Liquid adding device of liquid cooling machine

Abstract

The utility model discloses a liquid adding device of a liquid cooling machine, the liquid cooling machine is provided with a liquid adding port close to the top, the liquid adding device of the liquid cooling machine comprises a conveying pipeline, a water pump, a liquid level sensor and a control unit, and the conveying pipeline is used for extending to the liquid adding port and conveying liquid to the liquid cooling machine from the liquid adding port; the water pump is arranged in the conveying pipeline and used for providing driving force for the conveying pipeline to convey liquid; the liquid level sensor is used for being arranged in the liquid cooling machine and detecting the liquid level in the liquid cooling machine. The control unit is connected with the liquid level sensor and the water pump and used for starting the water pump to convey liquid to the liquid cooling machine when the liquid level detected by the liquid level sensor is lower than a preset liquid level, and the technical problem of how to relieve liquid adding inconvenience of the liquid cooling machine is solved.

Description

Technical Field

[0001] This application relates to the field of liquid cooling equipment technology, and in particular to a liquid cooler filling device. Background Technology

[0002] Liquid chillers are a commonly used cooling device, widely applied in battery cooling, industrial equipment cooling, and other fields. They achieve cooling by circulating coolant in a cooling circuit, removing heat generated by the heat source equipment.

[0003] However, some liquid chillers on the market currently lack automatic coolant replenishment, requiring manual replenishment during initial installation or maintenance. Since the coolant inlet of a liquid chiller is typically located at a high position, sometimes exceeding 1.5 meters, the replenishment operation is inconvenient. During the replenishment process, operators need to use ladders or other tools for working at height, increasing the difficulty and posing safety hazards. Furthermore, uneven coolant flow or difficulty in controlling the injection speed during replenishment leads to significant fluctuations in the coolant level, further exacerbating the risk of overflow. If coolant overflows into the equipment's ventilation holes or electronic component areas, it can cause short circuits, corrosion, and equipment malfunctions, severely impacting the normal operation and lifespan of the liquid chiller. Utility Model Content

[0004] One objective of this application is to provide a liquid filling device for a liquid chiller, which aims to solve the technical problem of how to alleviate the inconvenience of filling liquid chillers.

[0005] To achieve the above objectives, this application provides a solution as follows: a liquid chiller filling device, wherein the liquid chiller has a filling port near the top, the liquid chiller filling device includes a delivery pipeline extending to the filling port and delivering liquid from the filling port to the liquid chiller; a water pump disposed in the delivery pipeline for providing driving force for delivering liquid through the delivery pipeline; a liquid level sensor disposed inside the liquid chiller for detecting the liquid level inside the liquid chiller; and a control unit connected to the liquid level sensor and the water pump respectively, for starting the water pump to deliver liquid to the liquid chiller when the liquid level detected by the liquid level sensor is lower than a preset liquid level.

[0006] Optionally, the liquid cooler liquid filling device also includes a liquid storage container, and the conveying pipeline includes: a liquid inlet, which extends into and communicates with the liquid storage container, for introducing the liquid in the liquid storage container into the conveying pipeline; and a liquid outlet, which is connected to or faces the liquid filling port, for leading the liquid in the conveying pipeline out to the liquid filling port.

[0007] Optionally, the liquid cooler liquid filling device includes a liquid collecting structure located below the liquid filling port to collect liquid overflowing from the liquid filling port.

[0008] Optionally, the height of the liquid collection structure is higher than the height of the liquid storage container. The liquid cooler liquid filling device also includes a return pipeline, which connects the liquid collection structure and the liquid storage container, and is used to recover the liquid collected by the liquid collection structure to the liquid storage container.

[0009] Optionally, the liquid cooler filling device also includes an overflow sensor connected to the control unit. The overflow sensor is set at a predetermined position on the inner wall of the liquid collection structure and is used to send an alarm signal to the control unit when the liquid in the liquid collection structure reaches the predetermined position, thereby triggering the control unit to control the water pump to stop working.

[0010] Optionally, the liquid cooler filling device further includes a stop valve connected to the control unit. The stop valve is located at one end of the delivery pipeline near the liquid outlet. The stop valve is used to switch to the closed state when the control unit receives an alarm signal so that the liquid outlet stops delivering liquid to the liquid cooler.

[0011] Optionally, the liquid cooler liquid filling device further includes: a pressure buffer tank, which is disposed in the delivery pipeline and located downstream of the water pump. The pressure buffer tank includes an elastic buffer membrane that divides the interior of the pressure buffer tank into a gas chamber and a liquid chamber, and the liquid chamber is connected in series in the delivery pipeline.

[0012] Optionally, the pressure buffer tank has an air vent that connects the air chamber to the external environment, and the air vent is equipped with a valve to control the connection between the air chamber and the external environment.

[0013] Optionally, a check valve is installed in the delivery pipeline, located between the liquid chamber and the water pump, so that only liquid is allowed to flow from the water pump to the liquid chamber.

[0014] Optionally, the liquid cooler filling device also includes a filter screen, which is installed in the delivery pipeline to prevent impurities from entering the filling port.

[0015] The beneficial effects of this application are as follows:

[0016] Compared to traditional manual coolant filling methods, this application utilizes a delivery pipeline and water pump within the coolant filling device of the liquid chiller to achieve coolant delivery to the high-level filling port, effectively solving the operational inconvenience and safety hazards caused by the high height of the filling port. Simultaneously, this application incorporates a liquid level sensor inside the liquid chiller to monitor liquid level changes and transmits the signals to the control unit. The control unit then regulates the water pump; when the liquid level falls below a preset value, the control unit automatically starts the water pump to perform the filling operation. The entire coolant filling process is automated, requiring no manual intervention. This not only improves filling efficiency but also effectively avoids insufficient or excessive filling caused by manual operation, significantly enhancing the intelligence level and reliability of the filling device. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of a liquid cooler liquid filling device provided in an embodiment of this application;

[0019] Figure 2 This is a schematic diagram of another liquid cooler liquid filling device provided in an embodiment of this application;

[0020] Figure 3 This is provided by the embodiments of this application. Figure 2 A magnified view of a portion of region A in the middle;

[0021] Figure 4 This is a schematic diagram of another liquid cooler liquid filling device provided in the embodiments of this application.

[0022] Explanation of icon numbers:

[0023] 100. Delivery pipeline; 101. Liquid inlet; 102. Liquid outlet; 200. Water pump; 300. Liquid level sensor; 400. Control unit; 500. Liquid storage container; 600. Liquid collection structure; 601. Liquid collection surface; 700. Return pipeline; 701. Return pump; 800. Overflow sensor; 900. Termination valve; 110. Pressure buffer tank; 111. Elastic buffer membrane; 112. Air chamber; 113. Liquid chamber; 114. Air vent; 115. Air valve; 120. Check valve; 130. Filter screen; 140. Liquid cooler; 141. Liquid inlet. Detailed Implementation

[0024] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0025] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of this application are only used to explain the relative positional relationship and movement of each component in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0026] It should also be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on the other component or may be connected to an intermediary component. When a component is referred to as being "connected to" another component, it can be directly connected to the other component or indirectly connected to the other component through an intermediary component.

[0027] Please see Figure 1 , Figure 1 This is a schematic diagram of the structure of a liquid cooler liquid filling device provided in an embodiment of this application.

[0028] This application provides a liquid filling device for a liquid chiller, aiming to alleviate the inconvenience of the liquid filling process for a liquid chiller 140. The device specifically includes a delivery pipeline 100, a water pump 200, a liquid level sensor 300, and a control unit 400. These components cooperate to achieve automated liquid filling.

[0029] The delivery pipeline 100 serves as the coolant delivery channel for the liquid cooler 140, enabling the delivery of coolant from a low position to the liquid coolant inlet 141 of the liquid cooler 140. One end of the delivery pipeline 100 is connected to the coolant source, and the other end extends to the liquid coolant inlet 141 of the liquid cooler 140. It can be understood that when the other end extends to the liquid coolant inlet 141, it can be connected to the inlet 141 or not connected at all, simply facing the inlet 141, as long as the liquid flowing from the other end can smoothly enter the inlet 141. In this way, this application avoids the tedious operation of manually carrying coolant to a higher position, reducing the operational burden. Secondly, a water pump 200 is installed in the delivery pipeline 100 as a power source for adding coolant. It can quickly build up pressure when the liquid level is low or air is present in the pipeline, smoothly delivering the coolant to the liquid coolant inlet 141 of the liquid cooler 140, effectively addressing the problem of unstable flow rate in traditional gravity-based adding systems.

[0030] In addition, this embodiment includes a liquid level sensor 300 and a control unit 400. The liquid level sensor 300 is located inside the liquid cooler 140 and can detect the coolant level in real time. The liquid level sensor 300 can be a float-type, capacitive, or ultrasonic sensor, and can be flexibly configured according to specific application scenarios. The control unit 400 is the core control module of the entire liquid filling device, which integrates signal processing and drive control circuits and is connected to the liquid level sensor 300 and the water pump 200. The liquid level sensor 300 can transmit the detected liquid level signal to the control unit 400 in real time. When the liquid level is lower than a preset value, the control unit 400 starts the water pump 200 to add liquid. Conversely, when the liquid level is higher than the preset value, the control unit 400 will not start the water pump 200, that is, it will stop adding liquid to the liquid cooler 140. For example, the liquid level signal is a level signal. A comparator can be used to compare this level signal with a fixed level corresponding to a preset value. A low level indicates that the liquid level is lower than the preset value. This comparator can be a comparator independent of the control unit 400, or it can be a comparator built into the control unit 400. Thus, when the liquid level reaches the set value, the control unit 400 stops the water pump 200 to prevent excessive liquid injection and ensure that the coolant is always maintained within the normal operating range.

[0031] In this embodiment, by setting up a delivery pipeline 100 and a water pump 200, the automatic delivery of coolant from the low-level to the high-level filling port 141 is achieved, avoiding the inconvenience and safety hazards caused by the high height of the filling port 141 during manual operation. Simultaneously, by configuring a liquid level sensor 300 inside the liquid cooler 140, real-time monitoring of coolant level changes is achieved, and the detection signal is transmitted to the control unit 400, realizing closed-loop regulation of liquid level monitoring and water pump 200 control. When the liquid level is lower than a preset value, the control unit 400 automatically starts the water pump 200 to perform the filling operation, and automatically stops when the liquid level reaches the predetermined height, effectively preventing overflow caused by overfilling of coolant. The entire coolant filling process is automatic, requiring no manual intervention, which not only improves filling efficiency but also effectively avoids problems of insufficient or excessive filling caused by manual operation.

[0032] In some optimized embodiments, the coolant filling device further includes a storage container 500 for storing coolant and delivering coolant to the coolant inside the coolant 140 when needed. The storage container 500 is typically made of corrosion-resistant materials, has good sealing properties and structural strength, and can store coolant for extended periods without leakage or deterioration, providing coolant supply during filling operations.

[0033] The delivery pipeline 100 includes two functional ports: an inlet 101 and an outlet 102. The inlet 101 is located at the beginning of the delivery pipeline 100 and extends into the interior of the storage container 500, communicating with it to allow coolant from the storage container 500 to be introduced into the delivery pipeline 100. Simultaneously, to prevent air from entering during the pumping process, the inlet 101 is typically located at the bottom or a lower liquid level area of ​​the storage container 500, ensuring smooth entry of liquid into the delivery pipeline 100. The outlet 102 is located at the end of the delivery pipeline 100, connected to or facing the filling port 141 of the liquid cooler 140. During the filling operation, the fluid pressure generated by the water pump 200 causes the coolant to flow along the delivery pipeline 100, and the coolant is delivered to the filling port 141 of the liquid cooler 140 through the outlet 102, thus completing the filling operation.

[0034] In this embodiment, the addition of a liquid storage container 500 ensures an adequate supply of coolant. The inlet 101 is connected to the liquid storage container 500 to ensure that the coolant can smoothly enter the delivery pipeline 100. The precise connection between the outlet 102 and the filling port 141 enables the coolant in the delivery pipeline 100 to be efficiently injected into the liquid chiller 140, effectively improving the convenience and reliability of the liquid chiller 140's liquid filling operation.

[0035] Please see Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of another liquid cooler liquid filling device provided in an embodiment of this application. Figure 3 This is provided by the embodiments of this application. Figure 2 A magnified view of a portion of area A. Considering the overflow problem during the liquid filling process, some optimized embodiments further include a liquid collection structure 600 in the liquid cooler filling device. This structure collects coolant overflows caused by excessive flow rate, improper liquid level control, or other operational errors during the filling operation. The liquid collection structure 600 is typically installed below or near the liquid filling port 141 of the liquid cooler 140, and can quickly collect overflowing coolant to prevent liquid contamination of the equipment surface or the ground.

[0036] The liquid collection structure 600 typically takes the form of a collection tank or drip tray, with a certain volume to hold a large amount of coolant. In terms of installation, the liquid collection structure 600 is usually fixed below the liquid coolant inlet 141 of the liquid chiller 140 by a bracket or clips. Its collection surface 601 is designed as a funnel or inclined surface, which can quickly guide the coolant into the tank and prevent liquid from splashing everywhere. To further improve the collection efficiency, the opening area of ​​the collection tank is usually large, effectively covering the leakage range below the liquid inlet 141, ensuring that the liquid is accurately collected regardless of the angle from which it flows out. In terms of operation and maintenance, the liquid collection structure 600 can be detachable or pull-out, facilitating regular cleaning and maintenance by operators and preventing corrosion of the tank material by the coolant after long-term storage.

[0037] In this embodiment, the liquid cooler filling device is equipped with a liquid collection structure 600 to alleviate the problem of coolant overflow during the filling process. The liquid collection structure 600 can quickly catch the liquid when it overflows, preventing the coolant from dripping directly onto the equipment casing or the ground, and preventing equipment corrosion, short circuit hazards or environmental pollution caused by liquid residue.

[0038] Furthermore, to improve coolant utilization, in some optimized embodiments, a return pipe 700 is provided between the liquid collection structure 600 and the liquid storage container 500. One end of the return pipe 700 is connected to the bottom or lower side wall of the liquid collection structure 600, and the other end is connected to the top or upper side wall of the liquid storage container 500, forming a liquid return channel. The height of the liquid collection structure 600 is greater than the height of the liquid storage container 500. In this arrangement, after the coolant collects in the collection tank, it can flow back to the liquid storage container 500 by gravity, without the need for additional power assistance, forming a natural return mechanism.

[0039] At the connection of the return line 700, a sealing joint is typically used for fixation to prevent coolant leakage. The joint can be a threaded connection or a snap-fit ​​connection, and is equipped with a sealing gasket to ensure good sealing performance under high temperature, low temperature, or vibration environments. In addition, some embodiments also include a return pump 701 in the return line 700. When the coolant flow rate is too low or the liquid level difference is insufficient to drive gravity flow, the return pump 701 can actively draw coolant from the collection tank and deliver it back to the storage container 500.

[0040] In this embodiment, the coolant supply device for the liquid chiller can not only automatically collect overflowing coolant through the return pipe 700, but also achieve efficient liquid recovery through gravity return or active return pump 701. The design of the return pipe 700 allows the entire coolant recovery process to proceed without manual intervention, achieving gravity-fed recovery through liquid level difference without external power. Even when the coolant return speed is slow, the return pump 701 can still ensure timely coolant recovery, improving the system's fluid circulation efficiency.

[0041] In some optimized embodiments, the coolant filling device also includes an overflow sensor 800. The overflow sensor 800, as a monitoring component of the filling device, is electrically connected to the control unit 400 and can monitor the coolant overflow status in real time during the filling process, preventing the coolant from exceeding the receiving capacity of the collection structure 600.

[0042] The overflow sensor 800 is typically installed on the inner wall or upper part of the liquid collection structure 600. Its installation height is rationally configured based on the volume of the collection tank and the designed safe liquid level, usually located in the upper third of the collection structure 600, close to the upper limit of liquid storage. When coolant overflows into the collection tank during the filling process, and the liquid level gradually rises to the height of the sensor, the overflow sensor 800 can quickly detect the change in liquid level and transmit the overflow signal to the control unit 400. Upon receiving the overflow signal, the control unit 400 quickly determines whether the current filling operation is in an over-limit state. If it confirms that the coolant exceeds the safe range of the collection structure 600, it immediately issues a stop command, shuts down the water pump 200, and stops the coolant delivery operation.

[0043] Meanwhile, the control unit 400 can also provide alerts via audible and visual alarms, reminding operators to promptly check the coolant filling status and equipment operating condition to prevent equipment damage or environmental pollution caused by coolant overflow. In some optimized embodiments, the control unit 400 can also remotely transmit overflow alarm information to a management terminal or maintenance platform via an Internet of Things (IoT) module, enabling remote monitoring and maintenance of the equipment's operating status.

[0044] In this embodiment, by adding an overflow sensor 800, real-time monitoring and intelligent control of coolant overflow are achieved, effectively avoiding safety hazards caused by excessive injection during the filling process. The overflow sensor 800 can promptly trigger an alarm and control the water pump 200 to stop working when the coolant level approaches the upper limit of the collection tank, preventing the coolant from exceeding the acceptance range of the collection structure 600, causing coolant to overflow outside the equipment, contaminating the operating area, or causing a short circuit in the equipment. This greatly improves the automation level and safety assurance capability of the liquid cooler 140 filling system.

[0045] Furthermore, in order to prevent residual coolant in the delivery pipeline 100 from continuing to flow into the liquid chiller 140 after the water pump 200 stops working, causing excessive liquid addition or liquid overflow, in some optimized embodiments, the liquid chiller liquid addition device is also equipped with a termination valve 900.

[0046] The stop valve 900, as a shut-off component of the liquid filling device, is typically located at one end of the delivery pipeline 100 near the outlet 102. Its main function is to quickly close the delivery pipeline 100 after the liquid filling operation stops, preventing residual coolant from continuing to flow into the liquid cooler 140 due to gravity or pressure difference, thus completely terminating the liquid filling process. The stop valve 900 is electrically connected to the control unit 400, capable of receiving control signals and performing switching operations. To ensure response speed and control accuracy, the stop valve 900 is typically an electric ball valve, a solenoid valve, or a pneumatic shut-off valve.

[0047] During the coolant filling operation, when the water pump 200 is operating normally, the control unit 400 controls the stop valve 900 to be in the open state, allowing the coolant to flow smoothly in the delivery pipeline 100 and be injected into the liquid cooler 140 through the outlet 102. When the control unit 400 receives an alarm signal from the overflow sensor 800 or a stop command from the water pump 200, the stop valve 900 immediately switches to the closed state, isolating the outlet 102 from the pipeline and preventing the coolant from continuing to flow in. In this way, the flow of coolant can be instantly cut off after the water pump 200 stops, avoiding the risk of coolant overflowing from the liquid cooler 140 due to residual pressure in the pipeline.

[0048] In this embodiment, by adding a termination valve 900, this application effectively prevents the residual coolant in the delivery pipeline 100 from continuing to flow into the liquid cooler 140 after the water pump 200 stops working, achieving the effect of completely cutting off the coolant flow. Compared with traditional liquid filling devices, this embodiment can quickly close the termination valve 900 the moment the water pump 200 stops, achieving instantaneous cutoff of coolant delivery and avoiding continued liquid flow due to residual pressure in the pipeline, significantly improving the accuracy and safety of the liquid filling operation. In addition, the linkage control between the termination valve 900 and the control unit 400 enables the liquid filling process to have intelligent response capabilities. When overflow or abnormal liquid level is detected, the liquid filling operation can be quickly interrupted, reducing the potential harm of coolant overflow to equipment and the environment.

[0049] Please see Figure 4 , Figure 4This is a schematic diagram of another liquid cooler filling device provided in this application embodiment. In some optimized embodiments, in order to improve the stability of coolant flow and pressure control capability during the filling process, the liquid cooler filling device is also equipped with a pressure buffer tank 110. The pressure buffer tank 110 is installed in the delivery pipeline 100, specifically downstream of the water pump 200, that is, between the output end of the water pump 200 and the filling port 141 of the liquid cooler 140, and is designed to buffer and regulate the pressure fluctuations generated by the liquid delivered by the water pump 200, so as to achieve stable flow output and pipeline protection.

[0050] The pressure buffer tank 110, as a pressure regulating component in the liquid supply device, typically adopts a cylindrical or elliptical shape to enhance structural strength and optimize internal pressure distribution. An elastic buffer membrane 111 is installed inside the pressure buffer tank 110, dividing the interior into two independent chambers: a gas chamber 112 and a liquid chamber 113. The gas chamber 112, located on one side of the elastic buffer membrane 111, is filled with an inert gas (such as nitrogen or air) to provide compression space during pressure fluctuations. The liquid chamber 113, located on the other side of the buffer membrane, is directly connected to the delivery pipeline 100, becoming part of the pipeline, and contains the coolant supplied from the water pump 200.

[0051] During the liquid coolant filling operation of the liquid chiller 140, when the water pump 200 starts, the sudden pressurization of the water pump 200 causes a sharp increase in the coolant flow rate, which may cause a water hammer effect in the delivery pipeline 100, leading to severe vibration or excessive pressure in the pipeline, or even damage to the pipeline and the water pump 200. To address this, the pressure buffer tank 110 absorbs the sudden increase in fluid kinetic energy of the coolant through the deformation characteristics of the elastic buffer membrane 111, converting it into gas compression energy, thereby reducing the instantaneous pressure peak.

[0052] During normal operation of the water pump 200, the coolant is delivered at a steady flow, and the liquid chamber 113 and the gas chamber 112 maintain a dynamic balance, with the elastic buffer membrane 111 in a stable micro-vibration state. When the water pump 200 stops, the coolant flow rate in the pipeline drops sharply, and liquid backflow may cause a sudden drop in pressure. At this time, the pressurized gas in the gas chamber 112 pushes the coolant back through the elastic buffer membrane 111, preventing coolant backflow or negative pressure fluctuations in the pipeline due to instantaneous negative pressure.

[0053] Furthermore, in some optimized embodiments, the pressure buffer tank 110 is provided with an air vent 114. The air vent 114 is used to connect the air chamber 112 inside the pressure buffer tank 110 with the external environment when necessary, so as to regulate the internal pressure of the air chamber 112. The air vent 114 is usually located on the upper part or side wall of the pressure buffer tank 110, and an air valve 115 is installed on the air vent 114. In the non-operating state, the air valve 115 remains closed, and in the operating state, the air valve 115 can automatically open and close according to pressure changes.

[0054] In actual operation, when the liquid cooler 140 starts its liquid filling operation, the coolant enters the pressure buffer tank 110 under the drive of the water pump 200. The liquid chamber 113 inside the tank is compressed by pressure, and the elastic buffer membrane 111 in the air chamber 112 deforms accordingly, causing the pressure in the air chamber 112 to rise. If the pressure in the air chamber 112 exceeds the set value, the air valve 115 automatically opens to release some gas, reducing the pressure in the air chamber 112 and preventing tank deformation or diaphragm rupture. Conversely, when the coolant flow rate decreases or the water pump 200 stops, the pressure in the liquid chamber 113 decreases, and the air chamber 112 may experience negative pressure due to the rebound of the buffer membrane. At this time, the air valve 115 automatically opens to draw in external air, causing the pressure in the air chamber 112 to rise back to the normal level, preventing diaphragm adsorption or liquid backflow.

[0055] In this embodiment, when changes in coolant flow rate cause drastic pressure fluctuations within the buffer tank, the vent 114 and the air valve 115 can quickly release or replenish gas, ensuring stable pressure in the air chamber 112 and preventing diaphragm damage or coolant splashing due to pressure imbalance. Especially under conditions of frequent start-stop of the water pump 200 or significant flow rate changes, the air valve 115 promptly adjusts the gas flow, gradually stabilizing the coolant flow rate and effectively improving the safety and continuity of the coolant replenishment operation.

[0056] Considering the potential backflow problem during the coolant filling operation, some optimized embodiments incorporate a one-way valve 120 in the delivery pipeline 100 of the liquid coolant filling device. This effectively prevents coolant from flowing back into the delivery pipeline 100 due to pressure fluctuations or the shutdown of the water pump 200. The one-way valve 120 is located between the liquid chamber 113 and the water pump 200, specifically between the outlet of the water pump 200 and the inlet of the liquid chamber 113 of the pressure buffer tank 110. This ensures that the coolant can only flow in one direction during the filling process, from the water pump 200 to the liquid chamber 113, and will not flow back to the water pump 200 due to pressure changes. The one-way valve 120 can be a spring check valve, a ball check valve, or a butterfly check valve; the appropriate valve type can be selected based on different coolant flow and pressure characteristics.

[0057] In actual liquid filling operation, when the water pump 200 is running normally, the coolant enters the liquid chamber 113 of the pressure buffer tank 110 under the push of the water pump 200. The one-way valve 120 automatically opens under positive pressure to ensure that the liquid flows smoothly into the liquid chamber 113. When the water pump 200 stops working or the pressure suddenly drops, the one-way valve 120 can close quickly, relying on the spring return force or hydraulic differential to return the valve core to its position, forming a reliable liquid flow isolation to prevent liquid backflow.

[0058] In this embodiment, by setting a one-way valve 120 in the delivery pipeline 100, the one-way valve 120 can automatically close after the water pump 200 stops, effectively preventing the coolant from flowing back due to pressure changes, avoiding problems such as the water pump 200 being impacted by backflow or the water pump 200 reversing or the shaft seal failing due to backflow, thus achieving the technical effect of preventing coolant backflow and protecting the water pump 200.

[0059] In some optimized embodiments, the liquid cooler filling device is also equipped with a filter screen 130. The filter screen 130 is mainly used to intercept impurities and particulate matter during the coolant delivery process, preventing impurities from entering the filling port 141 or the interior of the liquid cooler 140 with the coolant, thereby ensuring the cleanliness of the coolant.

[0060] The filter screen 130 is installed in the delivery pipeline 100. Its specific location can be downstream of the water pump 200 or upstream of the coolant inlet 141, that is, in the pipeline section before the coolant reaches the coolant inlet 141 after being output from the water pump 200. It effectively filters particulate contaminants from the coolant during delivery. In terms of installation, the filter screen 130 can be detachably connected, typically via a flange connection or threaded interface, to the delivery pipeline 100 for easy cleaning or replacement.

[0061] Furthermore, the use of terms such as "first" and "second" in this application is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed in this application.

[0062] The above description is merely a preferred embodiment of this application and does not limit the patent scope of this application. Any equivalent structural transformations made based on the content of this application's specification and drawings under the concept of this application, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this application.

Claims

1. A liquid filling device for a liquid-cooled machine, characterized by comprising: The liquid chiller has a liquid inlet near its top, and the liquid chiller liquid filling device includes: A delivery pipeline is provided to extend to the liquid inlet and to deliver liquid from the liquid inlet to the liquid cooler. A water pump is installed in the delivery pipeline to provide driving force for delivering liquid in the delivery pipeline; A liquid level sensor is used to be installed inside the liquid chiller to detect the liquid level inside the liquid chiller; The control unit is connected to the liquid level sensor and the water pump respectively, and is used to start the water pump to deliver liquid to the liquid chiller when the liquid level detected by the liquid level sensor is lower than the preset liquid level.

2. The liquid filling device of claim 1, wherein The liquid cooler liquid filling device further includes a liquid storage container, and the delivery pipeline includes: The liquid inlet extends into and communicates with the liquid storage container, and is used to introduce the liquid in the liquid storage container into the delivery pipeline. The liquid outlet is connected to or faces the liquid inlet and is used to draw liquid from the delivery pipeline to the liquid inlet.

3. The liquid filling device of claim 2, wherein The liquid cooler liquid filling device includes a liquid collecting structure, which is located below the liquid filling port to collect the liquid overflowing from the liquid filling port.

4. The liquid filling device for a liquid-cooled chiller according to claim 3, wherein The height of the liquid collection structure is higher than the height of the liquid storage container, and the liquid cooler liquid filling device further includes: A return pipeline connects the liquid collection structure and the liquid storage container, and is used to recover the liquid collected by the liquid collection structure to the liquid storage container.

5. The liquid filling device for a liquid-cooled cryostat according to claim 3, wherein The liquid cooler liquid filling device also includes: An overflow sensor is connected to the control unit. The overflow sensor is installed at a predetermined position on the inner wall of the liquid collection structure. When the overflow sensor detects that the liquid in the liquid collection structure has reached the predetermined position, it sends an alarm signal to the control unit, thereby triggering the control unit to control the water pump to stop working.

6. The liquid filling device of claim 5, wherein The liquid cooler liquid filling device also includes: A stop valve is connected to the control unit. The stop valve is located at one end of the delivery pipeline near the liquid outlet. The stop valve is used to switch to the closed state when the control unit receives the alarm signal so that the liquid outlet stops delivering liquid to the liquid cooler.

7. The liquid filling device of claim 1, wherein The liquid cooler liquid filling device also includes: A pressure buffer tank is disposed in the delivery pipeline and located downstream of the water pump. The pressure buffer tank includes an elastic buffer membrane that divides the interior of the pressure buffer tank into an air chamber and a liquid chamber, and the liquid chamber is connected in series in the delivery pipeline.

8. The liquid cooler filling device according to claim 7, characterized in that, The pressure buffer tank has an air vent that connects the air chamber to the external environment. The air vent is equipped with a valve to control the connection between the air chamber and the external environment.

9. The liquid cooler filling device according to claim 7, characterized in that, A one-way valve is installed in the delivery pipeline, and the one-way valve is located between the liquid chamber and the water pump to ensure that liquid is allowed to flow from the water pump to the liquid chamber only.

10. The liquid cooler filling device according to any one of claims 1 to 9, characterized in that, The liquid cooler filling device also includes a filter screen, which is installed in the delivery pipeline to prevent impurities from entering the filling port.

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