cooling system

Abstract

The present invention relates to a cooling system comprising a flow path, a desiccant cooler, a cold accumulator and a valve assembly. When the cooling system is in a first mode, the coolant is cooled by the desiccant cooler and is discharged through an outlet to cool a load. The first mode is operable at different cooling demands, preferably, the first mode is used to cool a load with a lower cooling demand. When the cooling system is in a second mode, the coolant is cooled by the desiccant cooler and is discharged from the desiccant cooler into the cold accumulator to press out the liquid with lower temperature in the cold accumulator, so that the coolant discharged from the outlet reaches a lower temperature level to cool the load. The second mode is operable at different cooling demands, preferably, the second mode is used to cool a load with a medium to high cooling demand. By controlling the cooling system in different modes, the cooling system is adapted to different cooling demands, and the energy waste caused by high cooling level when the cooling demand is low is reduced.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of cooling technology, in particular to a cooling system. BACKGROUND

[0002] With the rapid development of industry technologies such as cloud computing, Internet of Things, big data and artificial intelligence, the demand for timely and efficient processing of massive data is increasing. As the most basic infrastructure for data processing and processing, the importance of data centers is self-evident. In order to ensure the safe and reliable operation of data centers, a cooling system is generally equipped to dissipate heat in the data center. Since the cooling system is in operation for a long time, higher requirements are put forward for the energy saving of the cooling system. SUMMARY

[0003] Therefore, it is necessary to provide a cooling system to solve the problems of poor energy saving and low use reliability of the traditional cooling system.

[0004] A cooling system, comprising:

[0005] a flow path comprising an inlet and an outlet;

[0006] a dry cooler connected between the inlet and the outlet;

[0007] a cold storage tank connected between the inlet and the outlet;

[0008] a valve assembly arranged in the flow path; the cooling system has a first mode and a second mode, and the cooling system is switched between the first mode and the second mode by controlling the valve assembly;

[0009] When the cooling system is in the first mode, the heat carrier flows into the dry cooler through the inlet and flows out through the outlet; when the cooling system is in the second mode, the heat carrier flows into the dry cooler and the cold storage tank through the inlet and flows out through the outlet.

[0010] In one of the embodiments, the cooling system has a third mode; when the cooling system is in the third mode, the heat carrier flows in through the inlet; wherein a part of the heat carrier flows through the dry cooler and the cold storage tank and flows out through the outlet; another part of the heat carrier flows through the dry cooler and flows out from the outlet; or

[0011] When the cooling system is in the third mode, the heat carrier flows into the dry cooler through the inlet; at least part of the heat carrier flowing out of the dry cooler flows into the cold storage tank.

[0012] In one of the embodiments, the flow path comprises a first branch, a second branch, a third branch and a fourth branch; the first branch is connected in series with the fourth branch, and the second branch and the third branch are connected in parallel between the first branch and the fourth branch.

[0013] The dry cooler is arranged in the first branch or the fourth branch, and the cold storage tank is arranged in the second branch or the third branch; one of the inlet and the outlet is arranged in the first branch, and the other is arranged in the second branch.

[0014] The valve assembly comprises a first valve and a second valve, one of which is arranged in the second branch, and the other is arranged in the third branch, to control the on and off of the second branch and the third branch.

[0015] In one of the embodiments, the inlet is arranged in the first branch, and the outlet is arranged in the second branch.

[0016] In one of the embodiments, the cooling system comprises a first temperature sensor for acquiring the actual cooling temperature of the cold carrier at the outlet.

[0017] When the cooling system is in the first mode, the output power of the dry cooler is adjusted according to the difference between the target cooling temperature of the load and the actual cooling temperature.

[0018] In one of the embodiments, the cooling system comprises a second temperature sensor for acquiring the ambient temperature, and the cooling system switches between the first mode and the second mode according to the difference between the target cooling temperature and the ambient temperature.

[0019] In one of the embodiments, when the difference between the target cooling temperature and the ambient temperature is greater than or equal to T2℃, the cooling system switches to the first mode; when the difference between the target cooling temperature and the ambient temperature is less than or equal to T3℃, the cooling system switches to the second mode or the third mode to achieve energy saving; wherein T2 is greater than T3.

[0020] In one of the embodiments, a third temperature sensor is connected to the cold storage tank for detecting the temperature of the cold carrier in the cold storage tank; a fourth temperature sensor is arranged on the first branch for detecting the first cooling temperature of the cold carrier flowing out of the dry cooler.

[0021] When the difference between the first cooling temperature and the temperature of the cold carrier in the cold storage tank is greater than or equal to T4, the cooling system is in the second mode or the third mode; otherwise, the cooling system is in the first mode.

[0022] In one embodiment, the second valve is a regulating valve used to regulate the flow rate of the refrigerant flowing into the third branch.

[0023] In one embodiment, the cold storage tank includes two sidewalls arranged radially opposite each other, and each of the two sidewalls is provided with a plurality of baffles extending from one sidewall of the cold storage tank toward the other sidewall, with the baffles on the two sidewalls being alternately arranged along the flow direction of the refrigerant.

[0024] This technical solution offers the following advantages: The aforementioned cooling system includes a flow path, a dry cooler, a cold storage tank, and a valve assembly. When the ambient temperature is low, the refrigerant in the cold storage tank can exchange heat with the outside cold air through a heat exchanger, storing the low-temperature refrigerant within the tank. In the first mode, the refrigerant is cooled by the dry cooler and discharged through the outlet to cool the load. The first mode can operate under different cooling demands, and is preferably used to cool loads with lower cooling demands. In the second mode, the refrigerant is cooled by the dry cooler, flows out of the dry cooler, and enters the cold storage tank, thereby forcing out the low-temperature refrigerant stored in the tank, resulting in a lower temperature for the refrigerant flowing out of the outlet, thus cooling the load. The second mode can operate under different cooling demands, and is preferably used to cool loads with medium to high cooling demands. By controlling the valve assembly, the cooling system can operate in different modes, adapting to different levels of cooling demand and reducing energy waste caused by high cooling levels when cooling demand is low. In addition, since the refrigerant flowing out of the dry cooler can enter the cold storage tank and push out the low-temperature refrigerant stored in the cold storage tank, the operating power of the dry cooler can be reduced, thus reducing the electricity consumption caused by the dry cooler operating at high power. While meeting the cooling demand, it can also play a certain role in energy saving. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a cooling system provided in an embodiment of the present invention;

[0026] Figure 2 for Figure 1 The diagram shown is a schematic of the cooling system in its first mode;

[0027] Figure 3 for Figure 1 The diagram shown illustrates the cooling system in its second mode.

[0028] Figure 4 for Figure 1 The diagram shown illustrates the cooling system in its third mode.

[0029] Figure 5 forFigure 1 Schematic diagram of the cold storage tank in the cooling system.

[0030] Fig. 10 is a schematic diagram of the cooling system. DETAILED DESCRIPTION

[0031] In order to make the above objectives, features and advantages of the present application more apparent, specific embodiments of the present application will be described in detail below with reference to the accompanying drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application. However, the present application can be practiced in a number of different ways without being limited to the embodiments described herein, and it is understood that variations can be made in the embodiments by those skilled in the art without departing from the scope of the present application.

[0032] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0033] In addition, the terms "first", "second", "third" and the like are only used for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can include at least one of the features explicitly or implicitly. In the description of the present application, the meaning of "a plurality of" is at least two, for example, two, three, etc., unless otherwise explicitly specified.

[0034] In the present application, unless specifically defined otherwise, the terms "mount", "connected", "connecting", "fixed", and the like, should be construed broadly and can be understood as, for example, fixedly connected, or detachably connected, or integrated; can be mechanical connection, or electrical connection; can be direct connection, or indirect connection via an intermediate medium; can be internal communication between two elements, or interaction between two elements, unless specifically defined otherwise. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0035] In the present application, unless specifically defined otherwise, the first feature is "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature "above", "over" and "on" the second feature can be that the first feature is directly above or obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature "below", "under" and "under" the second feature can be that the first feature is directly below or obliquely below the second feature, or only indicates that the horizontal height of the first feature is less than that of the second feature.

[0036] It should be noted that when an element is referred to as "fixed to" or "provided on" another element, it can be directly on the other element or there can be a middle element. When an element is referred to as "connected to" another element, it can be directly connected to the other element or there can be a middle element. The terms "vertical", "horizontal", "up", "down", "left", "right" and similar expressions used herein are for illustrative purposes only and are not the only implementation.

[0037] As shown in Figure 1 An embodiment of the present application provides a cooling system 10, which includes a flow path, a desiccant cooler 100, a cold storage tank 200 and a valve assembly. The flow path includes an inlet 411 and an outlet 421; the desiccant cooler 100 is connected between the inlet 411 and the outlet 421; the cold storage tank 200 is connected between the inlet 411 and the outlet 421. The valve assembly is arranged on the flow path, and the cooling system 10 has a first mode and a second mode, and the cooling system 10 is switched between the first mode and the second mode by controlling the valve assembly. As shown in Figure 2 When the cooling system 10 is in the first mode, the coolant flows into the desiccant cooler 100 through the inlet 411 and flows out through the outlet 421. As shown in Figure 3 When the cooling system 10 is in the second mode, the coolant flows into the desiccant cooler 100 and the cold storage tank 200 through the inlet 411 and flows out through the outlet 421.

[0038] When the ambient temperature is low, the coolant in the cold storage tank can exchange heat with the cold air outside through the heat exchanger to store the low-temperature coolant in the cold storage tank. When the cooling system 10 is in the first mode, the coolant passes through the dry cooler 100 to be cooled and is discharged from the outlet 421, so as to cool the load, such as a data center. The first mode can be operated under different refrigeration requirements, and is preferably used for cooling a load with low refrigeration requirement. When the cooling system 10 is in the second mode, the coolant passes through the dry cooler 100 to be cooled and then enters the cold storage tank, so as to press the low-temperature coolant in the cold storage tank out, so that the temperature of the coolant flowing out of the outlet 421 reaches a lower level to cool the load. The second mode can be operated under different refrigeration requirements, and is preferably used for cooling a load with medium-high refrigeration requirement.

[0039] In addition, by controlling the cooling system 10 to be in the second mode, the low-temperature coolant in the cold storage tank 200 is pressed out, the external cold energy is fully utilized, the output power of the dry cooler 100 is reduced, the power consumption of the dry cooler 100 operating at a high power is reduced, the refrigeration requirement is met, and the energy saving effect is achieved to a certain extent.

[0040] When the dry cooler 100 fails, the cooling system 10 can also be in the second mode, so as to press the low-temperature liquid in the cold storage tank 200 out to cool the load, realize uninterrupted cooling, cope with the emergency situation, improve the cooling reliability of the cooling system, and further ensure the operation safety of the data center.

[0041] It can be understood that the cold storage tank is provided with a coolant interface, and the cold storage tank 200 is provided with a flow channel for the flow of the coolant. The coolant flows into the flow channel through the coolant interface and can be stored in the flow channel. When the ambient temperature is low, the coolant in the cold storage tank 200 can exchange heat with the cold air outside through the heat exchanger to store the low-temperature coolant in the cold storage tank 200. After the coolant flowing out of the dry cooler enters the flow channel, the previously stored low-temperature coolant can be pressed out, so that the temperature of the coolant flowing out of the cold storage tank is low. The coolant can be ethylene glycol solution, propylene glycol solution or salt water, etc. The cooling system includes a controller 600, the controller 600 is electrically connected with the valve assembly, and the controller 600 controls the valve assembly to make the cooling system 10 be in different modes, so as to adapt to different degrees of refrigeration requirement.

[0042] As Figure 5As shown, in one embodiment, the cold storage tank 200 comprises a first side wall and a second side wall arranged in a radial direction. A plurality of baffles 210 are arranged on the first side wall and the second side wall, the baffles 210 on the first side wall extend from the first side wall towards the second side wall, and the baffles 210 on the second side wall extend from the second side wall towards the first side wall. The baffles 210 on the first side wall and the second side wall are alternately arranged along the flow direction of the heat carrier, and the plurality of baffles 210 form an S-shaped flow channel in the cold storage tank 200. Compared with a straight flow channel, the S-shaped flow channel can increase the flow path of the heat carrier flowing into the cold storage tank 200, so that the heat carrier flowing into the cold storage tank can press the low-temperature heat carrier stored in the cold storage tank out.

[0043] As shown in FIG. 1, the cooling system 10 comprises a heat carrier flow path, a heat carrier inlet 411, a heat carrier outlet 421, a cold storage tank 200, a dry cooler 100, and a valve assembly. Figure 4 As shown, in one embodiment, the cooling system 10 has a third mode. The third mode is a charging mode. When the cooling system 10 is in the charging mode, the heat carrier flows into the dry cooler 100 through the inlet 411, is cooled and cooled by the dry cooler 100, and part of the heat carrier flows into the cold storage tank 200, and the heat carrier with a higher temperature in the cold storage tank is pressed out, so that the low-temperature heat carrier is stored in the cold storage tank, and the cold storage tank is charged.

[0044] In another embodiment, the third mode is a split mode. When the cooling system 10 is in the split mode, the heat carrier flows into the dry cooler 100 through the inlet 411. Among them, part of the heat carrier flows through the dry cooler 100 and the cold storage tank 200, and then flows out through the outlet 421; another part of the heat carrier flows through the dry cooler 100 and flows out from the outlet 421. That is, part of the heat carrier flowing out of the dry cooler enters the cold storage tank, and another part of the heat carrier directly flows out. The heat carrier entering the cold storage tank can press the low-temperature heat carrier in the cold storage tank out, and the heat carrier directly flowing out and the heat carrier entering the cold storage tank are combined at the outlet 421 to flow out, thereby cooling and cooling the load. Preferably, the split mode can adapt to the load with medium or low refrigeration demand.

[0045] As shown in FIG. 1, the cooling system 10 comprises a heat carrier flow path, a heat carrier inlet 411, a heat carrier outlet 421, a cold storage tank 200, a dry cooler 100, and a valve assembly. Figure 4 As shown, in one embodiment, the flow path comprises a first branch 410, a second branch 420, a third branch 430, and a fourth branch 440. The first branch 410 and the fourth branch 440 are connected in series, and the second branch 420 and the third branch 430 are connected in parallel between the first branch 410 and the fourth branch 440. Among them, the inlet 411 and the dry cooler 100 are arranged on the first branch 410, the cold storage tank 200 is arranged on the third branch 430, and the outlet 421 is arranged on the fourth branch 440. The valve assembly comprises a first valve 310 and a second valve 320, the first valve 310 is arranged on the second branch 420 to control the conduction and disconnection of the second branch 420, and the second valve 320 is arranged on the third branch 430 to control the conduction and disconnection of the third branch 430.

[0046] In other words, when the first valve 310 is opened, the first branch 410 and the second branch 420 are connected. The refrigerant passes sequentially through the dry cooler 100 of the first branch 410, the second branch 420, and the fourth branch 440, and flows out through the outlet 421. When the second valve 320 is opened, the first branch 410 and the third branch 430 are connected. The refrigerant first passes through the dry cooler 100, then through the cold storage tank 200, and flows out through the outlet 421 to meet different levels of cooling demand. The first and second valves can be electric ball valves, solenoid valves, etc.

[0047] In another embodiment, the flow path includes a first loop and a second loop. An inlet and an outlet are respectively located at the beginning and end of the first loop, and the beginning of the second loop is connected to the inlet, while the end of the second loop is connected to the outlet. A first valve and a second valve are respectively installed on the first and second loops. A dry cooler is installed on the first loop, and a dry cooler and a cold storage tank are installed on the second loop. The two dry coolers are of the same model. By controlling the opening and closing of the two valves, the cooling system can be in a first mode, a second mode, or a third mode.

[0048] like Figure 4 As shown, in one embodiment, the cooling system 10 includes a first temperature sensor 512. The first temperature sensor 512 is used to obtain the actual cooling temperature of the refrigerant located at outlet 421, i.e., the temperature at which the refrigerant enters the load after being cooled by the cooling system 10. Understandably, the first temperature sensor 512 is electrically connected to the controller 600. The target cooling temperature of the refrigerant is the cooling temperature required by the load, such as a data center, and this target cooling temperature can be manually set according to actual needs.

[0049] When the cooling system 10 is in the first mode, the output power of the dry cooler 100 is adjusted according to the difference between the target cooling temperature and the actual cooling temperature. For example, when the target cooling temperature is greater than the actual cooling temperature and the difference between the two is small, such as less than 2 degrees Celsius, the output power of the dry cooler 100 can be maintained at the current value. When the target cooling temperature is greater than the actual cooling temperature and the difference between the two is larger, such as greater than or equal to 2 degrees Celsius, the output power of the dry cooler 100 can be reduced to meet the cooling demand while reducing energy waste. When the actual cooling temperature is greater than the target cooling temperature, the output power of the dry cooler 100 is increased.

[0050] In a specific embodiment, the dry cooler 100 comprises a heat dissipation fan, the fan is operated to drive air to flow through the heat exchanger, so as to take away the heat of the high-temperature liquid inside the heat exchanger, and realize the temperature reduction of the high-temperature liquid. The power adjustment of the dry cooler is realized by adjusting the rotating speed of the fan. The rotating speed of the heat dissipation fan is adjusted according to the difference between the target cooling temperature and the actual cooling temperature. When the target cooling temperature is greater than the actual cooling temperature and the difference between the two is small, for example, the difference is less than 2 degrees Celsius, the rotating speed of the heat dissipation fan can be kept at the current value. When the target cooling temperature is greater than the actual cooling temperature and the difference between the two is large, for example, the difference is greater than or equal to 2 degrees Celsius, the rotating speed of the heat dissipation fan can be reduced to meet the refrigeration demand and reduce the power waste of the heat dissipation fan.

[0051] In an embodiment, after the dry cooler runs at the current output power for a first preset time length, the target cooling temperature is reacquired, and the first temperature sensor re-detects the actual cooling temperature of the secondary refrigerant at the outlet. If the target cooling temperature is greater than the actual cooling temperature and the difference between the two is less than T1℃, it indicates that the current refrigeration efficiency can match the actual refrigeration demand, so the controller controls the dry cooler to keep at the current output power. When the actual cooling temperature is less than the target cooling temperature and the difference between the two is greater than or equal to T1℃, it indicates that the current refrigeration efficiency is greater than the actual refrigeration demand, so the controller controls the output power of the dry cooler to decrease. When the actual cooling temperature is greater than the target cooling temperature, it indicates that the current refrigeration efficiency is insufficient to meet the actual refrigeration demand, so the controller controls the output power of the dry cooler to increase, so as to meet the refrigeration demand of the load. The dry cooler is provided with a power regulator, the power regulator is electrically connected with the controller, and the output power of the dry cooler is adjusted through the power regulator. The first preset time length can be 5min-60min, and T1 can be 2℃-6℃.

[0052] As shown in Figure 1 In an embodiment, the cooling system 10 comprises a second temperature sensor 513 for acquiring the ambient temperature, and the cooling system 10 is switched between the first mode and the second mode according to the difference between the target cooling temperature and the ambient temperature. The second temperature sensor 513 can be arranged on the shell of the dry cooler 100, and the ambient temperature is detected by arranging the second temperature sensor 513. When the ambient temperature is lower than the target cooling temperature, the cooling system is in the first mode, and the cold energy of the outside is stored.

[0053] In one embodiment, when the target cooling temperature is greater than the ambient temperature and the difference between the two is greater than or equal to T2°C, the cooling system 10 switches to a first mode; when the difference between the target cooling temperature and the ambient temperature is less than or equal to T3°C, the cooling system 10 switches to a second mode; wherein T2 is greater than T3. When the difference between the target cooling temperature and the ambient temperature is large, it indicates that the ambient temperature is low, and the cooling system is in the first mode to store the external cold. When the difference between the target cooling temperature and the ambient temperature is small, the system can switch to the second mode, allowing the refrigerant to flow from the dry cooler into the cold storage tank, thereby expelling the lower-temperature liquid in the cold storage tank. For example, when the target cooling temperature is greater than the ambient temperature and the difference between the two is greater than or equal to 12°C, the cooling system 10 switches to the first mode; when the difference between the target cooling temperature and the ambient temperature is less than or equal to 8°C, the cooling system 10 switches to the second mode, thereby expelling the low-temperature refrigerant in the cold storage tank to cool the load.

[0054] like Figure 1 As shown, in one embodiment, a fourth temperature sensor 515 is provided at the end of the first branch 410 to detect the first cooling temperature of the refrigerant flowing out of the dry cooler 100. The cooling system 10 also includes a third temperature sensor 514, which is used to obtain the temperature of the refrigerant in the cold storage tank 200. When the first cooling temperature is greater than the temperature of the refrigerant in the cold storage tank, and the difference between the two is greater than or equal to T4℃, the cooling system 10 switches to the second mode; otherwise, the cooling system 10 is in the first mode. When the difference between the two is large, it indicates that the temperature of the refrigerant in the cold storage tank is lower than the temperature of the refrigerant flowing out of the dry cooler. Therefore, after the refrigerant flowing out of the dry cooler enters the cold storage tank, it can force out the low-temperature refrigerant. When the difference between the two is small, it indicates that the temperature difference between the refrigerant in the cold storage tank and the temperature of the refrigerant cooled by the dry cooler is small. Therefore, the cooling system 10 can be in the first mode. T4 can be 6℃-8℃. For example, if T4 is 8 degrees Celsius, that is, when the difference between the first cooling temperature and the temperature of the refrigerant in the cold storage tank is greater than or equal to 8 degrees Celsius, it means that the temperature of the refrigerant in the cold storage tank is low. Therefore, after the refrigerant enters the cold storage tank, it can push out the low-temperature refrigerant.

[0055] In an embodiment, taking the third mode as an example, when the difference between the first cooling temperature and the temperature of the cold storage tank is greater than or equal to T4℃, and the difference between the target cooling temperature and the temperature of the cold storage tank is greater than or equal to T5℃, the controller controls the cooling system to switch to the split-flow mode. When the difference between the first cooling temperature and the temperature of the cold storage tank is greater than or equal to T4℃, and the difference between the target cooling temperature and the temperature of the cold storage tank is less than T5℃, the controller controls the cooling system to switch to the second mode. When the difference between the target cooling temperature and the temperature of the cold storage tank is large, it indicates that the target cooling temperature is much higher than the temperature of the cold storage tank, i.e., the temperature of the low-temperature cold storage medium in the cold storage tank is low, and therefore, a part of the cold storage medium can flow into the cold storage tank through the dry cooler to press out the low-temperature cold storage medium, and another part of the cold storage medium flows out from the outlet after passing through the dry cooler. T5℃ can be 4-8℃.

[0056] In another embodiment, after the cooling system runs for a second preset time length in the first mode, the second mode or the third mode, the controller obtains the target cooling temperature, and reacquires the first cooling temperature and the temperature of the cold storage tank by using the fourth temperature sensor and the third temperature sensor and the first temperature sensor. If the difference between the first cooling temperature and the temperature of the cold storage tank is less than T4℃, the controller controls the cooling system to run in the first mode. The second preset time length can be 5-60 minutes, and T4 can be 6-8℃.

[0057] Specifically, if the difference between the first cooling temperature and the temperature of the cold storage tank is less than 6℃, the first branch, the second branch and the third branch are turned on. The first valve is in an open state, and the second valve is in a closed state, so that the cold storage medium sequentially passes through the inlet and the dry cooler, and flows out through the outlet.

[0058] If the difference between the first cooling temperature and the temperature of the cold storage tank is greater than or equal to T4℃, and the difference between the target cooling temperature and the temperature of the cold storage tank is less than T5℃, the controller controls the cooling system to run in the second mode. T5 can be 4-8℃.

[0059] Specifically, if the difference between the first cooling temperature and the temperature of the cold storage tank is greater than or equal to 6℃, and the difference between the target cooling temperature and the temperature of the cold storage tank is less than 6℃, the first branch, the third branch and the fourth branch are turned on. The first valve is in a closed state, and the second valve is in an open state, so that the cold storage medium sequentially passes through the inlet, the dry cooler and the cold storage tank, and flows out through the outlet.

[0060] If the difference between the first cooling temperature and the temperature of the cold storage tank is greater than or equal to T4℃, and the difference between the target cooling temperature and the temperature of the cold storage tank is greater than or equal to T5℃, the controller controls the cooling system to run in the split-flow mode.

[0061] Specifically, if the temperature difference between the first cooling temperature and the refrigerant temperature in the cold storage tank is greater than or equal to 6°C, and the temperature difference between the target cooling temperature and the refrigerant temperature in the cold storage tank is greater than or equal to 6°C, then the first branch, the second branch, the third branch, and the fourth branch are all connected. The first valve and the second valve are both open, and the second valve is adjusted to a suitable opening degree, so that a portion of the refrigerant flows directly out through the outlet after passing through the inlet and the dry cooler, while the other portion flows out through the outlet after passing through the dry cooler and the cold storage tank.

[0062] By re-acquiring the corresponding temperature parameters at regular intervals, the cooling system is determined to operate in the corresponding mode based on these parameters. This satisfies the cooling needs of the data center while reducing unnecessary cooling losses, ensuring the safe operation of the data center, and achieving a certain degree of energy saving.

[0063] like Figure 3 and Figure 4 As shown, in one embodiment, the second valve 320 is a regulating valve used to regulate the flow rate of the refrigerant flowing into the third branch 430. By adjusting the flow rate of the refrigerant flowing into the third branch 430, the flow rate of the refrigerant being expelled from the cold storage tank 200 is adjusted. For example, when the cooling demand is low, the opening of the regulating valve is reduced, resulting in a decrease in the flow rate of the refrigerant flowing into the third branch 430. Consequently, less low-temperature refrigerant is expelled from the cold storage tank 200, thus saving cooling capacity in the cold storage tank 200. When the cooling demand is high, the opening of the regulating valve is increased, resulting in an increase in the flow rate of the refrigerant flowing into the third branch 430. Consequently, more low-temperature refrigerant is expelled from the cold storage tank 200, meeting the higher cooling demand.

[0064] like Figure 4 As shown, in one embodiment, a fifth temperature sensor 516 is provided at the end of the third branch 430 to obtain the second cooling temperature of the refrigerant flowing out of the cold storage tank 200. When the cooling system 10 is in the diversion mode, if the target cooling temperature is greater than the second cooling temperature, and the difference between the two is greater than or equal to T6℃, the opening of the second valve can be reduced to decrease the flow rate of the refrigerant entering the third branch 430, reduce the flow rate of the low-temperature refrigerant flowing out of the cold storage tank, and reduce the cooling capacity consumption of the cold storage tank 200. T6 can be 4℃-6℃.

[0065] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0066] The above embodiments only express several implementation manners of the present application, and the description is more specific and detailed, but it should not be understood as a limitation on the scope of the patent. It should be noted that for ordinary skilled persons in the art, without departing from the concept of the present application, several modifications and improvements can be made, which are within the scope of protection of the present application. Therefore, the protection scope of the patent of the present application should be subject to the appended claims.

Claims

1. A cooling system, characterized in that, include: The flow path includes an inlet (411) and an outlet (421). A dry cooler (100) is connected between the inlet (411) and the outlet (421); A cold storage tank (200) is connected between the inlet (411) and the outlet (421); A valve assembly is disposed in the flow path, and the cooling system has a first mode and a second mode. By controlling the valve assembly, the cooling system can switch between the first mode and the second mode. When the cooling system is in the first mode, the refrigerant flows into the dry cooler (100) through the inlet (411) and flows out through the outlet (421); when the cooling system is in the second mode, the refrigerant flows into the dry cooler (100) and the cold storage tank (200) through the inlet (411) and flows out through the outlet (421). The cooling system has a third mode; in the third mode, the refrigerant flows in through the inlet (411); wherein a portion of the refrigerant flows through the dry cooler (100) and the cold storage tank (200) and flows out through the outlet (421); another portion of the refrigerant flows through the dry cooler (100) and flows out from the outlet (421); or, in the third mode, the refrigerant flows into the dry cooler (100) through the inlet (411); at least a portion of the refrigerant flowing out of the dry cooler (100) flows into the cold storage tank (200). When the difference between the first cooling temperature of the refrigerant flowing out of the dry cooler (100) and the temperature of the refrigerant in the cold storage tank (200) is greater than or equal to T4, the cooling system is in the second mode or the third mode; otherwise, the cooling system is in the first mode.

2. The cooling system according to claim 1, characterized in that, The flow path includes a first branch (410), a second branch (420), a third branch (430), and a fourth branch (440); the first branch (410) and the fourth branch (440) are connected in series, and the second branch (420) and the third branch (430) are connected in parallel between the first branch (410) and the fourth branch (440); The dry cooler (100) is located in the first branch (410) or the fourth branch (440), and the cold storage tank (200) is located in the second branch (420) or the third branch (430); one of the inlet (411) and the outlet (421) is located in the first branch (410), and the other is located in the fourth branch (440). The valve assembly includes a first valve (310) and a second valve (320), one of which is disposed in the second branch (420) and the other is disposed in the third branch (430) to control the opening and closing of the second branch (420) and the third branch (430).

3. The cooling system according to claim 2, characterized in that, The entrance (411) is located on the first branch (410), and the exit (421) is located on the fourth branch (440).

4. The cooling system according to claim 2, characterized in that, The cooling system includes a first temperature sensor (512) for obtaining the actual cooling temperature of the refrigerant located at the outlet (421); When the cooling system is in the first mode, the output power of the dry cooler (100) is adjusted according to the difference between the target cooling temperature of the load and the actual cooling temperature.

5. The cooling system according to claim 4, characterized in that, The cooling system includes a second temperature sensor (513) for acquiring the ambient temperature, and the cooling system switches between a first mode and a second mode based on the difference between the target cooling temperature and the ambient temperature.

6. The cooling system according to claim 5, characterized in that, When the difference between the target cooling temperature and the ambient temperature is greater than or equal to T2℃, the cooling system switches to the first mode; when the difference between the target cooling temperature and the ambient temperature is less than or equal to T3℃, the cooling system switches to the second mode or the third mode to achieve energy saving; wherein, T2 is greater than T3.

7. The cooling system according to claim 2, characterized in that, A third temperature sensor (514) is connected to the cold storage tank to detect the temperature of the refrigerant inside the cold storage tank (200); a fourth temperature sensor (515) is provided on the first branch to detect the first cooling temperature of the refrigerant flowing out of the dry cooler.

8. The cooling system according to claim 2, characterized in that, The second valve (320) is a regulating valve, which is used to regulate the flow rate of the refrigerant flowing into the third branch (430).

9. The cooling system according to claim 1, characterized in that, The cold storage tank (200) includes two side walls arranged radially opposite each other, and a plurality of baffles (210) are provided on each of the two side walls. The baffles (210) extend from one side wall of the cold storage tank (200) toward the other side wall, and the baffles (210) on the two side walls are alternately arranged along the flow direction of the refrigerant.

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