TWI823413B - Immersion cooling system and level control method thereof - Google Patents

Abstract

An immersion cooling system and level control method thereof, comprising: provide a main tank and a storage tank connected through first and second pipelines, the main tank has a first upper/lower level limit, and the liquid storage tank has a second upper/lower level limit, valves are configured at the pipelines, a pump is configured at the first pipeline, and the connection portion between the second pipeline and the main tank is higher than the connection portion between the first pipeline and the main tank and the first upper level limit; measure the liquid level of the above two tanks with level meter; the processing control unit execute: when it is determined that the level of the main tank is lower than the first lower level limit and the level of the storage tank is higher than the second lower level limit, open the first valve and the pump so that the liquid is input into the main tank; and when it is determined that the level of the main tank is higher than the first upper level limit and the level of the storage tank is not higher than the second upper level limit, open the second valve to allow liquid to enter the storage tank.

Description

Immersion cooling system and liquid level control method

The present invention relates to a liquid level control method, in particular to a liquid level control method designed for an immersion cooling system.

Immersion cooling systems can usually be divided into single-phase and two-phase immersion cooling systems. The former mainly relies on thermal convection to generate circulation, while the latter uses low-boiling point coolant to carry away heat energy during phase change. A two-phase immersion cooling system has a tank containing dielectric fluid in which the components to be cooled are immersed. In order to prevent the dielectric liquid from overflowing the tank due to excessive liquid level, the components to be cooled are generally placed into the tank first, and then the dielectric liquid is injected to a preset liquid level.

In the current design, when the liquid level in the tank drops below the set value due to evaporation or overflow, the system will activate the safety mechanism and shut down the server in the tank to prevent some components from failing due to the liquid level being too low. Immersed in liquid and cooled, causing overheating or even damage. At the same time, the system will issue a warning, requiring the operator to replenish the liquid. The server can only be restarted after the liquid level returns to the set range, resulting in an increase in system downtime.

In addition, when removing the server from the tank, if the tank volume is small, a single machine takes up a high volume, or multiple servers are taken out at the same time, the volume originally occupied by the machine in the dielectric fluid will be significantly drops, causing the liquid level to drop, and may also trigger the safety mechanism to shut down the remaining servers in the tank. In order to avoid this situation, additional dielectric fluid can be injected into the tank first so that The liquid level in the tank is maintained within the set range, but when putting it back into the server, the excess dielectric fluid needs to be taken out to avoid excessive liquid in the tank and increasing the possibility of the liquid overflowing the tank. In addition, in a two-phase system, an excessively high liquid level may cause the dielectric liquid to be in direct contact with the condenser, and the heat transfer phenomenon will be converted to single-phase cooling without phase change, reducing the condenser efficiency. The above-mentioned complicated operation process of injecting additional liquid before taking out the machine and removing the excess liquid after putting it back not only burdens the operator, but also easily causes accidents of liquid leakage during the operation, further aggravating the situation. Liquid leakage.

In view of the above, the present invention provides an immersion cooling system and a liquid level control method thereof.

An immersion cooling system according to an embodiment of the present invention includes a main tank body, a liquid storage tank, a set of first liquid level gauges, a set of second liquid level gauges and a processing control unit, wherein the liquid storage tank passes through the third liquid level gauge. The first pipeline and the second pipeline are connected to the main tank body. The main tank body has a first lower limit of liquid level and a first upper limit of liquid level, and is used to accommodate an electronic component to be cooled. The liquid storage tank has a second lower liquid level limit and a second upper liquid level limit. The first pipeline is provided with a first valve and a pump. The second pipeline is provided with a second valve, and the connection between the second pipeline and the main tank is higher than the connection between the second pipeline and the liquid storage tank. The first liquid level gauge is arranged in the main tank body and is used for measuring the liquid level of the main tank body. The second liquid level gauge is disposed in the liquid storage tank and used to measure the liquid level of the liquid storage tank. The processing control unit is connected to the first valve, the second valve, the pump, the first liquid level gauge and the second liquid level gauge, and is used to execute: when it is determined that the liquid level of the main tank is lower than the first liquid level lower limit and the storage When the liquid level of the liquid tank is higher than the second lower limit of the liquid level, the first valve and the pump are opened so that the liquid is input from the liquid storage tank into the main tank through the first pipeline, and when the liquid level of the main tank is judged is higher than the first liquid level upper limit and When the liquid level of the liquid storage tank is not higher than the second upper limit of the liquid level, the second valve is opened so that the liquid is input from the main tank body into the liquid storage tank through the second pipeline.

According to an embodiment of the present invention, a liquid level control method of an immersion cooling system includes: providing a main tank body and a liquid storage tank, wherein the main tank body has a first lower liquid level limit and a first upper liquid level limit, and the storage tank The liquid tank has a second lower limit of liquid level and a second upper limit of liquid level. The main tank body and the liquid storage tank are connected through a first pipeline and a second pipeline. The first pipeline is provided with a first valve and a Pump, the second pipeline is provided with a second valve, and the connection between the second pipeline and the main tank is higher than the connection between the second pipeline and the liquid storage tank and is lower than or equal to the first liquid level upper limit; with A set of first liquid level meters measure the liquid level of the main tank; a set of second liquid level meters measure the liquid level of the liquid storage tank; and a processing control unit executes: when judging that the liquid level of the main tank is low When the first lower limit of the liquid level and the liquid level of the liquid storage tank is higher than the second lower limit of the liquid level, open the first valve and the pump so that the liquid is input from the liquid storage tank into the main tank through the first pipeline; and when When it is judged that the liquid level of the main tank is higher than the first upper limit of liquid level and the liquid level of the liquid storage tank is not higher than the second upper limit of liquid level, the second valve is opened so that the liquid is input from the main tank to the storage tank through the second pipeline. in the liquid tank.

With the above structure, the immersion cooling system and its liquid level control method disclosed in this case provide the structure of a liquid storage tank connected to the main tank body and pipelines, with the functions of a liquid level gauge, a pump and a processing control unit, and Based on the liquid level requirements of the main tank and the comprehensive liquid level condition in the liquid storage tank, judgments can be made to prevent the liquid level in the liquid storage tank from being too low, resulting in the inability to be input to the main tank, and the liquid level in the liquid storage tank being too high, causing the liquid to be When it is impossible to input the liquid into the liquid storage tank, input the liquid from the main tank into the liquid storage tank, or input the liquid from the liquid storage tank into the main tank. This can ensure that the main tank has an appropriate amount of coolant and avoid system failure due to liquid cooling. Bit changes increase downtime and simplify cooling operations. Furthermore, the connection point between the second pipeline and the main tank is higher than the second Due to the design of the connection between the pipeline and the liquid storage tank, the system and method in this case can perform the reflux action by gravity without consuming additional energy.

The above description of the present disclosure and the following description of the embodiments are used to demonstrate and explain the spirit and principles of the present invention, and to provide further explanation of the patent application scope of the present invention.

T1: Main tank

T2: Liquid reservoir

L1: first level gauge

L2: first level gauge

L3: Second level gauge

L4: Second level gauge

l1: lower limit of first liquid level

l2: upper limit of first liquid level

l3: second liquid level lower limit

l4: Second liquid level upper limit

V1: first valve

V2: Second valve

C1: First pipeline

C2: Second pipeline

P1:Pump

S201~S211, S301~S307, S401~S407, S501~S506: steps

FIG. 1 is a schematic diagram of an immersion cooling system according to an embodiment of the present invention.

FIG. 2 is a block flow diagram illustrating a liquid level control method of an immersion cooling system according to an embodiment of the present invention.

FIG. 3 is a block flow diagram of a liquid level control method of an immersion cooling system according to another embodiment of the present invention.

FIG. 4 is a block flow diagram of a liquid level control method of an immersion cooling system according to yet another embodiment of the present invention.

FIG. 5 is a block flow diagram of a liquid level control method of an immersion cooling system according to another embodiment of the present invention.

FIG. 6 is a schematic three-dimensional structural diagram of an immersion cooling system according to another embodiment of the present invention.

The detailed features and advantages of the present invention are described in detail below in the implementation mode. The content is sufficient to enable anyone skilled in the relevant art to understand the technical content of the present invention and implement it according to the content disclosed in this specification, the patent scope and the drawings. , any familiar phase Those skilled in the art can easily understand the related objects and advantages of the present invention. The following examples further illustrate the aspects of the present invention in detail, but do not limit the scope of the present invention in any way.

Please refer to FIG. 1 , which is a schematic diagram of an immersion cooling system according to an embodiment of the present invention. As shown in Figure 1, the immersion cooling system 1 includes a main tank T1, a liquid storage tank T2, a set of first liquid level gauges L1 and L2, a set of second liquid level gauges L3 and L4, and a processing control unit U1. The tank body T1 and the liquid storage tank T2 are connected through the first pipeline C1 and the second pipeline C2. The main tank body T1 has a first lower liquid level limit l1 and a first upper liquid level limit l2, and the liquid storage tank T2 has a second lower liquid level limit l3 and a second upper liquid level limit l4. A set of first liquid level gauges L1 and L2 are provided in the main tank T1 and are used to accommodate electronic components to be cooled (such as servers). A set of second liquid level gauges L3 and L4 are provided in the liquid storage tank T2. The first tube The pipeline C1 is provided with a first valve V1 and a pump P1, and the second pipeline C2 is provided with a second valve V2. The connection between the above-mentioned second pipeline C2 and the main tank T1 is higher than the connection between the second pipeline C2 and the liquid storage. The connection point of the tank T2 is lower than or equal to the first liquid level upper limit l2, and the above-mentioned first to fourth liquid level gauges L1 to L4, the first and second valves V1 and V2, and the pump P1 are all connected to a processing control unit U1 has a signal link.

The processing control unit U1 is, for example, a microcontroller, a programmable logic controller, or other devices with signal processing and control functions, or an integration of multiple above-mentioned devices. The values of the first liquid level lower limit l1, the first liquid level upper limit l2, the second liquid level lower limit l3 and the second liquid level upper limit l4 can be pre-stored, and the first liquid level gauges L1 and L2 can be used to obtain the data in the main tank T1 The relationship between the liquid level of the coolant, the first lower limit of the liquid level l1 and the upper limit of the first liquid level l2, using the second liquid level gauges L3 and L4 to obtain the liquid level of the coolant in the reservoir T2 and the second lower limit of the liquid level. The relationship between l3 and the second liquid level upper limit l4, and based on the above relationship, the first and second valves V1 and V2 and the pump P1 are controlled. The specific control method will be described later. In addition, the processing control unit U1 has The above-mentioned monitoring of the liquid level of the main tank T1 can also additionally monitor the liquid level of the liquid storage tank T2. The specific control method will be described later.

Furthermore, the first lower liquid level l1 of the main tank T1 can be set to the lowest liquid level at which all the electronic components to be cooled in the main tank T1 are still immersed in the liquid; the first upper liquid level l2 of the main tank T1 is located at The position is higher than the first lower limit l1 of the liquid level, and can be set lower than the upper opening of the main tank T1, thereby preventing the liquid from accidentally overflowing; the upper limit l4 of the second liquid level of the liquid storage tank T2 is located higher than the second liquid level. It is located at the lower limit l3, and can be set lower than the upper opening of the liquid reservoir, thereby preventing the liquid from overflowing. Furthermore, the second lower liquid level limit l3 of the liquid storage tank T2 can be set higher than the connection between the liquid storage tank T2 and the first pipeline C1, thereby preventing the pump P1 from inhaling air. In addition, in the two-phase system, the first liquid level upper limit l2 of the main tank T1 can be set lower than a condenser (not shown) provided in the main tank T1, thereby preventing the liquid in the tank from directly contacting the condenser. device contact.

It should be noted here that FIG. 1 exemplarily shows that the first liquid level gauges L1 and L2 include two liquid level gauges respectively set at the first liquid level upper limit l2 and the first liquid level lower limit l1, and the second liquid level gauge The liquid level gauges L3 and L4 also include two liquid level gauges respectively set at the second upper liquid level limit l4 and the second lower liquid level limit l3. However, the present invention does not limit the number and installation location of the liquid level gauges, such as the main tank T1 and Each of the liquid storage tanks T2 can be equipped with a single optical sensing liquid level gauge that is sufficient to determine the liquid level, or the immersion cooling system 1 can be provided with a liquid level gauge that can determine the liquid level of the main tank T1 and the liquid storage tank T2. Therefore, Figure 1 is only an example here.

Please refer to FIGS. 1 and 2 together. FIG. 2 is a block flow chart of a liquid level control method of an immersion cooling system according to an embodiment of the present invention. The liquid level control method includes providing the immersion cooling system 1 as described in the above embodiments and using the immersion cooling system 1 to perform steps S201 to S211 shown in FIG. 2 . The following is an example of the immersion cooling shown in Figure 1 The operation of System 1 is used to illustrate each step. In step S201, the first liquid level gauges L1 and L2 measure the liquid level of the main tank T1. It should be noted in particular that the liquid level measurement in many embodiments of this case is mainly for measuring the height of the liquid. However, measuring the volume or volume of the liquid is also an alternative that does not deviate from the spirit of this case. The detailed measurement method is as follows What is generally understandable to those with knowledge will not be described in detail here. In addition, the liquid level measured in step S201 also has many expression methods, such as measurement records in centimeters. However, essentially, the judgment processing control unit U1 can also simply classify the liquid level of the main tank as The three liquid level states are: lower than the first lower liquid level limit l1, lower than the first upper liquid level limit l2 but higher than the first lower liquid level limit l1, or higher than the first upper liquid level limit l2. Therefore, the measurement referred to in step S201 can be any measurement that can satisfy all the following steps. To be more precise, as long as it can provide enough information to the processing control unit U1 to judge the liquid level condition, there is no other form of measurement. restrictions.

Similar to step S201, in step S202, the second liquid level gauges L3 and L4 will measure the liquid level of the liquid storage tank T2, and at least allow the processing control unit U1 to determine whether the liquid level in the liquid storage tank T2 is low. At the second lower liquid level limit l3, lower than the second upper liquid level limit l4 but higher than the second lower liquid level limit l3 or higher than the second upper liquid level limit l4. It is worth noting that step S202 does not have to be executed after step S201. The execution order between step S201 and step S202 can be sequential or parallel, which will not affect the subsequent judgment of the liquid level control method in this case. In addition, step S202 may also be executed between step S203 and step S204 described later or between step S207 and step S209.

In step S203, after receiving the liquid level information of the main tank T1, the processing control unit U1 determines whether the liquid level of the main tank T1 is lower than the first lower liquid level limit l1. When the processing control unit U1 determines in step S203 that the liquid level of the main tank T1 is lower than the first lower liquid level limit l1, it means that the components to be cooled in the main tank T1 cannot be fully immersed under the cooling liquid surface, and there will be a risk of overheating. . catch In step 204, the processing control unit U1 obtains the liquid level information of the liquid storage tank T2 and determines whether the liquid level of the liquid storage tank T2 is lower than the second liquid level lower limit l3. When it is determined that the liquid level of the liquid storage tank T2 is not lower than the second lower liquid level limit l3, it means that there is still room for the coolant in the liquid storage tank T2 to be used by the main tank body T1, so step S205 is entered, and the process control The unit U1 opens the first valve V1 and the pump P1, so that the liquid is input from the liquid storage tank T2 into the main tank T1 through the first pipeline C1.

When it is determined that the liquid level of the main tank T1 is lower than the first lower liquid level limit l1 and the liquid level of the liquid storage tank T2 is lower than the second lower liquid level limit l3, the processing control unit U1 will enter step S206: no action, that is, maintain The first valve V1 and the pump P1 are not opened as they are, thereby avoiding the risk of rashly entering step S205 and causing the pump P1 to empty. Or when it is determined that the liquid level of the main tank T1 is lower than the first lower liquid level limit l1 and the liquid level of the liquid storage tank T2 is lower than the second lower liquid level limit l3, the processing control unit U1 in addition to maintaining the first valve V1 and the pump In addition to being in a closed state, P1 also stops the operation of the electronic components to be cooled placed in the main tank T1 and outputs a first warning signal, thereby preventing the electronic components to be cooled from overheating and informing the operator that the electronic components to be cooled need to be cooled in the liquid storage tank T2 Add coolant inside.

The above is a description of the situation in which the main tank T1 needs to be replenished with coolant in step S203. If the liquid level of the main tank T1 is not lower than the first lower liquid level limit l1, then step S207 is entered to determine whether the liquid level of the main tank T1 is higher than the first upper liquid level limit l2. If the liquid level of the main tank T1 is not higher than the first liquid level upper limit l2, it means that the liquid level of the main tank T1 is within a safe range, and therefore the processing control unit U1 will not take any other action as shown in step S208.

However, in step S207, when the liquid level of the main tank T1 is too high, the processing control unit U1 will execute step S209 to determine whether the liquid level of the liquid storage tank T2 is higher than the second upper liquid level l4. Whether the liquid storage tank T2 can accept excess liquid in the main tank T1. if If there is still room in the liquid storage tank T2, step S210 is entered. That is to say, when the processing control unit U1 determines that the liquid level of the main tank T1 is higher than the first upper liquid level l2 and the liquid level of the liquid storage tank T2 is not higher than the second upper liquid level l4, it opens the second valve V2, So that the liquid is input from the main tank body T1 into the liquid storage tank T2 through the second pipeline C2, and because the second pipeline C2 has a height as shown in Figure 1 at the connection between the main tank body T1 and the liquid storage tank T2 The difference makes it unnecessary to rely on a pump to complete the liquid transportation in step S210. In step S209, when it is determined that the liquid level of the main tank T1 is higher than the first upper liquid level l2 and the liquid level of the liquid storage tank T2 is higher than the second upper liquid level l4, the processing control unit U1 will enter step S211: Not actuating, that is, maintaining the original status without opening the second valve V2, thereby avoiding the risk of rashly entering step S210 and causing the liquid level of the liquid storage tank T2 to be too high. Or, when it is determined that the liquid level of the main tank T2 is higher than the first upper liquid level l2 and the liquid level of the liquid storage tank T2 is higher than the second upper liquid level l4, the processing control unit U1 maintains the second valve V2 in a closed state. In addition, a second warning signal is output, thereby informing the operator that the coolant in the reservoir T2 needs to be properly drained.

Furthermore, after confirming that the liquid level of the main tank T1 is within a safe range for a period of time, the processing control unit U1 can obtain the liquid level of the main tank T1 and the second liquid level gauges L3 and L2 from the first liquid level gauges L1 and L2 again. L4 obtains the liquid level of the liquid storage tank T2 to perform the above step S203 and subsequent judgments or actions.

Please refer to FIG. 3 , which is a block flow chart of a liquid level control method of an immersion cooling system according to another embodiment of the present invention. The embodiment shown in Fig. 3 also includes the main steps S201~S211 shown in Fig. 2, the operation of which is the same as that of the previous embodiment, and will not be described again here. In this example, when the liquid level of the main tank T1 is lower than the first lower liquid level limit l1 and the liquid level of the liquid storage tank T2 is not lower than the second lower liquid level limit l3, the first valve V1 and the pump P1 will S205 is turned on, then Then enter step S301, the processing control unit U1 opens the first valve V1 and pump P1 and waits for a preset time before executing a confirmation process, enters steps S302 and S303, and controls the first liquid level gauge L1 and L2 to measure the main tank. The updated liquid level of the body T1, and the second liquid level gauges L3 and L4 are controlled to measure the updated liquid level of the liquid storage tank T2. Steps S302 and S303 can also be exchanged in order or processed in parallel, or step S303 can be executed in step S304 described later. and S306.

In step S304 of this example, when it is determined that the updated liquid level of the main tank T1 is not lower than the first lower liquid level limit l1, it means that the previous liquid storage tank T2 has input enough liquid to the main tank T1, and the processing control unit U1 The first valve V1 and pump P1 will be closed, which is step S305; however, when it is judged that the updated liquid level of the main tank T1 is still lower than the first lower limit l1 of the liquid level, it means that the previous input of the liquid storage tank T2 to the main tank T1 If the liquid amount is not enough, the processing control unit U1 further determines in step S306 whether the updated liquid level of the liquid storage tank T2 is lower than the second liquid level lower limit l3. When the processing control unit U1 determines that the updated liquid level of the main tank T1 is lower than the first lower liquid level limit l1 and the updated liquid level of the liquid storage tank is not lower than the second lower liquid level limit l3, it waits for the above predetermined time and then executes step S301 again. , and keep pump P1 and first valve V1 open. However, in step S306, when the processing control unit U1 determines that the updated liquid level of the main tank T1 is lower than the first lower liquid level limit l1 and the updated liquid level of the liquid storage tank T2 is lower than the second lower liquid level limit l3, then the third liquid level is closed. A valve V1 and a pump P1 stop the operation of the electronic components to be cooled in the main tank T1 and output the first warning signal, which is step S307.

Please refer to FIG. 4 , which is a block flow diagram of a liquid level control method of an immersion cooling system according to yet another embodiment of the present invention. The embodiment shown in Fig. 4 also includes the main steps S201~S211 shown in Fig. 2, whose operations are the same as those in the previous embodiment and will not be described again here. In this example, when the liquid level of the main tank T1 is higher than the first upper liquid level l2 and the liquid level of the liquid storage tank T2 is not Higher than the second liquid level upper limit l4, the second valve V2 will be opened in step S210, and then enter step S401. The processing control unit U1 opens the second valve V2 and waits for a preset time before executing a confirmation process, and then enters step S401. S402 and S403, control the first liquid level gauges L1 and L2 to measure an updated liquid level of the main tank T1, and control the second liquid level gauges L3 and L4 to measure an updated liquid level of the liquid storage tank T2, wherein step S402 and S403 can also be exchanged in order or processed in parallel, or step S403 can be executed between steps S404 and S406 described later.

In step S404 of this example, when it is determined that the updated liquid level of the main tank T1 is not higher than the first upper liquid level l2, it means that the previous input of liquid by the main tank T1 to the liquid storage tank T2 is enough, and the processing control unit U1 The second valve V2 will be closed, which is step S405; however, when it is judged that the updated liquid level of the main tank T1 is still higher than the first liquid level upper limit l2, it means that the amount of liquid previously input by the main tank T1 to the liquid storage tank T2 is not enough. , the processing control unit U1 further determines in step S406 whether the updated liquid level of the liquid storage tank T2 is higher than the second liquid level upper limit l4. When the processing control unit U1 determines that the updated liquid level of the main tank T1 is higher than the first upper liquid level l2 and the updated liquid level of the liquid storage tank T2 is not higher than the second upper liquid level l4, it waits for the above predetermined time and performs the steps again. S401, and keep the second valve V2 open. However, in step S406, when the processing control unit U1 determines that the updated liquid level of the main tank T1 is higher than the first upper liquid level l2 and the updated liquid level of the liquid storage tank T2 is higher than the second upper liquid level l4, it closes the third The second valve V2 also outputs the second warning signal, which is step S307.

The immersion cooling system and its liquid level control method in the above embodiments can produce liquid level adjustment and buffering effects on the main tank T1 through the liquid storage tank T2, reducing the need for manual labor. In addition, manual adjustment of the liquid level is mainly required. , comes from the first warning signal mentioned above With the second warning signal, and when adjusting the liquid level in the liquid storage tank T2, it can also reduce interference to the electronic components in the main tank T1.

Another embodiment of this case proposes a method for additionally monitoring the liquid level of the liquid storage tank T2. Please refer to FIG. 5. FIG. 5 is a schematic diagram of a liquid level control method of an immersion cooling system according to another embodiment of the present invention. Step S501 is the same as S201, which is to measure the liquid level of the main tank T1. Different from the previous embodiment, in step S502, when the processing control unit U1 determines that the liquid level of the liquid storage tank T2 is lower than the second liquid level lower limit l3, it proceeds to step S503 and outputs a third warning signal. When the processing control unit U1 determines that the liquid level of the liquid storage tank T2 is not lower than the second lower liquid level limit l3, it proceeds to step S504 to determine whether the liquid level is higher than the second upper liquid level limit l4. When the liquid level of the liquid storage tank T2 is not higher than the second liquid level upper limit l4, it means that the liquid level of the liquid storage tank T2 is normal and no action is performed, that is, step S506. When it is determined that the liquid level of the liquid storage tank T2 is higher than the second liquid level upper limit l4, a fourth warning signal is output.

It should be noted that this embodiment also has the above-mentioned steps S201 to S211, and adds steps S501 to S506. The advantageous effect brought by this embodiment is that when the first warning signal or the second warning signal occurs, the main tank T1 is already in an abnormal liquid level condition. However, when the third warning signal in this example or When the fourth warning signal occurs, the main tank T1 may still have a normal liquid level. That is, the liquid level control method of this embodiment can additionally measure and determine the liquid level of the liquid storage tank T2, and can effectively reduce the risk to the main tank T1. Possible influence of electronic components in tank T1.

Please refer to FIG. 6 , which is a schematic three-dimensional structural diagram of an immersion cooling system according to another embodiment of the present invention. What this embodiment particularly wants to point out through FIG. 6 is that there is no need to have a one-to-one correspondence between the liquid storage tank T2 and the main tank body T1. In this embodiment, the main There are multiple tanks T1, and the processing control unit U1 can, according to the mechanism of the aforementioned embodiment, perform liquid deployment when it is determined that the liquid level of any main tank T1 is not within a safe range, and is further used to determine whether the liquid level of the tank T1 is within a safe range. When the liquid level of the liquid tank T2 is lower than the second lower liquid level limit l3 or the liquid level of the liquid storage tank T2 is higher than the second upper liquid level limit l4, a warning signal is output. The above control structure in which multiple main tanks T1 are connected to the liquid storage tank T2 through pipelines C1 and C2 is a highly efficient approach, and when combined with the liquid level control methods of the corresponding embodiments in Figures 3 and 4, the processing control unit U1 It is also possible to re-measure the liquid levels of the main tank T1 and the liquid storage tank T2 at a predetermined time after the warning signal sounds. The reason is that when the liquid level in the liquid storage tank T2 is too low or too high, even if the operator has not yet With additional adjustments, multiple other main tanks T1 may also exchange liquids with the liquid storage tank T2 to achieve possible system self-regulation. In addition, the functions of the pump P1, the first valve V1 and the second valve V2 in this figure are the same as those mentioned above, so they will not be described again here.

With the above structure, the liquid level control method for the immersion cooling system disclosed in this case provides the structure of the liquid storage tank connected to the main tank body and the pipeline, combined with the functions of the liquid level gauge, pump and processing control unit, and It can be judged based on the liquid level measurement of the main tank and the liquid storage tank, and the opening of the valve and pump can be further controlled to prevent the liquid level in the liquid storage tank from being too low and preventing the liquid from being input to the main tank. If the level is too high and the liquid cannot be fed into the reservoir, feed the liquid from the main tank into the reservoir, or feed the liquid from the reservoir into the main tank to ensure that the main tank has an appropriate amount of coolant. , Avoid the increase in system downtime due to liquid level changes and simplify the cooling operation process. Furthermore, through the design that the connection point between the second pipeline and the main tank body is higher than the connection point between the second pipeline and the liquid storage tank, the gravity effect of the height difference can be used to reduce the energy loss required to return the liquid, which helps To efficiently maintain the operation of the immersion cooling system and reduce labor costs and interruption time.

In an embodiment of the present invention, the immersion cooling system and its liquid level control method of the present invention can be applied to a server. The server can be used for artificial intelligence (Artificial Intelligence, AI for short) computing and edge computing (Edge computing). Computing), it can also be used as a 5G server, cloud server or Internet of Vehicles server.

Although the present invention is disclosed in the foregoing embodiments, they are not intended to limit the present invention. All changes and modifications made without departing from the spirit and scope of the present invention shall fall within the scope of patent protection of the present invention. Regarding the protection scope defined by the present invention, please refer to the attached patent application scope.

S201~S211: steps

Claims (10)

A liquid level control method for an immersion cooling system, including: Provide a main tank body and a liquid storage tank, wherein the main tank body has a first lower liquid level limit and a first upper liquid level limit, and the liquid storage tank has a second lower liquid level limit and a second upper liquid level limit, The main tank body and the liquid storage tank are connected through a first pipeline and a second pipeline, the first pipeline is provided with a first valve and a pump, the second pipeline is provided with a second valve, and The connection point between the second pipeline and the main tank body is higher than the connection point between the second pipeline and the liquid storage tank and is lower than or equal to the first liquid level upper limit; Use a set of first liquid level gauges to measure the liquid level of the main tank; measuring the liquid level of the liquid reservoir with a set of second liquid level gauges; and Executed with a processing control unit: When it is determined that the liquid level of the main tank is lower than the first lower limit of liquid level and the liquid level of the liquid storage tank is higher than the second lower limit of liquid level, the first valve and the pump are opened so that the liquid Input from the liquid storage tank into the main tank through the first pipeline; and When it is determined that the liquid level of the main tank is higher than the first liquid level upper limit and the liquid level of the liquid storage tank is not higher than the second liquid level upper limit, the second valve is opened to allow liquid to pass through the third liquid level upper limit. Two pipelines are input from the main tank body into the liquid storage tank. The liquid level control method of the immersion cooling system as described in claim 1 further includes using the processing control unit to perform: When it is determined that the liquid level of the main tank is lower than the first lower limit of liquid level and the liquid level of the liquid storage tank is lower than the second lower limit of liquid level, the cooling of the electronic components to be cooled placed in the main tank is stopped. operate and output a first warning signal; and When it is determined that the liquid level of the main tank is higher than the first upper limit of liquid level and the liquid level of the liquid storage tank is higher than the second upper limit of liquid level, a second warning signal is output. The liquid level control method of the immersion cooling system as described in claim 1 further includes using the processing control unit to execute a confirmation procedure after opening the first valve and the pump and waiting for a predetermined time, wherein the confirmation procedure includes : Control the first liquid level meter of the group to measure the updated liquid level of the main tank; Control the second liquid level meter of the group to measure the updated liquid level of the liquid storage tank; When it is determined that the updated liquid level of the main tank is not lower than the first liquid level lower limit, close the first valve and the pump; When it is determined that the updated liquid level of the main tank is lower than the first lower limit of liquid level and the updated liquid level of the liquid storage tank is lower than the second lower limit of liquid level, the first valve and the pump are closed and stopped. The operation of the electronic components to be cooled placed in the main tank and outputting a first warning signal; and When it is determined that the updated liquid level of the main tank is lower than the first lower liquid level limit and the updated liquid level of the liquid storage tank is not lower than the second lower liquid level limit, wait for the predetermined time and then execute the confirmation procedure again. . The liquid level control method of the immersion cooling system as described in claim 1 further includes using the processing control unit to execute a confirmation procedure after opening the second valve and waiting for a predetermined time, wherein the confirmation procedure includes: Control the first liquid level meter of the group to measure the updated liquid level of the main tank; Control the second liquid level meter of the group to measure the updated liquid level of the liquid storage tank; When it is determined that the updated liquid level of the main tank is not higher than the first liquid level upper limit, close the second valve; When it is determined that the updated liquid level of the main tank is higher than the first liquid level upper limit and the updated liquid level of the liquid storage tank is higher than the second liquid level upper limit, the second valve is closed and a second warning is output. signal; and When it is determined that the updated liquid level of the main tank is higher than the first liquid level upper limit and the updated liquid level of the liquid storage tank is not higher than the second liquid level upper limit, wait for the predetermined time and then execute the confirmation procedure again. . The liquid level control method of the immersion cooling system as described in claim 1 further includes using the processing control unit to perform: When it is determined that the liquid level of the liquid storage tank is lower than the second lower liquid level limit, a third warning signal is output; and When it is determined that the liquid level of the liquid storage tank is higher than the second upper liquid level limit, a fourth warning signal is output. An immersion cooling system containing: A main tank body has a first lower liquid level limit and a first upper liquid level limit, and is used to accommodate an electronic component to be cooled; A liquid storage tank has a second lower liquid level limit and a second upper liquid level limit, and is connected to the main tank body through a first pipeline and a second pipeline, wherein the first pipeline is provided with a first valve and a pump, the second pipeline is provided with a second valve, and the connection point between the second pipeline and the main tank is higher than the connection point between the second pipeline and the liquid storage tank and is lower than or equal to The upper limit of the first liquid level; A set of first liquid level gauges, installed in the main tank body, are used to measure the liquid level of the main tank body; a set of second liquid level gauges, arranged in the liquid storage tank, for measuring the liquid level of the liquid storage tank; A processing control unit connected to the first valve, the second valve, the pump, the set of first level gauges and the set of second level gauges, and used to perform: When it is determined that the liquid level of the main tank is lower than the first lower limit of liquid level and the liquid level of the liquid storage tank is higher than the second lower limit of liquid level, the first valve and the pump are opened so that the liquid Input from the liquid storage tank into the main tank through the first pipeline; and When it is determined that the liquid level of the main tank is higher than the first liquid level upper limit and the liquid level of the liquid storage tank is not higher than the second liquid level upper limit, the second valve is opened to allow liquid to pass through the third liquid level upper limit. The second pipeline is fed into the liquid storage tank from the main tank body. The immersion cooling system of claim 6, wherein the first liquid level gauge group includes two liquid level gauges respectively set at the first liquid level upper limit and the first liquid level lower limit, and the second liquid level gauge group The gauge includes two liquid level gauges respectively set at the second upper liquid level limit and the second lower liquid level limit. The immersion cooling system of claim 6, wherein the second lower liquid level limit is higher than the connection between the liquid storage tank and the first pipeline. The immersion cooling system of claim 6, wherein the upper limit of the first liquid level is lower than a condenser disposed in the main tank. The immersion cooling system of claim 6, wherein the number of the main tanks is multiple, and the processing control unit is further used to determine that the liquid level of the liquid storage tank is lower than the second liquid level lower limit or When the liquid level of the liquid storage tank is higher than the second upper limit of liquid level, a warning signal is output.

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