Online liquid changing device

The online coolant replacement device enables automatic coolant replacement, solving the problems of cumbersome coolant replacement process and safety hazards in liquid cooling systems. It improves the efficiency and safety of coolant replacement and is suitable for data centers and communication base stations.

CN121383522APending Publication Date: 2026-01-23THERMAL CONTROL TECHNOLOGY (SHENZHEN) CO LTD
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Patent Information

Application Number
CN202511945287.X
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-12-19
Publication Date
2026-01-23

AI Technical Summary

Technical Problem

Existing server or switch cabinet liquid cooling systems require shutdown, draining of coolant, and multiple cleaning processes when replacing coolant, which is cumbersome, time-consuming, and poses safety hazards.

Method used

Design an online coolant replacement device, including a coolant replenishment module, a coolant drainage module, and a host computer, to realize automatic coolant replacement. The device determines the completion of coolant replacement by real-time detection of conductivity and pH value, and adopts an intelligent control strategy to ensure stable system pressure. It is suitable for high business continuity scenarios.

Benefits of technology

It enables automatic coolant replacement during system operation, reducing manual intervention, lowering safety risks, improving coolant replacement efficiency, and ensuring that the coolant quality meets requirements. It is suitable for scenarios such as data centers and communication base stations.

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Abstract

The invention discloses an online liquid changing device, and belongs to the technical field of liquid cooling system maintenance equipment, and the online liquid changing device comprises a liquid supplementing module which is connected with a liquid cooling system and is used for injecting cooling liquid into the liquid cooling system; the liquid discharging module is connected with the liquid cooling system and is used for discharging the cooling liquid from the liquid cooling system; the upper computer is in communication connection with the liquid supplementing module and the liquid discharging module and used for controlling liquid supplementing and liquid discharging to be carried out synchronously and judging whether liquid changing is completed or not according to the conductivity and the pH value detected in real time. The liquid supplementing module, the liquid discharging module and the intelligent upper computer are integrated, manual operation is not needed in the whole liquid replacing process, the tedious steps of multiple times of liquid discharging, cleaning, liquid supplementing and the like in a traditional liquid replacing mode are avoided, and manpower and time cost is remarkably saved.
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Description

TECHNICAL FIELD

[0001] The present application belongs to the technical field of liquid cooling system maintenance equipment, and in particular relates to an online liquid replacement device. BACKGROUND

[0002] Currently, when the liquid cooling system of a server or switch cabinet needs to be replaced, it usually needs to be stopped, the cooling liquid is discharged, the system is cleaned multiple times, and then new cooling liquid is injected, which is a complicated process, time-consuming, high in labor cost, and has safety hazards caused by cooling liquid evaporation or leakage.

[0003] Therefore, there is a lack of a device in the prior art that can automatically replace liquid during system operation. SUMMARY

[0004] To solve the above problems, the present application provides an online liquid replacement device, which can automatically replace the cooling liquid under normal operation of the liquid cooling system, improve the liquid replacement efficiency, and reduce manual intervention and safety risks.

[0005] An online liquid replacement device comprises: A liquid supplementing module connected with the liquid cooling system for injecting cooling liquid into the liquid cooling system; A liquid discharging module connected with the liquid cooling system for discharging cooling liquid from the liquid cooling system; An upper computer in communication connection with the liquid supplementing module and the liquid discharging module for controlling the synchronization of liquid supplementing and discharging, and judging whether the liquid replacement is completed according to the real-time detected electrical conductivity and pH value.

[0006] Further, the liquid supplementing module comprises a liquid storage tank, a liquid supplementing pump, a flow meter, a pressure transmitter, an electrical conductivity meter and a pH meter; The liquid storage tank is in communication with the liquid cooling system through a pipeline; wherein the liquid supplementing pump, the flow meter, the pressure transmitter, the electrical conductivity meter and the pH meter are arranged on the pipeline and connected with the upper computer.

[0007] Further, the liquid supplementing pump is a variable flow pump with a head greater than the static pressure requirement of the liquid cooling system.

[0008] Further, the liquid discharging module comprises a liquid discharging pipeline assembly, a control valve, a flow transmitter, a pressure transmitter, an electrical conductivity transmitter and a pH sensor; The liquid discharging pipeline assembly is in communication with the liquid cooling system; wherein the control valve, the flow transmitter, the pressure transmitter, the electrical conductivity transmitter and the pH sensor are arranged on the liquid discharging pipeline assembly respectively and connected with the upper computer.

[0009] Further, the control valve is an electric valve or a manual valve with flow regulation function.

[0010] Further, the upper computer includes a control module and a controller. The control module has two working modes, i.e., a normal mode and a cleaning mode, and has a man-machine interactive interface based on GUI for selection of working mode and adjustment of control parameters. The control module is connected with the controller through a serial communication module, and the controller is connected with the flow meter, the pressure transmitter, the conductivity meter, the pH meter, the flow transmitter, the pressure transmitter, the conductivity transmitter, the pH sensor, the liquid supplement pump and the control valve.

[0011] Further, the controller includes: A data acquisition unit connected with the flow meter, the pressure transmitter, the conductivity meter, the pH meter, the flow transmitter, the pressure transmitter, the conductivity transmitter and the pH sensor for acquisition of parameter information. An algorithm processing unit connected with the data acquisition unit for processing and comparison of the acquired parameter information. A control output unit connected with the algorithm processing unit, the liquid supplement pump and the control valve. A cleaning unit connected with the data acquisition unit, the liquid supplement pump and the control valve, which is used for injecting pure water into the liquid cooling system for circulation cleaning in the cleaning mode, and discharging the water after the water quality is qualified through a liquid discharge module; wherein, the conductivity of the discharged water is monitored, and when the conductivity is less than or equal to a cleaning qualified setting value and lasts for a preset time, it is determined that the cleaning is completed. A data storage unit connected with the control output unit and the cleaning unit for storage of detection data and processing results.

[0012] Further, the algorithm processing unit adopts a sliding average filtering or Kalman filtering algorithm to eliminate noise of the parameter information, improve data stability, and perform temperature compensation calculation on the acquired conductivity and pH value parameter information to ensure consistency of measurement results at different temperatures. The target range and the allowable deviation threshold of the conductivity and the pH are preset, and the conductivity difference and the pH difference of the discharged liquid and the supplemented liquid are calculated in real time through the acquired parameter information, and when the difference continuously lasts for a plurality of periods and the parameter of the discharged liquid enters the target range, it is determined that the liquid replacement is completed.

[0013] Further, the control output unit adopts PID control or feed-forward-feedback compound control strategy to dynamically adjust the rotation speed of the liquid supplementing pump and the opening degree of the control valve, so that the liquid supplementing flow rate and the liquid discharging flow rate are kept consistent in real time; the closed loop correction is performed through the flow meter feedback to ensure the stable system pressure.

[0014] Further, the controller further comprises a purification module and / or a dosing module; when the cooling liquid is deionized water, the purification module is connected in series with the liquid supplementing module to exchange calcium and magnesium ions in the deionized water; and the dosing module is used to add a preset medicament to the cooling liquid.

[0015] The present application has the following beneficial effects: 1. By integrating the liquid supplementing module, the liquid discharging module and the intelligent host computer, the entire liquid changing process does not require manual operation, and the complicated steps such as multiple liquid discharging, cleaning and liquid supplementing in the traditional liquid changing mode are avoided, thereby significantly saving the labor and time costs.

[0016] 2. During the liquid changing process, the personnel do not need to directly contact the cooling liquid, thereby avoiding the inhalation risk or skin corrosion caused by the volatilization or leakage of the cooling liquid, and the device is particularly suitable for occasions with limited ventilation conditions or harmful medium use.

[0017] 3. The liquid supplementing and discharging processes can achieve dynamic balance, the system pressure and flow rate are stable, the liquid cooling system can still operate normally during the liquid changing, and the device is suitable for scenarios such as data centers and communication base stations with high business continuity requirements.

[0018] 4. The device can be switched to a cleaning mode to automatically complete system cleaning and water quality detection, thereby ensuring that the cooling liquid quality meets the requirements; and through real-time monitoring of parameters such as electrical conductivity and pH value, intelligent judgment of the liquid changing end point is realized, and the maintenance precision is improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] Fig. 1 FIG. 1 is a structural schematic view of a liquid supplementing module of the present application; Fig. 2 FIG. 2 is a structural schematic view of an online liquid changing device of the present application; In the figure: 1, host computer; 2, liquid supplementing module; 21, liquid supplementing pump; 22, pH meter; 23, flow meter; 3, liquid cooling system. DETAILED DESCRIPTION

[0020] It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with embodiments.

[0021] Embodiment 1

[0022] Reference Figs. 1-2 An online liquid changing device comprises: The liquid supplementing module 2 is connected with the liquid cooling system 3, and is used for injecting the cooling liquid into the liquid cooling system 3; The liquid discharging module is connected with the liquid cooling system, and is used for discharging the cooling liquid from the liquid cooling system; The upper computer 1 is connected with the liquid supplementing module 2 and the liquid discharging module respectively, and is used for controlling the synchronization of the liquid supplementing and the liquid discharging, and judging whether the liquid changing is completed according to the real-time detected conductivity and pH value.

[0023] In the embodiment, the upper computer 1 is connected with the liquid supplementing module 2 and the liquid discharging module by wired or wireless communication mode; the upper computer has the functions of real-time data curve display and data export.

[0024] Preferably, the liquid supplementing module 2 comprises a liquid storage tank, a liquid supplementing pump 21, a flow meter 23, a pressure transmitter, a conductivity meter and a pH meter 22. The liquid storage tank is communicated with the liquid cooling system through a pipeline; wherein the liquid supplementing pump 21, the flow meter 23, the pressure transmitter, the conductivity meter and the pH meter 22 are arranged on the pipeline and are connected with the upper computer 1.

[0025] Preferably, the liquid supplementing pump 21 is a variable flow pump, and the lift thereof is greater than the static pressure requirement of the liquid cooling system.

[0026] Preferably, the liquid discharging module comprises a liquid discharging pipeline assembly, a control valve, a flow transmitter, a pressure transmitter, a conductivity transmitter and a pH sensor. The liquid discharging pipeline assembly is communicated with the liquid cooling system; wherein the control valve, the flow transmitter, the pressure transmitter, the conductivity transmitter and the pH sensor are arranged on the liquid discharging pipeline assembly respectively and are connected with the upper computer 1.

[0027] Preferably, the control valve is an electric valve or a manual valve with flow adjusting function.

[0028] Embodiment 2

[0029] The embodiment is further provided on the basis of the embodiment 1.

[0030] The upper computer 1 comprises a control module and a controller. The control module has two working modes of normal mode and cleaning mode, and has a man-machine interactive interface based on GUI, and selects the working mode and adjusts the control parameter; The control module is connected with the controller through a serial communication module, and the controller is connected with the flow meter 23, the pressure transmitter, the conductivity meter, the pH meter 22, the flow transmitter, the pressure transmitter, the conductivity transmitter, the pH sensor, the liquid supplementing pump 21 and the control valve respectively.

[0031] Preferably, the controller comprises: A data acquisition unit, the data acquisition unit is connected with the flow meter 23, the pressure transmitter, the conductivity meter, the pH meter, the flow transmitter, the pressure transmitter, the conductivity transmitter and the pH sensor respectively; for collecting parameter information; An algorithm processing unit, the algorithm processing unit is connected with the data acquisition unit, for processing and comparing the collected parameter information; A control output unit, the control output unit is connected with the algorithm processing unit, the liquid supplementing pump 21 and the control valve respectively; A cleaning unit, the cleaning unit is connected with the data acquisition unit, the liquid supplementing pump 21 and the control valve respectively, in the cleaning mode, for injecting pure water into the liquid cooling system for circulating cleaning, until the water quality is qualified and then discharged through the liquid discharge module; wherein, the conductivity of the discharged water is monitored, when the conductivity is less than or equal to the cleaning qualified setting value and lasts for a preset time, it is determined that the cleaning is completed; A data storage unit, the data storage unit is connected with the control output unit and the cleaning unit respectively, for storing detection data and processing results.

[0032] Preferably, the algorithm processing unit adopts a sliding average filter or Kalman filter algorithm to eliminate the noise of the parameter information, improve the data stability, and perform temperature compensation calculation on the collected conductivity and pH value parameter information to ensure the consistency of the measurement results at different temperatures; The target range and the allowable deviation threshold of the conductivity and the pH are set in advance, and the conductivity difference and the pH difference of the discharged liquid and the supplemented liquid are calculated in real time through the collected parameter information, when the difference value continuously lasts for a plurality of periods and is less than the set threshold, and the parameter of the discharged liquid enters the target range, it is determined that the liquid replacement is completed.

[0033] Preferably, the control output unit adopts a PID control or a feedforward-feedback compound control strategy to dynamically adjust the rotation speed of the liquid supplementing pump and the opening degree of the control valve, so that the liquid supplementing flow and the liquid discharging flow are kept in real time; through the feedback of the flow meter, the system pressure is kept stable.

[0034] In this embodiment, the controller adopts a PLC or an embedded controller.

[0035] Embodiment 3

[0036] This embodiment is further provided on the basis of embodiment 2.

[0037] Preferably, the controller further comprises a purification module and / or a dosing module; when the cooling liquid is deionized water, the purification module is connected in series with the liquid supplementing module, for exchanging calcium and magnesium ions in the deionized water; the dosing module is used for adding a preset medicament to the cooling liquid.

[0038] In the embodiment, the cooling liquid is deionized water, and the role of the purification module is to exchange calcium and magnesium ions in the deionized water, reduce the conductivity of the deionized water, and reduce the deterioration of the water quality caused by the growth of microorganisms and the potential difference of different metal materials during operation.

[0039] Working principle: Connect the output of the liquid supplement module of the device to the liquid supplement point of the liquid cooling system (such as CDU or secondary side ring network), and connect the input of the liquid discharge module to the liquid discharge point of the system. Power on the upper computer, set the liquid replacement target parameters (such as the conductivity and pH value range of the final cooling liquid) and the flow control mode (such as the equal flow mode or the pressure control mode). The upper computer uses the normal mode, first starts the liquid supplement module. The liquid supplement pump extracts new cooling liquid meeting the preset water quality standard (verified by the integrated conductivity meter and pH meter) from the liquid storage tank, and injects it into the liquid cooling system. At the same time, the upper computer instructs the control valve (such as the electric regulating valve) of the liquid discharge module to open to the corresponding opening degree, and starts to discharge the original old cooling liquid in the system. The upper computer dynamically adjusts the rotation speed of the liquid supplement pump or the opening degree of the control valve by comparing the readings of the flow meter of the liquid supplement module and the flow transmitter of the liquid discharge module in real time, to ensure that the liquid supplement rate is equal to the liquid discharge rate. This ensures that the total volume of the liquid cooling system remains unchanged, and the internal pressure is stable, so that the liquid cooling circulation of the server or switch can continue to operate normally, and the service is not interrupted. During the replacement process, the conductivity transmitter and pH sensor integrated in the liquid discharge module continuously monitor the key water quality parameters of the discharged liquid, and transmit the data to the upper computer in real time. The upper computer compares the monitored parameter values with the set target values. When the conductivity and pH value of the discharged liquid continuously and stably reach the standard of the new cooling liquid, and the difference with the target value is within the allowable range, the system determines that the liquid replacement is completed. Once the liquid replacement endpoint is reached, the upper computer sequentially closes the control valve and the liquid supplement pump, and the liquid replacement process is completed.

[0040] When it is necessary to clean the system, the device can be switched to the cleaning mode. At this time, the liquid supplement module accesses a pure water source, injects pure water into the liquid cooling system and circulates, and the liquid discharge module monitors the discharged water quality in real time. After the water quality (mainly the conductivity) meets the standard, the cleaned liquid is discharged, and the online cleaning is completed.

[0041] The above is only a preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application is included in the protection scope of the present application.

Claims

1. An on-line liquid exchange device, characterized by, The application relates to a liquid cooling system liquid replacement device. The application relates to a liquid cooling system liquid replacement device. The application relates to a liquid cooling system liquid replacement device. The application relates to a liquid cooling system liquid replacement device.

2. The online liquid exchange device according to claim 1, wherein The application relates to a liquid cooling system liquid replacement device. The application relates to a liquid cooling system liquid replacement device.

3. An on-line liquid exchange device according to claim 2, wherein The application relates to a liquid cooling system liquid replacement device.

4. An on-line liquid changing device according to claim 3, characterized in that The application relates to a liquid cooling system liquid replacement device. The application relates to a liquid cooling system liquid replacement device.

5. An on-line liquid changing device according to claim 4, characterized in that The application relates to a liquid cooling system liquid replacement device.

6. An on-line liquid exchange device according to claim 5, wherein The application relates to a liquid cooling system liquid replacement device. The application relates to a liquid cooling system liquid replacement device. The application relates to a liquid cooling system liquid replacement device.

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When the difference continuously falls below the set threshold for a plurality of periods and the effluent parameter enters the target range, it is determined that the liquid replacement is completed.

9. An on-line liquid changing device according to claim 8, characterized in that The control output unit adopts a PID control or feedforward-feedback compound control strategy to dynamically adjust the rotation speed of the liquid replenishment pump and the opening degree of the control valve, so that the liquid replenishment flow rate and the effluent flow rate are kept consistent in real time. The system pressure is ensured to be stable through closed-loop correction based on the feedback of the flow meter.

10. An on-line liquid changing device according to claim 9, characterized in that The controller further comprises a purification module and / or a dosing module. When the cooling liquid is deionized water, the purification module is connected in series with the liquid replenishment module to exchange calcium and magnesium ions in the deionized water. The dosing module is used to add a preset medicament to the cooling liquid.