CN111397408A - Three-dimensional netted heat exchanger and heat exchange device - Google Patents
Three-dimensional netted heat exchanger and heat exchange device Download PDFInfo
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- CN111397408A CN111397408A CN201910204782.3A CN201910204782A CN111397408A CN 111397408 A CN111397408 A CN 111397408A CN 201910204782 A CN201910204782 A CN 201910204782A CN 111397408 A CN111397408 A CN 111397408A
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- heat
- heat exchange
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- transition piece
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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
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
- F28D15/02—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies in which the medium condenses and evaporates, e.g. heat pipes
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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
- F28D15/00—Heat-exchange apparatus with the intermediate heat-transfer medium in closed tubes passing into or through the conduit walls ; Heat-exchange apparatus employing intermediate heat-transfer medium or bodies
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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
- F28D17/00—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles
- F28D17/02—Regenerative heat-exchange apparatus in which a stationary intermediate heat-transfer medium or body is contacted successively by each heat-exchange medium, e.g. using granular particles using rigid bodies, e.g. of porous material
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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
- F28F1/14—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
- F28F1/20—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 being attachable to the 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
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/02—Constructions of heat-exchange apparatus characterised by the selection of particular materials of carbon, e.g. graphite
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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
- F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
- F28F21/08—Constructions of heat-exchange apparatus characterised by the selection of particular materials of metal
Abstract
The invention relates to a three-dimensional mesh heat exchanger and a heat exchange device, wherein the three-dimensional mesh heat exchanger comprises a three-dimensional heat exchange net and a heat exchange transition piece, the heat exchange transition piece is a heat exchange transition device between a heat exchange main body and the three-dimensional heat exchange net, and the heat exchange transition piece is tightly contacted with the three-dimensional heat exchange net and welded into a whole; the three-dimensional heat exchange net has the function of transferring heat transferred by the heat exchange transition piece to external fluid so as to play a role in heat exchange, and is formed by three-dimensionally weaving heat-conducting filaments or folding and welding a plurality of two-dimensional woven nets. The heat exchange device consists of a heat storage body, a heat transfer medium driving pump and a fan. The three-dimensional net-shaped heat exchanger and the heat exchange device disclosed by the invention have the advantages of high heat exchange efficiency and portability.
Description
Technical Field
The invention relates to a heat exchanger and a radiator, in particular to a three-dimensional mesh heat exchanger and a heat exchange device based on the three-dimensional mesh heat exchanger.
Background
The finned aluminum profile radiator in the prior art is widely used for radiating electronic components, utilizes more fins to contact with air so as to transfer heat to the air, and has the advantages of simple and convenient use, low radiating efficiency and heavy weight. The plate heat exchanger has high heat exchange efficiency, hot fluid and cold fluid flow between a pair of stamping plates, heat is transferred from a hot edge to a cold edge through a metal plate, the hot fluid transfers heat to the metal plate, the metal plate transfers heat to the cold fluid, the heat transfer efficiency in the whole process is very high, the processing process mainly has low manufacturing cost of a stamping process, and the plate heat exchanger has the problems that a flow channel is very narrow and easy to block, and the heat exchanger cannot work once being blocked. Both the shell-and-tube heat exchanger and the plate heat exchanger have the advantage of compact structure, and the plate heat exchanger can not exchange heat in a larger heat exchange space, so that the application in the field of large-space waste heat recovery is limited.
In order to release heat of a smaller space for heat conversion of a larger space or heat of the smaller space to the larger space, a heat exchanger with higher heat exchange efficiency than that of the existing plate heat exchanger is developed at the same time, and the heat exchanger is applied to the fields of low-grade waste heat recovery, heat dissipation and cooling and the like. The designer finally creates the invention with practical value after continuous research, design, experiment and improvement.
Disclosure of Invention
The invention mainly aims to overcome the defects that the heat exchanger in the prior art has low heat exchange efficiency and can not exchange heat in a large space, and provides a heat exchanger with a novel structure, namely a three-dimensional net-shaped heat exchanger and a heat exchange device based on the three-dimensional net-shaped heat exchanger. The technical problem to be solved is to design a three-dimensional net-shaped heat exchanger, which comprises a heat exchange transition piece and a three-dimensional heat exchange net, wherein the three-dimensional heat exchange net is tightly contacted with the heat exchange transition piece and welded into a whole, the heat exchange transition piece transfers heat out of a heat exchange main body, and then the heat is dissipated into air or other fluids through the three-dimensional heat exchange net. The extrusion type aluminum fin radiator, the shell-and-tube heat exchanger and the plate heat exchanger in the scheme and the prior art are mainly characterized in that a high-density three-dimensional heat exchange net is introduced, so that the heat exchange area (dozens to hundreds of times larger) with air (or other fluids) is greatly increased, and meanwhile, the turbulence heat exchange efficiency easily formed on the surface of the filament is greatly improved (dozens to hundreds of times higher) than that of a flat plate structure.
The purpose of the invention and the technical problem to be solved are realized by adopting the following technical scheme.
The three-dimensional net-shaped heat exchanger provided by the invention is characterized by comprising the following components:
a three-dimensional mesh heat exchanger, characterized in that it comprises a three-dimensional heat exchange mesh and a heat exchange transition piece; the heat exchange transition piece is a heat exchange transition device between the heat exchange main body and the three-dimensional heat exchange net, and the heat exchange transition piece is tightly contacted with the three-dimensional heat exchange net; the three-dimensional heat exchange net is formed by three-dimensionally weaving heat conducting filaments or by folding and welding a plurality of two-dimensional woven nets and has the function of transferring heat transferred by the heat exchange transition piece to external fluid.
Furthermore, the two-dimensional woven mesh is woven by using a plain weave, an oblique weave, a satin weave or a dutch weave for heat conducting filaments, the filament diameter is 0.05 mm-2 mm, meshes are square holes, rhombic holes or triangular holes, and the mesh density is 0.2 mesh-60 mesh.
Further, the heat conducting filaments are metal filaments or graphite fiber filaments.
Further, the folded cross-sectional pattern of the two-dimensional woven mesh is a triangle, a quadrangle or a hexagon.
Furthermore, the heat exchange transition piece is a metal block, and the heat exchange transition piece and the three-dimensional heat exchange net are welded into a whole.
Further, the heat exchange transition piece is a metal pipeline, wherein a heat transfer medium flows through the metal pipeline, and the metal pipeline and the three-dimensional heat exchange net are welded into a whole.
Further, the heat exchange transition piece is a heat pipe, wherein a phase change heat exchange medium flows through the heat pipe, and the heat pipe and the three-dimensional heat exchange net are welded into a whole.
Further, when the heat conducting filaments of the three-dimensional heat exchange network are metal filaments, the intersections between the filaments are welded.
The heat exchange device provided by the invention comprises a heat exchange body, a heat transfer medium driving pump, a plurality of fans or pumps, and is characterized by comprising the three-dimensional mesh heat exchanger in any one of the claims; the heat exchange main body is an object which releases heat or absorbs heat; the heat of the heat exchange body is transported by the heat transfer medium; the heat transfer medium driving pump drives the heat transfer medium to flow in the heat exchange transition piece; the fans or the pumps blow air to the three-dimensional net-shaped heat exchanger or drive external fluid of the heat exchange transition piece to flow, so that heat exchange of the three-dimensional net-shaped heat exchanger is accelerated.
Further, the fans or the pumps blow air to the three-dimensional mesh heat exchanger or drive external fluid of the heat exchange transition piece to flow along different directions of the three-dimensional mesh heat exchanger, and the rotating speeds of the fans or the pumps are adjustable.
According to the technical scheme, the three-dimensional net-shaped heat exchanger has the following advantages: the heat exchange area between the three-dimensional heat exchange net and the air or the external fluid is increased by dozens of to hundreds of times, meanwhile, the surface of the filament is easy to form turbulent heat exchange coefficient, the heat exchange coefficient is increased by dozens of to hundreds of times compared with that of a flat plate structure, and the pressure drop of the fluid flow of the air or the external fluid is reduced. The heat exchange transition piece is tightly contacted with the three-dimensional heat exchange net and welded into a whole, so that the conduction thermal resistance is reduced as much as possible. The fans blow (or pump out fluid) to the three-dimensional heat exchange net along different directions of the three-dimensional net-shaped heat exchanger, so that the blowing (or the fluid) in certain directions takes heat away from the net surface of the three-dimensional heat exchange net, the blowing (or the fluid) in certain directions takes the heat away from the net body area of the three-dimensional heat exchange net, and the heat is blown to the atmosphere (or the fluid) by utilizing the characteristic of small resistance in certain directions of the three-dimensional net-shaped heat exchanger. The three-dimensional net-shaped heat exchanger also has the advantages of being convenient to clean, corrosion-resistant and not easy to block.
The foregoing description is only an overview of the technical solutions of the present invention, and in order to make the technical solutions of the present invention more clearly understood and to implement them in accordance with the contents of the description, the following detailed description is given with reference to the preferred embodiments of the present invention and the accompanying drawings.
Drawings
Fig. 1 is a three-dimensional schematic view of a three-dimensional mesh heat exchanger according to a first embodiment of the present invention (the heat exchange transition piece is a copper block).
Fig. 2 is a schematic front view of a three-dimensional mesh heat exchanger according to a first embodiment of the present invention (the heat exchange transition piece is a copper block).
Fig. 3 is a schematic side view of a three-dimensional mesh heat exchanger according to a first embodiment of the invention (the heat exchange transition piece is a copper block).
Fig. 4 is a three-dimensional schematic view of a three-dimensional mesh heat exchanger according to a second embodiment of the present invention (the heat exchange transition piece is a copper tube).
Fig. 5 is a schematic top view of a three-dimensional mesh heat exchanger according to a second embodiment of the present invention (the heat exchange transition piece is a copper tube).
Fig. 6 is a schematic front view of a three-dimensional mesh heat exchanger according to a second embodiment of the present invention (the heat exchange transition piece is a copper tube).
Fig. 7 is a schematic side view of a three-dimensional mesh heat exchanger according to a second embodiment of the present invention (the heat exchange transition piece is a hot copper tube).
Fig. 8 is a schematic diagram of a front view of a three-dimensional mesh heat exchanger according to a third embodiment of the present invention (the heat exchange transition piece is a heat pipe).
Fig. 9 is a schematic view of a heat exchange device based on a three-dimensional mesh heat exchanger according to a fourth embodiment of the present invention (the heat exchange transition piece is a copper pipe, a liquid heat transfer medium flows inside the copper pipe, and a liquid heat transfer medium flows outside the copper pipe).
Fig. 10 is a schematic view of a heat exchange device based on a three-dimensional mesh heat exchanger according to a fifth embodiment of the present invention (the heat exchange transition piece is a copper pipe, a liquid heat transfer medium flows inside the copper pipe, and air flows outside the copper pipe).
1. The heat exchange transition piece 2, the three-dimensional heat exchange net 3 and the flexible circuit board FPC 4, L ED lamps;
10. a box body 11 for containing the three-dimensional net-shaped heat exchanger, a 1 st heat transfer medium inlet 12, a 1 st heat transfer medium outlet 13, a 2 nd heat transfer medium inlet 14 and a 2 nd heat transfer medium outlet;
20. a box body 21 for containing the heat exchange main body, a heat transfer medium drive pump 22, a fan 23 and a heat transfer medium conveying pipeline.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description will be given to the specific embodiments, structures, features and effects of a three-dimensional mesh heat exchanger according to the present invention with reference to the accompanying drawings and preferred embodiments.
Fig. 1 is a three-dimensional schematic diagram of a three-dimensional mesh heat exchanger according to a first embodiment of the present invention, fig. 2 is a front view, fig. 3 is a side view, a heat exchange transition piece (1) is a red copper block, the length is 6 cm, the width is 6 cm, the thickness is 0.5 cm, the lower end of the heat exchange transition piece is in contact with a heat exchange main body (not shown in the figure), the heat exchange transition piece (1) absorbs heat of the heat exchange main body and transmits the heat to an upper three-dimensional heat exchange mesh (2), the three-dimensional heat exchange mesh (2) is formed by bending and welding a two-dimensional tin-plated red copper woven mesh, the wire diameter is 0.3mm, the mesh size is 20 meshes, the length of a folded equilateral triangle is 1 cm, the length of the three-dimensional heat exchange mesh (2) is 6 cm, the width is 6 cm. The heat exchange main body (not shown in the figure) applies 50 watts of power, the room temperature is 16.6 ℃, the natural heat dissipation is realized, the temperature of the three-dimensional heat exchange net (2) is 139-3。
Referring to fig. 4, which is a three-dimensional schematic view of a three-dimensional mesh heat exchanger according to a second embodiment of the present invention, fig. 5 is a top view, fig. 6 is a front view, and fig. 7 is a side view, and the heat exchange transition piece (1) is a copper tube having an inner diameter of 6 mm, an outer diameter of 8 mm, a thickness of 1 mm, and a length of 12 cm. The copper tube is welded with the three-dimensional heat exchange net (2) to ensure good heat conduction. 2 heating rods (not shown in the figure) of 200 watts are inserted into the copper tube, the heating rods are connected with a voltage-adjustable power supply (not shown in the figure), and the heat of the heating rods is transferred to the three-dimensional heat exchange net (2). The three-dimensional heat exchange net (2) is formed by bending and welding a two-dimensional tinned red copper woven net, the side length of the bent regular hexagon is 8 mm,the diameter of the two-dimensional tinned red copper braided mesh is 0.3mm and is 40 meshes. The three-dimensional heat exchange net (2) is 6.4 cm long, 6.4 cm wide and 4.2 cm high. The heating rod applies 120 watts of power, the fan (not shown in the figure) cools the air at the speed of 2 m/s, the room temperature is 15.4 ℃, the temperature of the three-dimensional heat exchange net (2) is 60-99 ℃, and the heat dissipation efficiency is 8000 watts/DEG C meter3。
As shown in fig. 8, which is a schematic diagram of a front view of a three-dimensional mesh heat exchanger according to a third embodiment of the present invention, a heat exchange transition member (1) is a heat pipe, a phase change heat medium is filled in the heat pipe, the heat pipe is pumped to a low pressure, the inner diameter is 6 mm, the outer diameter is 8 mm, the thickness is 1 mm, and the length is 12 cm, a flexible printed circuit board FPC (3) is tightly wound on the upper end of the heat pipe to ensure good heat conduction, 2 pieces of L ED lamps (4) with 5 watts are welded on the flexible printed circuit board FPC (3), the heat pipe is welded with a three-dimensional heat exchange mesh (2) to ensure good heat conduction, the three-dimensional heat exchange mesh (2) is formed by bending and welding a two-dimensional tin-plated red copper woven mesh, the length of the folded regular hexagon is 8 mm, the wire diameter of the two-dimensional tin-plated red copper woven mesh is 0.3mm, the mesh size is 40 meshes, the length of the three-dimensional heat exchange mesh (2) is 4 cm, the width is 4 cm, the height is 4.2 cm, the three-dimensional heat exchange mesh (2).
Fig. 9 is a schematic diagram of a heat exchange device based on a three-dimensional mesh heat exchanger according to a fourth embodiment of the present invention, in which a box (10) for accommodating the three-dimensional mesh heat exchanger is provided, in order to show that an upper cover plate of an internal structure is not shown, a heat exchange transition piece (1) is a copper pipe, and the heat exchange transition piece (1) is welded to a three-dimensional heat exchange net (2) to ensure good heat conduction. The three-dimensional heat exchange net (2) is formed by bending and welding a two-dimensional tinned red copper woven net. The 1 st heat transfer medium is a high-temperature heat transfer medium which brings heat from a heat exchange body (not shown in the figure) and flows into the heat exchange body at the temperature of 100 ℃, and the 1 st heat transfer medium flows in from a 1 st heat transfer medium inlet (11) and flows out from a 1 st heat transfer medium outlet (12). The 2 nd heat transfer medium is a low-temperature heat transfer medium which carries away heat and has the inflow temperature of 30 ℃, and the 2 nd heat transfer medium flows in from the 2 nd heat transfer medium inlet (13) and flows out from the 2 nd heat transfer medium outlet (14). The heat brought by the 1 st heat transfer medium is transferred to the 2 nd heat transfer medium through the heat exchange transition piece (1) and the three-dimensional heat exchange net (2), so that the heat exchange is realized.
Referring to fig. 10, which is a schematic view of a heat exchange device based on a three-dimensional mesh heat exchanger according to a fifth embodiment of the present invention, a heat exchange body (not shown) is accommodated inside a box (20) for accommodating the heat exchange body, and the heat exchange body may be a heat generating component such as a transformer core, a motor coil, and the like. The heat transfer medium drives the heat transfer medium to flow to the heat exchange transition piece (1) in the heat transfer medium conveying pipeline (23) through the heat transfer medium driving pump (21). The heat exchange transition piece (1) is a copper pipe, and the heat exchange transition piece (1) is welded with the three-dimensional heat exchange net (2) to ensure good heat conduction. The three-dimensional heat exchange net (2) is formed by bending and welding a two-dimensional tinned red copper woven net. Heat is transferred to air through the heat exchange transition piece (1) and the three-dimensional heat exchange net (2), the fans (22) are used for realizing forced air cooling and heat dissipation, the number of the fans (22) can be 1 or more (1 is shown in figure 10), and the air speed can be adjusted by adjusting a driving power supply (not shown in the figure) of the fans (22).
The above description is only one embodiment of the present invention, and is not intended to limit the present invention in any way, and those skilled in the art can make various changes and modifications to the equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A three-dimensional mesh heat exchanger, characterized in that it comprises a three-dimensional heat exchange mesh and a heat exchange transition piece; the heat exchange transition piece is a heat exchange transition device between the heat exchange main body and the three-dimensional heat exchange net, and the heat exchange transition piece is tightly contacted with the three-dimensional heat exchange net; the three-dimensional heat exchange net is formed by three-dimensionally weaving heat conducting filaments or by folding and welding a plurality of two-dimensional woven nets and has the function of transferring heat transferred by the heat exchange transition piece to external fluid.
2. The three-dimensional mesh heat exchanger according to claim 1, wherein the two-dimensional mesh grid is woven by using a plain weave, a twill weave, a satin weave or a dutch weave for the heat conductive filaments, the filament diameter is 0.05 mm to 2 mm, the mesh holes are square holes, rhombic holes or triangular holes, and the mesh hole density is 0.2 mesh to 60 mesh.
3. The three-dimensional mesh heat exchanger according to claim 1, wherein the heat conductive filaments are metal filaments or graphite fiber filaments.
4. The three-dimensional mesh heat exchanger according to claim 1, wherein the two-dimensional woven mesh is folded in a cross-sectional pattern of a triangle, a quadrangle or a hexagon.
5. The three-dimensional mesh heat exchanger according to claim 1, wherein the heat exchanging transition piece is a metal block, and the heat exchanging transition piece is welded to the three-dimensional heat exchange mesh as a whole.
6. The three-dimensional reticulated heat exchanger of claim 1, wherein the heat exchange transition piece is a metal tube through which a heat transfer medium flows, the metal tube being welded to the three-dimensional heat exchange mesh as a unitary body.
7. The three-dimensional mesh heat exchanger according to claim 1, wherein the heat exchange transition member is a heat pipe through which a phase change heat transfer medium flows, and the heat pipe is welded to the three-dimensional heat exchange mesh as a single body.
8. The three-dimensional mesh heat exchanger according to claim 3, wherein when the heat conductive filaments of the three-dimensional heat exchange mesh are metal filaments, the intersections between the filaments are welded.
9. A heat exchange device comprising a heat exchange body, a heat transfer medium driven pump, a plurality of fans or pumps, characterized in that it comprises a three-dimensional mesh heat exchanger according to any one of the preceding claims; the heat exchange main body is an object for releasing heat or absorbing heat, and the heat of the heat exchange main body is transported by the heat transfer medium; the heat transfer medium driving pump drives the heat transfer medium to flow in the heat exchange transition piece; the fans or the pumps blow air to the three-dimensional net-shaped heat exchanger or drive external fluid of the heat exchange transition piece to flow, so that heat exchange of the three-dimensional net-shaped heat exchanger is accelerated.
10. The heat exchange device according to claim 9, wherein the plurality of fans or pumps are arranged along different directions of the three-dimensional mesh heat exchanger to blow air to the three-dimensional mesh heat exchanger or drive external fluid of the heat exchange transition piece to flow, and the rotation speeds of the plurality of fans or pumps are adjustable.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910204782.3A CN111397408A (en) | 2019-03-18 | 2019-03-18 | Three-dimensional netted heat exchanger and heat exchange device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910204782.3A CN111397408A (en) | 2019-03-18 | 2019-03-18 | Three-dimensional netted heat exchanger and heat exchange device |
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| CN111397408A true CN111397408A (en) | 2020-07-10 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114745918A (en) * | 2022-04-11 | 2022-07-12 | 西华大学 | Net type radiator |
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2019
- 2019-03-18 CN CN201910204782.3A patent/CN111397408A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114745918A (en) * | 2022-04-11 | 2022-07-12 | 西华大学 | Net type radiator |
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