Cooling unit control method and device, cooling unit, storage medium and electronic equipment

Abstract

The invention provides a control method and device of a cooling unit, the cooling unit, a storage medium and electronic device.The method comprises the steps that the first liquid supply temperature and the first liquid return temperature of cooling liquid of the cooling unit are detected according to a first period, and the cooling unit comprises a plurality of refrigeration modules; each refrigeration module is connected in parallel with a circulating pipeline of cooling liquid; calculating a liquid supply temperature change rate according to the first liquid supply temperature, and calculating a liquid return temperature change rate according to the first liquid return temperature; and according to the liquid supply temperature change rate and the liquid return temperature change rate, operation parameters of the multiple refrigeration modules are controlled. The technical problem that the refrigeration module is frequently started and stopped due to large fluctuation of the thermal load of the cooling unit in the related technology is solved, and the stability of the cooling unit is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning, in particular to a cooling unit control method and device, a cooling unit, a storage medium and an electronic device. BACKGROUND

[0002] In related technologies, in order to improve the flexibility and efficiency of the system, the number and configuration of modules can be adjusted according to actual needs, and part of the cooling unit used for cooling heat generating equipment adopts a design scheme of integrating multiple same refrigeration modules. In actual operation, since the heat generating equipment may be in an intermittent working state or randomly switch the working mode, the thermal load is in a random change state, the refrigeration capacity and the thermal load are not matched, and the supply liquid temperature may fluctuate greatly and the refrigeration module may frequently start and stop, affecting the stability of the equipment and the user experience.

[0003] In view of the above problems existing in the related art, no efficient and accurate solution has been found. SUMMARY

[0004] The present application provides a cooling unit control method and device, a cooling unit, a storage medium and an electronic device to solve the technical problem of frequent start and stop of refrigeration modules caused by large fluctuations in thermal load of the cooling unit in related technologies.

[0005] According to one embodiment of the present application, a cooling unit control method is provided, comprising: detecting a first supply liquid temperature and a first return liquid temperature of a cooling liquid of a cooling unit according to a first period, wherein the cooling unit comprises a plurality of refrigeration modules, each of which is connected in parallel to a circulating pipeline of the cooling liquid; calculating a supply liquid temperature change rate according to the first supply liquid temperature and a return liquid temperature change rate according to the first return liquid temperature; and controlling the operating parameters of the plurality of refrigeration modules according to the supply liquid temperature change rate and the return liquid temperature change rate.

[0006] Optionally, calculating the supply liquid temperature change rate according to the first supply liquid temperature comprises: obtaining a plurality of groups of first supply liquid temperatures detected in a plurality of first periods in succession; fitting a supply liquid temperature curve using the plurality of groups of first supply liquid temperatures, wherein the supply liquid temperature curve is used to represent the change relationship between the first supply liquid temperature and time; solving a polynomial function of the supply liquid temperature curve; and deriving the supply liquid temperature change rate by taking the derivative of the polynomial function with respect to time.

[0007] Optionally, controlling the operating parameters of the plurality of refrigeration modules according to the supply liquid temperature change rate and the return liquid temperature change rate comprises: respectively judging whether the supply liquid temperature change rate and the return liquid temperature change rate are greater than 0 to obtain a judgment result; and controlling the number of start of the plurality of refrigeration modules and the operating frequency of the compressor according to the judgment result.

[0008] Optionally, the controlling the number of the first refrigeration modules and the operating frequency of the compressor according to the judging result comprises: if the liquid supply temperature variation rate and the liquid return temperature variation rate are both greater than 0, increasing the real-time operating frequency of the compressor of the first refrigeration module; judging whether the adjusted real-time operating frequency reaches a highest operating frequency; if the adjusted real-time operating frequency reaches the highest operating frequency, increasing the number of the first refrigeration modules, wherein the plurality of refrigeration modules comprises the first refrigeration module and a second refrigeration module, the first refrigeration module is a refrigeration module in an open state, and the second refrigeration module is a refrigeration module in a closed state; if the liquid supply temperature variation rate and the liquid return temperature variation rate are both equal to 0, maintaining the number of the first refrigeration modules and the real-time operating frequency; if the liquid supply temperature variation rate and the liquid return temperature variation rate are both less than 0, decreasing the real-time operating frequency of the compressor of the first refrigeration module; judging whether the adjusted real-time operating frequency reaches a lowest operating frequency; and if the adjusted real-time operating frequency reaches the lowest operating frequency, decreasing the number of the first refrigeration modules.

[0009] Optionally, the increasing the real-time operating frequency of the compressor of the first refrigeration module comprises: comparing the liquid return temperature variation rate and the liquid supply temperature variation rate; if the liquid return temperature variation rate is greater than the liquid supply temperature variation rate, increasing the real-time operating frequency of the compressor of the first refrigeration module based on a first step; and if the liquid return temperature variation rate is less than the liquid supply temperature variation rate, increasing the real-time operating frequency of the compressor of the first refrigeration module based on a second step, wherein the first step is less than the second step; or the decreasing the real-time operating frequency of the compressor of the first refrigeration module comprises: comparing the liquid return temperature variation rate and the liquid supply temperature variation rate; if the liquid return temperature variation rate is greater than the liquid supply temperature variation rate, decreasing the real-time operating frequency of the compressor of the first refrigeration module based on a third step; and if the liquid return temperature variation rate is less than the liquid supply temperature variation rate, decreasing the real-time operating frequency of the compressor of the first refrigeration module based on a fourth step, wherein the third step is less than the fourth step.

[0010] Optionally, after the operating parameters of the plurality of refrigeration modules are controlled according to the liquid supply temperature variation rate and the liquid return temperature variation rate, the method further comprises: detecting a second liquid supply temperature of the cooling liquid of the cooling unit and obtaining a set temperature of the cooling unit according to a second period before a next first period, wherein the second period is less than the first period; calculating a first temperature difference between the second liquid supply temperature and the set temperature; if the first temperature difference is greater than a first preset temperature, increasing the operating frequency of the compressor of the first refrigeration module; if the first temperature difference is less than a second preset temperature, decreasing the operating frequency of the compressor of the first refrigeration module; and if the first temperature difference is between the first preset temperature and the second preset temperature, maintaining the operating frequency of the compressor of the first refrigeration module, wherein the first refrigeration module is a refrigeration module in an open state, and the first preset temperature is greater than the second preset temperature.

[0011] Optionally, before detecting the first supply liquid temperature and the first return liquid temperature of the cooling liquid of the cooling unit according to the first period, the method further comprises: starting a power supply of the cooling unit, detecting an initial supply liquid temperature and an initial return liquid temperature after the cooling liquid of the cooling unit completes a first circulation; calculating a second temperature difference of the initial return liquid temperature minus the initial supply liquid temperature; configuring an initial start number and an initial start frequency of the refrigeration module based on the second temperature difference, wherein the initial start number and the initial start frequency are both positively correlated with the second temperature difference.

[0012] Optionally, before detecting the first supply liquid temperature and the first return liquid temperature of the cooling liquid of the cooling unit according to the first period, the method further comprises: determining a total capacity, a specific heat capacity, and a temperature control precision of the cooling liquid, and determining a maximum heat load and a minimum heat load of a heat generating device, wherein the cooling unit is used to cool the heat generating device through the cooling liquid; calculating a cold storage capacity of the cooling unit according to the total capacity, the specific heat capacity, and the temperature control precision; calculating a first supply liquid temperature maintenance time length of the cooling unit when the refrigeration capacity is excessive according to the cold storage capacity and the minimum heat load, and calculating a second supply liquid temperature maintenance time length of the cooling unit when the refrigeration capacity is insufficient according to the cold storage capacity and the maximum heat load; selecting a minimum value of the first supply liquid temperature maintenance time length and the second supply liquid temperature maintenance time length as a period length of the first period.

[0013] According to another embodiment of the present application, a control device of a cooling unit is provided, comprising: a first detection module configured to detect a first supply liquid temperature and a first return liquid temperature of a cooling liquid of a cooling unit according to a first period, wherein the cooling unit comprises a plurality of refrigeration modules, each of which is connected in parallel to a circulating pipeline of the cooling liquid; a first calculation module configured to calculate a supply liquid temperature change rate according to the first supply liquid temperature, and calculate a return liquid temperature change rate according to the first return liquid temperature; and a first control module configured to control operating parameters of the plurality of refrigeration modules according to the supply liquid temperature change rate and the return liquid temperature change rate.

[0014] Optionally, the first calculation module comprises: an acquisition unit configured to acquire a plurality of groups of first supply liquid temperatures detected in a plurality of first periods in succession; a generation unit configured to generate a supply liquid temperature curve by fitting the plurality of groups of first supply liquid temperatures, wherein the supply liquid temperature curve is used to represent a change relationship between the first supply liquid temperature and time; a first calculation unit configured to solve a polynomial function of the supply liquid temperature curve; and a second calculation unit configured to derive the supply liquid temperature change rate by deriving the polynomial function with respect to time.

[0015] Optionally, the first control module comprises: a judging unit, configured to judge whether the liquid supply temperature change rate and the liquid return temperature change rate are greater than 0 respectively, and obtain a judging result; and a control unit, configured to control the number of the multiple refrigeration modules and the operating frequency of the compressor according to the judging result.

[0016] Optionally, the control unit comprises: a first control sub-unit, configured to increase the real-time operating frequency of the compressor of the first refrigeration module if the liquid supply temperature change rate and the liquid return temperature change rate are both greater than 0; judge whether the adjusted real-time operating frequency reaches a highest operating frequency; if the highest operating frequency is reached, increase the number of the first refrigeration modules, wherein the multiple refrigeration modules comprise the first refrigeration modules and second refrigeration modules, the first refrigeration modules are the refrigeration modules in an open state, and the second refrigeration modules are the refrigeration modules in a closed state; a second control sub-unit, configured to maintain the number of the first refrigeration modules and the real-time operating frequency if the liquid supply temperature change rate and the liquid return temperature change rate are both equal to 0; and a third control sub-unit, configured to decrease the real-time operating frequency of the compressor of the first refrigeration module if the liquid supply temperature change rate and the liquid return temperature change rate are both less than 0; judge whether the adjusted real-time operating frequency reaches a lowest operating frequency; and if the lowest operating frequency is reached, decrease the number of the first refrigeration modules.

[0017] Optionally, the first control sub-unit is further configured to: compare the liquid return temperature change rate and the liquid supply temperature change rate; if the liquid return temperature change rate is greater than the liquid supply temperature change rate, increase the real-time operating frequency of the compressor of the first refrigeration module based on a first step length; and if the liquid return temperature change rate is less than the liquid supply temperature change rate, increase the real-time operating frequency of the compressor of the first refrigeration module based on a second step length, wherein the first step length is less than the second step length; and the third control sub-unit is further configured to: compare the liquid return temperature change rate and the liquid supply temperature change rate; if the liquid return temperature change rate is greater than the liquid supply temperature change rate, decrease the real-time operating frequency of the compressor of the first refrigeration module based on a third step length; and if the liquid return temperature change rate is less than the liquid supply temperature change rate, decrease the real-time operating frequency of the compressor of the first refrigeration module based on a fourth step length, wherein the third step length is less than the fourth step length.

[0018] Optionally, the apparatus further comprises: a second detection module, configured to detect a second supply liquid temperature of the cooling liquid of the cooling unit and obtain a set temperature of the cooling unit according to a second period after the first control module controls the operation parameters of the plurality of refrigeration modules according to the supply liquid temperature change rate and the return liquid temperature change rate before a next first period arrives, wherein the second period is less than the first period; a second calculation module, configured to calculate a first temperature difference between the second supply liquid temperature and the set temperature; and a second control module, configured to increase the operation frequency of the first refrigeration module compressor if the first temperature difference is greater than a first preset temperature, decrease the operation frequency of the first refrigeration module compressor if the first temperature difference is less than a second preset temperature, and maintain the operation frequency of the first refrigeration module compressor if the first temperature difference is between the first preset temperature and the second preset temperature, wherein the first refrigeration module is a refrigeration module in an open state, and the first preset temperature is greater than the second preset temperature.

[0019] Optionally, the apparatus further comprises: a third detection module, configured to start a power supply of the cooling unit before the first detection module detects the first supply liquid temperature and the first return liquid temperature of the cooling liquid of the cooling unit according to the first period, and detect an initial supply liquid temperature and an initial return liquid temperature after the cooling liquid of the cooling unit completes a first circulation; a third calculation module, configured to calculate a second temperature difference between the initial return liquid temperature and the initial supply liquid temperature; and a configuration module, configured to configure an initial start number and an initial start frequency of the refrigeration modules based on the second temperature difference, wherein the initial start number and the initial start frequency are positively correlated with the second temperature difference.

[0020] Optionally, the apparatus further comprises: a determination module, configured to determine a total capacity, a specific heat capacity, and a temperature control accuracy of the cooling liquid, and determine a maximum heat load and a minimum heat load of a heat generating device before the first detection module detects the first supply liquid temperature and the first return liquid temperature of the cooling liquid of the cooling unit according to the first period, wherein the cooling unit is configured to cool the heat generating device through the cooling liquid; a fourth calculation module, configured to calculate a cold storage capacity of the cooling unit according to the total capacity, the specific heat capacity, and the temperature control accuracy; a fifth calculation module, configured to calculate a first supply liquid temperature maintenance duration of the cooling unit when the refrigeration capacity is excessive according to the cold storage capacity and the minimum heat load, and calculate a second supply liquid temperature maintenance duration of the cooling unit when the refrigeration capacity is insufficient according to the cold storage capacity and the maximum heat load; and a selection module, configured to select a minimum value of the first supply liquid temperature maintenance duration and the second supply liquid temperature maintenance duration as a period duration of the first period.

[0021] According to another embodiment of the present application, a cooling unit is provided, comprising a plurality of refrigeration modules and a controller, wherein the controller comprises the control device of the cooling unit as described in the above embodiments.

[0022] According to another aspect of the embodiments of the present application, a storage medium is also provided, which comprises a stored program, and the program performs the above steps when running.

[0023] According to another aspect of the embodiments of the present application, an electronic device is also provided, which comprises a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory complete mutual communication through the communication bus; wherein: the memory is used to store a computer program; the processor is used to perform the steps in the above method by running the program stored in the memory.

[0024] According to another aspect of the embodiments of the present application, a storage medium is also provided, which comprises a stored program, and the program performs the steps in any of the above device embodiments when running.

[0025] According to the embodiments of the present application, the first supply liquid temperature and the first return liquid temperature of the cooling liquid of the cooling unit are detected according to a first period, wherein the cooling unit comprises a plurality of refrigeration modules, and each refrigeration module is connected in parallel to the circulating pipeline of the cooling liquid; the supply liquid temperature change rate is calculated according to the first supply liquid temperature, and the return liquid temperature change rate is calculated according to the first return liquid temperature; and the operation parameters of the plurality of refrigeration modules are controlled according to the supply liquid temperature change rate and the return liquid temperature change rate. By calculating the supply liquid temperature change rate and the return liquid temperature change rate of the cooling liquid of the cooling unit, the change of the thermal load at the end of the cooling unit can be predicted in advance, the operation parameters of the plurality of refrigeration modules are responded and automatically adjusted, the refrigerating capacity of the cooling unit is controlled based on the change of the thermal load, the technical problem that the refrigeration modules are frequently started and stopped due to the large fluctuation of the thermal load of the cooling unit in the related art is solved, and the stability of the cooling unit is improved. BRIEF DESCRIPTION OF DRAWINGS

[0026] The accompanying drawings, which are included to provide a further understanding of the present application and are incorporated in and constitute a part of this application, illustrate embodiments of the present application and serve to explain the present application, and do not constitute improper limitations on the present application. In the drawings:

[0027] Figure 1 is a hardware structure block diagram of a cooling unit according to an embodiment of the present application;

[0028] Figure 2 is a flow chart of a control method of a cooling unit according to an embodiment of the present application;

[0029] Figure 3is a schematic diagram of a cooling unit in an embodiment of the present application;

[0030] Figure 4 is a structural block diagram of a control device of a cooling unit in an embodiment of the present application. DETAILED DESCRIPTION

[0031] In order to enable persons skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative work should fall within the scope of protection of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0032] It should be noted that the terms "first", "second", and the like in the specification and claims of the present application and the above-described drawings are used to distinguish similar objects, and do not necessarily indicate a specific order or a chronological sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, product, or device including a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to the process, method, product, or device.

[0033] Embodiment 1

[0034] The method embodiments provided in the embodiment of the present application can be executed in a cooling unit, an air conditioner, or a similar device management device. Taking a running cooling unit as an example, Figure 1 is a hardware structural block diagram of a cooling unit in an embodiment of the present application. As shown in Figure 1 , the cooling unit can include one or more (only one is shown in Figure 1 ) processors 102 (the processor 102 can include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data. Optionally, the above-mentioned cooling unit can further include a transmission device 106 for communication function and an input and output device 108. Those skilled in the art can understand that Figure 1 The structure shown is only schematic, which does not limit the structure of the above-mentioned cooling unit. For example, the cooling unit can further include more or fewer components than those shown in Figure 1 , or have a structure different from Figure 1Different configurations are shown.

[0035] The memory 104 can be used to store the chiller program, such as the software program of the application software and the modules, such as the chiller program corresponding to the control method of the chiller in the embodiment of the present application. The processor 102 executes various functional applications and data processing by running the chiller program stored in the memory 104, that is, implements the above-mentioned method. The memory 104 can include a high-speed random access memory, and can also include a non-volatile memory, such as one or more magnetic storage devices, flash memories, or other non-volatile solid-state memories. In some examples, the memory 104 can further include a memory remotely arranged with respect to the processor 102, and these remote memories can be connected to the chiller through a network. Examples of the above-mentioned network include but are not limited to the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0036] The transmission device 106 is used to receive or send data via a network. The specific examples of the above-mentioned network can include a wireless network provided by a communication provider of the chiller. In one example, the transmission device 106 includes a network adapter (NIC), which can be connected to other network devices through a base station so as to be able to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (RF) module, which is used to communicate with the Internet in a wireless manner.

[0037] In the embodiment, a control method of a chiller is provided, Figure 2 is a flow chart of the control method of the chiller according to the embodiment of the present application, as shown in the figure, the flow includes the following steps: Figure 2

[0038] In step S202, the first supply liquid temperature and the first return liquid temperature of the cooling liquid of the chiller are detected according to a first period, wherein the chiller includes a plurality of refrigeration modules, and each refrigeration module is connected in parallel to a circulating pipeline of the cooling liquid.

[0039] Optionally, the cooling liquid can be water, ethylene glycol, or other cooling medium.

[0040] Figure 3 is a schematic diagram of the chiller in the embodiment of the present application, including a plurality of refrigeration modules (refrigeration module 1, two temperature sensors, respectively used to collect the supply liquid temperature and the return liquid temperature of the cooling heat, the high-temperature cooling liquid returned from the heat load (heat generating device) is sent to a plurality of independent parallel refrigeration modules through a supply liquid pump, the cooling liquid flows through each refrigeration module for cooling, and then is collected into a main pipe to circulate the cooling liquid meeting the supply liquid temperature to the heat load. ​

[0041] Step S204, calculating a supply liquid temperature change rate according to the first supply liquid temperature, and calculating a return liquid temperature change rate according to the first return liquid temperature;

[0042] Step S206, controlling the operation parameters of the plurality of refrigeration modules according to the supply liquid temperature change rate and the return liquid temperature change rate.

[0043] Optionally, the refrigeration module of the embodiment includes a compressor for refrigeration, and the operation parameters of the refrigeration module include the start state of the refrigeration module, the operation frequency of the compressor and other parameters affecting the refrigerating capacity of the cooling unit.

[0044] Through the above steps, the first supply liquid temperature and the first return liquid temperature of the cooling liquid of the cooling unit are detected in a first cycle, wherein the cooling unit includes a plurality of refrigeration modules connected in parallel to the circulating pipeline of the cooling liquid; the supply liquid temperature change rate is calculated according to the first supply liquid temperature, and the return liquid temperature change rate is calculated according to the first return liquid temperature; the operation parameters of the plurality of refrigeration modules are controlled according to the supply liquid temperature change rate and the return liquid temperature change rate. By calculating the supply liquid temperature change rate and the return liquid temperature change rate of the cooling liquid of the cooling unit, the change of the thermal load at the end of the cooling unit can be predicted in advance, the operation parameters of the plurality of refrigeration modules are automatically adjusted in response, the refrigerating capacity of the cooling unit is controlled based on the change of the thermal load, and the technical problem that the refrigeration modules are frequently started and stopped due to the large fluctuation of the thermal load of the cooling unit in the related art is solved, and the stability of the cooling unit is improved.

[0045] In the embodiment, before the first supply liquid temperature and the first return liquid temperature of the cooling liquid of the cooling unit are detected in the first cycle, the method further includes: starting the power supply of the cooling unit; detecting an initial supply liquid temperature and an initial return liquid temperature after the cooling liquid of the cooling unit completes the first circulation; calculating a second temperature difference between the initial return liquid temperature and the initial supply liquid temperature; and configuring an initial start number and an initial start frequency of the refrigeration modules based on the second temperature difference, wherein the initial start number and the initial start frequency are positively correlated with the second temperature difference.

[0046] Configuring the initial start frequency of the refrigeration modules based on the second temperature difference includes: detecting an ambient temperature of the cooling unit, searching for a reference frequency (the reference frequency is positively correlated with the ambient temperature) matched with the ambient temperature based on a first preset mapping table; searching for a target proportion parameter (the proportion parameter is positively correlated with the ambient temperature) matched with the second temperature difference based on a second preset mapping table; and calculating the initial start frequency of the refrigeration modules by using the target proportion parameter and the reference frequency.

[0047] After the power supply of the cooling unit is initially started, the cooling unit water pump is started for a time t1 (t1 is the time for the cooling liquid to flow from the liquid supply port, pass through the heat load, and return to the liquid return port), the real-time supply liquid temperature T 供 and the real-time return liquid temperature T 回 are detected, and a second temperature difference ΔT (ΔT=T 回 -T 供 ) is calculated.

[0048] According to P 热负载 =c*m*ΔT, the heat dissipation of the heat load can be calculated, where c and m are the specific heat capacity and flow rate of the cooling liquid, respectively. Since the specific heat capacity and flow rate of the cooling liquid do not change much when the unit is running, the required refrigeration capacity of the heat load can be estimated by ΔT. The greater the second temperature difference, the greater the number of initially started refrigeration modules and the greater the power of the refrigeration modules (the greater the frequency of the compressor). Table 1 shows the number of initially started refrigeration modules and the initial start frequency of each refrigeration module determined in the embodiment. If the number of started refrigeration modules in Table 1 is not an integer, the number is rounded to an integer:

[0049] Table 1

[0050] ΔT Number of refrigeration modules turned on Initial start frequency of refrigeration modules 0 < ΔT < T i / 5]] n / 2 2 / 5*F i ]]> T i / 5≤ΔT<3 / 5*T i ]]> n / 2 4 / 5*F i ]]> 3 / 5*T i ≤ΔT<T i ]]> n 4 / 5*F i ]]> ΔT ≥ T i ]]> n F i ]]>

[0051] where T i , n, and F i are set values, n is the total number of refrigeration modules in the cooling unit, T i is the supply-return liquid temperature difference of the cooling unit when the unit is running at a rated flow rate to meet 100% of the heat load at different outdoor ambient temperature intervals, which is measured in advance through experiments; and F i is the operating frequency of the compressor when all the refrigeration modules of the cooling unit are started to meet 100% of the heat load at different ambient temperature intervals. Table 2 shows the correspondence between T i , F i , and the ambient temperature as follows:

[0052] Table 2

[0053]

[0054] In Table 2, as the ambient temperature T 环 gradually increases, the corresponding T i , F i , F maxi , and F mini also gradually increase.

[0055] According to the scheme of the embodiment, the current load is determined according to the supply-return liquid temperature difference detected after the cooling unit is initially started, and the initial start number and initial start frequency of the refrigeration modules are determined, thereby improving the stability of the cooling unit during the start-up stage.

[0056] In this embodiment, before detecting the first supply temperature and the first return temperature of the coolant in the cooling unit according to the first cycle, the method further includes: determining the total capacity, specific heat capacity, and temperature control accuracy of the coolant, and determining the maximum heat load and minimum heat load of the heat-generating equipment, wherein the cooling unit is used to cool the heat-generating equipment through the coolant; calculating the cold storage capacity of the cooling unit based on the total capacity, the specific heat capacity, and the temperature control accuracy; calculating the duration of maintaining the first supply temperature of the cooling unit when the cooling capacity is excessive based on the cold storage capacity and the minimum heat load, and calculating the duration of maintaining the second supply temperature of the cooling unit when the cooling capacity is insufficient based on the cold storage capacity and the maximum heat load; and selecting the minimum value between the duration of maintaining the first supply temperature and the duration of maintaining the second supply temperature as the cycle length of the first cycle.

[0057] In this embodiment, the cycle duration t3 of the first cycle is determined by the cooling capacity of the coolant system. Taking water as the coolant as an example, if the total capacity of the coolant is V, then the cooling capacity Q of the cooling unit is... 蓄冷 = Specific heat capacity × V × ΔT1, where ΔT1 is the control temperature accuracy of the cooling unit (e.g., 0.5℃), P 制冷 The rated cooling capacity of the cooling unit is given. The maximum heat load of the heat-generating equipment (heat load) is P1, and the minimum heat load is P2. When the cooling capacity is excessive, the cold storage capacity should at least ensure Q. 蓄冷 / (P 制冷 -P2) The change in liquid supply temperature within the time period is less than ΔT1; when the cooling capacity is insufficient, the cold storage capacity can at least ensure Q 蓄冷 / (P1-P 制冷 The change in liquid supply temperature within the specified time period is less than ΔT1. To ensure accurate data acquisition, the cycle duration t3 of the first cycle is taken as the smaller of the two values.

[0058] By employing the scheme of this embodiment, the cold storage capacity of the cooling unit is calculated, and then the duration of liquid supply temperature maintenance when the cooling capacity of the cooling unit is excessive or insufficient is calculated respectively. The smaller value of the first cycle duration is selected as the detection cycle and control cycle of the cooling unit. This can ensure that the cooling capacity of the cooling unit matches the range of heat load variation of the heat-generating equipment, avoid frequent adjustment and start-up / stop of the cooling module, and improve the reliability of important components such as the compressor.

[0059] In one embodiment of the present embodiment, calculating the supply liquid temperature change rate according to the first supply liquid temperature comprises: obtaining a plurality of groups of first supply liquid temperatures detected in a plurality of first periods in succession; fitting a supply liquid temperature curve using the plurality of groups of first supply liquid temperatures, wherein the supply liquid temperature curve is used to represent the change relationship between the first supply liquid temperature and time; solving a polynomial function of the supply liquid temperature curve; and deriving the polynomial function with respect to time to obtain the supply liquid temperature change rate.

[0060] The plurality of groups of first supply liquid temperatures comprise first supply liquid temperatures collected in a current period and first supply liquid temperatures collected in a historical period.

[0061] In another aspect, calculating the return liquid temperature change rate according to the first return liquid temperature comprises: obtaining a plurality of groups of first return liquid temperatures detected in a plurality of first periods in succession; fitting a return liquid temperature curve using the plurality of groups of first return liquid temperatures, wherein the return liquid temperature curve is used to represent the change relationship between the first return liquid temperature and time; solving a polynomial function of the return liquid temperature curve; and deriving the polynomial function with respect to time to obtain the return liquid temperature change rate.

[0062] After the refrigeration module is operated for a period of time at an initial quantity and frequency, every t3 time (first period), the real-time detected supply and return liquid temperatures are plotted into temperature curves and the function relationship between the temperature and time t is automatically calculated:

[0063] T 供 = a1t n + a2t n-1 + … + an t + a n ;

[0064] T 回 = b1t n + b2t n-1 + … + bn t + b n ;

[0065] Deriving T 供 , T 回 with respect to time t respectively, the change rates of T 供 , T 回 can be obtained:

[0066] d(T 供 ) / dt = na1t n-1 + (n-1)a2t n-2 + … + an n ;

[0067] d(T 回 ) / dt = nb1t n-1 + (n-1)b2t n-2 + … + bn n ;

[0068] According to the polynomial function T fitted from the supply liquid temperature change curve over time 供 and T 回 , a1-a n , b1-b n is the coefficient of each term, t n is n times of t, for example, the fitting function is T 供 = 3t 3 + 2t 2 +t+5, a1=3, a2=2, a3=1, a=5, n=3.

[0069] By adopting the scheme of the embodiment, the change trend of the supply liquid temperature over time can be obtained in real time by fitting the temperature curve and solving the supply liquid temperature change rate, the calculation accuracy of the supply liquid temperature change rate is improved, and the supply liquid temperature is pre-judged in advance.

[0070] In the embodiment, controlling the operation parameters of the plurality of refrigeration modules according to the supply liquid temperature change rate and the return liquid temperature change rate comprises: respectively judging whether the supply liquid temperature change rate and the return liquid temperature change rate are greater than 0 to obtain a judgment result; and controlling the number of start-ups of the plurality of refrigeration modules and the operation frequency of the compressor according to the judgment result.

[0071] The supply liquid temperature change rate and the return liquid temperature change rate can be greater than 0, less than 0, or equal to 0, for example, when the supply liquid temperature change rate is greater than 0, it indicates that the supply liquid temperature is increasing, otherwise, when the supply liquid temperature change rate is less than 0, it indicates that the supply liquid temperature is decreasing, and the supply liquid temperature change rate and the return liquid temperature change rate can reflect the change trend of the cooling unit terminal heat load.

[0072] By adopting the scheme of the embodiment, the heat load change trend can be pre-judged by judging the supply liquid temperature and the return liquid temperature change rate, the compressor operation frequency and the module operation number are automatically adjusted, so that the refrigerating capacity change trend of the cooling unit matches the heat load change trend, and the supply liquid temperature can be accurately controlled.

[0073] In one embodiment, the controlling the number of the first refrigeration modules and the operating frequency of the compressor according to the judging result comprises: increasing the real-time operating frequency of the compressor of the first refrigeration module if both the supply liquid temperature change rate and the return liquid temperature change rate are greater than 0; judging whether the adjusted real-time operating frequency reaches the highest operating frequency; increasing the number of the first refrigeration modules if the highest operating frequency is reached, wherein the plurality of refrigeration modules comprise the first refrigeration module and the second refrigeration module, the first refrigeration module is the refrigeration module in the open state, and the second refrigeration module is the refrigeration module in the closed state; maintaining the number of the first refrigeration modules and the real-time operating frequency if both the supply liquid temperature change rate and the return liquid temperature change rate are equal to 0; decreasing the real-time operating frequency of the compressor of the first refrigeration module if both the supply liquid temperature change rate and the return liquid temperature change rate are less than 0; judging whether the adjusted real-time operating frequency reaches the lowest operating frequency; and decreasing the number of the first refrigeration modules if the lowest operating frequency is reached.

[0074] In one aspect of the embodiment, the increasing the real-time operating frequency of the compressor of the first refrigeration module comprises: comparing the return liquid temperature change rate and the supply liquid temperature change rate; increasing the real-time operating frequency of the compressor of the first refrigeration module based on a first step if the return liquid temperature change rate is greater than the supply liquid temperature change rate; and increasing the real-time operating frequency of the compressor of the first refrigeration module based on a second step if the return liquid temperature change rate is less than the supply liquid temperature change rate, wherein the first step is less than the second step.

[0075] In another aspect of the embodiment, the decreasing the real-time operating frequency of the compressor of the first refrigeration module comprises: comparing the return liquid temperature change rate and the supply liquid temperature change rate; decreasing the real-time operating frequency of the compressor of the first refrigeration module based on a third step if the return liquid temperature change rate is greater than the supply liquid temperature change rate; and decreasing the real-time operating frequency of the compressor of the first refrigeration module based on a fourth step if the return liquid temperature change rate is less than the supply liquid temperature change rate, wherein the third step is less than the fourth step.

[0076] In each first period, the change of the heat load is pre-judged by comparing the current supply liquid temperature change rate d(T 供 ) / dt and the return liquid temperature change rate d(T 回 ) / dt, so that the compressor frequency is controlled in advance to make the refrigerating capacity match the heat load. The following scenarios are included:

[0077] 1) d(T 回 ) / dt ≥ d(T 供 ) / dt > 0, it is considered that the refrigerating capacity is less than the heat load at this moment, and the operating frequency of the compressor of the refrigeration module that has been started is increased by ΔF1, and if the operating frequency of the refrigeration module that has been started has reached the highest operating frequency Fmaxi Then activate one more cooling module, and then press F on all activated cooling modules. i run;

[0078] 2)d(T 供 ) / dt>d(T 回 When ) / dt>0, it is considered that the cooling capacity at that moment cannot be offset by the heat generated by the internal heat dissipation devices such as the liquid supply pump, and the cooling capacity is much less than the heat load. The operating frequency of the compressors of the activated refrigeration modules all increases by ΔF2. If the operating frequency of the activated refrigeration modules has reached F maxi Then activate one more cooling module, and then press F on all activated cooling modules. i Run, V1 < V2;

[0079] 3)d(T 供 ) / dt<d(T 回 If ) / dt < 0, then the cooling capacity is excessive compared to the heat load. The compressor frequency will be reduced according to the set frequency adjustment speed V1. If the operating frequency of the refrigeration module is already at F... mini Then, turn off one more cooling module and reduce the number of activated modules. Then, press F on all activated cooling modules. mini run;

[0080] 4)d(T 回 ) / dt<d(T 供 If ) / dt < 0, then the cooling capacity is significantly excessive compared to the heat load. The compressor frequency should be reduced according to the set frequency adjustment speed V2. If the refrigeration module is already running at a frequency of F... mini Then, turn off one more cooling module and reduce the number of activated modules. Then, press F on all activated cooling modules. mini run;

[0081] 5)d(T 供 ) / dt=d(T 回 If ) / dt=0, it is considered that the cooling capacity matches the heat load, and the current number and frequency of the cooling modules in operation are maintained.

[0082] In an exceptional scenario, such as d(T) 回 ) / dt>0 and d(T) 供 If d(T_return) / dt < 0, it is considered that the cooling unit or heat load has just been started and has not yet stabilized, or the operating parameters of the cooling unit or heat load are fluctuating abnormally. The cooling unit is determined to be in an abnormal state, and the current number and frequency of refrigeration modules are maintained until the abnormal state is exited. In another abnormal scenario, if d(T_return) / dt < 0 and d(T_supply) / dt > 0, there is no situation where the supply liquid temperature rises and the return liquid temperature falls during normal operation of the heat load and cooling unit, and the cooling unit can be shut down.

[0083] By adopting the scheme of the embodiment, when the liquid supply temperature change rate and the liquid return temperature change rate are both greater than 0, the number of started refrigeration modules and the frequency of the compressor are increased to improve the refrigeration capacity, and when the liquid supply temperature change rate and the liquid return temperature change rate are both less than 0, the number of started refrigeration modules and the frequency of the compressor are reduced to reduce the refrigeration capacity, so that the liquid supply temperature of the cooling unit is accurately controlled, and the effects of accurate temperature control and balance between the heat load and the refrigeration capacity are achieved.

[0084] By adopting the scheme of the embodiment, the liquid return temperature change rate and the liquid supply temperature change rate are compared, the frequency of the compressor of the refrigeration module is adjusted by a smaller step when the liquid return temperature change rate is greater than the liquid supply temperature change rate, and the frequency of the compressor of the refrigeration module is adjusted by a larger step when the liquid return temperature change rate is less than the liquid supply temperature change rate, so that the frequency adjustment capability of each refrigeration module is fully utilized, and the refrigeration module is prevented from being frequently started and stopped.

[0085] In an implementation scenario of the embodiment, after the operation parameters of the plurality of refrigeration modules are controlled according to the liquid supply temperature change rate and the liquid return temperature change rate, the following steps are further included: before the next first period arrives, a second liquid supply temperature of the cooling liquid of the cooling unit is detected according to a second period, and a set temperature of the cooling unit is obtained, wherein the second period is less than the first period; a first temperature difference between the second liquid supply temperature and the set temperature is calculated; if the first temperature difference is greater than a first preset temperature, the operation frequency of the compressor of the first refrigeration module is increased; if the first temperature difference is less than a second preset temperature, the operation frequency of the compressor of the first refrigeration module is reduced; and if the first temperature difference is between the first preset temperature and the second preset temperature, the operation frequency of the compressor of the first refrigeration module is maintained, wherein the first refrigeration module is a refrigeration module in the started state, and the first preset temperature is greater than the second preset temperature.

[0086] Optionally, the cycle time length of the first period includes cycle time lengths of a plurality of second periods, and the liquid supply temperature of the refrigeration unit can be further adjusted in precision in the second period. After each coarse adjustment is completed, the compressor frequency is adjusted according to the deviation between the liquid supply temperature T 供 and the set temperature T 设定 of the cooling unit within 0-t3, and the liquid supply temperature fluctuation is controlled within T 设定 ±△T1, wherein △T1 and -△T1 are the first preset temperature and the second preset temperature respectively, and the following scenarios are included:

[0087] 1) T 供 -T 设定 < -△T1, all the running compressors are reduced in frequency at a frequency adjustment speed V0; the frequency adjustment step V0 < V1 < V2;

[0088] 2) - ΔT1≤ T 供 - T 设定 ≤ ΔT1, all the running compressor frequencies remain unchanged;

[0089] 3) T 供 - T 设定 > ΔT1, all the running compressors increase the frequency according to the frequency adjustment speed V0.

[0090] By using the scheme of the embodiment, the running frequency of the refrigeration module compressor is further finely adjusted by using the supply liquid temperature and the set temperature within the time of each coarse adjustment cycle, and the accurate control of the supply liquid temperature is further realized.

[0091] The embodiment proposes a brand-new accurate temperature control scheme, which can automatically and accurately adjust the operation state of the cooling unit when the thermal load changes randomly. When the thermal load changes randomly, the refrigeration system can quickly respond to adjust the running number and the running frequency of the refrigeration module, and continuously and stably output the cooling liquid at a constant temperature. Before the refrigeration module is started, the current load is judged according to the detected supply-liquid temperature difference, and the initial start number and the initial frequency of the refrigeration module are determined. After the refrigeration module is started, the change of the thermal load is predicted in advance by comparing the detected supply liquid temperature and the return liquid temperature change rate, and the compressor running frequency and the module running number are automatically adjusted, so that the accurate control of the supply liquid temperature is realized.

[0092] The scheme of the embodiment solves the problem that when the thermal load of the refrigeration unit changes randomly, the cooling unit cannot respond in time, resulting in large fluctuation of the supply liquid temperature and frequent start and stop of the refrigeration module. The cooling unit of the embodiment can automatically adjust the running number of the refrigeration module and the running frequency of the compressor according to the change of the thermal load, so that the effect of accurate temperature control and meeting the refrigeration capacity demand of the thermal load is achieved. On the one hand, the compressor frequency and the start number can be automatically adjusted according to the thermal load, so that the accurate control of the supply liquid temperature is realized. On the other hand, the cold storage capacity of the liquid in the system can be fully utilized, so that the refrigeration module is not adjusted and started frequently, and the reliability of important devices such as the compressor is improved.

[0093] Through the description of the above embodiments, those skilled in the art can clearly understand that the method according to the above embodiments can be realized by means of software and a general hardware platform as required, and of course it can also be realized by hardware, but in many cases the former is a better embodiment. Based on such understanding, the technical solutions of the present application can be embodied in the form of a software product, which is stored in a storage medium (such as a ROM / RAM, a magnetic disk, an optical disk), and includes a plurality of instructions for causing a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the method described in each embodiment of the present application.

[0094] Embodiment 2

[0095] A control device of a cooling unit and a cooling unit are also provided in the present embodiment, which are used to implement the above-mentioned embodiments and preferred embodiments, and will not be described again. The term "module" as used below can be a combination of software and hardware that implements a predetermined function. Although the device described in the following embodiments is preferably implemented in software, implementation of hardware, or a combination of software and hardware, can also be conceived.

[0096] Figure 4 is a structural block diagram of a control device of a cooling unit according to an embodiment of the present application, as shown in the figure, comprising: Figure 4

[0097] A first detection module 41 is configured to detect a first supply liquid temperature and a first return liquid temperature of a cooling liquid of a cooling unit according to a first period, wherein the cooling unit comprises a plurality of refrigeration modules, each of which is connected in parallel to a circulating pipeline of the cooling liquid.

[0098] A first calculation module 42 is configured to calculate a supply liquid temperature change rate according to the first supply liquid temperature and a return liquid temperature change rate according to the first return liquid temperature.

[0099] A first control module 43 is configured to control operating parameters of the plurality of refrigeration modules according to the supply liquid temperature change rate and the return liquid temperature change rate.

[0100] Optionally, the first calculation module comprises: an acquisition unit configured to acquire a plurality of groups of first supply liquid temperatures detected in a plurality of first periods in succession; a generation unit configured to generate a supply liquid temperature curve by fitting the plurality of groups of first supply liquid temperatures, wherein the supply liquid temperature curve is used to represent a change relationship between the first supply liquid temperature and time; a first calculation unit configured to solve a polynomial function of the supply liquid temperature curve; and a second calculation unit configured to derive the polynomial function with respect to time to obtain the supply liquid temperature change rate.

[0101] Optionally, the first control module comprises: a judgment unit configured to judge whether the supply liquid temperature change rate and the return liquid temperature change rate are greater than 0 respectively to obtain a judgment result; and a control unit configured to control an opening number of the plurality of refrigeration modules and an operating frequency of a compressor according to the judgment result.

[0102] ​Optionally, the control unit comprises: a first control subunit, configured to increase the real-time running frequency of the first refrigeration module compressor if both the supply liquid temperature change rate and the return liquid temperature change rate are greater than 0; determine whether the adjusted real-time running frequency reaches the highest running frequency; if the highest running frequency is reached, increase the number of the first refrigeration modules, wherein the plurality of refrigeration modules comprises the first refrigeration modules and the second refrigeration modules, the first refrigeration modules are the refrigeration modules in the open state, and the second refrigeration modules are the refrigeration modules in the closed state; a second control subunit, configured to maintain the number of the first refrigeration modules and the real-time running frequency if both the supply liquid temperature change rate and the return liquid temperature change rate are equal to 0; and a third control subunit, configured to decrease the real-time running frequency of the first refrigeration module compressor if both the supply liquid temperature change rate and the return liquid temperature change rate are less than 0; determine whether the adjusted real-time running frequency reaches the lowest running frequency; and if the lowest running frequency is reached, decrease the number of the first refrigeration modules.

[0103] Optionally, the first control subunit is further configured to: compare the return liquid temperature change rate and the supply liquid temperature change rate; increase the real-time running frequency of the first refrigeration module compressor based on a first step if the return liquid temperature change rate is greater than the supply liquid temperature change rate; and increase the real-time running frequency of the first refrigeration module compressor based on a second step if the return liquid temperature change rate is less than the supply liquid temperature change rate, wherein the first step is less than the second step; and the third control subunit is further configured to: compare the return liquid temperature change rate and the supply liquid temperature change rate; decrease the real-time running frequency of the first refrigeration module compressor based on a third step if the return liquid temperature change rate is greater than the supply liquid temperature change rate; and decrease the real-time running frequency of the first refrigeration module compressor based on a fourth step if the return liquid temperature change rate is less than the supply liquid temperature change rate, wherein the third step is less than the fourth step.

[0104] Optionally, the device further comprises: a second detection module, configured to detect a second supply liquid temperature of the cooling liquid of the cooling unit according to a second period after the first control module controls the operation parameters of the plurality of refrigeration modules according to the supply liquid temperature change rate and the return liquid temperature change rate, and obtain a set temperature of the cooling unit, wherein the second period is less than the first period; a second calculation module, configured to calculate a first temperature difference between the second supply liquid temperature and the set temperature; and a second control module, configured to increase the operation frequency of the first refrigeration module compressor if the first temperature difference is greater than a first preset temperature, decrease the operation frequency of the first refrigeration module compressor if the first temperature difference is less than a second preset temperature, and maintain the operation frequency of the first refrigeration module compressor if the first temperature difference is between the first preset temperature and the second preset temperature, wherein the first refrigeration module is a refrigeration module in an open state, and the first preset temperature is greater than the second preset temperature.

[0105] Optionally, the device further comprises: a third detection module, configured to start a power supply of the cooling unit before the first detection module detects the first supply liquid temperature and the first return liquid temperature of the cooling liquid of the cooling unit according to the first period, and detect an initial supply liquid temperature and an initial return liquid temperature after the cooling liquid of the cooling unit completes a first circulation; a third calculation module, configured to calculate a second temperature difference between the initial return liquid temperature and the initial supply liquid temperature; and a configuration module, configured to configure an initial start number and an initial start frequency of the refrigeration modules based on the second temperature difference, wherein the initial start number and the initial start frequency are positively correlated with the second temperature difference.

[0106] Optionally, the device further comprises: a determination module, configured to determine a total capacity, a specific heat capacity, and a temperature control accuracy of the cooling liquid, and determine a maximum heat load and a minimum heat load of a heat generating device before the first detection module detects the first supply liquid temperature and the first return liquid temperature of the cooling liquid of the cooling unit according to the first period, wherein the cooling unit is used to cool the heat generating device through the cooling liquid; a fourth calculation module, configured to calculate a cold storage capacity of the cooling unit according to the total capacity, the specific heat capacity, and the temperature control accuracy; a fifth calculation module, configured to calculate a first supply liquid temperature maintenance time length of the cooling unit when the refrigeration capacity is excessive according to the cold storage capacity and the minimum heat load, and calculate a second supply liquid temperature maintenance time length of the cooling unit when the refrigeration capacity is insufficient according to the cold storage capacity and the maximum heat load; and a selection module, configured to select a minimum value of the first supply liquid temperature maintenance time length and the second supply liquid temperature maintenance time length as a period length of the first period.

[0107] The embodiment also provides a cooling unit, comprising a plurality of refrigeration modules and a controller, wherein the controller comprises the control device of the cooling unit.

[0108] It should be noted that the above modules can be implemented by software or hardware, and for the latter, the following implementation manners can be used, but are not limited thereto: the above modules are located in the same processor; or the above modules are located in different processors in any combination.

[0109] Embodiment 3

[0110] The embodiment of the present application also provides a storage medium, which stores a computer program, wherein the computer program is configured to execute the steps in any of the method embodiments when running.

[0111] Optionally, in the embodiment, the storage medium can be configured to store the computer program for execution.

[0112] S1, detecting a first supply liquid temperature and a first return liquid temperature of a cooling liquid of a cooling unit according to a first period, wherein the cooling unit comprises a plurality of refrigeration modules, and each refrigeration module is connected in parallel to a circulating pipeline of the cooling liquid;

[0113] S2, calculating a supply liquid temperature change rate according to the first supply liquid temperature and a return liquid temperature change rate according to the first return liquid temperature;

[0114] S3, controlling an operation parameter of the plurality of refrigeration modules according to the supply liquid temperature change rate and the return liquid temperature change rate.

[0115] Optionally, in the embodiment, the storage medium can include but is not limited to a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk and various storage media that can store computer programs.

[0116] The embodiment of the present application also provides an electronic device, comprising a memory and a processor, wherein the memory stores a computer program, and the processor is configured to execute the computer program to execute the steps in any of the method embodiments.

[0117] Optionally, the electronic device can further comprise a transmission device and an input and output device, wherein the transmission device is connected to the processor, and the input and output device is connected to the processor.

[0118] Optionally, in the embodiment, the processor can be configured to execute the following steps by the computer program:

[0119] S1, detecting a first supply liquid temperature and a first return liquid temperature of a cooling liquid of a cooling unit according to a first period, wherein the cooling unit comprises a plurality of refrigeration modules, each of which is connected in parallel to a circulating pipeline of the cooling liquid;

[0120] S2, calculating a supply liquid temperature change rate according to the first supply liquid temperature and a return liquid temperature change rate according to the first return liquid temperature;

[0121] S3, controlling an operation parameter of the plurality of refrigeration modules according to the supply liquid temperature change rate and the return liquid temperature change rate.

[0122] Optionally, specific examples in the embodiments can refer to the examples described in the above-described embodiments and optional implementation manners, and the embodiments will not be described here again.

[0123] The sequence numbers of the embodiments of the present application are only for description, and do not represent the advantages or disadvantages of the embodiments.

[0124] In the above-described embodiments of the present application, the description of each embodiment has its own focus, and the parts not described in detail in a certain embodiment can be referred to the relevant description of other embodiments.

[0125] In the several embodiments of the present application, it should be understood that the disclosed technology can be implemented in other ways. Of course, the unit embodiment described above is only schematic. For example, the division of the units is only a logical function division. There can be another division manner for the actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the displayed or discussed mutual couplings or direct couplings or communication connections between the units can be indirect couplings or communication connections through some interfaces, units or modules, and can be electrical or other forms.

[0126] The units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. According to actual needs, some or all of the units can be selected to achieve the purpose of the embodiments.

[0127] In addition, each functional unit in each embodiment of the present application can be integrated into a processing unit, or each unit can exist physically, or two or more units can be integrated into one unit. The above integrated unit can be realized in the form of hardware, or in the form of a software functional unit.

[0128] The integrated unit, if implemented in the form of a software function unit and sold or used as an independent product, can be stored in a computer readable storage medium. Based on such understanding, the technical solutions of the present application essentially or say the part that contributes to the prior art or the whole or part of the technical solutions can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes a plurality of instructions for causing a computer device (which can be a personal computer, a controller or a network device, etc.) to execute all or part of the steps of the embodiments of the present application. The aforementioned storage medium includes: a U disk, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and various media that can store program codes.

[0129] The above is only the preferred embodiment of the present application, and it should be pointed out that for those skilled in the art, without departing from the principles of the present application, a number of improvements and refinements can be made, which should be considered as the protection scope of the present application.

Claims

1. A control method of a cooling unit, characterized by, The method comprises: detecting a first supply liquid temperature and a first return liquid temperature of a cooling liquid of a cooling unit according to a first period, wherein the cooling unit comprises a plurality of refrigeration modules, each of which is connected in parallel to a circulating pipeline of the cooling liquid; calculating a supply liquid temperature change rate according to the first supply liquid temperature and a return liquid temperature change rate according to the first return liquid temperature; controlling operation parameters of the plurality of refrigeration modules according to the supply liquid temperature change rate and the return liquid temperature change rate.

2. The method of claim 1, wherein, The calculating of the supply liquid temperature change rate according to the first supply liquid temperature comprises: obtaining a plurality of groups of first supply liquid temperatures detected in a plurality of first periods in succession; generating a supply liquid temperature curve by fitting the plurality of groups of first supply liquid temperatures, wherein the supply liquid temperature curve is used to represent a change relationship between the first supply liquid temperature and time; solving a polynomial function of the supply liquid temperature curve; deriving the polynomial function with respect to time to obtain the supply liquid temperature change rate.

3. The method of claim 1, wherein, The controlling of the operation parameters of the plurality of refrigeration modules according to the supply liquid temperature change rate and the return liquid temperature change rate comprises: respectively judging whether the supply liquid temperature change rate and the return liquid temperature change rate are greater than 0 to obtain a judgment result; controlling an opening number of the plurality of refrigeration modules and an operation frequency of a compressor according to the judgment result.

4. The method of claim 3, wherein, The controlling of the opening number of the refrigeration modules and the operation frequency of the compressor according to the judgment result comprises: if the supply liquid temperature change rate and the return liquid temperature change rate are both greater than 0, increasing a real-time operation frequency of a first refrigeration module compressor; judging whether the adjusted real-time operation frequency reaches a highest operation frequency; if the highest operation frequency is reached, increasing the number of the first refrigeration modules, wherein the plurality of refrigeration modules comprise the first refrigeration modules and second refrigeration modules, the first refrigeration modules are refrigeration modules in an open state, and the second refrigeration modules are refrigeration modules in a closed state; if the supply liquid temperature change rate and the return liquid temperature change rate are both equal to 0, maintaining the number of the first refrigeration modules and the real-time operation frequency; if the supply liquid temperature change rate and the return liquid temperature change rate are both less than 0, decreasing the real-time operation frequency of the first refrigeration module compressor; judging whether the adjusted real-time operation frequency reaches a lowest operation frequency; if the lowest operation frequency is reached, decreasing the number of the first refrigeration modules.

5. The method according to claim 4, wherein the increasing of the real-time operation frequency of the first refrigeration module compressor comprises: comparing the return liquid temperature change rate and the supply liquid temperature change rate; if the return liquid temperature change rate is greater than the supply liquid temperature change rate, increasing the real-time operation frequency of the first refrigeration module compressor based on a first step; if the return liquid temperature change rate is less than the supply liquid temperature change rate, increasing the real-time operation frequency of the first refrigeration module compressor based on a second step, wherein the first step is less than the second step; or, ​ Reducing the real-time operating frequency of the first refrigeration module compressor includes: comparing the rate of change of the return liquid temperature and the rate of change of the supply liquid temperature; if the rate of change of the return liquid temperature is greater than the rate of change of the supply liquid temperature, reducing the real-time operating frequency of the first refrigeration module compressor based on a third step length; if the rate of change of the return liquid temperature is less than the rate of change of the supply liquid temperature, reducing the real-time operating frequency of the first refrigeration module compressor based on a fourth step length, wherein the third step length is less than the fourth step length.

6. The method of claim 1, wherein, After controlling the operating parameters of the plurality of refrigeration modules according to the supply liquid temperature change rate and the return liquid temperature change rate, the method further includes: Before the next first cycle arrives, the second supply temperature of the coolant in the cooling unit is detected according to the second cycle, and the set temperature of the cooling unit is obtained, wherein the second cycle is shorter than the first cycle; Calculate the first temperature difference between the second liquid supply temperature and the set temperature; If the first temperature difference is greater than the first preset temperature, the operating frequency of the first refrigeration module compressor is increased; if the first temperature difference is less than the second preset temperature, the operating frequency of the first refrigeration module compressor is decreased; if the first temperature difference is between the first preset temperature and the second preset temperature, the operating frequency of the first refrigeration module compressor is maintained, wherein the first refrigeration module is a refrigeration module in the on state, and the first preset temperature is greater than the second preset temperature.

7. The method of claim 1, wherein, Before detecting the first supply temperature and first return temperature of the coolant in the cooling unit according to the first cycle, the method further includes: Start the power supply of the cooling unit, and after the coolant in the cooling unit completes its first circulation, detect the initial supply temperature and the initial return temperature. Calculate the second temperature difference between the initial return temperature and the initial supply temperature; The initial number of startups and the initial startup frequency of the refrigeration module are configured based on the second temperature difference, wherein the initial number of startups and the initial startup frequency are both positively correlated with the second temperature difference.

8. The method of claim 1, wherein, Before detecting the first supply temperature and first return temperature of the coolant in the cooling unit according to the first cycle, the method further includes: The total capacity, specific heat capacity, and temperature control accuracy of the coolant are determined, as well as the maximum and minimum heat loads of the heat-generating equipment are determined, wherein the cooling unit is used to cool the heat-generating equipment through the coolant; The cold storage capacity of the cooling unit is calculated based on the total capacity, the specific heat capacity, and the temperature control accuracy. The duration for maintaining the first liquid supply temperature of the cooling unit when the cooling capacity is excessive is calculated based on the cold storage capacity and the minimum heat load, and the duration for maintaining the second liquid supply temperature of the cooling unit when the cooling capacity is insufficient is calculated based on the cold storage capacity and the maximum heat load. The minimum value between the first liquid supply temperature maintenance duration and the second liquid supply temperature maintenance duration is selected as the cycle duration of the first cycle.

9. A control device for cooling a unit, characterized by include: The first detection module is used to detect the first supply temperature and the first return temperature of the coolant in the cooling unit according to the first cycle. The cooling unit includes multiple refrigeration modules, each of which is connected in parallel to the circulation pipeline of the coolant. The first computing module is configured to calculate a supply liquid temperature change rate according to the first supply liquid temperature and a return liquid temperature change rate according to the first return liquid temperature. The first control module is configured to control operation parameters of the plurality of refrigeration modules according to the supply liquid temperature change rate and the return liquid temperature change rate.

10. A cooling unit, characterized in that The cooling unit comprises a plurality of refrigeration modules and a controller, wherein the controller comprises the control device of the cooling unit according to claim 9.

11. A storage medium, characterized by A computer program is stored in a storage medium, and the computer program is configured to execute the steps of the control method of the cooling unit according to any one of claims 1 to 8 when running.

12. An electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein, The processor, the communication interface and the memory complete mutual communication through a communication bus. The memory is configured to store a computer program. The processor is configured to execute the steps of the control method of the cooling unit according to any one of claims 1 to 8 by running the program stored in the memory.

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