CN113624062A - Heat exchanger fin, heat exchanger, heat pump system and electrical equipment - Google Patents

Heat exchanger fin, heat exchanger, heat pump system and electrical equipment Download PDF

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Publication number
CN113624062A
CN113624062A CN202110863372.7A CN202110863372A CN113624062A CN 113624062 A CN113624062 A CN 113624062A CN 202110863372 A CN202110863372 A CN 202110863372A CN 113624062 A CN113624062 A CN 113624062A
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CN
China
Prior art keywords
heat exchanger
heat exchange
heat
fin
substrate
Prior art date
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Pending
Application number
CN202110863372.7A
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Chinese (zh)
Inventor
孙建涛
白树钊
李学忠
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Wuxi Little Swan Electric Co Ltd
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Wuxi Little Swan Electric Co Ltd
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 Wuxi Little Swan Electric Co Ltd filed Critical Wuxi Little Swan Electric Co Ltd
Priority to CN202110863372.7A priority Critical patent/CN113624062A/en
Publication of CN113624062A publication Critical patent/CN113624062A/en
Pending legal-status Critical Current

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    • 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
    • F28F1/12—Tubular 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
    • F28F1/24—Tubular 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 and extending transversely
    • F28F1/32—Tubular 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 and extending transversely the means having portions engaging further tubular elements
    • F28F1/325—Fins with openings
    • 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
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
    • F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
    • F28D1/04—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid with tubular conduits
    • 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
    • F28F2215/08—Fins with openings, e.g. louvers
    • 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

Abstract

An embodiment of the present invention provides a heat exchanger fin, including: the heat exchanger comprises a substrate and a plurality of bridge pieces arranged on the substrate and used for cutting heat exchange airflow, wherein the bridge pieces are provided with bridge piece holes penetrating through the bridge pieces in the thickness direction. The heat exchanger fin in the embodiment of the invention further destroys the boundary layer of the heat exchange airflow flowing through the heat exchanger fin by arranging the bridge piece holes on the bridge pieces, effectively improves the convection heat transfer coefficient of the air side, obviously reduces the thermal resistance, and reduces the pressure drop, thereby further improving the heat exchange effect of the heat exchanger fin.

Description

Heat exchanger fin, heat exchanger, heat pump system and electrical equipment
Technical Field
The invention relates to the field of electric appliances, in particular to a heat exchanger fin, a heat exchanger, a heat pump system and electric equipment.
Background
The heat exchanger is a device for transferring part of heat of hot fluid to cold fluid, and is also called a heat exchanger.
The finned heat exchanger achieves the purpose of enhancing heat transfer by additionally arranging fins on a radiating pipe for transmitting fluid.
In the related technology, the traditional finned heat exchanger has low heat exchange efficiency and large pressure drop.
Disclosure of Invention
In view of this, the present application is directed to a heat exchanger fin capable of improving a heat exchange effect.
In order to achieve the above purpose, the technical solution of the embodiment of the present application is implemented as follows:
an embodiment of the present invention provides a heat exchanger fin, including:
a substrate;
the heat exchanger comprises a substrate, a plurality of bridge pieces arranged on the substrate and used for cutting heat exchange airflow, and bridge piece holes penetrating through the bridge pieces in the thickness direction.
In some embodiments, a plurality of the bridge pieces are stamped from the base sheet.
In some embodiments, the equivalent diameter of the shim holes is no more than one-half the dimension of the shims in the direction of flow of the heat exchange gas stream.
In some embodiments, two adjacent bridges are protrudingly disposed on opposite sides of the substrate in the flow direction of the heat exchange gas flow.
In some embodiments, the equivalent diameter of the upstream shim holes is not smaller than the equivalent diameter of the downstream shim holes in the flow direction of the heat exchange gas stream.
In some embodiments, all the bridge pieces of the heat exchanger fin are divided into a plurality of bridge piece groups, equivalent diameters of bridge piece holes in each bridge piece group are the same, each bridge piece group is sequentially arranged along a flow direction of a heat exchange airflow, and in two adjacent bridge piece groups, equivalent diameters of the bridge piece holes in the downstream bridge piece group are 0.7-0.8 of equivalent diameters of the bridge piece holes in the upstream bridge piece group.
In some embodiments, in a projection of a plane in which the substrate is located, the respective bridges of the heat exchanger fin are arranged along a same straight line.
In some embodiments, the substrate is provided with a plurality of mounting holes for passing the heat exchange tubes therethrough, the mounting holes penetrating the substrate in a thickness direction thereof.
In some embodiments, at least one of the bridge pieces is disposed between two adjacent mounting holes.
The embodiment of the invention also provides a heat exchanger, which comprises a heat exchange tube and a plurality of heat exchanger fins, wherein the heat exchange tube is in heat conduction contact with the substrate; the heat exchanger fins are stacked, an airflow channel is formed between the base plates of every two adjacent heat exchanger fins, and at least part of the bridge pieces extend into the airflow channel.
In some embodiments, the heat exchange tube comprises a heat conducting flat plate, and each of the heat exchanger fins is in contact with a surface of the heat conducting flat plate.
In some embodiments, each of the heat exchanger fins is configured to: is formed by continuously bending a metal plate back and forth.
In some embodiments, the substrates are provided with mounting holes penetrating through the substrates in a thickness direction of the substrates, and the heat exchange tubes are disposed through the mounting holes of the respective substrates.
The embodiment of the invention also provides a heat pump system which is characterized by comprising a compressor, a condenser and an evaporator, wherein the condenser and/or the evaporator adopt the heat exchanger in any one of the preceding embodiments.
The embodiment of the invention also provides electric equipment which comprises the heat pump system in the embodiment.
The heat exchanger fin in the embodiment of the invention further destroys the boundary layer of the heat exchange airflow flowing through the heat exchanger fin by arranging the bridge piece holes on the bridge pieces, effectively improves the convection heat transfer coefficient of the air side, obviously reduces the thermal resistance, and reduces the pressure drop, thereby further improving the heat exchange effect of the heat exchanger fin.
Drawings
FIG. 1 is a schematic view of a heat exchanger fin according to an embodiment of the present invention;
FIG. 2 is an enlarged schematic view of position A of FIG. 1;
FIG. 3 is a partial schematic view of a heat exchanger fin in the embodiment of FIG. 1 from another perspective;
FIG. 4 is a schematic view of a heat exchanger fin according to another embodiment of the present invention;
FIG. 5 is an enlarged schematic view of position B of FIG. 4;
FIG. 6 is a schematic view of a heat exchanger according to an embodiment of the present invention;
FIG. 7 is an enlarged schematic view of position C of FIG. 6;
FIG. 8 is a schematic view of a heat exchanger according to another embodiment of the present invention;
fig. 9 is a schematic diagram showing the comparison of the flow heat exchange performance of the heat exchanger according to an embodiment of the present invention with that of a heat exchanger of the related art having the same size specification but without the provision of the shim holes.
Description of the reference numerals
A substrate 10; mounting holes 10 a; a bridge piece 20; a bridge piece hole 20 a; a heat exchange pipe 30; a heat conductive flat plate 31; airflow passage 40
Detailed Description
It should be noted that, in the present application, technical features in examples and embodiments may be combined with each other without conflict, and the detailed description in the specific embodiment should be understood as an explanation of the gist of the present application and should not be construed as an improper limitation to the present application.
In the description of the present application, the "heat exchange gas flow direction" orientation or positional relationship is based on that shown in fig. 1 or fig. 4, it being understood that such orientation terms are merely for convenience of describing the present application and for simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be considered as limiting the present application.
An embodiment of the present invention provides a heat exchanger fin, and referring to fig. 1 and 4, the heat exchanger fin includes: the heat exchanger comprises a substrate 10 and a plurality of bridge pieces 20 which are arranged on the substrate 10 and used for cutting heat exchange air flow, wherein the bridge pieces 20 are provided with bridge piece holes 20a which penetrate through the bridge pieces 20 along the thickness direction.
Referring to fig. 6, 7 and 8, the heat exchanger according to an embodiment of the present invention further includes a heat exchange tube 30 and a plurality of heat exchanger fins according to any embodiment of the present application, where the heat exchange tube 30 is in heat conductive contact with the substrate 10. The heat exchange tubes 30 are used for flowing a fluid heat exchange medium, which may be a refrigerant, water, or air, and is not limited herein. The fluid heat exchange medium transfers heat to the heat exchange tubes 30, and the heat exchange tubes 30 transfer heat to the heat exchanger fins.
A plurality of heat exchanger fins are arranged in a stacked mode, an airflow channel 40 is formed between the substrates 10 of two adjacent heat exchanger fins, and heat exchange airflow flows through the airflow channel 40, so that heat exchange is carried out between the heat exchange airflow and the heat exchanger fins.
It can be understood that the arrangement number of the heat exchanger fins in a unit volume is increased by the stacking arrangement of the plurality of heat exchanger fins, and the heat exchange effect is improved.
It can be understood that the air flow channel 40 provides a flowing space for the heat exchange air flow, and limits and guides the flow of the heat exchange air flow, so that the heat exchange air flow can flow along a preset path or direction, and the position of the heat exchanger fins is convenient to plan and arrange, so as to obtain a better heat exchange effect. At least part of the bridge piece 20 extends into the airflow channel 40, so that the bridge piece 20 can conveniently cut the heat exchange airflow flowing through the airflow channel 40 to destroy the boundary layer of the heat exchange airflow, and a better heat exchange effect is achieved.
At least a portion of the bridge piece 20 extends into the airflow passage 40. During the flow of the heat exchange gas in the gas flow channel 40, the heat exchange gas flows through the bridge piece 20, and thus, the bridge piece 20 cuts the heat exchange gas.
In the process that the heat exchange airflow flows through the bridge piece 20, the bridge piece 20 cuts the heat exchange airflow, the disturbance effect on the heat exchange airflow is increased, and the heat exchange efficiency is improved. The bridge piece holes 20a destroy the boundary layer of the heat exchange air flow flowing through the surfaces of the bridge pieces 20, improve the convection heat transfer coefficient of the air side, reduce the thermal resistance and improve the heat exchange effect. The edges of the fin holes 20a can cut the airflow flowing into the fin holes 20a again, thereby further improving the heat exchange efficiency. In addition, the bridge piece holes 20a can exchange and mix air flows on two sides of the bridge piece 20 to generate secondary flow, so that the heat exchange effect is enhanced.
In the heat exchanger fin provided by the embodiment of the invention, the bridge piece holes 20a are formed in the bridge pieces 20 to further break the boundary layer of the heat exchange air flow flowing through the heat exchanger fin, so that the convection heat transfer coefficient of the air side is effectively improved, the thermal resistance is obviously reduced, the pressure drop is reduced, and the heat exchange effect of the heat exchanger fin is further improved.
It will be appreciated that a certain heat exchange effect can be achieved by the heat conduction effect during the contact of the substrate 10 with the heat exchange gas flow.
It is understood that the substrate 10 and the bridge piece 20 may adopt a split-mount structure, that is, the substrate 10 and the bridge piece 20 are assembled and connected after being manufactured separately to form the heat exchanger fin, the connection manner adopted is not limited, such as screw connection, adhesion, welding, etc., and the connection manner adopted should reduce the influence on the heat transfer effect between the substrate 10 and the bridge piece 20.
It is understood that the substrate 10 and the bridge piece 20 may be integrally formed to reduce the number of process steps in the manufacturing process.
Illustratively, in some embodiments, the bridge piece 20 is stamped from the substrate 10. The heat exchanger fin is manufactured by adopting a stamping process, on one hand, the substrate 10 and the bridge piece 20 are manufactured by the same plate material, the material properties are the same, and the heat transfer effect between the substrate 10 and the bridge piece 20 is ensured; on the other hand, the manufacturing process is simple and quick, is suitable for batch manufacturing, reduces the material cost and can effectively reduce the production cost.
It will be appreciated that, referring to fig. 1 and 4, the punched bridge piece 20 is cut at both ends in the flow direction of the heat exchange air flow, so as to achieve the purpose of cutting the heat exchange air flow by the bridge piece 20.
It can be understood that the bridge piece holes 20a are formed by a blanking process, so as to simplify the manufacturing process flow of the bridge piece holes 20a, improve the production efficiency and reduce the production cost.
It can be understood that the size of the bridge piece holes 20a is optimized, so that the bridge piece 20 has certain structural strength while the heat exchange effect of the bridge piece holes 20a is ensured.
In some embodiments, the equivalent diameter of the bridge piece aperture 20a is no more than one-half the dimension of the bridge piece 20 in the direction of flow of the heat exchange gas stream. The risk that the strength of the bridge piece 20 is reduced and the bridge piece is easy to deform or even break due to the fact that the edge of the bridge piece hole 20a is close to the outer contour edge of the bridge piece 20 in the process of manufacturing the bridge piece hole 20a is reduced.
The equivalent diameter of the bridge piece hole 20a means the diameter of a circle having the same area as the bridge piece hole 20 a.
The shape of the bridge piece hole 20a is not limited, and may be a triangular hole, a rectangular hole, or the like.
Illustratively, the bridge piece hole 20a is a circular hole, which can reduce stress concentration generated at the position of the bridge piece hole 20a, and is beneficial to punching and manufacturing the bridge piece hole 20a and improving the structural strength of the bridge piece 20.
It can be understood that the number of the bridge piece holes 20a formed in the single bridge piece 20 may be one or multiple, and is flexibly selected according to the heat exchange effect to be achieved. The plurality of the bridge piece holes 20a can continuously destroy the boundary layer of the heat exchange air flow, so that the boundary layer is maintained at a relatively thin thickness, and the heat exchange efficiency is improved.
Illustratively, the size of each of the fins 20 is uniform on the same heat exchanger fin, thereby facilitating uniform fabrication of the fins 20 and improving manufacturing efficiency.
It is understood that in some embodiments, the protruding heights of the different bridge pieces 20 on the surface of the substrate 10 may be different, and the height difference between the different bridge pieces 20 may be formed, so that the boundary layer of the flowing heat exchange air flow can be continuously damaged, and the heat exchange effect is improved. In other embodiments, the height of the protrusions of each bridge piece 20 on the surface of the substrate 10 is the same.
It will be appreciated that the projecting directions of the different bridges 20 on the substrate 10 may be the same or different, and are set according to the requirements to further optimize the heat exchange effect.
Illustratively, in some embodiments, referring to fig. 3, two adjacent bridges 20 are convexly disposed on two opposite sides of the substrate 10 along the flowing direction of the heat exchange air flow, that is, the protruding directions of any two adjacent bridges 20 on the substrate 10 are opposite, so that each bridge 20 is in an uneven staggered arrangement on the substrate 10, on one hand, the heat exchange air flow on two sides of the substrate 10 can flow through the bridges 20, and the turbulence effect on the heat exchange air flow is further enhanced; on the other hand, the two sides of the substrate 10 are provided with the bridge pieces 20, so that the possibility of load deflection of the substrate 10 is reduced, and the overall structure of the heat exchanger fin is more stable.
In some embodiments, the bridge pieces 20 on opposite sides of the substrate 10 are equidistant from the substrate 10. On one hand, the same stamping die is adopted to manufacture each bridge piece 20 in the process of stamping and manufacturing the bridge pieces 20, so that the manufacturing cost is reduced, and the production efficiency is improved; on the other hand, the heat exchange air flow can flow on both sides of the substrate 10 more uniformly, and the stress on both sides of the substrate 10 is uniform while the heat exchange effect is improved.
In some embodiments, the bridges 20 are spaced apart along the flow direction of the heat exchange gas stream, and the portion between two adjacent bridges 20 is a portion of the substrate 10. That is, after one of the bridges 20 is manufactured, another bridge 20 is manufactured at a certain distance in the flowing direction of the heat exchange air flow. On one hand, the heat exchange air flow passing through the two adjacent bridge pieces 20 can be cut and disturbed by the part of the substrate 10, so that the heat exchange efficiency is further improved; on the other hand, the overall strength is further improved, and the whole heat exchanger fin structure is more stable.
In some embodiments, referring to fig. 2 and 5, two adjacent fins 20 are arranged in series in the direction of flow of the heat exchange gas stream. I.e. the next bridge piece 20 is made next to the previous bridge piece 20 in the direction of flow of the heat exchange gas stream. On the premise of ensuring the requirement of structural strength, the bridge pieces 20 are arranged as much as possible in the same size range, so that the destructive effect on the boundary layer of the heat exchange air flow is further improved, and the heat exchange effect is improved.
It will be appreciated that the specific size of the fin openings 20a in different fins 20 can be adjusted to improve the heat exchange effect.
In some embodiments, referring to fig. 1 and 4, the equivalent diameter of the upstream shim holes 20a is no less than the equivalent diameter of the downstream shim holes 20a in the direction of the heat exchange gas stream flow.
When the equivalent diameter of the upstream bridge piece hole 20a is equal to the equivalent diameter of the downstream bridge piece hole 20a, the mass production of the bridge piece holes 20a is facilitated, and the production cost is reduced.
When the equivalent diameter of the upstream bridge piece hole 20a is larger than that of the downstream bridge piece hole 20a, the temperature difference between the upstream bridge piece 20 and the heat exchange air flow along the flow direction of the heat exchange air flow is large, so that the boundary layer of the heat exchange air flow is further damaged by enlarging the size of the bridge piece hole 20a to improve the heat exchange effect; the temperature difference between the downstream bridge piece 20 along the flowing direction of the heat exchange air flow and the heat exchange air flow is small, the effect of improving the heat exchange effect by damaging the boundary layer of the heat exchange air flow is reduced, the size of the bridge piece hole 20a is reduced, and the heat exchange effect is improved by increasing the contact area of the bridge piece 20 and the heat exchange air flow.
It should be noted that, along the flowing direction of the heat exchange gas flow, the upstream and the downstream are in a relative position relationship, not specifically referring to a certain section. That is, with a certain shim hole 20a as a positional reference, the upstream shim hole 20a is located upstream of the shim hole 20a in the flow direction of the heat exchange gas flow, and the downstream shim hole 20a is located downstream of the shim hole 20a in the flow direction of the heat exchange gas flow.
In some embodiments, referring to fig. 1 and 4, all the fins 20 of the heat exchanger fin are divided into a plurality of fin groups (not shown), the equivalent diameter of the fin holes 20a in each fin group is the same, and the fin groups are arranged in sequence along the flowing direction of the heat exchange airflow. The bridge piece holes 20a in the same bridge piece group can be manufactured by the same method, so that the production efficiency is improved, and the production cost is reduced.
In some embodiments, in two adjacent bridge plate groups, the equivalent diameter of the bridge plate hole 20a in the downstream bridge plate group is 0.7 to 0.8 of the equivalent diameter of the bridge plate hole 20a in the upstream bridge plate group, for example, the specific value may be 0.70, 0.75, 0.80, and the like. By adopting the numerical values in the above range, the effect of contact heat exchange is gradually increased while the effect of destroying the boundary layer of the heat exchange air flow is gradually reduced by the bridge piece holes 20a in the flow direction of the heat exchange air flow, so that the heat exchange effect of each position of the heat exchanger fin is kept stable.
Illustratively, the ratio of the equivalent diameters between the above-mentioned sets of the bridge pieces is a fixed value, for example, the bridge piece holes 20a of a heat exchanger fin are sequentially divided into a first group, a second group and a third group along the flow direction of the heat exchange air flow, wherein the equivalent diameter of the bridge piece holes 20a of the second group is 0.75 of the equivalent diameter of the bridge piece holes 20a of the first group, and the equivalent diameter of the bridge piece holes 20a of the third group is 0.75 of the equivalent diameter of the bridge piece holes 20a of the second group. The bridge piece holes 20a can be conveniently manufactured one by personnel according to a fixed ratio, and the manufacturing efficiency is improved.
It will be appreciated that the arrangement of the bridge piece 20 and the substrate 10 should be such as to facilitate manufacture and to facilitate cutting of the heat exchange gas flow by the bridge piece 20.
In some embodiments, referring to fig. 1 and 4, the fins 20 of the heat exchanger fin are arranged along a common line in a projection of the plane of the substrate 10. The bridge pieces 20 are arranged in a straight line for ease of manufacture.
It will be appreciated that the fins 20 may be arranged in a common line along the direction of flow of the heat exchange gas stream. In the process that the heat exchange airflow passes through each bridge piece 20, the heat exchange airflow flows along the linear direction, so that the kinetic energy loss caused by steering of the heat exchange airflow is reduced while the heat exchange airflow exchanges heat with the heat exchanger fins, the speed loss of the heat exchange airflow after flowing through the heat exchanger fins is less, the obstruction of the subsequent entering heat exchange airflow is reduced, and the heat exchange efficiency is improved.
It will be appreciated that the fins 20 may be arranged in a common line perpendicular to the direction of flow of the heat exchange gas stream. So that the heat exchange gas flow is in contact with the fins 20 as much as possible in the cross section in the flow direction thereof, thereby improving the heat exchange effect.
It can be understood that the heat exchanger fin needs to be matched with the heat exchange tube 30 in the heat exchanger to realize the heat exchange function, and therefore, a corresponding structure needs to be arranged on the heat exchanger fin so as to realize the heat conduction with the heat exchange tube 30.
In some embodiments, referring to fig. 4, the substrate 10 is provided with a plurality of mounting holes 10a for the heat exchange pipes 30 to pass through, the mounting holes 10a penetrating the substrate 10 in a thickness direction of the substrate 10. The mounting hole 10a provides a mounting position for heat conduction between the substrate 10 and the heat exchanging pipe 30. The penetration of the heat exchange pipe 30 through the substrate 10 in the thickness direction can be reduced by the mounting hole 10 a.
In some embodiments, the mounting hole 10a may be manufactured by a blanking process, so as to simplify the manufacturing process of the mounting hole 10a, improve the production efficiency, and reduce the production cost.
In some embodiments, referring to fig. 4, at least one bridge piece 20 is disposed between two adjacent mounting holes 10 a. So that the heat exchange air flow can pass through the bridge pieces 20 during the process of flowing between the two adjacent mounting holes 10a to obtain better heat exchange effect.
It is understood that the heat exchange pipe 30 should be made of a material having a good heat conduction property and being easy to manufacture, such as a galvanized plate.
It is understood that the contact between the heat exchanging pipe 30 and the substrate 10 can be a detachable connection, such as a screw connection, a snap connection, etc., for the convenience of routine maintenance and repair workers.
The contact between the heat exchanging pipe 30 and the substrate 10 can also be made by adhesion to simplify the mounting process, and the adhesive should be an adhesive with good thermal conductivity.
In some embodiments, referring to fig. 7, the fins 20 of two adjacent heat exchanger fins are aligned with the plate facing the plate surface, i.e. the two fins 20 extend in parallel and the two fins 20 are aligned on both sides in the flow direction of the heat exchange air flow. In addition, the projecting directions of the mutually aligned bridge pieces 20 are the same. The heat exchange fins are prevented from contacting with each other to block the flow of the heat exchange air flow in the air flow channel 40, so that heat conduction between the heat exchange air flow and the heat exchanger fins is facilitated, and the heat exchange effect is improved.
The spacing distances among the heat exchanger fins are equal, so that heat exchange airflow can uniformly flow among the heat exchanger fins, and the utilization efficiency of the heat exchanger fins is improved.
It will be appreciated that the heat exchange tube 30 should be constructed in a specific manner to facilitate heat transfer between the heat exchange tube 30 and the heat exchanger fins.
In some embodiments, referring to fig. 6, the heat exchange tube 30 includes a heat conductive flat plate 31, and each heat exchanger fin is in contact with a surface of the heat conductive flat plate 31. The heat conducting flat plate 31 enlarges the contact area between the heat exchange tube 30 and the outside, so that more heat exchanger fins can be arranged to be in contact with the heat exchange tube 30, and the heat exchange effect is improved. Meanwhile, the heat exchanger fins are convenient to arrange on the straight guide flat plate, and installation and follow-up overhaul and maintenance are convenient.
It is understood that the heat exchange tube 30 having a rectangular cross section may be surrounded by a plurality of heat conductive flat plates 31.
It will be appreciated that the heat exchanger fins should be easy to manufacture to improve production efficiency and reduce material loss during production.
In some embodiments, referring to fig. 6 and 7, each heat exchanger fin is configured to: is formed by continuously bending a metal plate back and forth. When the heat exchanger fin is manufactured, materials are saved, and material loss in the production process is reduced. Meanwhile, a plurality of heat exchanger fins are stacked one on another to form the airflow passage 40.
It can be understood that the cross section of the heat exchanger fin formed by continuous and reciprocating bending along the flowing direction of the heat exchange airflow is in a U shape or a V shape.
The bent U-shaped fin can reduce stress concentration at the bent position of the heat exchanger fin during the bending process, and meanwhile, the bent part is convenient to be in heat conduction contact with the outer surface of the heat exchange tube 30.
In some embodiments, the heat exchanger fin is made of a single metal plate, and a plurality of heat exchanger fins are arranged in a stacked manner in a thickness direction of the metal plate. Thereby simplifying the production process of the heat exchange gas fin and reducing the production cost.
It will be understood that in a heat exchanger, the heat exchange tubes 30 may be disposed between the heat exchanger fins arranged in a stacked arrangement, or may pass through the heat exchanger fins to be in heat-conducting contact with the heat exchanger fins.
In some embodiments, referring to fig. 4, 7 and 8, the substrates 10 are provided with mounting holes 10a penetrating the substrates 10 in a thickness direction of the substrates 10, and the heat exchanging pipes 30 are inserted into the mounting holes 10a of the respective substrates 10. Each of the heat exchanging pipes 30 passes through the plurality of chips 10 in the extending direction, improving the heat exchanging effect to the fluid in each of the heat exchanging pipes 30. A plurality of heat exchange tubes 30 can pass through each substrate 10, so that the utilization rate of the heat exchange capacity of each heat exchanger fin is improved.
It can be understood that, when flowing between the substrates 10, the heat exchange air flow can collide with the heat exchange tube 30 passing through the substrates 10, so that the heat exchange air flow is turned along the surface of the heat exchange tube 30 and generates a vortex, thereby being beneficial to breaking the boundary layer of the heat exchange air flow and improving the heat exchange effect.
In some embodiments, the heat exchanger fin is processed as follows:
firstly, a metal plate is used as a substrate 10, and a plurality of bridge piece holes 20a are formed on the metal plate in a punching mode; then, according to the pre-design, the peripheral area of one or more bridge piece holes 20a is divided; and then two adjacent divided regions are punched by two dies with opposite punching directions, so that the two divided regions protrude out of the substrate 10 to form the bridge piece 20.
In some embodiments, after the lug holes 20a are punched and formed during the process, the mounting holes 10a for the heat exchange pipe 30 to pass through may be cut or punched and formed.
In some embodiments, the metal sheet is continuously bent back and forth after the formation of the bridge piece 20 during the machining process.
In an embodiment of the present invention, the heat exchanger has a flow heat exchange Performance that is compared with the heat exchanger having the same size but without the shim holes 20a in the related art, and referring to fig. 9, the ordinate is PEC (Performance Evaluation Criterion), which is (Nu ═ PEC (Performance Evaluation Criterion, comprehensive heat exchange Performance Evaluation factor)Is provided with/NuIs free of)/(fIs provided with/fIs free of) Wherein, NuIs provided withNu number of heat exchangers provided with a bridge piece aperture 20aIs free ofKnoop number, f, for a heat exchanger without a bridge piece aperture 20aIs provided withCoefficient of friction for heat exchanger provided with bridge piece holes 20a, fIs free ofThe friction coefficient of the heat exchanger without the bridge piece holes 20 a; the abscissa is Re (Reynolds number) within the range of Re from 400 to 1600Compared with a heat exchanger without the bridge piece holes 20a, the heat exchange effect of the heat exchanger is improved by at least 1.5%.
The embodiment of the invention also provides a heat pump system, which comprises a compressor, a condenser and an evaporator, wherein the condenser and/or the evaporator adopt any one of the heat exchangers in the previous embodiments. The compressor can make fluid heat transfer medium flow, and fluid heat transfer medium constantly passes in the heat exchanger in condenser and/or evaporimeter to realize carrying out the circulation heat transfer to fluid heat transfer medium.
The embodiment of the invention also provides electric equipment which comprises the heat pump system in the embodiment. The electrical equipment can be heat pump clothes dryers, air conditioners, refrigerators and other equipment.
The various embodiments/implementations provided herein may be combined with each other without contradiction.
The above description is only a preferred embodiment of the present application and is not intended to limit the present application, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims (15)

1. A heat exchanger fin, characterized in that the heat exchanger fin comprises:
a substrate (10);
the heat exchanger comprises a substrate (10), a plurality of bridge pieces (20) arranged on the substrate and used for cutting heat exchange air flow, wherein the bridge pieces (20) are provided with bridge piece holes (20a) penetrating through the bridge pieces (20) in the thickness direction.
2. The heat exchanger fin according to claim 1, wherein a plurality of the bridge pieces (20) are stamped from the base sheet (10).
3. The heat exchanger fin according to claim 1, wherein the equivalent diameter of the shim holes (20a) is not more than one-half of the dimension of the shims (20) in the direction of flow of the heat exchange gas stream.
4. The heat exchanger fin according to claim 1, wherein two adjacent bridges (20) are protrudingly provided on opposite sides of the base sheet (10) in a flow direction of the heat exchange gas flow.
5. The heat exchanger fin according to claim 1, wherein an equivalent diameter of the upstream shim holes (20a) is not smaller than an equivalent diameter of the downstream shim holes (20a) in a flow direction of the heat exchange gas flow.
6. The heat exchanger fin according to claim 1, wherein all the fins (20) of the heat exchanger fin are divided into a plurality of fin groups, equivalent diameters of the fin holes (20a) in each fin group are the same, the fin groups are sequentially arranged along a flow direction of a heat exchange gas flow, and in two adjacent fin groups, the equivalent diameter of the fin hole (20a) in the downstream fin group is 0.7-0.8 of the equivalent diameter of the fin hole (20a) in the upstream fin group.
7. The heat exchanger fin according to any one of claims 1 to 6, wherein the bridge pieces (20) of the heat exchanger fin are arranged along a same straight line in a projection of a plane in which the base sheet (10) is located.
8. The heat exchanger fin according to any one of claims 1 to 6, wherein the substrate (10) is provided with a plurality of mounting holes (10a) for passing heat exchange tubes (30), the mounting holes (10a) penetrating the substrate (10) in a thickness direction of the substrate (10).
9. The heat exchanger fin according to claim 8, wherein at least one of the bridge pieces (20) is disposed between adjacent two of the mounting holes (10 a).
10. A heat exchanger, characterized in that it comprises a plurality of heat exchanger fins as claimed in any one of claims 1 to 6 and a heat exchange tube (30), the heat exchange tube (30) being in heat conducting contact with the substrate (10); a plurality of the heat exchanger fins are stacked, an airflow channel (40) is formed between the base plates (10) of two adjacent heat exchanger fins, and at least part of the bridge plate (20) extends into the airflow channel (40).
11. The heat exchanger according to claim 10, wherein the heat exchange tube (30) comprises a heat conductive flat plate (31), and each of the heat exchanger fins is in contact with a surface of the heat conductive flat plate (31).
12. The heat exchanger of claim 11, wherein each of the heat exchanger fins is configured to: is formed by continuously bending a metal plate back and forth.
13. The heat exchanger according to claim 10, wherein the substrate (10) is provided with mounting holes (10a) penetrating the substrate (10) in a thickness direction of the substrate (10), and the heat exchange tubes (30) are inserted into the mounting holes (10a) of the respective substrates (10).
14. A heat pump system comprising a compressor, a condenser and an evaporator, the condenser and/or the evaporator employing the heat exchanger of any one of claims 10-13.
15. An electrical apparatus, characterized in that it comprises a heat pump system according to claim 14.
CN202110863372.7A 2021-07-29 2021-07-29 Heat exchanger fin, heat exchanger, heat pump system and electrical equipment Pending CN113624062A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202110863372.7A CN113624062A (en) 2021-07-29 2021-07-29 Heat exchanger fin, heat exchanger, heat pump system and electrical equipment

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202110863372.7A CN113624062A (en) 2021-07-29 2021-07-29 Heat exchanger fin, heat exchanger, heat pump system and electrical equipment

Publications (1)

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CN113624062A true CN113624062A (en) 2021-11-09

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Country Link
CN (1) CN113624062A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201417108Y (en) * 2009-06-25 2010-03-03 山西汾西热能工程有限公司 Air cooler fin
CN102087079A (en) * 2011-02-23 2011-06-08 浙江工业大学 Radial type reinforced heat exchange fin
CN102889812A (en) * 2012-09-20 2013-01-23 华电重工股份有限公司 Novel single-row tube bank for cooling air
CN202770296U (en) * 2012-09-20 2013-03-06 华电重工股份有限公司 Finned tube with turbulent flow boards
CN107388874A (en) * 2017-08-10 2017-11-24 海信科龙电器股份有限公司 A kind of heat exchange fin and finned heat exchanger
CN108562176A (en) * 2018-05-18 2018-09-21 广东美的制冷设备有限公司 Heat exchanger and heat transmission equipment
CN110726322A (en) * 2019-11-19 2020-01-24 广东美的暖通设备有限公司 Cooling fin for heat exchanger, cooling assembly and refrigeration equipment
CN111623660A (en) * 2020-04-26 2020-09-04 珠海格力电器股份有限公司 Bridge type heat exchanger fin, heat exchanger and air conditioner

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN201417108Y (en) * 2009-06-25 2010-03-03 山西汾西热能工程有限公司 Air cooler fin
CN102087079A (en) * 2011-02-23 2011-06-08 浙江工业大学 Radial type reinforced heat exchange fin
CN102889812A (en) * 2012-09-20 2013-01-23 华电重工股份有限公司 Novel single-row tube bank for cooling air
CN202770296U (en) * 2012-09-20 2013-03-06 华电重工股份有限公司 Finned tube with turbulent flow boards
CN107388874A (en) * 2017-08-10 2017-11-24 海信科龙电器股份有限公司 A kind of heat exchange fin and finned heat exchanger
CN108562176A (en) * 2018-05-18 2018-09-21 广东美的制冷设备有限公司 Heat exchanger and heat transmission equipment
CN110726322A (en) * 2019-11-19 2020-01-24 广东美的暖通设备有限公司 Cooling fin for heat exchanger, cooling assembly and refrigeration equipment
CN111623660A (en) * 2020-04-26 2020-09-04 珠海格力电器股份有限公司 Bridge type heat exchanger fin, heat exchanger and air conditioner

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