CN112423545B - Flow monitoring module and micro-channel liquid cooling heat dissipation system - Google Patents
Flow monitoring module and micro-channel liquid cooling heat dissipation system Download PDFInfo
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- CN112423545B CN112423545B CN202011175819.3A CN202011175819A CN112423545B CN 112423545 B CN112423545 B CN 112423545B CN 202011175819 A CN202011175819 A CN 202011175819A CN 112423545 B CN112423545 B CN 112423545B
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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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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/06—Indicating or recording devices
- G01F15/061—Indicating or recording devices for remote indication
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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
Abstract
The embodiment of the invention provides a flow monitoring module and a micro-channel liquid cooling heat dissipation system, wherein the flow monitoring module comprises: the conductive flow channel is used for introducing fluid for flow monitoring; the accommodating cavity is internally provided with a magnetic fluid; the first signal terminal extends into the accommodating cavity and is electrically isolated from the conductive flow channel; the second signal terminal is electrically connected with the conductive flow channel; the flow blocking part is used for being movably arranged in the conductive flow channel through the elastic connecting part, a magnetic part corresponding to the magnetic fluid is arranged on the flow blocking part, the magnetic part is used for driving the magnetic fluid to move, and the first signal terminal is electrically connected with the conductive flow channel through the magnetic fluid; the invention realizes the sensitive monitoring of the fluid flow based on the synergistic effect of the flow resisting part, the magnetic part and the magnetic fluid, so as to ensure that the cooling liquid is continuously conveyed to the micro-channel radiator through the switching control of the liquid pump, thereby achieving the better radiating effect of the electronic device.
Description
Technical Field
The invention relates to the field of electronic device heat dissipation, in particular to a flow monitoring module and a micro-channel liquid cooling heat dissipation system.
Background
With the development of the micro-electro-mechanical system technology, the integration and high-frequency degree of electronic devices are continuously improved, the characteristic size is continuously reduced, the heat productivity of unit volume is continuously increased, and the heat dissipation of the electronic devices is more difficult due to the compact design structure, so that the technical problem of efficient heat dissipation of the electronic devices is urgently needed to be solved. However, the conventional air cooling and large-size pipeline liquid convection heat transfer technology is difficult to take away a large amount of heat generated on the electronic device in time, so that the temperature of the electronic device is increased, and the practicability and reliability of the electronic device are greatly reduced. Therefore, the heat dissipation technology with high heat flux in the micro space has become one of the key factors for restricting the development of information, electronics, aerospace and defense and military technologies.
The liquid cooling heat dissipation technology of the micro-channel is an efficient heat exchange mode, compared with the traditional air cooling and large-size pipeline liquid convection heat exchange mode, the micro-channel has a large heat transfer area under the same volume due to the fact that the channel size is small, and the heat exchange efficiency and the heat exchange coefficient are remarkably improved.
At present, the micro-channel radiator is mainly adopted to radiate the electronic device, and generally needs an external pump source to carry out the conveying of cooling liquid so as to ensure the flowing of the cooling liquid in the micro-channel radiator. However, the conventional micro-channel liquid cooling heat dissipation system is usually only provided with one circulating water pump for driving, and does not perform early warning on the operation condition of the circulating water pump based on flow monitoring of the cooling liquid. The existing flowmeter is large in size, is only suitable for monitoring large-flow fluid, and is not suitable for sensitively monitoring the flow of cooling liquid output by the microchannel radiator, so that the running working condition of the circulating water pump cannot be pre-warned.
Meanwhile, when the circulating water pump runs for a long time or under an emergency condition, the circulating water pump is easy to break down, and the cooling liquid introduced into the microchannel radiator can cut off, so that the microchannel radiator loses the heat dissipation capacity, and the safe and reliable running of the electronic equipment is directly influenced.
Disclosure of Invention
An object of an embodiment of the present invention is to provide a flow monitoring module, which is used to solve the problem that the existing flow meter is not suitable for sensitively monitoring the flow of the cooling liquid output by the microchannel radiator.
A second objective of the embodiments of the present invention is to provide a micro-channel liquid cooling heat dissipation system based on the above flow monitoring module, so as to solve the problem that the conventional micro-channel heat sink cannot work normally due to the coolant flowing off.
An embodiment of the present invention provides a flow monitoring module, including: the conductive flow channel is used for introducing fluid for flow monitoring; the accommodating cavity is arranged on the conductive flow channel, and a magnetic fluid is arranged in the accommodating cavity; the first signal terminal extends into the accommodating cavity and is electrically isolated from the conductive flow channel; a second signal terminal electrically connected to the conductive flow channel; the magnetic fluid is driven to move by the magnetic force part, and the first signal terminal is electrically connected with the conductive flow channel through the magnetic fluid.
According to the flow monitoring module of one embodiment of the present invention, the first signal terminal includes a plurality of terminals and is arranged along the axial direction of the conductive flow channel, and the choke element is configured to move along the axial direction of the conductive flow channel.
According to the flow monitoring module, the flow resisting piece comprises the orifice plate, and the end face of the orifice plate is perpendicular to the axial direction of the conductive flow passage.
According to the flow monitoring module of one embodiment of the invention, the edge of the choke element is slidably connected with the inner side wall of the conductive flow passage, and the elastic connecting element is located at the downstream of the choke element.
According to the flow monitoring module of one embodiment of the invention, one end of the flow resisting part is in sliding connection with the inner side wall of the conductive flow channel through the magnetic part, and the other end of the flow resisting part is in sliding connection with the inner side wall of the conductive flow channel through the auxiliary sliding block.
According to the flow monitoring module of one embodiment of the present invention, the inner side wall of the conductive flow channel is further provided with a first fixed block and a second fixed block which are located at the downstream of the flow blocking element, the first fixed block corresponds to the magnetic element along the axial direction of the conductive flow channel, the second fixed block corresponds to the auxiliary slider along the axial direction of the conductive flow channel, and the elastic connecting elements are respectively installed between the first fixed block and the magnetic element and between the second fixed block and the auxiliary slider.
According to an embodiment of the flow monitoring module of the present invention, the elastic connection member includes any one of a spring, an elastic rod and an elastic strip.
According to the flow monitoring module of one embodiment of the present invention, the conductive flow channel is any one of a steel tube, an aluminum tube and a copper tube, and/or an insulating shell is formed on an outer side wall of the conductive flow channel, and the accommodating cavity is defined between the insulating shell and the conductive flow channel.
The embodiment of the invention also provides a micro-channel liquid cooling heat dissipation system which comprises a micro-channel radiator, a flow monitoring module and a plurality of liquid pumps, wherein the flow monitoring module and the plurality of liquid pumps are jointly communicated with the micro-channel radiator through the flow monitoring module, and the flow monitoring module is respectively in communication connection with the liquid pumps so as to switch and control the working state of each liquid pump based on monitoring the flow of cooling liquid introduced into the micro-channel radiator.
According to the micro-channel liquid cooling heat dissipation system provided by the embodiment of the invention, the two liquid pumps comprise two liquid pumps, the flow monitoring module is in communication connection with the control module, and the control module is respectively connected with the two liquid pumps through the change-over switch.
The flow monitoring module and the micro-channel liquid cooling heat dissipation system provided by the embodiment of the invention have the advantages that the flow blocking piece is arranged in the conductive flow passage, the flow blocking piece is movably arranged in the conductive flow passage through the elastic connecting piece, when the flow rate of the fluid in the conductive flow channel changes, the flow resisting part can generate a flow resistance under the combined action of the fluid and the elastic connecting part, the magnetic fluid is maintained at different positions in the conductive flow passage, when the flow resisting part drives the magnetic part to move together, the magnetic part drives the magnetic fluid to move based on the electromagnetic action and controls the electric connection state of the first signal terminal and the conductive flow passage through the magnetic fluid, the second signal terminal is electrically connected with the conductive flow channel, so that the first signal terminal and the second signal terminal correspondingly output different switching value signals due to the change of the fluid flow in the conductive flow channel, and the sensitive monitoring of the fluid flow is realized.
Meanwhile, the liquid cooling heat dissipation system of the micro-channel shown in the embodiment of the invention adopts the flow monitoring module, can perform early warning on the operation condition of the liquid pump based on the flow monitoring of the cooling liquid, and can start other liquid pumps in time when one of the liquid pumps fails to deliver the cooling liquid to the micro-channel radiator continuously, thereby achieving a good heat dissipation effect on electronic devices.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structural diagram of a flow monitoring module according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a micro-channel liquid-cooling heat dissipation system according to an embodiment of the present invention.
In the figure, 1, a flow monitoring module; 101. a conductive flow channel; 102. an accommodating chamber; 103. a flow-impeding component; 104. an elastic connecting member; 105. a magnetic member; 106. a first signal terminal; 107. a second signal terminal; 108. an auxiliary slide block; 109. a first fixed block; 110. a second fixed block; 111. a magnetic fluid; 2. a microchannel heat sink; 3. a first liquid pump; 4. a second liquid pump; 5. a control module; 6. a first input pipe; 7. a second input pipe; 8. a first parallel branch pipe; 9. a second parallel branch pipe; 10. a three-way valve; 11. a first solenoid valve; 12. a second solenoid valve; 13. a third electromagnetic valve; 14. a fourth solenoid valve; 15. a switch; 16. a heat source.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without any inventive step, are within the scope of the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; 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 in specific cases to those skilled in the art.
Referring to fig. 1, the present embodiment provides a flow monitoring module 1, including: the flow monitoring device comprises a conductive flow channel 101, wherein fluid for flow monitoring is introduced into the conductive flow channel 101; the accommodating cavity 102, the accommodating cavity 102 is arranged on the conductive flow channel 101, and the accommodating cavity 102 is internally provided with a magnetic fluid 111; a first signal terminal 106, wherein the first signal terminal 106 extends into the accommodating cavity 102 and is electrically isolated from the conductive flow channel 101; a second signal terminal 107, wherein the second signal terminal 107 is electrically connected with the conductive flow channel 101; the choke element 103 is used for being movably installed in the conductive flow channel 101 through the elastic connection element 104, the magnetic element 105 corresponding to the magnetic fluid 111 is installed on the choke element 103, the magnetic element 105 is used for driving the magnetic fluid 111 to move, and the magnetic fluid 111 is used for electrically connecting the first signal terminal 106 with the conductive flow channel 101, wherein a direction indicated by an arrow in fig. 1 is a flowing direction of fluid in the conductive flow channel 101.
Specifically, in the flow rate monitoring module 1 shown in this embodiment, the flow blocking element 103 is movably installed in the conductive flow channel 101 through the elastic connecting element 104 by disposing the flow blocking element 103 in the conductive flow channel 101, when the flow rate of the fluid in the conductive flow path 101 changes, the choke 103 will be connected to the elastic connection element 104 under the combined action of the fluid and the elastic connection element, the magnetic fluid 111 is maintained at different positions in the conductive flow channel 101, and when the magnetic fluid 105 is driven by the choke element 103 to move together, the magnetic fluid 111 is driven by the magnetic fluid 105 to move based on the electromagnetic effect, and controls the electrical connection state of the first signal terminal 106 and the conductive flow channel 101 through the magnetic fluid 111, because the second signal terminal 107 is electrically connected to the conductive flow channel 101, the first signal terminal 106 and the second signal terminal 107 correspondingly output different switching value signals due to the change of the flow rate of the fluid in the conductive flow channel 101, thereby automatically realizing the sensitive monitoring of the fluid flow rate.
It should be noted that the elastic connection member 104 shown in the present embodiment may be any one of a spring, an elastic rod and an elastic strip, but the elastic connection member 104 shown in the present embodiment is preferably a spring in order to better control the movement of the choke member 103. When monitoring the flow rate of the fluid, the choke element 103 is maintained at different positions in the conductive flow channel 101 under the combined action of the fluid and the elastic connection element 104, so that the elastic connection element 104 shown in this embodiment includes a plurality of deformation states, when the flow rate of the fluid is large, the fluid generates a large acting force on the choke element 103, so that the elastic connection element 104 is in a first deformation state, at this time, the choke element 103 is located at the right side of the first signal terminal 106 in fig. 1, and at this time, the first signal terminal 106 is electrically isolated from the second signal terminal 107; when the flow of the fluid is reduced, because the acting force of the fluid on the choke piece 103 is correspondingly reduced, the choke piece 103 moves leftwards correspondingly at the moment, the magnetic fluid 111 is driven by the magnetic component 105 to move leftwards until the elastic connecting piece 104 is in the second deformation state, at the moment, the magnetic fluid 111 is located between the first signal terminal 106 and the conductive flow channel 101, and the first signal terminal 106 is communicated with the second signal terminal 107 through the magnetic fluid 111 and the conductive flow channel 101, so that the two flow states of the fluid in the conductive flow channel 101 can be sensitively monitored.
Here, in order to implement monitoring of different flow states of the fluid, a plurality of first signal terminals 106 may be provided based on a corresponding relationship between the flow of the fluid and the position of the flow blocking element 103, and it is set that in a normal state, the flow that is normally introduced to the microchannel heat sink 2 through the flow monitoring module 1 shown in this embodiment is a reference flow, and then the plurality of first signal terminals 106 may be adaptively arranged along the axial direction of the conductive flow channel 101 based on a percentage relative to a reference flow value, so that when the flow blocking element 103 drives the magnetic element 105 to axially move along the conductive flow channel 101, based on the movement of the magnetic fluid 111, the second signal terminals 107 may be correspondingly communicated with the different first signal terminals 106, and different switching signals may be correspondingly output, thereby implementing sensitive monitoring of different flows of the fluid.
Meanwhile, the conductive flow path 101 shown in the present embodiment may be any one of a steel pipe, an aluminum pipe, and a copper pipe, and is not particularly limited herein, and the port shape of the conductive flow path 101 may be a circle, a rectangle, a regular polygon, and the like. The receiving cavity 102 shown in the present embodiment may be disposed in the sidewall of the conductive flow path 101, or disposed on the outer sidewall of the conductive flow path 101, which is not limited in this respect. As shown in fig. 1, in one preferred embodiment, an insulating housing is formed on an outer side wall of the conductive flow channel 101, and a receiving cavity 102 is defined between the insulating housing and the conductive flow channel 101.
In addition, the flow resisting element 103 shown in the present embodiment can be understood as a component that can generate a certain resistance to the flow of the fluid in the conductive flow channel 101, but does not affect the normal transportation of the fluid in the conductive flow channel 101, such as a wire mesh, a hole plate, a fence grid, and the like with a certain opening density, and is not particularly limited herein. As shown in fig. 1, in one preferred embodiment, the flow resisting element 103 is provided as an orifice plate, and an end surface of the orifice plate is perpendicular to the axial direction of the conductive flow channel 101, so that the orifice plate can better bear the acting force from the fluid and can ensure that the fluid smoothly flows in the conductive flow channel 101, so as to monitor the flow rate of the fluid.
As shown in fig. 1, based on the improvement of the above-mentioned embodiment, the edge of the choke element 103 in this embodiment is slidably connected to the inner sidewall of the conductive flow channel 101, and the elastic connection element 104 is located downstream of the choke element 103, so that when the fluid exerts a continuous pushing force on the choke element 103 from upstream, an elastic contact force toward upstream can be exerted on the choke element 103 by the downstream elastic connection element 104, so that the choke element 103 reaches dynamic balance at a corresponding flow rate.
Specifically, in this embodiment, one end of the choke element 103 is slidably connected to the inner sidewall of the conductive flow channel 101 through the magnetic element 105, and the other end is slidably connected to the inner sidewall of the conductive flow channel 101 through the auxiliary slider 108. In order to further reduce the sliding friction between the spoiler 103 and the inner sidewall of the conductive flow channel 101, in this embodiment, both the magnetic member 105 and the auxiliary slider 108 may contact the inner sidewall of the conductive flow channel 101 through the directional wheel, and a guide groove corresponding to the magnetic member 105 or the auxiliary slider 108 may be further disposed on the inner sidewall of the conductive flow channel 101, and the guide groove is arranged along the axial direction of the conductive flow channel 101.
As shown in fig. 1, based on the improvement of the above embodiment, in order to ensure that the choke element 103 moves stably in the conductive flow channel 101 along the axial direction thereof when the flow rate of the fluid changes, in this embodiment, a first fixed block 109 and a second fixed block 110 located downstream of the choke element 103 are further installed on the inner side wall of the conductive flow channel 101, the first fixed block 109 corresponds to the magnetic element 105 along the axial direction of the conductive flow channel 101, the second fixed block 110 corresponds to the auxiliary slider 108 along the axial direction of the conductive flow channel 101, and the elastic connection elements 104 are installed between the first fixed block 109 and the magnetic element 105 and between the second fixed block 110 and the auxiliary slider 108.
As shown in fig. 2, an embodiment of the present invention further provides a micro-channel liquid cooling heat dissipation system, which includes a micro-channel heat sink 2, the flow monitoring module 1 and multiple liquid pumps, where the multiple liquid pumps are commonly connected to the micro-channel heat sink 2 through the flow monitoring module 1, and the flow monitoring module 1 is respectively in communication connection with the liquid pumps to switch and control the working states of the liquid pumps based on monitoring the flow of the cooling liquid introduced into the micro-channel heat sink 2.
Specifically, the microchannel heat sink 2 shown in this embodiment is tightly attached to the heat source 16 through a high thermal conductivity interface material, the heat source 16 may be an electronic device known in the art, and after the heat of the heat source 16 is conducted to the microchannel heat sink 2, the heat is finally taken away by the cooling water in the micro channel of the microchannel heat sink 2, so as to realize efficient heat dissipation of the heat source 16. The cooling liquid shown in the present embodiment is specifically cooling water.
Meanwhile, the liquid pump shown in this embodiment adopts a micro self-suspending circulating water pump known in the art, the liquid pump is provided with two pumps, and is respectively represented by a first liquid pump 3 and a second liquid pump 4 in fig. 2, when in use, the flow rate monitoring module 1, a 12V dc power supply and a control module 5 can respectively form a closed loop through leads, and the control module 5 controls the switching of the working states of the first liquid pump 3 and the second liquid pump 4 through a switch 15.
As shown in fig. 1 and fig. 2, the flow monitoring module 1 shown in this embodiment is specifically provided with a first signal terminal 106 and a second signal terminal 107, the first signal terminal 106 on the flow monitoring module 1 is connected to the positive electrode of a dc power supply, the negative electrode of the dc power supply and the second signal terminal 107 on the flow monitoring module 1 are respectively connected to the input end of the control module 5, the control module 5 may be a PLC controller or a single chip microcomputer known in the art, the output end of the control module 5 is connected to a switch in a communication manner to control the switching state of the switch 15, and the switch 15 is used for switching and controlling the on-off state of the corresponding power supply loops of the first liquid pump 3 and the second liquid pump 4.
As shown in fig. 2, when the coolant is supplied to the microchannel radiator 2, a coolant supply line is provided, the coolant supply line includes a first input pipe 6, a second input pipe 7, a first parallel branch pipe 8, and a second parallel branch pipe 9, one end of the first input pipe 6 is used for introducing the coolant, the other end is connected to one ends of the first parallel branch pipe 8 and the second parallel branch pipe 9, the other ends of the first parallel branch pipe 8 and the second parallel branch pipe 9 are connected to one end of the second input pipe 7 through a three-way valve 10, the other end of the second input pipe 7 is connected to the microchannel radiator 2, wherein a first electromagnetic valve 11 is installed on the first input pipe 6, a second electromagnetic valve 12 and a first liquid pump 3 are installed on the first parallel branch pipe 8, a third electromagnetic valve 13 and a second liquid pump 4 are installed on the second parallel branch pipe 9, the first liquid pump 3 and the second liquid pump 4 are in standby with each other, the flow monitoring module 1 is installed on the second input pipe 7, the fourth electromagnetic valve 14 is installed at the output end of the micro-channel radiator 2, and the working states of the three-way valve 10, the first electromagnetic valve 11, the second electromagnetic valve 12, the third electromagnetic valve 13 and the fourth electromagnetic valve 14 can be controlled by the control module 5 in real time.
Based on the micro-channel liquid cooling heat dissipation system shown in the embodiment, the working principle is as follows:
first, under normal conditions, one of the liquid pumps operates normally so as to continuously pump the coolant to the microchannel heat sink 2 based on the coolant delivery pipe, at this time, the flow rate of the coolant passing through the flow monitoring module 1 is a reference flow rate, since the coolant generates a large thrust action on the choke 103 at this flow rate, the choke 103 will maintain dynamic balance on the right side of the first signal terminal 106, and at this time, the magnetic fluid 111 is correspondingly located on the right side of the first signal terminal 106 along with the magnetic member 105.
When the liquid pump in operation fails, for example, when the first liquid pump 3 fails, the flow rate of the coolant is directly reduced, because the thrust generated by the coolant to the flow blocking piece 103 is reduced when the flow rate is reduced, the flow blocking piece 103 moves to the left under the elastic force of the elastic connecting piece 104, when the flow rate is reduced to 70% of the reference flow rate value, the magnetic fluid 111 moves to a position between the first signal terminal 106 and the outer side wall of the conductive flow channel 101 under the driving of the magnetic piece 105, so that the first signal terminal 106 is electrically connected with the second signal terminal 107, the flow monitoring module 1 sends a switching value signal to the control module 5, the control module 5 outputs a control command, on one hand, the conduction state of the three-way valve 10 is switched to a passage corresponding to the second liquid pump 4, the second electromagnetic valve 12 is closed, the third electromagnetic valve 13 is opened, so that the first parallel branch pipe 8 corresponding to the first liquid pump 3 is closed, the second parallel branch pipe 9 corresponding to the second liquid pump 4 is conducted, on the other hand, the control module 5 further controls the switching state of the switch 15, so that the first liquid pump 3 stops running, the second liquid pump 4 starts running to ensure that the flow of the cooling liquid is recovered to the reference flow value, the sufficient flow of the cooling liquid introduced into the micro-channel radiator 2 is ensured, and the failed liquid pump can be directly detached and replaced without stopping the heat dissipation system, so that the on-line maintenance of the liquid pump is realized.
From the above, the flow monitoring module shown in this embodiment has a compact structure, can implement a miniaturized design, and based on the synergistic effect of the flow resisting part, the magnetic part, and the magnetic fluid, realizes sensitive monitoring of the fluid flow, so as to ensure that the cooling liquid is continuously delivered to the microchannel radiator through the switching control of the liquid pump, thereby achieving a better heat dissipation effect on the electronic device.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
1. A flow monitoring module, comprising:
the conductive flow channel is used for introducing fluid for flow monitoring;
the accommodating cavity is arranged on the conductive flow channel, and a magnetic fluid is arranged in the accommodating cavity;
the first signal terminal extends into the accommodating cavity and is electrically isolated from the conductive flow channel;
a second signal terminal electrically connected to the conductive flow channel;
the magnetic fluid is driven to move by the magnetic force part, and the first signal terminal and the conductive flow channel are controlled to be in an electric isolation state or an electric connection state by the magnetic fluid.
2. The flow monitoring module according to claim 1, wherein the first signal terminal includes a plurality of terminals and is arranged along an axial direction of the conductive flow path, and the choke member is configured to move along the axial direction of the conductive flow path.
3. The flow monitoring module of claim 1, wherein the flow blocking element comprises an orifice plate having an end surface perpendicular to an axial direction of the conductive flow path.
4. A flow monitoring module according to any one of claims 1 to 3, wherein the edge of the resistive element is slidably connected to the inner side wall of the conductive flow path, and the resilient connecting element is located downstream of the resistive element.
5. The flow monitoring module according to claim 4, wherein one end of the blocking element is slidably connected to the inner sidewall of the conductive flow channel through the magnetic element, and the other end of the blocking element is slidably connected to the inner sidewall of the conductive flow channel through an auxiliary slider.
6. The flow monitoring module according to claim 5, wherein a first fixing block and a second fixing block are further mounted on an inner sidewall of the conductive flow channel, the first fixing block and the second fixing block are located downstream of the flow blocking element, the first fixing block corresponds to the magnetic element along an axial direction of the conductive flow channel, the second fixing block corresponds to the auxiliary slider along the axial direction of the conductive flow channel, and the elastic connecting elements are mounted between the first fixing block and the magnetic element and between the second fixing block and the auxiliary slider.
7. The flow monitoring module of claim 6, wherein the resilient connector comprises any one of a spring, a resilient rod, and a resilient strip.
8. The flow monitoring module according to any one of claims 1 to 3, wherein the conductive flow channel is any one of a steel tube, an aluminum tube and a copper tube, and/or an insulating shell is formed on an outer side wall of the conductive flow channel, and the accommodating cavity is defined between the insulating shell and the conductive flow channel.
9. A micro-channel liquid cooling heat dissipation system comprises a micro-channel radiator and is characterized by further comprising a flow monitoring module and multiple paths of liquid pumps according to any one of claims 1 to 8, wherein the multiple paths of liquid pumps are communicated with the micro-channel radiator through the flow monitoring module, and the flow monitoring module is respectively in communication connection with the liquid pumps so as to switch and control the working states of the liquid pumps based on monitoring of the flow of cooling liquid introduced into the micro-channel radiator.
10. The micro channel liquid cooling heat dissipation system of claim 9, wherein the liquid pumps comprise two liquid pumps, the flow monitoring module is in communication connection with a control module, and the control module is connected to the two liquid pumps through a switch.
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| CN2389355Y (en) * | 1999-09-11 | 2000-07-26 | 王培锋 | High-precision flow-indication signalling apparatus |
| CN205861719U (en) * | 2016-07-13 | 2017-01-04 | 中国长江电力股份有限公司 | A kind of baffle-type flow switch being suitable for multi-state |
| CN111316071A (en) * | 2018-10-12 | 2020-06-19 | 昭和机器计装株式会社 | Flow choking type flow detector |
| EP3705164A1 (en) * | 2019-03-02 | 2020-09-09 | LENSER Filtration GmbH | Leakage detector for filter elements |
| CN111256765A (en) * | 2020-03-23 | 2020-06-09 | 中物合集团有限公司 | Magnetic target-pushing type flowmeter |
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Inventor after: Qiu Zhiqiang Inventor after: Feng Yi Inventor after: Li Yong Inventor after: Zhang Kelong Inventor after: Wang Junrong Inventor after: Wu Jun Inventor after: Ke Hanbing Inventor after: Xiao Qi Inventor after: Wei Zhiguo Inventor after: Lv Weijian Inventor after: Pang Jie Inventor after: Huang Chonghai Inventor after: Ma Can Inventor after: Chen Kai Inventor after: Ke Zhiwu Inventor after: Wang Wei Inventor after: Generation road Inventor after: Gou Jinlan Inventor after: Lin Yuansheng Inventor after: Li Bangming Inventor before: Huang Chonghai Inventor before: Feng Yi Inventor before: Li Yong Inventor before: Zhang Kelong Inventor before: Wang Junrong Inventor before: Wu Jun Inventor before: Ke Hanbing Inventor before: Xiao Qi Inventor before: Wei Zhiguo Inventor before: Lv Weijian Inventor before: Pang Jie Inventor before: Chen Kai Inventor before: Ma Can Inventor before: Ke Zhiwu Inventor before: Qiu Zhiqiang Inventor before: Wang Wei Inventor before: Generation road Inventor before: Gou Jinlan Inventor before: Lin Yuansheng Inventor before: Li Bangming |
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