CN116358117A - Control method, device and electronic equipment of ice storage air conditioning system - Google Patents

Abstract

The invention provides a control method, device and electronic equipment for an ice-storage air-conditioning system. Wherein, the method is applied to the controller of the ice storage air conditioning system, and the method includes: adjusting the parameters of the ice storage air conditioning system when switching the cooling mode based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system; The parameters control the ice storage air conditioning system to perform cooling operation. In this way, the parameters of the ice-storage air-conditioning system when switching the cooling mode can be adjusted based on the outlet temperature of the plate heat exchanger, so as to ensure a stable outlet water temperature in the ice-storage air-conditioning system and improve user experience.

Description

Control method, device and electronic equipment of ice storage air conditioning system

technical field

The invention relates to the technical field of air-conditioning systems, in particular to a control method, device and electronic equipment for an ice-storage air-conditioning system.

Background technique

The ice-storage air-conditioning system is to use refrigeration equipment to remove the heat in the cold-storage medium for cold storage when no or little cooling is needed (such as at night), and then use this cold for air-conditioning or industrial cooling peak periods. Through the application of cold storage technology, the running time of refrigeration equipment can be shifted. On the one hand, the cheap electricity at night can be used, and on the other hand, the peak electric load during the day can be reduced, so as to achieve the purpose of shifting power peaks and filling valleys, and saving electricity bills. The difficulty of the ice storage air-conditioning system is to ensure the stability of the water supply temperature during the switching process of the dual-working condition host and the ice tank.

Usually, the ice storage air-conditioning system will formulate the operation mode of the cold source equipment according to the electricity price of the current period, such as the ice tank cooling mode, the dual-working condition host cooling mode and the combined cooling mode. In the process of mode switching, due to the delay in the start-up and shutdown of the chiller, the traditional control strategy cannot guarantee the stability of the water temperature control. Especially for places with strict requirements on temperature and humidity, such as factories and laboratories, it is usually required that the fluctuation range of the water supply temperature does not exceed ±0.5°C. The switching control logic of the ice storage air conditioning system will cause a large fluctuation range of the outlet water temperature, which will affect users. sense of experience.

Contents of the invention

In view of this, the object of the present invention is to provide a control method, device and electronic equipment for an ice storage air conditioning system, so as to ensure a stable outlet water temperature in the ice storage air conditioning system and improve user experience.

In the first aspect, an embodiment of the present invention provides a control method for an ice storage air conditioning system, which is applied to the controller of the ice storage air conditioning system. The method includes: adjusting and switching cooling supply based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system The parameters of the ice storage air conditioning system in the mode; the ice storage air conditioning system is controlled to perform the cooling operation based on the parameters of the ice storage air conditioning system.

In a preferred embodiment of the present application, the cooling mode of the ice storage air conditioning system is switched from the dual working mode host cooling mode to the ice storage tank cooling mode; The steps of setting the parameters of the ice storage air conditioning system in the cooling mode include: maintaining the working state of the chilled water pump of the ice storage air conditioning system, adjusting the valve of the ice storage tank and the regulating valve of the plate heat exchanger in the ice storage air conditioning system; The opening of the valve of the ice tank and the opening of the regulating valve of the plate heat exchanger are determined based on the outlet temperature of the plate heat exchanger; the chiller unit, cooling water pump and cooling water tower of the ice storage air conditioning system are turned off.

In a preferred embodiment of the present application, the cooling mode of the ice storage air conditioning system is switched from the ice storage tank cooling mode to the dual working condition host cooling mode; The step of setting parameters of the ice storage air-conditioning system in the cooling mode includes: determining the number of chillers in the ice storage air-conditioning system after mode switching;

Turn on the number of chillers, cooling water pumps and cooling towers in operation; adjust the opening of the valve of the ice storage tank in the ice storage air conditioning system based on the outlet water temperature of the chiller and the outlet temperature of the plate heat exchanger.

In a preferred embodiment of the present application, the above-mentioned step of determining the number of chillers in the ice storage air-conditioning system after mode switching includes: obtaining the load of the ice storage air-conditioning system before mode switching; based on the load before switching and the pre-established A load forecasting model is used to determine the forecasted load of the ice storage air-conditioning system after mode switching; based on the forecasted load after mode switching, the number of chillers in the ice storage air-conditioning system after mode switching is determined.

In a preferred embodiment of the present application, the above-mentioned step of adjusting the opening of the valve of the ice storage tank in the ice storage air conditioning system based on the water outlet temperature of the chiller and the outlet temperature of the plate heat exchanger includes: obtaining ice after mode switching; The actual load of the cold storage air conditioning system; if the difference between the water outlet temperature of the chiller minus the outlet temperature of the plate heat exchanger is greater than the preset first threshold, or the ratio of the predicted load to the actual load after mode switching is less than the preset ratio Threshold, increase the opening of the valve of the ice storage tank in the ice storage air conditioning system; if the ratio of the predicted load to the actual load after mode switching is greater than the proportional threshold, reduce the opening of the valve of the ice storage tank in the ice storage air conditioning system; if the cold water The absolute value of the difference between the water outlet temperature of the unit minus the outlet temperature of the plate heat exchanger is less than the preset second threshold, and the valve of the ice storage tank in the ice storage air conditioning system is closed.

In a preferred embodiment of the present application, the step of reducing the opening degree of the valve of the ice storage tank in the ice storage air conditioning system includes: determining the opening degree of the valve of the ice storage tank in the ice storage air conditioning system by the following formula: V1 ,ub=(Tch,out-Tice,out)/(Tch,out-T3+Tcomp); Among them, V1,ub is the upper limit value of the opening of the valve of the ice storage tank in the ice storage air-conditioning system, Tch,out is the outlet water temperature of the chiller, Tice,out is the outlet water temperature of the ice storage tank, T3 is the outlet temperature of the plate heat exchanger, and Tcomp is the preset compensation temperature.

In a preferred embodiment of the present application, the above method further includes: switching the cooling mode of the ice-storage air-conditioning system based on the current power time period and/or the amount of ice in the ice-storage tank of the ice-storage air-conditioning system.

In a preferred embodiment of the present application, the step of switching the cooling mode of the ice-storage air-conditioning system includes: switching the cooling mode of the ice-storage air-conditioning system from the cooling mode of the main engine under dual working conditions to the cooling mode of the ice storage tank; Alternatively, the cooling mode of the ice storage air conditioning system is switched from the cooling mode of the ice storage tank to the cooling mode of the main engine under dual working conditions.

In the second aspect, the embodiment of the present invention also provides a control device for an ice storage air conditioning system, which is applied to the controller of the ice storage air conditioning system. The device includes: a cooling parameter determination module, used for plate heat exchange based on the ice storage air conditioning system The outlet temperature of the device adjusts the parameters of the ice-storage air-conditioning system when switching the cooling mode; the cooling operation execution module is used to control the ice-storage air-conditioning system to perform cooling operations based on the parameters of the ice-storage air-conditioning system.

In a third aspect, an embodiment of the present invention also provides an electronic device, including a processor and a memory, the memory stores computer-executable instructions that can be executed by the processor, and the processor executes the computer-executable instructions to achieve the above-mentioned A control method for an ice storage air conditioning system.

In the fourth aspect, the embodiment of the present invention also provides a computer-readable storage medium, the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called and executed by a processor, the computer-executable instructions The processor is prompted to realize the above-mentioned control method of the ice storage air-conditioning system.

Embodiments of the present invention bring the following beneficial effects:

The embodiment of the present invention provides a control method, device and electronic equipment for an ice-storage air-conditioning system, which can adjust the parameters of the ice-storage air-conditioning system when switching cooling modes based on the outlet temperature of the plate heat exchanger of the ice-storage air-conditioning system, and based on The parameters of the ice storage air conditioning system control the cooling operation performed by the ice storage air conditioning system. In this way, the parameters of the ice-storage air-conditioning system when switching the cooling mode can be adjusted based on the outlet temperature of the plate heat exchanger, so as to ensure a stable outlet water temperature in the ice-storage air-conditioning system and improve user experience.

Other features and advantages of the present disclosure will be set forth in the following description, or some of the features and advantages can be inferred or unambiguously determined from the description, or can be known by implementing the above-mentioned techniques of the present disclosure.

In order to make the above-mentioned objects, features and advantages of the present disclosure more comprehensible, preferred embodiments will be described in detail below together with the accompanying drawings.

Description of drawings

In order to more clearly illustrate the specific implementation of the present invention or the technical solutions in the prior art, the following will briefly introduce the accompanying drawings that need to be used in the specific implementation or description of the prior art. Obviously, the accompanying drawings in the following description The drawings show some implementations of the present invention, and those skilled in the art can obtain other drawings based on these drawings without any creative effort.

Fig. 1 is a schematic diagram of an ice storage air conditioning system provided by an embodiment of the present invention;

Fig. 2 is a flow chart of a control method for an ice storage air-conditioning system provided by an embodiment of the present invention;

Fig. 3 is a flow chart of another ice storage air conditioning system control method provided by an embodiment of the present invention;

Fig. 4 is a schematic diagram of a control flow for switching from a dual-working condition cooling mode to an ice tank cooling mode provided by an embodiment of the present invention;

Fig. 5 is a schematic diagram of a control flow for switching from an ice tank cooling mode to a dual-working mode cooling mode according to an embodiment of the present invention;

Fig. 6 is a schematic structural diagram of a control device for an ice storage air-conditioning system provided by an embodiment of the present invention;

FIG. 7 is a schematic structural diagram of an electronic device provided by an embodiment of the present invention.

Detailed ways

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. the embodiment. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

At present, the ice storage air-conditioning system will formulate the operation mode of the cold source equipment according to the electricity price of the current period, such as the ice tank cooling mode, the dual-working condition host cooling mode and the combined cooling mode. In the process of mode switching, due to the delay in the start-up and shutdown of the chiller, the traditional control strategy cannot guarantee the stability of the water temperature control. Especially for places with strict requirements on temperature and humidity, such as factories and laboratories, it is usually required that the fluctuation range of the water supply temperature does not exceed ±0.5°C. The switching control logic of the ice storage air conditioning system will cause a large fluctuation range of the outlet water temperature, which will affect users. sense of experience.

Based on this, the embodiments of the present invention provide a control method, device, and electronic equipment for an ice storage air-conditioning system, and specifically relate to a method for intelligent non-disruptive switching control of an ice storage air-conditioning system, which can ensure the control of the outlet temperature of chilled water for plate replacement Stable, while minimizing the energy consumption of chilled water pumps.

In order to facilitate the understanding of this embodiment, a control method for an ice-storage air-conditioning system disclosed in an embodiment of the present invention is firstly introduced in detail.

Embodiment one:

An embodiment of the present invention provides a control method for an ice-storage air-conditioning system, which is applied to a controller of the ice-storage air-conditioning system.

Ice storage technology is to use low-cost electric ice storage to store cold energy during the low-valley time of the power grid at night. During the peak power consumption during the day, it dissolves water and supplies cooling with the refrigeration unit. During the peak load of the air conditioner during the day, the stored ice is stored A complete set of technologies that can be released in large quantities to meet the peak load needs of air conditioners. Referring to the schematic diagram of an ice-storage air-conditioning system shown in Figure 1, the ice-storage air-conditioning system includes a cold tank (also called a cold storage tank), a dual-working condition main engine (that is, a chiller unit including two chillers), two Chilled water pumps, two plate heat exchangers and a control box (that is, the controller of the ice storage air-conditioning system), can adjust the passage of each device through valves V1-V5. Among them, the control box can control each valve and two chilled water pumps.

Based on the above description, referring to the flow chart of a control method for an ice storage air conditioning system shown in Figure 2, the control method for the ice storage air conditioning system includes the following steps:

Step S202, adjusting the parameters of the ice storage air conditioning system when switching the cooling mode based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system.

The power time period may include a power wave flat period and a power peak period. Among them, the power wave flat section is generally 22:00-8:00, and the power wave peak section is generally 08:00-22:00. That is to say, late at night is the power wave flat section, and the daytime is the power wave peak section. The amount of ice in the ice storage tank of the ice storage air conditioning system refers to the amount of ice stored in the ice storage tank. Only when the ice storage tank stores a large amount of ice can the ice storage tank be used for cooling. Therefore, the cooling mode of the ice-storage air-conditioning system can be switched according to the current power time period and the ice-storage tank of the ice-storage air-conditioning system.

Wherein, the cooling mode of the ice storage air-conditioning system may include a dual-working-condition main engine cooling mode, an ice storage tank cooling mode, and a dual-working-condition main engine and ice storage tank combined cooling mode. Specifically, the cooling mode of the dual-working condition main engine uses chillers for cooling, and the ice storage tank does not supply cooling; the ice storage tank cooling mode uses ice storage tanks for cooling, and the chiller does not supply cooling; The combined cooling mode of the ice tank means that the ice storage tank and the chiller are used for cooling at the same time.

In the embodiment of the present invention, the parameters of the ice storage air conditioning system when switching the cooling mode are adjusted according to the outlet temperature of the plate heat exchanger of the ice storage air conditioning system. Specifically, the parameters of the ice-storage air-conditioning system may include the opening degrees of each valve (ie, the V1 valve to the V5 valve in FIG. 1 ) and the operating frequency of the chilled water pump.

Step S204, controlling the ice storage air conditioning system to perform a cooling operation based on the parameters of the ice storage air conditioning system.

After determining the parameters of the ice-storage air-conditioning system according to the outlet temperature of the plate heat exchanger, the ice-storage air-conditioning system can be controlled to perform cooling operation according to the parameters of the ice-storage air-conditioning system, so as to ensure that the temperature fluctuation of the water supply of the ice-storage air-conditioning system is small and improve User experience.

The control method of the ice storage air conditioning system provided by the embodiment of the present invention can adjust the parameters of the ice storage air conditioning system when switching the cooling mode based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system, and based on the temperature of the ice storage air conditioning system The parameters control the ice storage air conditioning system to perform cooling operation. In this way, the parameters of the ice-storage air-conditioning system when switching the cooling mode can be adjusted based on the outlet temperature of the plate heat exchanger, so as to ensure a stable outlet water temperature in the ice-storage air-conditioning system and improve user experience.

Embodiment two:

This embodiment provides another control method for an ice-storage air-conditioning system, which is implemented on the basis of the above-mentioned embodiments. The flow chart of another control method for an ice-storage air-conditioning system shown in FIG. 3 , this embodiment The control method of the ice storage air-conditioning system in the invention comprises the following steps:

Step S302, based on the current power time period and/or the amount of ice in the ice storage tank of the ice storage air conditioning system, switch the cooling mode of the ice storage air conditioning system.

The embodiment of the present invention provides a method for intelligent non-disturbance switching mode, for example: the cooling mode of the ice-storage air-conditioning system is switched from the cooling mode of the main engine under dual working conditions to the cooling mode of the ice storage tank; or, the cooling mode of the ice-storage air-conditioning system The mode is switched from the ice storage tank cooling mode to the dual working condition host cooling mode.

Step S304, adjusting parameters of the ice storage air conditioning system when switching cooling modes based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system.

For switching from the cooling mode of the dual-working condition main engine to the cooling mode of the ice storage tank, the following steps can be performed: keep the chilled water pump of the ice storage air conditioning system in working condition, adjust the valve and plate type of the ice storage tank in the ice storage air conditioning system The regulating valve of the heat exchanger; among them, the opening of the valve of the ice storage tank and the opening of the regulating valve of the plate heat exchanger are determined based on the outlet temperature of the plate heat exchanger; turn off the chiller unit and cooling water pump of the ice storage air conditioning system and cooling towers.

Referring to Fig. 4, a schematic diagram of the control process for switching from the dual-working condition cooling mode to the ice tank cooling mode, when the time period is in the power peak period and the ice volume in the ice storage tank is greater than the lower limit threshold (for example, 10%), the ice The cold storage air conditioning system is switched to the cooling mode of the ice storage tank. In order to ensure the uninterrupted operation of the cooling, the refrigeration pump continues to work, the controller can first open the V1 valve, and the opening of the V1 valve is adjusted according to the outlet temperature T3 of the secondary side of the plate replacement. . Secondly, the controller sends the main engine shutdown signal, and the plate replacement regulating valve is adjusted according to T3. After the controller collects the feedback that the main engine is shut down, it opens the V5 valve to let the chilled water flow directly into the ice tank. After a period of delay (usually set to 5min), close the refrigeration valve and cooling valve of the main engine respectively, and after the cooling valve is closed in place, turn off the cooling pump and cooling tower in turn. During the mode switching process, since the V1 valve has been performing PID adjustment according to the plate switching outlet temperature T3, it can ensure that the temperature fluctuation of T3 does not exceed ±0.5°C.

For switching from the ice storage tank cooling mode to the dual-working condition host cooling mode, the following steps can be performed: determine the number of chillers in the ice storage air-conditioning system after the mode switch; turn on the chillers and cooling water pumps of the number of machines in operation and cooling water towers; based on the water outlet temperature of the chiller and the outlet temperature of the plate heat exchanger, the opening of the valve of the ice storage tank in the ice storage air conditioning system is adjusted.

Referring to the schematic diagram of the control process for switching from an ice tank cooling mode to a dual-working mode cooling mode shown in Figure 5, the controller can establish an hourly load forecasting model based on historical load data and outdoor weather data: Q _t+1 = f(Q _t, T _db,out,t ,R _hout,t ,S _t ), where t represents the current moment, t+1 represents the next moment, Q is the air-conditioning load, T _db,out,t is the current moment Outdoor dry bulb temperature, R _h,out,t is the outdoor relative humidity at the current moment, S _t is the solar radiation intensity at the current moment.

Specifically, it is possible to determine the number of chillers in the ice-storage air-conditioning system after mode switching; the number of chillers, cooling water pumps, and cooling towers that are turned on; The opening degree of the valve of the ice storage tank in the air conditioning system.

The number of chillers in the ice storage air-conditioning system after mode switching can be determined by the following steps: Obtain the load of the ice storage air-conditioning system before the mode switching; based on the load before switching and the pre-established load forecasting model, determine the The forecasted load after the mode switching; the operating number of chillers of the ice storage air-conditioning system after the mode switching is determined based on the forecasted load after the mode switching.

One hour before the time period is switched from the ice tank cooling mode to the main engine cooling mode with dual working conditions, the BMS system first calculates the current The load of the air-conditioning system, and predict the air-conditioning load for the next hour according to the above equation. At the same time, based on the predicted air-conditioning load and the rated load of the hosts under dual working conditions, the number N of hosts to be turned on at the next moment can be determined. When the time period is to switch from the ice tank cooling mode to the dual-working condition host cooling mode, the BMS system will issue a control command based on the prediction result to open the corresponding freezing valve and cooling valve of the host to be opened in advance. When the freezing valve and cooling valve of each host are fully opened, close the V5 valve, and turn on the cooling tower and cooling pump corresponding to the host in turn. After a period of delay (usually set to 5min), the N hosts with dual working conditions are turned on.

Specifically, parameter adjustment can be performed through the following steps: obtain the actual load of the ice-storage air-conditioning system after the mode is switched; , or the ratio of the predicted load to the actual load after the mode switching is less than the preset ratio threshold, increase the opening of the ice storage tank valve in the ice storage air conditioning system; if the ratio of the predicted load to the actual load after the mode switching is greater than the ratio threshold , reduce the opening of the valve of the ice storage tank in the ice storage air conditioning system; if the absolute value of the difference between the water outlet temperature of the chiller minus the outlet temperature of the plate heat exchanger is less than the preset second threshold, close the ice storage air conditioning system Ice storage tank valve.

When the host outlet water temperature -T3 target value ≥ threshold 1 (set to 3°C), or, Qreal/Qpre<50% (actual cooling load/predicted cooling load), it means that the load rate of the host just loaded is relatively low, and the host outlet water temperature is high , at this time, in order to ensure the stability of T3 temperature, the V1 valve performs PID adjustment according to T3. When Qreal/Qpre>50%, it means that the host load has reached a certain stage. At this time, if the upper limit of the V1 valve is not limited, the ice tank will always bear part of the load, and the load of the host cannot continue to load. At this time, the opening degree of the valve of the ice storage tank in the ice storage air conditioning system can be determined by the following formula:

V1,ub=(Tch,out-Tice,out)/(Tch,out-T3+Tcomp);

Wherein, V1,ub is the upper limit value of the valve opening of the ice storage tank in the ice storage air conditioning system, that is, the upper limit value of the V1 valve. Tch,out is the outlet water temperature of the chiller, Tice,out is the outlet water temperature of the ice storage tank, T3 is the outlet temperature of the plate heat exchanger, Tcomp is the preset compensation temperature, and Tcomp can reflect the plate heat exchange temperature difference.

When |main engine outlet water temperature-T3 target value|<threshold value 2 (set to 0.5°C), it means that the dual-working condition main engine has lowered the water temperature to the required range, the V1 valve is closed, and the non-disturbance switching control process ends.

Step S306, controlling the ice storage air conditioning system to perform a cooling operation based on the parameters of the ice storage air conditioning system.

The above method provided by the embodiment of the present invention proposes an intelligent non-disruptive switching control method for an ice-storage air-conditioning system. When the cooling mode is switched (from the ice storage tank cooling mode to the dual-working condition host cooling or the dual-working condition host cooling is switched to the ice storage tank cooling mode), execute the corresponding intelligent non-disturbance switching control strategy, Ensure that the water temperature fluctuation range does not exceed ±0.5°C.

Embodiment three:

Corresponding to the above method embodiment, the embodiment of the present invention provides a control device for an ice storage air conditioning system, which is applied to a controller of an ice storage air conditioning system, see the structure of a control device for an ice storage air conditioning system shown in FIG. 6 Schematic diagram, the control device of the ice storage air conditioning system includes:

The cooling parameter determination module 61 is used to adjust the parameters of the ice storage air conditioning system when switching the cooling mode based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system;

The cooling operation execution module 62 is configured to control the ice storage air conditioning system to perform the cooling operation based on the parameters of the ice storage air conditioning system.

The control device of the ice storage air conditioning system provided by the embodiment of the present invention can adjust the parameters of the ice storage air conditioning system when switching the cooling mode based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system, and based on the temperature of the ice storage air conditioning system The parameters control the ice storage air conditioning system to perform cooling operation. In this way, the parameters of the ice-storage air-conditioning system when switching the cooling mode can be adjusted based on the outlet temperature of the plate heat exchanger, so as to ensure a stable outlet water temperature in the ice-storage air-conditioning system and improve user experience.

The cooling mode of the ice-storage air-conditioning system is switched from the cooling mode of the main engine under dual working conditions to the cooling mode of the ice-storage tank; the above-mentioned cooling parameter determination module is used to maintain the working state of the chilled water pump of the ice-storage air-conditioning system and adjust the ice-storage air-conditioning system. The valve of the ice storage tank and the regulating valve of the plate heat exchanger in the system; the opening of the valve of the ice storage tank and the regulating valve of the plate heat exchanger are determined based on the outlet temperature of the plate heat exchanger; Chillers, cooling water pumps and cooling water towers for cold storage air conditioning systems.

The cooling mode of the ice-storage air-conditioning system is switched from the ice-storage tank cooling mode to the dual-mode host cooling mode; the above-mentioned cooling parameter determination module is used to determine the number of chillers in the ice-storage air-conditioning system after mode switching; Turn on the number of chillers, cooling water pumps and cooling towers in operation; adjust the opening of the valve of the ice storage tank in the ice storage air conditioning system based on the outlet water temperature of the chiller and the outlet temperature of the plate heat exchanger.

The above cooling parameter determination module is used to obtain the load of the ice storage air conditioning system before mode switching; based on the load before switching and the pre-established load forecasting model, determine the predicted load after the ice storage air conditioning system mode switching; The forecast load determines the number of chillers in the ice storage air-conditioning system after mode switching.

The above-mentioned cooling parameter determination module is used to obtain the actual load of the ice storage air-conditioning system after mode switching; if the difference between the water outlet temperature of the chiller minus the outlet temperature of the plate heat exchanger is greater than the preset first threshold, or the mode The ratio of the predicted load to the actual load after switching is less than the preset ratio threshold, and the valve opening of the ice storage tank in the ice storage air-conditioning system is increased; if the ratio of the predicted load to the actual load after the mode switching is greater than the ratio threshold, the ice The opening of the valve of the ice storage tank in the cold storage air conditioning system; if the absolute value of the difference between the water outlet temperature of the chiller minus the outlet temperature of the plate heat exchanger is less than the preset second threshold value, close the ice storage tank in the ice storage air conditioning system valve.

The above-mentioned cooling parameter determination module is used to determine the opening degree of the valve of the ice storage tank in the ice storage air conditioning system through the following formula: V1,ub=(Tch,out-Tice,out)/(Tch,out-T3+Tcomp ); among them, V1, ub is the upper limit value of the valve opening of the ice storage tank in the ice storage air-conditioning system, Tch, out is the outlet water temperature of the chiller, Tice, out is the outlet water temperature of the ice storage tank, and T3 is the plate type The outlet temperature of the heat exchanger, Tcomp is the preset compensation temperature.

The above device also includes: a cooling mode switching module, configured to switch the cooling mode of the ice storage air conditioning system based on the current power time period and/or the amount of ice in the ice storage tank of the ice storage air conditioning system.

The above-mentioned cooling mode switching module is used to switch the cooling mode of the ice storage air conditioning system from the cooling mode of the main engine under dual working conditions to the cooling mode of the ice storage tank; or, the cooling mode of the ice storage air conditioning system is supplied by the ice storage tank The mode is switched to the dual working condition host cooling mode.

Those skilled in the art can clearly understand that for the convenience and brevity of the description, the specific working process of the control device of the ice storage air conditioning system described above can refer to the corresponding The process will not be repeated here.

Embodiment four:

The embodiment of the present invention also provides an electronic device, which is used to run the control method of the ice-storage air-conditioning system; refer to the schematic structural diagram of an electronic device shown in FIG. 7 , the electronic device includes a memory 100 and a processor 101, wherein The memory 100 is used to store one or more computer instructions, and the one or more computer instructions are executed by the processor 101 to implement the above method for controlling the ice-storage air-conditioning system.

Further, the electronic device shown in FIG. 7 further includes a bus 102 and a communication interface 103 , and the processor 101 , the communication interface 103 and the memory 100 are connected through the bus 102 .

Wherein, the memory 100 may include a high-speed random access memory (RAM, Random Access Memory), and may also include a non-volatile memory (non-volatile memory), such as at least one disk memory. The communication connection between the system network element and at least one other network element is realized through at least one communication interface 103 (which may be wired or wireless), and the Internet, wide area network, local network, metropolitan area network, etc. can be used. The bus 102 may be an ISA bus, a PCI bus, or an EISA bus, etc. The bus can be divided into address bus, data bus, control bus and so on. For ease of representation, only one double-headed arrow is used in FIG. 7 , but it does not mean that there is only one bus or one type of bus.

The processor 101 may be an integrated circuit chip with signal processing capability. In the implementation process, each step of the above method can be completed by an integrated logic circuit of hardware in the processor 101 or instructions in the form of software. The above-mentioned processor 101 can be a general-purpose processor, including a central processing unit (Central Processing Unit, referred to as CPU), a network processor (Network Processor, referred to as NP), etc.; it can also be a digital signal processor (Digital Signal Processor, referred to as DSP) , Application Specific Integrated Circuit (ASIC for short), Field Programmable Gate Array (Field-Programmable Gate Array, FPGA for short) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. Various methods, steps and logic block diagrams disclosed in the embodiments of the present invention may be implemented or executed. A general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like. The steps of the methods disclosed in the embodiments of the present invention may be directly implemented by a hardware decoding processor, or implemented by a combination of hardware and software modules in the decoding processor. The software module can be located in a mature storage medium in the field such as random access memory, flash memory, read-only memory, programmable read-only memory or electrically erasable programmable memory, register. The storage medium is located in the memory 100, and the processor 101 reads the information in the memory 100, and completes the steps of the methods in the foregoing embodiments in combination with its hardware.

An embodiment of the present invention also provides a computer-readable storage medium, the computer-readable storage medium stores computer-executable instructions, and when the computer-executable instructions are called and executed by a processor, the computer-executable instructions cause the processor to implement For the control method of the above-mentioned ice-storage air-conditioning system, the specific implementation may refer to the method embodiment, which will not be repeated here.

The computer program product of the ice storage air-conditioning system control method, device, and electronic equipment provided by the embodiments of the present invention includes a computer-readable storage medium storing program codes, and the instructions included in the program codes can be used to execute the steps in the preceding method embodiments. For the specific implementation of the method, reference may be made to the method embodiments, which will not be repeated here.

Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working process of the system and/or device described above can refer to the corresponding process in the foregoing method embodiment, and details are not repeated here.

In addition, in the description of the embodiments of the present invention, unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be interpreted in a broad sense, for example, it can be a fixed connection or a detachable connection , or integrally connected; it may be mechanically connected or electrically connected; it may be directly connected or indirectly connected through an intermediary, and it may be the internal communication of two components. Those of ordinary skill in the art can understand the specific meanings of the above terms in the present invention in specific situations.

If the functions described above are realized in the form of software function units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the essence of the technical solution of the present invention or the part that contributes to the prior art or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or a network device, etc.) execute all or part of the steps of the methods described in various embodiments of the present invention. The aforementioned storage medium includes: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes. .

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" etc. The indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, use a specific orientation construction and operation, therefore, should not be construed as limiting the invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and should not be construed as indicating or implying relative importance.

Finally, it should be noted that: the above-described embodiments are only specific implementations of the present invention, used to illustrate the technical solutions of the present invention, rather than limiting them, and the scope of protection of the present invention is not limited thereto, although referring to the foregoing The embodiment has described the present invention in detail, and those of ordinary skill in the art should understand that any person familiar with the technical field can still modify the technical solutions described in the foregoing embodiments within the technical scope disclosed in the present invention Changes can be easily thought of, or equivalent replacements are made to some of the technical features; and these modifications, changes or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention, and should be covered by the scope of the present invention. within the scope of protection. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims (11)

1. A control method of an ice storage air conditioning system, applied to a controller of the ice storage air conditioning system, the method comprising:

adjusting parameters of the ice storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system;

and controlling the ice cold storage air conditioning system to execute cold supply operation based on the parameters of the ice cold storage air conditioning system.

2. The method of claim 1, wherein the ice storage air conditioning system cold supply mode is switched from a dual-station host cold supply mode to an ice storage tank cold supply mode; the step of adjusting parameters of the ice storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system comprises the following steps:

maintaining the working state of a chilled water pump of the ice storage air conditioning system, and adjusting a valve of an ice storage tank and an adjusting valve of the plate heat exchanger in the ice storage air conditioning system; the opening of the valve of the ice storage tank and the opening of the regulating valve of the plate heat exchanger are determined based on the outlet temperature of the plate heat exchanger;

and closing a water chilling unit, a cooling water pump and a cooling water tower of the ice cold storage air conditioning system.

3. The method of claim 1, wherein the ice storage air conditioning system cold supply mode is switched from an ice storage tank cold supply mode to a dual-station host cold supply mode; the step of adjusting parameters of the ice storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice storage air conditioning system comprises the following steps:

determining the running number of water chilling units of the ice storage air conditioning system after the mode switching;

starting the water chilling units, the cooling water pumps and the cooling water towers with the running number;

and adjusting the opening of a valve of an ice storage tank in the ice storage air conditioning system based on the outlet temperature of the water chilling unit and the outlet temperature of the plate heat exchanger.

4. The method of claim 3, wherein the step of determining the number of operation units of the ice storage air conditioning system after the mode switching comprises:

acquiring the load before the mode switching of the ice storage air conditioning system;

determining a predicted load of the ice storage air conditioning system after mode switching based on the load before switching and a pre-established load prediction model;

and determining the number of operation units of the ice storage air conditioning system after the mode switching based on the predicted load after the mode switching.

5. The method of claim 4, wherein the step of adjusting the opening of the valve of the ice storage tank in the ice storage air conditioning system based on the outlet temperature of the water chiller and the outlet temperature of the plate heat exchanger comprises:

acquiring the actual load of the ice storage air conditioning system after the mode switching;

if the difference of the outlet temperature of the plate heat exchanger subtracted by the outlet temperature of the water chilling unit is larger than a preset first threshold value, or the ratio of the predicted load after the mode switching to the actual load is smaller than a preset ratio threshold value, the opening of a valve of an ice storage tank in the ice storage air conditioning system is improved;

if the ratio of the predicted load to the actual load after the mode switching is greater than the ratio threshold, reducing the opening of a valve of an ice storage tank in the ice storage air conditioning system;

and if the absolute value of the difference between the water outlet temperature of the water chilling unit and the outlet temperature of the plate heat exchanger is smaller than a preset second threshold value, closing a valve of an ice storage tank in the ice storage air conditioning system.

6. The method of claim 5, wherein the step of reducing the opening of a valve of an ice storage tank in the ice storage air conditioning system comprises:

determining the opening degree of a valve of an ice storage tank in the ice storage air conditioning system by the following formula:

V1,ub＝(Tch,out-Tice,out)/(Tch,out-T3+Tcomp)；

wherein V1, ub is the upper limit value of the opening degree of a valve of an ice storage tank in the ice storage air conditioning system, tch, out is the water outlet temperature of the water chilling unit, tice, out is the water outlet temperature of the ice storage tank, T3 is the outlet temperature of the plate heat exchanger, and Tcomp is the preset compensation temperature.

7. The method according to claim 1, wherein the method further comprises:

and switching the cooling mode of the ice storage air conditioning system based on the current power time period and/or the ice storage tank ice amount of the ice storage air conditioning system.

8. The method of claim 7, wherein the step of switching the cooling mode of the ice thermal storage air conditioning system comprises:

the cold supply mode of the ice cold storage air conditioning system is switched from a double-station host machine cold supply mode to an ice storage tank cold supply mode;

or the cooling mode of the ice storage air conditioning system is switched from the ice storage tank cooling mode to the double-station host cooling mode.

9. A control device for an ice thermal storage air conditioning system, the device comprising:

the cooling parameter determining module is used for adjusting parameters of the ice cold storage air conditioning system when the cooling mode is switched based on the outlet temperature of the plate heat exchanger of the ice cold storage air conditioning system;

and the cooling operation execution module is used for controlling the ice cold storage air conditioning system to execute cooling operation based on the parameters of the ice cold storage air conditioning system.

10. An electronic device comprising a processor and a memory, the memory storing computer-executable instructions executable by the processor, the processor executing the computer-executable instructions to implement the method of controlling an ice thermal air conditioning system of any one of claims 1 to 8.

11. A computer readable storage medium storing computer executable instructions which, when invoked and executed by a processor, cause the processor to implement the method of controlling an ice thermal storage air conditioning system according to any one of claims 1 to 8.

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