Dynamic determining method and adjusting method for investment pressure difference of heating power inlet and circulating water pump control method

Abstract

The invention relates to a dynamic determination method and an adjustment method of a thermal inlet asset pressure difference and a circulating water pump control method. The determination method comprises the following steps: acquiring a heating power inlet use pressure difference preset value, a flow preset value of each end user, a preset temperature control valve opening value, current flow information, current temperature control valve opening information and temperature control valve alarm information in the cold / heat supply system; if the temperature control valve alarm information exists, taking a first currently required thermal inlet asset pressure difference determined based on the thermal inlet asset pressure difference at the previous moment and the adjustment coefficient as a thermal inlet asset pressure difference to be adjusted; if the temperature control valve alarm information does not exist, selecting at least one of the current flow information and the current temperature control valve opening information as to-be-calculated information; and taking a second current required heat inlet investment pressure difference calculated based on the initial adjustment operation data and the to-be-calculated information as a to-be-adjusted heat inlet investment pressure difference. According to the method, the heat inlet resource pressure difference is dynamically determined according to the end user load change so as to realize energy saving.

Description

Technical Field

[0001] The present application relates to the technical field of centralized heating / cooling systems, and in particular to a method for dynamically determining and adjusting a pressure difference in a thermal inlet and a method for controlling a circulating water pump. Background Art

[0002] Central heating / cooling systems are systems designed to efficiently and uniformly meet the heating or cooling needs of buildings in modern cities. These systems generate heat or cold energy through central heat or cold source equipment and transport this energy to various buildings or areas through a pipeline network to maintain a comfortable temperature in the indoor environment.

[0003] At present, in order to achieve energy-saving operation of centralized heating / cooling systems, the current heating / cooling terminal equipment is generally equipped with a temperature control valve with variable flow regulation capability; the circulating water pump adopts variable frequency operation to adapt to changes in user load, and a thermal inlet device is usually provided to meet user needs.

[0004] An important function of the thermal inlet device is to maintain the stability of hydraulic conditions. It faces three incentives: one is the centralized flow regulation of heat / cold sources, the second is the user's active flow regulation, and the third is the external network pressure fluctuation interference caused by other thermal inlet regulation. In order to meet the regulation needs, the thermal inlet is usually equipped with a self-acting pressure differential regulating valve.

[0005] When a self-operated differential pressure regulating valve is installed at the thermal inlet, the circulating water pump cannot achieve total flow control through active adjustment; it can only change the speed of the circulating water pump appropriately to maintain the valve position of the self-operated differential pressure valve and save the energy consumed by the self-operated differential pressure valve; when a self-operated differential pressure regulating valve is not installed at the thermal inlet, the speed adjustment of the circulating water pump is usually controlled based on the pressure difference signal between the supply and return water pipes. In terms of pressure difference control strategy, the selectable pressure difference control points include the manifold pressure difference, the supply and return water main pressure difference, the main pipe midpoint pressure difference and the most unfavorable terminal branch pressure difference, among which the latter two are the most widely used in practice.

[0006] Generally speaking, the controlled pressure difference value is often a fixed value. However, when implementing centralized flow regulation of heat / cold sources, in order to achieve the optimal effect, a variable pressure difference control cycle method is required, that is, the pressure difference setting value at the thermal inlet needs to be adjusted accordingly according to the load changes. Therefore, how to dynamically determine the thermal inlet pressure difference according to the end-user load changes is one of the urgent problems to be solved in this field. Summary of the invention

[0007] In order to dynamically determine the available pressure difference of the thermal inlet according to the load changes of the end users, the present application provides a method for dynamically determining the available pressure difference of the thermal inlet, an adjustment method and a circulating water pump control method.

[0008] In a first aspect, the present application provides a method for dynamically determining the pressure difference of a thermal inlet, which adopts the following technical solution:

[0009] A method for dynamically determining a heat inlet pressure difference, comprising:

[0010] Acquire the initial adjustment operation data of each end user in the cooling / heating system, wherein the initial adjustment operation data includes a preset value of the thermal inlet pressure difference, a preset value of the flow rate of each end user, and a preset temperature control valve opening value;

[0011] Acquire current operation data of each end user in the cooling / heating system, wherein the current operation data includes current flow information, current temperature control valve opening information and temperature control valve alarm information;

[0012] For each of the end users, query whether there is temperature control valve alarm information in the current operation data;

[0013] If yes, determining the first currently required thermal inlet available pressure difference based on the thermal inlet available pressure difference at the previous moment and the adjustment coefficient, wherein the adjustment coefficient is greater than 1;

[0014] The first currently required thermal inlet available pressure difference is used as the thermal inlet available pressure difference to be adjusted;

[0015] If not, selecting information to be calculated from the current operation data, the information to be calculated including at least one of current flow information and current temperature control valve opening information;

[0016] The second currently required thermal inlet available pressure difference is calculated based on the initial adjustment operation data and the information to be calculated, and the second currently required thermal inlet available pressure difference is used as the thermal inlet available pressure difference to be adjusted.

[0017] By adopting the above technical solution, the current operating data of each end user is obtained in real time. If there is a temperature control valve alarm in the current operating data, the first currently required thermal inlet pressure difference is determined by the thermal inlet pressure difference and the adjustment coefficient at the previous moment. If there is no temperature control valve alarm in the current operating data, the second currently required thermal inlet pressure difference is calculated by initially adjusting the operating data and the information to be calculated, so that the first currently required thermal inlet pressure difference or the second currently required thermal inlet pressure difference is used as the thermal inlet pressure difference to be adjusted, and then adjusted according to the thermal inlet pressure difference to be adjusted, so that by timely adjusting the thermal inlet pressure difference, the needs of end users are ensured while achieving the optimal energy-saving effect.

[0018] Optionally, when the information to be calculated is the current temperature control valve opening information, the calculation of the second currently required thermal inlet resource pressure difference based on the initial adjustment operation data and the information to be calculated includes:

[0019] Obtaining a preset resistance coefficient corresponding to the preset temperature control valve opening value;

[0020] Calculate the preset total resistance coefficient value of each parallel end user based on the preset value of the thermal inlet pressure difference and the preset value of the flow rate of each end user;

[0021] Obtaining a current resistance coefficient corresponding to the current temperature control valve opening information;

[0022] Calculating a coefficient difference between the current drag coefficient and the preset drag coefficient;

[0023] Calculating the thermal inlet pressure difference required by each parallel end user based on the thermal inlet pressure difference preset value, the preset total resistance coefficient value and the coefficient difference value of each parallel end user;

[0024] The thermal inlet available pressure difference having the maximum value of the available pressure difference required by each parallel end user is selected as the second currently required thermal inlet available pressure difference.

[0025] By adopting the above technical solution, by obtaining the current resistance coefficient corresponding to the current temperature control valve opening information and comparing it with the preset resistance coefficient, the influence of the temperature control valve opening change on the system resistance is determined, so that the pressure difference adjustment is more accurate, which is helpful to maintain the stability of the hydraulic working conditions. In addition, by calculating the thermal inlet pressure difference of each parallel user separately and selecting the maximum value as the basis for adjustment, it can be ensured that all users can obtain sufficient pressure difference, avoiding local users from affecting the cooling / heating effect due to insufficient pressure difference; and avoiding energy waste caused by excessive pressure difference.

[0026] Optionally, when the information to be calculated is current flow information, the step of calculating the second currently required thermal inlet resource pressure difference based on the initial adjustment operation data and the information to be calculated includes:

[0027] Calculate the thermal inlet differential pressure required by each parallel end user based on the thermal inlet differential pressure preset value, current flow information and the flow preset value of each end user;

[0028] The maximum value of the available pressure difference required by each parallel end user is selected as the second currently required thermal inlet available pressure difference.

[0029] By adopting the above technical solution, in the parallel end-user system, the load demands of different users may be different. By calculating the required pressure difference of each user and selecting the maximum value as the basis for adjustment, it is possible to ensure the cooling / heating demand of each user and avoid the energy waste caused by excessive pressure difference of the thermal inlet, thereby maximizing the energy saving effect.

[0030] In a second aspect, the present application provides a method for adjusting the pressure difference of a thermal inlet, which adopts the following technical solution:

[0031] A method for adjusting the pressure difference of a heat inlet, wherein an electric regulating valve is provided at the user inlet of the centralized cooling / heating system, comprising:

[0032] Obtaining the thermal inlet available pressure difference to be adjusted determined by the method for dynamically determining the thermal inlet available pressure difference according to any one of claims 1 to 3;

[0033] Determining the adjustment opening of the electric regulating valve based on the pressure difference of the thermal inlet to be adjusted;

[0034] The opening of the electric regulating valve is adjusted to the adjusted opening.

[0035] By adopting the above technical solution, the adjustment opening of the electric regulating valve is determined by the pressure difference of the thermal inlet to be adjusted, which can ensure that energy (heat energy or cold energy) is distributed to each end user as needed, reduce excessive waste of energy, reduce the operating power of the circulating water pump, and improve energy utilization efficiency.

[0036] In a third aspect, the present application provides a method for adjusting the pressure difference of a thermal inlet, which adopts the following technical solution:

[0037] A circulating water pump control method, when an electric regulating valve is provided at the user heat inlet of the centralized cooling / heating system, the method comprises:

[0038] Determine whether there is a centralized traffic regulation command;

[0039] If the centralized flow regulation command exists, executing the centralized flow regulation command;

[0040] If the centralized flow regulation command does not exist, then calculating a first available pressure difference deviation value between the thermal inlet available pressure difference to be adjusted and the actual thermal inlet available pressure difference of the end user determined by the method for dynamically determining the thermal inlet available pressure difference according to any one of claims 1 to 3;

[0041] Determine whether there is a first available pressure difference deviation value greater than a first preset difference value;

[0042] If there is a first available pressure difference deviation value greater than the first preset difference value, obtaining the opening of the electric regulating valve;

[0043] The operating frequency of the circulating water pump is determined based on the opening degree of the electric regulating valve.

[0044] By adopting the above technical solution, when there is no centralized flow regulation command, the operating frequency of the circulating water pump is determined based on the deviation value of the thermal inlet pressure difference and the opening of the electric regulating valve, ensuring that the output power of the water pump matches the actual demand and avoiding excessive waste of energy; by accurately controlling the operating frequency of the water pump, unnecessary energy consumption and emissions can be reduced, meeting the requirements of modern buildings for green, energy-saving and environmental protection; by real-time monitoring and adjustment of the thermal inlet pressure difference, the system can maintain stable hydraulic conditions and reduce system fluctuations caused by hydraulic imbalance; the control method takes into account multiple factors, such as the centralized flow regulation command and the deviation value of the thermal inlet pressure difference, ensuring that the system can operate stably under various conditions and improving the reliability of the system

[0045] Optionally, determining the operating frequency of the circulating water pump based on the opening of the electric regulating valve includes:

[0046] Determining whether the electric regulating valve is fully open;

[0047] If so, the operating frequency of the circulating water pump is increased; otherwise, the operating frequency of the circulating water pump is maintained and the opening of the electric regulating valve is increased.

[0048] By adopting the above technical solution, when the electric regulating valve is already in a fully open state, the operating frequency of the circulating water pump is increased to maintain the stability of the system. When the electric regulating valve is not fully open, the flow demand is met by increasing the opening of the electric regulating valve instead of directly increasing the operating frequency of the circulating water pump. This achieves more efficient energy utilization while maintaining stable operation of the system.

[0049] Optionally, if there is no first available pressure difference deviation value greater than the first preset difference value, the method further includes:

[0050] Determine whether the electric regulating valve of the thermal inlet is fully open;

[0051] If the electric regulating valve at the thermal inlet is fully open, the operating frequency of the circulating water pump is maintained; otherwise, the operating frequency of the circulating water pump is reduced and the opening of the electric regulating valve is increased.

[0052] By adopting the above technical scheme, when the first available pressure difference deviation value does not exceed the preset threshold value, it proves that the current hydraulic working condition is relatively stable and no major adjustment is required; at this time, when the electric regulating valve is fully opened, by maintaining the operating frequency of the circulating water pump, when the electric regulating valve is not fully opened, by reducing the operating frequency of the circulating water pump and increasing the opening of the electric regulating valve, more efficient energy utilization can be achieved while maintaining stable operation of the system.

[0053] Optionally, when the thermal inlet of the centralized cooling / heating system does not include an electric regulating valve, the method includes:

[0054] Determine whether there is a centralized traffic regulation command;

[0055] If the centralized flow regulation command exists, executing the centralized flow regulation command;

[0056] If the centralized flow regulation command does not exist, then calculating a second available pressure difference deviation value between the available pressure difference of the thermal inlet to be adjusted determined by the method for dynamically determining the available pressure difference of the thermal inlet as claimed in any one of claims 1 to 3 and the actual available pressure difference of the thermal inlet of the end user;

[0057] Determine whether there is a second available pressure difference deviation value greater than the first preset difference value;

[0058] If there is a second available pressure difference deviation value greater than the preset difference value, the operating frequency of the circulating water pump is increased;

[0059] If there is no available pressure difference deviation value greater than the first preset difference value, determine whether the second available pressure difference deviation values ​​of all thermal inlets are less than the second preset difference value, wherein the second preset difference value is a negative number;

[0060] If the second available pressure difference deviation values ​​of all thermal inlets are smaller than the second preset difference value, the operating frequency of the circulating water pump is reduced; otherwise, the operating frequency of the circulating water pump is maintained.

[0061] By adopting the above technical solution, the deviation between the thermal inlet pressure difference to be adjusted and the actual thermal inlet pressure difference is calculated, and the operating frequency of the circulating water pump is adjusted according to the size of the deviation value, which can reduce energy waste while meeting the flow demand.

[0062] In a fourth aspect, the present application provides an electronic device, which adopts the following technical solution:

[0063] An electronic device comprises a processor and a memory, wherein the processor is coupled to the memory;

[0064] The processor is used to execute the computer program stored in the memory so that the electronic device performs any one of the methods described in any one of the first aspect, the second aspect or the third aspect.

[0065] In a fifth aspect, the present application provides a computer-readable storage medium, which adopts the following technical solution:

[0066] A computer-readable storage medium includes a computer program or instructions. When the computer program or instructions are executed on a computer, the computer is caused to execute the method according to any one of the first aspect, the second aspect or the third aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0067] Figure 1 It is a flow chart of a method for dynamically determining the pressure difference of a thermal inlet in an embodiment of the present application.

[0068] Figure 2 It is a flow chart of a method for adjusting the pressure difference of a thermal inlet in an embodiment of the present application.

[0069] Figure 3 It is a flow chart of a circulating water pump control method in an embodiment of the present application.

[0070] Figure 4 It is a cold / heating system in which an electric regulating valve is provided at the end user entrance in the embodiment of the present application.

[0071] Figure 5 It is a flowchart showing the specific steps of step S307 in the embodiment of the present application.

[0072] Figure 6 This is a cold / heating system in which no electric regulating valve is provided at the end-user entrance in the embodiment of the present application.

[0073] Figure 7 It is a structural block diagram of an electronic device in a real-time example of the present application.

[0074] Explanation of the reference numerals: 1. Circulating water pump 1; 2. Cold source / heat source; 3. Electric regulating valve; 4. Temperature control valve; 5. End-user equipment; 6. Heat exchanger; 7. Secondary network circulating water pump; 8. Mixing water pump; a. Direct-connected user; b. Mixed water direct-connected user; c. Indirectly connected user. DETAILED DESCRIPTION

[0075] The present application is further described in detail below in conjunction with the accompanying drawings.

[0076] This specific embodiment is merely an explanation of the present application and is not a limitation of the present application. After reading this specification, those skilled in the art may make modifications to the present embodiment without any creative contribution as needed, but such modifications are protected by the patent law as long as they are within the scope of the claims of the present application.

[0077] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0078] In addition, the term "and / or" in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article, unless otherwise specified, generally means that the associated objects before and after are in an "or" relationship.

[0079] The embodiments of the present application are further described in detail below in conjunction with the drawings in the specification.

[0080] The embodiment of the present application provides a method for dynamically determining the available pressure difference of a thermal inlet, a method for adjusting the available pressure difference of a thermal inlet, and a method for controlling a circulating water pump. The above three methods can be executed by an electronic device, which can be a server or a terminal device, wherein the server can be an independent physical server, a server cluster or a distributed system composed of multiple physical servers, or a cloud server providing cloud computing services. The terminal device can be a smart phone, a tablet computer, a desktop computer, etc., but is not limited thereto.

[0081] like Figure 1 As shown, a method for dynamically determining the pressure difference of a thermal inlet is provided, and the main process of the method is described as follows (steps S101 to S107):

[0082] Step S101, obtaining the initial adjustment operation data of each end user in the cooling / heating system, the initial adjustment operation data including the preset value of the thermal inlet pressure difference, the preset value of the flow rate of each end user and the preset temperature control valve opening value;

[0083] In this embodiment, the electronic device obtains the initial adjustment operation data of each end user, wherein the initial adjustment operation data includes the preset value of the thermal inlet pressure difference Δp0, the preset value of the flow rate of each end user G i0 and temperature control valve opening value L i0 .

[0084] It should be noted that the initial adjustment operation data refers to the operation parameters of each user of the system being adjusted to the design value through valve adjustment and other means before the system is put into operation. For example, for the heating system, assuming the design load rate is 1, which corresponds to the coldest outdoor temperature, the initial adjustment is made according to this parameter. During the initial operation, the heating has just started and the required load rate is relatively low.

[0085] Step S102, obtaining the current operation data of each end user in the cooling / heating system, the current operation data including current flow information, current temperature control valve opening information and temperature control valve alarm information;

[0086] In this embodiment, the electronic device obtains the current operation data of each end user in real time, wherein the current operation data may be collected in real time by a sensor or uploaded by a user, and there is no specific limitation on this.

[0087] Among them, the current operating data includes current flow information, current temperature control valve opening information and temperature control valve alarm information. The temperature control valve alarm information is generated in the following way: the electronic device obtains the actual temperature value of the end user in real time, and compares the actual temperature value with the preset temperature range. When the actual temperature value does not meet the preset temperature range and the temperature control valve is already in a fully open state, the temperature control valve alarm information is generated. The preset temperature range is divided into a heating threshold range and a cooling temperature range. The heating threshold range and the cooling temperature range are set according to needs, and there is no specific limitation on this.

[0088] Step S103, for each end user, query whether there is temperature control valve alarm information in the current operation data, if yes, execute step S104, otherwise execute step S106;

[0089] Step S104, determining a first currently required thermal inlet available pressure difference based on the thermal inlet available pressure difference at the previous moment and the adjustment coefficient, wherein the adjustment coefficient is greater than 1;

[0090] Step S105, taking the first currently required thermal inlet available pressure difference as the thermal inlet available pressure difference to be adjusted;

[0091] In this embodiment, the electronic device queries the current operating data of each end user in real time. If there is temperature control valve alarm information in the current operating data, it proves that the end user cannot reach the set temperature and needs to increase the thermal inlet available pressure difference setting value. At this time, the thermal inlet available pressure difference and adjustment coefficient of the previous moment are obtained.

[0092] The first currently required thermal inlet pressure difference is calculated based on the formula Δp(T)=aΔp(T-1), where Δp(T) is the currently required thermal inlet pressure difference, a is the adjustment coefficient, and Δp(T-1) is the thermal inlet pressure difference at the previous moment.

[0093] Among them, the adjustment coefficient a is greater than 1, and the method for determining the adjustment coefficient can be: presetting any number greater than 1 as the adjustment coefficient a, for example, 1.1, the electronic equipment compares the actual temperature value with the preset temperature range in real time, if 1.1 is too large, the above formula is used to recalculate the thermal inlet service pressure difference, at this time the value of a is greater than 0 and less than 1; otherwise, the value of a needs to be further increased. When the cooling / heating system stabilizes at a certain service pressure difference, the ratio of the stabilized service pressure difference to the service pressure difference before adjustment (that is, a reasonable a value) can be recorded in the expert database, and can be directly called out before the next adjustment, thereby improving the adjustment efficiency.

[0094] Step S106, selecting information to be calculated from the current operating data, the information to be calculated including at least one of current flow information and current temperature control valve opening information;

[0095] In this embodiment, when there is no temperature control valve alarm information, the information to be calculated is selected from the current operating data for calculation, wherein the information to be calculated includes the current flow information or the current temperature control valve opening information, wherein the information to be calculated can be selected as needed.

[0096] In this embodiment, the electronic device obtains the valve opening L-resistance coefficient S relationship table corresponding to the temperature control valve of each end user calibrated at the factory, and determines the temperature control valve opening value L through the valve opening L-resistance coefficient S relationship table. i0 The corresponding preset resistance coefficient S i0 The current preset resistance coefficient S corresponding to the current temperature control valve opening information i .

[0097] Step S107, calculating the second currently required thermal inlet available pressure difference based on the initial adjustment operation data and the information to be calculated, and taking the second currently required thermal inlet available pressure difference as the thermal inlet available pressure difference to be adjusted.

[0098] In this embodiment, the information to be calculated includes one of the current flow information and the current temperature control valve opening information. The calculation of the second current required thermal inlet pressure difference based on the current flow information and the current temperature control valve opening information is described below.

[0099] (I) Current temperature control valve opening information

[0100] Obtain a preset resistance coefficient corresponding to a preset temperature control valve opening value; calculate a preset total resistance coefficient value for each parallel end user based on a preset value of the thermal inlet available pressure difference and a preset flow value for each end user; obtain a current resistance coefficient corresponding to the current temperature control valve opening information; calculate a coefficient difference between the current resistance coefficient and the preset resistance coefficient; calculate the thermal inlet available pressure difference required for each parallel end user based on the preset value of the thermal inlet available pressure difference, the preset total resistance coefficient value for each parallel end user, and the coefficient difference; select the thermal inlet available pressure difference with the maximum value of the available pressure difference required for each parallel end user as the second currently required thermal inlet available pressure difference.

[0101] In this embodiment, the formula S i0总 =Δp0 / G i0 2 Calculate the preset total drag coefficient value for each parallel end user, where S i0总 is the preset total resistance coefficient value, Δp0 is the preset value of the thermal inlet pressure difference, G i0 Set the flow rate for each end user by ΔS i =S i -S i0 Calculate the resistance coefficient difference of each end-user temperature control valve, where S i is the current resistance coefficient of the temperature control valve, S i0 Preset resistance coefficient, ΔS for the temperature control valve i is the difference in resistance coefficient of the temperature control valve; through Δp i =Δp0×S i0总 / (S i0总 +ΔS i ) calculates the required pressure difference of each parallel end user, where Δp i is the required pressure difference for each parallel end user, Δp0 is the preset value of the thermal inlet pressure difference, S i0总 is the preset total resistance coefficient value.

[0102] In this embodiment, the electronic device selects the maximum value of the available pressure difference required by each parallel end user as the second currently required thermal inlet available pressure difference, and adjusts the second currently required thermal inlet available pressure difference as the thermal inlet available pressure difference to be adjusted to meet the cooling or heating needs of the end users.

[0103] It should be noted that the resistance coefficient corresponding to the temperature control valve opening value at the previous moment can also be used to calculate the thermal inlet pressure difference required by the end user. It is only necessary to change all the preset resistance coefficients mentioned above to the resistance coefficients corresponding to the temperature control valve opening value at the previous moment.

[0104] (II) Current traffic information

[0105] The thermal inlet available pressure difference required by each parallel end user is calculated based on the thermal inlet available pressure difference preset value, the current flow information and the flow preset value of each end user; the maximum value of the available pressure difference required by each parallel end user is selected as the second currently required thermal inlet available pressure difference.

[0106] In this embodiment, based on the formula Δp i =Δp0(G i / G i0 ) 2 Calculate the required pressure difference for each parallel end user, where Δp0 is the preset value of the thermal inlet pressure difference, Δp i The required voltage difference for each parallel end user, G i is the current traffic information of each end user, G i0 Preset value for traffic flow for each end user.

[0107] In this embodiment, the electronic device selects the maximum value of the available pressure difference required by each parallel end user as the second currently required thermal inlet available pressure difference, and adjusts the second currently required thermal inlet available pressure difference as the thermal inlet available pressure difference to be adjusted to meet the cooling or heating needs of the end users.

[0108] It should be noted that the thermal inlet available pressure difference value at the previous moment can also be used to calculate the thermal inlet available pressure difference required by the end user. It is only necessary to replace the above-mentioned thermal inlet available pressure difference preset value with the thermal inlet available pressure difference value at the previous moment.

[0109] like Figure 2 As shown, the present application also provides a method for adjusting the pressure difference of a thermal inlet, and the main process of the method is described as follows (steps S201 to S203):

[0110] Step S201, obtaining a heat inlet available pressure difference to be adjusted determined by a heat inlet available pressure difference dynamic determination method;

[0111] Step S202, determining the adjustment opening of the electric regulating valve based on the pressure difference of the thermal inlet to be adjusted;

[0112] Step S203, adjusting the opening of the electric regulating valve to an adjusted opening.

[0113] In this embodiment, the opening of the electric regulating valve corresponding to the thermal inlet pressure difference to be adjusted is determined based on historical information or big data information, and the electronic equipment controls the electric regulating valve to adjust to the corresponding adjustment opening to meet the heating or cooling needs of the end users. The opening of the electric regulating valve can also be determined based on feedback adjustment means, and there is no specific limitation on this.

[0114] like Figure 3As shown, the present application also provides a circulating water pump control method. When an electric regulating valve is provided at the thermal inlet of the centralized cooling / heating system, the main process of the method is described as follows (steps S301 to S307):

[0115] Step S301, determine whether there is a centralized flow adjustment command, if yes, execute step S302, otherwise execute step S303;

[0116] Step S302, executing a centralized flow regulation command;

[0117] In this embodiment, a cooling / heating system is introduced, wherein the cooling / heating system includes a cooling / heating system in which an electric regulating valve is arranged at the entrance of the thermal inlet, such as Figure 4 As shown, the cold / hot system includes a cold source / heat source 2, a directly connected user a, a mixed water directly connected user b and an indirect user c, and the mixed water directly connected user a, the mixed water directly connected user b and the indirect user c are connected in parallel, wherein an electric regulating valve 3 is arranged at the thermal inlet, and a circulating water pump 1 is arranged on the main pipeline of the cold / hot supply system; for the directly connected user a, a temperature control valve 4 and an end user equipment 5 are arranged at each end user; for the mixed water directly connected user b, unlike the directly connected user a, a mixing water pump 8 and a mixing water pipe are also arranged, and the mixing water pump 8 can be arranged on the mixing water pipe, or on the water supply pipe, or on the return pipe; for the indirect user c, unlike the directly connected user a, a heat exchanger 6 and a secondary network circulating water pump 7 are also included.

[0118] In this embodiment, there may or may not be a centralized flow regulation command in the cooling / heating system, and there is no specific limitation on this. The cooling / heating system may be bottom-up, or it may have both bottom-up and top-down predictive regulation, wherein bottom-up is user-initiated regulation and top-down is centralized regulation.

[0119] Secondly, if there is a top-down regulation strategy, when the cooling or heating load is predicted to increase, the operating frequency of the circulating water pump can be increased in advance; or for an indirectly operated system, centralized operating instructions are required.

[0120] Step S303, calculating a first available pressure difference deviation value between the available pressure difference of the thermal inlet to be adjusted determined by a method for dynamically determining the available pressure difference of the thermal inlet and the actual available pressure difference of the thermal inlet of the end user;

[0121] In this embodiment, when there is no centralized flow regulation command, the available pressure difference deviation value is calculated by the available pressure difference of the thermal inlet to be adjusted calculated by the above-mentioned method for dynamically determining the available pressure difference of the thermal inlet, wherein the available pressure difference deviation value is the difference between the available pressure difference of the thermal inlet to be adjusted and the actual inlet available pressure.

[0122] Step S304, determining whether there is a first available pressure difference deviation value greater than a first preset difference value, if so, executing step S305, otherwise executing step S307;

[0123] Step S305, obtaining the opening of the electric regulating valve;

[0124] Step S306, determining the operating frequency of the circulating water pump based on the opening of the electric regulating valve.

[0125] Specifically, it is determined whether the opening of the electric regulating valve is fully open; if so, the operating frequency of the circulating water pump is increased; otherwise, the operating frequency of the circulating water pump is maintained and the opening of the electric regulating valve is increased.

[0126] In this embodiment, the first preset difference is set as needed. When there is a first available pressure difference deviation value greater than the first preset difference value, it proves that there is a large deviation in the first available pressure difference deviation value, and therefore adjustment is required. At this time, the electronic device obtains the opening of the electric regulating valve. When the opening of the electric regulating valve is 100%, the operating frequency of the circulating water pump is increased to reduce the difference between the thermal inlet available pressure difference to be adjusted and the actual inlet available pressure, thereby reducing the possibility of not reaching the temperature required by the end user.

[0127] When the opening of the electric regulating valve is not 100%, the operating frequency of the circulating water pump is maintained, and the opening of the electric regulating valve is adjusted to reduce the difference between the thermal inlet pressure difference to be adjusted and the actual inlet pressure difference, thereby reducing the possibility of not reaching the temperature required by the end user and saving energy consumption to a certain extent.

[0128] like Figure 5 As shown, step S307 includes the following sub-steps (a to c):

[0129] Step a, determining whether the electric regulating valve of the thermal inlet is fully open, if so, executing step b, otherwise executing step c;

[0130] Step b, maintaining the operating frequency of the circulating water pump;

[0131] Step c, reduce the operating frequency of the circulating water pump and increase the opening of the electric regulating valve.

[0132] When there is no available pressure difference deviation value greater than the first preset difference, check whether the opening of the electric control valve is 100%. If so, maintain the current operating frequency of the circulating water pump. When the opening is not 100%, reduce the operating frequency of the circulating water pump and increase the opening of the electric control valve to save energy.

[0133] When no electric regulating valve is provided at the user heat inlet of the centralized cooling / heating system, a circulating water pump control method further includes:

[0134] Determine whether there is a centralized flow regulation command; if there is a centralized flow regulation command, execute the centralized flow regulation command; if there is no centralized flow regulation command, calculate the second resource pressure difference deviation value between the resource pressure difference of the thermal inlet to be adjusted and the actual resource pressure difference of the thermal inlet of the end user determined by a method for dynamically determining the resource pressure difference of the thermal inlet as claimed in any one of claims 1-3; determine whether there is a second resource pressure difference deviation value greater than the first preset difference; if there is a second resource pressure difference deviation value greater than the preset difference, increase the operating frequency of the circulating water pump; if there is no resource pressure difference deviation value greater than the first preset difference, determine whether the second resource pressure difference deviation values ​​of all thermal inlets are less than the second preset difference, wherein the second preset difference is a negative number; if the second resource pressure difference deviation values ​​of all thermal inlets are less than the second preset difference, reduce the operating frequency of the circulating water pump, otherwise maintain the operating frequency of the circulating water pump.

[0135] In this embodiment, for some cooling / heating systems that do not have a pressure regulating device at the thermal inlet, as shown in 6, the cooling / heating system includes a cold source / heat source 2, and a circulating water pump 1 is provided on the main pipeline of the cooling / heating system. The cold source / heat source 2 is connected to a plurality of end users arranged in parallel, and each end user includes a temperature control valve 4 and an end user device 5.

[0136] In order to save energy consumption, the electronic device obtains in real time whether there is a centralized flow adjustment command. When there is a centralized flow adjustment command, the centralized adjustment command is used for adjustment. When there is no centralized adjustment command, a thermal inlet available pressure difference to be adjusted determined by a method for dynamically determining the available pressure difference of the thermal inlet is obtained, and the difference between the available pressure difference of the thermal inlet to be adjusted and the actual available pressure difference of the thermal inlet is calculated to obtain an available pressure difference deviation value. When the available pressure difference deviation value is greater than a first preset value, the operating efficiency of the circulating water pump is improved. When the available pressure difference deviation value is not greater than the first preset value, Determine whether the second available pressure difference deviation values ​​of all thermal inlets are smaller than the second preset difference. When the second available pressure difference deviation values ​​of all thermal inlets are smaller than the second preset difference, reduce the operating frequency of the circulating water pump. Otherwise, maintain the operating frequency of the circulating water pump. That is, when the available pressure difference deviation values ​​of all thermal inlets are smaller than a negative threshold, i.e., the second preset value, it indicates that the heating or cooling system is in an oversupply state, i.e., the flow and pressure in the heating or cooling system exceed the actual demand. At this time, reducing the operating frequency of the circulating water pump can reduce unnecessary energy consumption and improve energy utilization efficiency.

[0137] It is particularly noted that the numerical value of the increase or decrease in the operating frequency and the numerical value of the increase or decrease in the opening of the electric control valve can be determined by feedback adjustment, and can also be determined by adjusting the operating frequency and the available pressure difference and the electric control valve and the available pressure difference in historical data or big data, for example, through a line graph, a linear regression model, etc.

[0138] Figure 7 FIG. 4 is a structural block diagram of an electronic device 400 provided in an embodiment of the present application. Figure 7 As shown, the electronic device 400 includes a memory 401, a processor 402 and a communication bus 403; the memory 401 and the processor 402 are connected via the communication bus 403. The memory 401 stores a method for dynamically determining a heat inlet available pressure difference, a method for adjusting a heat inlet available pressure difference or a circulating water pump control method provided in the above embodiments, which can be loaded and executed by the processor 402.

[0139] The memory 401 can be used to store instructions, programs, codes, code sets or instruction sets. The memory 401 may include a program storage area and a data storage area, wherein the program storage area may store instructions for implementing an operating system, instructions for at least one function, and instructions for implementing a method for dynamically determining a thermal inlet pressure difference, a method for adjusting a thermal inlet pressure difference, or a circulating water pump control method provided in the above embodiment, etc.; the data storage area may store data involved in a method for dynamically determining a thermal inlet pressure difference, a method for adjusting a thermal inlet pressure difference, or a circulating water pump control method provided in the above embodiment, etc.

[0140] The processor 402 may include one or more processing cores. The processor 402 executes various functions and processes data of the present application by running or executing instructions, programs, code sets or instruction sets stored in the memory 401, calling the data stored in the memory 401. The processor 402 may be at least one of an application-specific integrated circuit (ASIC), a digital signal processor (DSP), a digital signal processing device (DSPD), a programmable logic device (PLD), a field programmable gate array (FPGA), a central processing unit (CPU), a controller, a microcontroller and a microprocessor. It is understandable that for different devices, the electronic device used to implement the above-mentioned processor 402 function can also be other, and the embodiment of the present application is not specifically limited.

[0141] The communication bus 403 may include a path to transmit information between the above components. The communication bus 403 may be a PCI (Peripheral Component Interconnect) bus or an EISA (Extended Industry Standard Architecture) bus. The communication bus 403 may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, Figure 6 Only one double arrow is used in the diagram, but this does not mean that there is only one bus or only one type of bus.

[0142] An embodiment of the present application provides a computer-readable storage medium storing a computer program that can be loaded by a processor and executed by a method for dynamically determining a thermal inlet pressure difference, a method for adjusting a thermal inlet pressure difference, or a circulating water pump control method as provided in the above embodiments.

[0143] In this embodiment, the computer-readable storage medium may be a tangible device that holds and stores instructions used by the instruction execution device. The computer-readable storage medium may be, but is not limited to, an electrical storage device, a magnetic storage device, an optical storage device, an electromagnetic storage device, a semiconductor storage device, or any combination thereof. Specifically, the computer-readable storage medium may be a portable computer disk, a hard disk, a USB flash drive, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), a podium random access memory (SRAM), a portable compact disk read-only memory (CD-ROM), a digital versatile disk (DVD), a memory stick, a floppy disk, an optical disk, a magnetic disk, a mechanical encoding device, and any combination thereof.

[0144] The terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not expressly listed, or also includes elements inherent to such process, method, article, or apparatus.

[0145] The above description is only a preferred embodiment of the present application and an explanation of the technical principles used. Those skilled in the art should understand that the scope of application involved in the present application is not limited to the technical solution formed by a specific combination of the above technical features, but should also cover other technical solutions formed by any combination of the above technical features or their equivalent features without departing from the aforementioned application concept. For example, the above features are replaced with (but not limited to) technical features with similar functions applied in the present application.

Claims

1. A method for dynamically determining the pressure difference of a thermal inlet, characterized in that: include: Acquire the initial adjustment operation data of each end user in the cooling / heating system, wherein the initial adjustment operation data includes a preset value of the thermal inlet pressure difference, a preset value of the flow rate of each end user, and a preset temperature control valve opening value; Acquire current operation data of each end user in the cooling / heating system, wherein the current operation data includes current flow information, current temperature control valve opening information and temperature control valve alarm information; For each of the end users, query whether there is temperature control valve alarm information in the current operation data; If yes, determining the first currently required thermal inlet available pressure difference based on the thermal inlet available pressure difference at the previous moment and the adjustment coefficient, wherein the adjustment coefficient is greater than 1; The first currently required thermal inlet available pressure difference is used as the thermal inlet available pressure difference to be adjusted; If not, selecting information to be calculated from the current operation data, the information to be calculated including at least one of current flow information and current temperature control valve opening information; The second currently required thermal inlet available pressure difference is calculated based on the initial adjustment operation data and the information to be calculated, and the second currently required thermal inlet available pressure difference is used as the thermal inlet available pressure difference to be adjusted.

2. The method according to claim 1, characterized in that When the information to be calculated is the current temperature control valve opening information, the second currently required thermal inlet pressure difference is calculated based on the initial adjustment operation data and the information to be calculated, including: Obtaining a preset resistance coefficient corresponding to the preset temperature control valve opening value; Calculate the preset total resistance coefficient value of each parallel end user based on the preset value of the thermal inlet pressure difference and the preset value of the flow rate of each end user; Obtaining a current resistance coefficient corresponding to the current temperature control valve opening information; Calculating a coefficient difference between the current drag coefficient and the preset drag coefficient; Calculating the thermal inlet pressure difference required by each parallel end user based on the thermal inlet pressure difference preset value, the preset total resistance coefficient value and the coefficient difference value of each parallel end user; The thermal inlet available pressure difference having the maximum value of the available pressure difference required by each parallel end user is selected as the second currently required thermal inlet available pressure difference.

3. The method according to claim 1, characterized in that: When the information to be calculated is current flow information, the calculation of the second currently required thermal inlet resource pressure difference based on the initial adjustment operation data and the information to be calculated includes: Calculate the thermal inlet differential pressure required by each parallel end user based on the thermal inlet differential pressure preset value, current flow information and the flow preset value of each end user; The maximum value of the available pressure difference required by each parallel end user is selected as the second currently required thermal inlet available pressure difference.

4. A method for adjusting the pressure difference at a heat inlet, wherein an electric regulating valve is provided at the heat inlet of a user of the centralized cooling / heating system, characterized in that: include: Obtaining the thermal inlet available pressure difference to be adjusted determined by the method for dynamically determining the thermal inlet available pressure difference according to any one of claims 1 to 3; Determining the adjustment opening of the electric regulating valve based on the pressure difference of the thermal inlet to be adjusted; The opening of the electric regulating valve is adjusted to the adjusted opening.

5. A circulating water pump control method, characterized in that: When an electric regulating valve is provided at the user heat inlet of the centralized cooling / heating system, the method comprises: Determine whether there is a centralized traffic regulation command; If the centralized flow regulation command exists, executing the centralized flow regulation command; If the centralized flow regulation command does not exist, then calculating a first available pressure difference deviation value between the thermal inlet available pressure difference to be adjusted and the actual thermal inlet available pressure difference of the end user determined by the method for dynamically determining the thermal inlet available pressure difference according to any one of claims 1 to 3; Determine whether there is a first available pressure difference deviation value greater than a first preset difference value; If there is a first available pressure difference deviation value greater than the first preset difference value, obtaining the opening of the electric regulating valve; The operating frequency of the circulating water pump is determined based on the opening degree of the electric regulating valve.

6. The method according to claim 5, characterized in that The step of determining the operating frequency of the circulating water pump based on the opening of the electric regulating valve comprises: Determining whether the electric regulating valve is fully open; If so, the operating frequency of the circulating water pump is increased; otherwise, the operating frequency of the circulating water pump is maintained and the opening of the electric regulating valve is increased.

7. The method according to claim 5, characterized in that If there is no first available pressure difference deviation value greater than the first preset difference value, the method further includes: Determine whether the electric regulating valve of the thermal inlet is fully open; If the electric regulating valve at the thermal inlet is fully open, the operating frequency of the circulating water pump is maintained; otherwise, the operating frequency of the circulating water pump is reduced and the opening of the electric regulating valve is increased.

8. The method according to claim 1, characterized in that When the thermal inlet of the central cooling / heating system does not include an electric regulating valve, the method includes: Determine whether there is a centralized traffic regulation command; If the centralized flow regulation command exists, executing the centralized flow regulation command; If the centralized flow regulation command does not exist, then calculating a second available pressure difference deviation value between the available pressure difference of the thermal inlet to be adjusted determined by the method for dynamically determining the available pressure difference of the thermal inlet as claimed in any one of claims 1 to 3 and the actual available pressure difference of the thermal inlet of the end user; Determine whether there is a second available pressure difference deviation value greater than the first preset difference value; If there is a second available pressure difference deviation value greater than the preset difference value, the operating frequency of the circulating water pump is increased; If there is no available pressure difference deviation value greater than the first preset difference value, determine whether the second available pressure difference deviation values ​​of all thermal inlets are less than the second preset difference value, wherein the second preset difference value is a negative number; If the second available pressure difference deviation values ​​of all thermal inlets are smaller than the second preset difference value, the operating frequency of the circulating water pump is reduced; otherwise, the operating frequency of the circulating water pump is maintained.

9. An electronic device, characterized in that: comprising a processor and a memory, wherein the processor is coupled to the memory; The processor is configured to execute a computer program stored in the memory, so that the electronic device executes the method according to any one of claims 1 to 8.

10. A computer-readable storage medium, characterized in that: The method comprises a computer program or an instruction, which, when executed on a computer, causes the computer to execute the method according to any one of claims 1 to 8.

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