CN111595192A - Heat exchanger and air conditioner - Google Patents

Heat exchanger and air conditioner Download PDF

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Publication number
CN111595192A
CN111595192A CN202010450534.XA CN202010450534A CN111595192A CN 111595192 A CN111595192 A CN 111595192A CN 202010450534 A CN202010450534 A CN 202010450534A CN 111595192 A CN111595192 A CN 111595192A
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China
Prior art keywords
heat exchanger
heat
heat exchange
fins
micro
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Pending
Application number
CN202010450534.XA
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Chinese (zh)
Inventor
李成恩
陈枫
杜顺开
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GD Midea Air Conditioning Equipment Co Ltd
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GD Midea Air Conditioning Equipment Co Ltd
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Priority to CN202010450534.XA priority Critical patent/CN111595192A/en
Publication of CN111595192A publication Critical patent/CN111595192A/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
    • F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/30—Arrangement or mounting of heat-exchangers
    • 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
    • F28F1/10—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
    • F28F1/14—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 longitudinally
    • F28F1/22—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 longitudinally the means having portions engaging further tubular elements
    • 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)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Thermal Sciences (AREA)
  • Geometry (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)

Abstract

The invention discloses a heat exchanger and an air conditioner, wherein the heat exchanger comprises at least one heat exchange unit, and the heat exchange unit comprises: the heat exchange device comprises a micro-channel core body and heat dissipation fins, wherein the micro-channel core body is provided with a plurality of medium channels for heat exchange media to flow, the heat dissipation fins are arranged on two opposite sides of the micro-channel core body in the thickness direction, and the micro-channel core body and the heat dissipation fins are integrally formed. According to the heat exchanger provided by the embodiment of the invention, the heat exchange unit of the heat exchanger comprises the radiating fins and the micro-channel core body, and the micro-channel core body and the radiating fins are integrally formed, so that zero contact thermal resistance is realized between the radiating fins and the micro-channel core body, the heat exchange efficiency and the heat exchange effect of the radiating fins and the micro-channel core body can be improved, the heat exchange efficiency of the heat exchanger is higher, the heat exchange effect is better, and the heating efficiency and/or the refrigerating efficiency of the whole machine can be improved. When the heat exchanger is used for the whole machine, the heat exchanger can be without a fan, no wind or zero wind is realized, and the comfort is greatly improved.

Description

Heat exchanger and air conditioner
Technical Field
The invention relates to the technical field of heat exchange, in particular to a heat exchanger and an air conditioner.
Background
In the related technology, in the finned tube heat exchanger of mass production, the tubes and the fins of the finned tube heat exchanger are combined together through tube expansion, the thermal contact resistance between the tubes and the fins is large, and the heat exchange efficiency of the fins and the tubes is low, so that the heat exchange efficiency of the whole heat exchanger is low, the heat exchange effect is poor, and the improvement of the heating efficiency and/or the refrigeration efficiency of the whole heat exchanger is not facilitated.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, one object of the present invention is to provide a heat exchanger, in which the heat-dissipating fins and the microchannel core of the heat exchanger realize zero contact thermal resistance, so that the heat exchange efficiency and the heat exchange effect of the heat-dissipating fins and the microchannel core can be improved, and further, the heat exchange efficiency of the heat exchanger is higher and the heat exchange effect is better, which is beneficial to improving the heating efficiency and/or the cooling efficiency of the whole machine.
The invention also provides an air conditioner with the heat exchanger.
A heat exchanger according to an embodiment of the first aspect of the invention comprises at least one heat exchange unit comprising: the micro-channel core is provided with a plurality of medium channels for flowing heat exchange media; the radiating fins are arranged on two opposite sides of the micro-channel core body in the thickness direction, and the micro-channel core body and the radiating fins are integrally formed.
According to the heat exchanger provided by the embodiment of the invention, the heat exchanger is arranged to comprise at least one heat exchange unit, the heat exchange unit comprises the radiating fins and the micro-channel core body, and the micro-channel core body and the radiating fins are integrally formed, so that the radiating fins and the micro-channel core body realize zero contact thermal resistance, the heat exchange efficiency and the heat exchange effect of the radiating fins and the micro-channel core body can be improved, the heat exchange efficiency of the heat exchanger is higher, the heat exchange effect is better, and the heating efficiency and/or the refrigerating efficiency of the whole machine can be improved. When the heat exchanger is used for the whole machine, the heat exchanger can be without a fan, no wind or zero wind is realized, and the comfort is greatly improved.
According to some embodiments of the present invention, the heat exchange unit is a plurality of heat exchange units, the heat exchange units are arranged side by side, and adjacent heat exchange units are connected by welding or by using a heat conducting glue.
According to some embodiments of the present invention, the plurality of heat dissipation fins located on the same side in the thickness direction of the microchannel core are arranged side by side at intervals, the extending direction of the heat dissipation fins is parallel to or forms an included angle with the extending direction of the medium channel, and the included angle ranges from 75 ° to 105 °.
According to some embodiments of the invention, the heat dissipating fin extends in a straight line or a curved line in a direction from one end of the heat dissipating fin adjacent to the microchannel core to the other end of the heat dissipating fin remote from the microchannel core.
According to some embodiments of the invention, the fins have a height in the range of 8mm to 15 mm.
According to some embodiments of the invention, the heat dissipating fins have a thickness in the range of 0.1mm to 0.2 mm.
According to some embodiments of the invention, a radiation absorbing layer is provided on the heat dissipating fin.
According to some alternative embodiments of the invention, the radiation absorbing layer is a black graphene layer.
According to some embodiments of the present invention, the microchannel core is shaped like a flat plate, a plurality of the medium channels are defined in the microchannel core and are arranged side by side and at intervals along a first direction, the heat exchanger includes two collecting pipes, the two collecting pipes are arranged on two opposite sides of the microchannel core along a second direction, opposite ends of each of the medium channels in a length direction are open and are communicated with the collecting pipes, the first direction is perpendicular to a thickness direction of the microchannel core, and the second direction is perpendicular to the first direction and perpendicular to the thickness direction of the microchannel core.
According to some alternative embodiments of the present invention, each of the headers has a first mounting opening formed therein, the first mounting opening extends along a length direction of the header, and two opposite ends of the microchannel core along the second direction are respectively received and fitted in the first mounting openings of the two headers.
According to some optional embodiments of the present invention, the heat exchanger further includes a flow dividing hole-separating sheet, the flow dividing hole-separating sheet is disposed in the header pipe to divide an inner cavity of the header pipe along a length direction of the header pipe, a clamping opening is formed on the flow dividing hole-separating sheet, and two opposite ends of the microchannel core body along the second direction are clamped in the clamping opening.
Furthermore, a second mounting hole is formed in the collecting pipe at a position corresponding to the shunting partition hole piece, the second mounting hole extends along the circumferential direction of the collecting pipe, and the edge part of the shunting partition hole piece is accommodated and matched with the second mounting hole and connected with the collecting pipe.
Optionally, a positioning lug is formed on the shunting partition hole piece, and the positioning lug is abutted and connected with the side wall of the second mounting opening in the circumferential direction.
An air conditioner according to an embodiment of a second aspect of the present invention includes: a heat exchanger according to an embodiment of the above first aspect of the invention.
According to the air conditioner provided by the embodiment of the invention, the heat exchanger is arranged, so that the heat exchange efficiency is higher, the heat exchange effect is better, and the heating efficiency and/or the refrigerating efficiency of the whole machine can be improved; the heat exchanger can be without a fan, so that no wind or zero wind is realized, and the comfort is greatly improved.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of the overall construction of a heat exchanger according to some embodiments of the invention;
FIG. 2 is an exploded schematic view of the heat exchanger of FIG. 1;
FIG. 3 is a schematic diagram of the heat exchange unit of FIG. 2;
FIG. 4 is an enlarged schematic view at A in FIG. 3;
FIG. 5 is a schematic view of the header of FIG. 1;
FIG. 6 is another angle schematic of the header of FIG. 1;
FIG. 7 is an enlarged schematic view at B in FIG. 6;
FIG. 8 is a first schematic view of the shunt spacer of FIG. 6, wherein the shunt spacer has communication holes formed therein;
FIG. 9 is a second schematic view of the splitter plate of FIG. 6;
FIG. 10 is a graph of temperature rise test data for heat exchanger testing according to some embodiments of the invention;
FIG. 11 is a graph of temperature drop test data for heat exchanger testing according to some embodiments of the present invention.
Reference numerals:
a heat exchanger 100;
a heat exchange unit 1; a microchannel core 11; a medium passage 111; heat radiating fins 12;
a collecting pipe 2; a first mounting opening 21; a second mounting opening 22; an input pipe 23; an output pipe 24;
a flow dividing and hole separating sheet 3; a clamping opening 31; a positioning lug 32; a communication hole 33.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
The heat exchanger 100 according to an embodiment of the present invention is described below with reference to the accompanying drawings.
Referring to fig. 1 and 2, a heat exchanger 100 according to an embodiment of the first aspect of the present invention includes at least one heat exchange unit 1, where the heat exchange unit 1 includes: a microchannel core 11 and heat sink fins 12.
The microchannel core 11 has a plurality of medium channels 111 through which a heat exchange medium can flow, and the heat exchange medium can flow in the plurality of medium channels 111 at the same time. The microchannel core body 11 is not easy to leak heat exchange media, the filling amount is small, and the reliability is more guaranteed. The radiating fins 12 are provided on opposite sides in the thickness direction of the microchannel core 11, and the microchannel core 11 and the radiating fins 12 are integrally formed. In the process that the heat exchange medium flows through the heat exchanger 100, the heat exchange medium exchanges heat with the microchannel core 11, and the microchannel core 11 exchanges heat with the outside air through the heat dissipation fins 12, so that the adjustment of the ambient temperature can be realized.
Because the microchannel core body 11 is provided with the plurality of medium channels 111 for the heat exchange medium to flow, the heat exchange medium can flow in the plurality of medium channels 111 simultaneously, so that the heat exchange is more uniform, and the heat exchange efficiency is higher; the radiating fins 12 are arranged on two opposite sides of the micro-channel core body 11 in the thickness direction, and the micro-channel core body 11 and the radiating fins 12 are integrally formed, so that the radiating fins 12 and the micro-channel core body 11 realize a high-efficiency heat exchange mode with zero contact thermal resistance.
When the heat exchanger 100 works, a heat exchange medium flows in the microchannel core 11, the heat exchange medium exchanges heat with the microchannel core 11, the microchannel core 11 exchanges heat with external air through the radiating fins 12, and the microchannel core 11 and the radiating fins 12 realize a high-efficiency heat exchange mode with zero contact thermal resistance, so that the microchannel core 11 and the radiating fins 12 realize sufficient heat exchange and high heat exchange efficiency. The heat dissipation fins 12 exchange heat with external air, and the heat dissipation fins 12 on the two sides can transfer heat or cold to the surrounding air through radiation heat transfer and natural convection, so that the surrounding environment temperature can be adjusted. And further, the heat exchanger 100 has high heat exchange efficiency and good heat exchange effect, and is beneficial to improving the heating efficiency and/or the refrigerating efficiency of the whole machine.
In addition, according to the classical formula of radiative heat transfer, Stefan-Boltzmann law:
Q＝Aσ(T4 A-T4 B)
the specific meanings of the parameters in the above formula are as follows:
q is the amount of heat exchange;
a-heat exchange area;
t is the absolute temperature (K) of the object, the absolute temperatures of the two objects A and B;
sigma-StefanBoltzmann constant, σ 5.67 × 10-8W/(m2·K4)；
The surface emissivity, whose value is between 0 and 1, is determined by the surface properties of the object, and in the case of absolute blackbodies, 1.
Factors that influence the surface emissivity are the type of substance, the surface temperature and the surface roughness. The emissivity of different substances is different, and the emissivity of the same metal material, which is rough or oxidized, is several times that of a highly polished metal material.
Specifically, according to the heat exchanger 100 of the embodiment of the present invention, the heat exchange amount Q in the formula is the heat exchange amount of the radiation heat transfer of the heat exchanger 100; a is the heat exchange area of the air side of the heat exchange unit 1; t represents the absolute temperature of the heat exchanger 100 and the environment surrounding the heat exchanger 100, and T represents the absolute temperature of the heat exchanger 100 when the heat exchanger 100 is operating as an evaporatorAIs the temperature T of the environment surrounding the heat exchanger 100BFor the temperature of the heat exchanger 100, T is the temperature of the heat exchanger 100 when the heat exchanger 100 is acting as a condenserBIs the temperature T of the environment surrounding the heat exchanger 100AIs the temperature of the heat exchanger 100; factors that affect the surface emissivity include the type of material on the surface of the heat exchanger 100, the surface temperature, the surface roughness, and the like.
As can be seen from the above formula, the larger the heat exchange area a of the heat exchanger 100 is, the larger the radiation heat exchange amount Q between the heat exchanger 100 and the surrounding environment is. The heat exchange area of the heat exchanger 100 of the present application is large, so the heat exchanger 100 and the radiation heat exchange amount of the surrounding environment are large, and the heat exchange efficiency of the heat exchanger 100 is high.
The amount of radiant heat exchange Q of the heat exchanger 100 with the ambient environment may also be increased by increasing the value of the surface emissivity.
For example, in some embodiments of the present invention, the heat sink fins 12 are provided with a radiation absorbing layer. Since the radiation absorbing layer is sprayed on the heat dissipating fins 12, the value of the surface radiation coefficient can be increased, and the radiation and absorption efficiency of the surface of the heat exchanger 100 can be increased, so that the heat exchange efficiency of the heat exchanger 100 can be effectively improved. When the heat exchanger 100 is used as an evaporator, the heat exchanger 100 absorbs heat from the surrounding environment, and the radiation absorption layer enhances the absorption efficiency; when the heat exchanger 100 is used as a condenser, the heat exchanger 100 radiates heat to the surrounding environment, and the radiation absorbing layer enhances the radiation efficiency.
Alternatively, the radiation absorbing layer may be a black graphene layer. The black graphene layer is black and has good heat conduction performance, and the surface radiation coefficient of the heat exchanger 100 can be greatly improved, so that the heat exchange efficiency is enhanced, the heat exchange efficiency is higher, and the heat exchange effect is better.
Because the heat exchange efficiency of the heat exchanger 100 is high and the heat exchange effect is good, the heat exchanger 100 can be used for the whole machine without a fan, no wind or zero wind is realized, and the comfort is greatly improved.
Of course, when the heat exchanger 100 is used in a complete machine, in order to further enhance the convection between the heat exchanger 100 and the ambient air, the heat exchanger 100 may also be provided with a fan, and the fan drives the airflow to flow rapidly so as to exchange heat with the heat exchanger 100 rapidly.
According to the heat exchanger 100 of the embodiment of the invention, the heat exchanger 100 is arranged to include at least one heat exchange unit 1, the heat exchange unit 1 includes the heat dissipation fins 12 and the microchannel core 11, and the microchannel core 11 and the heat dissipation fins 12 are integrally formed, so that zero contact thermal resistance is realized between the heat dissipation fins 12 and the microchannel core 11, and thus the heat exchange efficiency and the heat exchange effect of the heat dissipation fins 12 and the microchannel core 11 can be improved, and further the heat exchanger 100 has high heat exchange efficiency and good heat exchange effect, and is beneficial to improving the heating efficiency and/or the refrigerating efficiency of the whole machine. When the heat exchanger 100 is used for the whole machine, the heat exchanger 100 can be free of a fan, no wind or zero wind is realized, and the comfort is greatly improved.
Referring to fig. 1 and 2, according to some embodiments of the present invention, a plurality of heat exchange units 1 are provided, a plurality of heat exchange units 1 are arranged side by side, and adjacent heat exchange units 1 are connected by a heat conductive adhesive. Because heat exchange unit 1 has a plurality ofly and sets up side by side, can set up heat exchange unit 1's quantity according to the heat transfer volume of difference for heat transfer area is bigger, and heat exchange efficiency is higher. The adjacent heat exchange units 1 are connected through the heat-conducting glue, so that the heat exchange units 1 can be conveniently connected and fixed to form a whole, the connection fixing mode is simple and reliable, quick heat conduction can be realized among the heat exchange units 1 through the heat-conducting glue, and the heat exchange efficiency of the heat exchanger 100 is further improved.
In the description of the present invention, "a plurality" means two or more.
Referring to fig. 1 to 3, according to some embodiments of the present invention, the plurality of heat dissipation fins 12 located on the same side of the microchannel core 11 in the thickness direction are arranged side by side and at intervals, so that the heat exchanger 100 has a larger heat exchange area, more uniform heat exchange, and higher heat exchange efficiency. When the heat exchanger 100 is used for the whole machine, the placing direction of the heat exchanger 100 can use the extending direction of the radiating fins 12 as a reference, and the extending direction of the radiating fins 12 can be along the vertical direction, so that when the heat exchanger 100 is used as an evaporator, the condensed water generated on the heat exchanger 100 can flow downwards under the flow guiding effect of the radiating fins 12, the discharge of the condensed water is facilitated, and the discharge of the condensed water is smooth. The extending direction of the heat dissipation fins 12 is parallel to or forms an included angle with the extending direction of the medium channel 111, and the included angle ranges from 75 degrees to 105 degrees. When the extending direction of the heat dissipation fins 12 is parallel to the extending direction of the medium channel 111, the shape of the heat exchanger 100 is more flexible and changeable, so that the heat exchanger 100 can be suitable for different overall structures, for example, the heat exchanger 100 can be a flat plate shape, and can also be bent to form different shapes, such as an L shape, a U shape, and the like. As shown in fig. 1, when the extending direction of the heat dissipating fin 12 and the extending direction of the medium channel 111 form an included angle, and the included angle ranges from 75 ° to 105 °, for example, the extending direction of the heat dissipating fin 12 and the extending direction of the medium channel 111 form an included angle of 80 °, so that the extending direction of the heat dissipating fin 12 and the extending direction of the microchannel core 11 forming the medium channel 111 form a larger angle, and the overall structural strength of the heat exchanger 100 is more stable, uniform, and reliable.
Referring to fig. 1-3, according to some embodiments of the present invention, the heat radiating fins 12 extend in a straight line or a curved line in a direction from one end of the heat radiating fin 12 adjacent to the microchannel core 11 to the other end of the heat radiating fin 12 remote from the microchannel core 11. For example, the heat dissipation fins 12 may extend linearly to form plane fins, or extend in a curved shape to form arc-shaped fins or corrugated fins, so as to form heat exchange areas with different sizes, so that a user can select the heat exchange areas according to different heat exchange amounts. And, under the condition that the height of the radiating fins 12 is the same, the heat exchange area of the radiating fins 12 extending in a curve is larger than the heat exchange area extending in a straight line, specifically, the heat exchange area of the corrugated fins is larger than the heat exchange area of the cambered surface fins is larger than the heat exchange area of the planar fins.
Referring to fig. 3, according to some embodiments of the present invention, the height h of the heat dissipating fins 12 ranges from 8mm to 15 mm. The height of the radiating fins 12 is too low, so that the overall heat exchange area of the heat exchange unit 1 can be reduced under the condition of the same size of the microchannel core 11, and the heat exchange efficiency is influenced; if the height of the heat dissipation fins 12 is too high, the overall strength of the heat exchange unit 1 is reduced, and the stability of heat dissipation is affected. Therefore, by setting the height h of the heat dissipation fin 12 within the above range, the heat exchanger 100 has a large heat exchange area, and the volume of the heat exchanger 100 is relatively small, thereby reducing the occupied space.
According to some embodiments of the present invention, the thickness d of the heat dissipating fins 12 ranges from 0.1mm to 0.2 mm. The excessively small thickness of the heat radiating fins 12 has high requirements on the molding process of the heat exchange unit 1, the difficulty coefficient is high, and the structural strength of the heat radiating fins 12 is insufficient; and the thickness of the heat dissipation fins 12 is too large, so that the whole heat exchange area of the heat exchange unit 1 can be reduced under the condition of the micro-channel core body 11 with the same size, and heat exchange is not facilitated. Therefore, the thickness d of the fins 12 is set in the range, the heat exchange area of the heat exchange unit 1 is increased as much as possible, the machining and forming difficulty of the heat exchange unit 1 is low, the structural strength of the radiating fins 12 is guaranteed, and the radiating fins 12 are not easy to break.
Referring to fig. 1 and 2, according to some embodiments of the present invention, the microchannel core 11 is in a flat plate shape, the microchannel core 11 defines a plurality of medium channels 111 arranged side by side and at intervals in a first direction, and the heat exchanger 100 includes two headers 2, the two headers 2 are arranged on two opposite sides of the microchannel core 11 in a second direction, the first direction is perpendicular to a thickness direction of the microchannel core 11, and the second direction is perpendicular to the first direction and perpendicular to the thickness direction of the microchannel core 11. The collecting pipes 2 are also provided with an input pipe 23 and an output pipe 24, the input pipe 23 and the output pipe 24 can be arranged on one collecting pipe 2, and the input pipe 23 and the output pipe 24 are both communicated with the collecting pipe 2; alternatively, the inlet pipe 23 is provided on one of the headers 2 and communicates with the header 2, and the outlet pipe 24 is provided on the other header 2 and communicates with the header 2. The heat exchange medium flows in the plurality of medium channels 111 arranged side by side and at intervals along the first direction of the microchannel core 11 for heat exchange, opposite ends of each medium channel 111 in the length direction are open and communicated with the collecting pipe 2, the heat exchange medium, such as a refrigerant, flows into the collecting pipe 2 from the input pipe 23, flows into the plurality of medium channels 111 of the microchannel core 11, finally is converged into the collecting pipe 2, and flows out of the heat exchanger 100 through the output pipe 24.
Referring to fig. 5, according to some alternative embodiments of the present invention, each header 2 is formed with a first mounting opening 21, the first mounting opening 21 extends along the length direction of the header 2, and two opposite ends of the microchannel core 11 along the second direction are respectively accommodated and fitted in the first mounting openings 21 of the two headers 2, so that the structure is simple and the installation is convenient.
The relationship between the length L of the first mounting port 21, the number n of the heat exchange units 1 and the width D of the single microchannel core body 11 satisfies the following conditions: l ═ n × D.
Referring to fig. 6, according to some alternative embodiments of the present invention, the heat exchanger 100 further includes a dividing partition sheet 3, the dividing partition sheet 3 is disposed in the header 2 to divide the inner cavity of the header 2 along the length direction of the header 2, the dividing partition sheet 3 is formed with a clamping opening 31, and two opposite ends of the microchannel core 11 along the second direction are clamped in the clamping opening 31. Because be equipped with reposition of redundant personnel in the pressure manifold 2 and separate hole piece 3, can separate the inner chamber of pressure manifold 2 along the length direction of pressure manifold 2, and reposition of redundant personnel separates hole piece 3 and can realize the more careful reposition of redundant personnel to the heat transfer medium, improves the homogeneity of the whole heat transfer of heat exchanger 100 from this.
When the split spacer 3 is provided with the clamping opening 31, the width of the clamping opening 31 may be substantially equal to the thickness of the microchannel core 11, two opposite ends of the microchannel core 11 in the second direction are clamped in the clamping opening 31, and two ends of the microchannel core 11 are in close contact with the inner wall of the clamping opening 31.
Referring to fig. 7, further, a second mounting hole 22 is formed in the position, corresponding to the shunting partition piece 3, of the header pipe 2, so that the shunting partition piece 3 can be conveniently mounted, the second mounting hole 22 extends along the circumferential direction of the header pipe 2, the edge portion of the shunting partition piece 3 is accommodated and matched with the second mounting hole 22 and is connected with the header pipe 2, and the shunting partition piece 3 can be mounted in the header pipe 2 through the second mounting hole 22, so that the shunting partition piece 3 is convenient to mount, for example, the edge portion of the shunting partition piece 3 is welded to the inner wall of the second mounting hole 22, so that the shunting partition piece 3 is fixed on the header pipe 2.
Referring to fig. 8 and 9, optionally, a positioning lug 32 is formed on the flow dividing hole sheet 3, and the positioning lug 32 abuts against and is connected to a circumferential side wall of the second mounting opening 22, for example, the positioning lug 32 is welded to the circumferential side wall of the second mounting opening 22, so that the mounting and positioning of the flow dividing hole sheet 3 are facilitated, and the connection of the flow dividing hole sheet 3 and the header 2 is further fastened.
Referring to fig. 8 and 9, the shunting and separating sheet 3 is divided into two types, namely a perforated type and a non-perforated type, and the non-perforated shunting and separating sheet 3 completely separates the inner cavity of the collecting pipe 2 into different parts (refer to fig. 9); the perforated dividing sheet 3 divides the inner cavity of the header 2 into different portions that can be connected (see fig. 8), for example, a connecting hole 33 is formed in the middle of the dividing sheet 3, and the connecting hole 33 can connect the different portions of the inner cavity of the header 2 divided by the dividing sheet 3.
Referring to fig. 1, 2, 5 and 6, the header 2 is provided with an input pipe 23 and an output pipe 24, the number of the division hole-separating sheets 3 in the header 2 provided with the input pipe 23 is N2, the number of the division hole-separating sheets 3 in the header 2 provided with the input pipe 23 is N1, N1 and N2 are determined by calculation according to the area of the heat exchanger 100 and the flow rate of the heat exchange medium, the number of the division hole-separating sheets 3 in each header 2 is not less than 2, and generally N1 is greater than N2.
An air conditioner according to an embodiment of a second aspect of the present invention includes: the heat exchanger 100 according to the above-described embodiment of the first aspect of the invention.
Alternatively, the air conditioner may be a split wall-mounted air conditioner, a split floor type air conditioner, or a mobile air conditioner. The heat exchanger 100 can be used as a component of an air conditioner for exchanging heat with indoor air, and when the air conditioner refrigerates, the heat exchanger 100 is used as an evaporator; the heat exchanger 100 is used as a condenser when the air conditioner is heating.
When the air conditioner is a split wall-mounted air conditioner or a split floor type air conditioner, the heat exchanger 100 can be used as an indoor heat exchanger of an indoor unit of the air conditioner, because the heat exchanger 100 has high heat exchange efficiency and good heat exchange effect, when the heat exchanger 100 is used for the whole air conditioner, a fan can be omitted, the absence of wind or zero wind can be realized, the comfort is greatly improved, the number of parts of the indoor unit of the air conditioner can be reduced, the volume of the indoor unit of the air conditioner can be reduced, and the occupied space of the indoor unit of the air conditioner can be.
When the air conditioner is the portable air conditioner, this heat exchanger 100 can regard as the part of air conditioner with the heat transfer of indoor air, because heat exchange efficiency of heat exchanger 100 is high and the heat transfer is effectual, when heat exchanger 100 is used for the complete machine, can not take the fan, realize windless or zero wind, very big improvement the travelling comfort to can reduce the spare part quantity of air conditioner, thereby can reduce the volume of air conditioner, reduce the occupation space of air conditioner.
According to the air conditioner provided by the embodiment of the invention, by arranging the heat exchanger 100, the heat exchange efficiency is higher, the heat exchange effect is better, and the heating efficiency and/or the refrigerating efficiency of the whole machine can be improved; the heat exchanger 100 can be without a fan, so that no wind or zero wind is realized, and the comfort is greatly improved.
A heat exchanger 100 according to one embodiment of the present invention is described below with reference to fig. 1-6.
Referring to fig. 1 to 3, the heat exchanger 100 includes four heat exchange units 1, adjacent heat exchange units 1 are connected by a heat conductive adhesive, and each heat exchange unit 1 includes: a microchannel core 11 and heat sink fins 12. The microchannel core 11 has a plurality of medium channels 111 through which a heat exchange medium can flow, and the heat exchange medium can flow in the plurality of medium channels 111 at the same time. The radiating fins 12 are arranged on two opposite sides of the micro-channel core body 11 in the thickness direction, the fins on the two sides are symmetrically arranged at equal intervals, and the micro-channel core body 11 and the radiating fins 12 are integrally formed.
The plurality of heat dissipation fins 12 located on the same side in the thickness direction of the microchannel core 11 are arranged side by side and at intervals, and the extending direction of the heat dissipation fins 12 and the extending direction of the medium channel 111 form an included angle of 100 degrees. The heat dissipation fins 12 extend in a curved line in a direction from one end of the heat dissipation fin 12 adjacent to the microchannel core 11 to the other end of the heat dissipation fin 12 remote from the microchannel core 11.
Referring to fig. 4, the height h of the heat radiating fins 12 is 9mm, and the thickness d of the heat radiating fins 12 is 0.15 mm. The radiation absorbing layer is sprayed on the radiating fins 12 on one side, and the radiation absorbing layer is a black graphene layer.
Referring to fig. 1, 2 and 5, the heat exchanger 100 further includes two collecting pipes 2, the two collecting pipes 2 are disposed on two opposite sides of the microchannel core 11 along the second direction, and one of the collecting pipes 2 is provided with an input pipe 23 and an output pipe 24. The microchannel core 11 is flat, a plurality of medium channels 111 arranged side by side and at intervals along a first direction are defined in the microchannel core 11, opposite ends of each medium channel 111 in the length direction are open and communicated with the header 2, the first direction is perpendicular to the thickness direction of the microchannel core 11, and the second direction is perpendicular to the first direction and perpendicular to the thickness direction of the microchannel core 11. Be formed with first installing port 21 on every pressure manifold 2, first installing port 21 extends along the length direction of pressure manifold 2, and the cooperation is held respectively at two ends along the relative of second direction of microchannel core 11 in the first installing port 21 of two pressure manifolds 2, and the cooperation degree of depth that microchannel core 11 inserted pressure manifold 2 is controlled at 3mm-5mm, and the length L of first installing port 21 satisfies: L-4D, where D is the width of the single microchannel core 11.
Referring to fig. 6, 7, 8, and 9, the heat exchanger 100 further includes a dividing partition sheet 3, the dividing partition sheet 3 is disposed in the header 2 to divide the inner cavity of the header 2 along the length direction of the header 2, the dividing partition sheet 3 may be divided according to the number of the medium channels 111 in the microchannel core 11, and the finer dividing is realized by calculating the flow path difference compared with the number of the medium channels 111. The shunting hole separating sheet 3 is divided into two types of holes with holes and holes without holes.
Referring to fig. 7, 8 and 9, a second mounting opening 22 is formed in the header 2 at a position corresponding to the flow dividing hole partition piece 3, the second mounting opening 22 extends along the circumferential direction of the header 2, and the edge portion of the flow dividing hole partition piece 3 is accommodated and fitted in the second mounting opening 22 and connected to the header 2. The shunt hole partition sheet 3 is formed with a positioning lug 32, the positioning lug 32 abuts against and is connected to the side wall in the circumferential direction of the second mounting opening 22, and the positioning lug 32 is connected to the side wall 22 of the second mounting opening in the header 2 by welding.
When the heat exchanger 100 is used for a complete machine, the heat exchanger 100 is free of a fan, no wind or zero wind is realized, and the extending direction of the radiating fins 12 is kept along the up-down direction when the heat exchanger 100 is used.
The heat exchanger 100 in this example was tested under the conditions shown in table 1 below, in which the heat exchanger 100 was hung on a wall, and thus the temperature of the wall and the temperature of indoor air were used as the ambient temperature of the heat exchanger 100.
Table 1: temperature rise and drop test conditions
Temperature reduction Indoor at 36 ℃/60% Outdoor 43 ℃/60% Wall 34 deg.C
Temperature rise Indoor 0 ℃/100% Outdoor-5 ℃/60% Wall 4 deg.C
And (3) temperature reduction: the heat exchanger 100 was used as an evaporator, and at the beginning of the test, the indoor temperature was 36 ℃, the indoor humidity was 60%, the wall temperature was 34 ℃, the outdoor temperature was 43 ℃, and the outdoor humidity was 60%.
Temperature rise: the heat exchanger 100 was used as a condenser, and at the beginning of the test, the indoor temperature was 0 ℃, the indoor humidity was 100%, the wall temperature was 4 ℃, the outdoor temperature was-5 ℃, and the outdoor humidity was 60%.
Tables 2 and 3 below show the temperature rise test data and the temperature drop test data.
Table 2: temperature rise test data
Time/min Initial 20 40 60 80 100
Air temperature 5 8.78 10.46 11.38 11.52 11.67
Flat temperature of wall 4.97 6.28 6.94 7.46 7.51 7.63
Table 3: temperature drop test data
Time/min 0 20 40 60 80 100
Air temperature 36.12 31.45 30.39 29.76 29.23 29.21
Wall temperature 33.97 33.43 33.11 33.16 33.19 32.76
Referring to table 2 in conjunction with fig. 10, when the heat exchanger 100 is used as a condenser, the heat exchanger 100 starts to operate, and the temperature of the surface of the heat exchanger 100 is higher, and heat is exchanged with the ambient environment through heat radiation and convection, so that the indoor temperature is increased, and the temperature of the indoor air and the temperature of the wall corresponding to the heat exchanger 100 are both increased. In this test, the room air temperature and the wall temperature were recorded every 20min, and it can be seen from the test data and curves that the heat exchanger 100 provided by the present invention achieves a more significant increase in the room temperature in the first 40min, and the change in the room temperature becomes smaller and gradually levels in the subsequent time.
Referring to table 3 in conjunction with fig. 11, when the heat exchanger 100 is used as an evaporator, the heat exchanger 100 starts to operate, and the temperature of the surface of the heat exchanger 100 is low, and heat is exchanged with the ambient environment through heat radiation and convection, so that the indoor temperature is reduced, and the temperature of the indoor air and the temperature of the wall corresponding to the heat exchanger 100 are both reduced. In the test, the indoor air temperature and the wall temperature are recorded every 20min, and as can be seen from the test data and the curve, the heat exchanger 100 provided by the invention enables the indoor temperature to reach a more obvious reduction within the first 20min, and the change amplitude of the indoor temperature becomes smaller and gradually tends to be stable in the subsequent time.
It is thus shown that the heat exchanger 100 of the present invention can achieve a faster temperature increase or decrease and maintain the temperature.
In the description of the present invention, it is to be understood that the terms "length", "width", "thickness", "horizontal", "circumferential", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (14)

1. A heat exchanger comprising at least one heat exchange unit, the heat exchange unit comprising:
the micro-channel core is provided with a plurality of medium channels for flowing heat exchange media;
the radiating fins are arranged on two opposite sides of the micro-channel core body in the thickness direction, and the micro-channel core body and the radiating fins are integrally formed.
2. The heat exchanger according to claim 1, wherein the number of the heat exchange units is plural, the plural heat exchange units are arranged side by side, and adjacent heat exchange units are connected by welding or by a heat-conducting adhesive.
3. The heat exchanger according to claim 1, wherein the plurality of heat dissipation fins located on the same side in the thickness direction of the microchannel core are arranged side by side at intervals, the extending direction of the heat dissipation fins is parallel to or forms an included angle with the extending direction of the medium channel, and the included angle ranges from 75 ° to 105 °.
4. The heat exchanger of claim 1, wherein the heat sink fins extend in a straight line or a curved line in a direction from one end of the heat sink fins adjacent to the microchannel core to the other end of the heat sink fins remote from the microchannel core.
5. The heat exchanger of claim 1, wherein the fins have a height in the range of 8mm to 15 mm.
6. The heat exchanger of claim 1, wherein the fins have a thickness in the range of 0.1mm to 0.2 mm.
7. The heat exchanger of claim 1, wherein the heat sink fins have a radiation absorbing layer disposed thereon.
8. The heat exchanger of claim 7, wherein the radiation absorbing layer is a black graphene layer.
9. The heat exchanger according to any one of claims 1 to 8, wherein the microchannel core has a flat plate shape, the microchannel core defines therein a plurality of the medium channels arranged side by side and at intervals in a first direction, the heat exchanger includes two headers provided on opposite sides of the microchannel core in a second direction, opposite ends of each of the medium channels in a length direction are open and communicate with the headers, the first direction is perpendicular to a thickness direction of the microchannel core, and the second direction is perpendicular to the first direction and perpendicular to the thickness direction of the microchannel core.
10. The heat exchanger of claim 9, wherein each of said headers has a first mounting opening formed therein, said first mounting opening extending along a length of said header, opposite ends of said microchannel core in said second direction being received in said first mounting openings of said two headers, respectively.
11. The heat exchanger according to claim 10, comprising a flow dividing hole partition sheet, wherein the flow dividing hole partition sheet is disposed in the header pipe to partition an inner cavity of the header pipe along a length direction of the header pipe, a clamping opening is formed in the flow dividing hole partition sheet, and two opposite ends of the microchannel core body along the second direction are clamped in the clamping opening.
12. The heat exchanger according to claim 11, wherein a second mounting opening is formed in the header at a position corresponding to the dividing hole-separating piece, the second mounting opening extends along a circumferential direction of the header, and an edge portion of the dividing hole-separating piece is accommodated and fitted in the second mounting opening and connected to the header.
13. The heat exchanger of claim, wherein the flow dividing hole piece is formed with a positioning lug that abuts and is connected to a side wall in the circumferential direction of the second mounting port.
14. An air conditioner, comprising: the heat exchanger according to any one of claims 1 to 13.
CN202010450534.XA 2020-05-25 2020-05-25 Heat exchanger and air conditioner Pending CN111595192A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010450534.XA CN111595192A (en) 2020-05-25 2020-05-25 Heat exchanger and air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010450534.XA CN111595192A (en) 2020-05-25 2020-05-25 Heat exchanger and air conditioner

Publications (1)

Publication Number Publication Date
CN111595192A true CN111595192A (en) 2020-08-28

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010450534.XA Pending CN111595192A (en) 2020-05-25 2020-05-25 Heat exchanger and air conditioner

Country Status (1)

Country Link
CN (1) CN111595192A (en)

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