Liquid cooling system for liquid-cooled computer rooms

Abstract

This invention discloses a liquid cooling system for a liquid-cooled computer room, relating to the field of liquid cooling heat dissipation. It includes: a cold source module comprising a cold source device, a main liquid supply pipeline, and a main liquid return pipeline, the cold source device forming a main cold source loop via the main liquid supply pipeline and the main liquid return pipeline; a heat exchange module comprising multiple heat exchangers connected to the main cold source loop; and a branch module comprising liquid-cooled copper busbar branches, battery pack branches, and liquid-cooled power supply module branches, each connected to the main cold source loop via a corresponding heat exchanger. This invention, by setting up a cold source module, heat exchange module, branch module, medium module, and control module, enables the liquid-cooled copper busbar branches, battery pack branches, and liquid-cooled power supply module branches to be connected to the main cold source loop via corresponding heat exchangers, thereby forming a multi-branch isolated liquid cooling architecture within the same liquid-cooled computer room.

Description

Technical Field

[0001] This invention relates to the field of liquid cooling heat dissipation, specifically to a liquid cooling system for liquid-cooled computer rooms. Background Technology

[0002] With the increasing application of liquid cooling technology in high-power electronic devices, energy storage devices, and integrated electromechanical equipment, liquid-cooled computer rooms often need to simultaneously dissipate heat from liquid-cooled copper busbars, battery packs, and liquid-cooled power modules. Since different heat-generating components differ in terms of heat load levels, operating temperature requirements, and circulating liquid compatibility, constructing a liquid cooling system within the same liquid-cooled computer room that can accommodate the heat dissipation needs of multiple heat-generating components has become an important direction in related technology applications. To this end, existing liquid cooling systems typically have a cold source-side loop, connected to different heat-generating components via multiple branches to form corresponding heat dissipation pathways. However, in liquid-cooled computer rooms, how to organically combine cold source supply, heat exchange isolation, branch connection, circulating liquid configuration and branch adjustment to form a unified liquid cooling system architecture suitable for liquid-cooled copper busbars, battery packs and liquid-cooled power modules is still a technical problem that needs to be improved. Furthermore, in the aforementioned multi-branch isolated liquid cooling architecture, since the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch are connected to the main cold source circuit through heat exchangers, when a branch experiences a decrease in flow rate, local blockage, sluggish thermal response of the circulating liquid, or a decrease in heat exchange capacity, the local thermal anomaly within that branch is not easily manifested through the overall temperature change of the main cold source circuit. In this case, if only a single temperature parameter within a single branch is used for judgment, it is difficult to distinguish between normal thermal response fluctuations and the gradual accumulation process of local heat exchange anomalies. Therefore, this invention proposes a liquid cooling system for liquid-cooled computer rooms. Summary of the Invention

[0003] The purpose of this invention is to provide a liquid cooling system for liquid-cooled computer rooms to solve the problems mentioned in the background art.

[0004] This invention can be achieved through the following technical solution: a liquid cooling system for a liquid-cooled computer room, comprising: The cold source module includes a cold source device, a main liquid supply pipeline, and a main liquid return pipeline. The cold source device forms a main cold source circuit through the main liquid supply pipeline and the main liquid return pipeline. A heat exchange module, the heat exchange module including multiple heat exchangers connected to the main cold source circuit; The branch module includes a liquid-cooled copper busbar branch, a battery pack branch, and a liquid-cooled power module branch. The liquid-cooled copper busbar branch, the battery pack branch, and the liquid-cooled power module branch are respectively connected to the main cold source circuit through corresponding heat exchangers. The medium module includes circulating liquids respectively disposed in the liquid-cooled copper busbar branch, the battery pack branch and the liquid-cooled power module branch, with each circulating liquid circulating within its respective branch. The control module is located on the liquid-cooled copper busbar branch, the battery pack branch, and the liquid-cooled power module branch, and is used to adjust the flow rate or flow rate of the circulating liquid in the corresponding branch. Among them, the branch circuit using cold plate liquid cooling and the branch circuit using immersion liquid cooling are respectively connected to the main cold source circuit through corresponding heat exchangers.

[0005] A further technical improvement of the present invention is that the cold source device is a liquid-cooled air conditioning unit or a chiller unit.

[0006] A further technical improvement of the present invention is that a pump and a control valve are respectively provided on the liquid-cooled copper busbar branch, the battery pack branch, and the liquid-cooled power module branch.

[0007] A further technical improvement of the present invention is that the circulating liquid is ethylene glycol liquid, fluorinated liquid, or phase change liquid.

[0008] A further technical improvement of the present invention is that: at least one of the liquid-cooled copper busbar branch, the battery pack branch, and the liquid-cooled power module branch is provided with a liquid storage tank, the liquid storage tank being connected to the corresponding branch and used to replenish the corresponding branch when the circulating liquid in the corresponding branch is lost.

[0009] A further technical improvement of the present invention is that: the control module acquires the temperature changes of the liquid-cooled copper busbar, the battery pack and the liquid-cooled power module, as well as the temperature changes of the circulating liquid in the corresponding branch; The thermal response offset of the corresponding branch is formed based on the difference between the temperature change of the component connected to the same branch and the temperature change of the circulating liquid in the branch; the thermal response offset of each branch is tracked within a continuous time window and the thermal response offset of each branch is compared. When the thermal response offset of any branch increases within a preset number of consecutive time windows, and the thermal response offset of that branch is higher than that of the other branches and exceeds the thermal response offset threshold, it is determined that there is a local heat exchange anomaly in that branch, and the pumps and control valves on that branch are controlled to increase the flow rate or flow rate of the circulating liquid in that branch.

[0010] A further technical improvement of the present invention is that the step of comparing the thermal response offset of each branch by the control module includes: Within each consecutive time window, the thermal response offsets of the branches other than the branch to be judged are sorted according to their size. The thermal response offset in the middle of the sort is taken as the reference offset of the branch to be judged, and the offset difference between the thermal response offset of the branch to be judged and the reference offset is calculated. If the thermal response offset of any branch is higher than that of the other branches and exceeds the thermal response offset threshold, including if the offset difference of the branch is higher than the corresponding offset difference of the other branches and the offset difference of the branch exceeds the offset difference threshold.

[0011] A further technical improvement of the present invention is that the offset difference threshold is determined according to the following steps: When the liquid-cooled copper busbar branch, battery pack branch and liquid-cooled power module branch are all in normal heat exchange state, the thermal response offset of each branch in each continuous time window is continuously acquired within the preset acquisition period. Within each consecutive time window, each of the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch is taken as the branch to be judged in sequence. The thermal response offsets of the remaining branches other than the branch to be judged are sorted according to their size. The thermal response offset in the middle of the sort is taken as the reference offset of the corresponding branch to be judged. Calculate the offset difference between the thermal response offset of each branch to be judged and the corresponding reference offset within each continuous time window to form a sample sequence of offset difference values ​​for each branch to be judged under normal heat exchange conditions. The offset difference sample sequences corresponding to the liquid-cooled copper busbar branch, battery pack branch and liquid-cooled power module branch are sorted respectively. The offset difference values ​​located at the preset upper limit position in each offset difference sample sequence are extracted, and the maximum value of each extracted offset difference value is determined as the offset difference threshold.

[0012] A further technical improvement of the present invention is that the thermal response offset threshold is determined according to the following steps: During the operation of the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch, the operating period in which the temperature of the main cold source circuit remains within the fluctuation range and the flow rate or flow rate of the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch remains within the set value range is selected as the normal heat exchange sample period. During the normal heat exchange sample period corresponding to each branch, the thermal response offset change between the temperature change of the connected component and the temperature change of the circulating liquid in the branch is tracked, and the segment with continuous fluctuation of thermal response offset without abnormal growth is extracted as the offset stable segment. The upper boundary values ​​of thermal response offset for the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch within their respective offset stability zones are determined, and the maximum value among these upper boundary values ​​is determined as the thermal response offset threshold.

[0013] Compared with the prior art, the present invention has the following beneficial effects: This invention, by setting up a cold source module, a heat exchange module, a branch module, a medium module, and a control module, connects the liquid-cooled copper busbar branch, the battery pack branch, and the liquid-cooled power supply module branch to the main cold source circuit through corresponding heat exchangers, thereby forming a multi-branch isolated liquid-cooling architecture within the same liquid-cooled equipment room. This liquid-cooling system can integrate cold source supply, heat exchange isolation, branch connection, and circulating liquid configuration into a unified system, which is beneficial for adapting to the heat dissipation requirements of the liquid-cooled copper busbar, battery pack, and liquid-cooled power supply module. Furthermore, this invention further configures circulating liquid in the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch respectively, and adjusts the flow rate or flow rate of the circulating liquid in the corresponding branch through the control module, so that different branches can operate under relatively independent conditions for heat exchange. As a result, this invention is beneficial to reduce the thermal mutual influence between different heat-generating components and to improve the liquid cooling adaptability of various heat-generating components in the liquid-cooled computer room. On the other hand, based on the aforementioned multi-branch isolated liquid cooling architecture, this invention also obtains the temperature changes of the liquid-cooled copper busbar, battery pack, and liquid-cooled power module, as well as the temperature changes of the circulating liquid in the corresponding branch, to form the thermal response offset of each branch. By combining the changes in the thermal response offset within a continuous time window, local heat transfer anomalies can be identified and adjusted. Therefore, this invention is beneficial for identifying abnormal branches under multi-branch isolated operation conditions and implementing targeted adjustments to abnormal branches, thereby improving the operational stability of the liquid cooling system in the liquid-cooled computer room. Attached Figure Description

[0014] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to the accompanying drawings.

[0015] Figure 1 This is a schematic diagram of the structure of Embodiment 1 of the present invention. Detailed Implementation

[0016] To further illustrate the technical means and effects of the present invention in achieving its intended purpose, the following detailed description of the specific implementation methods, structures, features, and effects of the present invention, in conjunction with the accompanying drawings and preferred embodiments, is provided.

[0017] Example 1 Please see Figure 1 As shown, the present invention provides a liquid cooling system for a liquid-cooled computer room, including a cold source module, a heat exchange module, a branch module, a medium module, and a control module.

[0018] The cold source module is used to establish the main cold source loop; the heat exchange module is used to form heat exchange connections between the main cold source loop and each branch. The branch module is used to establish liquid-cooled copper busbar branches, battery pack branches, and liquid-cooled power module branches respectively; The media module is used to configure circulating liquid in each branch; The control module is used to adjust the flow rate or volume of circulating liquid in each branch.

[0019] In this embodiment, the cold source module includes a cold source device, a main liquid supply pipeline, and a main liquid return pipeline. The cold source device can be either a liquid-cooled air conditioning unit or a chiller unit. Figure 1 In the structure shown, the upper-level cold source section is equipped with a liquid-cooled air conditioning unit or a chiller unit. The liquid-cooled air conditioning unit or chiller unit is connected to the main liquid supply pipeline and the main liquid return pipeline, thus forming the main cold source loop that runs through the liquid cooling system. The main cold source loop serves as a common cooling capacity channel, providing the heat exchange foundation for the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch. Cooling capacity is output through the main liquid supply pipeline, and the return liquid from each branch after heat exchange is recovered through the main liquid return pipeline, thereby completing the cyclic operation of the main cold source loop.

[0020] The heat exchange module includes multiple heat exchangers connected to the main cold source circuit. These heat exchangers are respectively located between the liquid-cooled copper busbar branch, the battery pack branch, and the liquid-cooled power module branch and the main cold source circuit.

[0021] In this embodiment, the heat exchanger includes heat exchangers C1 to Cm (where m is a positive integer greater than 1) disposed in the liquid-cooled copper busbar side branch, and heat exchangers P1 and P2 disposed in the liquid-cooled power module side branch. Heat exchangers C1 to Cm are disposed between the liquid-cooled copper busbar branch and the battery pack branch and the main cold source circuit, while heat exchangers P1 and P2 are disposed between the liquid-cooled power module branch and the main cold source circuit.

[0022] The branch module includes a liquid-cooled copper busbar branch, a battery pack branch, and a liquid-cooled power module branch. The liquid-cooled copper busbar branch connects the liquid-cooled copper busbar to the corresponding heat exchanger, the battery pack branch connects the battery pack to the corresponding heat exchanger, and the liquid-cooled power module branch connects the liquid-cooled power module to the corresponding heat exchanger. In this embodiment, the liquid-cooled copper busbar branch is located in the left-side liquid-cooled copper busbar area. As the liquid flows inside the liquid-cooled copper busbar, it carries away the heat dissipated by the busbar. The battery pack branch is located in the branch area where the battery pack is located. The battery pack can exchange heat with the circulating liquid in the branch through a corresponding liquid-cooling structure.

[0023] In this embodiment, the liquid-cooled copper busbars have internal liquid flow channels, and the liquid-cooled copper busbars are connected by connecting pipes, which are made of insulated flexible tubing. The liquid-cooled copper busbars can be overlapped or extended depending on the installation location. The positions of the connecting screw holes avoid communication with the liquid flow channels, and the periphery of the holes is sealed. For liquid-cooled copper busbars with different voltages or potentials, there is no conductive overlap between them. The corresponding liquid pipelines are connected in series or in parallel according to the layout of the liquid cooling system.

[0024] In this embodiment, the battery pack is provided with a liquid cooling structure that fits against the outer wall of the battery pack. The liquid cooling structure has a liquid flow channel inside, through which the circulating liquid in the battery pack branch exchanges heat with the battery pack. The liquid cooling structure can be located at the bottom, side, or outer peripheral wall of the battery pack and is connected to the battery pack branch via a connecting pipe, allowing the circulating liquid to enter the liquid cooling structure from the battery pack branch and then return to the battery pack branch.

[0025] The liquid-cooled power module branch is located in the right-side power system area. Each liquid-cooled power module is connected to its corresponding power system branch and is connected to the main cold source circuit through the corresponding heat exchangers in heat exchangers P1 and P2. In this embodiment, multiple liquid-cooled power modules are arranged within the same power system. Each liquid-cooled power module is connected to a liquid-cooled power module branch. The circulating liquid in the liquid-cooled power module branch flows sequentially through multiple liquid-cooled power modules before entering the corresponding heat exchanger, or flows through multiple liquid-cooled power modules separately before converging into the corresponding heat exchanger. The liquid-cooled power module branch forms a series liquid circuit or a parallel liquid circuit according to the power system arrangement, allowing multiple liquid-cooled power modules to be connected to their corresponding heat exchangers through the liquid-cooled power module branch.

[0026] Thus, liquid-cooled copper busbar branches, battery pack branches, and liquid-cooled power module branches are formed within the liquid-cooled equipment room. These branches are connected to the main cold source circuit via corresponding heat exchangers. The circulating liquid in each branch circulates within its respective branch and returns to its original branch after passing through the corresponding heat exchanger.

[0027] The dielectric module includes circulating liquids respectively disposed in the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch. In this embodiment, the circulating liquids in each branch can be selected according to the operating requirements of the corresponding heat-generating components. The circulating liquids can be any one of ethylene glycol liquid, fluorinated liquid, or phase change liquid.

[0028] For liquid-cooled copper busbar branches, a suitable circulating liquid can be selected based on the thermal conductivity and insulation requirements of the liquid-cooled copper busbar. For battery pack branches, a suitable circulating fluid can be selected based on the heat dissipation characteristics and safety requirements of the battery pack. For the liquid-cooled power module branch, a suitable circulating liquid can be selected based on the heat load level and thermal response characteristics of the liquid-cooled power module.

[0029] Each circulating liquid circulates within its respective branch, exchanging heat with the main cold source circuit through its corresponding heat exchanger. Within the same liquid-cooled equipment room, different types of circulating liquids are configured in the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch.

[0030] In this embodiment, pumps and control valves are respectively installed on the liquid-cooled copper busbar branch, the battery pack branch, and the liquid-cooled power module branch. The pumps are used to drive the flow of circulating liquid in the corresponding branch, and the control valves are used to regulate the flow state of the circulating liquid in the corresponding branch.

[0031] Pumps are installed in the branch pipelines to provide flow power for the circulating liquid in the branch. The control valve is located in the pipeline where the pump is located or in an adjacent pipeline, and is used to adjust the flow rate or flow rate according to the operating status of the branch.

[0032] The control module is located on the liquid-cooled copper busbar branch, the battery pack branch, and the liquid-cooled power module branch. By controlling the pumps and control valves in the corresponding branches, the flow rate or volume of the circulating liquid in the corresponding branches is adjusted.

[0033] In this embodiment, at least one of the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch is equipped with a liquid storage tank. When the circulating liquid in the liquid-cooled power module branch is lost due to maintenance, leakage, or evaporation, the liquid storage tank replenishes the circulating liquid to the liquid-cooled power module branch; when the circulating liquid in the liquid-cooled copper busbar branch and battery pack branch is lost, the liquid storage tank replenishes the corresponding branch.

[0034] In this embodiment, the cold plate liquid cooling branch and the immersion liquid cooling branch are respectively connected to the main cold source circuit through corresponding heat exchangers. The cold plate liquid cooling branch and the immersion liquid cooling branch can be applied to the liquid cooling structure where the liquid-cooled copper busbar, battery pack, or liquid-cooled power module is located.

[0035] The operation process of this embodiment is as follows: After the cold source equipment is started, it outputs cooling capacity to the main cold source circuit through the main liquid supply pipeline. The coolant in the main cold source circuit circulates between the liquid-cooled air conditioning unit or chiller, the main liquid supply pipeline and the main liquid return pipeline. The circulating liquid in the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch circulates within their respective branches and flows through the corresponding heat exchangers before returning to the original branch to continue circulating. The control module controls the pumps and control valves in the corresponding branches according to the heat dissipation requirements of the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch, so as to adjust the flow rate or flow rate of the circulating liquid in the corresponding branch. When circulating fluid is lost in any branch, the storage tank located on that branch replenishes the corresponding branch.

[0036] Example 2 Compared to Example 1, the control module in Example 2 acquires the temperature changes of the liquid-cooled copper busbar, battery pack, and liquid-cooled power module, as well as the temperature changes of the circulating liquid within the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch. The control module generates a thermal response offset for each branch based on the difference between the temperature change of the component connected to that branch and the temperature change of the circulating liquid within that branch.

[0037] In this embodiment, the control module tracks the thermal response offset changes of each branch within a continuous time window and compares the thermal response offsets of each branch. Within each continuous time window, the control module sorts the thermal response offsets of the branches other than the branch to be judged according to their magnitude, takes the thermal response offset in the middle of the sort as the reference offset of the branch to be judged, and calculates the offset difference between the thermal response offset of the branch to be judged and the reference offset. When the liquid-cooled copper busbar branch, the battery pack branch, and the liquid-cooled power module branch are respectively used as branches to be judged, corresponding offset differences are formed respectively.

[0038] In this embodiment, the offset difference threshold is determined as follows: when the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch are all in normal heat exchange state, the thermal response offset of each branch within each continuous time window is continuously acquired within a preset acquisition period; the preset acquisition period is determined based on the continuous monitoring duration under rated operating conditions.

[0039] In this embodiment, the normal heat exchange state is characterized by continuous operation of the main cold source circuit, continuous operation of the liquid-cooled copper busbar branch, the battery pack branch, and the liquid-cooled power module branch, with the flow rate or velocity of the circulating liquid in each branch within a set range, the corresponding heat exchangers maintaining heat exchange continuity, and no localized heat exchange anomalies observed in the liquid-cooled copper busbar, battery pack, and liquid-cooled power module. In this embodiment, the set range is determined based on the flow rate or velocity fluctuation range of the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch under rated operating conditions.

[0040] Within each consecutive time window, each branch of the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch is sequentially selected as the branch to be judged. The thermal response offsets of the remaining branches are sorted according to their magnitude, and the thermal response offset in the middle of the sort is taken as the reference offset of the corresponding branch to be judged. The offset difference between the thermal response offset of each branch to be judged and the corresponding reference offset is calculated within each consecutive time window to form a sample sequence of offset difference values ​​for each branch to be judged under normal heat exchange conditions. The sample sequences of offset difference values ​​corresponding to the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch are sorted, and the offset difference value located at the preset upper limit position in each offset difference sample sequence is extracted. The maximum value among the extracted offset difference values ​​is determined as the offset difference threshold.

[0041] In this embodiment, the preset upper limit position is the preset sorting position on the high-value side after the offset difference sample sequences are sorted according to their size. The preset sorting position is determined based on the upper limit of the natural fluctuation of the offset difference sample sequences under normal heat exchange conditions, and is used to extract the offset difference values ​​in the offset difference sample sequences that are close to the upper boundary of the natural fluctuation. In this embodiment, the upper limit of the natural fluctuation of the offset difference sample sequences under normal heat exchange conditions can be determined by statistically analyzing the high-value distribution range of each offset difference sample sequence within a preset acquisition period; the preset sorting position is set within the sorting segment corresponding to the high-value distribution range to avoid directly using occasional anomalies as the basis for determining the offset difference threshold.

[0042] In this embodiment, the thermal response offset in the middle of the sorting is the thermal response offset that is located in the middle position after arranging the thermal response offsets of the other branches besides the branch to be judged according to their size.

[0043] In this embodiment, the thermal response offset threshold is determined as follows: During the operation of the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch, the operating period in which the temperature of the main cold source circuit remains within the fluctuation range and the flow rate or flow rate of the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch remains within the set value range is selected as the normal heat exchange sample period; within the normal heat exchange sample period corresponding to each branch, the change in thermal response offset formed between the temperature change of the connected components and the temperature change of the circulating liquid in the branch is tracked, and the segment in which the thermal response offset fluctuates continuously without abnormal growth is extracted as the offset stable segment; in this embodiment, the offset stable segment is the segment in which the thermal response offset fluctuates within adjacent continuous time windows and does not exceed the abnormal growth boundary.

[0044] The upper boundary values ​​of thermal response offset for the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch within their respective offset stability sections are determined. The maximum value among these upper boundary values ​​is then used as the thermal response offset threshold. In this embodiment, the upper boundary value of the thermal response offset is the maximum value of the thermal response offset within the corresponding offset stability section, used to characterize the upper limit of stable fluctuation of the thermal response offset of the corresponding branch under normal heat exchange conditions. In this embodiment, the maximum value of the thermal response offset within the corresponding offset stability section is obtained by traversing the thermal response offset corresponding to each consecutive time window within the offset stability section, and is used as the basis for determining the upper limit of the offset for that branch under normal heat exchange conditions.

[0045] In this embodiment, the abnormal growth boundary is the upper limit of the allowable increase in thermal response offset between adjacent consecutive time windows under normal heat exchange conditions. When the increase in thermal response offset between adjacent consecutive time windows exceeds the allowable upper limit, it is determined that the thermal response offset has abnormally increased. In this embodiment, the allowable upper limit is determined based on the natural fluctuation range of the increase in thermal response offset between adjacent consecutive time windows within the normal heat exchange sample period, and the upper boundary of the natural fluctuation range is used as the abnormal growth boundary.

[0046] The control module identifies branches with localized heat transfer anomalies based on thermal response offset, offset difference, thermal response offset threshold, and offset difference threshold. When the thermal response offset of any branch increases within a preset number of consecutive time windows, and the thermal response offset of that branch is higher than that of the other branches and exceeds the thermal response offset threshold, the control module determines whether the offset difference of that branch is higher than the corresponding offset difference of the other branches, and whether the offset difference of that branch exceeds the offset difference threshold. When the above conditions are met, it is determined that there is a localized heat transfer anomaly in that branch.

[0047] In this embodiment, when a branch is determined to have a local heat exchange anomaly, the control module controls the pumps and control valves on that branch to increase the flow rate or volume of the circulating liquid within that branch. Taking the liquid-cooled copper busbar branch as an example, when a local heat exchange anomaly is determined to exist in the liquid-cooled copper busbar branch, the control module controls the pumps and control valves on the liquid-cooled copper busbar branch to increase the flow rate or volume of the circulating liquid within the liquid-cooled copper busbar branch; taking the battery pack branch as an example, when a local heat exchange anomaly is determined to exist in the battery pack branch, the control module controls the pumps and control valves on the battery pack branch to increase the flow rate or volume of the circulating liquid within the battery pack branch; taking the liquid-cooled power module branch as an example, when a local heat exchange anomaly is determined to exist in the liquid-cooled power module branch, the control module controls the pumps and control valves on the liquid-cooled power module branch to increase the flow rate or volume of the circulating liquid within the liquid-cooled power module branch.

[0048] During operation of this embodiment, the control module identifies local heat exchange abnormal branches based on the thermal response offset, thermal response offset threshold, and offset difference threshold of each branch, and controls the pumps and control valves on the abnormal branches to increase the flow rate or volume of the circulating liquid in the corresponding branch.

[0049] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent changes and alterations made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the scope of the present invention.

Claims

1. A liquid cooling system for a liquid-cooled computer room, characterized in that, include: The cold source module includes a cold source device, a main liquid supply pipeline, and a main liquid return pipeline. The cold source device forms a main cold source circuit through the main liquid supply pipeline and the main liquid return pipeline. A heat exchange module, the heat exchange module including multiple heat exchangers connected to the main cold source circuit; The branch module includes a liquid-cooled copper busbar branch, a battery pack branch, and a liquid-cooled power module branch. The liquid-cooled copper busbar branch, the battery pack branch, and the liquid-cooled power module branch are respectively connected to the main cold source circuit through corresponding heat exchangers. The medium module includes circulating liquids respectively disposed in the liquid-cooled copper busbar branch, the battery pack branch and the liquid-cooled power module branch, with each circulating liquid circulating within its respective branch. The control module is located on the liquid-cooled copper busbar branch, the battery pack branch, and the liquid-cooled power module branch, and is used to adjust the flow rate or flow rate of the circulating liquid in the corresponding branch. Among them, the branch circuit using cold plate liquid cooling and the branch circuit using immersion liquid cooling are respectively connected to the main cold source circuit through corresponding heat exchangers.

2. The liquid cooling system for a liquid-cooled computer room according to claim 1, characterized in that, The cooling source equipment is a liquid-cooled air conditioning unit or a water chiller.

3. A liquid cooling system for a liquid-cooled computer room according to claim 1, characterized in that, Pumps and control valves are respectively installed on the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch.

4. A liquid cooling system for a liquid-cooled computer room according to claim 1, characterized in that, The circulating liquid is ethylene glycol liquid, fluorinated liquid, or phase change liquid.

5. A liquid cooling system for a liquid-cooled computer room according to claim 1, characterized in that, At least one of the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch is equipped with a liquid storage tank, which is connected to the corresponding branch and is used to replenish the corresponding branch when the circulating liquid in the corresponding branch is lost.

6. A liquid cooling system for a liquid-cooled computer room according to claim 1, characterized in that, The control module acquires the temperature changes of the liquid-cooled copper busbar, battery pack, and liquid-cooled power module, as well as the temperature changes of the circulating liquid in the corresponding branch. The thermal response offset of the corresponding branch is formed by the difference between the temperature change of the component connected to the same branch and the temperature change of the circulating liquid in the branch. Track the thermal response offset changes of each branch within a continuous time window and compare the thermal response offsets of each branch; When the thermal response offset of any branch increases within a preset number of consecutive time windows, and the thermal response offset of that branch is higher than that of the other branches and exceeds the thermal response offset threshold, it is determined that there is a local heat exchange anomaly in that branch, and the pumps and control valves on that branch are controlled to increase the flow rate or flow rate of the circulating liquid in that branch.

7. A liquid cooling system for a liquid-cooled computer room according to claim 6, characterized in that, The step of comparing the thermal response offset of each branch in the control module includes: Within each consecutive time window, the thermal response offsets of the branches other than the branch to be judged are sorted according to their size. The thermal response offset in the middle of the sort is taken as the reference offset of the branch to be judged, and the offset difference between the thermal response offset of the branch to be judged and the reference offset is calculated. If the thermal response offset of any branch is higher than that of the other branches and exceeds the thermal response offset threshold, including if the offset difference of the branch is higher than the corresponding offset difference of the other branches and the offset difference of the branch exceeds the offset difference threshold.

8. A liquid cooling system for a liquid-cooled computer room according to claim 7, characterized in that, The offset difference threshold is determined according to the following steps: When the liquid-cooled copper busbar branch, battery pack branch and liquid-cooled power module branch are all in normal heat exchange state, the thermal response offset of each branch in each continuous time window is continuously acquired within the preset acquisition period. Within each consecutive time window, each of the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch is taken as the branch to be judged in sequence. The thermal response offsets of the remaining branches other than the branch to be judged are sorted according to their size. The thermal response offset in the middle of the sort is taken as the reference offset of the corresponding branch to be judged. Calculate the offset difference between the thermal response offset of each branch to be judged and the corresponding reference offset within each continuous time window to form a sample sequence of offset difference values ​​for each branch to be judged under normal heat exchange conditions. The offset difference sample sequences corresponding to the liquid-cooled copper busbar branch, battery pack branch and liquid-cooled power module branch are sorted respectively. The offset difference values ​​located at the preset upper limit position in each offset difference sample sequence are extracted, and the maximum value of each extracted offset difference value is determined as the offset difference threshold.

9. A liquid cooling system for a liquid-cooled computer room according to claim 6, characterized in that, The thermal response offset threshold is determined according to the following steps: During the operation of the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch, the operating period in which the temperature of the main cold source circuit remains within the fluctuation range and the flow rate or flow rate of the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch remains within the set value range is selected as the normal heat exchange sample period. During the normal heat exchange sample period corresponding to each branch, the thermal response offset change between the temperature change of the connected component and the temperature change of the circulating liquid in the branch is tracked, and the segment with continuous fluctuation of thermal response offset without abnormal growth is extracted as the offset stable segment. The upper boundary values ​​of thermal response offset for the liquid-cooled copper busbar branch, battery pack branch, and liquid-cooled power module branch within their respective offset stability zones are determined, and the maximum value among these upper boundary values ​​is determined as the thermal response offset threshold.

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