Liquid cooling device and liquid cooling system

Abstract

The utility model discloses a liquid cooling device and liquid cooling system relates to liquid cooling control technical field. Liquid cooling device includes: substrate, control circuit sets up on the substrate, a plurality of external interfaces, a plurality of external interfaces set up on the substrate, voltage conversion circuit, voltage conversion circuit sets up on the substrate, the first end of voltage conversion circuit is connected with control circuit, a plurality of external interfaces electricity respectively, second end is used for with external power electricity connection, is used for converting the first voltage of external power input into second voltage, third voltage and exports, analog-digital conversion circuit, analog-digital conversion circuit sets up on the substrate, the first end of analog-digital conversion circuit is connected with control circuit electricity, second end is connected with a plurality of external interfaces electricity, is used for converting the input analog signal into digital signal and exports. The utility model aims at reducing the design requirement of liquid cooling cabinet structure, improves the stability of signal transmission in liquid cooling device.

Description

Technical Field

[0001] This utility model relates to the field of liquid cooling control technology, and in particular to a liquid cooling device and liquid cooling system. Background Technology

[0002] As server computing power continues to increase, so does power consumption, making traditional air-cooling systems insufficient for meeting server cooling requirements. Therefore, immersion liquid cooling systems are used to dissipate heat from servers. These systems typically include sensors for liquid level, temperature, leakage, and flow. By collecting data from these sensors, the opening of the electric valve on the inlet pipe is intelligently controlled to adjust the liquid flow rate into the cooling cabinet.

[0003] However, existing immersion liquid cooling systems typically match the structure of the liquid cooling cabinet to the required sensor or other modules, thus mounting and fixing these modules onto the cabinet. This approach necessitates adjustments to the cabinet structure based on the selected modules, causing significant inconvenience. Furthermore, this method suffers from high EMC and signal quality requirements, leading to substantial errors in the measured data. Utility Model Content

[0004] The main purpose of this utility model is to provide a liquid cooling device and liquid cooling system, which aims to reduce the design requirements of the liquid cooling cabinet structure while improving the stability of signal transmission in the liquid cooling device.

[0005] To achieve the above objectives, the present invention proposes a liquid cooling device, which includes:

[0006] substrate;

[0007] A control circuit is disposed on the substrate;

[0008] Multiple external interfaces are disposed on the substrate;

[0009] A voltage conversion circuit is disposed on the substrate; a first terminal of the voltage conversion circuit is electrically connected to the control circuit and a plurality of external interfaces respectively, and a second terminal of the voltage conversion circuit is used to be electrically connected to an external power supply; the voltage conversion circuit is used to convert a first voltage input from the external power supply into a second voltage and a third voltage and output them.

[0010] An analog-to-digital converter (ADC) circuit is disposed on the substrate; a first terminal of the ADC circuit is electrically connected to the control circuit, and a second terminal of the ADC circuit is electrically connected to a plurality of external interfaces; the ADC circuit is used to convert the input analog signal into a digital signal and output it.

[0011] In one embodiment, the plurality of external interfaces include:

[0012] A terminal communication interface, wherein a first end of the terminal communication interface is electrically connected to the control circuit, and a second end of the terminal communication interface is used for electrical connection to an external terminal;

[0013] A temperature detection interface, wherein the first end of the temperature detection interface is electrically connected to the analog-to-digital conversion circuit, and the second end of the temperature detection interface is used to be electrically connected to the temperature detection module;

[0014] A flow detection interface, wherein the first end of the flow detection interface is electrically connected to the analog-to-digital conversion circuit, and the second end of the flow detection interface is used to be electrically connected to the flow detection module;

[0015] An electric valve interface, wherein the first end of the electric valve interface is electrically connected to the control circuit, and the second end of the electric valve interface is used for electrical connection to the electric valve;

[0016] A leakage detection interface is provided, wherein the first end of the leakage detection interface is electrically connected to the control circuit, and the second end of the leakage detection interface is used to electrically connect to the leakage detection module.

[0017] In one embodiment, the control circuit further includes a controller and a communication module, wherein a first end of the communication module is electrically connected to the controller, and a second end of the communication module is electrically connected to the terminal communication interface; the communication module is used to communicate with an external terminal via the terminal communication interface.

[0018] The controller and the communication module are integrated on the same chip.

[0019] In one embodiment, the liquid cooling device further includes an isolation circuit, a first end of which is electrically connected to the terminal communication interface, and a second end of which is electrically connected to the communication module; the isolation circuit is used to isolate signal noise input to the terminal communication interface.

[0020] In one embodiment, the voltage conversion circuit includes:

[0021] A first voltage conversion circuit, wherein the input terminal of the first voltage conversion circuit is electrically connected to the external power supply, and the output terminal of the first voltage conversion circuit is electrically connected to the power supply terminal of the electric valve interface and the power supply terminal of the leakage detection interface; the first voltage conversion circuit is used to convert the first voltage input from the external power supply into the second voltage and output it.

[0022] The second voltage conversion circuit has its input terminal electrically connected to the output terminal of the first voltage conversion circuit, and its output terminal electrically connected to the power supply terminal of the control circuit and the power supply terminal of the analog-to-digital conversion circuit. The second voltage conversion circuit is used to convert the second voltage output by the first voltage conversion circuit into the third voltage and output it.

[0023] In one embodiment, the liquid cooling device includes a liquid cooling cabinet containing coolant; the liquid cooling device includes a temperature detection module, the detection end of the temperature detection module is immersed in the coolant, and the output end of the temperature detection module is electrically connected to the temperature detection interface; the temperature detection module is used to detect the temperature of the coolant in the liquid cooling cabinet and output a temperature detection signal.

[0024] In one embodiment, the liquid-cooled cabinet includes an inlet and an outlet; the liquid-cooling device further includes a flow detection module, which is disposed at the inlet or the outlet, and the output terminal of the flow detection module is electrically connected to the flow detection interface; the flow detection module is used to detect the flow rate of the coolant in the liquid-cooled cabinet and output a flow detection signal.

[0025] In one embodiment, the liquid cooling device further includes an electric valve disposed at the water outlet; the controlled end of the electric valve is electrically connected to the control circuit; the electric valve is used to receive a valve port control signal output by the control circuit to adjust the valve port opening.

[0026] The control circuit is used to receive the temperature detection signal and / or the flow detection signal to adjust the valve opening.

[0027] In one embodiment, the liquid cooling device further includes a leakage detection module, the output of which is electrically connected to the leakage detection interface; the leakage detection module is used to detect the airtightness of the liquid cooling cabinet containing coolant and output a leakage detection signal.

[0028] This utility model also proposes a liquid cooling system, which includes an external terminal and a liquid cooling device as described in any of the above claims;

[0029] The external terminal is electrically connected to the terminal communication interface.

[0030] This utility model's technical solution employs a liquid cooling device, which reduces the design requirements of the liquid-cooled cabinet structure while improving the stability of signal transmission within the liquid cooling device. The liquid cooling device includes a base plate, a control circuit, multiple external interfaces, a voltage conversion circuit, and an analog-to-digital conversion circuit. By housing the control circuit, multiple external interfaces, voltage conversion circuit, and analog-to-digital conversion circuit all on the base plate, the structure of the liquid-cooled cabinet does not need to be adjusted for replacing modules such as the control circuit, external interfaces, voltage conversion circuit, and analog-to-digital conversion circuit. Only the corresponding modules on the base plate need to be adjusted. This avoids the problem in existing technologies where modules are located on the liquid-cooled cabinet, requiring corresponding adjustments to the cabinet structure to match the module structure when modules need to be replaced. Furthermore, this method also unifies the planar ground plane (base plate), significantly reducing common-mode noise. Furthermore, when the substrate uses a uniform planar ground plane as the reference plane for all signals, filtering, shielding, and layout routing optimization can be performed centrally, avoiding inconsistent EMC countermeasures that could lead to overall exceeding of standards when each module is designed independently. It can also unify the impedance of each module, thereby effectively avoiding signal reflection and data errors caused by impedance mismatch. Attached Figure Description

[0031] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0032] Figure 1 This is a schematic diagram of the liquid cooling device of this utility model;

[0033] Figure 2 This is a schematic diagram of a module of an embodiment of the liquid cooling device of this utility model;

[0034] Figure 3 This is a circuit diagram of an embodiment of the liquid cooling device of this utility model;

[0035] Figure 4 This is a circuit diagram of yet another embodiment of the liquid cooling device of this utility model;

[0036] Figure 5 This is a circuit diagram of one embodiment of the liquid cooling device of this utility model;

[0037] Figure 6 Here is a circuit diagram of another embodiment of the liquid cooling device of this utility model;

[0038] Figure 7This is a circuit diagram of another embodiment of the liquid cooling device of this utility model.

[0039] Explanation of icon numbers:

[0040] 10. Substrate; 20. Control circuit; 30. External interface; 31. Terminal communication interface; 32. Temperature detection interface; 33. Flow detection interface; 34. Electric valve interface; 35. Leakage detection interface; 40. Voltage conversion circuit; 41. First voltage conversion circuit; 42. Second voltage conversion circuit; 50. Analog-to-digital conversion circuit; 60. Isolation circuit.

[0041] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0042] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0043] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0044] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0045] As server computing power continues to increase, so does power consumption, making traditional air-cooling systems insufficient for meeting server cooling requirements. Therefore, immersion liquid cooling systems are used to dissipate heat from servers. These systems typically include sensors for liquid level, temperature, leakage, and flow. By collecting data from these sensors, the opening of the electric valve on the inlet pipe is intelligently controlled to adjust the liquid flow rate into the cooling cabinet.

[0046] However, existing immersion liquid cooling systems typically match the structure of the liquid cooling cabinet to the required sensor or other modules, thus mounting and fixing these modules onto the cabinet. This approach necessitates adjustments to the cabinet structure based on the selected modules, causing significant inconvenience. Furthermore, this method suffers from high EMC and signal quality requirements, leading to substantial errors in the measured data.

[0047] To solve the above problems, refer to Figure 1 This utility model proposes a liquid cooling device, characterized in that the liquid cooling device comprises:

[0048] substrate 10;

[0049] Control circuit 20, the control circuit 20 being disposed on the substrate 10;

[0050] Multiple external interfaces 30 are disposed on the substrate 10;

[0051] A voltage conversion circuit 40 is disposed on the substrate 10; the first terminal of the voltage conversion circuit 40 is electrically connected to the control circuit 20 and the plurality of external interfaces 30 respectively, and the second terminal of the voltage conversion circuit 40 is used to be electrically connected to an external power supply; the voltage conversion circuit 40 is used to convert the first voltage input from the external power supply into a second voltage and a third voltage and output them.

[0052] An analog-to-digital converter circuit 50 is disposed on the substrate 10; the first end of the analog-to-digital converter circuit 50 is electrically connected to the control circuit 20, and the second end of the analog-to-digital converter circuit 50 is electrically connected to a plurality of external interfaces 30; the analog-to-digital converter circuit 50 is used to convert the input analog signal into a digital signal and output it.

[0053] In this embodiment, the substrate 10 serves as the physical support and electrical platform for carrying electronic components and interconnecting lines. The substrate 10 can be made of materials such as glass fiber reinforced epoxy resin, polytetrafluoroethylene (PTFE), or a ceramic substrate. It is understood that the substrate 10, as the physical support and electrical platform for carrying electronic components and interconnecting lines, can be disposed on one side of the liquid-cooled cabinet. The shape and structure of the side of the liquid-cooled cabinet corresponding to the substrate 10 only needs to be a plane corresponding to the shape of the substrate 10. No structural adjustments are required for each module disposed on the substrate 10, effectively avoiding the need for synchronous adjustments to the liquid-cooled cabinet structure due to changes in module selection.

[0054] In this embodiment, the control circuit 20 can be implemented using an FPGA (Field Programmable Gate Array), PLC (Programmable Logic Controller), MCU (Microcontroller Unit), DSP (Digital Signal Processor), or SOC (System on Chip). The control circuit 20 is mounted on the substrate 10 and electrically connected to other circuit modules or interfaces via traces on the substrate 10, thereby enabling signal acquisition and output.

[0055] In this embodiment, the multiple external interfaces 30 may include communication interfaces, detection signal feedback interfaces, power interfaces, etc. All external interfaces 30 are disposed on the substrate 10 and are electrically connected to the control circuit 20 directly or indirectly via traces, thereby enabling the interaction of external data with the control circuit 20.

[0056] In this embodiment, the voltage conversion circuit 40 can be implemented using a boost circuit, a buck circuit, a voltage regulator circuit, etc. It is understood that the input terminal of the voltage conversion circuit 40 is electrically connected to an external power supply to obtain a first external input voltage; the output terminal of the voltage conversion circuit 40 is electrically connected to the control circuit 20, the external interface 30, and the analog-to-digital converter circuit 50, thereby converting the first external input voltage into a second and third voltage to power the external interface 30, the control circuit 20, and the analog-to-digital converter circuit 50, respectively. Therefore, the selection of the voltage conversion circuit 40 needs to be based on the magnitude of the first external power supply input voltage and the supply voltages (i.e., the second and third voltages) of the external interface 30, the control circuit 20, and the analog-to-digital converter circuit 50. For example, when the first external power supply input voltage is less than the second and third voltages, the voltage conversion circuit 40 needs to be implemented using a boost circuit; when the first external power supply input voltage is greater than the second and third voltages, the voltage conversion circuit 40 needs to be implemented using a buck circuit.

[0057] Understandably, liquid cooling devices typically include functional modules with detection capabilities, such as temperature detection modules and flow detection modules. These modules are electrically connected to the control circuit 20 via external interfaces 30 on the substrate 10, thereby outputting corresponding detection signals to the control circuit 20. It is important to note that the detection signals output by these functional modules are mostly analog signals, while the control circuit 20 can only receive digital signals. Therefore, a corresponding analog-to-digital converter 50 is required between these external interfaces 30 and the control circuit 20 to ensure that the detection signals received by the control circuit 20 are digital signals.

[0058] This invention employs a liquid cooling device, which reduces the design requirements of the liquid-cooled cabinet structure while improving the stability of signal transmission within the liquid cooling device. The liquid cooling device includes a substrate 10, a control circuit 20, multiple external interfaces 30, a voltage conversion circuit 40, and an analog-to-digital conversion circuit 50. By mounting the control circuit 20, multiple external interfaces 30, voltage conversion circuit 40, and analog-to-digital conversion circuit 50 all on the substrate 10, the structural design of the liquid-cooled cabinet does not require adjustments based on the replacement of modules such as the control circuit 20, multiple external interfaces 30, voltage conversion circuit 40, and analog-to-digital conversion circuit 50. Only the corresponding modules on the substrate need to be adjusted, avoiding the need for structural adjustments to match the cabinet structure required in existing technologies where modules are mounted on the liquid-cooled cabinet for module replacement. Furthermore, this method unifies the planar ground plane (substrate), significantly reducing common-mode noise. Furthermore, when the substrate uses a uniform planar ground plane as the reference plane for all signals, filtering, shielding, and layout routing optimization can be performed centrally, avoiding inconsistent EMC countermeasures that could lead to overall exceeding of standards when each module is designed independently. It can also unify the impedance of each module, thereby effectively avoiding signal reflection and data errors caused by impedance mismatch.

[0059] refer to Figure 2 In one embodiment of this utility model, the plurality of external interfaces 30 include:

[0060] Terminal communication interface 31, the first end of which is electrically connected to the control circuit 20, and the second end of which is used for electrical connection with an external terminal;

[0061] Temperature detection interface 32, the first end of which is electrically connected to the analog-to-digital conversion circuit 50, and the second end of which is electrically connected to the temperature detection module;

[0062] A flow detection interface 33, the first end of which is electrically connected to the analog-to-digital conversion circuit 50, and the second end of which is electrically connected to the flow detection module;

[0063] Electric valve interface 34, the first end of which is electrically connected to the control circuit 20, and the second end of which is used to be electrically connected to the electric valve;

[0064] Leakage detection interface 35, the first end of which is electrically connected to the control circuit 20, and the second end of which is used to be electrically connected to the leakage detection module.

[0065] It is understood that liquid cooling systems typically include a temperature detection module, a flow detection module, an electric valve, and a leakage detection module. Furthermore, the control circuit 20 within the liquid cooling system may also need to establish a communication connection with an external terminal. Therefore, the multiple external interfaces 30 include a temperature detection interface 32, a flow detection interface 33, an electric valve interface 34, a leakage detection interface 35, and a terminal communication interface 31. The terminal communication interface 31 can be implemented using an RS485 communication interface, an RS422 communication interface, etc. In this embodiment, the temperature detection interface 32, flow detection interface 33, electric valve interface 34, leakage detection interface 35, and terminal communication interface 31 are selected and configured according to the temperature detection module, flow detection module, electric valve, leakage detection module in the liquid cooling system, and the model of the external terminal. In this embodiment, the control circuit 20 can confirm the temperature of the coolant in the liquid cooling cabinet by receiving the temperature detection signal input from the temperature detection interface 32. After confirming the temperature of the coolant in the liquid-cooled cabinet, the control circuit 20 outputs a corresponding control signal to the electric valve interface 34 to adjust the valve opening of the electric valve accordingly. For example, if the temperature detected by the temperature detection signal received by the control circuit 20 through the temperature detection interface 32 is higher than the preset temperature, the control circuit 20 outputs a corresponding control signal through the electric valve interface 34 to the electric valve to increase the valve opening, thereby increasing the flow rate of the coolant in the liquid-cooled cabinet and thus lowering the temperature of the coolant in the liquid-cooled cabinet.

[0066] Alternatively, the specific circuitry for the flow detection interface 33 can be found in [reference needed]. Figure 3 LS_SENSOR_1, LS_SENSOR_2, LS_SENSOR_3, LS_SENSOR_4, and FS_SENSOR_1 are the input terminals for the flow detection signal. The flow detection module inputs a 4-20mA current signal to the control circuit 20 through the flow detection interface 33. According to Ohm's law U=I*R, the current signal will generate a voltage signal when flowing through the onboard reference resistor. The voltage signal is connected to the pin of the analog-to-digital converter circuit 50. The analog-to-digital converter circuit 50 writes the voltage value input to the corresponding pin into the corresponding internal register. The control circuit 20 accesses the internal register of the analog-to-digital converter circuit 50 through the SPI protocol, reads the pin voltage, and calculates the current current value. Combined with the "current and status correspondence table" of the external flow detection module, the current status of the flow detection module can be obtained to complete the acquisition of the data corresponding to the flow detection signal.

[0067] Optionally, the specific circuitry for the leak detection interface 35 can be found in [reference needed]. Figure 4 LD_FB_1_N is electrically connected to control circuit 20. When LD_FB_1_N is low, it confirms that the liquid cooling device is leaking; when LD_FB_1_N is high, it confirms that the liquid cooling device is not leaking.

[0068] Alternatively, the specific circuit of the electric valve interface 34 can be found in [reference needed]. Figure 5 The control circuit 20 calculates a PWM signal of 0-100 based on the temperature detection signal and / or flow detection signal using a given algorithm and outputs it to U17. U17 adjusts the output voltage value according to different PWM input values. The voltage is then supplied to the electric valve through the electric valve interface 34, so that the electric valve adjusts its opening degree according to different voltages, thereby adjusting the flow rate of the liquid cooling cabinet.

[0069] refer to Figure 2 In one embodiment of the present invention, the control circuit 20 further includes a controller and a communication module. The first end of the communication module is electrically connected to the controller, and the second end of the communication module is electrically connected to the terminal communication interface 31. The communication module is used to communicate with an external terminal via the terminal communication interface 31.

[0070] The controller and the communication module are integrated on the same chip.

[0071] In this embodiment, the controller can be implemented using an MCU (Microcontroller Unit), DSP (Digital Signal Processor), FPGA (Field Programmable Gate Array), or SOC (System-on-Chip). The communication module can be implemented using a communication signal conversion circuit corresponding to the type of the terminal communication interface 31; for example, it can be an RS485 or RS422 communication module. By electrically connecting the first end of the communication module to the controller and the second end to the terminal communication interface 31, communication between the external terminal and the control circuit 20 in the liquid cooling device is achieved. In practical applications, the controller and communication module can be integrated on the same chip to improve the integration of circuit modules on the substrate 10 and effectively utilize the available space.

[0072] Optionally, the communication module is an RS485 communication module; for specific circuit details, please refer to [reference needed]. Figure 6 RS485_A and RS485_A are electrically connected to the terminal communication interface 31, and USART0_TXD_R and USART0_RXD_R are electrically connected to the control circuit 20 to convert UART signals into RS485 signals.

[0073] refer to Figure 2In one embodiment of the present invention, the liquid cooling device further includes an isolation circuit 60, the first end of which is electrically connected to the terminal communication interface 31, and the second end of which is electrically connected to the communication module; the isolation circuit 60 is used to isolate the signal noise input to the terminal communication interface 31.

[0074] It is understandable that when using an RS485 communication module, due to the long-distance communication capabilities of RS485, multiple devices are connected via a bus. When these devices are distributed in different locations, the grounding potentials in each location may differ, leading to common-mode noise current flowing between the RS485 signal line and the ground line, causing communication errors and data loss. Therefore, in this embodiment, an isolation circuit 60 is provided between the terminal communication interface 31 and the communication circuit to isolate the DC power connection between the devices, especially the direct connection of the ground lines. This ensures that the ground potentials of the two devices are different and prevents the formation of current loops, thereby eliminating noise caused by ground potential differences. Furthermore, the isolation circuit 60 has high common-mode transient immunity, capable of resisting rapidly changing common-mode voltage interference, thus effectively improving the stability of communication between the liquid cooling device and the external terminal. Optionally, specific circuit references... Figure 7 USART0_TXD_R and USART0_RXD_R are electrically connected to the communication module, while USART0_TX and USART0_RX are electrically connected to the main control circuit to achieve digital isolation. ISO1 is an optocoupler.

[0075] refer to Figure 2 In one embodiment of this utility model, the voltage conversion circuit 40 includes:

[0076] A first voltage conversion circuit 41 has an input terminal for electrical connection to the external power supply, and an output terminal for electrical connection to the power supply terminal of the electric valve interface 34 and the power supply terminal of the leakage detection interface 35. The first voltage conversion circuit 41 is used to convert the first voltage input from the external power supply into a second voltage and output it.

[0077] The second voltage conversion circuit 42 has its input terminal electrically connected to the output terminal of the first voltage conversion circuit 41, and its output terminal electrically connected to the power supply terminal of the control circuit 20 and the power supply terminal of the analog-to-digital conversion circuit 50. The second voltage conversion circuit 42 is used to convert the second voltage output by the first voltage conversion circuit 41 into a third voltage and output it.

[0078] In this embodiment, both the first voltage conversion circuit 41 and the second voltage conversion circuit 42 can be implemented using boost circuits, buck circuits, or voltage regulator circuits. The input terminal of the first voltage conversion circuit 41 is electrically connected to an external power supply to obtain a first voltage input from the external power supply. This first voltage is then converted by the first voltage conversion circuit 41 and output as a second voltage to the power supply terminals of the electric valve interface 34, the leakage detection interface 35, and the input terminal of the second voltage conversion circuit 42. The input terminal of the second voltage conversion circuit 42 is electrically connected to the output terminal of the first voltage conversion circuit 41 to obtain the first voltage output from the first voltage conversion circuit 41. This second voltage is then converted by the second voltage conversion circuit 42 and output as a third voltage to the power supply terminals of the control circuit 20 and the analog-to-digital converter circuit 50. For example, the first voltage input from the external power supply is 24V DC, the second voltage is 12V DC, and the third voltage is 5V DC. In this case, both the first voltage conversion circuit 41 and the second voltage conversion circuit 42 are buck circuits. It should be noted that the control circuit 20 and the analog-to-digital converter circuit 50 are typically supplied with a voltage of 3.3V. Therefore, a linear regulated voltage is also connected to the output terminal of the second voltage conversion circuit 42 to stabilize the 5V DC voltage to 3.3V and supply power to the control circuit 20, analog-to-digital conversion circuit 50, etc.

[0079] In one embodiment of the present invention, the liquid cooling device includes a liquid cooling cabinet containing coolant; the liquid cooling device includes a temperature detection module, the detection end of the temperature detection module is immersed in the coolant, and the output end of the temperature detection module is electrically connected to the temperature detection interface 32; the temperature detection module is used to detect the temperature of the coolant in the liquid cooling cabinet and output a temperature detection signal.

[0080] In this embodiment, the temperature detection module can be implemented using a detection circuit based on a thermistor, such as a resistor voltage divider circuit based on an NTC resistor or an NTC probe, or a resistor voltage divider circuit based on a PTC resistor or a PTC probe. Optionally, the temperature detection module can also be implemented using a temperature sensor, such as an infrared temperature sensor or a thermocouple temperature sensor. It is understood that the liquid cooling device includes a liquid-cooled cabinet containing coolant to house devices requiring heat dissipation, such as servers. It is understood that the coolant is a dielectric fluid, which has extremely high resistivity and is non-conductive. Therefore, it can directly contact the server's CPU, GPU, memory, motherboard, and other electronic components without causing short circuits or damage. Commonly used coolants include synthetic fluorinated liquids or silicone oils. The server is completely or partially immersed in the liquid-cooled cabinet containing coolant. When the server is running, high-power components such as the CPU and GPU generate a large amount of heat. This heat is transferred to the surrounding coolant through direct heat conduction. Because the specific heat capacity of the liquid is much higher than that of air, it can more effectively absorb and remove heat. However, this also causes the coolant's own temperature to rise, thus reducing its cooling effect on the server. Therefore, it is necessary to lower the coolant temperature when it reaches a certain level to ensure effective cooling of the server. By setting up a temperature detection module and immersing its detection end in the coolant, the coolant temperature can be accurately obtained, and a corresponding temperature detection signal can be output to the control circuit 20. The control circuit 20 can then confirm the coolant temperature in the liquid-cooled cabinet and adjust the opening of the electric valve, thereby changing the coolant flow rate to adjust the coolant temperature. For example, when the temperature corresponding to the temperature detection signal output by the temperature detection module reaches a preset temperature threshold, the control circuit 20 will output a corresponding valve control signal to the electric valve to widen the valve opening, thereby increasing the coolant flow rate and lowering the coolant temperature, effectively ensuring the cooling effect of the liquid-cooled cabinet on the server.

[0081] Optionally, the liquid cooling unit may include multiple liquid cooling cabinets containing coolant.

[0082] In one embodiment of this utility model, the liquid cooling cabinet includes an inlet and an outlet; the liquid cooling device further includes a flow detection module, which is disposed at the inlet or the outlet, and the output end of the flow detection module is electrically connected to the flow detection interface 33; the flow detection module is used to detect the flow rate of the coolant in the liquid cooling cabinet and output a flow detection signal.

[0083] In this embodiment, the flow detection module can be implemented using a flow meter to detect the flow rate of the coolant in the liquid-cooled cabinet. As described above, the control circuit 20 adjusts the opening size of the electric valve based on the temperature detection signal output by the temperature detection module, thereby changing the coolant flow rate. However, to confirm whether the coolant flow rate change corresponds to the electric valve opening size, a flow detection module is needed. This flow detection module is located at the inlet or outlet to detect the coolant flow rate in the pipes, thus confirming whether the electric valve opening size corresponds. Furthermore, the flow detection signal can also be used to confirm whether there are any abnormalities such as blockages in the pipes of the liquid-cooled device. Optionally, a liquid level detection module can also be installed in the liquid-cooled cabinet. This module detects the height of the coolant in the cabinet and outputs a liquid level detection signal. The control circuit 20 can use the liquid level detection signal to confirm the coolant flow rate, and thus confirm whether the electric valve opening size corresponds.

[0084] In one embodiment of this utility model, the liquid cooling device further includes an electric valve, which is disposed at the water outlet; the controlled end of the electric valve is electrically connected to the control circuit 20; the electric valve is used to receive the valve port control signal output by the control circuit 20 to adjust the opening degree of the valve port.

[0085] The control circuit 20 is used to receive the temperature detection signal and / or the flow detection signal to adjust the opening of the valve.

[0086] In this embodiment, an electric valve is positioned between the inlet and outlet of the liquid cooling device to control the flow of coolant in the liquid cooling cabinet. The controlled end of the electric valve is electrically connected to the control circuit 20, thereby controlling the flow rate of coolant in the liquid cooling cabinet by receiving valve control signals output by the control circuit 20. It is understood that the control circuit 20 will output corresponding valve control signals to the electric valve based on temperature detection signals and / or flow rate detection signals to adjust the valve opening, i.e., adjust the size of the electric valve opening. For example, when the temperature corresponding to the temperature detection signal output by the temperature detection module reaches a preset temperature threshold, the control circuit 20 will output a corresponding valve control signal to the electric valve to increase the opening of the electric valve, thereby increasing the flow rate of the coolant and reducing the temperature of the coolant, effectively ensuring the heat dissipation effect of the liquid cooling cabinet on the server. When the coolant flow rate corresponding to the flow rate detection signal output by the flow rate detection signal is lower than a preset flow rate threshold, a corresponding valve control signal is output to the electric valve to increase the opening of the electric valve, thereby increasing the flow rate of the coolant to the preset flow rate threshold.

[0087] In one embodiment of the present invention, the liquid cooling device further includes a leakage detection module, the output end of which is electrically connected to the leakage detection interface 35; the leakage detection module is used to detect the sealing status of the liquid cooling cabinet containing coolant and output a leakage detection signal.

[0088] In this embodiment, the leak detection module can be implemented using a pressure detection module or an optocoupler detection module and a leak-receiving component. It is understood that the liquid cooling device includes a liquid cooling cabinet containing coolant, with an inlet and an outlet, and an electric valve is installed between the inlet and outlet. Therefore, there is a risk of leakage in the liquid cooling device. By setting up a leak detection module, a leak detection signal is output to the control circuit 20 when a leak occurs, causing the control circuit 20 to perform a corresponding action. For example, the control circuit 20 outputs a corresponding control signal to the prompting module, causing the prompting module to output a corresponding prompt signal to alert the user that there is a leak in the liquid cooling device. Here, we take the implementation of the leak detection module using an optocoupler detection module and a leak-receiving component as an example. The leak-receiving component is located below the liquid cooling cabinet to receive and collect the leaked coolant when a leak occurs in the liquid cooling cabinet. The optocoupler detection module is installed inside the leakage receiving assembly to detect whether coolant is present inside the leakage receiving assembly. When coolant is detected inside the leakage receiving assembly, the optocoupler detection signal is output to the control circuit 20.

[0089] This utility model also proposes a liquid cooling system, which includes an external terminal and a liquid cooling device as described in any of the above claims;

[0090] The external terminal is electrically connected to the terminal communication interface 31.

[0091] In this embodiment, the liquid cooling device can be electrically connected to an external terminal via the terminal communication interface 31 to enable data interaction between the liquid cooling device and the external terminal. For example, the user can use the external terminal to check the temperature of the coolant in the liquid cooling device, whether there is any blockage in the pipes, or whether there is any leakage.

[0092] It is worth noting that since the liquid cooling system of this utility model is based on the above-mentioned liquid cooling device, the embodiments of the liquid cooling system of this utility model include all the technical solutions of all the embodiments of the above-mentioned liquid cooling device, and the technical effects achieved are exactly the same, so they will not be repeated here.

[0093] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A liquid cooling device, characterized in that, The liquid cooling device includes: substrate; A control circuit is disposed on the substrate; Multiple external interfaces are disposed on the substrate; A voltage conversion circuit is disposed on the substrate; a first terminal of the voltage conversion circuit is electrically connected to the control circuit and a plurality of external interfaces respectively, and a second terminal of the voltage conversion circuit is used to be electrically connected to an external power supply; the voltage conversion circuit is used to convert a first voltage input from the external power supply into a second voltage and a third voltage; An analog-to-digital converter (ADC) circuit is disposed on the substrate; a first terminal of the ADC circuit is electrically connected to the control circuit, and a second terminal of the ADC circuit is electrically connected to a plurality of external interfaces; the ADC circuit is used to convert input analog signals into digital signals.

2. The liquid cooling device as described in claim 1, characterized in that, The plurality of external interfaces include: A terminal communication interface, wherein a first end of the terminal communication interface is electrically connected to the control circuit, and a second end of the terminal communication interface is used for electrical connection to an external terminal; A temperature detection interface, wherein the first end of the temperature detection interface is electrically connected to the analog-to-digital conversion circuit, and the second end of the temperature detection interface is used to be electrically connected to the temperature detection module; A flow detection interface, wherein the first end of the flow detection interface is electrically connected to the analog-to-digital conversion circuit, and the second end of the flow detection interface is used to be electrically connected to the flow detection module; An electric valve interface, wherein the first end of the electric valve interface is electrically connected to the control circuit, and the second end of the electric valve interface is used for electrical connection to the electric valve; A leakage detection interface is provided, wherein the first end of the leakage detection interface is electrically connected to the control circuit, and the second end of the leakage detection interface is used to electrically connect to the leakage detection module.

3. The liquid cooling device as described in claim 2, characterized in that, The control circuit further includes a controller and a communication module. A first end of the communication module is electrically connected to the controller, and a second end of the communication module is electrically connected to the terminal communication interface. The communication module is used to communicate with an external terminal via the terminal communication interface. The controller and the communication module are integrated on the same chip.

4. The liquid cooling device as described in claim 3, characterized in that, The liquid cooling device further includes an isolation circuit, the first end of which is electrically connected to the terminal communication interface, and the second end of which is electrically connected to the communication module; the isolation circuit is used to isolate signal noise input to the terminal communication interface.

5. The liquid cooling device as described in claim 2, characterized in that, The voltage conversion circuit includes: A first voltage conversion circuit, wherein the input terminal of the first voltage conversion circuit is electrically connected to the external power supply, and the output terminal of the first voltage conversion circuit is electrically connected to the power supply terminal of the electric valve interface and the power supply terminal of the leakage detection interface; the first voltage conversion circuit is used to convert the first voltage input from the external power supply into the second voltage and output it. The second voltage conversion circuit has its input terminal electrically connected to the output terminal of the first voltage conversion circuit, and its output terminal electrically connected to the power supply terminal of the control circuit and the power supply terminal of the analog-to-digital conversion circuit. The second voltage conversion circuit is used to convert the second voltage output by the first voltage conversion circuit into the third voltage and output it.

6. The liquid cooling device according to any one of claims 2 to 5, characterized in that, The liquid cooling device includes a liquid cooling cabinet containing coolant; the liquid cooling device includes a temperature detection module, the detection end of the temperature detection module is immersed in the coolant, and the output end of the temperature detection module is electrically connected to the temperature detection interface. The temperature detection module is used to detect the temperature of the coolant in the liquid-cooled cabinet and output a temperature detection signal.

7. The liquid cooling device as described in claim 6, characterized in that, The liquid cooling cabinet includes a water inlet and a water outlet; the liquid cooling device also includes a flow detection module, which is located at the water inlet or the water outlet, and the output of the flow detection module is electrically connected to the flow detection interface. The flow detection module is used to detect the flow rate of the coolant in the liquid cooling cabinet and output a flow detection signal.

8. The liquid cooling device as described in claim 7, characterized in that, The liquid cooling device also includes an electric valve, which is located at the water outlet; the controlled end of the electric valve is electrically connected to the control circuit; the electric valve is used to receive the valve port control signal output by the control circuit to adjust the valve port opening. The control circuit is used to receive the temperature detection signal and / or the flow detection signal, and output the corresponding valve port control signal to adjust the valve port opening.

9. The liquid cooling device according to any one of claims 2 to 5, characterized in that, The liquid cooling device also includes a leakage detection module, the output of which is electrically connected to the leakage detection interface; the leakage detection module is used to detect the airtightness of the liquid cooling cabinet containing coolant and output a leakage detection signal.

10. A liquid cooling system, characterized in that, The liquid cooling system includes an external terminal and a liquid cooling device as described in any one of claims 2 to 9; The external terminal is electrically connected to the terminal communication interface.

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