CN112146466A - Microchannel heat exchanger and air conditioner - Google Patents
Microchannel heat exchanger and air conditioner Download PDFInfo
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- CN112146466A CN112146466A CN202011001023.6A CN202011001023A CN112146466A CN 112146466 A CN112146466 A CN 112146466A CN 202011001023 A CN202011001023 A CN 202011001023A CN 112146466 A CN112146466 A CN 112146466A
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- pipe
- heat exchanger
- microchannel heat
- branch pipe
- gas collecting
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- 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
- F28D1/047—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 the conduits being bent, e.g. in a serpentine or zig-zag
- F28D1/0471—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 the conduits being bent, e.g. in a serpentine or zig-zag the conduits having a non-circular cross-section
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B39/00—Evaporators; Condensers
- F25B39/04—Condensers
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- 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
- F25B41/00—Fluid-circulation arrangements
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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
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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
- F28F9/26—Arrangements for connecting different sections of heat-exchange elements, e.g. of radiators
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Geometry (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
The application provides a microchannel heat exchanger and an air conditioner. This microchannel heat exchanger includes pressure manifold (1) and gas collecting pipe (2), be provided with a plurality of heat transfer flat pipe (3) between pressure manifold (1) and gas collecting pipe (2), the first end and pressure manifold (1) intercommunication of heat transfer flat pipe (3), the second end and the gas collecting pipe (2) intercommunication of heat transfer flat pipe (3), be provided with at least one spacer (4) on pressure manifold (1), spacer (4) separate pressure manifold (1) for two at least shunt tubes (5), every shunt tube (5) correspond respectively and are provided with at least one collection liquid branch pipe (6), be provided with two at least gas collection branch pipe (7) along axial interval on gas collecting pipe (2), shunt tube (5) and gas collection branch pipe (7) one-to-one intercommunication. According to the micro-channel heat exchanger, the flow distribution of the refrigerant can be more uniform, and the heat exchange efficiency of the heat exchanger is improved.
Description
Technical Field
The application relates to the technical field of air conditioning, in particular to a micro-channel heat exchanger and an air conditioner.
Background
In the prior art, a microchannel heat exchanger is composed of a plurality of flat tubes, fins connected between the flat tubes, and two collecting pipes connected to both ends of the flat tubes. The micro-channel flow heat exchanger has high heat exchange efficiency, compact structure and more advantages in cost than the common copper tube fin type heat exchanger, and has been widely applied to household and commercial air conditioners as a single-cooler condenser.
However, when the heat exchanger of such a structure is used as a condenser for a cooling and warming machine, the following problems arise: the gas-liquid two-phase refrigerant can generate a certain degree of gas-liquid stratification phenomenon under the influence of gravity, the gas refrigerant is easy to gather to the upper space of the collecting pipe, the liquid refrigerant is piled to the lower space of the collecting pipe, and the refrigerant in the collecting pipe is in the gas-liquid stratification phenomenon, so that the flow distribution of the refrigerant entering each flat pipe is uneven, and the heat exchange efficiency of the heat exchanger is reduced.
Disclosure of Invention
Therefore, the technical problem that this application will be solved lies in providing a microchannel heat exchanger and air conditioner, can make refrigerant flow distribution more even, improves heat exchanger heat exchange efficiency.
In order to solve the problem, the application provides a microchannel heat exchanger, including pressure manifold and collecting pipe, be provided with a plurality of heat transfer flat pipes between pressure manifold and the collecting pipe, the flat first end and the pressure manifold intercommunication of heat transfer, the flat second end and the gas collecting pipe intercommunication of heat transfer, be provided with at least one spacer on the pressure manifold, the spacer separates the pressure manifold for two at least shunt tubess, every shunt tubess corresponds respectively and is provided with at least one collection liquid branch pipe, be provided with two at least gas collecting branch pipes along axial interval on the gas collecting pipe, shunt tubess and gas collecting branch pipe one-to-one intercommunication.
Preferably, the vertical setting of pressure manifold, along the direction from top to bottom, the quantity of the flat pipe of heat transfer of shunt tubes intercommunication increases progressively.
Preferably, the collecting pipe is vertically arranged, the collecting branch pipe comprises a communicating hole and an injection hole, the injection hole is positioned in the collecting branch pipe, and the hole opening of the injection hole faces upwards.
Preferably, the liquid collecting branch pipe is provided with an external thread, the shunt pipe is provided with a threaded hole, and the liquid collecting branch pipe is screwed on the threaded hole through the external thread; or the liquid collecting branch pipe is welded and fixed on the shunt pipe.
Preferably, when the liquid collecting branch pipe rotates to the limit position, the hole openings of the injection holes face upwards.
Preferably, the injection hole is arranged on the connecting section of the liquid collecting branch pipe connecting section and the bending section, and the orifice directions of the injection hole in the bending direction of the bending section are the same.
Preferably, the microchannel heat exchanger further comprises a fixing frame, the fixing frame is mounted on the collecting pipe, and the liquid collecting branch pipe is fixed through the fixing frame.
Preferably, the liquid collecting branch pipe is provided with a positioning ring, the fixing frame is provided with a mounting hole and a positioning hole, the mounting hole is communicated with the positioning hole, the aperture of the mounting hole is larger than or equal to the diameter of the positioning ring, and the aperture of the positioning hole is smaller than the diameter of the positioning ring.
Preferably, the liquid collecting branch pipe is provided with a flow control valve.
Preferably, the collecting pipe is provided with a caulking groove along the radial direction, and the spacer is embedded into the caulking groove to separate the collecting pipe.
Preferably, the gas collecting pipes are vertically arranged, and the number of the heat exchange flat pipes between the adjacent gas collecting branch pipes is increased progressively along the direction from top to bottom.
Preferably, one end of the gas collecting branch pipe, which is far away from the gas collecting pipe, is provided with a flow guide pipe.
Preferably, the heat exchange flat tubes are provided with heat exchange fins.
According to another aspect of the present application, there is provided an air conditioner including the microchannel heat exchanger described above.
The utility model provides a microchannel heat exchanger, including pressure manifold and collecting pipe, be provided with a plurality of heat transfer flat pipes between pressure manifold and the collecting pipe, the first end and the pressure manifold intercommunication of heat transfer flat pipe, the second end and the gas collecting pipe intercommunication of heat transfer flat pipe, be provided with at least one spacer on the pressure manifold, the spacer separates the pressure manifold into two at least shunt tubess, every shunt tubess corresponds respectively and is provided with at least one collection liquid branch pipe, be provided with two at least gas collection branch pipes along axial interval on the gas collecting pipe, shunt tubess and gas collection branch pipe one-to-one intercommunication. The microchannel heat exchanger is segmented by the spacers to form a plurality of shunt tubes, each shunt tube is an independent space, so when a refrigerant enters the manifold from the liquid collecting branch tubes, the refrigerant entering the manifold from each liquid collecting branch tube cannot influence each other, flows from the corresponding heat exchange flat tube through the shunt tubes and exchanges heat, the problem that the refrigerant in a gas-liquid two-phase state is easy to generate gas-liquid stratification under the action of gravity to cause uneven refrigerant flow distribution is effectively solved, the microchannel heat exchanger shunts the gas collecting tube through the gas collecting branch tubes to enable the shunt tubes to be communicated with the gas collecting branch tubes in a one-to-one correspondence manner, the heat exchange flat tubes corresponding to each shunt tube simultaneously correspond to one gas collecting branch tube, and therefore, no matter the microchannel heat exchanger is used for refrigerating or refrigerating, the refrigerant can be guaranteed to be less influenced by the action of gravity, the heat exchange is more uniform, and the heat exchange performance of the micro-channel heat exchanger is effectively improved.
Drawings
FIG. 1 is an exploded view of a microchannel heat exchanger according to a first embodiment of the present application;
FIG. 2 is a schematic structural view of a microchannel heat exchanger according to a first embodiment of the present application;
FIG. 3 is a perspective view of a manifold of a microchannel heat exchanger according to a first embodiment of the present application;
FIG. 4 is a schematic structural view of a collector leg of a microchannel heat exchanger according to a first embodiment of the present application;
FIG. 5 is an exploded view of a microchannel heat exchanger according to a second embodiment of the present application;
FIG. 6 is a schematic perspective view of a microchannel heat exchanger according to a second embodiment of the present application;
FIG. 7 is a schematic structural diagram of a fixing frame of a microchannel heat exchanger according to a second embodiment of the present application;
FIG. 8 is an enlarged structural view at A of FIG. 7;
FIG. 9 is a schematic structural view of a collector leg of a microchannel heat exchanger according to a second embodiment of the present application;
fig. 10 is a schematic view of an assembly structure of a microchannel heat exchanger according to an embodiment of the present application.
The reference numerals are represented as:
1. a header pipe; 2. a gas collecting pipe; 3. heat exchange flat tubes; 4. a spacer; 5. a shunt tube; 6. a liquid collecting branch pipe; 7. a gas collecting branch pipe; 8. a communicating hole; 9. an injection hole; 10. a threaded hole; 11. an external thread; 12. a connecting section; 13. bending sections; 14. a fixed mount; 15. a positioning ring; 16. mounting holes; 17. positioning holes; 18. caulking grooves; 19. a flow guide pipe; 20. and heat exchange fins.
Detailed Description
Referring to fig. 1 to 10 in combination, according to the embodiment of the present application, the microchannel heat exchanger includes a collecting pipe 1 and a collecting pipe 2, a plurality of heat exchange flat pipes 3 are provided between the collecting pipe 1 and the collecting pipe 2, a first end of each heat exchange flat pipe 3 is communicated with the collecting pipe 1, a second end of each heat exchange flat pipe 3 is communicated with the collecting pipe 2, at least one spacer 4 is provided on the collecting pipe 1, the spacer 4 separates the collecting pipe 1 into at least two shunt pipes 5, each shunt pipe 5 is provided with at least one collecting branch pipe 6 correspondingly, at least two collecting branch pipes 7 are provided on the collecting pipe 2 along the axial direction at intervals, and the shunt pipes 5 are communicated with the collecting branch pipes 7 in a.
The microchannel heat exchanger is segmented by the partition plates 4 to form a plurality of shunt pipes 5, each shunt pipe 5 is an independent space, so when a refrigerant enters the collecting pipe 1 from the liquid collecting branch pipes 6, the refrigerants entering the collecting pipe 1 from each liquid collecting branch pipe 6 cannot influence each other, and can flow from the corresponding heat exchange flat pipe 3 through the shunt pipes 5 for heat exchange, thereby effectively improving the problem that the refrigerant in a gas-liquid two-phase state is easy to generate gas-liquid layering phenomenon under the action of gravity to cause uneven refrigerant flow distribution, the microchannel heat exchanger shunts the gas collecting pipe 2 through the gas collecting branch pipe 7 to ensure that the shunt pipes 5 are communicated with the gas collecting branch pipe 7 one by one, the flat pipe heat exchange 3 corresponding to each shunt pipe 5 can simultaneously correspond to one gas collecting branch pipe 7, and the microchannel heat exchanger can refrigerate or refrigerate, the refrigerant can be guaranteed to be less influenced by the gravity action, heat exchange is more uniform, and the heat exchange performance of the micro-channel heat exchanger is effectively improved.
The vertical setting of pressure manifold 1, along the direction from top to bottom, the quantity of the heat transfer flat pipe 3 of shunt tubes 5 intercommunication increases progressively.
The microchannel heat exchanger is characterized in that the heat exchange flat tubes 3 and the collecting tube 1 are divided into different cavity flow paths by the spacers 4, the cavity flow paths are A, B, C, D, E and the like from top to bottom in sequence, wherein the number of the flat tubes corresponding to A, B, C, D, E and the like is increased in sequence, and each cavity flow path corresponds to one liquid collecting branch tube 6 and one gas collecting branch tube 7.
When in heating, the liquid refrigerant enters A, B, C, D, E and other cavity flow paths from the liquid collecting branch pipe 6 of each cavity, and the number of the heat exchange flat pipes 3 corresponding to the cavities is different, so that the liquid refrigerant is sequentially increased from the cavity A downwards, the flow rate of the refrigerant corresponding to the flat pipe in the cavity A is large, namely the flow rate of the refrigerant in the heat exchange flat pipe 3 in each cavity flow path is reduced from A-B-C-D-E- … … in sequence, the wind generated by the rotation of the fan blade, the air quantity formed by each cavity on the two micro-channels is also reduced from A-B-C-D-E- … … in turn, therefore, the local air quantity with large refrigerant flow of the heat exchanger is large, otherwise, the local air quantity with small refrigerant flow is small, the heat exchange of each cavity flow path of the whole micro-channel heat exchanger is more uniform, and the heat exchange of the whole heat exchanger is more uniform.
During refrigeration, gaseous refrigerant on the side of the gas collecting pipe 2 enters the microchannel heat exchanger through each gas collecting branch pipe 7, the distance between every two gas collecting branch pipes 7 is designed to be increased in sequence from top to bottom, then, the refrigerant flowing through each heat exchange flat pipe 3 from top to bottom is reduced in sequence, the heat exchange air quantity on the microchannel heat exchanger is reduced in sequence from top to bottom, the air speed corresponding to the heat exchanger part with too much refrigerant flow is large, otherwise, the air quantity corresponding to the microchannel heat exchanger part with too little refrigerant flow is small, and the heat exchange of the whole heat exchanger is more uniform.
The vertical setting of pressure manifold 1, collection liquid branch pipe 6 include intercommunicating pore 8 and jet orifice 9, and jet orifice 9 is located shunt tubes 5, and the drill way of jet orifice 9 is up, can be when the double-phase refrigerant of gas-liquid enters into pressure manifold 1 from collection liquid branch pipe 6 in, form the injection state from jet orifice 9 to make the refrigerant more even in the flat intraductal 3 distribution of heat transfer that this shunt tubes 5 correspond, further improve microchannel heat exchanger's heat exchange efficiency.
The liquid collecting branch pipe 6 is provided with an external thread 11, the shunt pipe 5 is provided with a threaded hole 10, the liquid collecting branch pipe 6 is in threaded connection with the threaded hole 10 through the external thread 11, and the liquid collecting branch pipe 6 is welded and fixed on the shunt pipe 5.
In this embodiment, be threaded connection between collection liquid branch pipe 6 and shunt tubes 5, when collection liquid branch pipe 6 rotated to extreme position, the orifice of injection hole 9 was up.
The temperature of the two micro-channel furnace-through welding is over 600 ℃, so that the problems of looseness of the liquid collecting branch pipe 6, incapability of ensuring the size, welding dislocation and the like can be caused. The part that inserts collecting pipe 6 into pressure manifold 1 is processed into external screw thread 11, the patchhole that corresponds at every cavity flow path of pressure manifold 1 is processed into screw hole 10, length through the external screw thread 11 of control collecting pipe 6, the degree of depth that inserts collecting pipe 6 into pressure manifold 1 is controlled, and ensure that collecting pipe 6 screws up the location back, the drill way of jet orifice 9 just in time is vertical upwards, collecting pipe 6 also can firmly be fixed on pressure manifold 1 in addition, can guarantee that collecting pipe 6's jet orifice 9 is vertical upwards when microchannel heat exchanger crosses stove welding, can guarantee welding process collecting pipe 6's position complete fixation simultaneously, do not return and make collecting pipe 6 misplace because of expend with heat and contract with cold, satisfy the machining size requirement. The structure can be applied to a row of micro-channel heat exchangers, two rows of micro-channel heat exchangers and three rows of micro-channel heat exchangers, and the implementation process of each row is the same.
In another embodiment, the branch liquid collecting pipe 6 is connected with a connecting section 12 and a bent section 13, the injection holes 9 are arranged on the connecting section 12, and the orifices of the injection holes 9 are in the same direction in the bending direction of the bent section 13. In this embodiment, through setting up bending section 13 to make bending direction of bending section 13 the same with the drill way orientation of jet orifice 9, can conveniently realize the installation location to jet orifice 9 through the mode of location bending section 13 when the installation, easy operation is convenient.
The microchannel heat exchanger further comprises a fixing frame 14, the fixing frame 14 is installed on the collecting pipe 1, and the collecting branch pipe 6 is fixed through the fixing frame 14. In this embodiment, the liquid collecting branch pipe 6 is not directly fixed to the header 1, but fixed to the fixing frame 14, and then the liquid collecting branch pipe 6 is fixed to the header 1 by fixing the fixing frame 14 to the header 1. This kind of mode can utilize mount 14 to carry out the installation of collection liquid branch pipe 6 fixed, consequently can reduce the cooperation requirement between collection liquid branch pipe 6 and the pressure manifold 1, reduces the assembly degree of difficulty.
In one embodiment, the liquid collecting branch pipe 6 is provided with a positioning ring 15, the fixing frame 14 is provided with a mounting hole 16 and a positioning hole 17, the mounting hole 16 is communicated with the positioning hole 17, the diameter of the mounting hole 16 is larger than or equal to that of the positioning ring 15, and the diameter of the positioning hole 17 is smaller than that of the positioning ring 15. The positioning ring 15 may be integrally formed with the branch liquid collecting pipe 6, or may be separately formed and then fixed to the outer periphery of the branch liquid collecting pipe 6. The retaining ring 15 can inject the depth of insertion of collecting branch pipe 6 in collecting main 1 on the one hand, on the other hand can and mount 14 between form fixed coordination, can utilize mount 14 to compress tightly on retaining ring 15 to make collecting branch pipe 6 install on collecting main 1 steadily and reliably, avoid collecting branch pipe to deviate from when the stove welding.
In this embodiment, the mount 14 is tied up tightly through the ribbon and is fixed on pressure manifold 1 to can guarantee that mount 14 compresses tightly album of liquid branch pipe 6, also conveniently realize that the installation of mount 14 on pressure manifold 1 is fixed simultaneously.
In this embodiment, the holes in the fixing frame 14 are designed to be the mounting holes 16 and the positioning holes 17 which are communicated with each other, and when the fixing frame is installed, the characteristic that the hole diameter of the mounting hole 16 is larger than that of the positioning ring 15 can be utilized, so that the positioning ring 15 of the liquid collecting branch pipe 6 can be installed on one side, close to the collecting pipe 1, of the fixing frame 14 from the mounting hole 16, the positioning ring 15 is stopped outside the collecting pipe 1, and the installation depth of the liquid collecting branch pipe 6 is positioned. The position of the fixing frame 14 can be adjusted later, so that the positioning hole 17 of the fixing frame 14 is clamped outside the positioning ring 15 to form a stop for the positioning ring 15, and the positioning ring 15 can be limited between the fixing frame 14 and the collecting main 1 because the aperture of the positioning hole 17 is smaller than that of the positioning ring 15, and then the fixing frame 14 can be fixed on the collecting main 1, so that the mounting and fixing of the collecting branch pipe 6 on the collecting main 1 are realized.
In the embodiment, an included angle β is formed between the bending section 13 and the connecting section 12, and β is an obtuse angle, and in order to reduce the flow loss of the refrigerant flowing from the bending section 13 to the connecting section 12, in one embodiment, β is greater than or equal to 150 °.
The liquid collecting branch pipe 6 is provided with a flow control valve which can accurately control the refrigerant flow of each flow path cavity, thereby achieving the purpose of reducing the refrigerant flow of each cavity flow path from top to bottom in sequence.
The collecting pipe 1 is provided with an embedded groove 18 along the radial direction, and the spacer 4 is embedded into the embedded groove 18 to separate the collecting pipe 1. Offer caulking groove 18 in the periphery of pressure manifold 1, then pack into caulking groove 18 with spacer 4 in to and form interference fit between caulking groove 18, perhaps glue fixation etc. realize the sealed cooperation between spacer 4 and the caulking groove 18, thereby effectively avoided the refrigerant to leak, and the problem of the refrigerant series connection between shunt tubes 5, can improve microchannel heat exchanger's heat transfer performance more effectively.
The gas collecting pipes 2 are vertically arranged, and the number of the heat exchange flat pipes 3 between the adjacent gas collecting branch pipes 7 is increased progressively along the direction from top to bottom.
And one end of the gas collecting branch pipe 7 far away from the gas collecting pipe 2 is provided with a flow guide pipe 19. In the process of refrigeration, when the microchannel heat exchanger is used as a condenser, the refrigerant flows from the side of the gas collecting pipe 2 to the side of the collecting pipe 1, and the flow guide pipe 19 is used as a shunt pipe at the moment. In the heating process, when the microchannel heat exchanger is used as an evaporator, the refrigerant flows from the side of the collecting pipe 1 to the side of the gas collecting pipe 2, and the flow guide pipe 19 is used as a collecting pipe.
The heat exchange fins 20 are mounted on the heat exchange flat tubes 3, so that the heat exchange efficiency of the heat exchange flat tubes 3 can be further improved.
According to an embodiment of the present application, an air conditioner includes a microchannel heat exchanger, which is the above-mentioned microchannel heat exchanger.
It is readily understood by a person skilled in the art that the advantageous ways described above can be freely combined, superimposed without conflict.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed. The foregoing is only a preferred embodiment of the present application, and it should be noted that, for those skilled in the art, several modifications and variations can be made without departing from the technical principle of the present application, and these modifications and variations should also be considered as the protection scope of the present application.
Claims (14)
1. The utility model provides a microchannel heat exchanger, its characterized in that, includes pressure manifold (1) and gas collecting pipe (2), pressure manifold (1) with be provided with a plurality of heat transfer flat pipe (3) between gas collecting pipe (2), the first end of heat transfer flat pipe (3) with pressure manifold (1) intercommunication, the second end of heat transfer flat pipe (3) with gas collecting pipe (2) intercommunication, be provided with at least one spacer (4) on pressure manifold (1), spacer (4) will pressure manifold (1) is separated for two at least shunt tubes (5), and every shunt tube (5) corresponds respectively and is provided with at least one liquid collecting branch pipe (6), be provided with two at least gas collecting branch pipe (7) along axial interval on gas collecting pipe (2), shunt tube (5) with gas collecting branch pipe (7) one-to-one intercommunication.
2. The microchannel heat exchanger according to claim 1, wherein the header pipe (1) is vertically arranged, and the number of the heat exchange flat pipes (3) communicated with the shunt pipes (5) increases along the direction from top to bottom.
3. The microchannel heat exchanger according to claim 1, wherein the collecting pipe (1) is vertically arranged, the collecting branch pipe (6) comprises a communication hole (8) and an injection hole (9), the injection hole (9) is positioned in the flow dividing pipe (5), and the hole opening of the injection hole (9) faces upwards.
4. The micro-channel heat exchanger according to claim 3, wherein the collector branch pipe (6) is provided with an external thread (11), the shunt pipe (5) is provided with a threaded hole (10), and the collector branch pipe (6) is screwed on the threaded hole (10) through the external thread (11); or the liquid collecting branch pipe (6) is welded and fixed on the shunt pipe (5).
5. The microchannel heat exchanger according to claim 4, wherein the orifices of the injection holes (9) face upward when the liquid collecting branch pipe (6) is rotated to the extreme position.
6. The microchannel heat exchanger according to claim 3, wherein the branch collecting pipe (6) is provided with a connecting section (12) and a bent section (13), the injection holes (9) are arranged on the connecting section (12), and the bending direction of the bent section (13) is the same as the direction of the orifices of the injection holes (9).
7. The microchannel heat exchanger according to any one of claims 3 to 6, further comprising a fixing frame (14), wherein the fixing frame (14) is mounted on the header (1), and the header pipe (6) is fixed by the fixing frame (14).
8. The microchannel heat exchanger according to claim 7, wherein the liquid collecting branch pipe (6) is provided with a positioning ring (15), the fixing frame (14) is provided with a mounting hole (16) and a positioning hole (17), the mounting hole (16) is communicated with the positioning hole (17), the diameter of the mounting hole (16) is larger than or equal to the diameter of the positioning ring (15), and the diameter of the positioning hole (17) is smaller than the diameter of the positioning ring (15).
9. The microchannel heat exchanger according to any one of claims 1 to 6, wherein a flow control valve is provided on the liquid collecting branch pipe (6).
10. The microchannel heat exchanger according to any one of claims 1 to 6, wherein the header (1) is provided with caulking grooves (18) in a radial direction, and the spacers (4) are embedded in the caulking grooves (18) to separate the header (1).
11. The microchannel heat exchanger according to claim 1, wherein the gas collecting pipes (2) are vertically arranged, and the number of the heat exchange flat pipes (3) between the adjacent gas collecting branch pipes (7) increases along the direction from top to bottom.
12. The microchannel heat exchanger according to claim 1, wherein the end of the gas collecting branch pipe (7) remote from the gas collecting pipe (2) is provided with a flow guiding pipe (19).
13. The microchannel heat exchanger according to any one of claims 1 to 6, wherein heat exchange fins (20) are mounted on the heat exchange flat tubes (3).
14. An air conditioner comprising a microchannel heat exchanger, wherein the microchannel heat exchanger is as claimed in any one of claims 1 to 13.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011001023.6A CN112146466A (en) | 2020-09-22 | 2020-09-22 | Microchannel heat exchanger and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011001023.6A CN112146466A (en) | 2020-09-22 | 2020-09-22 | Microchannel heat exchanger and air conditioner |
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| Publication Number | Publication Date |
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| CN112146466A true CN112146466A (en) | 2020-12-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011001023.6A Pending CN112146466A (en) | 2020-09-22 | 2020-09-22 | Microchannel heat exchanger and air conditioner |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113847757A (en) * | 2021-09-28 | 2021-12-28 | 珠海格力电器股份有限公司 | Heat exchanger and air conditioner |
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