Valve opening degree control method, device, nonvolatile storage medium, and processor

Abstract

The application discloses a valve opening control method and device, a nonvolatile storage medium and a processor. The method comprises the following steps: determining a target opening value corresponding to the valve under a current pressure difference based on a target flow value; adjusting the current opening value of the valve to the target opening value, and calculating an actual flow value of the fluid flowing through the valve; and in the case that the actual flow value is not equal to the target flow value, adjusting the current opening value of the valve, so that the difference between the actual flow value and the target flow value belongs to a preset flow value range. Through the application, the problem that the valve opening is difficult to be adjusted according to the flow requirement in the related art is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of valve control, in particular to a valve opening degree control method and device, a nonvolatile storage medium and a processor. BACKGROUND

[0002] In order to regulate the flow, various valves have appeared in the related art, for example, a constant flow valve, i.e., a constant flow regulating valve, has a constant flow regulating function and can meet the flow regulating demand under the constant flow requirement.

[0003] The constant flow valve is a valve combining a self-operated pressure difference control device and a flow regulating device. The working principle is that the pressure difference control device is used to control and stabilize the pressure difference before and after the flow regulating device, so that when the pressure difference before and after the valve is greater than the constant flow starting value, the flow through the valve no longer changes with the pressure difference before and after the valve, i.e., within the range of pressure difference control, the flow through a certain opening degree of the valve can automatically remain constant, and the change of the flow can be realized only by adjusting the opening degree of the valve, which is irrelevant to the pressure difference before and after the valve.

[0004] However, the constant flow valve in the related art has the following disadvantages: it cannot automatically adjust the opening degree of the valve according to the flow requirement, and it cannot output the real-time flow size without an intelligent interface.

[0005] At present, there is no effective solution to the problem that the opening degree of the valve cannot be adjusted according to the flow requirement in the related art. SUMMARY

[0006] The present application provides a valve opening degree control method and device, a nonvolatile storage medium and a processor to solve the problem that the opening degree of the valve cannot be adjusted according to the flow requirement in the related art.

[0007] According to one aspect of the present application, a valve opening degree control method is provided. The method comprises: determining a target opening degree value corresponding to the valve under a current pressure difference based on a target flow value; adjusting the current opening degree value of the valve to the target opening degree value and calculating an actual flow value of the fluid flowing through the valve; and in the case that the actual flow value is not equal to the target flow value, adjusting the current opening degree value of the valve so that the difference between the actual flow value and the target flow value belongs to a preset flow value range.

[0008] Optionally, determining the target opening degree value corresponding to the valve under the current pressure difference based on the target flow value comprises: calculating a target parameter value of the fluid according to the target flow value and the pressure difference, wherein the target parameter value and the opening degree value of the valve have a mapping relationship, and the type of the target parameter value is one of the following: resistance number, flow coefficient; and determining the target opening degree value according to the target parameter value and the mapping relationship.

[0009] Optionally, the calculating the target parameter value of the fluid according to the target flow value and the pressure difference comprises: in a case that the temperature variation value of the fluid belongs to a preset temperature value range, calculating a resistance value of the fluid according to the target flow value and the pressure difference, and determining the resistance value as the target parameter value; or calculating a flow coefficient value of the fluid according to the target flow value, the pressure difference and a preset density, and determining the flow coefficient value as the target parameter value; in a case that the temperature variation value of the fluid does not belong to the preset temperature value range, determining a current density of the fluid according to a current temperature of the fluid, calculating a flow coefficient value of the fluid according to the target flow value, the pressure difference and the current density, and determining the flow coefficient value as the target parameter value.

[0010] Optionally, before the determining the target opening value according to the target parameter value and the mapping relationship, the method further comprises: judging whether the target parameter value belongs to a preset range; in a case that the target parameter value is greater than a maximum value corresponding to the preset range or is less than a minimum value corresponding to the preset range, issuing an alarm information; in a case that the target parameter value belongs to the preset range, performing the step of determining the target opening value according to the target parameter value and the mapping relationship.

[0011] Optionally, the determining the target opening value according to the target parameter value and the mapping relationship comprises: in a case that the mapping relationship is represented by a mapping table, matching a parameter value in the mapping table according to the target parameter value, and obtaining a valve opening corresponding to the matched parameter value, and determining the target opening value according to the valve opening corresponding to the matched parameter value, wherein the mapping table comprises a corresponding relationship between parameter values and valve openings; in a case that the mapping relationship is represented by a preset relationship, determining a valve opening corresponding to the target parameter value based on the preset relationship, and determining the valve opening corresponding to the target parameter value as the target opening value, wherein the preset relationship is determined by the corresponding relationship between parameter values and valve openings in the mapping table.

[0012] Optionally, before the determining the target opening value corresponding to the valve under the current pressure difference based on the target flow value, the method further comprises: obtaining a current pressure difference of the valve, and judging whether the current pressure difference is greater than zero; in a case that the current pressure difference is less than or equal to zero, determining a current opening value of the valve as a maximum valve opening value, and issuing an alarm information; in a case that the current pressure difference is greater than zero, performing the step of determining the target opening value corresponding to the valve under the current pressure difference based on the target flow value.

[0013] Optionally, adjusting the current opening value of the valve to the target opening value and calculating the actual flow value of the fluid flowing through the valve comprises: adjusting the current opening value of the valve to the target opening value and obtaining an updated current pressure difference; in a case where the temperature change value of the fluid belongs to a preset temperature value range, calculating the actual flow value according to the target opening value and the updated current pressure difference, or calculating the actual flow value according to the target opening value, the updated current pressure difference and a preset density; in a case where the temperature change value of the fluid does not belong to the preset temperature value range, determining a current density of the fluid according to a current temperature of the fluid, and calculating the actual flow value according to the target opening value, the updated current pressure difference and the current density.

[0014] Optionally, in a case where the actual flow value is not equal to the target flow value, adjusting the current opening value of the valve so that a difference between the actual flow value and the target flow value belongs to a preset flow value range comprises: in a case where the actual flow value is greater than the target flow value, reducing the target opening value so that the difference between the actual flow value and the target flow value belongs to the preset flow value range; in a case where the actual flow value is less than the target flow value, increasing the target opening value so that the difference between the actual flow value and the target flow value belongs to the preset flow value range.

[0015] Optionally, the valve comprises a valve body and a controller, the controller comprises a communication interface and / or a human-computer interaction module, wherein the communication interface is configured to receive the target flow value or send a target signal value, and the human-computer interaction module is configured to set the target flow value, and display the target flow value and / or display the target signal value, wherein the target signal value comprises at least one of the following: the current pressure difference, the target opening value and the actual flow value.

[0016] According to another aspect of the present application, a control device for valve opening is provided. The device comprises: a first determination unit configured to determine a target opening value of a valve corresponding to a current pressure difference based on a target flow value; a calculation unit configured to adjust a current opening value of the valve to the target opening value and calculate an actual flow value of a fluid flowing through the valve; and an adjustment unit configured to, in a case where the actual flow value is not equal to the target flow value, adjust the current opening value of the valve so that a difference between the actual flow value and the target flow value belongs to a preset flow value range.

[0017] Optionally, the first determination unit comprises: a first calculation module configured to calculate a target parameter value of the fluid according to the target flow value and the pressure difference, wherein the target parameter value and the opening value of the valve have a mapping relationship, and the target parameter value is of one of the following types: a resistance number and a flow coefficient; and a determination module configured to determine the target opening value according to the target parameter value and the mapping relationship.

[0018] Optionally, the first calculating module comprises: a first calculating submodule, configured to calculate the resistance value of the fluid according to the target flow value and the pressure difference, and determine the resistance value as the target parameter value, or calculate the flow coefficient value of the fluid according to the target flow value, the pressure difference and the preset density, and determine the flow coefficient value as the target parameter value, when the temperature change value of the fluid belongs to the preset temperature value range; and a second calculating submodule, configured to determine the current density of the fluid according to the current temperature of the fluid, calculate the flow coefficient value of the fluid according to the target flow value, the pressure difference and the current density, and determine the flow coefficient value as the target parameter value, when the temperature change value of the fluid does not belong to the preset temperature value range.

[0019] Optionally, the determining module comprises: a first determining submodule, configured to match the parameter value in the mapping table according to the target parameter value, and obtain the valve opening corresponding to the matched parameter value, and determine the target opening value according to the valve opening corresponding to the matched parameter value, when the mapping relationship is represented by the mapping table, wherein the mapping table comprises the corresponding relationship between the parameter value and the valve opening; and a second determining submodule, configured to determine the valve opening corresponding to the target parameter value based on the preset relationship, and determine the valve opening corresponding to the target parameter value as the target opening value, when the mapping relationship is represented by the preset relationship, wherein the preset relationship is determined by the corresponding relationship between the parameter value and the valve opening in the mapping table.

[0020] Optionally, the calculating unit comprises: a first adjusting module, configured to adjust the current opening value of the valve to the target opening value, and obtain the updated current pressure difference; a second calculating module, configured to calculate the actual flow value according to the target opening value and the updated current pressure difference, or calculate the actual flow value according to the target opening value, the updated current pressure difference and the preset density, when the temperature change value of the fluid belongs to the preset temperature value range; and a third calculating module, configured to determine the current density of the fluid according to the current temperature of the fluid, and calculate the actual flow value according to the target opening value, the updated current pressure difference and the current density, when the temperature change value of the fluid does not belong to the preset temperature value range.

[0021] According to another aspect of the embodiments of the present application, a non-volatile storage medium is also provided, which comprises a stored program, wherein the program, when executed, controls a device in which the non-volatile storage medium is located to perform the valve opening control method.

[0022] According to another aspect of the embodiments of the present application, an electronic device is also provided, which comprises a processor and a memory, and the memory stores computer readable instructions, and the processor is configured to execute the computer readable instructions, wherein the computer readable instructions, when executed, perform the valve opening control method.

[0023] According to the application, the following steps are adopted: determining a target opening value corresponding to the valve under a current pressure difference based on a target flow value; adjusting the current opening value of the valve to the target opening value, and calculating an actual flow value of the fluid flowing through the valve; and in the case that the actual flow value is not equal to the target flow value, adjusting the current opening value of the valve so that the difference between the actual flow value and the target flow value belongs to a preset flow value range, thereby solving the problem in the prior art that it is difficult to adjust the valve opening according to the flow requirement. The current opening value of the valve is adjusted according to the target flow value, so that the actual flow value approaches the target flow value, thereby achieving the effect of flexibly adjusting the valve opening according to the flow requirement. BRIEF DESCRIPTION OF DRAWINGS

[0024] The accompanying drawings, which form a part of the present application, are intended to provide further understanding of the present application, and are used to interpret the application together with the description. In the drawings:

[0025] Figure 1 is a flow chart of a control method of a valve opening provided according to an embodiment of the present application;

[0026] Figure 2 is a schematic diagram of an optional valve provided according to an embodiment of the present application;

[0027] Figure 3 is a schematic diagram of an optional valve provided according to an embodiment of the present application;

[0028] Figure 4 is a flow chart of an optional control method of a valve opening provided according to an embodiment of the present application;

[0029] Figure 5 is a flow chart of an optional control method of a valve opening provided according to an embodiment of the present application;

[0030] Figure 6 is a schematic diagram of a control device of a valve opening provided according to an embodiment of the present application. DETAILED DESCRIPTION

[0031] It should be noted that the embodiments and features in the present application can be combined with each other without conflict. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0032] 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 with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present application, but not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by persons skilled in the art without creative labor should belong to the protection scope of the present application.

[0033] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and in the above drawings are used to distinguish similar objects, and do not necessarily have to be used to describe a specific order or 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. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.

[0034] According to the embodiments of the present application, a valve opening control method is provided.

[0035] Figure 1 is a flow chart of the valve opening control method according to the embodiments of the present application. As shown in Figure 1 , the method comprises the following steps:

[0036] Step S102, determining the target opening value corresponding to the target flow value under the current pressure difference of the valve.

[0037] Specifically, the target flow value is a flow value set in advance that can meet the flow demand at the back end of the valve, the current pressure difference is the difference between the inlet pressure value and the outlet pressure value of the current valve, the valve corresponds to different opening values under different pressure differences at the same flow, and the target opening value corresponding to the target flow value under the current pressure difference is determined, thereby laying a foundation for flow regulation.

[0038] In order to ensure the normal work of the valve while improving the accuracy of calculating the target opening value, optionally, in the valve opening control method provided by the embodiments of the present application, before determining the target opening value corresponding to the target flow value under the current pressure difference of the valve, the method further comprises: acquiring the current pressure difference of the valve, and judging whether the current pressure difference is greater than zero; in the case that the current pressure difference is less than or equal to zero, determining that the current opening value of the valve is the maximum valve opening value, and issuing an alarm information; in the case that the current pressure difference is greater than zero, executing the step of determining the target opening value corresponding to the target flow value under the current pressure difference of the valve.

[0039] Step S104, adjusting the current opening value of the valve to the target opening value, and calculating the actual flow value of the fluid flowing through the valve.

[0040] Specifically, the current opening value of the valve is adjusted to the target opening value, the flow value is regulated, and the adjusted flow value is calculated in real time to obtain the actual flow value.

[0041] In the case that the actual flow value is not equal to the target flow value, the current opening value of the valve is adjusted so that the difference between the actual flow value and the target flow value belongs to the preset flow value range.

[0042] Specifically, in the case that the actual flow value is equal to the target flow value, it indicates that the flow value of the fluid flowing through the valve meets the flow requirement, and the valve opening is kept unchanged. In the case that the actual flow value is not equal to the target flow value, the current opening value of the valve is continuously adjusted according to the current pressure difference, so that the actual flow value tends to be consistent with the target flow value, thereby making the fluid flowing through the valve meet the flow requirement.

[0043] The method for controlling the valve opening provided in the embodiments of the present application determines the target opening value of the valve corresponding to the current pressure difference based on the target flow value, adjusts the current opening value of the valve to the target opening value, and calculates the actual flow value of the fluid flowing through the valve. In the case that the actual flow value is not equal to the target flow value, the current opening value of the valve is adjusted so that the difference between the actual flow value and the target flow value belongs to the preset flow value range, thereby solving the problem that it is difficult to adjust the valve opening according to the flow requirement in the related art. The current opening value of the valve is adjusted based on the target flow value so that the actual flow value tends to be close to the target flow value, thereby achieving the effect of flexibly adjusting the valve opening according to the flow requirement.

[0044] Optionally, in the method for controlling the valve opening provided in the embodiments of the present application, determining the target opening value of the valve corresponding to the current pressure difference based on the target flow value comprises: calculating the target parameter value of the fluid according to the target flow value and the pressure difference, wherein the target parameter value and the opening value of the valve have a mapping relationship, and the type of the target parameter value is one of the following: resistance number, flow coefficient; and determining the target opening value according to the target parameter value and the mapping relationship.

[0045] It should be noted that the resistance number is the pressure loss that must be overcome by the fluid flowing in the pipeline, and is a pipeline resistance characteristic coefficient. The resistance number and the opening value of the valve have a mapping relationship, the resistance number value of the fluid can be obtained, and then the target opening value is determined according to the mapping relationship between the resistance number value and the opening value.

[0046] The flow coefficient represents the flow capacity of the valve, and its definition is: when the regulating valve is fully opened, the pressure difference between the front and rear of the valve is 100 KPa, the fluid density is 1000 Kg / m3 (i.e. water at room temperature), and the flow value of the fluid flowing through the regulating valve per hour. The flow coefficient and the opening value of the valve have a mapping relationship, the flow coefficient value of the fluid can be calculated, and then the target opening value is determined according to the mapping relationship between the flow coefficient value and the opening value.

[0047] The temperature characteristics of different fluids are different. Optionally, in the valve opening degree control method provided in the embodiments of the present application, the calculating of the target parameter value of the fluid according to the target flow value and the pressure difference includes: in the case that the temperature change value of the fluid belongs to a preset temperature value range, calculating the resistance value of the fluid according to the target flow value and the pressure difference, and determining the resistance value as the target parameter value; or calculating the flow coefficient value of the fluid according to the target flow value, the pressure difference and a preset density, and determining the flow coefficient value as the target parameter value; in the case that the temperature change value of the fluid does not belong to the preset temperature value range, determining the current density of the fluid according to the current temperature of the fluid, calculating the flow coefficient value of the fluid according to the target flow value, the pressure difference and the current density, and determining the flow coefficient value as the target parameter value.

[0048] Specifically, the relationship between the resistance S and the flow Q and the pressure difference ΔP can be represented by Formula One: ΔP=S*Q 2 And the relationship between the flow coefficient KV and the flow Q and the pressure difference ΔP can be represented by Formula Two: ΔP=ρ / KV*Q 2 Wherein, ρ is the density of the fluid.

[0049] Therefore, for fluids with little temperature change, such as refrigerated water of an air conditioner, the density can be considered as a constant, given the target flow value and the preset density, and the current pressure difference is known, the resistance value can be obtained by Formula One, or the flow coefficient value can be obtained by Formula Two, and the resistance value or the flow coefficient value is determined as the target parameter.

[0050] It should be noted that the flow coefficient KV is a constant related to the geometric structure of the valve and the given stroke. As can be seen from Formula One and Formula Two, S=ρ / KV. For fluids with little temperature change, since the density can be considered as a constant, the resistance S can also be considered as a constant. However, for fluids with large temperature change, the density is a variable, the density corresponding to the current temperature value of the fluid can be determined according to the temperature-density table first, as shown in Table 1, and then the flow coefficient value can be calculated according to Formula Two, and the flow coefficient value is determined as the target parameter, and finally the valve opening degree is determined according to the target parameter, and the valve opening degree obtained is more accurate, which can adapt to fluids with different temperature characteristics.

[0051] Table 1

[0052] Temperature T Fluid density p …… …… …… …… …… ……

[0053] The preset range is a range in which the target parameter value falls in a case where the valve is normally working. Optionally, in the control method of the valve opening degree provided in the embodiments of the present application, before the target opening degree value is determined according to the target parameter value and the mapping relationship, the method further includes: determining whether the target parameter value belongs to the preset range; in a case where the target parameter value is greater than a maximum value corresponding to the preset range or is less than a minimum value corresponding to the preset range, issuing an alarm information; and in a case where the target parameter value belongs to the preset range, performing the step of determining the target opening degree value according to the target parameter value and the mapping relationship.

[0054] It should be noted that the determination manner of the maximum value and the minimum value corresponding to the preset range is different in a case where the type of the target parameter is different. Specifically, in a case where the type of the target parameter value is a flow coefficient, the maximum value corresponding to the preset range can be a target parameter value corresponding to the maximum valve opening degree, and the minimum value corresponding to the preset range can be a target parameter value corresponding to the minimum valve opening degree. In a case where the type of the target parameter value is a resistance number, the maximum value corresponding to the preset range can be a target parameter value corresponding to the minimum valve opening degree, and the minimum value corresponding to the preset range can be a target parameter value corresponding to the maximum valve opening degree. Thus, in a case where the target parameter value is greater than the maximum value corresponding to the preset range, it is indicated that the valve opening degree is greater than the maximum opening degree, and the alarm information is issued. In a case where the target parameter value is less than the minimum value corresponding to the preset range, it is indicated that the valve opening degree is less than the minimum opening degree, and the alarm information is issued. In a case where the target parameter value is in the preset range, it is indicated that the valve is normally working, and the determination of the target opening degree value is performed.

[0055] Optionally, in the control method of the valve opening degree provided in the embodiments of the present application, the determination of the target opening degree value according to the target parameter value and the mapping relationship includes: in a case where the mapping relationship is represented by a mapping table, matching the target parameter value with a parameter value in the mapping table, obtaining a valve opening degree corresponding to the matched parameter value, and determining the target opening degree value according to the valve opening degree corresponding to the matched parameter value, wherein the mapping table contains a corresponding relationship between the parameter value and the valve opening degree; and in a case where the mapping relationship is represented by a preset relationship, determining the valve opening degree corresponding to the target parameter value based on the preset relationship, and determining the valve opening degree corresponding to the target parameter value as the target opening degree value, wherein the preset relationship is determined by the corresponding relationship between the parameter value and the valve opening degree in the mapping table.

[0056] In an optional embodiment, the mapping relationship is represented by a mapping table, as shown in Table 2, the mapping table lists a one-to-one corresponding relationship between the opening degree of the valve and the resistance number, or between the opening degree of the valve and the flow coefficient. The mapping table can be given by the valve manufacturer, or can be measured in the process of applying the valve.

[0057] Table 2

[0058]

[0059] Specifically, after the resistance value or the flow coefficient value is obtained, the parameters in Table 2 are matched to obtain one or two matched parameters. In the case of obtaining one matched parameter, the valve opening can be determined according to an approximation method, and in the case of obtaining two matched parameters, the valve opening can be determined according to an interpolation method.

[0060] In another optional embodiment, the mapping relationship is represented by a preset relationship. Specifically, since the valve opening and the resistance number, the opening and the flow coefficient have a one-to-one correspondence, a regression analysis method can be used to find the correlation between the opening and the resistance number, thereby obtaining a first preset relationship reflecting the correlation, and a regression analysis method can be used to find the correlation between the opening and the flow coefficient, thereby obtaining a second preset relationship reflecting the correlation, and further calculating the valve opening based on the first preset relationship or the second preset relationship.

[0061] The temperature characteristics of different fluids are different. Optionally, in the valve opening control method provided in the embodiments of the present application, adjusting the current opening value of the valve to the target opening value and calculating the actual flow value of the fluid flowing through the valve include: adjusting the current opening value of the valve to the target opening value and obtaining an updated current pressure difference; in the case that the temperature change value of the fluid belongs to a preset temperature value range, calculating the actual flow value according to the target opening value and the updated current pressure difference, or calculating the actual flow value according to the target opening value, the updated current pressure difference and a preset density; in the case that the temperature change value of the fluid does not belong to the preset temperature value range, determining the current density of the fluid according to the current temperature of the fluid, and calculating the actual flow value according to the target opening value, the updated current pressure difference and the current density.

[0062] Specifically, the target opening value corresponds to the resistance number or the flow coefficient obtained by querying Table 2. The relationship between the resistance number S and the flow Q and the pressure difference ΔP can be represented by Formula One: ΔP = S * Q 2 And the relationship between the flow coefficient KV and the flow Q and the pressure difference ΔP can be represented by Formula Two: ΔP = ρ / KV * Q 2 Wherein, ρ is the density of the fluid.

[0063] Therefore, for fluids with little temperature change, given the resistance number and the updated pressure difference, the actual flow value can be obtained by Formula One; given the resistance number, the updated pressure difference and the preset density, the actual flow value can be obtained by Formula Two.

[0064] For the fluid with large temperature change, the density is a variable, as shown in Table 1, the corresponding density of the current fluid at the temperature value can be determined according to the temperature density table, the resistance number, the updated pressure difference and the current density are given, and then the actual flow value is calculated according to the second formula.

[0065] In order to make the flow value of the fluid flowing through the valve meet the flow demand, optionally, in the valve opening control method provided by the embodiment of the application, in the case that the actual flow value is not equal to the target flow value, the current opening value of the valve is adjusted so that the difference between the actual flow value and the target flow value belongs to the preset flow value range, including: in the case that the actual flow value is greater than the target flow value, the target opening value is reduced so that the difference between the actual flow value and the target flow value belongs to the preset flow value range; in the case that the actual flow value is less than the target flow value, the target opening value is increased so that the difference between the actual flow value and the target flow value belongs to the preset flow value range.

[0066] Specifically, in the case that the actual flow value is not equal to the target flow value, the current opening value of the valve is continuously adjusted so that the actual flow value approaches the target flow value, so that the flow value of the fluid meets the flow demand.

[0067] Optionally, in the valve opening control method provided by the embodiment of the application, the valve includes a valve body and a controller, the controller includes a communication interface and / or a man-machine interaction module, wherein the communication interface is used to receive a target flow value or send a target signal value, and the man-machine interaction module is used to set the target flow value, and display the target flow value and / or display the target signal value, wherein the target signal value at least includes one of the following: the current pressure difference, the target opening value and the actual flow value.

[0068] Specifically, the communication interface can be a 485 communication interface, which can input signals such as target flow, and can also output signals such as inlet and outlet pressure, opening, flow and the like of the valve. The man-machine interaction module can include a display screen and operation buttons, and can set or modify parameters such as target flow, and can also display various information such as inlet and outlet pressure, opening, flow and the like of the valve.

[0069] In an optional embodiment, as shown in Figure 2 For the fluid with small temperature change, the controller can obtain the inlet pressure value and the outlet pressure value of the valve, and obtain the target flow value determined by the communication interface or the man-machine interaction module, so as to calculate the target signal value according to the obtained parameters and control the valve opening.

[0070] In an optional embodiment, as shown in Figure 3As shown, the optional valve diagram provided by the embodiment of the present application, for the fluid with large temperature change, the controller can acquire the inlet pressure value, outlet pressure value of the valve and the current temperature value of the fluid, and acquire the target flow value determined by the communication interface or the human-computer interaction module, so as to calculate the target signal value according to the acquired parameters and control the valve opening degree.

[0071] Through the embodiment, the flow dynamic parameters can be input through the communication interface, the valve opening degree is automatically adjusted according to the pressure difference between the inlet and outlet of the valve, and the precise flow control is realized. The flow parameters are input through the communication interface and the human-computer interaction module, the valve opening degree is automatically adjusted according to the pressure difference between the inlet and outlet of the valve, and the digital constant flow regulation is realized. According to the pressure difference between the inlet and outlet of the valve, the real-time flow value can be calculated, and the intelligent interface and the human-computer interface are outputted, and the function of the digital flow meter with output is realized.

[0072] Figure 4 is a flow chart of the optional valve opening degree control method according to the embodiment of the present application. As shown, Figure 4 the method comprises:

[0073] acquire the preset flow Q, read the valve inlet pressure P1, valve outlet pressure P2 and fluid temperature T collected by the sensor, and calculate the real-time pressure difference ΔP=P1-P2. It is judged whether ΔP is greater than 0, in the case of no, it is indicated that the valve is the maximum opening degree and alarms, in the case of yes, according to the temperature T, the temperature density table is searched to obtain ρ or input ρ, and the flow coefficient KV=Q 2 / ΔP*ρ can be solved.

[0074] Further, it is judged whether KV is greater than the corresponding value of the maximum opening degree of the valve and whether it is less than the corresponding value of the minimum opening degree of the valve, in the case of not meeting, specifically, in the case of less than the corresponding value of the minimum opening degree of the valve, it is indicated that the valve is the minimum opening degree and alarms, in the case of greater than the corresponding value of the maximum opening degree of the valve, it is indicated that the valve is the maximum opening degree and alarms. In the case of meeting, the valve opening degree X corresponding to the valve opening degree and KV is determined according to the table, or the valve opening degree X is solved by the calculation formula, and the valve is controlled to execute according to the opening degree X.

[0075] Further, according to the current valve opening degree X, valve inlet pressure P1, valve outlet pressure P2 and fluid temperature T, it is calculated whether the actual flow Q* is equal to Q, in the case of equal, the opening degree of the valve is kept, in the case of greater, the valve opening degree is appropriately reduced, and the actual flow Q* is further calculated, until the actual flow Q* is equal to Q, in the case of less, the valve opening degree is appropriately increased, and the actual flow Q* is further calculated, until the actual flow Q* is equal to Q.

[0076] Figure 5 is a flow chart of the optional valve opening degree control method according to the embodiment of the present application. As shown,Figure 5 The method comprises the following steps of:

[0077] The preset flow Q is acquired, the valve inlet pressure P1, the valve outlet pressure P2 and the fluid temperature T collected by the sensor are read, and the real-time pressure difference ΔP = P1-P2 is calculated. It is judged whether ΔP is greater than 0. If not, it is indicated that the valve is at the maximum opening and an alarm is given. If yes, the resistance number S = ΔP / Q of the valve is calculated. 2 .

[0078] Further, it is judged whether S is less than the number corresponding to the maximum opening of the valve and greater than the number corresponding to the minimum opening of the valve. If not, specifically, if S is less than the number corresponding to the maximum opening of the valve, it is indicated that the valve is at the minimum opening and an alarm is given. If S is greater than the number corresponding to the minimum opening of the valve, it is indicated that the valve is at the maximum opening and an alarm is given. If yes, the water valve opening X is determined according to the table corresponding to the valve opening and S, or the water valve opening X is calculated by using a calculation formula, and the valve is controlled to execute according to the opening X.

[0079] Further, according to the current valve opening X, the valve inlet pressure P1, the valve outlet pressure P2 and the fluid temperature T, it is calculated whether the actual flow Q* is equal to Q. If yes, the opening of the valve is maintained. If Q* is greater than Q, the valve opening is appropriately reduced, and the actual flow Q* is further calculated until Q* is equal to Q. If Q* is less than Q, the valve opening is appropriately increased, and the actual flow Q* is further calculated until Q* is equal to Q.

[0080] According to the valve pressure difference and the set flow value, the resistance number or the flow coefficient of the valve is calculated, the valve opening is calculated according to the resistance number or the flow coefficient, and the valve opening is continuously adjusted when the flow value is not equal to the set flow value, so that the purpose of accurately regulating the flow through the valve is achieved.

[0081] It should be noted that the steps shown in the flowchart of the accompanying drawings can be executed in a computer system such as a group of computer executable instructions, and although the logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0082] The valve opening control device according to the embodiment of the present application is introduced as follows.

[0083] Figure 6 is a schematic diagram of the valve opening control device according to the embodiment of the present application. As shown in the figure, the valve opening control device according to the embodiment of the present application comprises a valve opening control device 1, a valve 2, a sensor 3 and a valve opening control device 4. Figure 6As shown, the device comprises a first determining unit 10, a calculating unit 20 and an adjusting unit 30.

[0084] Specifically, the first determining unit 10 is configured to determine a target opening value of the valve corresponding to the current pressure difference based on the target flow value.

[0085] The calculating unit 20 is configured to adjust the current opening value of the valve to the target opening value and calculate an actual flow value of the fluid flowing through the valve.

[0086] The adjusting unit 30 is configured to adjust the current opening value of the valve so that the difference between the actual flow value and the target flow value belongs to a preset flow value range in the case that the actual flow value is not equal to the target flow value.

[0087] The device for controlling the opening of the valve provided in the embodiments of the present application determines the target opening value of the valve corresponding to the current pressure difference based on the target flow value through the first determining unit 10, adjusts the current opening value of the valve to the target opening value and calculates the actual flow value of the fluid flowing through the valve through the calculating unit 20, and adjusts the current opening value of the valve so that the difference between the actual flow value and the target flow value belongs to a preset flow value range in the case that the actual flow value is not equal to the target flow value through the adjusting unit 30, thereby solving the problem that it is difficult to adjust the opening of the valve according to the flow requirement in the related art, adjusting the current opening value of the valve through the target flow value so that the actual flow value approaches the target flow value, and thus achieving the effect of flexibly adjusting the opening of the valve according to the flow requirement.

[0088] Optionally, in the device for controlling the opening of the valve provided in the embodiments of the present application, the first determining unit 10 comprises a first calculating module configured to calculate a target parameter value of the fluid according to the target flow value and the pressure difference, wherein the target parameter value and the opening value of the valve have a mapping relationship, and the type of the target parameter value is one of the following: resistance number, flow coefficient; and a determining module configured to determine the target opening value according to the target parameter value and the mapping relationship.

[0089] Optionally, in the device for controlling the opening of the valve provided in the embodiments of the present application, the first calculating module comprises a first calculating submodule configured to calculate a resistance number value of the fluid according to the target flow value and the pressure difference and determine the resistance number value as the target parameter value in the case that the temperature change value of the fluid belongs to a preset temperature value range, or calculate a flow coefficient value of the fluid according to the target flow value, the pressure difference and a preset density and determine the flow coefficient value as the target parameter value; and a second calculating submodule configured to determine a current density of the fluid according to a current temperature of the fluid, calculate a flow coefficient value of the fluid according to the target flow value, the pressure difference and the current density, and determine the flow coefficient value as the target parameter value in the case that the temperature change value of the fluid does not belong to the preset temperature value range.

[0090] Optionally, in the valve opening control device provided by the embodiment of the present application, the device further comprises: a judging module, configured to judge whether the target parameter value belongs to a preset range before determining the target opening value according to the target parameter value and the mapping relationship; an alarm module, configured to send an alarm information in a case that the target parameter value is greater than a maximum value corresponding to the preset range or is less than a minimum value corresponding to the preset range; and an executing module, configured to execute the step of determining the target opening value according to the target parameter value and the mapping relationship in a case that the target parameter value belongs to the preset range.

[0091] Optionally, in the valve opening control device provided by the embodiment of the present application, the determining module comprises: a first determining submodule, configured to match a parameter value in a mapping table according to the target parameter value and obtain a valve opening corresponding to the matched parameter value in a case that the mapping relationship is represented by the mapping table, and determine the target opening value according to the valve opening corresponding to the matched parameter value, wherein the mapping table comprises a corresponding relationship between parameter values and valve openings; and a second determining submodule, configured to determine a valve opening corresponding to the target parameter value based on a preset relationship and determine the valve opening corresponding to the target parameter value as the target opening value in a case that the mapping relationship is represented by the preset relationship, wherein the preset relationship is determined by the corresponding relationship between parameter values and valve openings in the mapping table.

[0092] Optionally, in the valve opening control device provided by the embodiment of the present application, the device further comprises: an obtaining unit, configured to obtain a current pressure difference of the valve and judge whether the current pressure difference is greater than zero before determining the target opening value corresponding to the valve under the current pressure difference based on the target flow value; a second determining unit, configured to determine the current opening value of the valve as a maximum valve opening value and send an alarm information in a case that the current pressure difference is less than or equal to zero; and an executing unit, configured to execute the step of determining the target opening value corresponding to the valve under the current pressure difference based on the target flow value in a case that the current pressure difference is greater than zero.

[0093] Optionally, in the valve opening control device provided by the embodiment of the present application, the computing unit 20 comprises: a first adjusting module, configured to adjust the current opening value of the valve to the target opening value and obtain an updated current pressure difference; a second computing module, configured to calculate the actual flow value according to the target opening value and the updated current pressure difference in a case that the temperature change value of the fluid belongs to a preset temperature value range, or calculate the actual flow value according to the target opening value, the updated current pressure difference and a preset density; and a third computing module, configured to determine a current density of the fluid according to a current temperature of the fluid in a case that the temperature change value of the fluid does not belong to the preset temperature value range, and calculate the actual flow value according to the target opening value, the updated current pressure difference and the current density.

[0094] Optionally, in the valve opening control device provided by the embodiment of the present application, the adjusting unit 30 comprises: a second adjusting module, configured to reduce the target opening value when the actual flow value is greater than the target flow value, so that the difference between the actual flow value and the target flow value belongs to the preset flow value range; and a third adjusting module, configured to increase the target opening value when the actual flow value is less than the target flow value, so that the difference between the actual flow value and the target flow value belongs to the preset flow value range.

[0095] Optionally, in the valve opening control device provided by the embodiment of the present application, the valve comprises a valve body and a controller, and the controller comprises a communication interface and / or a man-machine interaction module, wherein the communication interface is configured to receive the target flow value or send the target signal value, and the man-machine interaction module is configured to set the target flow value, and display the target flow value and / or the target signal value, wherein the target signal value comprises at least one of the following: the current pressure difference, the target opening value and the actual flow value.

[0096] The valve opening control device comprises a processor and a memory, and the first determining unit 10, the calculating unit 20 and the adjusting unit 30 are all stored in the memory as program units, and the corresponding functions are realized by the processor executing the program units stored in the memory.

[0097] The processor comprises a core, and the core is configured to call the corresponding program units from the memory. The core can be one or more, and the problem that it is difficult to adjust the valve opening according to the flow requirement in the related art can be solved by adjusting the core parameters.

[0098] The memory can comprise a non-permanent memory in a computer readable medium, a random access memory (RAM) and / or a non-volatile memory such as a read-only memory (ROM) or a flash memory (flash RAM), and the memory comprises at least one memory chip.

[0099] The embodiment of the present application also provides a non-volatile storage medium, which comprises a stored program, wherein the program controls a device in which the non-volatile storage medium is located to execute a valve opening control method when the program is running.

[0100] The embodiment of the present application also provides an electronic device comprising a processor and a memory, wherein the memory stores computer readable instructions, and the processor is configured to run the computer readable instructions, and the computer readable instructions execute a valve opening control method when running. The electronic device in the present application can be a server, a PC, a PAD, a mobile phone and the like.

[0101] Those skilled in the art will appreciate that embodiments of the application can be readily used as software, hardware, or a combination of software and hardware. In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0102] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

[0103] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

[0104] The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. Figure 1 The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks. The computer program instructions can also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer-implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart block or blocks.

[0105] In a typical configuration, a computing device includes one or more processors (CPUs), input / output interfaces, network interfaces, and memory.

[0106] The memory can include non-persistent memory, random access memory (RAM), and / or non-volatile memory, etc. in the form of a computer-readable medium, such as read only memory (ROM) or flash memory. The memory is an example of computer-readable media.

[0107] Computer-readable media includes permanent and non-permanent, movable and non-movable media that can be implemented by any method or technology to store information. The information can be computer-readable instructions, data structures, program modules or other data. Examples of computer storage media include, but are not limited to, phase-change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, compact disc read-only memory (CD-ROM), digital versatile disc (DVD) or other optical storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other non-transmission medium that can be used to store information accessible to a computing device. According to the definition herein, computer-readable media does not include transitory media such as modulated data signals and carriers.

[0108] It should also be noted that the terms "comprising", "containing", or any other variant thereof are intended to cover non-exclusive inclusions, so that a process, method, article or apparatus that includes a list of elements does not only include those elements, but also includes other elements not explicitly listed, or further includes elements inherent in such a process, method, article or apparatus. Without more limitations, the element defined by the statement "comprising a" does not exclude the presence of additional identical elements in the process, method, article or apparatus that includes the element.

[0109] The above is only an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the present application shall be included in the scope of claims of the present application.

Claims

1. A method for controlling valve opening, characterized in that, include: Determining the target valve opening value under the current pressure difference based on the target flow rate value includes: calculating the target parameter value of the fluid according to the target flow rate value and the pressure difference, wherein the target parameter value and the valve opening value have a mapping relationship, and the type of the target parameter value is one of the following: resistance number, flow coefficient; determining the target opening value according to the target parameter value and the mapping relationship; Adjust the current opening value of the valve to the target opening value, and calculate the actual flow rate of the fluid flowing through the valve; If the actual flow rate is not equal to the target flow rate, adjust the current opening value of the valve so that the difference between the actual flow rate and the target flow rate falls within a preset flow rate range. The calculation of the target parameter value of the fluid based on the target flow rate value and the pressure difference includes: If the temperature change of the fluid falls within a preset temperature range, the resistance value of the fluid is calculated based on the target flow rate and the pressure difference, and the resistance value is determined as the target parameter value; or the flow coefficient value of the fluid is calculated based on the target flow rate, the pressure difference, and the preset density, and the flow coefficient value is determined as the target parameter value. If the temperature change of the fluid does not fall within the preset temperature range, the current density of the fluid is determined based on the current temperature of the fluid, the flow coefficient of the fluid is calculated based on the target flow rate, the pressure difference, and the current density, and the flow coefficient is determined as the target parameter value.

2. The method according to claim 1, characterized in that, Before determining the target aperture value based on the target parameter value and the mapping relationship, the method further includes: Determine whether the target parameter value falls within a preset range; An alarm message is issued when the target parameter value is greater than the maximum value corresponding to the preset range, or less than the minimum value corresponding to the preset range. If the target parameter value falls within the preset range, the step of determining the target opening value based on the target parameter value and the mapping relationship is performed.

3. The method according to claim 1, characterized in that, Determining the target opening value based on the target parameter value and the mapping relationship includes: When the mapping relationship is represented by a mapping table, the target parameter value is matched with the parameter value in the mapping table, and the valve opening corresponding to the matched parameter value is obtained. The target opening value is determined based on the valve opening corresponding to the matched parameter value, wherein the mapping table contains the correspondence between the parameter value and the valve opening. When the mapping relationship is represented by a preset relation, the valve opening corresponding to the target parameter value is determined based on the preset relation, and the valve opening corresponding to the target parameter value is determined as the target opening value, wherein the preset relation is determined by the correspondence between the parameter value and the valve opening in the mapping table.

4. The method according to claim 1, characterized in that, Before determining the target valve opening value under the current pressure difference based on the target flow rate value, the method further includes: Obtain the current pressure difference of the valve and determine whether the current pressure difference is greater than zero; If the current pressure difference is less than or equal to zero, determine the current valve opening value as the maximum valve opening value and issue an alarm message; If the current pressure difference is greater than zero, perform the step of determining the target opening value of the valve under the current pressure difference based on the target flow rate value.

5. The method according to claim 1, characterized in that, The step of adjusting the current opening value of the valve to the target opening value and calculating the actual flow rate of the fluid flowing through the valve includes: Adjust the current opening value of the valve to the target opening value, and obtain the updated current pressure difference; If the temperature change of the fluid is within a preset temperature range, the actual flow rate is calculated based on the target opening value and the updated current pressure difference, or the actual flow rate is calculated based on the target opening value, the updated current pressure difference, and the preset density. If the temperature change of the fluid does not fall within the preset temperature range, the current density of the fluid is determined based on the current temperature of the fluid, and the actual flow rate is calculated based on the target opening value, the updated current pressure difference, and the current density.

6. The method according to claim 1, characterized in that, The step of adjusting the current opening value of the valve so that the difference between the actual flow rate and the target flow rate falls within a preset flow rate range when the actual flow rate is not equal to the target flow rate includes: If the actual flow rate is greater than the target flow rate, the target opening value is reduced so that the difference between the actual flow rate and the target flow rate falls within the preset flow rate range. If the actual flow rate is less than the target flow rate, the target opening value is increased so that the difference between the actual flow rate and the target flow rate falls within the preset flow rate range.

7. The method according to claim 1, characterized in that, The valve includes a valve body and a controller. The controller includes a communication interface and / or a human-machine interface module. The communication interface is used to receive the target flow value or send a target signal value. The human-machine interface module is used to set the target flow value and display the target flow value and / or display the target signal value. The target signal value includes at least one of the following: the current pressure difference, the target opening value, and the actual flow value.

8. A valve opening control device, characterized in that, include: The first determining unit is used to determine the target opening value of the valve under the current pressure difference based on the target flow value; The first determining unit includes: a first calculation module, used to calculate target parameter values ​​of the fluid based on the target flow rate value and the pressure difference, wherein the target parameter values ​​and the valve opening value have a mapping relationship, and the type of the target parameter values ​​is one of the following: resistance number, flow coefficient; and a determining module, used to determine the target opening value based on the target parameter values ​​and the mapping relationship. The first calculation module includes: a first calculation submodule, configured to calculate the resistance value of the fluid based on the target flow rate and the pressure difference, and determine the resistance value as the target parameter value, when the temperature change value of the fluid is within a preset temperature range; or to calculate the flow coefficient value of the fluid based on the target flow rate, the pressure difference, and a preset density, and determine the flow coefficient value as the target parameter value; and a second calculation submodule, configured to determine the current density of the fluid based on the current temperature, calculate the flow coefficient value of the fluid based on the target flow rate, the pressure difference, and the current density, and determine the flow coefficient value as the target parameter value, when the temperature change value of the fluid is not within the preset temperature range. The calculation unit is used to adjust the current opening value of the valve to the target opening value and calculate the actual flow rate of the fluid flowing through the valve. The regulating unit is used to adjust the current opening value of the valve when the actual flow value is not equal to the target flow value, so that the difference between the actual flow value and the target flow value is within a preset flow value range.

9. The apparatus according to claim 8, characterized in that, The determining module includes: The first determining submodule is configured to, when the mapping relationship is represented by a mapping table, match the parameter value in the mapping table according to the target parameter value, obtain the valve opening corresponding to the matched parameter value, and determine the target opening value according to the valve opening corresponding to the matched parameter value, wherein the mapping table contains the correspondence between the parameter value and the valve opening; The second determining submodule is used to determine the valve opening corresponding to the target parameter value based on the preset relational expression when the mapping relationship is characterized by the preset relational expression, and to determine the valve opening corresponding to the target parameter value as the target opening value, wherein the preset relational expression is determined by the correspondence between the parameter value and the valve opening in the mapping table.

10. The apparatus according to claim 8, characterized in that, The computing unit includes: The first adjustment module is used to adjust the current opening value of the valve to the target opening value and obtain the updated current pressure difference; The second calculation module is used to calculate the actual flow rate based on the target opening value and the updated current pressure difference when the temperature change value of the fluid is within a preset temperature value range, or to calculate the actual flow rate based on the target opening value, the updated current pressure difference, and the preset density. The third calculation module is used to determine the current density of the fluid based on the current temperature of the fluid when the temperature change value of the fluid does not fall within the preset temperature value range, and to calculate the actual flow rate value based on the target opening value, the updated current pressure difference, and the current density.

11. A non-volatile storage medium, characterized in that, The non-volatile storage medium includes a stored program, wherein, when the program is executed, it controls the device containing the non-volatile storage medium to perform the valve opening control method according to any one of claims 1 to 7.

12. An electronic device, characterized in that, The device includes a processor and a memory, the memory storing computer-readable instructions, and the processor executing the computer-readable instructions, wherein the computer-readable instructions, when executed, perform the valve opening control method according to any one of claims 1 to 7.

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