CN109526189B - Annular micro-channel heat exchanger and fluid flow heat exchange experimental device thereof - Google Patents
Annular micro-channel heat exchanger and fluid flow heat exchange experimental device thereof Download PDFInfo
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- CN109526189B CN109526189B CN201811441760.0A CN201811441760A CN109526189B CN 109526189 B CN109526189 B CN 109526189B CN 201811441760 A CN201811441760 A CN 201811441760A CN 109526189 B CN109526189 B CN 109526189B
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2029—Modifications to facilitate cooling, ventilating, or heating using a liquid coolant with phase change in electronic enclosures
- H05K7/20327—Accessories for moving fluid, for connecting fluid conduits, for distributing fluid or for preventing leakage, e.g. pumps, tanks or manifolds
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
- H05K7/00—Constructional details common to different types of electric apparatus
- H05K7/20—Modifications to facilitate cooling, ventilating, or heating
- H05K7/2039—Modifications to facilitate cooling, ventilating, or heating characterised by the heat transfer by conduction from the heat generating element to a dissipating body
- H05K7/20509—Multiple-component heat spreaders; Multi-component heat-conducting support plates; Multi-component non-closed heat-conducting structures
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Abstract
The invention discloses a ring-shaped micro-channel heat exchanger and a fluid flow heat exchange experimental device thereof, which comprise a base plate and a U-shaped groove, wherein the number of the U-shaped grooves is two, the two U-shaped grooves are respectively clamped at two opposite sides of the substrate, the substrate comprises an upper cover plate and a lower cover plate, wherein the lower cover plate is provided with four channels, each channel consists of a primary flow channel, a secondary annular flow channel and an inclined flow channel, wherein the primary flow channel of each channel is divided into two parts, the two parts of the primary flow channels are respectively arranged at the two ends of the lower cover plate, wherein the middle of the two parts of the primary flow channels is connected with a secondary annular flow channel, the middle area of the secondary annular flow channel is provided with a plurality of inclined flow channels, the upper cover plate and the lower cover plate are covered to enable each channel to be a closed independent space with openings at two ends, and straight lines where the four channels are located are parallel to straight lines where the two U-shaped grooves are connected.
Description
Technical Field
The invention belongs to the technical field of micro-channel enhanced heat dissipation, and particularly relates to an annular micro-channel heat exchanger and a fluid flow heat exchange experimental device thereof.
Background
With the rapid development of micro-electromechanical systems, ultra-large scale integrated circuits and other technologies, the volume of electronic equipment is smaller and smaller, the power and the integration level are greatly improved, the generation of high heat flux density becomes an irresistible trend, if the heat cannot be taken away rapidly, electronic devices cannot work normally due to high temperature, even are burnt, the heat dissipation effect is required to ensure that the temperature of electronic products is lower, and the temperature difference among the devices of the electronic products is required to be reduced. The traditional heat dissipation method can not meet the heat dissipation requirement of high-load electronic devices. For this reason, some new heat dissipation structures or cooling media are required to solve the heat dissipation problem in the electronic devices with high heat flux density.
Disclosure of Invention
The invention aims to overcome the defects of the prior art, provides an annular microchannel heat exchanger and a fluid flow heat exchange experimental device thereof, and overcomes the defects of the prior art that 1: the traditional heat dissipation mode cannot meet the heat dissipation requirement of a high-load electronic device; 2: the traditional heat exchanger has low heat exchange efficiency; 3: the temperature environment of the electronic device is not reliable, and the like.
In order to solve the technical problem, the technical scheme of the invention is as follows: the utility model provides a loop type microchannel heat exchanger, includes base plate and U type groove, wherein U type groove is two, two U type grooves block respectively in the relative both sides of base plate, the base plate includes upper cover plate and lower apron, and wherein the apron is equipped with four passageways down, every passageway comprises one-level runner, second grade ring type runner and slope runner, and wherein the one-level runner of every passageway divide into two parts, two parts one-level runner sets up respectively in the both ends of apron down, wherein two parts one-level runner intermediate junction second grade ring type runner, and wherein second grade ring type runner intermediate zone is equipped with a plurality of slope runners, upper cover plate and lower cover lid close and to make every passageway become a both ends open-ended airtight independent space, and wherein four passageway place straight lines are parallel with two U type groove connection place straight lines.
Preferably, the four channels are uniformly and mutually parallel arranged on the lower cover plate, wherein the primary flow channel is a linear flow channel, the section of the secondary annular flow channel is annular, two ends of the secondary annular flow channel are respectively connected with two parts of the primary flow channel, the inclined flow channels comprise two parts which are mutually crossed, and the number of the inclined flow channels in each part is three and mutually parallel.
Preferably, the U-shaped groove is provided with four flow collecting grooves and four through holes, the four flow collecting grooves are communicated with the four through holes respectively, the four through holes are arranged in parallel, two ends of the base plate provided with the channel can be in clamping butt joint with the flow collecting grooves, and a pressure gauge connecting pipe is further arranged on one side of the U-shaped groove.
Preferably, the inner side of the collecting tank is provided with a boss, the two ends of the substrate are provided with grooves, and the boss on the inner side of the collecting tank can be clamped in the groove of the substrate.
Preferably, the fluid flow heat exchange experimental device for testing the ring-type microchannel heat exchanger comprises a peristaltic pump, a radiator, a liquid cooling tank, a liquid supply tank and a test area, wherein the test area comprises the ring-type microchannel heat exchanger, the peristaltic pump is connected between the liquid supply tank and the test area, the other end of the test area is connected with the radiator through a pipeline, the other end of the radiator is connected with the liquid cooling tank through a pipeline, and the other end of the liquid cooling tank is connected with the liquid supply tank through a pipeline.
Preferably, the test device further comprises a stop valve, wherein the stop valve comprises a first stop valve and a second stop valve, wherein the first stop valve is disposed between the peristaltic pump and the test zone, wherein the second stop valve is disposed between the liquid cooling tank and the liquid supply tank.
Preferably, the test area further comprises a temperature collector, a pressure gauge, an electric heating device, a flow divider and a flow collector, wherein one end of the flow divider is connected with the peristaltic pump through a pipeline, the other end of the flow divider is connected with the annular microchannel heat exchanger through a pipeline, the other end of the annular microchannel heat exchanger is connected with the flow collector through a pipeline, the other end of the flow collector is connected with the radiator through a pipeline, the electric heating device comprises a direct current power supply and a heat source, the heat source is connected with the direct current power supply, the heat source is arranged on one end face of the annular microchannel heat exchanger, the temperature collector is respectively connected with an inlet end and an outlet end of the annular microchannel heat exchanger, the heat source, a liquid cooling tank and a liquid supply tank, and the.
Preferably, the flow divider comprises a first water inlet pipe and a first water outlet pipe, wherein the first water inlet pipe is communicated with the first water outlet pipe, the number of the first water inlet pipes is one, the number of the first water outlet pipes is four, the first water inlet pipe is connected with the peristaltic pump through a pipeline, and the four first water outlet pipes are respectively connected with four through holes of a U-shaped groove of the annular microchannel heat exchanger.
Preferably, the junction station comprises a second water inlet pipe and a second water outlet pipe, wherein the second water inlet pipe is communicated with the second water outlet pipe, the number of the second water inlet pipes is four, the number of the second water outlet pipes is one, the four second water inlet pipes are respectively connected with four through holes of a U-shaped groove of the annular micro-channel heat exchanger, and one of the second water outlet pipes is connected with the radiator through a pipeline.
Preferably, the heat source is composed of a plurality of thin film resistors, wherein the heat source is coated with insulating materials on all the surfaces except the surface contacting with the annular microchannel heat exchanger.
Compared with the prior art, the invention has the advantages that:
(1) the lower cover plate of the annular microchannel heat exchanger comprises four channels, wherein each channel consists of a primary flow channel, a secondary annular flow channel and an inclined flow channel, the four channels are arranged in the same mode and are uniformly distributed at a certain interval, liquid flows into an inlet of the microchannel heat exchanger in the primary flow channel and then enters one annular secondary annular flow channel, the liquid flows in two opposite directions, the liquid flows to the inclined channels when entering the parallel secondary annular flow channels, the fluid on the two sides forms convection at the intersection of the inclined flow channels, the liquid in the furthest inclined flow channel flows back to the secondary annular flow channel and finally converges in the primary flow channel to flow out of the heat exchanger, and the intersection of the inclined flow channels can improve the heat exchange performance and the temperature equalization performance of the heat exchanger, has high heat dissipation efficiency and can meet the heat dissipation requirement of high-load electronic devices, providing a reliable temperature environment for the electronic device;
(2) the fluid flow heat exchange experimental device comprises a peristaltic pump, a radiator, a liquid cooling box, a liquid supply box and a test area, wherein the test area comprises an annular micro-channel heat exchanger, the peristaltic pump is connected between the liquid supply box and the test area, the other end of the test area is connected with the radiator through a pipeline, the other end of the radiator is connected with the liquid cooling box through a pipeline, the other end of the liquid cooling box is connected with the liquid supply box through a pipeline, the test area further comprises a temperature collector, a pressure gauge, an electric heating device, a flow divider and a confluence device, and the fluid flow heat exchange experimental device can quickly detect the heat exchange effect of the heat exchanger;
(3) the annular micro-channel heat exchanger and the fluid flow heat exchange experimental device have the advantages of simple structure, convenience in operation and low cost, and the working efficiency is greatly improved.
Drawings
FIG. 1 is a schematic structural view of a ring-type microchannel heat exchanger according to the present invention;
FIG. 2 is a schematic view of the structure of the lower cover plate of the present invention;
FIG. 3 is a schematic view of a U-shaped groove structure according to the present invention;
FIG. 4 is a schematic connection diagram of a fluid flow heat exchange experimental apparatus according to the present invention;
FIG. 5 is a schematic view of the diverter of the present invention;
fig. 6 is a schematic structural diagram of the junction station of the present invention.
Description of reference numerals:
1-base plate, 2-U-shaped groove, 3-upper cover plate, 4-lower cover plate, 5-channel, 6-primary flow channel, 7-secondary annular flow channel, 8-inclined flow channel, 9-collecting flow channel, 10-through hole, 11-peristaltic pump, 12-radiator, 13-liquid cooling tank, 14-liquid supply tank, 15-annular microchannel heat exchanger, 16-first check valve, 17-second check valve, 18-temperature collector, 19-pressure gauge, 20-flow divider, 21-flow combiner, 22-direct current power supply, 23-heat source, 24-first water inlet pipe, 25-first water outlet pipe, 26-second water inlet pipe, 27-second water outlet pipe and 28-pressure gauge connecting pipe.
Detailed Description
The following description of the embodiments of the present invention refers to the accompanying drawings and examples:
it should be noted that the structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are only for the purpose of understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined by the following claims, and any modifications of the structures, changes in the proportions and adjustments of the sizes, without affecting the efficacy and attainment of the same, are intended to fall within the scope of the present disclosure.
In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.
Example 1
As shown in fig. 1 ~ 2, the present invention discloses a ring-shaped microchannel heat exchanger, which includes a substrate 1 and two U-shaped grooves 2, wherein the two U-shaped grooves 2 are respectively clamped at two opposite sides of the substrate 1, the substrate 1 includes an upper cover plate 3 and a lower cover plate 4, wherein the lower cover plate 4 is provided with four channels 5, each channel 5 is composed of a primary channel 6, a secondary ring-shaped channel 7 and an inclined channel 8, wherein the primary channel 6 of each channel 5 is divided into two parts, the two parts of the primary channels 6 are respectively disposed at two ends of the lower cover plate 4, wherein the two parts of the primary channels 6 are connected with the secondary ring-shaped channel 7, wherein the plurality of inclined channels 8 are disposed in the middle region of the secondary ring-shaped channel 7, the upper cover plate 3 and the lower cover plate 4 are covered to make each channel 5 to be a closed independent space with openings at two ends, and wherein the straight lines of the four channels 5 are parallel to the straight lines connecting the two U-.
Example 2
As shown in fig. 1 ~ 2, the present invention discloses a ring-shaped microchannel heat exchanger, which includes a substrate 1 and two U-shaped grooves 2, wherein the two U-shaped grooves 2 are respectively clamped at two opposite sides of the substrate 1, the substrate 1 includes an upper cover plate 3 and a lower cover plate 4, wherein the lower cover plate 4 is provided with four channels 5, each channel 5 is composed of a primary channel 6, a secondary ring-shaped channel 7 and an inclined channel 8, wherein the primary channel 6 of each channel 5 is divided into two parts, the two parts of the primary channels 6 are respectively disposed at two ends of the lower cover plate 4, wherein the two parts of the primary channels 6 are connected with the secondary ring-shaped channel 7, wherein the plurality of inclined channels 8 are disposed in the middle region of the secondary ring-shaped channel 7, the upper cover plate 3 and the lower cover plate 4 are covered to make each channel 5 to be a closed independent space with openings at two ends, and wherein the straight lines of the four channels 5 are parallel to the straight lines connecting the two U-.
As shown in fig. 2, preferably, the four channels 5 are uniformly and mutually parallel arranged on the lower cover plate 4, wherein the primary flow channel 6 is a linear flow channel, the cross section of the secondary annular flow channel 7 is annular, two ends of the secondary annular flow channel 7 are respectively connected to two parts of the primary flow channel 6, the inclined flow channels 8 include two parts and are mutually crossed, and the number of the inclined flow channels 8 in each part is three and mutually parallel.
Example 3
As shown in fig. 1 ~ 2, the present invention discloses a ring-shaped microchannel heat exchanger, which includes a substrate 1 and two U-shaped grooves 2, wherein the two U-shaped grooves 2 are respectively clamped at two opposite sides of the substrate 1, the substrate 1 includes an upper cover plate 3 and a lower cover plate 4, wherein the lower cover plate 4 is provided with four channels 5, each channel 5 is composed of a primary channel 6, a secondary ring-shaped channel 7 and an inclined channel 8, wherein the primary channel 6 of each channel 5 is divided into two parts, the two parts of the primary channels 6 are respectively disposed at two ends of the lower cover plate 4, wherein the two parts of the primary channels 6 are connected with the secondary ring-shaped channel 7, wherein the plurality of inclined channels 8 are disposed in the middle region of the secondary ring-shaped channel 7, the upper cover plate 3 and the lower cover plate 4 are covered to make each channel 5 to be a closed independent space with openings at two ends, and wherein the straight lines of the four channels 5 are parallel to the straight lines connecting the two U-.
As shown in fig. 2, preferably, the four channels 5 are uniformly and mutually parallel arranged on the lower cover plate 4, wherein the primary flow channel 6 is a linear flow channel, the cross section of the secondary annular flow channel 7 is annular, two ends of the secondary annular flow channel 7 are respectively connected to two parts of the primary flow channel 6, the inclined flow channels 8 include two parts and are mutually crossed, and the number of the inclined flow channels 8 in each part is three and mutually parallel.
As shown in fig. 3, preferably, the U-shaped groove 2 is provided with four flow collecting grooves 9 and four through holes 10, the four flow collecting grooves 9 are respectively communicated with the four through holes 10, the four through holes 10 are arranged in parallel, two ends of the substrate 1 provided with the channel 5 can be in clamping butt joint with the flow collecting grooves 9, and one side of the U-shaped groove 2 is further provided with a pressure gauge connecting pipe 28.
As shown in fig. 3, preferably, a boss is provided inside the collecting groove 9, wherein grooves are provided at two ends of the substrate 1, and the boss inside the collecting groove 9 can be engaged with the groove of the substrate 1.
Example 4
As shown in fig. 1 ~ 2, the present invention discloses a ring-shaped microchannel heat exchanger, which includes a substrate 1 and two U-shaped grooves 2, wherein the two U-shaped grooves 2 are respectively clamped at two opposite sides of the substrate 1, the substrate 1 includes an upper cover plate 3 and a lower cover plate 4, wherein the lower cover plate 4 is provided with four channels 5, each channel 5 is composed of a primary channel 6, a secondary ring-shaped channel 7 and an inclined channel 8, wherein the primary channel 6 of each channel 5 is divided into two parts, the two parts of the primary channels 6 are respectively disposed at two ends of the lower cover plate 4, wherein the two parts of the primary channels 6 are connected with the secondary ring-shaped channel 7, wherein the plurality of inclined channels 8 are disposed in the middle region of the secondary ring-shaped channel 7, the upper cover plate 3 and the lower cover plate 4 are covered to make each channel 5 to be a closed independent space with openings at two ends, and wherein the straight lines of the four channels 5 are parallel to the straight lines connecting the two U-.
As shown in fig. 2, preferably, the four channels 5 are uniformly and mutually parallel arranged on the lower cover plate 4, wherein the primary flow channel 6 is a linear flow channel, the cross section of the secondary annular flow channel 7 is annular, two ends of the secondary annular flow channel 7 are respectively connected to two parts of the primary flow channel 6, the inclined flow channels 8 include two parts and are mutually crossed, and the number of the inclined flow channels 8 in each part is three and mutually parallel.
As shown in fig. 3, preferably, the U-shaped groove 2 is provided with four flow collecting grooves 9 and four through holes 10, the four flow collecting grooves 9 are respectively communicated with the four through holes 10, the four through holes 10 are arranged in parallel, two ends of the substrate 1 provided with the channel 5 can be in clamping butt joint with the flow collecting grooves 9, and one side of the U-shaped groove 2 is further provided with a pressure gauge connecting pipe 28.
As shown in fig. 3, preferably, a boss is provided inside the collecting groove 9, wherein grooves are provided at two ends of the substrate 1, and the boss inside the collecting groove 9 can be engaged with the groove of the substrate 1.
As shown in fig. 4, preferably, the experimental apparatus for testing fluid flow heat exchange of a loop type microchannel heat exchanger as described above comprises a peristaltic pump 11, a radiator 12, a liquid cooling tank 13, a liquid supply tank 14 and a test area, wherein the test area comprises a loop type microchannel heat exchanger 15, the peristaltic pump 11 is connected between the liquid supply tank 14 and the test area, the other end of the test area is connected with the radiator 12 through a pipeline, the other end of the radiator 12 is connected with the liquid cooling tank 13 through a pipeline, and the other end of the liquid cooling tank 13 is connected with the liquid supply tank 14 through a pipeline.
As shown in fig. 4, it is preferred to further include a stop valve, wherein the stop valve comprises a first stop valve 16 and a second stop valve 17, wherein the first stop valve 16 is disposed between the peristaltic pump 11 and the test zone, wherein the second stop valve 17 is disposed between the liquid cooling tank 13 and the liquid supply tank 14.
As shown in fig. 4, preferably, the test area further includes a temperature collector 18, a pressure gauge 19, an electric heating device, a shunt 20 and a junction station 21, wherein one end of the flow divider 20 is connected with the peristaltic pump 11 through a pipeline, the other end of the flow divider 20 is connected with the annular micro-channel heat exchanger 15 through a pipeline, wherein the other end of the ring-type micro-channel heat exchanger 15 is connected with a junction station 21 through a pipeline, the other end of the junction station 21 is connected with the radiator 12 through a pipeline, the electric heating device comprises a direct current power supply 22 and a heat source 23, wherein, the heat source 23 is connected with the direct current power supply 22, the heat source 23 is arranged on one end surface of the annular micro-channel heat exchanger 15, the temperature collector 18 is respectively connected with the inlet end and the outlet end of the annular microchannel heat exchanger 15, the heat source 24, the liquid cooling tank 13 and the liquid supply tank 14, the pressure gauges 19 are respectively connected to the inlet end and the outlet end of the annular microchannel heat exchanger 15.
Example 5
As shown in fig. 1 ~ 2, the present invention discloses a ring-shaped microchannel heat exchanger, which includes a substrate 1 and two U-shaped grooves 2, wherein the two U-shaped grooves 2 are respectively clamped at two opposite sides of the substrate 1, the substrate 1 includes an upper cover plate 3 and a lower cover plate 4, wherein the lower cover plate 4 is provided with four channels 5, each channel 5 is composed of a primary channel 6, a secondary ring-shaped channel 7 and an inclined channel 8, wherein the primary channel 6 of each channel 5 is divided into two parts, the two parts of the primary channels 6 are respectively disposed at two ends of the lower cover plate 4, wherein the two parts of the primary channels 6 are connected with the secondary ring-shaped channel 7, wherein the plurality of inclined channels 8 are disposed in the middle region of the secondary ring-shaped channel 7, the upper cover plate 3 and the lower cover plate 4 are covered to make each channel 5 to be a closed independent space with openings at two ends, and wherein the straight lines of the four channels 5 are parallel to the straight lines connecting the two U-.
As shown in fig. 2, preferably, the four channels 5 are uniformly and mutually parallel arranged on the lower cover plate 4, wherein the primary flow channel 6 is a linear flow channel, the cross section of the secondary annular flow channel 7 is annular, two ends of the secondary annular flow channel 7 are respectively connected to two parts of the primary flow channel 6, the inclined flow channels 8 include two parts and are mutually crossed, and the number of the inclined flow channels 8 in each part is three and mutually parallel.
As shown in fig. 3, preferably, the U-shaped groove 2 is provided with four flow collecting grooves 9 and four through holes 10, the four flow collecting grooves 9 are respectively communicated with the four through holes 10, the four through holes 10 are arranged in parallel, two ends of the substrate 1 provided with the channel 5 can be in clamping butt joint with the flow collecting grooves 9, and one side of the U-shaped groove 2 is further provided with a pressure gauge connecting pipe 28.
As shown in fig. 3, preferably, a boss is provided inside the collecting groove 9, wherein grooves are provided at two ends of the substrate 1, and the boss inside the collecting groove 9 can be engaged with the groove of the substrate 1.
As shown in fig. 4, preferably, the experimental apparatus for testing fluid flow heat exchange of a loop type microchannel heat exchanger as described above comprises a peristaltic pump 11, a radiator 12, a liquid cooling tank 13, a liquid supply tank 14 and a test area, wherein the test area comprises a loop type microchannel heat exchanger 15, the peristaltic pump 11 is connected between the liquid supply tank 14 and the test area, the other end of the test area is connected with the radiator 12 through a pipeline, the other end of the radiator 12 is connected with the liquid cooling tank 13 through a pipeline, and the other end of the liquid cooling tank 13 is connected with the liquid supply tank 14 through a pipeline.
As shown in fig. 4, it is preferred to further include a stop valve, wherein the stop valve comprises a first stop valve 16 and a second stop valve 17, wherein the first stop valve 16 is disposed between the peristaltic pump 11 and the test zone, wherein the second stop valve 17 is disposed between the liquid cooling tank 13 and the liquid supply tank 14.
As shown in fig. 4, preferably, the test area further includes a temperature collector 18, a pressure gauge 19, an electric heating device, a shunt 20 and a junction station 21, wherein one end of the flow divider 20 is connected with the peristaltic pump 11 through a pipeline, the other end of the flow divider 20 is connected with the annular micro-channel heat exchanger 15 through a pipeline, wherein the other end of the ring-type micro-channel heat exchanger 15 is connected with a junction station 21 through a pipeline, the other end of the junction station 21 is connected with the radiator 12 through a pipeline, the electric heating device comprises a direct current power supply 22 and a heat source 23, wherein, the heat source 23 is connected with the direct current power supply 22, the heat source 23 is arranged on one end surface of the annular micro-channel heat exchanger 15, the temperature collector 18 is respectively connected with the inlet end and the outlet end of the annular microchannel heat exchanger 15, the heat source 24, the liquid cooling tank 13 and the liquid supply tank 14, the pressure gauges 19 are respectively connected to the inlet end and the outlet end of the annular microchannel heat exchanger 15.
As shown in fig. 5, preferably, the flow divider 20 includes a first water inlet pipe 24 and a first water outlet pipe 25, wherein the first water inlet pipe 24 is communicated with the first water outlet pipe 25, the number of the first water inlet pipes 24 is one, the number of the first water outlet pipes 25 is four, the one first water inlet pipe 24 is connected to the peristaltic pump 11 through a pipeline, and the four first water outlet pipes 25 are respectively connected to the four through holes 10 of the U-shaped groove 2 of the annular microchannel heat exchanger 15.
As shown in fig. 6, preferably, the flow combiner includes a second water inlet pipe 26 and a second water outlet pipe 27, wherein the second water inlet pipe 26 is communicated with the second water outlet pipe 27, the number of the second water inlet pipes 26 is four, the number of the second water outlet pipes 27 is one, the four second water inlet pipes 26 are respectively connected to the four through holes 10 of the U-shaped groove 2 of the ring-shaped microchannel heat exchanger 15, and one of the second water outlet pipes 27 is connected to the radiator 12 through a pipeline.
Preferably, the heat source 23 is composed of a plurality of thin film resistors, wherein the heat source 23 is coated with an insulating material on each of the surfaces except the surface contacting with the annular microchannel heat exchanger.
The working principle of the invention is as follows:
the annular micro-channel heat exchanger 15 comprises a base plate 1 and a U-shaped groove 2, wherein a collecting groove 9 and a through hole 10 are processed on the U-shaped groove 2 for the inflow and outflow of cooling liquid, the base plate 1 consists of an upper cover plate 3 and a lower cover plate 4, four channels 5 are processed on the lower cover plate 4, each channel 5 consists of a primary flow channel 6, a secondary annular flow channel 7 and six inclined flow channels 8, the six inclined flow channels are mutually parallel and crossed in the middle area, the inclined flow channels 8 are mutually crossed to enable fluid to form turbulent flow at the crossed part, the heat exchange performance and the temperature equalization performance of the heat exchanger can be improved, four inlets and four outlets are formed at two ends of the four primary flow channels 6 of the annular micro-channel heat exchanger 15, a secondary annular flow channel 7 is arranged between each inlet and each outlet, the upper cover plate and the lower cover plate are welded, and a closed channel is.
The invention provides a fluid flow heat exchange experimental device for the annular microchannel heat exchanger, which comprises a peristaltic pump 11, a radiator 12, a liquid cooling tank 13, a liquid supply tank 14 and a test area, wherein the test area also comprises a temperature collector 18, a pressure gauge 19, an electric heating device, a flow divider 20 and a flow combiner 21, cooling liquid is divided into 4 branches by the flow divider 20 and flows into the annular microchannel heat exchanger 15 from 4 inlets, then flows out from 4 outlets of the flow combiner 21 and is combined into one branch to flow into the radiator 12, a liquid outlet of the liquid supply tank 14 is communicated with an inlet of the test area, an outlet of the test area is communicated with an inlet of the liquid cooling tank 13 through the radiator 12, a liquid outlet of the liquid cooling tank 13 is communicated with a liquid inlet of the liquid supply tank 14, the invention provides a method for the fluid to flow in and out of the annular microchannel heat exchanger 15 with multiple inlets and multiple outlets, and simultaneously the radiator 12 and the, the liquid temperature is rapidly reduced and it is ensured that the temperature drops to the inlet temperature, the cooling liquid is raised after passing through the microchannel heat exchanger 15 loaded with the heat source 23, it is dissipated a lot of heat by a matrix radiator 12, and then passed into the liquid cooling tank 13 to be cooled to the inlet temperature, and then passed through the second stop valve 17 into the liquid supply tank 14.
The cooling liquid in the liquid supply tank flows through the first stop valve under the drive of the peristaltic pump, is injected into the test area, flows into the annular micro-channel heat exchanger with the heat source from four inlets through the flow divider, flows out of the test area from four outlets through the flow combiner, flows to the liquid cooling tank through the radiator, and can flow into the liquid supply tank from the liquid cooling tank to realize circulation if the second stop valve is opened; in the process, the electric heating device is started to adjust the loaded heat flow density to a required value, after the pressure gauge and the temperature collector are stabilized, each temperature value and each pressure value can be read, the temperature of the cooling liquid can be increased after the cooling liquid passes through the annular micro-channel heat exchanger loaded with the heat source, most heat can be dissipated after the cooling liquid passes through the radiator, in order to ensure that the temperature of the cooling liquid is reduced to the inlet temperature, the fluid cooling tank of the fluid channel is used for measuring the temperature of the liquid in the fluid cooling tank, and after the temperature of the cooling liquid is reduced to the inlet temperature, the second check valve is started to enable the cooling liquid in the fluid cooling tank to flow into the fluid supply.
The test area of the invention adopts a heat source 23 to uniformly heat, a film resistor is used as an external heat source to measure the temperature of the inlet and the outlet of the annular micro-channel heat exchanger and the temperature of the heating surface of the annular micro-channel heat exchanger, the convection heat transfer coefficient of the annular micro-channel heat exchanger can be calculated according to the heat flux density provided by the heat source, the average temperature of a fluid inlet and a fluid outlet and the temperature of the heating surface of the annular micro-channel heat exchanger, and the pressure at two ends of the test section is measured by a pressure gauge to obtain the flow resistance parameter of the annular micro-channel.
The annular micro-channel heat exchanger is additionally provided with a pair of U-shaped grooves which are respectively and correspondingly arranged on two side surfaces of the annular micro-channel heat exchanger, a current collecting groove with the size identical to that of the annular micro-channel heat exchanger is processed on each U-shaped groove, bosses capable of performing positioning action with the heat exchanger are processed on two inner sides of each current collecting groove, grooves are formed in two ends of a base plate 1, the bosses on the inner sides of the current collecting grooves can be clamped in the grooves of the base plate 1, each inlet of the annular micro-channel heat exchanger is provided with a current collecting groove, each outlet of the annular micro-channel heat exchanger corresponds to one current collecting groove, and therefore four inlet current collecting grooves and four outlet current collecting.
The annular microchannel heat exchanger is characterized in that a heat source is loaded on the annular microchannel heat exchanger cover plate and provides required heat flux density for the annular microchannel heat exchanger, the heat source consists of a plurality of thin film resistors, heat is transferred to a heated surface of the microchannel through heat-conducting silica gel, the heat flux density can be controlled by the number of the thin film resistors on one hand and can be controlled by adjusting current on the other hand, and in order to reduce heat loss, the other 5 surfaces of the heat source except the surface in contact with the annular microchannel heat exchanger are wrapped with a layer of insulating material.
The temperature harvester needs to measure the temperature of 5 parts: the temperature of cooling liquid at the inlet of the annular microchannel heat exchanger, the temperature of cooling liquid at the outlet of the annular microchannel heat exchanger, the temperature of the heating surface of the annular microchannel heat exchanger, the temperature of cooling liquid in the liquid cooling tank and the temperature in the liquid supply tank are tested by adopting thermocouples, all the thermocouples are connected to a temperature collector, and the temperature value of each point can be displayed on the temperature collector.
The lower cover plate of the annular micro-channel heat exchanger comprises four channels, wherein each channel consists of a primary flow channel, a secondary annular flow channel and an inclined flow channel, the overall four channels are arranged in the same way, the liquid is uniformly distributed at a certain interval, the liquid flows into the inlet of the microchannel heat exchanger in the primary flow channel and then enters the annular secondary annular flow channel, the liquid flows towards two opposite directions, the liquid flows towards the inclined channel when entering the parallel secondary annular flow channel, the fluid at the two sides forms convection at the intersection of the inclined flow channels, the liquid in the furthest inclined flow channel flows back to the secondary annular flow channel and finally converges in the primary flow channel to flow out of the heat exchanger, the intersection of the inclined flow channels can improve the heat exchange performance and the temperature equalization performance of the heat exchanger, and the heat dissipation efficiency is high, the heat dissipation requirement of a high-load electronic device can be met, and a reliable temperature environment is provided for the electronic device.
The fluid flow heat exchange experimental device comprises a peristaltic pump, a radiator, a liquid cooling box, a liquid supply box and a test area, wherein the test area comprises an annular micro-channel heat exchanger, the peristaltic pump is connected between the liquid supply box and the test area, the other end of the test area is connected with the radiator through a pipeline, the other end of the radiator is connected with the liquid cooling box through a pipeline, the other end of the liquid cooling box is connected with the liquid supply box through a pipeline, the test area further comprises a temperature collector, a pressure gauge, an electric heating device, a flow divider and a confluence device, and the fluid flow heat exchange experimental device can quickly detect the heat exchange effect of the heat exchanger; the annular micro-channel heat exchanger and the fluid flow heat exchange experimental device have the advantages of simple structure, convenience in operation and low cost, and the working efficiency is greatly improved.
Although the preferred embodiments of the present invention have been described in detail with reference to the accompanying drawings, the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the spirit of the present invention.
Many other changes and modifications can be made without departing from the spirit and scope of the invention. It is to be understood that the invention is not to be limited to the specific embodiments, but only by the scope of the appended claims.
Claims (7)
1. An annular microchannel heat exchanger, its characterized in that: the device comprises a substrate and two U-shaped grooves, wherein the two U-shaped grooves are respectively clamped on two opposite sides of the substrate, the substrate comprises an upper cover plate and a lower cover plate, the lower cover plate is provided with four channels, each channel consists of a first-stage flow channel, a second-stage annular flow channel and an inclined flow channel, the first-stage flow channel of each channel is divided into two parts, the two first-stage flow channels are respectively arranged at two ends of the lower cover plate, the second-stage annular flow channel is connected between the two first-stage flow channels, a plurality of inclined flow channels are arranged in the middle area of the second-stage annular flow channel, each channel can become a closed independent space with openings at two ends by covering the upper cover plate and the lower cover plate, the straight lines where the four channels are located are parallel to the straight lines where the two U-shaped grooves are connected, the four channels are uniformly and mutually parallel, the cross-section of second grade ring type runner is the annular, and wherein two parts of one-level runner are connected respectively at second grade ring type runner both ends, the slope runner includes two parts and intercrossing sets up, and wherein every partial slope runner number is three and be parallel to each other, U type groove is equipped with collection groove and through-hole, and wherein the number of through-hole is four, collection groove is linked together with four through-holes respectively, and wherein four through-holes are parallel to each other, the both ends that the base plate was equipped with the passageway can dock with the mass flow groove joint, U type groove one side still is equipped with the pressure gauge connecting pipe, the mass flow inslot side is equipped with the boss, and wherein the base plate both ends are equipped with the recess, the inboard boss in mass flow ins.
2. A fluid flow heat exchange experimental apparatus for testing the ring-type microchannel heat exchanger of claim 1, wherein: the testing device comprises a peristaltic pump, a radiator, a liquid cooling box, a liquid supply box and a testing area, wherein the testing area comprises a ring-shaped micro-channel heat exchanger, the peristaltic pump is connected between the liquid supply box and the testing area, the other end of the testing area is connected with the radiator through a pipeline, the other end of the radiator is connected with the liquid cooling box through a pipeline, and the other end of the liquid cooling box is connected with the liquid supply box through a pipeline.
3. The fluid flow heat exchange experimental facility for testing the ring-type microchannel heat exchanger as claimed in claim 2, wherein: the testing device also comprises a check valve, wherein the check valve comprises a first check valve and a second check valve, the first check valve is arranged between the peristaltic pump and the testing area, and the second check valve is arranged between the liquid cooling tank and the liquid supply tank.
4. The fluid flow heat exchange experimental facility for testing the ring-type microchannel heat exchanger as claimed in claim 2, wherein: the testing area further comprises a temperature collector, a pressure gauge, an electric heating device, a flow divider and a flow converging device, wherein one end of the flow divider is connected with a peristaltic pump through a pipeline, the other end of the flow divider is connected with a ring-shaped micro-channel heat exchanger through a pipeline, the other end of the ring-shaped micro-channel heat exchanger is connected with the flow converging device through a pipeline, the other end of the flow converging device is connected with a radiator through a pipeline, the electric heating device comprises a direct current power source and a heat source, the heat source is connected with the direct current power source, the heat source is arranged on one end face of the ring-shaped micro-channel heat exchanger, the temperature collector is respectively connected with an inlet end and an outlet end of the ring-shaped micro-.
5. The fluid flow heat exchange experimental facility for testing the ring type microchannel heat exchanger as claimed in claim 4, wherein: the flow divider comprises a first water inlet pipe and a first water outlet pipe, wherein the first water inlet pipe is communicated with the first water outlet pipe, the number of the first water inlet pipe is four, the first water inlet pipe is connected with the peristaltic pump through a pipeline, and the four first water outlet pipes are respectively connected with four through holes of a U-shaped groove of the annular micro-channel heat exchanger.
6. The fluid flow heat exchange experimental facility for testing the ring type microchannel heat exchanger as claimed in claim 4, wherein: the flow combiner comprises a second water inlet pipe and a second water outlet pipe, wherein the second water inlet pipe is communicated with the second water outlet pipe, the number of the second water inlet pipes is four, the number of the second water outlet pipes is one, the four second water inlet pipes are respectively connected with four through holes of a U-shaped groove of the annular micro-channel heat exchanger, and one of the second water outlet pipes is connected with the radiator through a pipeline.
7. The fluid flow heat exchange experimental facility for testing the ring type microchannel heat exchanger as claimed in claim 4, wherein: the heat source is composed of a plurality of thin film resistors, wherein insulating materials are wrapped on all the surfaces of the heat source except the surface which is in contact with the annular micro-channel heat exchanger.
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| CN110161077B (en) * | 2019-06-10 | 2021-08-06 | 衢州学院 | Method for detecting convection heat transfer coefficient of flow channel surface |
| CN110534491B (en) * | 2019-08-01 | 2021-01-29 | 西安电子科技大学 | L-shaped multi-channel heat exchanger and fluid flow heat exchange detection method thereof |
| CN110763496A (en) * | 2019-10-12 | 2020-02-07 | 西安电子科技大学 | Lithium battery channel heat exchanger detection device and heat exchange method |
| CN113514491A (en) * | 2021-04-20 | 2021-10-19 | 中国电子科技集团公司第二十研究所 | Bionic topology microchannel heat exchanger and fluid heat exchange experimental system thereof |
| CN113410194B (en) * | 2021-06-15 | 2023-06-13 | 西安微电子技术研究所 | M-type micro-channel heat exchanger based on composite phase change material, detection device and detection method |
| CN114441200A (en) * | 2021-06-30 | 2022-05-06 | 中国电子科技集团公司第三十八研究所 | Staggered inlet-outlet topological structure heat exchanger and fluid flow heat exchange experimental device |
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| CN201352077Y (en) * | 2008-12-26 | 2009-11-25 | 艾默生网络能源有限公司 | Liquid cooling radiator |
| CN102159058B (en) * | 2011-03-18 | 2013-10-09 | 致茂电子(苏州)有限公司 | Liquid-cooled radiation structure |
| CN103533815A (en) * | 2013-10-29 | 2014-01-22 | 中国北车集团大连机车研究所有限公司 | Modular rapidly-formed water-cooling plate |
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| CN204090418U (en) * | 2014-09-16 | 2015-01-07 | 浙江银轮机械股份有限公司 | A kind of sealing strip type liquid cooling plate |
| CN104658992A (en) * | 2015-02-13 | 2015-05-27 | 西安电子科技大学 | Novel micro heat sink provided with pin-fin array |
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| JP6569514B2 (en) * | 2015-12-22 | 2019-09-04 | 富士通株式会社 | Heat receiver, cooling unit and electronic device |
| CN106679460B (en) * | 2016-11-18 | 2018-07-17 | 华北电力大学（保定） | A kind of micro-channel heat exchanger |
| CN106879227B (en) * | 2017-01-23 | 2018-10-16 | 西安电子科技大学 | A kind of micro-channel heat exchanger and fluid interchange experimental provision |
| CN108633233B (en) * | 2018-06-29 | 2024-04-30 | 苏州汇川技术有限公司 | Liquid cooling radiator and power electronic equipment |
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