WO2020042425A1 - Tube d'échange de chaleur et climatiseur associé - Google Patents

Tube d'échange de chaleur et climatiseur associé Download PDF

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Publication number
WO2020042425A1
WO2020042425A1 PCT/CN2018/120241 CN2018120241W WO2020042425A1 WO 2020042425 A1 WO2020042425 A1 WO 2020042425A1 CN 2018120241 W CN2018120241 W CN 2018120241W WO 2020042425 A1 WO2020042425 A1 WO 2020042425A1
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WO
WIPO (PCT)
Prior art keywords
heat exchange
exchange tube
fin
fins
tube according
Prior art date
Application number
PCT/CN2018/120241
Other languages
English (en)
Chinese (zh)
Inventor
刘华
张治平
岳清学
胡东兵
王春连
胡海利
Original Assignee
珠海格力电器股份有限公司
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 珠海格力电器股份有限公司 filed Critical 珠海格力电器股份有限公司
Publication of WO2020042425A1 publication Critical patent/WO2020042425A1/fr

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Classifications

    • 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
    • F28F1/10—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses
    • F28F1/42—Tubular elements and assemblies thereof with means for increasing heat-transfer area, e.g. with fins, with projections, with recesses the means being both outside and inside the tubular element
    • 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
    • F25B39/04—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
    • F25B2339/00—Details of evaporators; Details of condensers
    • F25B2339/04—Details of condensers
    • F25B2339/047—Water-cooled 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
    • F28F2215/00—Fins
    • F28F2215/10—Secondary fins, e.g. projections or recesses on main fins

Definitions

  • the present disclosure relates to the field of refrigeration technology, and in particular, to a heat exchange tube and an air conditioner.
  • Water-cooled condensers have developed rapidly due to their compact structure and wide applicability. High efficiency, energy saving and replacement of new refrigerants are still the main research directions at present.
  • Water-cooled heat exchangers are mostly horizontal shell-and-tube heat exchangers. Freon is taken in the shell side and water is taken in the tube side.
  • a factor that has a relatively large effect on its heat exchange is the performance of the heat exchange tubes in the shell. Inside the shell side, the refrigerant outside the condensing tube undergoes a phase change for heat exchange. The refrigerant condenses outside the tube to form a liquid film covering the surface of the heat exchange tube.
  • the current general strengthening technology is to use a combination cutter to extrude metal fins that spirally expand along the circumference of the tube through a combination cutter, and perform secondary rolling on the fins to form a boss and sharp corners.
  • the main strengthening mechanism is to increase the surface area outside the tube.
  • the thinned liquid film reduces the thermal resistance by using different bosses and sharp corners and radius of curvature.
  • the lower fins are spirally connected and form channels. Drain the liquid refrigerant. In this way, a convex plate and a sharp, sharp-angled thin liquid film are formed. At the same time, the formed convex plate also increases the resistance of the liquid film to drip and remove.
  • the embodiments of the present disclosure provide a heat exchange tube and an air conditioner to solve the technical problem that the liquid refrigerant existing on the surface of the heat exchange tube during use is obviously flooded on the surface.
  • An embodiment of the present disclosure provides a heat exchange tube including a tube body and fins disposed on an outer surface of the tube body. A channel is formed between adjacent fins, and a communication groove is formed on the fin. The communication grooves will be adjacent to each other. The communication channel is connected, and the communication groove is used for circulating the refrigerant.
  • the fins are coiled on the outer surface in a circumferential direction of the outer surface, and the communication groove is opened on the fins in the axial direction of the outer surface.
  • the fins are spirally arranged on the outer surface.
  • the fins are multiple, and the multiple fins are spaced apart on the outer surface.
  • the communication groove is opened deep on the fin to the bottom of the fin, or is opened to a predetermined length from the bottom of the fin.
  • the communication groove is disposed at an angle ⁇ with respect to the extending direction of the fin, and 0 ° ⁇ 90 °.
  • the cross-section of the communication groove is V-shaped, U-shaped, or Y-shaped.
  • a boss structure is pressed on the fin, and the boss structure is used to increase the surface area of the fin.
  • the boss structure includes a groove portion on the top of the fin and a sharp corner portion protruding relative to the side of the fin.
  • the boss structure is disposed at an angle ⁇ with respect to the extending direction of the fin, 15 ° ⁇ ⁇ ⁇ 65 °.
  • an inner rib structure is formed on the inner surface of the pipe body, and the inner rib structure is used to increase the surface area of the inner surface.
  • the inner rib structure is arranged on the inner surface in a spiral shape, and the inner rib structure is arranged at an angle ⁇ with respect to the center of the pipe body, 15 ° ⁇ ⁇ ⁇ 60 °.
  • the inner rib structure has a trapezoidal or triangular cross section.
  • the present disclosure also provides an air conditioner including a heat exchange tube, and the heat exchange tube is the above-mentioned heat exchange tube.
  • the communication grooves formed on the fins can make adjacent channels communicate, increase the area of the liquid refrigerant discharge channel after condensation, strengthen the refrigerant discharge capacity, and allow the refrigerant to be better on the surface of the heat exchange tube. Ground circulation. Furthermore, the excessive increase of the thickness of the liquid refrigerant on the surface of the heat exchange tube can be avoided, the flooding phenomenon on the surface of the heat exchange tube can be avoided, the effective heat exchange area can be ensured, and the heat exchange effect can be increased.
  • FIG. 1 is a schematic diagram of an overall structure of an embodiment of a heat exchange tube according to the present disclosure
  • FIG. 2 is a partial structural schematic diagram of the heat exchange tube of FIG. 1;
  • FIG. 3 is a partially enlarged structure diagram of FIG. 2; FIG.
  • FIG. 4 is a schematic plan view of the structure of FIG. 3;
  • FIG. 5 is a schematic view of the front view structure of FIG. 3; FIG.
  • FIG. 6 is a schematic structural view of the right side of FIG. 3;
  • FIG. 7 is a schematic sectional structural view of the heat exchange tube of FIG. 6.
  • FIG. 1 illustrates an embodiment of a heat exchange tube according to the present disclosure.
  • the heat exchange tube includes a tube body 10 and a fin 20 disposed on an outer surface 11 of the tube body 10.
  • a channel is formed between adjacent fins 20. 30.
  • the fin 20 is provided with a communication groove 21.
  • the communication groove 21 communicates with adjacent channels 30.
  • the communication groove 21 is used for circulating a refrigerant.
  • the adjacent channels 30 can be communicated, the area of the discharge channel of the liquid refrigerant after condensation is increased, the refrigerant discharge capacity is enhanced, and the refrigerant can be exchanged in The surface of the tube circulates better. Furthermore, the excessive increase of the thickness of the liquid refrigerant on the surface of the heat exchange tube can be avoided, the flooding phenomenon on the surface of the heat exchange tube can be avoided, the effective heat exchange area can be ensured, and the heat exchange effect can be increased.
  • the fins 20 are coiled on the outer surface 11 in the circumferential direction of the outer surface 11, and the communication groove 21 is opened on the fins 20 in the axial direction of the outer surface 11.
  • the above-mentioned winding arrangement along the circumferential direction of the outer surface 11 may be provided along the radial direction of the outer surface 11 or in a direction at an angle to the radial direction; Opening in the axial direction also refers to communicating adjacent channels 30 in the axial direction or in a direction at an angle to the axial direction.
  • the fins 20 are spirally arranged on the outer surface 11.
  • the fins 20 are multiple, and the multiple fins 20 are disposed at intervals on the outer surface 11, that is, a plurality of annular fins 20 are disposed on the outer surface 11.
  • the cross section of the communication groove 21 is Y-shaped, and the depth of the communication groove 21 on the fin 20 is opened to a predetermined length from the bottom of the fin 20.
  • the communication groove 21 is deeply opened on the fin 20 to the bottom of the fin 20. It should be noted that the depth of the communication groove 21 on the fin 20 should be as deep as possible on the basis of ensuring the stress intensity of the fin 20.
  • the cross-section of the communication groove 21 may also be V-shaped or U-shaped.
  • the plurality of communication grooves 21 are disposed at intervals on the fin 20.
  • the refrigerant discharge capacity can be further enhanced, so that the refrigerant can flow better on the surface of the heat exchange tube. It has been found through experiments that the number of communication grooves 21 uniformly distributed from 30 to 100 along the circumferential direction of the fins 20 can have a good refrigerant discharge capability.
  • the communication groove 21 is set at an angle ⁇ with respect to the extending direction of the fin 20, and 0 ° ⁇ ⁇ 90 °. Since the outer surface 11 of the fin 20 is spirally arranged, allowing the communication groove 21 to be arranged at an angle relative to the fin 20 is also beneficial to the circulation of the refrigerant in the axial direction. In addition, it is also possible to make the communication groove 21 perpendicular to the extending direction of the fin 20.
  • the fin 20 is pressed with a boss structure 22.
  • the boss structure 22 is used to increase the surface area of the fins 20 and can improve heat exchange efficiency during heat exchange.
  • the boss structure 22 includes a groove portion 221 on the top of the fin 20 and a sharp corner portion 222 protruding from the side of the fin 20. In this way, while increasing the heat exchange area, the sharp corners on the surface of the condenser tube are increased and strengthened. Using the characteristics of the large curvature of the corners 222 and the grooves 221, the refrigerant liquid film is thinned, thereby strengthening local condensation and condensation. The ability to play a role in strengthening the upper layer of the condenser tube to reduce the thickness of the liquid film adhered to the fins on the surface of the condenser tube when the refrigerant vapor condenses.
  • the boss structure 22 is disposed at an angle ⁇ with respect to the extending direction of the fin 20, and 15 ° ⁇ ⁇ ⁇ 65 °.
  • the outer surface 11 of the fin 20 is spirally arranged, so that the boss structure 22 is arranged at an angle with respect to the fin 20, which is also conducive to the circulation of the refrigerant in the axial direction. Heat exchange.
  • the groove portion 221 is formed by extruding the top of the original fin using a knurling die to form a groove portion structure having a depth of 0.1 to 0.45 mm and a width of 0.01 to 0.35 mm. . While forming the groove portion 221, due to the good plasticity of the metal material itself, two sharp corner portions 222 are naturally formed on both sides of the fin 20, and the structure of the sharp corner portions 222 extending to the side of the fin 20 is 0.05 ⁇ 0.2mm.
  • an inner rib structure 40 is formed on the inner surface of the pipe body 10.
  • the inner rib structure 40 is used to increase the surface area of the inner surface, which can improve the heat exchange efficiency during heat exchange, and also increases the degree of disturbance of the fluid in the tube, which can further enhance the heat exchange efficiency.
  • the inner rib structure 40 is spirally disposed on the inner surface, and the inner rib structure 40 is disposed at an angle ⁇ with respect to the center of the pipe body 10, 15 ° ⁇ ⁇ ⁇ 60 °.
  • the inner rib structures 40 are multiple, and the multiple inner rib structures 40 are evenly distributed on the inner surface. In some embodiments, there are 10 to 80 internal rib structures.
  • the inner surface of the pipe body 10 is rolled into a spiral convex rib structure 40 with a core of a pressure groove.
  • the inner rib structure 40 is disposed at an angle ⁇ with respect to the center of the pipe body 10, and the protrusion height of the inner rib structure 40 from the inner surface is 0.2 to 0.60 mm.
  • the cross section of the inner rib structure 40 is trapezoidal, and the cross section shaped inner rib structure 40 is more convenient for processing and has better heat exchange capability.
  • the bottom of the inner rib structure 40 is integrated with the inner surface and has a smooth transition with the inner surface, and the two corners have a smooth transition.
  • the cross section of the inner rib structure 40 may also be triangular.
  • the above-mentioned heat exchange tube is processed by a dedicated fin processing equipment, and an extrusion molding and chipless processing process is adopted.
  • a mother pipe with an outer diameter of 19.05mm and a wall thickness of 1.1mm is used for processing.
  • a grooved mold is used to roll the grooves on the mother tube outside the tube, and the formed grooves are pressed with a combination tool to form independent fins that spiral in the axial direction. Deformation caused by processing fins on the independent fins To form a communication groove.
  • the top of the fins is simultaneously extruded with a knurling die to form a boss structure.
  • the inner rib structure 40 is reinforced and synchronized. While the outer surface is squeezed by a combination cutter, the inner side is formed by a multi-head grooved core.
  • the present disclosure also provides an air conditioner including the above-mentioned heat exchange tube.
  • the air conditioner using the above heat exchange tube has better heat exchange performance and higher refrigeration efficiency.

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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

L'invention concerne un tube d'échange de chaleur et un climatiseur associé. Le tube d'échange de chaleur comprend un corps (10) de tube et des ailettes (20) disposées sur une surface externe du corps (10) du tube, un canal (30) étant formé entre des ailettes (20) adjacentes ; chaque ailette (20) est munie d'une rainure de communication (21) ; la rainure de communication (21) met en communication des canaux (30) adjacents ; et la rainure de communication (21) est utilisée pour faire circuler un fluide frigorigène. L'aire d'un canal d'évacuation pour le fluide frigorigène liquide après la condensation est augmentée, la capacité d'évacuation du fluide frigorigène est renforcée, et le fluide frigorigène peut mieux circuler sur la surface du tube d'échange de chaleur, évitant ainsi une diminution de l'efficacité d'échange de chaleur provoquée par une augmentation de la résistance à la chaleur due à une augmentation excessive de l'épaisseur de fluide frigorigène liquide sur la surface du tube d'échange de chaleur.
PCT/CN2018/120241 2018-08-30 2018-12-11 Tube d'échange de chaleur et climatiseur associé WO2020042425A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201811003111.2A CN109099748A (zh) 2018-08-30 2018-08-30 换热管及空调器
CN201811003111.2 2018-08-30

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WO2020042425A1 true WO2020042425A1 (fr) 2020-03-05

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WO (1) WO2020042425A1 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110108148A (zh) * 2019-05-29 2019-08-09 珠海格力电器股份有限公司 换热管及设有其的空调器
CN111854502A (zh) * 2020-07-08 2020-10-30 珠海格力电器股份有限公司 换热管及空调机组

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1103481A (zh) * 1993-07-07 1995-06-07 株式会社神户制钢所 用于降膜式蒸发器的热交换管
US20060075773A1 (en) * 2002-04-19 2006-04-13 Petur Thors Heat transfer tubes, including methods of fabrication and use thereof
CN204142071U (zh) * 2014-10-10 2015-02-04 湖南湘投金天新材料有限公司 异形换热管
CN107860248A (zh) * 2017-10-27 2018-03-30 珠海格力电器股份有限公司 一种微通道换热器及空调
CN108387131A (zh) * 2018-05-02 2018-08-10 珠海格力电器股份有限公司 换热管、换热器及热泵机组
CN109099750A (zh) * 2018-08-30 2018-12-28 珠海格力电器股份有限公司 换热管及热泵机组
CN109099746A (zh) * 2018-08-30 2018-12-28 珠海格力电器股份有限公司 换热管及空调器
CN109141094A (zh) * 2018-08-30 2019-01-04 珠海格力电器股份有限公司 换热管及空调器

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1103481A (zh) * 1993-07-07 1995-06-07 株式会社神户制钢所 用于降膜式蒸发器的热交换管
US20060075773A1 (en) * 2002-04-19 2006-04-13 Petur Thors Heat transfer tubes, including methods of fabrication and use thereof
CN204142071U (zh) * 2014-10-10 2015-02-04 湖南湘投金天新材料有限公司 异形换热管
CN107860248A (zh) * 2017-10-27 2018-03-30 珠海格力电器股份有限公司 一种微通道换热器及空调
CN108387131A (zh) * 2018-05-02 2018-08-10 珠海格力电器股份有限公司 换热管、换热器及热泵机组
CN109099750A (zh) * 2018-08-30 2018-12-28 珠海格力电器股份有限公司 换热管及热泵机组
CN109099746A (zh) * 2018-08-30 2018-12-28 珠海格力电器股份有限公司 换热管及空调器
CN109141094A (zh) * 2018-08-30 2019-01-04 珠海格力电器股份有限公司 换热管及空调器

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