CN115824515A - Liquid cooling equipment leakage detection device and method based on flexible circuit board - Google Patents
Liquid cooling equipment leakage detection device and method based on flexible circuit board Download PDFInfo
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- CN115824515A CN115824515A CN202211364795.5A CN202211364795A CN115824515A CN 115824515 A CN115824515 A CN 115824515A CN 202211364795 A CN202211364795 A CN 202211364795A CN 115824515 A CN115824515 A CN 115824515A
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- 238000001514 detection method Methods 0.000 title claims abstract description 157
- 239000007788 liquid Substances 0.000 title claims abstract description 112
- 238000001816 cooling Methods 0.000 title claims abstract description 49
- 238000000034 method Methods 0.000 title claims abstract description 11
- 230000001960 triggered effect Effects 0.000 claims abstract description 15
- 208000032750 Device leakage Diseases 0.000 claims description 16
- 230000003287 optical effect Effects 0.000 claims description 7
- 230000008878 coupling Effects 0.000 claims description 5
- 238000010168 coupling process Methods 0.000 claims description 5
- 238000005859 coupling reaction Methods 0.000 claims description 5
- 239000000110 cooling liquid Substances 0.000 claims description 4
- 230000008569 process Effects 0.000 claims description 4
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 abstract description 4
- 238000010586 diagram Methods 0.000 description 10
- 238000004806 packaging method and process Methods 0.000 description 4
- 230000017525 heat dissipation Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
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- 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
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management
Abstract
The invention relates to the field of liquid cooling leakage detection, and particularly discloses a liquid cooling equipment leakage detection device and method based on a flexible circuit board, wherein the flexible circuit board is provided with a leakage detection circuit, a plurality of detection bonding pads and a plurality of signal indicator lamps; one detection bonding pad corresponds to one signal indicator lamp; the detection bonding pad and the signal indicator lamp are respectively electrically connected with the leakage detection circuit, and the leakage detection circuit is also electrically connected with the equipment background; the flexible circuit board is wound on the outer surface of the liquid cooling pipe, when liquid leakage occurs, the detection bonding pad detects the liquid leakage, the liquid leakage detection circuit is triggered to send a liquid leakage signal to the equipment background, and meanwhile, the corresponding signal indicator lamp is triggered to light through the liquid leakage detection circuit. The invention realizes the leakage detection by using the detection bonding pad on the flexible circuit board, and indicates the leakage position by using the signal indicator lamp corresponding to the detection bonding pad, thereby realizing the quick positioning of the leakage position, facilitating the subsequent maintenance, having no need of a small leakage detection plate or other parts, and reducing the cost.
Description
Technical Field
The invention relates to the field of liquid cooling leakage detection, in particular to a liquid cooling equipment leakage detection device and method based on a flexible circuit board.
Background
The rapid development of the current social information digitization industry, industries such as banks, IT and games have more and more requirements on servers, higher and higher performance requirements, and the performance improvement is not independent of the increase of the power of the servers, so that the heat dissipation strategy and efficiency of the servers are particularly important, the good heat dissipation can improve the operation speed and efficiency of the servers, and on the contrary, a series of problems such as the reduction of the efficiency and downtime of the servers are caused.
For the complete machine radiating efficiency who improves the server, reduce server heat dissipation and server fan service power, consequently make liquid cooling server use more and more generally, but because the unreliable risk that the leakproofness problem of the long-time transmission of liquid cooling pipeline and long-time operation exist, the liquid seepage that leads to the transmission easily to the pipeline outside to form the dropping liquid, and then on dripping the server mainboard, lead to the server mainboard to produce the short circuit risk, the mainboard damages, the influence continues to use the scheduling problem. Therefore, liquid leakage detection equipment is needed to detect whether liquid cooling leaks or not, and processing is timely performed to protect the server during liquid leakage.
The existing leakage detection scheme generally uses a leakage detection cable which is arranged along a cooling pipeline and is matched with a special leakage detection plate to send out an alarm when leakage occurs. Fig. 1 shows a schematic structural diagram of the principle of the current leakage detection scheme, and the basic principle is as follows: the leakage detection cable is wound to cover the surface of the liquid cooling pipe, when leakage occurs in a pipeline, the leakage detection cable is in contact with cooling liquid, the resistance value of the leakage detection cable is changed, the sensor is triggered, a leakage signal is sent to the leakage detection small plate, the leakage detection small plate processes the signal and then sends the signal to the BMC for judgment, and the BMC controls the CPLD to perform protection operations such as shutdown through an I2C bus during leakage, so that the system is prevented from being damaged after the leakage problem occurs.
According to the existing leakage detection scheme, when leakage occurs, the impedance of a leakage detection cable can change, so that leakage alarm is triggered, a specific leakage position cannot be known, and subsequent positioning and maintenance work is not facilitated. Meanwhile, the leakage detection cable needs to be matched with a special leakage detection plate for detection, a fixed position of a structure needs to be reserved, and the product cost is increased.
Disclosure of Invention
In order to solve the problems, the invention provides a liquid cooling equipment leakage detection device and method based on a flexible circuit board.
In a first aspect, the technical scheme of the invention provides a liquid cooling device leakage detection device based on a flexible circuit board, wherein the flexible circuit board is provided with a leakage detection circuit, a plurality of detection bonding pads and a plurality of signal indicator lamps; one detection bonding pad corresponds to one signal indicator lamp; the detection bonding pad and the signal indicator light are respectively electrically connected with the liquid leakage detection circuit, and the liquid leakage detection circuit is also electrically connected with the equipment background; the flexible circuit board is wound on the outer surface of the liquid cooling pipe, when liquid leakage occurs, the detection bonding pad detects the liquid leakage, the liquid leakage detection circuit is triggered to send a liquid leakage signal to the equipment background, and meanwhile, the corresponding signal indicator lamp is triggered to light through the liquid leakage detection circuit.
Further, the detection pad comprises a first detection sub-pad and a second detection sub-pad, when liquid leakage occurs, the first detection sub-pad and the second detection sub-pad are in short circuit through cooling liquid, the liquid leakage detection circuit is triggered to send liquid leakage signals to the equipment background, and the corresponding signal indicator lamp is triggered simultaneously.
Further, the liquid leakage detection circuit includes: the device comprises a first resistor, a second resistor and an optocoupler switch;
the first detection sub-pad is connected with a first end of a first resistor through a signal indicator lamp, a second end of the first resistor and a first end of a second resistor are connected to a power supply voltage, a second end of the second resistor is connected with a 2 nd pin of the optocoupler switch, a 1 st pin and a 3 rd pin of the optocoupler switch are grounded, and a 4 th pin of the optocoupler switch is connected with the second detection sub-pad;
when liquid leakage occurs, the second end of the second resistor outputs a liquid leakage signal.
Furthermore, the signal indicator light is a light emitting diode, the first detection sub-pad is connected with the negative electrode of the light emitting diode, and the first end of the first resistor is connected with the positive electrode of the light emitting diode.
Furthermore, the liquid leakage detection circuit also comprises a first connector, wherein the first connector is provided with a 1 st pin, a 2 nd pin, a 3 rd pin and a 4 th pin;
the 1 st pin outputs a power supply voltage to be connected to the second end of the first resistor and the first end of the second resistor, the 2 nd pin is connected with the second end of the second resistor, and the 3 rd pin and the 4 th pin are grounded; wherein the 4 th pin is an in-situ detection pin.
Further, the flexible circuit board comprises a TOP layer and a BOT layer, wherein the TOP layer is arranged on the upper side, the BOT layer is arranged on the lower side, and the TOP layer is in contact with the outer surface of the liquid cooling pipe; the detection bonding pad is arranged on the TOP layer, the first connector, the first resistor, the second resistor, the optical coupling switch and the signal indicator lamp are arranged on the BOT layer, and the BOT layer is subjected to insulation treatment.
Further, the liquid cooling device is a server.
Furthermore, the equipment background refers to a mainboard of the server, and the mainboard is provided with a BMC and a CPLD;
the mainboard is also provided with a second connector, and the second connector comprises a 1 st pin, a 2 nd pin, a 3 rd pin and a 4 th pin; the first connector is plugged with the second connector;
the 1 st pin is connected with a power supply voltage, the 2 nd pin receives a leakage signal output by the first connector and outputs the leakage signal to the BMC, the 3 rd pin receives an in-place detection signal of the first connector and outputs the in-place detection signal to the BMC, and the 4 th pin is grounded;
a pull-down resistor is connected to a line between the No. 2 pin and the BMC, and a pull-up resistor is connected to a line between the No. 3 pin and the BMC.
Furthermore, the device is also provided with an external power supply, and when the whole equipment is powered off, the external power supply supplies power to the flexible circuit board.
In a second aspect, a technical solution of the present invention provides a liquid-cooling device leakage detection method based on a flexible circuit board, including the following steps:
after the server is powered on, the BMC detects whether the flexible circuit board is in place, and if the flexible circuit board is not in place, the BMC alarms and uploads a log; if the flexible circuit board is in place and no leakage signal exists, the BMC informs the CPLD that the server is normally started after the CPLD receives the power supply key signal, and if the flexible circuit board is in place and the leakage signal exists, the BMC sends an alarm and uploads a log and informs the CPLD not to respond to the power supply key signal, and the server is not started;
if the BMC receives the liquid leakage signal in the operation process of the server, the BMC sends an alarm and uploads a log to perform shutdown protection operation of the whole machine.
Compared with the prior art, the liquid-cooling equipment leakage detection device and method based on the flexible circuit board have the following beneficial effects: the flexible circuit board is wound on the liquid cooling pipe, and the exposed detection bonding pad on the flexible circuit board is utilized to realize the leakage detection of the equipment, reduce the number of cables and fixing structural members in the equipment, facilitate the cable wiring in the equipment and reduce the cost; meanwhile, each detection bonding pad corresponds to one signal indicator lamp, and the position where liquid leakage occurs can be quickly positioned by lighting the signal indicator lamps, so that later positioning and maintenance work is facilitated; the leakage can be deduced by the number of the lighted signal indicator lamps and the distribution condition of the lighted signal indicator lamps, such as: if the number of the lighted signal indicator lamps is large and the signal indicator lamps are dispersed, the situation that liquid leakage occurs at a plurality of positions and the amount of the liquid leakage is small can be inferred; if the number of the lighted signal indicator lamps is large and concentrated, it can be inferred that the amount of the liquid leakage is large.
Drawings
For a clearer explanation of the embodiments or technical solutions of the prior art of the present application, the drawings needed for the description of the embodiments or prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of the principle of the current leakage detection scheme.
Fig. 2 is a schematic structural diagram of a liquid-cooling device liquid leakage detection apparatus based on a flexible circuit board according to an embodiment of the present invention.
Fig. 3 is a schematic structural diagram of a liquid leakage detection circuit of a liquid cooling device liquid leakage detection apparatus based on a flexible circuit board according to an embodiment of the present invention.
Fig. 4 is a schematic side structure view of a flexible circuit board of a liquid cooling device liquid leakage detection apparatus based on the flexible circuit board according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a TOP layer of a flexible circuit board of a liquid cooling device leakage detection apparatus based on the flexible circuit board according to an embodiment of the present invention.
Fig. 6 is a schematic structural diagram of a BOT layer of a flexible circuit board of a liquid cooling device liquid leakage detection apparatus based on the flexible circuit board according to an embodiment of the present invention.
Fig. 7 is a schematic structural diagram of a principle that a liquid-cooling device liquid leakage detection apparatus based on a flexible circuit board according to an embodiment of the present invention is applied to a server.
In the figure, 1_ flexible circuit board, 1-1 _TOPlayer, 1-2 _BOTlayer, 2_ liquid leakage detection circuit, 3_ detection pad, 3-1_ first detection sub-pad, 3-2_ second detection sub-pad, 4_ signal indicator lamp, 5_ equipment background, 6_ first connector, 7_ second connector, R1_ first resistor, R2_ second resistor, Q1_ optical coupler switch, R3_ pull-down resistor and R4_ pull-up resistor.
Detailed Description
The following explains a part of english data according to the present invention.
BMC, basebaard Manager Controller, baseboard management Controller.
CPLD Complex Programmable Logic Device.
I2C, inter-Integrated Circuit Bus, two-wire serial Bus.
FPC Flexible Printed Circuit.
In order that those skilled in the art will better understand the disclosure, the following detailed description will be given with reference to the accompanying drawings. It is to be understood that the embodiments described are only a few embodiments of the present application and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Fig. 2 is a schematic structural diagram of a liquid-cooling device leakage detection apparatus based on a flexible circuit board according to an embodiment of the present invention, and as shown in fig. 2, the apparatus includes a flexible circuit board 1, and a leakage detection circuit 2, a plurality of detection pads 3, and a plurality of signal indicator lamps 4 are disposed on the flexible circuit board 1.
One detection bonding pad 3 corresponds to one signal indicator lamp 4; the detection bonding pad 3 and the signal indicator lamp 4 are respectively electrically connected with the leakage detection circuit 2, and the leakage detection circuit 2 is also electrically connected with the equipment background 5. During the use, twine flexible circuit board 1 on the liquid cooling outside of tubes surface, when taking place the weeping, detect pad 3 and detect the weeping, trigger weeping detection circuitry 2 and send weeping signal to equipment backstage 5, trigger corresponding signal indicator lamp 4 through weeping detection circuitry 2 simultaneously and light.
It is understood that the inspection pad 3 is exposed on the flexible circuit board 1 to detect a liquid leakage. The detection pad 3 of the embodiment comprises two sub-pads, namely a first detection sub-pad 3-1 and a second detection sub-pad 3-2, wherein the first detection sub-pad 3-1 and the second detection sub-pad 3-2 are close to each other, when liquid leakage occurs, the first detection sub-pad 3-1 and the second detection sub-pad 3-2 are in short circuit through cooling liquid, and then the liquid leakage detection circuit 2 is triggered to send a liquid leakage signal to the equipment background 5, and meanwhile, the corresponding signal indicator lamp 4 is triggered.
The sizes of the first detection sub-pad 3-1 and the second detection sub-pad 3-2 can be selected according to the tube diameter of the liquid cooling tube, if the tube diameter is smaller, the small packaging detection pad 3 (such as 0402 packaging) can be selected, and if the tube diameter is larger, the larger packaging detection pad 3 (such as 0805, 1206 and other packaging) can be selected.
Fig. 3 is a schematic structural diagram of the liquid leakage detection circuit 2 in this embodiment, and as shown in fig. 3, the liquid leakage detection circuit 2 includes a first resistor R1, a second resistor R2, and an optical coupler switch Q1.
The first detection sub-pad 3-1 is connected with a first end of a first resistor R1 through a signal indicator lamp 4, a second end of the first resistor R1 and a first end of a second resistor R2 are connected to a power supply voltage, a second end of the second resistor R2 is connected with a 2 nd pin of an optocoupler switch Q1, a 1 st pin and a 3 rd pin of the optocoupler switch Q1 are grounded, and a 4 th pin of the optocoupler switch Q1 is connected with the second detection sub-pad 3-2; when liquid leakage occurs, the second end of the second resistor R2 outputs a liquid leakage signal.
The signal indicator lamp 4 can be a light emitting diode, the first detection sub-pad 3-1 is connected with the cathode of the light emitting diode, and the first end of the first resistor R1 is connected with the anode of the light emitting diode.
Under normal conditions, the first detection sub-pad 3-1 and the second detection sub-pad 3-2 are not conducted, the optocoupler switch Q1 is switched off, and the level of the second end of the second resistor R2 is a high level; when liquid leakage occurs, the first detection sub-pad 3-1 and the second detection sub-pad 3-2 are in short circuit, the corresponding loop is conducted, the corresponding signal indicator lamp 4 is lightened, the optocoupler switch Q1 is conducted, the level of the second end of the second resistor R2 is pulled down, and a liquid leakage signal is output to the equipment background 5.
In order to connect with the device background 5, the liquid leakage detection circuit 2 is further provided with a first connector 6, and the first connector is connected with the device background 5 through the connector. As shown in fig. 3, the first connector 6 has a 1 st pin, a 2 nd pin, a 3 rd pin, and a 4 th pin. The 1 st pin outputs a power supply voltage to be connected to the second end of the first resistor R1 and the first end of the second resistor R2, the 2 nd pin is connected with the second end of the second resistor R2, and the 3 rd pin and the 4 th pin are grounded; wherein the 4 th pin is an in-situ detection pin.
When liquid LEAKAGE occurs, the FM _ leak _ N signal of the 2 nd pin of the first connector 6 is pulled low, that is, a liquid LEAKAGE detection signal is output to the device background 5. In addition, the LEAK _ PRSNT _ N signal of the 3 rd pin of the first connector 6 is an in-place detection signal, and the device background 5 detects whether the flexible circuit board 1 is in place or not through the in-place detection signal.
As shown in fig. 4-6, the flexible circuit board 1 of the present embodiment includes a TOP layer 1-1 and a BOT layer 1-2, the TOP layer 1-1 being on the upper side, the BOT layer 1-2 being on the lower side, the TOP layer 1-1 contacting the outer surface of the liquid-cooled tube; the detection bonding pad 3 is arranged on the TOP layer 1-1, and the first connector 6, the first resistor R1, the second resistor R2, the optocoupler switch Q1 and the signal indicator lamp 4 are arranged on the BOT layer 1-2.
Contacting the TOP layer 1-1 with the outer surface of the liquid-cooled tube, and contacting the detection bonding pad 3 with the outer surface of the liquid-cooled tube to detect leakage; the BOT layer 1-2 is arranged on the back surface, and meanwhile, the BOT layer 1-2 is subjected to insulation treatment to prevent short circuit caused by liquid. In addition, it can be understood that the detection pads 3 and the corresponding signal indicating lamps 4 are at the relative positions of the TOP layer 1-1 and the BOT layer 1-2, and when a certain detection pad 3 detects a liquid leakage, the signal indicating lamp 4 of the back plate is lighted to locate the liquid leakage position.
The liquid cooling device leakage detection device based on the flexible circuit board 1 can be applied to a server, namely, the liquid cooling device is the server. When the flexible circuit board 1 is applied to a server, the leakage signal is transmitted to the BMC on the mainboard by the flexible circuit board 1.
Fig. 7 is a schematic diagram of a principle structure of the liquid-cooling device leakage detection device based on the flexible circuit board 1 applied to a server according to this embodiment, a BMC and a CPLD are arranged on a motherboard of the server, and a second connector 7 is arranged at the same time, where the second connector 7 includes a 1 st pin, a 2 nd pin, a 3 rd pin, and a 4 th pin; the first connector 6 and the second connector 7 are plugged, so that the connection between the BMC and the flexible circuit board 1 is realized.
The No. 1 pin of the second connector 7 is connected with a power supply voltage, the No. 2 pin receives a leakage signal output by the first connector 6 and outputs the leakage signal to the BMC, the No. 3 pin receives an in-place detection signal of the first connector 6 and outputs the in-place detection signal to the BMC, and the No. 4 pin is grounded. In addition, a pull-down resistor R3 is connected to a line between the No. 2 pin and the BMC, and a pull-up resistor R4 is connected to a line between the No. 3 pin and the BMC.
The flexible circuit board 1 outputs a leakage signal to the BMC through a cable, the BMC sends an alarm, protection operations such as shutdown of the whole machine can be carried out, and short circuit damage of a server mainboard caused by leakage is avoided.
If the BMC is subjected to shutdown operation of the whole machine due to liquid leakage, an external power supply can be used for supplying power to the flexible circuit board 1, and the liquid leakage position of the liquid outlet cooling pipe is positioned by lighting the signal indicator lamp 4. Meanwhile, the leakage situation can be deduced by the number of the lighted signal indicator lamps 4 and the distribution situation thereof, such as: if the number of the lighted signal indicator lamps 4 is large and the signal indicator lamps are dispersed, it can be concluded that liquid leakage occurs at a plurality of positions and the amount of the liquid leakage is small; if the number of the lighted signal indicating lamps 4 is large and concentrated, it can be inferred that the amount of the liquid leakage is large. So that subsequent maintenance work can be carried out.
The embodiment of the liquid cooling device leakage detection device based on the flexible circuit board 1 is described in detail above, and based on the liquid cooling device leakage detection device based on the flexible circuit board 1 described in the above embodiment, the embodiment of the present invention further provides a liquid cooling device leakage detection method based on the flexible circuit board 1 corresponding to the device.
The liquid cooling equipment leakage detection method based on the flexible circuit board 1 comprises the following steps.
1) After the server is powered on, the BMC detects whether the flexible circuit board 1 is in place, and if the flexible circuit board 1 is not in place, the BMC alarms and uploads a log; if the flexible circuit board 1 is in place and no liquid leakage signal exists, the BMC informs the CPLD through the I2C that the server is normally started after receiving the power supply key signal, and if the flexible circuit board 1 is in place and a liquid leakage signal exists, the BMC sends an alarm and uploads a log, and informs the CPLD not to respond to the power supply key signal through the I2C that the server is not started.
2) If the BMC receives the liquid leakage signal in the operation process of the server, the BMC sends an alarm and uploads a log to perform shutdown protection operation of the whole machine.
The method comprises two stages: a server power-on stage and a server operation stage, wherein if a liquid leakage signal is detected in the server power-on stage, the server is refused to be started; in the operation stage of the server, if a liquid leakage signal is detected, the protection actions such as shutdown of the whole server are triggered, and the damage of a server mainboard due to short circuit caused by liquid leakage is avoided.
The above disclosure is only for the preferred embodiments of the present invention, but the present invention is not limited thereto, and any non-inventive changes that can be made by those skilled in the art and several modifications and amendments made without departing from the principle of the present invention shall fall within the protection scope of the present invention.
Claims (10)
1. A liquid-cooling equipment leakage detection device based on a flexible circuit board is characterized in that a leakage detection circuit, a plurality of detection bonding pads and a plurality of signal indicator lamps are arranged on the flexible circuit board; one detection bonding pad corresponds to one signal indicator lamp; the detection bonding pad and the signal indicator lamp are respectively electrically connected with the leakage detection circuit, and the leakage detection circuit is also electrically connected with the equipment background; the flexible circuit board is wound on the outer surface of the liquid cooling pipe, when liquid leakage occurs, the detection bonding pad detects the liquid leakage, the liquid leakage detection circuit is triggered to send a liquid leakage signal to the equipment background, and meanwhile, the corresponding signal indicator lamp is triggered to light through the liquid leakage detection circuit.
2. The liquid cooling device leakage detection device based on the flexible circuit board as claimed in claim 1, wherein the detection pad comprises a first detection sub-pad and a second detection sub-pad, when leakage occurs, the first detection sub-pad and the second detection sub-pad are short-circuited by the cooling liquid, the leakage detection circuit is triggered to send a leakage signal to the device background, and the corresponding signal indicator lamp is triggered at the same time.
3. The liquid cooling device leakage detection apparatus based on flexible circuit board as claimed in claim 2, wherein the leakage detection circuit comprises: the device comprises a first resistor, a second resistor and an optocoupler switch;
the first detection sub-pad is connected with the first end of the first resistor through the signal indicator lamp, the second end of the first resistor and the first end of the second resistor are connected to a power supply voltage, the second end of the second resistor is connected with the 2 nd pin of the optical coupling switch, the 1 st pin and the 3 rd pin of the optical coupling switch are grounded, and the 4 th pin of the optical coupling switch is connected with the second detection sub-pad;
when liquid leakage occurs, the second end of the second resistor outputs a liquid leakage signal.
4. The liquid cooling device leakage detection apparatus based on the flexible circuit board as claimed in claim 3, wherein the signal indicator light is a light emitting diode, the first detection sub-pad is connected to a negative electrode of the light emitting diode, and the first end of the first resistor is connected to a positive electrode of the light emitting diode.
5. The flexible circuit board based liquid cooling device leakage detection apparatus of claim 4, wherein the leakage detection circuit further comprises a first connector having a 1 st pin, a 2 nd pin, a 3 rd pin and a 4 th pin;
the 1 st pin outputs a power supply voltage to be connected to the second end of the first resistor and the first end of the second resistor, the 2 nd pin is connected with the second end of the second resistor, and the 3 rd pin and the 4 th pin are grounded; wherein the 4 th pin is an in-situ detection pin.
6. The liquid cooling device leakage detection device based on the flexible circuit board as claimed in claim 5, wherein the flexible circuit board comprises a TOP layer and a BOT layer, the TOP layer is arranged on the upper side, the BOT layer is arranged on the lower side, and the TOP layer contacts with the outer surface of the liquid cooling pipe; the detection bonding pad is arranged on the TOP layer, the first connector, the first resistor, the second resistor, the optical coupling switch and the signal indicator lamp are arranged on the BOT layer, and the BOT layer is subjected to insulation treatment.
7. The apparatus according to claim 6, wherein the liquid cooling device is a server.
8. The liquid cooling device leakage detection device based on the flexible circuit board as claimed in claim 7, wherein the device back refers to a motherboard of the server, and the motherboard is provided with a BMC and a CPLD;
the mainboard is also provided with a second connector, and the second connector comprises a 1 st pin, a 2 nd pin, a 3 rd pin and a 4 th pin; the first connector is plugged with the second connector;
the 1 st pin is connected with a power supply voltage, the 2 nd pin receives a leakage signal output by the first connector and outputs the leakage signal to the BMC, the 3 rd pin receives an in-place detection signal of the first connector and outputs the in-place detection signal to the BMC, and the 4 th pin is grounded;
a pull-down resistor is connected to a line between the No. 2 pin and the BMC, and a pull-up resistor is connected to a line between the No. 3 pin and the BMC.
9. The liquid cooling device leakage detection device based on flexible circuit board as claimed in claim 8, wherein the device is further configured with an external power supply, and when the device is powered off, the external power supply supplies power to the flexible circuit board.
10. A liquid cooling device liquid leakage detection method based on a flexible circuit board is characterized by comprising the following steps:
after the server is powered on, the BMC detects whether the flexible circuit board is in place, and if the flexible circuit board is not in place, the BMC alarms and uploads a log; if the flexible circuit board is in place and no leakage signal exists, the BMC informs the CPLD that the server is normally started after the CPLD receives the power supply key signal, and if the flexible circuit board is in place and the leakage signal exists, the BMC sends an alarm and uploads a log and informs the CPLD not to respond to the power supply key signal, and the server is not started;
if the BMC receives the liquid leakage signal in the operation process of the server, the BMC sends an alarm and uploads a log to perform shutdown protection operation of the whole machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211364795.5A CN115824515A (en) | 2022-11-02 | 2022-11-02 | Liquid cooling equipment leakage detection device and method based on flexible circuit board |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211364795.5A CN115824515A (en) | 2022-11-02 | 2022-11-02 | Liquid cooling equipment leakage detection device and method based on flexible circuit board |
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| Publication Number | Publication Date |
|---|---|
| CN115824515A true CN115824515A (en) | 2023-03-21 |
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|---|---|---|---|
| CN202211364795.5A Pending CN115824515A (en) | 2022-11-02 | 2022-11-02 | Liquid cooling equipment leakage detection device and method based on flexible circuit board |
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| CN (1) | CN115824515A (en) |
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- 2022-11-02 CN CN202211364795.5A patent/CN115824515A/en active Pending
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