302592A (en) * 1989-05-15 1990-12-14 Nippondenso Co Ltd Heat exchanger
US4960169A (en) * 1989-06-20 1990-10-02 Modien Manufacturing Co. Baffle for tubular heat exchanger header
JPH04288490A (en) * 1991-03-14 1992-10-13 Showa Alum Corp Heat exchanger
US5233756A (en) * 1991-05-14 1993-08-10 Valeo Thermique Moteur Method of making a heat exchanger having a tubular manifold with transverse baffles
US5299635A (en) * 1993-03-05 1994-04-05 Wynn's Climate Systems, Inc. Parallel flow condenser baffle
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CN208936591U (en) * 2018-08-28 2019-06-04 珠海格力电器股份有限公司 Microchannel heat exchanger and air conditioner

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Application publication date: 20181207