CN113329595A - Targeted temperature control electrostatic spray cooling device and method thereof - Google Patents

Targeted temperature control electrostatic spray cooling device and method thereof Download PDF

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Publication number
CN113329595A
CN113329595A CN202110551596.4A CN202110551596A CN113329595A CN 113329595 A CN113329595 A CN 113329595A CN 202110551596 A CN202110551596 A CN 202110551596A CN 113329595 A CN113329595 A CN 113329595A
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heat sink
electrostatic
liquid
temperature
flow valve
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CN202110551596.4A
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CN113329595B (en
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许浩洁
王军锋
赵天岳
张闫
李步发
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Jiangsu University
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Jiangsu University
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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
    • H05K7/20381—Thermal management, e.g. evaporation control
    • 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
    • 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
    • H05K7/20318—Condensers
    • 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
    • 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
    • H05K7/20345—Sprayers; Atomizers
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
    • Y02P70/10—Greenhouse gas [GHG] capture, material saving, heat recovery or other energy efficient measures, e.g. motor control, characterised by manufacturing processes, e.g. for rolling metal or metal working

Abstract

The invention provides a targeted temperature control electrostatic spray cooling device and a method thereof, wherein the device comprises a liquid storage tank, a liquid supply pump, a first flow valve, a heat exchanger, a second flow valve, a spray head, an electrostatic spray cavity, a high-voltage electrostatic generator, a condenser, a temperature relay and a controller; the high-voltage electrostatic generator is connected with the spray head, a heat sink is arranged in the electrostatic spray cavity and is isolated by an insulating isolation belt to form a plurality of heat sink units, and temperature measuring thermocouples are arranged below the heat sink units; a liquid drainage groove is formed between the insulating isolation belt and the heat sink unit; a thermocouple of the heat sink is connected with the temperature relay and is grounded; the controller is respectively connected with the high-voltage electrostatic generator, the temperature relay and the second flow valve. The device can realize targeted and accurate cooling in the spraying process, process the temperature signal of the surface of the heat sink through the temperature relay and the controller, and automatically adjust the electrical parameter and the flow parameter by controlling the high-voltage electrostatic generator and the flow valve so as to meet the requirements of different cooling working conditions.

Description

Targeted temperature control electrostatic spray cooling device and method thereof
Technical Field
The invention belongs to the technical field of thermal management of high-performance electronic components, and particularly relates to an accurate targeted cooling device based on an electrostatic atomization technology.
Background
With the increasing performance of electronic devices, the thermal management problem is facing a serious threat, which puts higher demands on the cooling system. Among numerous cooling technologies, spray cooling is widely applied to temperature control processes in the fields of metallurgy, energy, chemical engineering, electronic equipment, medical engineering and the like because of the advantages of strong heat exchange capacity, high working medium utilization rate, good cooling uniformity and the like.
The spray cooling specifically refers to a high-efficiency heat exchange process that a liquid working medium is atomized into a large number of small droplets after being sprayed and pressurized and is quickly sprayed to a heating surface, and a cooling mechanism mainly comprises droplet beating heat exchange, liquid film scouring heat exchange, liquid evaporation heat exchange, boiling bubble heat exchange and heat exchange with the surrounding environment. The existing research shows that the spray cooling process using water as working medium can realize 1200W/cm2The ultrahigh heat flow density is used for heat dissipation, and is expected to become a key technology for solving the cooling problem of high-power electronic components in the future. However, the existing spray cooling system usually includes a liquid storage tank, a pressure pump, a spray chamber, a condenser and the like, which not only occupies a large area, but also the spray often needs a large back pressure for atomization, and meanwhile, the monodispersion of liquid drops is poor, and the deposition uniformity is difficult to ensure. The series of problems seriously restrict the further development of the spray cooling technology to high efficiency, precision and light weight.
Disclosure of Invention
In order to solve the technical problems, the invention provides a targeted temperature control electrostatic spray cooling device and a method thereof. In addition, the targeted and accurate cooling in the spraying process can be realized by carrying out unitized structure division on the heat sink, matching with the real-time monitoring of the thermocouple on the local temperature information and utilizing the potential difference formed between the spray head and the heat sink. The temperature relay and the controller are used for processing the heat sink surface temperature signal, and the device can automatically adjust the electrical parameters and the flow parameters by controlling the high-voltage electrostatic generator and the flow valve so as to meet the requirements of different cooling working conditions.
The technical scheme adopted by the invention for solving the technical problems is as follows: a targeted temperature control electrostatic spray cooling device comprises a liquid storage tank, a liquid supply pump, a first flow valve, a heat exchanger, a second flow valve, a spray head, an electrostatic spray cavity, a high-voltage electrostatic generator, a condenser, a temperature relay and a controller; the liquid storage tank is connected with the electrostatic spraying cavity through a liquid supply pipeline, and the liquid storage tank is lower than the electrostatic spraying cavity; the liquid supply pump, the first flow valve, the heat exchanger, the second flow valve and the spray head are sequentially arranged on a liquid supply pipeline between the liquid storage tank and the electrostatic spraying cavity along the liquid flowing direction; the spray head is arranged at the top of the electrostatic spraying cavity; the bottom of the electrostatic spraying cavity is connected with the liquid storage tank through a liquid phase working medium recovery pipeline; the top of the electrostatic spraying cavity is also connected with the liquid storage tank through a gas phase working medium recovery pipeline; the condenser is arranged on the gas phase working medium recovery pipeline; the high-voltage electrostatic generator is connected with the spray head, a heat sink is arranged in the electrostatic spray cavity, the heat sink is isolated by an insulating isolation belt to form a plurality of heat sink units, and temperature measuring thermocouples are arranged below the heat sink units; a liquid drainage groove is formed between the insulating isolation belt and the heat sink unit; a thermocouple of the heat sink is connected with the temperature relay and is grounded; and the controller is respectively connected with the high-voltage electrostatic generator, the temperature relay and the second flow valve.
In the scheme, the device further comprises a filter; the filter is mounted on the supply line between the first flow valve and the heat exchanger.
In the above scheme, the liquid storage tank is made of an insulating material.
In the above scheme, the liquid supply pump is a peristaltic pump.
In the above scheme, the nozzle is made of metal material, and the straight range of the nozzle hole is 100-.
In the scheme, the distance between the spray head and the surface of the heat sink is 10-30 mm.
In the above scheme, the maximum diameter of the heat sink surface is not more than 30 mm.
In the scheme, the filling height of the insulating isolation belt is 3-5mm lower than the upper surface of the heat sink unit so as to form a liquid drainage groove for recovering cooling working media.
A control method of the electrostatic spray cooling device with the targeted temperature control function comprises the following steps:
adding a cooling working medium into the liquid storage tank, opening a liquid supply pump switch, enabling the cooling working medium to enter a heat exchanger for preheating, and keeping a second flow valve in a closed state;
connecting the heat sink at the bottom of the electrostatic spray cavity with a cooling surface, turning on a temperature relay and a controller, and setting a temperature signal threshold;
when the surface temperature of the local heat sink unit rises to reach the set temperature threshold, the temperature relay performs grounding treatment on the heat sink unit corresponding to the overheating area, meanwhile, the temperature signal is transmitted to the controller, the controller controls the high-voltage electrostatic generator and the second flow valve to be opened, a local electric field is formed between the high-voltage spray head and the overheating heat sink unit, the spraying direction is controlled, and targeted spraying cooling is performed on the area;
the liquid working medium on the surface of the heat sink is collected downwards through a liquid discharge groove and flows back to the liquid storage tank through a liquid working medium recovery pipeline; the working medium steam upwards enters a gas-phase working medium recovery pipeline, is condensed by a condenser and then flows back to the liquid storage tank;
when the temperature of the surface of the heat sink drops to a certain critical value, the controller controls to close the high-voltage electrostatic generator and the second flow valve.
In the above scheme, the controller controls the voltage of the high-voltage electrostatic generator and the flow of the second flow valve according to the overheating degree condition of the surface of the heat sink detected by the temperature relay, so that the overheating area is accurately cooled, and the waste of the cooling working medium is avoided.
Compared with the prior art, the invention has the beneficial effects that: the invention atomizes the cooling working medium by adopting a mode of externally adding high-voltage static electricity, and greatly saves the energy consumption required by atomization compared with mechanical and pressure atomization modes; high-voltage static electricity is directly connected with a metal spray head to form a contact type charged structure, the surface tension of a cooling working medium can be effectively weakened through the electrostatic action, so that the liquid crushing is promoted, and the spray form can be adjusted through changing the voltage to meet the requirements of different cooling working conditions; meanwhile, real-time temperature monitoring is arranged on the surface of the heat sink, the coordinate position of the overheating area is obtained through a temperature relay and a controller, accurate target cooling of the overheating area is achieved by comprehensively regulating and controlling flow parameters and electric parameters, and the working medium utilization rate is fully improved.
Drawings
FIG. 1 is a schematic view of an electrostatic spray cooling device capable of achieving precise target temperature control according to the present invention;
FIG. 2 is a top view of a heat sink unitization scheme of one embodiment of the present invention;
fig. 3 is a front view of a heat sink unitization scheme of one embodiment of the present invention.
In the figure: 1. a liquid storage tank; 2. a liquid supply pump; 3. a first flow valve; 4. a filter; 5. a heat exchanger; 6. a second flow valve; 7. a spray head; 8. an electrostatic spray chamber; 9. a high voltage electrostatic generator; 10. a controller; 11. a temperature relay; 12. a condenser; 13 heat sink; 13-1. a heat sink unit; 13-2, insulating isolation belts; 13-3, a liquid drainage groove; 13-4, thermocouple.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "axial," "radial," "vertical," "horizontal," "inner," "outer," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present invention and for simplicity in description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting. Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Fig. 1 shows a preferred embodiment of the targeted temperature control electrostatic spray cooling device according to the present invention, which includes a liquid storage tank 1, a liquid supply pump 2, a first flow valve 3, a heat exchanger 5, a second flow valve 6, a spray head 7, an electrostatic spray cavity 8, a high-voltage electrostatic generator 9, a condenser 12, a temperature relay 11, and a controller 10; the liquid storage tank 1 is connected with the electrostatic spraying cavity 8 through a liquid supply pipeline, and the liquid storage tank 1 is lower than the electrostatic spraying cavity 8; the liquid supply pump 2, the first flow valve 3, the heat exchanger 5, the second flow valve 6 and the spray head 7 are sequentially arranged on a liquid supply pipeline between the liquid storage tank 1 and the electrostatic spraying cavity 8 along the liquid flowing direction; the spray head 7 is arranged at the top of the electrostatic spraying cavity 8; the bottom of the electrostatic spraying cavity 8 is connected with the liquid storage tank 1 through a liquid phase working medium recovery pipeline; the top of the electrostatic spraying cavity 8 is also connected with the liquid storage tank 1 through a gas phase working medium recovery pipeline; the condenser 12 is arranged on the gas phase working medium recovery pipeline; the high-voltage electrostatic generator 9 is connected with the spray head 7, a heat sink 13 is arranged in the electrostatic spray cavity 8, the heat sink 13 is isolated by an insulating isolation belt 13-2 to form a plurality of heat sink units 13-1, and temperature measuring thermocouples 13-4 are arranged below the heat sink units 13-1; a liquid drainage groove 13-3 is formed between the insulating isolation belt 13-2 and the heat sink unit 13-1; a thermocouple 13-4 of the heat sink 13 is connected with the temperature relay 11 and is grounded; the controller 10 is respectively connected with the high-voltage electrostatic generator 9, the temperature relay 11 and the second flow valve 6.
The first flow valve 3 is used for adjusting liquid supply flow, the filter 4 is used for preventing a liquid supply pipeline from being blocked, the heat exchanger 5 is arranged at a liquid inlet of the electrostatic spraying cavity 8 and used for adjusting the initial temperature of a cooling working medium, and the condenser 12 is arranged in a cooling gas-phase working medium recovery pipeline and used for condensing and recovering superheated working medium steam in the electrostatic spraying cavity 8.
The high-voltage electrostatic generator 9 is connected with the metal capillary spray head 7 to form a contact type charge structure, liquid working media are quickly sprayed to the surface of the heat sink in a spray mode under the action of potential difference to achieve the purpose of cooling, the surface of the heat sink 13 is divided into units, the heat sink 13 is separated by heat insulation and insulation materials, and thermocouples 13-4 temperature measuring points are arranged below each heat sink unit area to monitor the temperature distribution condition of the surface of the heat sink in real time.
The temperature relay 11 controls the start and stop of the device operation through the controller 10 by monitoring the surface temperature of the heat sink 13, and further adjusts the flow rate of the working medium and the magnitude of the external voltage, wherein the temperature relay 11 can obtain the temperature information of the local heat sink, and forms a local electric field by grounding the local heat sink unit area so as to control the spraying direction, thereby realizing the accurate and targeted cooling of the overheating area.
The liquid storage tank 1 needs to be subjected to electrostatic insulation treatment. The cooling working medium is dielectric liquid. The heat exchanger 5 is arranged in the liquid supply pipeline, and the temperature can be adjusted. The liquid supply pump 2 is a peristaltic pump, only needs to supply quantitative liquid, does not generate pressure, and can greatly save energy consumption compared with a pressure pump; meanwhile, the peristaltic pump can avoid the direct contact of the working medium and the pump body, and the stability of the electrostatic spraying of the working medium is ensured.
According to the embodiment, preferably, the nozzle is made of metal, and the straight range of the nozzle is 100-400 μm; the distance between the spray head and the surface of the heat sink is 10-30 mm; the maximum diameter of the surface of the heat sink is not more than 30mm, and the range of the parameters is favorable for ensuring the effect of electrostatic spray cooling.
The liquid storage tank 1 is filled with a cooling working medium which is made of an insulating material and is placed at a position lower than the electrostatic spraying cavity 8 for supplying and recycling the cooling working medium; the liquid supply pump 2 is a peristaltic pump, can accurately adjust the liquid supply flow, is used as the only power source for conveying the liquid working medium, and avoids the direct contact between the pump body and the cooling working medium; the filter 4 is arranged in the liquid supply pipeline and is used for preventing solid impurities in the pipeline from blocking the heat exchanger 5 and the atomizing nozzle 7; the heat exchanger 5 is used for controlling the initial temperature of the spray cooling working medium and ensuring accurate heat exchange in the spray cooling process; the spray head 7 is connected with a high-voltage electrostatic generator 9, preferably, 0-30kV high voltage can be generated, meanwhile, the heat sink 13 is grounded, and then a high-voltage electrostatic field is formed between the spray head 7 and the heat sink 13 to drive the electrostatic spray cooling process to be carried out; the thermoelectric couple 13-4 is arranged below the heat sink 13 and can reflect the surface temperature distribution of the heat sink in real time, the thermoelectric couple 13-4 is connected with the temperature relay 11, the surface temperature signal of the heat sink 13 is transmitted to the controller 10 through the temperature relay 11, the controller 10 is connected with the high-voltage electrostatic generator 9 and the second flow valve 6, and the high-voltage electrostatic generator 9 and the second flow valve 6 are controlled to adjust the electrical parameters and the flow parameters according to the obtained surface temperature information of the heat sink 13 so as to meet the requirements of different cooling working conditions and utilize cooling working media to the maximum extent.
As shown in fig. 2 and 3, the heat sinks 13 are separated by insulating isolation strips 13-2 and are divided into units, the heat sink units 13-1 are made of high thermal conductivity metal materials, and the adjacent heat sink units 13-1 are in an insulating and heat-insulating state; thermocouples 13-4 are arranged below each heat sink unit 13-1, the temperature distribution condition of the whole heat sink can be fed back in real time, and a local electric field is formed between the spray head 7 and the overheating heat sink unit 13-1 under the action of the temperature relay 11 and the controller 10, so that accurate targeted cooling of a specific area is realized under the action of electrostatic force.
The structural front view of the heat sink 13 is shown in fig. 3, particularly, the upper surface of the insulating isolation belt 13-2 is slightly lower than that of the heat sink unit 13-1, a liquid drainage groove 13-3 is formed on the spray cooling heat exchange surface and used for recovering liquid drainage of a cooling working medium in the cooling process, and the liquid drainage groove 13-3 can effectively reduce a large amount of liquid accumulation on the heat exchange surface at the same time, so that the spray cooling heat exchange efficiency is improved.
The electrostatic spraying cavity 8 is provided with three pipelines to realize the recycling of cooling working media, a liquid supply pipeline is connected with the spray head 7 to supply liquid required by electrostatic spraying, the bottom of the electrostatic spraying cavity 8 is provided with a backflow channel to be connected with the liquid storage tank 1, and the liquid phase working media are recovered under the action of gravity; meanwhile, a gas phase working medium recovery pipeline is arranged on the side edge of the top of the electrostatic spraying cavity 8, a condenser 12 is arranged in the gas phase working medium recovery pipeline and then connected to the liquid storage tank 1, in the spraying and cooling process, the cooling working medium is heated and evaporated in the electrostatic spraying cavity 8, so that the pressure in the electrostatic spraying cavity 8 is increased, and working medium steam is condensed and recovered to the liquid storage tank 1 through the condenser 12 under the action of pressure difference, so that the use cycle of the cooling working medium is formed.
The control method of the targeted temperature control electrostatic spray cooling device comprises the following steps:
adding a certain amount of cooling working medium into the liquid storage tank 1 to ensure the stable operation of a circulating pipeline, and simultaneously turning on a switch of a liquid supply pump 2 to enable the cooling working medium to enter a heat exchanger 5 for preheating and keep a flow valve 6 in a closed state;
connecting and bonding a heat sink 13 at the bottom of the electrostatic spraying cavity 8 with a cooling surface through heat-conducting silicone grease, turning on a temperature relay 11 and a controller 10, and setting a temperature signal threshold;
when the surface temperature of the local heat sink unit 13-1 rises to reach the set temperature threshold, the temperature relay 11 immediately performs grounding treatment on the heat sink unit 13-1 corresponding to the overheated area, and simultaneously controls the high-voltage electrostatic generator 9 and the second flow valve 6 to be opened through the controller 10, so that a local electric field is formed between the high-voltage spray head 7 and the overheated heat sink unit 13-1, the spraying direction is controlled, and targeted spraying cooling is performed on the area.
Furthermore, according to the condition of the surface overheating degree of the heat sink 13, the controller 10 can control and adjust the applied voltage and the flow rate of the working medium, and realize accurate cooling of the overheating area, thereby avoiding the waste of the cooling working medium.
The liquid working medium on the surface of the heat sink 13 is collected downwards through a liquid discharge groove 13-3 and flows back to the liquid storage tank 1 through a recovery pipeline; the working medium steam upwards enters a recovery pipeline, is condensed by a condenser 12 and then also flows back to the liquid storage tank 1;
when the surface temperature of the heat sink 13 drops to a certain critical value along with the progress of the spray cooling process, the temperature relay 11 and the controller 10 control to close the high-voltage electrostatic generator 9 and the second flow valve 6;
therefore, the spray cooling device can be controlled to start and stop and adjusted in operation parameters by monitoring the surface temperature information of the heat sink in real time, and accurate targeted cooling is realized.
The targeted temperature control electrostatic spray cooling device is particularly suitable for cooling high-power precise electronic components, and has the advantages of small volume, low energy consumption and precise temperature control; meanwhile, the contact type electrostatic atomization can crush the cooling working medium to form micron-sized fine spray, so that the spray quality is improved, and the cooling heat exchange efficiency is improved; the automatic control unit increases the controllability and flexibility of the whole device; the invention realizes efficient, precise and light spray cooling by utilizing the electrostatic atomization technology and matching with an automatic control and working medium circulation scheme.
It should be understood that although the present description has been described in terms of various embodiments, not every embodiment includes only a single embodiment, and such description is for clarity purposes only, and those skilled in the art will recognize that the embodiments described herein may be combined as suitable to form other embodiments, as will be appreciated by those skilled in the art.
The above-listed detailed description is only a specific description of a possible embodiment of the present invention, and they are not intended to limit the scope of the present invention, and equivalent embodiments or modifications made without departing from the technical spirit of the present invention should be included in the scope of the present invention.

Claims (10)

1. A targeted temperature control electrostatic spray cooling device is characterized by comprising a liquid storage tank (1), a liquid supply pump (2), a first flow valve (3), a heat exchanger (5), a second flow valve (6), a spray head (7), an electrostatic spray cavity (8), a high-voltage electrostatic generator (9), a condenser (12), a temperature relay (11) and a controller (10);
the liquid storage tank (1) is connected with the electrostatic spraying cavity (8) through a liquid supply pipeline, and the liquid storage tank (1) is lower than the electrostatic spraying cavity (8); the liquid supply pump (2), the first flow valve (3), the heat exchanger (5), the second flow valve (6) and the spray head (7) are sequentially arranged on a liquid supply pipeline between the liquid storage tank (1) and the electrostatic spray cavity (8) along the liquid flowing direction; the spray head (7) is arranged at the top of the electrostatic spraying cavity (8); the bottom of the electrostatic spraying cavity (8) is connected with the liquid storage tank (1) through a liquid phase working medium recovery pipeline; the top of the electrostatic spraying cavity (8) is also connected with the liquid storage tank (1) through a gas phase working medium recovery pipeline; the condenser (12) is arranged on the gas phase working medium recovery pipeline;
the high-voltage electrostatic generator (9) is connected with the spray head (7), a heat sink (13) is arranged in the electrostatic spray cavity (8), the heat sink (13) is isolated by an insulating isolation belt (13-2) to form a plurality of heat sink units (13-1), and temperature measuring thermocouples (13-4) are arranged below the heat sink units (13-1); a liquid drainage groove (13-3) is formed between the insulating isolation belt (13-2) and the heat sink unit (13-1); a thermocouple (13-4) of the heat sink (13) is connected with the temperature relay (11) and is grounded;
and the controller (10) is respectively connected with the high-voltage electrostatic generator (9), the temperature relay (11) and the second flow valve (6).
2. The targeted temperature controlled electrostatic spray cooling device according to claim 1, further comprising a filter (4); the filter (4) is arranged on the liquid supply pipeline and is positioned between the first flow valve (3) and the heat exchanger (5).
3. An electrostatic spray cooling device according to claim 1, wherein the reservoir (1) is of an insulating material.
4. An electrostatic spray cooling device according to claim 1, wherein the liquid supply pump (2) is a peristaltic pump.
5. An electrostatic spray cooling device according to claim 1, wherein the nozzle (7) is made of metal, and the range of the straight nozzle is 100-400 μm.
6. An electrostatic spray cooling device according to claim 1, wherein the distance between the spray head (7) and the surface of the heat sink (13) is in the range of 10-30 mm.
7. An electrostatic spray cooling device according to claim 1, wherein the heat sink (13) surface maximum diameter does not exceed 30 mm.
8. An electrostatic spray cooling device according to claim 1, wherein the insulating isolation strip (13-2) has a filling height of 3-5mm below the upper surface of the heat sink unit (13-1) to form a drainage channel (13-3).
9. A method for controlling a targeted temperature controlled electrostatic spray cooling device according to any one of claims 1 to 8, comprising the steps of:
adding a cooling working medium into the liquid storage tank (1), opening a switch of the liquid supply pump (2), enabling the cooling working medium to enter a heat exchanger (5) for preheating, and keeping a second flow valve (6) in a closed state; connecting a heat sink (13) at the bottom of the electrostatic spraying cavity (8) with a cooling surface;
when the surface temperature of the local heat sink unit (13-1) rises to reach a set temperature threshold, the temperature relay (11) performs grounding treatment on the heat sink unit (13-1) corresponding to the overheating area, simultaneously transmits a temperature signal to the controller (10), and controls the high-voltage electrostatic generator (9) and the second flow valve (6) to be opened through the controller (10), so that a local electric field is formed between the high-voltage spray head (7) and the overheating heat sink unit (13-1), the spraying direction is controlled, and targeted spraying cooling is performed on the area;
liquid working media on the surface of the heat sink (13) are collected downwards through a liquid discharge groove (13-3) and flow back to the liquid storage tank (1) through a liquid working medium recovery pipeline; the working medium steam upwards enters a gas phase working medium recovery pipeline, is condensed by a condenser (12) and then flows back to the liquid storage tank (1);
when the surface temperature of the heat sink (13) is reduced to a certain critical value, the controller (10) controls the high-voltage electrostatic generator (9) and the second flow valve (6) to be closed.
10. The control method of the targeted temperature control electrostatic spray cooling device according to claim 9, characterized in that the controller (10) controls the voltage of the high voltage electrostatic generator (9) and the flow rate of the second flow valve (6) according to the overheating condition of the surface of the heat sink (13) detected by the temperature relay (11).
CN202110551596.4A 2021-05-20 2021-05-20 Targeted temperature control electrostatic spray cooling device and method thereof Active CN113329595B (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115014115A (en) * 2022-03-31 2022-09-06 武汉大学 Method for controlling liquid drops to cool overheated surface based on ion wind

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108144758A (en) * 2017-12-26 2018-06-12 中国科学院工程热物理研究所 Spray cooling device based on electrostatic atomization
CN108452964A (en) * 2018-05-17 2018-08-28 江苏大学 A kind of electrostatic atomization cooling system for high heat flux density surface
CN110508088A (en) * 2019-07-29 2019-11-29 江苏大学 A kind of chimney exhaust gas using electrostatic technique takes off white device
CN111540716A (en) * 2020-07-13 2020-08-14 常州江苏大学工程技术研究院 Electrostatic flash evaporation micro-spray circulating cooling system for heat dissipation of high-power chip

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108144758A (en) * 2017-12-26 2018-06-12 中国科学院工程热物理研究所 Spray cooling device based on electrostatic atomization
CN108452964A (en) * 2018-05-17 2018-08-28 江苏大学 A kind of electrostatic atomization cooling system for high heat flux density surface
CN110508088A (en) * 2019-07-29 2019-11-29 江苏大学 A kind of chimney exhaust gas using electrostatic technique takes off white device
CN111540716A (en) * 2020-07-13 2020-08-14 常州江苏大学工程技术研究院 Electrostatic flash evaporation micro-spray circulating cooling system for heat dissipation of high-power chip

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
许浩洁 等: "不同雾化模式下乙醇静电喷雾冷却换热特性", 《工程热物理学报》 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN115014115A (en) * 2022-03-31 2022-09-06 武汉大学 Method for controlling liquid drops to cool overheated surface based on ion wind

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