Liquid cooling test load pressure detection device and method based on differential pressure calculation

Abstract

The present application relates to liquid cooling data center load test technical field, provide a kind of liquid cooling test load pressure detection device and method based on differential pressure calculation.It comprises water inlet pressure sensor, differential pressure transmitter and resistance module unit, resistance module unit has liquid inlet end and liquid outlet end, heat dissipation medium flows into resistance module unit from liquid inlet end and generates pressure drop after flowing out from liquid outlet end;Water inlet pressure sensor is installed at liquid inlet end and communicates with liquid inlet end, for detecting water inlet pressure;The high-pressure side interface of differential pressure transmitter communicates with liquid inlet end, the low-pressure side interface communicates with liquid outlet end, differential pressure transmitter is connected between liquid inlet end and liquid outlet end, for detecting differential pressure;Heat dissipation medium flows through resistance module unit and generates pressure drop, obtains water outlet pressure by water inlet pressure and differential pressure, obtains liquid inlet pressure, liquid outlet pressure and differential pressure simultaneously.The present application reduces the number of pressure sensors, eliminates the consistency error of double sensors, reduces hardware cost, simplifies installation and maintenance.

Description

Technical Field

[0001] This invention relates to the field of liquid-cooled data center load testing technology, and in particular to a liquid-cooled test load pressure detection device and method based on differential pressure calculation. Background Technology

[0002] As artificial intelligence and intelligent computing centers evolve towards higher density and efficiency, liquid cooling has become a major technological direction for meeting the heat dissipation performance requirements of data centers. Liquid-cooled data center technology has been widely applied in finance, the internet, cloud computing, big data, and other fields, and will continue to expand to more application scenarios. With the maturity of liquid-cooled data center technology, the testing requirements for liquid cooling systems have increased significantly. As a key device in liquid cooling system testing, the accuracy of pressure detection on the liquid-cooled test load directly affects the test results.

[0003] Existing liquid-cooled test loads require one pressure sensor at each of the inlet and outlet for pressure testing. The inlet pressure sensor detects the inlet pressure, and the outlet pressure sensor detects the outlet pressure. The pressure difference between the inlet and outlet is then calculated. This current solution requires two pressure sensors, resulting in high hardware costs. Inconsistency errors exist between the two sensors, reducing test accuracy. The large number of pressure sensors leads to more potential failure points and poor system stability. Furthermore, the installation and maintenance of two pressure sensors are labor-intensive, complicating future maintenance.

[0004] Therefore, there is an urgent need to provide a liquid-cooled test load pressure detection solution that can reduce the number of pressure sensors, obtain inlet pressure, outlet pressure and differential pressure, reduce hardware costs and improve test accuracy. Summary of the Invention

[0005] This invention provides a liquid-cooled test load pressure detection device and method based on differential pressure calculation, aiming to solve the problems of high hardware cost, large sensor consistency error, many failure points, and large installation and maintenance workload caused by the requirement to install one pressure sensor at the inlet and one at the outlet of existing liquid-cooled test loads.

[0006] To achieve the above objectives, the following technical solution is adopted.

[0007] A liquid-cooled test load pressure detection device based on differential pressure calculation includes an inlet water pressure sensor, a differential pressure transmitter, and a resistance module unit. The resistance module unit has an inlet end and an outlet end. The heat dissipation medium flows into the resistance module unit from the inlet end and generates a pressure drop before flowing out from the outlet end. The inlet water pressure sensor is installed at the inlet end and connected to it, and is used to detect the inlet water pressure at the inlet end. The differential pressure transmitter has a high-pressure side interface and a low-pressure side interface. The high-pressure side interface is connected to the inlet end, and the low-pressure side interface is connected to the outlet end. The differential pressure transmitter is connected between the inlet end and the outlet end, and is used to detect the pressure difference between the inlet end and the outlet end.

[0008] Optionally, the resistor module unit includes a resistor module and a liquid cooling channel. The liquid cooling channel has an inlet port and an outlet port. The resistor module is installed inside the liquid cooling channel and makes thermal contact with the liquid cooling channel. The inlet end is located on the side of the inlet port of the liquid cooling channel, and the outlet end is located on the side of the outlet port of the liquid cooling channel.

[0009] Optionally, the high-pressure side interface is connected to the inlet end via a pressure-sensing pipeline, and the low-pressure side interface is connected to the outlet end via a pressure-sensing pipeline. The differential pressure transmitter outputs a differential pressure signal based on the pressure difference received by the high-pressure side interface and the pressure received by the low-pressure side interface. The differential pressure is the difference between the pressure at the inlet end and the pressure at the outlet end.

[0010] Optionally, the inlet pressure sensor is installed on the inlet pipe at the inlet end, and the inlet pipe is connected to the inlet end of the resistor module unit. The inlet pressure sensor is located on the inlet side of the resistor module unit. The inlet pressure sensor outputs an inlet pressure signal, which is used to calculate the outlet pressure together with the differential pressure signal.

[0011] Optionally, the device also includes a pressure calculation unit, which is installed on the liquid inlet side of the resistor module unit. The pressure calculation unit is connected to the inlet water pressure sensor and the differential pressure transmitter via signal cables. The pressure calculation unit receives the inlet water pressure signal and the differential pressure signal, and outputs the outlet water pressure signal, the inlet liquid pressure signal, the outlet liquid pressure signal, and the differential pressure signal. The output end of the pressure calculation unit is connected to the display unit, which is used to display the pressure value corresponding to each pressure signal.

[0012] Optionally, the high-pressure side interface of the inlet pressure sensor and the differential pressure transmitter are both connected to the same pressure tapping position at the inlet end. A pressure tapping port is provided at the pressure tapping position, and both the inlet pressure sensor and the high-pressure side interface are connected to the pressure tapping port. The differential pressure transmitter uses the pressure at the pressure tapping position as the high-pressure side reference pressure to measure the differential pressure.

[0013] Optionally, the liquid outlet of the resistor module unit is connected to a liquid outlet pipeline. No pressure detection element is installed at the connection between the liquid outlet pipeline and the liquid outlet, and no pressure measuring structure or pressure measuring cable is installed on the liquid outlet pipeline.

[0014] A liquid cooling test load pressure detection method based on differential pressure calculation is disclosed. The heat dissipation medium flows into the resistor module unit from the inlet end, generates a pressure drop in the resistor module unit, and then flows out from the outlet end of the resistor module unit. The method includes the following steps: acquiring the inlet pressure at the inlet end using an inlet pressure sensor installed at the inlet end to obtain an inlet pressure signal; acquiring the pressure difference between the inlet end and the outlet end using a differential pressure transmitter to obtain a differential pressure signal; calculating the outlet pressure based on the inlet pressure signal and the differential pressure signal, wherein the outlet pressure is equal to the inlet pressure minus the differential pressure; and outputting the inlet pressure, outlet pressure, and differential pressure.

[0015] Optionally, the high-pressure side interface of the differential pressure transmitter collects the pressure at the inlet end, and the low-pressure side interface of the differential pressure transmitter collects the pressure at the outlet end. The differential pressure signal is the difference between the pressure at the inlet end and the pressure at the outlet end. The inlet pressure sensor and the high-pressure side interface are connected to the same pressure tapping position at the inlet end.

[0016] Optionally, when calculating the outlet pressure based on the inlet pressure signal and the differential pressure signal, the outlet pressure is calculated according to the formula: The calculation yielded, where For the outlet water pressure, For inlet water pressure, The pressure difference is used to output the inlet pressure, outlet pressure, and pressure difference. When outputting the inlet pressure, outlet pressure, and pressure difference, the inlet pressure is output as the inlet pressure, the outlet pressure is output as the outlet pressure, and the pressure difference is output as the pressure difference between the inlet pressure and the outlet pressure.

[0017] Compared with the prior art, the present invention has the following beneficial effects: This invention provides a liquid-cooled test load pressure detection device based on differential pressure calculation. It detects the inlet water pressure at the inlet end using an inlet water pressure sensor and the pressure difference between the inlet and outlet ends using a differential pressure transmitter. The outlet water pressure is obtained from the inlet water pressure and the pressure difference. Simultaneously, the inlet water pressure, outlet water pressure, and pressure difference are obtained. This eliminates the need for an outlet pressure sensor at the outlet end, reducing the number of pressure sensors and lowering hardware costs. Reducing the number of pressure sensors also reduces potential failure points and improves the stability of pressure detection. It avoids inconsistency errors between two pressure sensors, improving test accuracy. Furthermore, it simplifies the installation and maintenance of the pressure detection device, reducing subsequent maintenance workload.

[0018] Furthermore, the resistance module unit includes a resistance module and a liquid-cooled flow channel. The resistance module is installed inside the liquid-cooled flow channel and makes thermal contact with it. The differential pressure transmitter is connected between the inlet and outlet sides of the liquid-cooled flow channel, utilizing the flow resistance of the resistance module unit itself to generate a pressure drop, eliminating the need for an additional throttling structure. The high-pressure side interface and the low-pressure side interface are connected to the inlet and outlet ends respectively via pressure-tapping pipes, resulting in a simple pressure-tapping structure. The inlet water pressure sensor and the high-pressure side interface of the differential pressure transmitter are connected to the same pressure tapping position at the inlet end, and the inlet water pressure and the high-pressure side differential pressure are taken from the same pressure measuring surface. It eliminates consistency errors between different measuring surfaces; no pressure detection element is installed at the connection between the outlet pipeline and the outlet end, and there is no pressure measuring structure or pressure measuring cable at the outlet end, allowing for free arrangement of the outlet pipeline; the pressure calculation unit receives the inlet water pressure signal and the differential pressure signal, and outputs the outlet water pressure signal, inlet liquid pressure signal, outlet liquid pressure signal, and differential pressure signal, while the display unit displays the corresponding pressure value, making the pressure detection results intuitive; in the method steps, the outlet water pressure is calculated by using the inlet water pressure and the differential pressure, and the outlet water pressure is equal to the inlet water pressure minus the differential pressure, realizing pressure detection without an outlet pressure sensor, resulting in high testing accuracy and low cost. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of a liquid-cooled test load pressure detection device based on differential pressure calculation according to the present invention.

[0020] Figure 2 This is a flowchart illustrating the steps of a liquid cooling test load pressure detection method based on differential pressure calculation according to the present invention. Detailed Implementation

[0021] The present invention will now be described in detail with reference to the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other.

[0022] The following detailed description is exemplary and intended to provide a further detailed explanation of the invention. Unless otherwise specified, all technical terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0023] Example 1

[0024] like Figure 1As shown in Embodiment 1, a liquid-cooled test load pressure detection device based on differential pressure calculation is provided, including an inlet water pressure sensor, a differential pressure transmitter, and a resistance module unit. It also includes an inlet pipe, an outlet pipe, a pressure calculation unit, and a display unit. The inlet pipe is connected to the inlet end of the resistance module unit. The inlet water pressure sensor is installed on the inlet pipe and connected to the inlet end. The outlet end of the resistance module unit is connected to the outlet pipe. The differential pressure transmitter has a high-pressure side interface and a low-pressure side interface. The high-pressure side interface is connected to the inlet end via a pressure-sensing pipe, and the low-pressure side interface is connected to the outlet end via a pressure-sensing pipe. The pressure calculation unit is connected to the inlet water pressure sensor and the differential pressure transmitter via signal cables, and the output end of the pressure calculation unit is connected to the display unit. When the liquid-cooled test load is working, the heat dissipation medium flows into the resistor module unit through the inlet pipe and flows out through the outlet pipe. The device detects the inlet water pressure through the inlet water pressure sensor and the pressure difference between the inlet and outlet ends through the differential pressure transmitter. The pressure calculation unit obtains the outlet water pressure based on the inlet water pressure and the pressure difference. It is possible to obtain the inlet water pressure, outlet water pressure and pressure difference simultaneously without setting an outlet pressure sensor at the outlet end.

[0025] The resistance module unit includes a resistance module and a liquid-cooled flow channel. The liquid-cooled flow channel has an inlet and an outlet, with the inlet located at one end and the outlet at the other. The resistance module is installed inside the liquid-cooled flow channel and is in thermal contact with it. The liquid-cooled test load simulates the thermal load of the liquid-cooling system, and the resistance module acts as a heat-generating element to simulate the heat generated by the device under test. The heat dissipation medium flows into the liquid-cooled flow channel through the inlet, absorbs the heat generated by the resistance module, and flows out through the outlet. The inlet is located on one side of the liquid-cooled flow channel, and the outlet is located on the other side. When the heat dissipation medium flows through the resistance module unit, the resistance module obstructs the flow of the heat dissipation medium, creating a pressure drop between the inlet and outlet ends, with the pressure at the inlet being higher than that at the outlet. The liquid cooling channel can adopt a metal tube or metal cavity structure. The resistor module is fixed inside the liquid cooling channel and fits against the inner wall of the liquid cooling channel to ensure that the heat generated by the resistor module can be fully transferred to the heat dissipation medium flowing through it.

[0026] The inlet pressure sensor is installed on the inlet pipe, located on the inlet side of the resistance module unit. The heat dissipation medium flows through the inlet pipe past the sensor and into the resistance module unit. The inlet pressure sensor is mounted on the pipe wall and is fluidly connected to the inlet end. It detects the inlet pressure of the heat dissipation medium at the inlet end and outputs an inlet pressure signal. The inlet pressure sensor and the high-pressure side interface of the differential pressure transmitter share the same pressure tapping location at the inlet end of the resistance module unit. A pressure tapping port is located at this location on the pipe wall at the inlet end. The inlet pressure sensor and the pressure tapping port, as well as the high-pressure side interface and the pressure tapping port, are connected via pressure tapping pipes. The inlet pressure detected by the inlet pressure sensor and the pressure received by the high-pressure side interface are both taken from the same pressure tapping location, ensuring that the inlet pressure and the high-pressure side reference pressure of the differential pressure transmitter have the same pressure measurement benchmark, avoiding measurement deviations caused by different pressure tapping locations.

[0027] The differential pressure transmitter has a high-pressure side interface and a low-pressure side interface. The high-pressure side interface is connected to the inlet end via a pressure-sensing pipeline, and the low-pressure side interface is connected to the outlet end via a pressure-sensing pipeline. One end of the pressure-sensing pipeline is connected to either the high-pressure side interface or the low-pressure side interface, and the other end is connected to either the inlet end or the outlet end. The pressure-sensing pipeline is used to transmit the pressure at the inlet end to the high-pressure side interface and the pressure at the outlet end to the low-pressure side interface. The differential pressure transmitter outputs a differential pressure signal based on the pressure difference received at the high-pressure side interface and the pressure received at the low-pressure side interface. The differential pressure signal corresponds to the pressure difference between the inlet end pressure and the outlet end pressure. When the heat dissipation medium flows through the resistor module unit, a pressure drop is generated. The pressure at the inlet end is higher than the pressure at the outlet end, and the differential pressure transmitter detects the pressure difference between the inlet end pressure and the outlet end pressure. Differential pressure transmitters are existing differential pressure measurement devices. Those skilled in the art can directly use commercially available differential pressure transmitters. After connecting the high-pressure side interface and the low-pressure side interface of the differential pressure transmitter to the pressure tapping positions on both sides, the differential pressure signal can be output.

[0028] The pressure calculation unit is installed on the inlet side of the resistance module unit. It is connected to the inlet water pressure sensor and the differential pressure transmitter via signal cables. The pressure calculation unit receives the inlet water pressure signal from the inlet water pressure sensor and the differential pressure signal from the differential pressure transmitter, and outputs the outlet water pressure signal, inlet liquid pressure signal, outlet liquid pressure signal, and differential pressure signal. The outlet water pressure is calculated based on the inlet water pressure and the differential pressure signal; the outlet water pressure equals the inlet water pressure minus the differential pressure. The inlet liquid pressure is the inlet water pressure, and the outlet liquid pressure is the outlet water pressure. The differential pressure is the pressure difference between the inlet and outlet liquid pressures. The output of the pressure calculation unit is connected to the display unit, which displays the outlet water pressure, inlet liquid pressure, and outlet liquid pressure, as well as the differential pressure. The pressure calculation unit is directly implemented using an existing microprocessor or programmable controller, representing a direct adoption of existing components. The signal receiving, calculation, and output functions of the pressure calculation unit are executed by the existing processor according to the program. Those skilled in the art can directly configure and implement it based on the aforementioned signal processing relationships, without requiring any modification to the processor structure. The display unit can use a liquid-cooled test load configuration display panel or indicator lights to present various pressure values ​​to the operator.

[0029] The outlet of the resistance module unit is connected to an outlet pipe, through which the heat dissipation medium flows out. No pressure sensing elements are installed at the connection between the outlet pipe and the outlet, nor on the outlet pipe itself. The pressure at the outlet is calculated from the inlet pressure and differential pressure, eliminating the need for an outlet pressure sensor or pressure tapping structure on the outlet pipe side. There are no pressure measuring structures or cables on the outlet pipe side, reducing the number of pressure sensors and cable routing. The differential pressure transmitter is installed near the resistance module unit, with a mounting bracket connecting it to the resistance module unit. The differential pressure transmitter is fixedly mounted on the mounting bracket, minimizing the length of the pressure tapping pipe.

[0030] During operation, the heat dissipation medium flows into the liquid cooling channel through the inlet pipe and passes through the resistor module. The inlet water pressure sensor detects the inlet water pressure at the inlet end and outputs an inlet water pressure signal. The differential pressure transmitter acquires the inlet and outlet pressures through the high-pressure and low-pressure side interfaces respectively and outputs a differential pressure signal. The pressure calculation unit receives the inlet water pressure signal and the differential pressure signal, and outputs the outlet water pressure signal, inlet water pressure signal, outlet water pressure signal, and differential pressure signal. The display unit displays the inlet water pressure corresponding to the inlet water pressure, the outlet water pressure corresponding to the outlet water pressure, and the differential pressure, completing the pressure detection of the liquid cooling test load. The entire pressure detection process requires only two pressure sensing elements: the inlet water pressure sensor and the differential pressure transmitter. No pressure sensing element is required at the outlet end. The device has a simple structure, a small number of pressure sensing elements, and few potential points of failure in pressure detection.

[0031] When the device is connected to a liquid cooling system, one end of the inlet pipe is connected to the liquid supply pipe of the liquid cooling system, and one end of the outlet pipe is connected to the return pipe of the liquid cooling system. The resistor module unit is connected in series between the liquid supply circuit and the return circuit of the liquid cooling system. The heat dissipation medium flows from the supply pipe through the inlet pipe into the resistor module unit, absorbs the heat generated by the resistor module through the liquid cooling channel, and then flows from the outlet end through the outlet pipe into the return pipe. The inlet pressure sensor, differential pressure transmitter, pressure calculation unit, and display unit are arranged close to the liquid-cooled test load body along with the resistor module unit. The inlet pressure sensor and differential pressure transmitter are connected to the pressure calculation unit through signal cables, and the pressure calculation unit and the display unit are connected through signal cables. All pressure measuring elements and signal processing elements are concentrated in the liquid-cooled test load body, eliminating the need to arrange pressure measuring elements and pressure measuring cables on the return pipe side, which facilitates the installation and wiring of the liquid-cooled test load in the liquid cooling circuit.

[0032] The pressure tap is located on the pipe wall at the inlet end, extending radially from the inlet. A pressure tapping line connects to the pressure tap, which, via a tee connector, connects to the pressure tapping lines of the inlet pressure sensor and the high-pressure side interface, allowing them to share the same pressure tap and location. The pressure tapping line of the low-pressure side interface connects to the outlet end, where a pressure tap can also be provided for pressure tapping from the low-pressure side interface. This outlet pressure tap is solely for low-pressure side pressure tapping by the differential pressure transmitter; no independent pressure sensing element is installed at the outlet end. Both the pressure tapping and pressure tapping lines can be made of metal or flexible tubing, and the connections are sealed to ensure leak-free pressure transmission.

[0033] Furthermore, in a preferred embodiment, both the high-pressure side and low-pressure side pressure tapping lines are equipped with vent valves. The vent valves are installed at the highest point of the pressure tapping lines to release accumulated gas. When air bubbles accumulate in the pressure tapping lines, they occupy the internal space, affecting the pressure transmission to the differential pressure transmitter and causing deviations in the differential pressure measurement. Releasing the accumulated gas through the vent valves ensures the continuity of pressure transmission within the pressure tapping lines and improves the accuracy of the differential pressure measurement. Existing manual or automatic vent valves can be used, and those skilled in the art can directly select the appropriate valve based on the layout of the pressure tapping lines.

[0034] Furthermore, in a preferred embodiment, the device further includes a temperature sensor installed at the liquid inlet, in thermally conductive contact with the liquid inlet, for detecting the temperature of the heat dissipation medium at the liquid inlet. The temperature sensor is signal-connected to a pressure calculation unit, which receives the temperature signal output by the temperature sensor, performs temperature compensation on the inlet water pressure signal and differential pressure signal based on the temperature signal, and then outputs the outlet water pressure signal, inlet liquid pressure signal, outlet liquid pressure signal, and differential pressure signal. The heat dissipation medium is heated as it flows through the resistor module; the increased medium temperature causes changes in the medium's physical properties, thus affecting the pressure measurement results. Temperature compensation corrects the influence of temperature on pressure measurement, improving the accuracy of pressure detection. The temperature sensor is implemented directly using existing temperature sensing elements, which can be directly selected by those skilled in the art.

[0035] Furthermore, in a preferred embodiment, a damping structure is provided between the inlet pressure sensor and the pressure tapping position. This damping structure is a damping orifice located within the pressure tapping port or pressure-feeding pipeline. Pressure fluctuations occur during the flow of the heat dissipation medium. The damping orifice buffers these pressure fluctuations, ensuring stable pressure transmitted to the inlet pressure sensor and suppressing the impact of pressure fluctuations on inlet pressure and differential pressure measurements, thereby improving the stability of pressure detection. The damping orifice is a constricted aperture structure located within the pressure tapping or pressure-feeding pipeline. Those skilled in the art can adjust the orifice diameter according to the pressure fluctuation amplitude.

[0036] Furthermore, in a preferred embodiment, the pressure calculation unit determines the pressure detection status based on the relationship between the inlet pressure signal, the differential pressure signal, and the outlet pressure signal. When the differential pressure signal exceeds a preset range, an alarm signal is output. Since the outlet pressure equals the inlet pressure minus the differential pressure, a definite numerical relationship exists between the inlet pressure, outlet pressure, and differential pressure. When the differential pressure signal is abnormal, the consistency of the inlet pressure signal, differential pressure signal, and outlet pressure signal is checked based on this numerical relationship. If the consistency check fails or the differential pressure exceeds the preset range, an alarm signal is output to indicate an abnormal pressure detection, facilitating timely troubleshooting of pressure sensing element malfunctions. The preset range is set by those skilled in the art based on the working pressure range of the liquid-cooled test load.

[0037] The above-described preferred embodiments can be used individually or in any combination. In situations where both bubble accumulation and pressure fluctuation exist, an exhaust valve and a damping structure can be simultaneously installed; in situations where the medium temperature changes significantly, a temperature sensor can be simultaneously installed for temperature compensation; and in scenarios where the reliability of the pressure measuring element is critical, an abnormal alarm function can be simultaneously enabled. The feature combinations of each preferred embodiment are based on the basic structure of liquid-cooled test load pressure detection. The combination does not change the basic connection relationship of the device, only adding corresponding auxiliary structures and functions. Those skilled in the art can select the appropriate method based on actual operating conditions. The device continuously performs pressure detection during the operation of the liquid-cooled test load. The pressure detection results are used to evaluate the heat dissipation performance of the liquid-cooled test load and the operating status of the liquid-cooling system, providing data for fault diagnosis of the liquid-cooling system.

[0038] Example 2

[0039] like Figure 2 As shown, Example 2 provides a liquid cooling test load pressure detection method based on differential pressure calculation, applied to the liquid cooling test load pressure detection device based on differential pressure calculation provided in Example 1. The heat dissipation medium flows into the resistor module unit from the inlet end, and then flows out from the outlet end of the resistor module unit. The method includes the following steps: acquiring the inlet pressure at the inlet end using an inlet pressure sensor installed at the inlet end to obtain an inlet pressure signal; acquiring the pressure difference between the inlet end and the outlet end using a differential pressure transmitter to obtain a differential pressure signal; calculating the outlet pressure based on the inlet pressure signal and the differential pressure signal, where the outlet pressure is equal to the inlet pressure minus the differential pressure to obtain the outlet pressure signal; and outputting the inlet pressure, outlet pressure, and differential pressure, where the inlet pressure is the inlet pressure and the outlet pressure is the outlet pressure.

[0040] When the inlet pressure at the inlet end is collected by an inlet pressure sensor installed at the inlet end, the heat dissipation medium flows into the resistor module unit through the inlet pipe. The inlet pressure sensor is installed on the pipe wall of the inlet pipe and is fluidly connected to the inlet end. The inlet pressure sensor detects the inlet pressure of the heat dissipation medium at the inlet end and outputs an inlet pressure signal. The inlet pressure corresponding to the inlet pressure signal is the pressure of the heat dissipation medium at the inlet end of the resistor module unit.

[0041] The inlet pressure signal is transmitted to the pressure calculation unit via a signal cable, and the differential pressure signal is also transmitted to the pressure calculation unit via a signal cable. The pressure calculation unit receives the inlet pressure signal and the differential pressure signal synchronously, and performs calculations based on the inlet pressure signal and the differential pressure signal.

[0042] When acquiring the pressure difference between the inlet and outlet ends using a differential pressure transmitter, the high-pressure side interface of the transmitter is connected to the inlet end via a pressure-tapping pipeline, and the low-pressure side interface is connected to the outlet end via a pressure-tapping pipeline. The high-pressure side interface receives the pressure at the inlet end, and the low-pressure side interface receives the pressure at the outlet end. The differential pressure transmitter outputs a differential pressure signal, which corresponds to the difference between the inlet and outlet pressures. Both the high-pressure side interface of the differential pressure transmitter and the inlet pressure sensor are connected to the same pressure tapping location at the inlet end. The pressure acquired by the high-pressure side interface and the inlet pressure sensor are taken from the same pressure tapping location. The differential pressure transmitter uses the pressure at the pressure tapping location as the high-pressure side reference pressure to acquire the differential pressure signal, ensuring that the high-pressure side reference pressure and the inlet pressure have the same measurement benchmark. The low-pressure side interface of the differential pressure transmitter is connected to the outlet end via a pressure-tapping pipeline, and the low-pressure side interface acquires the outlet pressure.

[0043] When calculating the outlet pressure based on the inlet pressure signal and the differential pressure signal, the outlet pressure is calculated according to the formula: The calculation yielded, where For the outlet water pressure, For inlet water pressure, The pressure difference is used to obtain the outlet water pressure signal. When the heat dissipation medium flows through the resistor module unit, a pressure drop occurs. The pressure at the inlet is higher than the pressure at the outlet; the pressure difference is the difference between the inlet and outlet pressures. The outlet water pressure is obtained by subtracting the pressure difference from the inlet water pressure, i.e., the outlet pressure. The calculation process is performed by the pressure calculation unit, which receives the inlet water pressure signal and the pressure difference signal, and calculates the outlet water pressure signal according to the above formula.

[0044] When outputting inlet pressure, outlet pressure, and differential pressure, the inlet water pressure is output as the inlet pressure, the outlet water pressure as the outlet pressure, and the differential pressure as the pressure difference between the inlet and outlet pressures. The output results are displayed on the display unit, allowing operators to view the inlet pressure, outlet pressure, and differential pressure to complete the pressure detection of the liquid-cooled test load. This method obtains the outlet pressure solely from the inlet water pressure and differential pressure, eliminating the need for pressure sensing elements at the outlet end. This reduces the number of pressure sensing elements, lowers hardware costs, eliminates dual-sensor consistency errors, and improves pressure detection accuracy.

[0045] Furthermore, in a preferred embodiment, before acquiring the pressure difference between the inlet and outlet ends using a differential pressure transmitter, the gas accumulated in the high-pressure side and low-pressure side pressure-sensing pipelines is first discharged through an exhaust valve located at the highest position of the pressure-sensing pipeline to ensure the continuity of pressure transmission within the pressure-sensing pipeline. Then, the differential pressure signal is acquired to improve the accuracy of the differential pressure measurement.

[0046] Furthermore, in a preferred embodiment, before calculating the outlet pressure based on the inlet pressure signal and the differential pressure signal, a temperature sensor installed at the inlet end detects the temperature of the heat dissipation medium at the inlet end to obtain a temperature signal. The inlet pressure signal and the differential pressure signal are then temperature-compensated based on the temperature signal. The outlet pressure is then calculated based on the temperature-compensated inlet pressure signal and differential pressure signal. The pressure detection status is determined based on the relationship between the inlet pressure signal, the differential pressure signal, and the outlet pressure signal. When the differential pressure signal exceeds a preset range, an alarm signal is output to indicate an abnormal pressure detection.

[0047] A liquid cooling test load pressure detection device and method based on differential pressure calculation can be applied to the liquid cooling test load pressure detection scenario in liquid cooling data centers. It can be used for pressure detection of server liquid cooling systems, data center liquid cooling heat dissipation systems, and liquid cooling test equipment. The outlet pressure is obtained by using the inlet water pressure and differential pressure, eliminating the need to set an outlet pressure sensor at the liquid outlet end, reducing the number of pressure sensors, lowering hardware costs, eliminating the consistency error of dual sensors, improving test accuracy, and reducing the pressure measurement structure and cables at the liquid outlet end, simplifying the device structure and facilitating installation and maintenance.

[0048] As is known from common technical knowledge, the present invention can be implemented through other embodiments without departing from the spirit or essential characteristics of the invention. Therefore, the disclosed embodiments described above are merely illustrative in all respects and are not exhaustive. All modifications within the scope of the present invention or its equivalents are included in the present invention.

Claims

1. A liquid-cooled test load pressure detection device based on differential pressure calculation, characterized in that, Includes an inlet pressure sensor, a differential pressure transmitter, and a resistance module unit; The resistor module unit has a liquid inlet and a liquid outlet. The heat dissipation medium flows into the resistor module unit from the liquid inlet and then flows out from the liquid outlet. The inlet pressure sensor is installed at the inlet end and connected to the inlet end, and is used to detect the inlet pressure at the inlet end; The differential pressure transmitter has a high-pressure side interface and a low-pressure side interface. The high-pressure side interface is connected to the liquid inlet, and the low-pressure side interface is connected to the liquid outlet, and is used to detect the pressure difference between the liquid inlet and the liquid outlet.

2. The liquid-cooled test load pressure detection device based on differential pressure calculation according to claim 1, characterized in that, The resistor module unit includes a resistor module and a liquid cooling channel. The liquid cooling channel has a liquid inlet and a liquid outlet. The liquid inlet is located at one end of the liquid cooling channel, and the liquid outlet is located at the other end of the liquid cooling channel. The resistor module is installed inside the liquid cooling channel and is in thermal contact with the liquid cooling channel. The liquid inlet is located on one side of the liquid inlet interface of the liquid cooling channel, and the liquid outlet is located on one side of the liquid outlet interface of the liquid cooling channel. The heat dissipation medium flows into the liquid cooling channel from the liquid inlet interface, passes through the resistor module, and then flows out from the liquid outlet interface.

3. The liquid-cooled test load pressure detection device based on differential pressure calculation according to claim 1, characterized in that, The high-pressure side interface is connected to the liquid inlet via a pressure-sensing pipeline, and the low-pressure side interface is connected to the liquid outlet via a pressure-sensing pipeline. One end of the pressure-sensing pipeline is connected to the high-pressure side interface or the low-pressure side interface, and the other end of the pressure-sensing pipeline is connected to the liquid inlet or the liquid outlet. The pressure-sensing pipeline is used to transmit the pressure at the inlet end to the high-pressure side interface and the pressure at the outlet end to the low-pressure side interface. The differential pressure transmitter outputs a differential pressure signal based on the difference between the pressure received at the high-pressure side interface and the pressure received at the low-pressure side interface.

4. The liquid-cooled test load pressure detection device based on differential pressure calculation according to claim 1, characterized in that, The water inlet pressure sensor is installed on the liquid inlet pipe at the liquid inlet end, one end of the liquid inlet pipe is connected to the liquid inlet end of the resistor module unit, and the water inlet pressure sensor is located on the liquid inlet side of the resistor module unit. The heat dissipation medium flows through the liquid inlet pipe past the location of the water inlet pressure sensor and then into the resistor module unit; The inlet water pressure sensor is installed on the wall of the inlet pipe to detect the inlet water pressure of the heat dissipation medium in the inlet pipe and output the inlet water pressure signal.

5. The liquid-cooled test load pressure detection device based on differential pressure calculation according to claim 1, characterized in that, It also includes a pressure calculation unit, which is installed on the liquid inlet side of the resistor module unit. The pressure calculation unit is connected to the inlet water pressure sensor and the differential pressure transmitter via signal cables. The pressure calculation unit receives the inlet pressure signal output by the inlet pressure sensor and the differential pressure signal output by the differential pressure transmitter, and outputs the outlet pressure signal, the inlet pressure signal, the outlet pressure signal, and the differential pressure signal. The output of the pressure calculation unit is connected to the display unit, which is used to display the pressure values ​​corresponding to the outlet pressure signal, the inlet pressure signal, the outlet pressure signal, and the differential pressure signal.

6. The liquid-cooled test load pressure detection device based on differential pressure calculation according to claim 1, characterized in that, The inlet pressure sensor and the high-pressure side interface of the differential pressure transmitter are both connected to the same pressure tapping position through the pressure tapping port at the liquid inlet end. The pressure tapping position is located at the liquid inlet end of the resistor module unit. The pressure tapping port is set on the pipe wall at the liquid inlet end. The inlet pressure sensor and the pressure tapping port, and the high-pressure side interface and the pressure tapping port are respectively connected through pressure tapping pipelines. The inlet water pressure detected by the inlet water pressure sensor and the pressure received by the high-pressure side interface are both taken from the pressure tapping position. The differential pressure transmitter uses the pressure at the pressure tapping position as the high-pressure side reference pressure to detect the differential pressure.

7. The liquid-cooled test load pressure detection device based on differential pressure calculation according to claim 1, characterized in that, The liquid outlet end of the resistor module unit is connected to a liquid outlet pipe, and the heat dissipation medium flows out from the liquid outlet end through the liquid outlet pipe. No pressure detection element is installed at the connection between the liquid outlet pipeline and the liquid outlet end, or on the liquid outlet pipeline itself. The differential pressure transmitter is installed near the resistance module unit. A mounting bracket is provided between the differential pressure transmitter and the resistance module unit. The mounting bracket is fixedly connected to the resistance module unit, and the differential pressure transmitter is fixedly installed on the mounting bracket.

8. A method for detecting liquid-cooled test load pressure based on differential pressure calculation, comprising the liquid-cooled test load pressure detection device based on differential pressure calculation as described in any one of claims 1-7, characterized in that, Includes the following steps: The inlet pressure signal is obtained by acquiring the inlet pressure at the inlet end of the resistor module unit through an inlet pressure sensor installed at the inlet end of the inlet. The pressure difference between the inlet and outlet ends is collected by a differential pressure transmitter to obtain a differential pressure signal; The outlet pressure is calculated based on the inlet pressure signal and the pressure difference signal. The outlet pressure is equal to the inlet pressure minus the pressure difference, and the outlet pressure signal is obtained. The system outputs inlet pressure, outlet pressure, and pressure difference, wherein the inlet pressure is the inlet water pressure, and the outlet pressure is the outlet water pressure.

9. The liquid cooling test load pressure detection method based on differential pressure calculation according to claim 8, characterized in that, When the differential pressure transmitter collects the pressure difference between the inlet end and the outlet end, the high-pressure side interface of the differential pressure transmitter and the inlet pressure sensor are both connected to the same pressure tapping position at the inlet end. The pressure collected by the high-pressure side interface and the inlet pressure collected by the inlet pressure sensor are taken from the same pressure tapping position. The low-pressure side interface of the differential pressure transmitter is connected to the liquid outlet end through a pressure-sensing pipeline, and the differential pressure signal is the difference between the pressure collected by the high-pressure side interface and the pressure collected by the low-pressure side interface.

10. The liquid cooling test load pressure detection method based on differential pressure calculation according to claim 8, characterized in that, When calculating the outlet pressure based on the inlet pressure signal and the differential pressure signal, the outlet pressure is calculated according to the formula: The calculation yielded, where For the outlet water pressure, For inlet water pressure, It is the pressure difference; When outputting the inlet pressure, outlet pressure, and pressure difference, the inlet pressure is output as the inlet pressure, the outlet pressure is output as the outlet pressure, and the pressure difference is output as the pressure difference between the inlet pressure and the outlet pressure.

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