A cold storage tank coldness monitoring device and a cold storage tank coldness monitoring method

Abstract

The application provides a cold storage tank cold quantity monitoring device and a cold storage tank cold quantity monitoring method. A plurality of first temperature sensors are distributed along the axial direction of the cold storage tank. The first temperature sensors can measure the temperature of the cooling liquid at each position in the cold storage tank. A processor can calculate the real-time cold storage quantity of the cold storage tank by combining the temperature values of the plurality of first temperature sensors, the water outlet flow of the cold storage tank, and the return water temperature of the cold storage tank. By comparing the real-time cold storage quantity of the cold storage tank with the rated cold quantity, the cold quantity of the cold storage tank can be effectively monitored. In this way, the staff can respond in a timely manner according to the monitoring results, which can effectively prevent the cold storage tank from providing the air conditioning system with the cooling liquid after being warmed up, avoid the influence of the cold storage tank providing the air conditioning system with the cooling liquid after being warmed up on the normal cooling of the air conditioning system to the data center, and effectively improve the stability and reliability of the air conditioning system for cooling the data center and the stability of the operation of the data center.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cold storage tanks, and particularly relates to a cold storage tank cold quantity monitoring device and a cold storage tank cold quantity monitoring method. BACKGROUND

[0002] A data center is a space and physical equipment for storing key application programs and data. Key components of a data center design include routers, switches, firewalls, storage systems, servers, monitoring devices, and various types of application programs. The physical equipment of the data center continuously generates heat during operation, and excessive heat directly affects the normal operation of the data center. Therefore, the machine room where the data center is located usually has an air conditioning system to continuously cool the data center, thereby ensuring that the data center can operate normally.

[0003] Generally, when an emergency power failure occurs in an electrical power system, an emergency cooling supply is provided for the air conditioning system by a cold storage tank to ensure that the air conditioning system can continuously cool the data center during the circuit repair period, thereby ensuring the normal operation of the data center. Specifically, the cold storage tank has a cooling liquid (for example, cold water) therein, the cooling liquid can flow out of the cold storage tank through a water outlet of the cold storage tank and enter the air conditioning system to cool the air conditioning system, and the temperature of the cooling liquid increases after cooling is completed, and then the cooling liquid flows back to the cold storage tank through a water return port of the cold storage tank.

[0004] However, in the above-mentioned process of cooling the cold storage tank, it is difficult for the staff to monitor the remaining cold quantity of the cold storage tank, which can easily affect the cooling of the data center by the air conditioning system due to the increase in the temperature of the cooling liquid in the cold storage tank. SUMMARY

[0005] The present application provides a cold storage tank cold quantity monitoring device and a cold storage tank cold quantity monitoring method to solve the problem that the staff cannot monitor the remaining cold quantity of the cold storage tank in the process of cooling the existing cold storage tank, which can easily affect the cooling of the data center by the air conditioning system due to the increase in the temperature of the cooling liquid in the cold storage tank.

[0006] The first aspect of the present application provides a cold storage tank cold quantity monitoring device for monitoring the cold storage quantity of a cold storage tank, comprising a plurality of first temperature sensors, the plurality of first temperature sensors are located on the cold storage tank, and the plurality of first temperature sensors are uniformly distributed along the axial direction of the cold storage tank, and the first temperature sensor is used to measure the temperature of the cooling liquid in the cold storage tank corresponding to the first temperature sensor.

[0007] The flow meter is arranged at a water outlet of the cold storage tank, and is used for measuring the water outlet flow of the cold storage tank.

[0008] The processor is electrically connected with the plurality of first temperature sensors, the flow meter and the second temperature sensor, so that the first temperature sensors, the flow meter and the second temperature sensor transmit the measured data to the processor.

[0009] The first temperature sensors are distributed along the axial direction of the cold storage tank, so that the first temperature sensors can measure the temperature of the cooling liquid at different positions in the cold storage tank, and the processor can calculate the real-time cold storage capacity of the cold storage tank according to the temperature values of the plurality of first temperature sensors, the water outlet flow of the cold storage tank and the return water temperature of the cold storage tank. By comparing the real-time cold storage capacity of the cold storage tank with the rated cold storage capacity, the cold storage capacity of the cold storage tank can be effectively monitored. In this way, the staff can respond in time according to the monitoring result, so that the cold storage tank can be effectively prevented from providing the cooling liquid after being heated to the air conditioning system, and the air conditioning system can be effectively prevented from being affected by the cooling liquid after being heated by the cold storage tank to provide cooling to the data center, thereby improving the stability and reliability of the air conditioning system for providing cooling to the data center, and improving the stability of the data center.

[0010] In a possible implementation manner, the collector is electrically connected with the processor and the load device cooled by the cold storage tank.

[0011] The collector is used for collecting the load capacity of the load device and transmitting the collected load capacity to the processor, so that the processor calculates the remaining cooling time of the cold storage tank in combination with the load capacity.

[0012] In a possible implementation manner, the controller is electrically connected with the processor, and the input ends of the controller are respectively electrically connected with the plurality of first temperature sensors, the flow meter, the second temperature sensor and the collector.

[0013] The controller is used for controlling the plurality of first temperature sensors, the flow meter and the second temperature sensor, so that the plurality of first temperature sensors, the flow meter and the second temperature sensor transmit data to the processor through the controller at a preset time point.

[0014] In a possible implementation, the application further comprises a switch, an input end of the switch being electrically connected to an output end of the controller and an output end of the collector respectively, and an output end of the switch being electrically connected to the processor.

[0015] The switch is configured to transmit data in the controller and the collector to the processor.

[0016] In a possible implementation, the application further comprises a terminal device, the terminal device being electrically connected to an output end of the processor, so that the processor transmits a processing result to the terminal device and displays the processing result on the terminal device.

[0017] In a possible implementation, a height of the first temperature sensor arranged close to a bottom wall of the cold storage tank is equal to a height of a water outlet of the cold storage tank, and a height of the first temperature sensor arranged close to a top wall of the cold storage tank is equal to a height of a backwater outlet of the cold storage tank.

[0018] In an axial direction of the cold storage tank, a spacing between any two adjacent first temperature sensors is equal.

[0019] The second aspect of the application provides a cold storage tank cold quantity monitoring method, which uses the cold storage tank cold quantity monitoring device to monitor the cold quantity of the cold storage tank, and the method comprises the following steps:

[0020] Inputting, in the processor, a water storage height, a water storage radius, a preset water outlet temperature and a preset backwater temperature of the cold storage tank, so that the processor calculates a rated cold quantity of the cold storage tank according to a first calculation formula;

[0021] The processor reads a water outlet flow and a real-time backwater temperature of the cold storage tank;

[0022] The first temperature sensor transmits a measured temperature value to the processor once every preset time interval, so that the processor determines the first temperature sensor whose temperature value changes before and after the preset time interval according to a first determination formula, and records a number corresponding to the first temperature sensor whose temperature value changes;

[0023] The processor calculates a temperature change speed of the cold storage tank according to a second calculation formula;

[0024] The processor calculates a temperature change layer of the cold storage tank by bringing the temperature change speed into a third calculation formula;

[0025] The processor calculates a real-time cold storage quantity of the cold storage tank by bringing the real-time backwater temperature and the temperature change layer into a fourth calculation formula;

[0026] The real-time cold storage amount of the cold storage tank and the rated cold amount of the cold storage tank are brought into a second judgment formula to judge whether the cold storage tank needs to be supplemented with cold amount.

[0027] In a possible implementation, the first calculation formula is: Q0=CxpXpIR 2 XH(Th1-Tg);

[0028] wherein Q0 is the rated cold amount of the cold storage tank, C is the specific heat capacity of the cooling liquid, p is the density of the cooling liquid, R is the water storage radius of the cold storage tank, H is the water storage height of the cold storage tank, Th1 is the preset return water temperature of the cold storage tank, and Tg is the preset outlet water temperature of the cold storage tank.

[0029] In a possible implementation, the first judgment formula is: T t+b -T t > 0.5℃;

[0030] wherein b is the preset time interval, T t+b is the temperature value of the first temperature sensor after the preset time interval, and T t is the temperature value of the first temperature sensor before the preset time interval.

[0031] In a possible implementation, the second calculation formula is: V=G / pIR 2 ;

[0032] wherein V is the temperature change speed of the cold storage tank, and G is the outlet water flow of the cold storage tank.

[0033] In a possible implementation, the third calculation formula is: Ah=Vxb;

[0034] wherein Ah is the temperature change layer of the cold storage tank, V is the temperature change speed of the cold storage tank, and b is the preset time interval.

[0035] In a possible implementation, the fourth calculation formula is:∑Q=CxpXpIR 2 {a(Th2-Ti1)+l(Th2-Ti2)+l(Th2-Ti3)+……+(l-Δh)(Th2-Ti m )};

[0036] Wherein, ∑Q is the real-time cold storage amount of the cold storage tank, C is the specific heat capacity of the cooling liquid, p is the density of the cooling liquid, R is the water storage radius of the cold storage tank, Th2 is the real-time return water temperature of the cold storage tank, along the axial direction of the cold storage tank, from the bottom wall of the cold storage tank to the top wall of the cold storage tank, Tii is the temperature value of the first first temperature sensor, Ti2 is the temperature value of the second first temperature sensor, Ti3 is the temperature value of the third first temperature sensor, Ti m is the temperature value of the first temperature sensor, a is the distance between the first first temperature sensor and the bottom wall of the cold storage tank, and l is the interval distance along the axial direction of the cold storage tank between any two adjacent first temperature sensors.

[0037] In a possible implementation, the second judgment formula is ∑Q / Q0<20%, wherein when the real-time cold storage amount of the cold storage tank and the rated cold storage amount of the cold storage tank satisfy the second judgment formula, it indicates that the cold storage tank needs to be supplemented with cold.

[0038] In a possible implementation, the method further comprises:

[0039] The processor reads the load amount of the load device supplied with cooling by the cold storage tank, and brings the load amount of the load device and the real-time cold storage amount of the cold storage tank into a fifth calculation formula to calculate the coolable duration of the cold storage tank.

[0040] In a possible implementation, the fifth calculation formula is T=∑Q / P, wherein T is the coolable duration of the cold storage tank, and P is the load amount of the load device. BRIEF DESCRIPTION OF DRAWINGS

[0041] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor.

[0042] Figure 1 A structure schematic view of a cold storage tank cold storage monitoring device provided by an embodiment of the present application and a cold storage tank;

[0043] Figure 2 A structure schematic view of a cold storage tank cold storage monitoring device provided by an embodiment of the present application;

[0044] Figure 3 A flow chart of a cold storage tank cold storage monitoring method provided by an embodiment of the present application.

[0045] Reference Signs List:

[0046] 100 - cold storage tank cold quantity monitoring device

[0047] 110 - first temperature sensor

[0048] 120 - flow meter

[0049] 130 - second temperature sensor

[0050] 140 - processor

[0051] 150 - collector

[0052] 160 - controller

[0053] 170 - switch

[0054] 180 - terminal device

[0055] 200 - cold storage tank

[0056] 210 - water outlet

[0057] 220 - backwater inlet DETAILED DESCRIPTION

[0058] To make the objectives, technical solutions, and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0059] As the content in the above background, at present, when the power system fails and the air conditioning system cannot start power to supply cooling for the data center, the air conditioning system is usually supplied with cooling by the cold storage tank during the power repair process. Specifically, the cold storage tank has cooling liquid (such as cold water) therein, and the cooling liquid in the cold storage tank can enter the air conditioning system to supply cooling for the air conditioning system, so that the air conditioning system can supply cooling for the data center.

[0060] Among them, the temperature of the cooling liquid in the cold storage tank will rise after completing the circulation in the air conditioning system, and the cooling liquid after rising in temperature will flow back into the cold storage tank. Therefore, before the cooling liquid in the cold storage tank is completely warmed up, the staff needs to replace a new cold storage tank in time, or cool the cooling liquid in the cold storage tank after rising in temperature, so that the cold storage tank can continue to supply cooling for the air conditioning system, and avoid the cooling liquid after rising in temperature to affect the refrigeration effect of the air conditioning system, and further affect the normal operation of the data center.

[0061] However, when the above-mentioned cold storage tank supplies cooling to the air conditioning system, it is difficult for the staff to detect the residual cold of the cold storage tank, and it is not possible to determine when to cool or replace the cooling liquid in the cold storage tank, which can affect the cooling of the data center by the air conditioning system due to the increase in the temperature of the cooling liquid in the cold storage tank, thereby affecting the normal operation of the data center.

[0062] Based on the above problems, the embodiments of the present application provide a cold storage tank cold monitoring device and a cold storage tank cold monitoring method, which can effectively monitor the cold of the cold storage tank, so that the staff can master the cooling condition of the cold storage tank in real time, and respond according to the actual situation to ensure the stability and reliability of the air conditioning system for the data center.

[0063] Figure 1 A structure diagram of a cold storage tank cold monitoring device provided by the embodiments of the present application connected with the cold storage tank, Figure 2 A structure diagram of a cold storage tank cold monitoring device provided by the embodiments of the present application.

[0064] The embodiments of the present application provide a cold storage tank cold monitoring device 100, which can monitor the cold of the cold storage tank 200, so that the staff can master the cooling condition of the cold storage tank 200 in real time, as shown in the figure, Figure 1 The cold storage tank cold monitoring device 100 can include a plurality of first temperature sensors 110, which can be arranged on the cold storage tank 200, for example, the plurality of first temperature sensors 110 can be uniformly distributed along the axial direction of the cold storage tank 200 (i.e. Figure 1 The first temperature sensor 110 can be used to measure the temperature of the cooling liquid at the position corresponding to the first temperature sensor 110 in the cold storage tank 200.

[0065] The cold storage tank 200 can be used to store cooling liquid (for example, water), and the cold storage tank 200 is respectively provided with a water outlet 210 and a water return port 220. The cooling liquid in the cold storage tank 200 can flow out through the water outlet 210 and enter the air conditioning system, and the cooling liquid can flow back to the cold storage tank 200 through the water return port 220 after circulating and heating in the air conditioning system. The water outlet 210 of the cold storage tank 200 can be arranged close to the bottom wall of the cold storage tank 200, and the water return port 220 of the cold storage tank 200 can be arranged close to the top wall of the cold storage tank 200. In this way, during the cooling process of the cold storage tank 200, the cooling liquid in the cold storage tank 200 will gradually heat up from the top wall to the bottom wall of the cold storage tank 200, and when the cooling liquid close to the bottom wall of the cold storage tank 200 is also heated up, it indicates that the cold in the cold storage tank 200 has been completely released. At this time, the staff needs to cool the cooling liquid in the cold storage tank 200 in time, or replace a new cold storage tank for the air conditioning system.

[0066] The first temperature sensor 110 can measure the temperature of the cooling liquid in each layer of the cold storage tank 200 to detect the position where the temperature of the cooling liquid in the cold storage tank 200 changes, so as to provide data reference for subsequent judgment. For example, the height of the first temperature sensor 110 arranged near the bottom wall of the cold storage tank 200 can be equal to the height of the water outlet 210 of the cold storage tank 200, the height of the first temperature sensor 110 arranged near the top wall of the cold storage tank 200 can be equal to the height of the water return port 220 of the cold storage tank 200, and the distance between any two adjacent first temperature sensors 110 in the axial direction of the cold storage tank 200 can be equal. For example, as shown in FIG. 1, the distance between any two adjacent first temperature sensors 110 can be l. This helps to simplify the calculation of the cold storage tank cold quantity monitoring device 100 during monitoring, and helps to improve the accuracy of the cold storage tank cold quantity monitoring device 100 in detecting the temperature of the cooling liquid in the cold storage tank 200. Figure 1

[0067] The cold storage tank cold quantity monitoring device 100 can further include a flow meter 120 and a second temperature sensor 130. The flow meter 120 is arranged at the water outlet 210 of the cold storage tank 200, and can be used to measure the water outlet flow of the cold storage tank 200. The second temperature sensor 130 can be arranged at the water return port 220 of the cold storage tank 200, and can be used to measure the water return temperature of the cold storage tank 200.

[0068] In combination with Figure 2 As shown in FIG. 1, the cold storage tank cold quantity monitoring device 100 can further include a processor 140. The processor 140 can be electrically connected with the plurality of first temperature sensors 110, the flow meter 120 and the second temperature sensor 130, so that the first temperature sensors 110, the flow meter 120 and the second temperature sensor 130 can transmit the measured data to the processor 140. The processor 140 can process the data measured by the first temperature sensors 110, the flow meter 120 and the second temperature sensor 130, and monitor the real-time cold storage quantity of the cold storage tank 200 according to the processing result.

[0069] ​For example, the processor 140 can have a preset program inside, and the staff can input known parameters (e.g., the water storage inner diameter of the cold storage tank 200, the water storage height, the outlet water temperature of the cold storage tank 200, etc.) in advance. When the measured data is input into the processor 140, the processor 140 can bring the measured data and the known parameters into the specified calculation formula to calculate the real-time cold storage amount of the cold storage tank 200, and then compare the real-time cold storage amount of the cold storage tank 200 with the rated cold amount of the cold storage tank 200 to determine whether the cold amount of the cold storage tank 200 is sufficient. For example, when the real-time cold storage amount of the cold storage tank 200 is less than 20% of the rated cold amount, it means that the cold amount of the cold storage tank 200 is about to be exhausted, and at this time the processor 140 can issue an alarm sound to remind the staff to perform cooling treatment on the cooling liquid in the cold storage tank 200 or replace a new cold storage tank 200, so that the air conditioning system can operate normally.

[0070] The rated cold amount of the cold storage tank 200 refers to the cold amount that can be provided after all the cold amount in the cold storage tank 200 is released. In other words, the rated cold amount of the cold storage tank 200 can be understood as the total cold amount that can be provided for the air conditioning system when the cooling liquid in the cold storage tank 200 is circulated and heated through the air conditioning system.

[0071] By distributing the plurality of first temperature sensors 110 along the axial direction of the cold storage tank 200, the first temperature sensors 110 can measure the temperature of the cooling liquid at each part of the cold storage tank 200, so that the processor 140 can calculate the real-time cold storage amount of the cold storage tank 200 in combination with the temperature values of the plurality of first temperature sensors 110, the outlet water flow of the cold storage tank 200, and the return water temperature of the cold storage tank 200. By comparing the real-time cold storage amount of the cold storage tank 200 with the rated cold amount, the cold amount of the cold storage tank 200 can be effectively monitored. In this way, the staff can respond in time according to the monitoring, which can effectively avoid the cold storage tank 200 providing the cooling liquid that has been heated to the air conditioning system, and avoid the influence of the cold storage tank 200 providing the cooling liquid that has been heated to the air conditioning system on the normal cooling of the data center by the air conditioning system, thereby effectively improving the stability and reliability of the air conditioning system for cooling the data center, and improving the stability of the operation of the data center.

[0072] Continuing to refer to Figure 2 As shown in the figure, the cold storage tank cold amount monitoring device 100 can further include a collector 150, which can be electrically connected with the processor 140, and the collector 150 can also be electrically connected with a load device (e.g., an air conditioning system) cooled by the cold storage tank 200. The collector 150 can be used to collect the load amount of the load device and transmit the collected load amount to the processor 140, so that the processor 140 can calculate the remaining cooling duration of the cold storage tank 200 in combination with the load amount of the load device.

[0073] For example, after calculating the real-time cold storage amount of the cold storage tank 200, the processor 140 can calculate the load amount of the load device to calculate the remaining cooling time of the cold storage tank 200. For example, when the processor 140 judges that the real-time cold storage amount in the cold storage tank 200 is less than 20% of the rated cold amount and issues an alarm, at this time, the processor 140 can also provide the remaining cooling time of the cold storage tank 200 to the staff, so that the staff can respond in time according to the remaining cooling time, thereby ensuring the normal operation of the air conditioning system (i.e. the load device).

[0074] Continuing to refer to Figure 2 As shown, the cold storage tank cold amount monitoring device 100 can also include a controller 160, the output end of the controller 160 can be electrically connected with the processor 140, and the input end of the controller 160 can be electrically connected with the plurality of first temperature sensors 110, the flow meter 120, the second temperature sensor 130 and the collector 150 respectively. The controller 160 can control the first temperature sensor 110, the flow meter 120 and the second temperature sensor 130, so that the first temperature sensor 110, the flow meter 120 and the second temperature sensor 130 transmit data to the processor 140 at a preset time point through the controller 160.

[0075] For example, the controller 160 can make the plurality of first temperature sensors 110 transmit the measured temperature value to the processor 140 once every preset time interval, so that the processor 140 can determine the position where the temperature of the cold storage tank 200 changes according to the temperature difference before and after the time interval. According to the position where the temperature of the cold storage tank 200 changes, it can be judged that the temperature of the cooling liquid between the position and the top wall of the cold storage tank 200 is all raised, while the temperature of the cooling liquid between the position and the bottom wall of the cold storage tank 200 is relatively low (i.e. has cold amount). At this time, the cold amount between the position where the temperature of the cold storage tank 200 changes and the bottom wall of the cold storage tank 200 can represent the real-time cold storage amount of the cold storage tank 200, so that the processor 140 can compare the real-time cold storage amount of the cold storage tank 200 with the rated cold amount to determine whether the real-time cold storage amount of the cold storage tank 200 reaches a critical value.

[0076] Continuing to refer to Figure 2 As shown, the cold storage tank cold amount monitoring device 100 can also include a switch 170, the input end of the switch 170 can be electrically connected with the output end of the controller 160 and the collector 150 respectively, and the output end of the switch 170 can be electrically connected with the processor 140. The switch 170 can be used to transmit the data of the controller 160 and the collector 150 to the processor 140, and the switch 170 can sort the data to be transmitted to the processor 140 uniformly, so that the plurality of input ends for receiving the respective data in the processor 140 can be omitted, which is beneficial to simplify the structure of the processor 140.

[0077] With reference to Figure 2 As shown in the figure, the cold storage tank coldness monitoring device 100 can further include a terminal device 180, which can be electrically connected with the output end of the processor 140, so that the processor 140 can transmit the processing result to the terminal device 180 and display it on the terminal device 180. For example, the terminal device 180 can be a computer, a desktop computer or other device with display function. The processor 140 can transmit the processing result (for example, the real-time cold storage amount of the cold storage tank 200, the size relationship between the cold storage tank 200 and the rated cold amount, and the remaining cooling time of the cold storage tank 200, etc.) to the terminal device 180 and display it on the display screen of the terminal device 180, so as to facilitate the staff to check, which can effectively improve the intuitiveness of the cold storage tank coldness monitoring device 100 and improve the user experience.

[0078] Figure 3 A flow chart of a cold storage tank coldness monitoring method provided by the embodiment of the present application.

[0079] The embodiment of the present application also provides a cold storage tank coldness monitoring method, which can monitor the coldness of the cold storage tank 200 by using the above-mentioned cold storage tank coldness monitoring device 100. With reference to Figure 3 As shown in the figure, the method can include:

[0080] S101: input the water storage height, water storage radius, preset outlet water temperature and preset return water temperature of the cold storage tank 200 in the processor 140, so that the processor 140 can calculate the rated cold amount of the cold storage tank 200 according to the first calculation formula.

[0081] For example, the staff can input the water storage height and water storage radius of the cold storage tank 200 in the processor 140 according to the actual size specifications of the cold storage tank 200. The preset outlet water temperature and preset return water temperature can be input with relatively reasonable values according to experience, so that the processor 140 can calculate the rated cold amount of the cold storage tank 200 according to the calculation formula, that is, the maximum cold amount that can be released after the cooling liquid in the cold storage tank 200 is fully warmed up.

[0082] S102: the processor 140 reads the outlet water flow and real-time return water temperature of the cold storage tank 200.

[0083] For example, the outlet water flow of the cold storage tank 200 can be read by the flow meter 120, and the real-time return water temperature of the cold storage tank 200 can be read by the second temperature sensor 130.

[0084] S103: The first temperature sensor 110 transmits the measured temperature value to the processor 140 every preset time interval, so that the processor 140 determines the first temperature sensor 110 whose temperature value changes before and after the preset time interval according to the first determination formula, and records the number corresponding to the first temperature sensor 110 whose temperature value changes.

[0085] For example, the first temperature sensor 110 can be controlled by the controller 160 to transmit the measured temperature value to the processor 140 every preset time interval, so that the processor 140 can determine the temperature change of the cooling liquid in the cold storage tank 200 according to the temperature value change of each first temperature sensor 110.

[0086] S104: The processor 140 calculates the temperature change rate of the cold storage tank 200 according to the second calculation formula.

[0087] For example, the temperature change rate of the cooling liquid in the cold storage tank 200 can be inferred from the water outlet flow rate of the cold storage tank 200 and the cross-sectional area of the cold storage tank 200.

[0088] S105: The processor 140 calculates the temperature change layer of the cold storage tank 200 by bringing the temperature change rate calculated in S104 into the third calculation formula. According to the temperature change rate of the cooling liquid and the preset time interval, the specific position of the temperature change in the cold storage tank 200 can be calculated.

[0089] S106: The processor 140 calculates the real-time cold storage capacity of the cold storage tank 200 by bringing the real-time return water temperature of the cold storage tank 200 and the temperature change layer into the fourth calculation formula. By substituting the above values into the fourth calculation formula, the real-time cold storage capacity of the cold storage tank 200 at the current time can be calculated for use in subsequent calculation processes.

[0090] S107: The real-time cold storage capacity of the cold storage tank 200 and the rated cold capacity of the cold storage tank 200 are brought into the second determination formula to determine whether the cold storage tank 200 needs to be supplemented with cold capacity.

[0091] By comparing the real-time cold storage capacity of the cold storage tank 200 with the rated cold capacity of the cold storage tank 200, i.e., comparing the total releasable cold capacity of the cold storage tank 200 with the current remaining cold capacity, the cold capacity condition in the cold storage tank 200 can be determined to enable the staff to respond. For example, when the current cold storage capacity of the cold storage tank 200 is less than 20% of the rated cold capacity of the cold storage tank 200, it indicates that the remaining cold capacity in the cold storage tank 200 is small, and at this time, the processor 140 can issue an alarm sound to remind the staff to supplement the cold capacity in time.

[0092] In the embodiment of the present application, the first calculation formula in S101 can be: Q0=CxpX R 2 x Hx (Th1-Tg).

[0093] Wherein, Q0 is the rated cooling capacity of the cold storage tank 200, C is the specific heat capacity of the cooling liquid, for example, the specific heat capacity of water, p is the density of the cooling liquid, for example, the density of water, R is the water storage radius of the cold storage tank 200, H is the water storage height of the cold storage tank 200, Th1 is the preset return water temperature of the cold storage tank 200, and Tg is the preset outlet water temperature of the cold storage tank 200.

[0094] The first calculation formula is the heat release formula of the object, that is, the heat released by the temperature change of the object is the specific heat capacity multiplied by the mass and then multiplied by the temperature difference. By substituting the above parameters into the first calculation formula, the total cooling capacity that can be released by the cold storage tank 200 under the relatively ideal state can be calculated.

[0095] It should be noted that the above-mentioned relatively ideal state refers to that the temperature of the cooling liquid flowing out of the cold storage tank 200 is close to the preset outlet water temperature Tg, and the temperature of the cooling liquid flowing back into the cold storage tank 200 is close to the preset return water temperature Th1, and the cooling capacity in the cold storage tank is well utilized. In the actual working process, due to process deviation, the actual outlet water temperature and the actual return water temperature of the cold storage tank 200 are allowed to deviate from the preset outlet water temperature Tg and the preset return water temperature Th1, and the deviation will not affect the monitoring accuracy of the entire cold storage tank cooling capacity monitoring device 100.

[0096] Wherein, the first judgment formula in S103 can be: T t+b -T t > 0.5℃.

[0097] Wherein, b is a preset time interval, for example, the time interval can be selected and set according to specific scene requirements, T t+b is the temperature value of the first temperature sensor 110 after the preset time interval, and T tThe temperature value of the first temperature sensor 110 before the preset time interval. By comparing each first temperature sensor 110 before and after the preset time interval, when the difference between the temperature value before the preset time interval and the temperature value after the preset time interval is greater than or equal to 0.5°C, it indicates that the cooling liquid temperature in the position corresponding to the first temperature sensor 110 rises, that is, the cooling liquid between the first temperature sensor 110 and the top wall of the cold storage tank 200 is fully warmed up and cannot continue to provide cold, while the cooling liquid temperature between the first temperature sensor 110 and the bottom wall of the cold storage tank 200 has not changed, and this part of the cooling liquid can continue to provide cold. Therefore, when calculating the real-time cold storage capacity of the cold storage tank 200 subsequently, only the cold corresponding to the part between the first temperature sensor 110 whose temperature has changed and the bottom wall of the cold storage tank 200 can be calculated.

[0098] The second calculation formula in S104 step can be: V=G / πR 2 . Wherein, V is the temperature change speed of the cold storage tank 200, G is the water outlet flow of the cold storage tank 200, πR 2 is the cross-sectional area of the cold storage tank 200. Dividing the water outlet flow by the cross-sectional area of the cold storage tank 200 can obtain the temperature change speed of the cold storage tank 200.

[0099] The third calculation formula in S105 step can be: Δh=V×b; wherein, Δh is the temperature change layer of the cold storage tank 200, that is, the position where the temperature of the cold storage tank 200 changes, in other words, the temperature change layer can be understood as the junction of the low-temperature cooling liquid and the warmed cooling liquid in the cold storage tank 200, V is the temperature change speed of the cold storage tank 200 calculated in S104 step, and b is the preset time interval.

[0100] The fourth calculation formula in S106 step can be: ∑Q=C×ρ×π×R 2 {a(Th2-Ti1)+l(Th2-Ti2)+l(Th2-Ti3)+……+(l-Δh)(Th2-Ti m )};

[0101] Wherein, ∑Q is the real-time cold storage capacity of the cold storage tank 200, that is, ∑Q is the current remaining cold of the cold storage tank 200, C is the specific heat capacity of the cooling liquid, ρ is the density of the cooling liquid, R is the water storage radius of the cold storage tank 200, Th2 is the real-time return water temperature of the cold storage tank 200, for example, Th2 can be the value measured by the second temperature sensor 130, along the axial direction of the cold storage tank 200, from the bottom wall of the cold storage tank 200 to the top wall of the cold storage tank 200, Ti1 is the temperature value of the first first temperature sensor 110, Ti2 is the temperature value of the second first temperature sensor 110, Ti3 is the temperature value of the third first temperature sensor 110, and Ti mT is the temperature value of the first temperature sensor 110, a is the distance between the first temperature sensor 110 and the bottom wall of the cold storage tank 200, and l is the interval distance between any two adjacent first temperature sensors 110 along the axial direction of the cold storage tank 200.

[0102] The above formula is to calculate the cold quantity of each segment by taking each first temperature sensor 110 as a boundary point to segment the cold storage tank 200 along the axial direction, and then to add up the cold quantity of each segment to obtain the real-time cold storage quantity of the cold storage tank 200 as a whole.

[0103] The second judgment formula in the S107 step can be ∑Q / Q0<20%, wherein when the real-time cold storage quantity of the cold storage tank 200 and the rated cold quantity of the cold storage tank 200 satisfy the second judgment formula, that is, the residual cold quantity of the cold storage tank 200 is less than 20% of the total cold quantity that can be released by the cold storage tank 200, it is indicated that the cold storage tank 200 needs to be supplemented with cold quantity. At this time, the processor 140 can issue an alarm to remind the staff to supplement the cold quantity in time.

[0104] In the embodiment of the present application, the monitoring method further includes that the processor 140 reads the load quantity of the load device (for example, an air conditioning system) supplied with cold by the cold storage tank 200, and brings the load quantity of the load device and the real-time cold storage quantity of the cold storage tank 200 into a fifth calculation formula to calculate the cold supply duration of the cold storage tank 200. For example, when the processor 140 issues an alarm sound to prompt the staff to supplement the cold quantity, at this time, the duration that the residual cold quantity of the cold storage tank 200 can be supplied with cold can also be displayed on the terminal device 180, so that the staff can supplement the cold quantity according to the residual cold supply duration.

[0105] The fifth calculation formula can be T=∑Q / P, wherein T is the cold supply duration of the cold storage tank 200, and P is the load quantity of the load device, wherein the load quantity of the load device can be understood as the power of the load device. The above formula is to divide the residual cold quantity of the cold storage tank 200 by the load quantity of the load device, so as to calculate the cold supply duration of the cold storage tank 200, thereby enabling the staff to more intuitively know the actual cold supply situation of the cold storage tank 200.

[0106] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" 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 convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying 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 on the present application.

[0107] In the description of the application, it is to be understood that the terms "including" and "having" and any variations thereof used herein are intended to cover a non-exclusive inclusion, for example, a process, method, system, product or apparatus that includes a list of steps or units need not necessarily be limited to those clearly listed, but can include other steps or units that are not clearly listed or inherent to such processes, methods, products or apparatus.

[0108] Unless otherwise clearly specified and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or can be integrated; can be directly connected, or can be indirectly connected through an intermediate medium; can be connected inside two elements or the interaction relationship between two elements. 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. In addition, the terms "first", "second" and the like are only for the purpose of description, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated.

[0109] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A cold storage tank cold capacity monitoring device, used to monitor the cold storage capacity of the cold storage tank, characterized in that, It includes multiple first temperature sensors, which are located on the cold storage tank and are evenly distributed along the axial direction of the cold storage tank. The first temperature sensors are used to measure the temperature of the coolant in the cold storage tank corresponding to the first temperature sensor. It also includes a flow meter and a second temperature sensor. The flow meter is installed at the outlet of the cold storage tank and is used to measure the outflow rate of the cold storage tank. The second temperature sensor is installed at the return port of the cold storage tank and is used to measure the return temperature of the cold storage tank. It also includes a processor, which is electrically connected to a plurality of first temperature sensors, a flow meter and a second temperature sensor, so that the first temperature sensors, the flow meter and the second temperature sensor transmit the measured data to the processor. The processor is used to process the data measured by the plurality of first temperature sensors, the flow meter and the second temperature sensor, and monitor the cold storage capacity of the cold storage tank according to the processing results. The processor is configured as follows: The system receives temperature values ​​transmitted by the first temperature sensor at preset time intervals and determines, according to a first judgment formula, whether the temperature value of the first temperature sensor changes before and after the preset time interval. Based on the outflow rate and the cross-sectional area of ​​the cold storage tank, the rate of temperature change of the cold storage tank is calculated using the second calculation formula; The temperature change layer of the cold storage tank is calculated using a third calculation formula based on the temperature change rate and the preset time interval. The return water temperature, the temperature change layer, and the temperature value of the first temperature sensor that caused the temperature change are substituted into the fourth calculation formula to calculate the real-time cold storage capacity of the cold storage tank. The real-time cold storage capacity is compared with the rated cold storage capacity of the cold storage tank, and the cold storage tank is judged to need to be replenished based on the comparison result.

2. The cold storage tank cooling capacity monitoring device according to claim 1, characterized in that, It also includes a collector, which is electrically connected to the processor and is also electrically connected to a load device that is cooled by the cold storage tank; The data collector is used to collect the load of the load device and transmit the collected load to the processor so that the processor can calculate the remaining cooling time of the cold storage tank based on the load.

3. The cold storage tank cooling capacity monitoring device according to claim 2, characterized in that, It also includes a controller, the output of which is electrically connected to the processor, and the input of which is electrically connected to a plurality of the first temperature sensors, the flow meter, the second temperature sensor and the data collector, respectively. The controller is used to control a plurality of first temperature sensors, flow meters and second temperature sensors, so that the plurality of first temperature sensors, flow meters and second temperature sensors transmit data to the processor through the controller at a preset time point.

4. The cold storage tank cooling capacity monitoring device according to claim 3, characterized in that, It also includes a switch, the input terminals of which are electrically connected to the output terminals of the controller and the data collector, respectively, and the output terminals of the switch are electrically connected to the processor; The switch is used to transmit data from the controller and the collector to the processor.

5. The cold storage tank cooling capacity monitoring device according to any one of claims 1 to 4, characterized in that, It also includes a terminal device, which is electrically connected to the output of the processor so that the processor can transmit the processing result to the terminal device and display it on the terminal device.

6. The cold storage tank cooling capacity monitoring device according to claim 5, characterized in that, The height of the first temperature sensor located near the bottom wall of the cold storage tank is equal to the height of the outlet of the cold storage tank, and the height of the first temperature sensor located near the top wall of the cold storage tank is equal to the height of the return outlet of the cold storage tank. In the axial direction of the cold storage tank, the spacing between any two adjacent first temperature sensors is equal.

7. A method for monitoring the cooling capacity of a cold storage tank, comprising using the cold storage tank cooling capacity monitoring device according to any one of claims 1 to 6 to monitor the cooling capacity of the cold storage tank, characterized in that, The method includes: Input the water storage height, water storage radius, preset outlet water temperature and preset return water temperature of the cold storage tank into the processor so that the processor can calculate the rated cooling capacity of the cold storage tank according to the first calculation formula; The processor reads the outflow rate and real-time return water temperature of the cold storage tank; The first temperature sensor transmits a measured temperature value to the processor at a preset time interval, so that the processor can determine the first temperature sensor whose temperature value changes before and after the preset time interval according to the first judgment formula, and record the number corresponding to the first temperature sensor whose temperature value changes. The processor calculates the rate of temperature change of the cold storage tank according to the second calculation formula; The processor inputs the temperature change rate into a third calculation formula to calculate the temperature change layer of the cold storage tank; The processor inputs the real-time return water temperature and the temperature change layer into the fourth calculation formula to calculate the real-time cold storage capacity of the cold storage tank. The real-time cold storage capacity and the rated cold storage capacity of the cold storage tank are substituted into the second judgment formula to determine whether the cold storage tank needs to be replenished.

8. The method for monitoring the cooling capacity of a cold storage tank according to claim 7, characterized in that, The first calculation formula is: ; Wherein, Q0 is the rated cooling capacity of the cold storage tank, C is the specific heat capacity of the coolant, ρ is the density of the coolant, R is the water storage radius of the cold storage tank, H is the water storage height of the cold storage tank, Th1 is the preset return water temperature of the cold storage tank, and Tg is the preset outlet water temperature of the cold storage tank.

9. The method for monitoring the cooling capacity of a cold storage tank according to claim 7, characterized in that, The first judgment formula is: ; Where b is the preset time interval, T t+b T represents the temperature value of the first temperature sensor after the preset time interval. t The temperature value of the first temperature sensor before the preset time interval.

10. The method for monitoring the cooling capacity of a cold storage tank according to claim 7, characterized in that, The second calculation formula is: ; Wherein, V is the rate of temperature change of the cold storage tank, and G is the outflow rate of the cold storage tank.

11. The method for monitoring the cooling capacity of a cold storage tank according to claim 7, characterized in that, The third calculation formula is: ; in, V represents the temperature change layer of the cold storage tank, V represents the temperature change rate of the cold storage tank, and b represents the preset time interval.

12. The method for monitoring the cooling capacity of a cold storage tank according to claim 7, characterized in that, The fourth calculation formula is: ; Where ∑Q is the real-time cold storage capacity of the cold storage tank, C is the specific heat capacity of the coolant, ρ is the density of the coolant, R is the water storage radius of the cold storage tank, Th2 is the real-time return water temperature of the cold storage tank, along the axial direction of the cold storage tank, from the bottom wall to the top wall of the cold storage tank, Ti1 is the temperature value of the first first temperature sensor, Ti2 is the temperature value of the second first temperature sensor, Ti3 is the temperature value of the third first temperature sensor, and Ti... m denoted as the temperature value of the first temperature sensor when the temperature value changes, 'a' is the distance between the first first temperature sensor and the bottom wall of the cold storage tank, and 'l' is the axial spacing between any two adjacent first temperature sensors.

13. The method for monitoring the cooling capacity of a cold storage tank according to claim 7, characterized in that, The second judgment formula is: Wherein, when the real-time cold storage capacity of the cold storage tank and the rated cold storage capacity of the cold storage tank satisfy the second judgment formula, it means that the cold storage tank needs to be replenished with cold energy.

14. The method for monitoring the cooling capacity of a cold storage tank according to claim 7, characterized in that, The method further includes: The processor reads the load of the load device being cooled by the cold storage tank, and inputs the load of the load device and the real-time cold storage capacity of the cold storage tank into the fifth calculation formula to calculate the cooling duration of the cold storage tank.

15. The method for monitoring the cooling capacity of a cold storage tank according to claim 14, characterized in that, The fifth calculation formula is: Where T is the available cooling time of the cold storage tank, and P is the load capacity of the load device.

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