Leakage detection system and liquid-cooled server

Abstract

This application provides a leak detection system and a liquid-cooled server. In this system, the first end of the leak detection line is connected to the first input terminal of a comparator circuit, the second input terminal of the comparator circuit is connected to a reference voltage, and the output terminal of the comparator circuit is connected to the first terminal of a leak detection control circuit. The first end of the leak detection line is also connected to the second terminal of the leak detection control circuit. The second end of the leak detection line is connected to the enable terminal of a multiplexing circuit, and the second terminal of the multiplexing circuit is connected to the third terminal of the leak detection control circuit. By setting different levels for the fourth terminal of the leak detection control circuit, the enable terminal of the multiplexing circuit is connected to the corresponding port in the multiplexing circuit. The system determines whether a leak has occurred at the leak detection line based on the level detected by the leak detection control circuit at its first terminal, and determines whether the leak detection line is broken based on the level detected by the leak detection control circuit at its third terminal. This application reduces the probability of missed detection.

Description

Technical Field

[0001] This application relates to the field of liquid-cooled server technology, and in particular to a leakage detection system and a liquid-cooled server. Background Technology

[0002] Liquid-cooled servers, as a highly efficient heat dissipation solution, are increasingly widely used in high-density computing scenarios such as data centers. To ensure the safe and stable operation of liquid-cooled servers, leak detection is typically required to promptly issue alarms in the event of coolant leakage and prevent equipment damage.

[0003] Currently, leak detection in liquid-cooled servers primarily involves wrapping a leak detection wire around the area to be detected. When the wire comes into contact with liquid, its physical parameters change accordingly, and these changes are monitored to determine if a leak has occurred. However, this method of leak detection has a relatively high probability of missing leaks. Utility Model Content

[0004] This application provides a leakage detection system and a liquid-cooled server to reduce the probability of missed detection.

[0005] On one hand, this application provides a leakage detection system, comprising:

[0006] The circuit includes a leak detection line, a multiplexing circuit, a comparator circuit, and a leak detection control circuit, among which:

[0007] The first terminal PIN1 of the leakage detection line is connected to the first input terminal INA+ of the comparator circuit, the second input terminal INA- of the comparator circuit is connected to the reference voltage, and the output terminal OUT of the comparator circuit is connected to the first terminal GPIO1 of the leakage detection control circuit. The first terminal PIN1 of the leakage detection line is also connected to the second terminal GPIO2 of the leakage detection control circuit. The second terminal PIN2 of the leakage detection line is connected to the enable terminal D of the multiplexing circuit. The first terminal S1 of the multiplexing circuit is grounded, the second terminal S2 of the multiplexing circuit is connected to the third terminal GPIO3 of the leakage detection control circuit, and the select terminal SEL of the multiplexing circuit is connected to the fourth terminal GPIO4 of the leakage detection control circuit.

[0008] When the fourth terminal GPIO4 of the leakage detection control circuit is set to the first level, the enable terminal D of the multiplexing circuit is connected to the first terminal S1 of the multiplexing circuit. When the leakage detection control circuit detects the first level at its first terminal GPIO1, it determines that leakage has occurred at the leakage detection line.

[0009] When the fourth terminal of the leakage detection control circuit is set to the second level, the enable terminal D of the multiplexing circuit is connected to the second terminal S2 of the multiplexing circuit. When the second terminal of the leakage detection control circuit is set to the first level, the leakage detection control circuit determines that the leakage detection line is broken when it detects the second level at its third terminal GPIO3. The second level is higher than the first level.

[0010] In one possible implementation, the leakage detection control circuit is also used for:

[0011] The control circuit sets the second terminal of the leak detection control circuit to output the first level to simulate a leak.

[0012] When the first level is detected by GPIO1 at the first terminal of the leakage detection control circuit, the comparison circuit is determined to be normal; when the second level is detected by GPIO1 at the first terminal of the leakage detection control circuit, the comparison circuit is abnormal.

[0013] In one possible implementation, a leakage detection connection circuit is also included;

[0014] The two ends of the leakage detection line are connected to the first input terminal and the second input terminal of the leakage detection connection circuit, respectively. The first input terminal of the leakage detection connection circuit is connected to the first output terminal of the leakage detection connection circuit. The first output terminal is connected to the first input terminal INA+ of the comparator circuit. The first output terminal is also connected to the second terminal GPIO2 of the leakage detection control circuit. The second input terminal of the leakage detection connection circuit is connected to the second output terminal of the leakage detection connection circuit. The second output terminal is connected to the enable terminal D of the multiplexing circuit.

[0015] In one possible implementation, the leakage detection connection circuit further includes a third input terminal and a fourth input terminal, a third output terminal connected to the third input terminal, and a fourth output terminal connected to the fourth input terminal, wherein:

[0016] The third and fourth input terminals are used to connect to the two ends of the leakage detection line, respectively; the third output terminal is connected to the fifth terminal GPIO5 of the leakage detection control circuit; the fourth output terminal is grounded.

[0017] The leakage detection control circuit is also used to determine that the leakage detection line and the leakage detection connection circuit are not connected when the fifth terminal GPIO5 is at the first level; and to determine that the leakage detection line and the leakage detection connection circuit are connected when the fifth terminal GPIO5 is at the second level.

[0018] In one possible implementation, a first resistor R1 is also included, with its first end connected to a power supply and its second end connected to the third output terminal of the leakage detection connection circuit.

[0019] In one possible implementation, a second resistor R2, a third resistor R3, and a fourth resistor R4 are also included, wherein:

[0020] The first end of the second resistor R2 is connected to the power supply, and the second end of the second resistor R2 is connected to the first input terminal of the comparator circuit.

[0021] The first end of the third resistor R3 is connected to the power supply, the second end of the third resistor R3 is grounded through the fourth resistor R4, and the second end of the third resistor R3 is also connected to the second input terminal of the comparator circuit.

[0022] In one possible implementation, a fifth resistor R5 and a sixth resistor R6 are also included, wherein:

[0023] The first end of the fifth resistor R5 is connected to the first end GPIO1 of the leakage detection and control circuit, and the second end of the fifth resistor R5 is connected to the output end OUT of the comparator circuit.

[0024] The first end of the sixth resistor R6 is connected to the power supply, and the second end of the sixth resistor R6 is connected to the output terminal OUT of the comparator circuit.

[0025] In one possible implementation, a seventh resistor R7 is also included, wherein the first end of the seventh resistor R7 is connected to the second end GPIO2 of the leakage detection control circuit, and the second end of the seventh resistor R7 is connected to the first end PIN1 of the leakage detection line.

[0026] In one possible implementation, the leakage detection control circuit includes a complex programmable logic device (CPLD) and / or a baseboard management controller (BMC).

[0027] On the other hand, this application provides a liquid-cooled server, comprising:

[0028] Liquid-cooled server body;

[0029] And, as described in the first aspect or possible embodiments of the first aspect, a leakage detection system wherein a leakage detection line in the leakage detection system is disposed at a leakage detection point corresponding to the liquid-cooled server body.

[0030] This application provides a leakage detection system and a liquid-cooled server, relating to the field of liquid-cooled server technology. The system includes: a leakage detection line, a multiplexing circuit, a comparator circuit, and a leakage detection control circuit. Specifically: the first terminal PIN1 of the leakage detection line is connected to the first input terminal INA+ of the comparator circuit; the second input terminal INA- of the comparator circuit is connected to a reference voltage; the output terminal OUT of the comparator circuit is connected to the first terminal GPIO1 of the leakage detection control circuit; the first terminal PIN1 of the leakage detection line is also connected to the second terminal GPIO2 of the leakage detection control circuit; the second terminal PIN2 of the leakage detection line is connected to the enable terminal D of the multiplexing circuit; the first terminal S1 of the multiplexing circuit is grounded; the second terminal S2 of the multiplexing circuit is connected to the third terminal GPIO3 of the leakage detection control circuit; and the select terminal SEL of the multiplexing circuit... Connect the fourth terminal GPIO4 of the leakage detection control circuit; when the fourth terminal GPIO4 of the leakage detection control circuit is set to the first level, the enable terminal D of the multiplexing circuit is connected to the first terminal S1 of the multiplexing circuit. When the leakage detection control circuit detects the first level at its first terminal GPIO1, it determines that leakage has occurred at the leakage detection line; when the fourth terminal of the leakage detection control circuit is set to the second level, the enable terminal D of the multiplexing circuit is connected to the second terminal S2 of the multiplexing circuit. When the second terminal of the leakage detection control circuit is set to the first level, when the leakage detection control circuit detects the second level at its third terminal GPIO3, it determines that the leakage detection line is broken, and the second level is higher than the first level. The leakage detection system provided in this application determines a break in the leakage detection line by setting a second level at the fourth terminal of the leakage detection control circuit, connecting the enable terminal of the multiplexing circuit to the second terminal of the multiplexing circuit, and determining a break in the leakage detection line when the leakage detection control circuit detects a second level at its third terminal. Conversely, by setting a first level at the fourth terminal of the leakage detection control circuit, connecting the enable terminal of the multiplexing circuit to the first terminal of the multiplexing circuit, and determining a leak at the leakage detection line when the leakage detection control circuit detects a first level at its first terminal. In summary, the leakage detection system provided in this application reduces the probability of missed detections by setting different levels to the leakage detection control circuit and observing the levels at corresponding ports to determine whether a break in the leakage detection line or a leak has occurred at the leakage detection line. Attached Figure Description

[0031] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0032] Figure 1 This is a schematic diagram of a leakage detection system provided in an embodiment of this application;

[0033] Figure 2A schematic diagram of the connection of the second resistor, the third resistor, and the fourth resistor provided in an embodiment of this application;

[0034] Figure 3 Schematic diagram of the structure of the leakage detection system provided in the embodiments of this application Figure 2 ;

[0035] Figure 4 This is a schematic diagram of the structure of a liquid-cooled server provided in an embodiment of this application.

[0036] Figure label:

[0037] PIN1: First terminal of the leakage detection line; PIN2: Second terminal of the leakage detection line; INA+: First input terminal of the comparator circuit; INA-: Second input terminal of the comparator circuit; OUT: Output terminal of the comparator circuit; D: Enable terminal of the multiplexing circuit; S1: First terminal of the multiplexing circuit; S2: Second terminal of the multiplexing circuit; SEL: Select terminal of the multiplexing circuit; GPIO1: First terminal of the leakage detection control circuit; GPIO2: Second terminal of the leakage detection control circuit; GPIO3: Third terminal of the leakage detection control circuit; GPIO4: Fourth terminal of the leakage detection control circuit; GPIO5: Fifth terminal of the leakage detection control circuit; R1: First resistor; R2: Second resistor; R3: Third resistor; R4: Fourth resistor; R5: Fifth resistor; R6: Sixth resistor; R7: Seventh resistor.

[0038] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments. Detailed Implementation

[0039] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with this application. Rather, they are merely examples of apparatuses and methods consistent with some aspects of this application as detailed in the appended claims.

[0040] Current liquid-cooled server leak detection technology primarily relies on placing leak detection devices, such as leak detection lines or leak-proof cold plates, below potential leak points. When liquid drips onto these detection devices, its physical parameters change, such as resistance and capacitance. By monitoring these changes in parameters, it is determined whether a leak has occurred in the liquid-cooled server.

[0041] However, the drawback of existing technologies is that neither the leak detection line nor the leak-proof cold plate has a self-diagnostic function, and therefore cannot determine whether its own working status is normal. This means that if the detection device itself malfunctions, such as a damaged sensor or a broken circuit, even if a liquid leak occurs, it may not be detected, resulting in a high probability of missed detection.

[0042] Specifically, for example, a leak detection plate relies on changes in material parameters caused by liquid contact. If the internal sensor of the leak detection plate malfunctions, even if liquid drips, it will not trigger an alarm, resulting in a missed detection. Similarly, if the leak detection line breaks, it will also fail to effectively detect the leak.

[0043] Therefore, to address the above problems, this application provides a leakage detection system. This system sets different voltage levels for the leakage detection control circuit and observes the voltage levels at the corresponding ports of the leakage detection control circuit to determine whether the leakage detection line is broken or whether leakage has occurred at the leakage detection line, thereby reducing the probability of missed detection by the leakage detection system.

[0044] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0045] Figure 1 This is a schematic diagram of a leakage detection system provided in an embodiment of this application. Figure 1 As shown, the leakage detection system includes: a leakage detection line, a multiplexing circuit, a comparison circuit, and a leakage detection control circuit, wherein:

[0046] The first terminal PIN1 of the leakage detection line is connected to the first input terminal INA+ of the comparator circuit, the second input terminal INA- of the comparator circuit is connected to the reference voltage, and the output terminal OUT of the comparator circuit is connected to the first terminal GPIO1 of the leakage detection control circuit. The first terminal PIN1 of the leakage detection line is also connected to the second terminal GPIO2 of the leakage detection control circuit. The second terminal PIN2 of the leakage detection line is connected to the enable terminal D of the multiplexing circuit. The first terminal S1 of the multiplexing circuit is grounded, the second terminal S2 of the multiplexing circuit is connected to the third terminal GPIO3 of the leakage detection control circuit, and the select terminal SEL of the multiplexing circuit is connected to the fourth terminal GPIO4 of the leakage detection control circuit.

[0047] When the fourth terminal GPIO4 of the leakage detection control circuit is set to the first level, the enable terminal D of the multiplexing circuit is connected to the first terminal S1 of the multiplexing circuit. When the leakage detection control circuit detects the first level at its first terminal GPIO1, it determines that leakage has occurred at the leakage detection line.

[0048] When the fourth terminal of the leakage detection control circuit is set to the second level, the enable terminal D of the multiplexing circuit is connected to the second terminal S2 of the multiplexing circuit. When the leakage detection control circuit detects the second level at its third terminal GPIO3, it determines that the leakage detection line is broken. The second level is higher than the first level.

[0049] In this embodiment, it can be understood that when detecting whether a leak has occurred, the fourth terminal (also known as the fourth pin) of the leak detection control circuit needs to be set to the first level. The enable terminal D of the multiplexing circuit is connected to the first terminal of the multiplexing circuit, so that the first end of the leak detection line is connected to the first terminal of the leak detection control circuit, and the second end of the leak detection line is grounded. The first end of the leak detection line is then connected to the first input terminal of the comparator circuit. The second input terminal of the comparator circuit is connected to a reference voltage. The output terminal of the comparator circuit compares the voltage at the first input terminal with the voltage at the second input terminal and outputs the comparison result to the first terminal of the leak detection control circuit. For example, if the voltage at the first input terminal is greater than the voltage at the second input terminal, a high level is output to the first terminal of the leak detection control circuit; if the voltage at the first input terminal is less than the voltage at the second input terminal, a low level is output to the first terminal of the leak detection control circuit.

[0050] If the first terminal of the leak detection control circuit detects a first level, it can be determined that a leak has occurred at the leak detection line; if the first terminal of the leak detection control circuit detects a second level, it can be determined that no leak has occurred at the leak detection line. The first level is a low level, and the second level is a high level.

[0051] Furthermore, when detecting abnormalities in the leakage detection line, the fourth terminal of the leakage detection control circuit needs to be set to the second level. At this time, the enable terminal D of the multiplexing circuit is connected to the second terminal of the multiplexing circuit, so that the first terminal of the leakage detection line is connected to the second terminal of the leakage detection control circuit, and the second terminal of the leakage detection line is connected to the third terminal of the leakage detection control circuit.

[0052] If the second terminal of the leak detection control circuit is set to the first level (i.e., low level), and the leak detection control circuit detects the second level at its third terminal, then it can be determined that the leak detection line is broken; if the leak detection circuit detects the first level at its third terminal, then it can be determined that the leak detection line is not broken.

[0053] It should be noted that the leak detection line is wrapped around the area where leaks are likely to occur.

[0054] Furthermore, the leakage detection and control circuitry includes complex programmable logic devices and / or a substrate management controller.

[0055] This application's embodiments reduce the probability of missed detection by setting a second level at the fourth terminal of the leak detection control circuit, thereby observing the level at the corresponding port of the multiplexing circuit. When the leak detection control circuit detects a second level at its third terminal, a break in the leak detection line is determined. Conversely, by setting a first level at the fourth terminal of the leak detection control circuit, the enable terminal of the multiplexing circuit is connected to the first terminal of the multiplexing circuit. When the leak detection control circuit detects a first level at its first terminal, a leak is determined at the leak detection line. In summary, the leak detection system provided in this application reduces the probability of missed detection by setting different levels for the leak detection control circuit and observing the levels at the corresponding ports to determine whether a break in the leak detection line or a leak has occurred at the leak detection line.

[0056] Based on the above embodiments, the above-mentioned leakage detection control circuit is further used to: control the second terminal of the leakage detection control circuit to be set to output a first level to simulate leakage; determine that the comparison circuit is normal when the first terminal GPIO1 of the leakage detection control circuit detects the first level; and determine that the comparison circuit is abnormal when the first terminal GPIO1 of the leakage detection control circuit detects a second level.

[0057] In this embodiment, it can be understood that the leak detection control circuit is used not only to determine whether a leak is detected at the leak detection line and / or whether the leak detection line is broken, but also to simulate a leak. When simulating a leak, the second terminal of the leak control circuit needs to be set to output a first level, that is, set the second terminal of the leak control circuit to output a low level.

[0058] When the second terminal of the leakage control circuit is set to output the first level, if the first level is received at the first terminal of the leakage detection control circuit, the comparison circuit is confirmed to be normal; if the second level is received at the first terminal of the leakage detection control circuit, the comparison circuit is confirmed to be abnormal.

[0059] This application embodiment sets different voltage levels at the second terminal of the leakage control circuit. Based on the voltage level received at the first terminal of the leakage detection control circuit, it determines whether the comparison circuit is normal. In this way, it simulates the leakage of a liquid-cooled server to determine whether the comparison circuit is normal, thereby reducing the chance of missed detection caused by subsequent abnormalities in the comparison circuit itself.

[0060] Based on the above embodiments, the leakage detection system provided in this application further includes: a leakage detection connection circuit; wherein, the two ends of the leakage detection line are respectively connected to the first input terminal and the second input terminal of the leakage detection connection circuit, the first input terminal of the leakage detection connection circuit is connected to the first output terminal of the leakage detection connection circuit, the first output terminal is connected to the first input terminal INA+ of the comparator circuit, and the first output terminal is also connected to the second terminal GPIO2 of the leakage detection control circuit; the second input terminal of the leakage detection connection circuit is connected to the second output terminal of the leakage detection connection circuit, and the second output terminal is connected to the enable terminal D of the multiplexing circuit.

[0061] In this embodiment, it can be understood that when the leakage detection line is connected to the second terminal of the comparator circuit and the leakage detection control circuit, it can be achieved through a leakage detection connection circuit. Specifically, the two ends of the leakage detection line are connected to the first input terminal and the second input terminal of the leakage detection circuit, respectively; the first input terminal of the leakage detection connection circuit is connected to the first output terminal of the leakage detection connection circuit, the first output terminal is connected to the first input terminal of the comparator circuit, i.e., the non-inverting input terminal, and the first output terminal is also connected to the second terminal of the leakage detection control circuit. Further, the second input terminal of the leakage detection connection circuit is connected to the second output terminal of the leakage detection connection circuit, and the second output terminal is connected to the enable terminal of the multiplexing circuit.

[0062] This application embodiment establishes a reliable electrical connection between the leak detection line and the comparison circuit by providing a leak detection connection circuit, ensuring that the leak signal can be accurately transmitted to the comparison circuit. In addition, the leak detection connection circuit provides maintenance personnel with a standardized interface, facilitating the installation, removal, and replacement of the leak detection line, making the maintenance and upgrade of the leak detection system easier.

[0063] Furthermore, the leakage detection connection circuit also includes a third input terminal and a fourth input terminal, a third output terminal connected to the third input terminal, and a fourth output terminal connected to the fourth input terminal, wherein: the third input terminal and the fourth input terminal are respectively used to connect to the two ends of the leakage detection line; the third output terminal is connected to the fifth terminal GPIO5 of the leakage detection control circuit; the fourth output terminal is grounded; the leakage detection control circuit is also used to determine that the leakage detection line is not connected to the leakage detection connection circuit when the fifth terminal GPIO5 is detected to be at the first level; and to determine that the leakage detection line is connected to the leakage detection connection circuit when the fifth terminal GPIO5 is detected to be at the second level.

[0064] To ensure the leak detection line and leak detection connection circuit are properly connected, connect the third and fourth input terminals of the leak detection circuit to the two ends of the leak detection line, respectively. Connect the third output terminal corresponding to the third input terminal to the fifth terminal of the leak detection control circuit, and ground the fourth output terminal corresponding to the fourth input terminal.

[0065] Observe the voltage level received at the fifth terminal of the leak detection control circuit. If the fifth terminal of the leak detection control circuit receives the first voltage level, it can be determined that the leak detection line is not connected to the leak detection connection circuit; if the fifth terminal of the leak detection control circuit receives the second voltage level, it can be determined that the leak detection line is connected to the leak detection connection circuit.

[0066] In this embodiment, the third and fourth input terminals are connected to the two ends of the leakage detection line, the third output terminal is connected to the fifth terminal of the leakage detection control circuit, and the fourth output terminal is grounded. This determines whether the leakage detection line is connected to the leakage detection connection circuit, which helps to reduce the probability of missed detection caused by the leakage detection line not being connected to the leakage detection connection circuit.

[0067] Furthermore, it also includes a first resistor R1, with its first end connected to a power supply and its second end connected to the third output terminal of the leak detection connection circuit. This means that when determining whether the leak detection line is connected to the leak detection connection circuit, a power supply and a first resistor are also required. The first end of the first resistor is connected to the power supply, and the second end of the first resistor is connected to the third output terminal of the leak detection circuit. This helps to stabilize the fifth terminal signal of the leak detection control circuit.

[0068] Based on the above embodiment, it also includes a second resistor R2, a third resistor R3 and a fourth resistor R4, wherein: the first end of the second resistor R2 is connected to the power supply, and the second end of the second resistor R2 is connected to the first input terminal of the comparator circuit; the first end of the third resistor R3 is connected to the power supply, the second end of the third resistor R3 is grounded through the fourth resistor R4, and the second end of the third resistor R3 is also connected to the second input terminal of the comparator circuit.

[0069] Figure 2 This is a schematic diagram showing the connection of the second, third, and fourth resistors provided in an embodiment of this application. Figure 2 It can be seen that the reference voltage mentioned above is determined by the third and fourth resistors. Specifically, the first terminal of the third resistor is connected to the power supply, the second terminal of the third resistor is grounded through the fourth resistor, and the second terminal of the third resistor is also connected to the second input terminal of the comparator circuit. This means that the fourth and third resistors are connected in series to divide the voltage, and the second input terminal of the comparator circuit is connected in parallel with the fourth resistor. That is, the voltage at the second input terminal of the comparator circuit is the voltage of the fourth resistor. The voltage at the second input terminal of the comparator circuit is a fixed value, determined by the resistance values ​​of the third and fourth resistors.

[0070] The first terminal of the second resistor is connected to the power supply, and the second terminal of the first resistor is connected to the first input terminal of the comparator circuit. This means that the second resistor and the leak detection line are connected in series to form a voltage divider, and the voltage across the leak detection line varies, determined by the impedance of the leak detection line. When the leak detection line is dry (i.e., not in contact with any leak), its impedance is very high; when it is not dry (i.e., in contact with any leak), its impedance is very low.

[0071] In this embodiment, a voltage divider circuit consisting of a second resistor and a leakage detection line is used to determine whether the leakage detection line is in contact with leakage, that is, to determine whether leakage has occurred at the leakage detection line.

[0072] Based on the above embodiment, a fifth resistor R5 and a sixth resistor R6 are also included, wherein: the first end of the fifth resistor R5 is connected to the first end GPIO1 of the leakage detection control circuit, and the second end of the fifth resistor R5 is connected to the output end OUT of the comparator circuit; the first end of the sixth resistor R6 is connected to the power supply, and the second end of the sixth resistor R6 is connected to the output end OUT of the comparator circuit.

[0073] In this embodiment, it can be understood that a fifth resistor and a sixth resistor are also connected to the output of the comparator circuit. The first end of the fifth resistor is connected to the first terminal of the leak detection control circuit, and the second end of the fifth resistor is connected to the output of the comparator circuit. The first end of the sixth resistor is connected to the power supply, and the second end of the sixth resistor is connected to the output of the comparator circuit. This connection method allows the first terminal of the leak detection control circuit to have a default state, which helps improve the stability of the signal at the first terminal of the leak detection control circuit.

[0074] Based on the above embodiments, the leakage detection system provided in this application further includes a seventh resistor R7, wherein the first end of the seventh resistor R7 is connected to the second end GPIO2 of the leakage detection control circuit, and the second end of the seventh resistor R7 is connected to the first end PIN1 of the leakage detection line. This means that the connection between the first end of the leakage detection line and the second end of the leakage detection control circuit is achieved through the seventh resistor, which helps to maintain the stability of the signal at the second end of the leakage detection control circuit.

[0075] Next, taking the LM393A comparator circuit and the TMUX1219 multiplexing circuit as an example, we will explain how to use the leakage detection system provided in the embodiments of this application.

[0076] Due to the humidity-sensitive nature of the leak detection line, its impedance changes after leakage causes a change in humidity. Therefore, this embodiment of the application uses an external hardware design of a flip-chip ball grid array (FCB) board to convert the impedance change of the leak detection line into a level change, which is then notified to the CPLD or BMC via a comparator circuit.

[0077] Figure 3 Schematic diagram of the structure of the leakage detection system provided in the embodiments of this application Figure 2 .like Figure 3 As shown, the principle of leak detection is as follows:

[0078] The first terminal of the comparator circuit is connected to PIN1 of the leak detection connection circuit. PIN1 of the leak detection connection circuit is connected to one end of the leak detection line, and the other end of the leak detection line is connected to PIN2 of the leak detection connection circuit. PIN2 of the leak detection connection circuit is connected to the multiplexing circuit, which is switched to terminal S1 by default, and terminal S1 is grounded. At this time, the leaking rope is equivalent to a resistor R0 with an impedance greater than 200KΩ.

[0079] When the liquid-cooled server is in its default state:

[0080] The voltage at the first input terminal of the comparator circuit is equal to 3.3 × (R0 / (R0 + R2)). The resistance of R2 can be set to 100K. Since the resistance of R0 is very large, the voltage at the first input terminal of the comparator circuit can be considered to be 3.3V.

[0081] It should be noted that, by default, the leak detection line is dry and insulated, so its impedance can be considered to be very high.

[0082] The voltage at the second input terminal of the comparator circuit is equal to 3.3 × (R4 / (R3 + R4)). The resistance of R3 can be set to 100KΩ, and the resistance of R4 can be set to 200KΩ. The voltage at the second input terminal of the comparator circuit is 2.2V.

[0083] Due to the characteristics of the comparator circuit, when the voltage at the first input terminal of the comparator circuit is greater than the voltage at the second input terminal of the comparator circuit, the output terminal of the comparator circuit outputs a high level; when the voltage at the first input terminal of the comparator circuit is less than the voltage at the second input terminal of the comparator circuit, the output terminal of the comparator circuit outputs a low level.

[0084] Therefore, if the GPIO1 of the CPLD or BMC receives a high level, it can be assumed that the liquid-cooled server is in normal condition and there is no leakage.

[0085] When the liquid-cooled server is experiencing leakage:

[0086] When a liquid-cooled server experiences leakage, the impedance of the leakage detection line becomes very low due to its characteristics; specifically, the resistance is less than 20 kΩ. The voltage at the first input of the comparator circuit is equal to 3.3 × (R0 / (R0 + R2)). R2 can be set to 100 kΩ. Since R0 is very small, the voltage at the first input of the comparator circuit can be considered much lower than 2.2V. The voltage at the second input of the comparator circuit is equal to 3.3 × (R4 / (R3 + R4)). R3 can be set to 100 kΩ, and R4 to 200 kΩ. The voltage at the second input of the comparator circuit remains at 2.2V.

[0087] Therefore, if the voltage at the first input terminal of the comparator circuit is less than the voltage at the second input terminal of the comparator circuit, and the first terminal of the CPLD or BMC receives a low level, it can be determined that the liquid-cooled server has experienced a leakage.

[0088] The principle of wire breakage detection is as follows:

[0089] GPIO2 of the CPLD or BMC is connected to PIN1 of the leakage detection connection circuit. PIN1 of the leakage detection connection circuit is connected to one end of the leakage detection line. The other end of the leakage detection line is then connected to PIN2 of the leakage detection connection circuit. PIN2 of the leakage detection connection circuit is connected to the multiplexing circuit. The multiplexing circuit is switched to the S2 terminal. The S2 terminal is connected to the third terminal of the CPLD or BMC.

[0090] By monitoring the level of GPIO3 on the CPLD or BMC, it can be determined whether there is a break in the leakage detection line.

[0091] Under normal, unbroken conditions, the leak detection line is as follows:

[0092] Set GPIO4 of the CPLD or BMC to high level. This connects the enable pin of the multiplexing circuit to pin S2. At this point, the pull-up resistor R8 for GPIO3 of the CPLD or BMC can be seen. When GPIO2 of the CPLD or BMC is set low, GPIO3, GPIO2, and the leak detection line form a loop. The pull-up resistor pulls the signal of GPIO3 of the CPLD or BMC low, and GPIO3 receives a low level, confirming that there is no break in the leak detection line.

[0093] Leakage detection line in case of breakage:

[0094] Since the leakage detection line is disconnected, GPIO3 and GPIO2 of the CPLD or BMC cannot form a circuit, so it can be considered that GPIO3 and GPIO2 of the CPLD or BMC are not connected.

[0095] The signal of GPIO3 of CPLD or BMC will be pulled up to 3.3V by the signal pull-up resistor R8. Therefore, GPIO3 of CPLD or BMC will receive a high level, which means that there is a break in the leakage detection line.

[0096] The principle of simulating leakage is as follows:

[0097] By monitoring the level changes of GPIO1 on the CPLD or BMC, it can be determined whether there is a liquid leakage in the liquid-cooled server.

[0098] Under normal default settings:

[0099] The voltage at the first terminal of the comparator circuit is equal to 3.3 × (R0 / (R0 + R2)). The resistance of R2 can be set to 100K. Since the resistance of R0 is very large, the voltage at the first terminal of the comparator circuit can be considered to be 3.3V.

[0100] The voltage at the second terminal of the comparator circuit is equal to 3.3 × (R4 / (R3 + R4)). The resistance of R3 can be set to 100KΩ, and the resistance of R4 can be set to 200KΩ. The voltage at the second terminal of the comparator circuit is 2.2V.

[0101] Due to the characteristics of the comparator circuit, when the voltage at the first terminal of the comparator circuit is greater than the voltage at the second terminal of the comparator circuit, the output terminal of the comparator circuit outputs a high level; when the voltage at the first terminal of the comparator circuit is less than the voltage at the second terminal of the comparator circuit, the output terminal of the comparator circuit outputs a low level.

[0102] If the GPIO1 of the CPLD or BMC receives a high level, it indicates that the liquid-cooled server is in normal condition and there is no leakage.

[0103] In a simulated leakage scenario:

[0104] The voltage at the first terminal of the comparator circuit is 0V;

[0105] The voltage at the second terminal of the comparator circuit is equal to 3.3 × (R4 / (R3 + R4)). The resistance of R3 can be set to 100KΩ, and the resistance of R4 can be set to 200KΩ. The voltage at the second terminal of the comparator circuit is 2.2V.

[0106] At this point, the voltage at the first terminal of the comparator circuit is less than the voltage at the second terminal, therefore GPIO1 of the CPLD or BMC receives a low level. If GPIO1 of the CPLD or BMC can normally receive a low level, it proves that the circuit of the leakage detection subsystem is normal.

[0107] In simulating leakage, the GPIO2 of the CPLD or BMC needs to be set to low level.

[0108] Furthermore, the truth table for TMUX1219 is shown below.

[0109]

[0110] Furthermore, the leakage detection system provided in this application embodiment can also determine whether the leakage detection line is connected to the leakage detection connector by judging the presence signal of the leakage detection line.

[0111] In summary, the leakage detection system provided in this application can determine whether a liquid-cooled server is leaking, whether the leakage detection line is broken, and whether the leakage detection line is connected to the leakage detection connector by different pin signal conditions of the CPLD or BMC. The table below shows the different pin signals of the CPLD or BMC provided in this application.

[0112]

[0113] Furthermore, the leakage detection system provided in this application embodiment can monitor whether there is leakage in the liquid cooling pipes of the liquid-cooled server. It can also perform self-checks on its own circuitry to check for broken leak detection lines and to verify the functionality of the leak detection circuitry by simulating a leaking circuit.

[0114] The purpose of the disconnection detection is to prevent the leakage detection line from being abnormally cut or torn during the assembly process, thus causing the leakage detection circuit to fail. The purpose of the simulated leakage detection is that since leakage is not allowed after the server is assembled, the circuit needs to simulate leakage to verify whether this part of the hardware is normal. In other words, the leakage detection system provided in this application embodiment can test and verify the leakage detection function of the system before the whole machine leaves the factory; it can also detect whether the leakage detection line is broken before the whole machine leaves the factory; and it can generate an alarm in the early stage of leakage, thereby protecting the user's assets and the leakage detection system.

[0115] Figure 4This is a schematic diagram of the structure of a liquid-cooled server provided in an embodiment of this application. This application provides a liquid-cooled server, including: a liquid-cooled server body 401; and a leakage detection system 402 as described in the previous embodiments, wherein a leakage detection line in the leakage detection system is disposed at a leakage detection point corresponding to the liquid-cooled server body.

[0116] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0117] In the description of the embodiments of this application, it should be understood that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection or an indirect connection through an intermediate medium, or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. The terms "upper," "lower," "front," "rear," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on this application. In the description of this application, "multiple" means two or more, unless otherwise precisely specified.

[0118] The terms "first," "second," "third," "fourth," etc., used in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that embodiments of the application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover a non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0119] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and are not intended to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A leak detection system, characterized by, include: The circuit includes a leak detection line, a multiplexing circuit, a comparator circuit, and a leak detection control circuit, among which: The first end (PIN1) of the leakage detection line is connected to the first input terminal (INA+) of the comparator circuit, the second input terminal (INA-) of the comparator circuit is connected to the reference voltage, and the output terminal (OUT) of the comparator circuit is connected to the first terminal (GPIO1) of the leakage detection control circuit. The first end (PIN1) of the leakage detection line is also connected to the second terminal (GPIO2) of the leakage detection control circuit. The second end (PIN2) of the leakage detection line is connected to the enable terminal (D) of the multiplexing circuit. The first terminal (S1) of the multiplexing circuit is grounded, the second terminal (S2) of the multiplexing circuit is connected to the third terminal (GPIO3) of the leakage detection control circuit, and the select terminal (SEL) of the multiplexing circuit is connected to the fourth terminal (GPIO4) of the leakage detection control circuit. When the fourth terminal (GPIO4) of the leakage detection control circuit is set to the first level, the enable terminal (D) of the multiplexing circuit is connected to the first terminal (S1) of the multiplexing circuit. When the leakage detection control circuit detects the first level at its first terminal (GPIO1), it determines that leakage has occurred at the leakage detection line. When the fourth terminal of the leakage detection control circuit is set to the second level, the enable terminal (D) of the multiplexing circuit is connected to the second terminal (S2) of the multiplexing circuit. When the second terminal of the leakage detection control circuit is set to the first level, the leakage detection control circuit determines that the leakage detection line is broken when it detects the second level at its third terminal (GPIO3). The second level is higher than the first level.

2. The liquid leakage detection system according to claim 1, characterized by, The leak detection and control circuit is also used for: The control circuit sets the second terminal of the leak detection control circuit to output the first level to simulate a leak. When the first level is detected at the first terminal (GPIO1) of the leakage detection control circuit, it is determined that the comparison circuit is normal. When the second level is detected at the first terminal (GPIO1) of the leakage detection control circuit, the comparison circuit malfunctions.

3. The leakage detection system according to claim 1 or 2, characterized in that, It also includes a leak detection connection circuit; The two ends of the leakage detection line are respectively connected to the first input terminal and the second input terminal of the leakage detection connection circuit. The first input terminal of the leakage detection connection circuit is connected to the first output terminal of the leakage detection connection circuit. The first output terminal is connected to the first input terminal (INA+) of the comparator circuit and is also connected to the second terminal (GPIO2) of the leakage detection control circuit. The second input terminal of the leakage detection connection circuit is connected to the second output terminal of the leakage detection connection circuit and is connected to the enable terminal (D) of the multiplexing circuit.

4. The leakage detection system according to claim 3, characterized in that, The leakage detection connection circuit also includes a third input terminal and a fourth input terminal, a third output terminal connected to the third input terminal, and a fourth output terminal connected to the fourth input terminal, wherein: The third and fourth input terminals are used to connect to the two ends of the leakage detection line, respectively; the third output terminal is connected to the fifth terminal (GPIO5) of the leakage detection control circuit; the fourth output terminal is grounded. The leakage detection control circuit is also used to determine that the leakage detection line and the leakage detection connection circuit are not connected when the fifth terminal (GPIO5) is detected to be at the first level; and to determine that the leakage detection line and the leakage detection connection circuit are connected when the fifth terminal (GPIO5) is detected to be at the second level.

5. The leakage detection system according to claim 4, characterized in that, It also includes a first resistor (R1), the first end of which is connected to the power supply, and the second end of which is connected to the third output terminal of the leakage detection connection circuit.

6. The leakage detection system according to claim 1 or 2, characterized in that, It also includes a second resistor (R2), a third resistor (R3), and a fourth resistor (R4), wherein: The first end of the second resistor (R2) is connected to the power supply, and the second end of the second resistor (R2) is connected to the first input terminal of the comparator circuit. The first end of the third resistor (R3) is connected to the power supply, the second end of the third resistor (R3) is grounded through the fourth resistor (R4), and the second end of the third resistor (R3) is also connected to the second input terminal of the comparator circuit.

7. The leakage detection system according to claim 1 or 2, characterized in that, It also includes a fifth resistor (R5) and a sixth resistor (R6), wherein: The first end of the fifth resistor (R5) is connected to the first end (GPIO1) of the leakage detection control circuit, and the second end of the fifth resistor (R5) is connected to the output end (OUT) of the comparator circuit. The first end of the sixth resistor (R6) is connected to the power supply, and the second end of the sixth resistor (R6) is connected to the output terminal (OUT) of the comparator circuit.

8. The leakage detection system according to claim 1 or 2, characterized in that, It also includes a seventh resistor (R7), wherein the first end of the seventh resistor (R7) is connected to the second end (GPIO2) of the leakage detection control circuit, and the second end of the seventh resistor (R7) is connected to the first end (PIN1) of the leakage detection line.

9. The leakage detection system according to claim 1 or 2, characterized in that, The leakage detection and control circuit includes a complex programmable logic device (CPLD) and / or a substrate management controller (BMC).

10. A liquid-cooled server, characterized in that, include: Liquid-cooled server body; And, the leakage detection system as described in any one of claims 1 to 9, wherein the leakage detection line in the leakage detection system is disposed at the leakage detection point corresponding to the liquid-cooled server body.

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