Control Method, Device and Electronic Equipment of Ice Thermal Storage Air Conditioning System

Abstract

The present invention provides a control method, device and electronic equipment for an ice storage air-conditioning system. Among them, 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; controlling the ice storage air-conditioning system to perform a cooling operation based on the parameters of 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 the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning systems, and in particular, to a control method, device, and electronic device for an ice storage air conditioning system. Background Art

[0002] An ice storage air conditioning system is to transfer the heat in the ice storage medium by a refrigeration device during the time when there is no need or little cooling demand (such as at night), and then use this cold quantity during the peak period of air conditioning or industrial cooling. By applying the ice storage technology, the operation time of the refrigeration device is shifted. On the one hand, cheap electricity at night can be utilized, and on the other hand, the peak electricity load during the day is reduced, achieving the purpose of peak load shifting and valley filling of electricity and saving electricity costs. The difficulty of the ice storage air conditioning system lies in ensuring the stability of the water supply temperature during the switching process between the dual-mode host and the ice tank.

[0003] Generally, the ice storage air conditioning system formulates the operation mode of the cold source device according to the electricity price of the current period, such as the ice tank cooling mode, the dual-mode host cooling mode, and the combined cooling mode. During the switching process of the modes, due to the start-up and shutdown of the chiller having a delay, the traditional control strategy cannot ensure the stable control of the water temperature. Especially for places such as factories and laboratories with strict requirements for temperature and humidity, the fluctuation range of the water supply temperature is usually required not to 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, affecting the user experience. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a control method, device, and electronic device for an ice storage air conditioning system to ensure the outlet water temperature in the ice storage air conditioning system is stable and improve the user experience.

[0005] In a first aspect, 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. 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; controlling the ice storage air conditioning system to perform a cooling operation based on the parameters of the ice storage air conditioning system.

[0006] In a preferred embodiment of the present application, the cooling mode of the ice storage air conditioning system is switched from the dual-mode host cooling mode to the ice storage tank cooling mode. The step of 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 includes: 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; wherein, the opening degree of the valve of the ice storage tank and the opening degree of the regulating valve of the plate heat exchanger are both determined based on the outlet temperature of the plate heat exchanger; shutting down the chiller, cooling water pump, and cooling water tower of the ice storage air conditioning system.

[0007] 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-condition main unit cooling mode; the steps of 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 include: determining the number of operating units of the chiller of the ice storage air-conditioning system after the mode switch;

[0008] Starting the chillers, cooling water pumps and cooling water towers of the determined number of operating units; adjusting the opening degree 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.

[0009] In a preferred embodiment of the present application, the above steps of determining the number of operating units of the chiller of the ice storage air-conditioning system after the mode switch include: obtaining the load before the mode switch of the ice storage air-conditioning system; determining the predicted load after the mode switch of the ice storage air-conditioning system based on the load before the switch and a pre-established load prediction model; determining the number of operating units of the chiller of the ice storage air-conditioning system after the mode switch based on the predicted load after the mode switch.

[0010] In a preferred embodiment of the present application, the above steps of adjusting the opening degree 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 include: obtaining the actual load of the ice storage air-conditioning system after the mode switch; if the difference between the outlet water temperature of the chiller and the outlet temperature of the plate heat exchanger is greater than a preset first threshold, or the ratio of the predicted load after the mode switch to the actual load is less than a preset ratio threshold, increasing the opening degree of the valve of the ice storage tank in the ice storage air-conditioning system; if the ratio of the predicted load after the mode switch to the actual load is greater than the ratio threshold, decreasing the opening degree of the valve of the ice storage tank in the ice storage air-conditioning system; if the absolute value of the difference between the outlet water temperature of the chiller and the outlet temperature of the plate heat exchanger is less than a preset second threshold, closing the valve of the ice storage tank in the ice storage air-conditioning system.

[0011] In a preferred embodiment of the present application, the above steps of decreasing the opening degree of the valve of the ice storage tank in the ice storage air-conditioning system include: determining 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); where V1,ub is the upper limit value of the opening degree 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 a preset compensation temperature.

[0012] 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 ice amount in the ice storage tank of the ice storage air-conditioning system.

[0013] In a preferred embodiment of the present application, the step of switching the cooling mode of the ice storage air-conditioning system includes: the cooling mode of the ice storage air-conditioning system is switched from the dual-mode host cooling mode to the ice storage tank cooling mode; or, 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.

[0014] In a second aspect, an embodiment of the present invention further provides a control device for an ice storage air-conditioning system, which is applied to a controller of the ice storage air-conditioning system. The device includes: a cooling parameter determination module, configured 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; a cooling operation execution module, configured to control the ice storage air-conditioning system to execute a cooling operation based on the parameters of the ice storage air-conditioning system.

[0015] In a third aspect, an embodiment of the present invention further 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 implement the control method of the above ice storage air-conditioning system.

[0016] In a fourth aspect, an embodiment of the present invention further provides a computer-readable storage medium, which stores computer-executable instructions. When the computer-executable instructions are called and executed by a processor, the computer-executable instructions cause the processor to implement the control method of the above ice storage air-conditioning system.

[0017] The embodiments of the present invention bring the following beneficial effects:

[0018] A control method, device and electronic device for an ice storage air-conditioning system provided by an 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 control the ice storage air-conditioning system to execute a cooling operation based on the parameters of 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 the stable outlet water temperature of the ice storage air-conditioning system and improve the user experience.

[0019] Other features and advantages of the present disclosure will be described in the subsequent description, or, some features and advantages can be inferred from the description or determined without doubt, or can be learned by implementing the above technologies of the present disclosure.

[0020] To make the above objects, features, and advantages of the present disclosure more obvious and understandable, the following specifically presents preferred embodiments and, in conjunction with the accompanying drawings, provides a detailed description as follows. Description of the Drawings

[0021] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0022] Figure 1 Schematic diagram of an ice storage air-conditioning system provided by an embodiment of the present invention;

[0023] Figure 2 Flowchart of a control method for an ice storage air-conditioning system provided by an embodiment of the present invention;

[0024] Figure 3 Flowchart of another control method for an ice storage air-conditioning system provided by an embodiment of the present invention;

[0025] Figure 4 Schematic diagram of a control process for switching from a dual-mode cooling mode to an ice tank cooling mode provided by an embodiment of the present invention;

[0026] Figure 5 Schematic diagram of a control process for switching from an ice tank cooling mode to a dual-mode cooling mode provided by an embodiment of the present invention;

[0027] Figure 6 Schematic diagram of the structure of a control device for an ice storage air-conditioning system provided by an embodiment of the present invention;

[0028] Figure 7 Schematic diagram of the structure of an electronic device provided by an embodiment of the present invention. Detailed Embodiments

[0029] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the following will clearly and completely describe the technical solutions of the present invention in conjunction with the drawings. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of protection of the present invention.

[0030] At present, the ice storage air-conditioning system formulates the operation mode of the cold source equipment according to the electricity price in the current period, such as the ice tank cooling mode, the dual-condition main engine cooling mode and the combined cooling mode. During the process of mode switching, due to the start-up and shutdown delays of the chiller, the traditional control strategy cannot ensure the stable control of the water temperature. Especially for places such as factories and laboratories with strict requirements for temperature and humidity, the fluctuation range of the supply water temperature is usually required not to 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, affecting the user experience.

[0031] Based on this, a control method, device and electronic equipment for an ice storage air-conditioning system provided by an embodiment of the present invention specifically relate to a method for intelligent disturbance-free switching control of an ice storage air-conditioning system, which can ensure the stable control of the outlet temperature of the plate heat exchanger chilled water and at the same time minimize the energy consumption of the chilled water pump.

[0032] To facilitate the understanding of this embodiment, first, a control method for an ice storage air-conditioning system disclosed in an embodiment of the present invention will be introduced in detail.

[0033] Embodiment 1:

[0034] 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.

[0035] Ice storage technology is a complete set of technologies that uses the low-voltage period of the power grid at night to make ice and store cold energy with low-cost electricity, melts the water during the peak electricity consumption period during the day, and jointly supplies cooling with the chiller. During the peak load period of the air conditioner during the day, the stored ice cold energy is released to meet the needs of the air conditioner peak load. Refer to Figure 1 As shown in the schematic diagram of an ice storage air-conditioning system, the ice storage air-conditioning system includes a cold tank (which can also be called a cold storage tank), a dual-condition main engine (i.e., a chiller including 2 chillers), two chilled water pumps, two plate heat exchangers and a control box (i.e., the controller of the ice storage air-conditioning system), and the passages of each device can be adjusted through valves V1-V5. Among them, the control box can control each valve and two chilled water pumps.

[0036] Based on the above description, refer to Figure 2 As shown in the flowchart of a control method for an ice storage air-conditioning system, the control method for the ice storage air-conditioning system includes the following steps:

[0037] Step S202, 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.

[0038] The power time period may include a power flat period and a power peak period. Among them, the power flat period is generally from 22:00 to 8:00, and the power peak period is generally from 08:00 to 22:00. That is, the late night is the power flat period, and the daytime is the power peak period. The ice quantity in the ice storage tank of the ice storage air-conditioning system, that is, the amount of ice stored in the ice storage tank, can only be used for cooling by the ice storage tank when the amount of ice stored in the ice storage tank is large. 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.

[0039] Among them, the cooling mode of the ice storage air-conditioning system may include a dual-condition main unit cooling mode, an ice storage tank cooling mode, and a combined cooling mode of the dual-condition main unit and the ice storage tank. Specifically, the dual-condition main unit cooling mode means using the chiller for cooling and the ice storage tank does not supply cooling; the ice storage tank cooling mode means using the ice storage tank for cooling and the chiller does not supply cooling; the combined cooling mode of the dual-condition main unit and the ice storage tank means using the ice storage tank and the chiller for cooling at the same time.

[0040] In the embodiment of the present invention, the parameters of the ice storage air-conditioning system are adjusted when switching the cooling mode 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 (i.e., Figure 1 valve V1-V5 in it) and the operating frequency of the chilled water pump.

[0041] 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.

[0042] 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 a cooling operation according to the parameters of the ice storage air-conditioning system, so as to ensure that the water supply temperature fluctuation of the ice storage air-conditioning system is small and improve the user experience.

[0043] A control method for an ice storage air-conditioning system provided by an 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 control the ice storage air-conditioning system to perform a cooling operation based on the parameters of the ice storage air-conditioning system. In this way, the parameters of the ice storage air-conditioning system can be adjusted when switching the cooling mode based on the outlet temperature of the plate heat exchanger, so as to ensure the stable water outlet temperature in the ice storage air-conditioning system and improve the user experience.

[0044] Embodiment 2:

[0045] This embodiment provides another control method for an ice storage air-conditioning system. This method is implemented on the basis of the above embodiment, as shown in Figure 3 the flowchart of another control method for an ice storage air-conditioning system shown. The control method for the ice storage air-conditioning system in this embodiment includes the following steps:

[0046] Step S302: Based on the current power time period and / or the ice amount in the ice storage tank of the ice storage air-conditioning system, switch the cooling mode of the ice storage air-conditioning system.

[0047] The embodiment of the present invention provides a method for intelligent seamless switching mode. For example, the cooling mode of the ice storage air-conditioning system is switched from the dual-condition main unit cooling mode to the ice storage tank cooling mode; or, the cooling mode of the ice storage air-conditioning system is switched from the ice storage tank cooling mode to the dual-condition main unit cooling mode.

[0048] Step S304: Based on the outlet temperature of the plate heat exchanger of the ice storage air-conditioning system, adjust the parameters of the ice storage air-conditioning system when switching the cooling mode.

[0049] For the switching from the dual-condition main unit cooling mode to the ice storage tank cooling mode, it can be executed through the following steps: Keep the working state of the chilled water pump of the ice storage air-conditioning system, and adjust the valve of the ice storage tank and the regulating valve of the plate heat exchanger in the ice storage air-conditioning system; wherein, the opening degrees of the valve of the ice storage tank and the regulating valve of the plate heat exchanger are both determined based on the outlet temperature of the plate heat exchanger; Shut down the chiller, cooling water pump and cooling tower of the ice storage air-conditioning system.

[0050] See Figure 4 As shown in the schematic diagram of the control process for switching the dual-condition cooling mode to the ice tank cooling mode, when the time period is in the power peak period and the ice amount in the ice storage tank is greater than the lower limit threshold (for example, 10%), the ice storage air-conditioning system is switched to the ice storage tank cooling mode. To ensure uninterrupted operation of the cooling, the chilled water pump continues to operate. The controller can first open the V1 valve, and the opening degree of the V1 valve is adjusted according to the outlet temperature T3 of the secondary side of the plate heat exchanger. Secondly, the controller sends a signal to shut down the main unit, and the regulating valve of the plate heat exchanger is adjusted according to T3. After the controller collects the feedback that the main unit shutdown is completed, open the V5 valve to allow the chilled water to flow directly into the ice tank. After a time delay (usually set to 5 minutes), close the chilled water valve and cooling valve of the main unit respectively. After the cooling valve is closed in place, close the cooling water pump and cooling tower in sequence. During the mode switching process, since the V1 valve has been performing PID regulation according to the outlet temperature T3 of the plate heat exchanger, it can ensure that the temperature fluctuation of T3 does not exceed ±0.5°C.

[0051] For the switching from the ice storage tank cooling mode to the dual-condition main unit cooling mode, it can be executed through the following steps: Determine the number of operating units of the chiller of the ice storage air-conditioning system after the mode switching; Start the chiller, cooling water pump and cooling tower of the operating units; Based on the outlet temperature of the chiller and the outlet temperature of the plate heat exchanger, adjust the opening degree of the valve of the ice storage tank in the ice storage air-conditioning system.

[0052] See Figure 5Schematic diagram of the control process for switching the ice tank cooling mode to the dual-condition cooling mode. The controller can establish an hourly load prediction 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 time, t + 1 represents the next time, Q is the air-conditioning load, T db,out,t is the outdoor dry-bulb temperature at the current time, R h,out,t is the outdoor relative humidity at the current time, S t is the solar radiation intensity at the current time.

[0053] Specifically, the number of operating units of the chiller in the ice storage air-conditioning system after mode switching can be determined; the operating units of the chiller, cooling water pump, and cooling water tower are started; the opening degree of the valve of the ice storage tank in the ice storage air-conditioning system is adjusted based on the outlet water temperature of the chiller and the outlet temperature of the plate heat exchanger.

[0054] The number of operating units of the chiller in the ice storage air-conditioning system after mode switching can be determined through the following steps: Obtain the load before mode switching of the ice storage air-conditioning system; Based on the load before switching and the pre-established load prediction model, determine the predicted load after mode switching of the ice storage air-conditioning system; Determine the number of operating units of the chiller in the ice storage air-conditioning system after mode switching based on the predicted load after mode switching.

[0055] When the time period is about to switch from the ice tank cooling mode to the dual-condition main unit cooling mode 1 hour before, the BMS system first calculates the load of the current air-conditioning system according to the temperature difference T4 - T3 between the supply and return water of the secondary side chilled water and the secondary side chilled water flow Mch, and predicts 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 dual-condition main unit, the number of starting units N of the main unit at the next moment can be judged. When the time period is about to switch from the ice tank cooling mode to the dual-condition main unit cooling mode, the BMS system issues a control instruction according to the prediction result to open the corresponding chilled water valve and cooling valve of the main unit to be started in advance. After the chilled water valve and cooling valve of each main unit are fully opened, close the V5 valve, and start the corresponding cooling tower and cooling pump of the main unit in sequence. After a time delay (usually set to 5 min), start the N dual-condition main units.

[0056] Specifically, the parameter adjustment can be carried out through the following steps: Obtain the actual load of the ice storage air-conditioning system after mode switching; if the difference between the outlet temperature of the chiller and the outlet temperature of the plate heat exchanger is greater than a preset first threshold, or the ratio of the predicted load to the actual load after mode switching is less than a preset ratio threshold, increase the opening degree 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 ratio threshold, decrease the opening degree of the valve of the ice storage tank in the ice storage air-conditioning system; if the absolute value of the difference between the outlet temperature of the chiller and the outlet temperature of the plate heat exchanger is less than a preset second threshold, close the valve of the ice storage tank in the ice storage air-conditioning system.

[0057] When the outlet temperature of the host - T3 target value ≥ threshold 1 (set to 3°C), or, Qreal / Qpre < 50% (actual cooling load / predicted cooling load), it indicates that the load rate of the host just after loading is relatively low and the outlet temperature of the host is relatively high. At this time, in order to ensure the stability of the T3 temperature, the V1 valve is PID-regulated according to T3. When Qreal / Qpre > 50%, it indicates that the host load has been loaded to a certain stage. At this time, if the upper limit of the V1 valve is not restricted, the ice tank will always bear a part of the load and the host load cannot be continuously loaded. 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:

[0058] V1,ub = (Tch,out - Tice,out) / (Tch,out - T3 + Tcomp);

[0059] Among them, V1,ub is the upper limit value of the opening degree of the valve 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 temperature of the chiller, Tice,out is the outlet 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.

[0060] When |the outlet temperature of the host - T3 target value| < threshold 2 (set to 0.5°C), it indicates that the dual-mode host has reduced the water temperature to the required range, the V1 valve is closed, and the seamless switching control process ends.

[0061] Step S306, control the ice storage air-conditioning system to perform a cooling operation based on the parameters of the ice storage air-conditioning system.

[0062] The above method provided by the embodiments of the present invention proposes an intelligent seamless 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-mode host cooling or from the dual-mode host cooling to the ice storage tank cooling mode), the corresponding intelligent seamless switching control strategy is executed to ensure that the water temperature fluctuation range does not exceed ±0.5°C.

[0063] Embodiment 3:

[0064] Corresponding to the above method embodiment, an embodiment of the present invention provides a control device for an ice storage air-conditioning system, which is applied to a controller of the ice storage air-conditioning system. Refer to Figure 6 the structural schematic diagram of a control device for an ice storage air-conditioning system shown in

[0065] A cooling parameter determination module 61, configured 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;

[0066] A cooling operation execution module 62, configured to control the ice storage air-conditioning system to execute a cooling operation based on the parameters of the ice storage air-conditioning system.

[0067] The control device for an 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 control the ice storage air-conditioning system to execute a cooling operation based on the parameters of 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 the stable water outlet temperature of the ice storage air-conditioning system and improve the user experience.

[0068] The cooling mode of the ice storage air-conditioning system is switched from the dual-condition host cooling mode to the ice storage tank cooling mode; the above cooling parameter determination module is configured to maintain the working state of the chilled water pump of the ice storage air-conditioning system, adjust the valve of the ice storage tank and the regulating valve of the plate heat exchanger in the ice storage air-conditioning system; wherein, the opening degrees of the valve of the ice storage tank and the regulating valve of the plate heat exchanger are both determined based on the outlet temperature of the plate heat exchanger; turn off the chiller, cooling water pump and cooling water tower of the ice storage air-conditioning system.

[0069] The cooling mode of the ice storage air-conditioning system is switched from the ice storage tank cooling mode to the dual-condition host cooling mode; the above cooling parameter determination module is configured to determine the number of operating units of the chiller of the ice storage air-conditioning system after the mode switch; turn on the chiller, cooling water pump and cooling water tower of the determined number of operating units; adjust the opening degree of the valve of the ice storage tank in the ice storage air-conditioning system based on the outlet temperature of the chiller and the outlet temperature of the plate heat exchanger.

[0070] The above cooling parameter determination module is configured to obtain the load before the mode switch of the ice storage air-conditioning system; determine the predicted load of the ice storage air-conditioning system after the mode switch based on the load before the switch and a pre-established load prediction model; determine the number of operating units of the chiller of the ice storage air-conditioning system after the mode switch based on the predicted load after the mode switch.

[0071] The above 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 outlet temperature of the chiller and the outlet temperature of the plate heat exchanger is greater than a preset first threshold, or the ratio of the predicted load to the actual load after mode switching is less than a preset ratio threshold, increase the opening degree 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 ratio threshold, decrease the opening degree of the valve of the ice storage tank in the ice storage air conditioning system; if the absolute value of the difference between the outlet temperature of the chiller and the outlet temperature of the plate heat exchanger is less than a preset second threshold, close the valve of the ice storage tank in the ice storage air conditioning system.

[0072] The above 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); where V1,ub is the upper limit value of the opening degree of the valve of the ice storage tank in the ice storage air conditioning system, Tch,out is the outlet temperature of the chiller, Tice,out is the outlet temperature of the ice storage tank, T3 is the outlet temperature of the plate heat exchanger, and Tcomp is a preset compensation temperature.

[0073] The above device further includes: a cooling mode switching module, which is used to switch the cooling mode of the ice storage air conditioning system based on the current power time period and / or the ice amount in the ice storage tank of the ice storage air conditioning system.

[0074] The above cooling mode switching module is used to switch the cooling mode of the ice storage air conditioning system from the dual-mode host cooling mode to the ice storage tank cooling mode; or, switch the cooling mode of the ice storage air conditioning system from the ice storage tank cooling mode to the dual-mode host cooling mode.

[0075] Those skilled in the art can clearly understand that for the convenience and simplicity of description, the specific working process of the above-described control device of the ice storage air conditioning system can refer to the corresponding process in the embodiment of the control method of the ice storage air conditioning system described above, and will not be elaborated here.

[0076] Embodiment 4:

[0077] The embodiment of the present invention further provides an electronic device for running the above control method of the ice storage air conditioning system; see Figure 7 The structural schematic diagram of an electronic device shown, 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 control method of the ice storage air conditioning system.

[0078] Further, Figure 7The electronic device shown also includes a bus 102 and a communication interface 103. The processor 101, the communication interface 103, and the memory 100 are connected through the bus 102.

[0079] Among them, the memory 100 may include high-speed random access memory (RAM), and may also include non-volatile memory, such as at least one disk memory. Through at least one communication interface 103 (which can be wired or wireless), a communication connection is realized between this system network element and at least one other network element. The Internet, wide area network, local area network, metropolitan area network, etc. can be used. The bus 102 can be an ISA bus, a PCI bus, an EISA bus, etc. The bus can be divided into an address bus, a data bus, a control bus, etc. For the sake of simplicity of representation, Figure 7 only a single bidirectional arrow is used in the figure, but it does not mean that there is only one bus or one type of bus.

[0080] The processor 101 may be an integrated circuit chip with signal processing capabilities. In the implementation process, the steps of the above method can be completed by the integrated logic circuit in the hardware of the processor 101 or by instructions in software form. The above-mentioned processor 101 can be a general-purpose processor, including a central processing unit (CPU for short), a network processor (NP for short), etc.; it can also be a digital signal processor (DSP for short), an application specific integrated circuit (ASIC for short), a field-programmable gate array (FPGA for short), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components. It can implement or execute the various methods, steps, and logic block diagrams disclosed in the embodiments of the present invention. The general-purpose processor can be a microprocessor or the processor can also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present invention can be directly embodied as being executed and completed by a hardware decoding processor, or 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 art such as random access memory, flash memory, read-only memory, programmable read-only memory, or electrically erasable programmable memory, registers, etc. This storage medium is located in the memory 100, and the processor 101 reads the information in the memory 100 and combines its hardware to complete the steps of the method in the foregoing embodiments.

[0081] An embodiment of the present invention also provides a computer-readable storage medium storing computer-executable instructions, which, when called and executed by a processor, cause the processor to implement the control method of the above ice storage air-conditioning system. For specific implementation, reference may be made to the method embodiment, which will not be elaborated herein.

[0082] A computer program product of a control method, device, and electronic device for an ice storage air-conditioning system provided by an embodiment of the present invention includes a computer-readable storage medium storing program code, and the instructions included in the program code can be used to execute the method in the foregoing method embodiment. For specific implementation, reference may be made to the method embodiment, which will not be elaborated herein.

[0083] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the above-described system and / or device can refer to the corresponding processes in the foregoing method embodiment, which will not be elaborated herein.

[0084] In addition, in the description of the embodiments of the present invention, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0085] If the above functions are implemented 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 such an understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art or a part of the technical solution can be embodied in the form of a software product. The computer software product is stored in a storage medium and includes several instructions for causing a computer device (which can be a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present invention. The foregoing storage medium includes: various media such as USB flash drives, mobile hard disks, read-only memories (ROMs), random access memories (RAMs), magnetic disks, or optical discs that can store program code.

[0086] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It 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, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0087] Finally, it should be noted that the above-described embodiments are only specific embodiments of the present invention, which are used to illustrate the technical solutions of the present invention rather than to limit them. The protection scope of the present invention is not limited thereto. Although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that any person skilled in the art within the technical scope disclosed by the present invention can still modify the technical solutions described in the foregoing embodiments or can easily conceive of changes, or make equivalent replacements for 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 all be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention should be determined by the protection scope of the claims.

Claims

1. A control method for an ice storage air-conditioning system, characterized in that, A controller applied to an ice storage air conditioning system, the method comprising: 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; Controlling the ice storage air conditioning system to perform a cooling operation based on the parameters of the ice storage air conditioning system; The cooling mode of the ice storage air conditioning system is switched from the ice storage tank cooling mode to the dual-condition main unit cooling mode; the step of 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 includes: determining the number of operating units of the chiller of the ice storage air conditioning system after the mode switch; turning on the chiller, cooling water pump and cooling water tower with the determined number of operating units; adjusting the opening degree 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.

2. The method according to claim 1, wherein The cooling mode of the ice storage air conditioning system is switched from the dual-condition main unit cooling mode to the ice storage tank cooling mode; The step of 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 includes: Maintaining the working state of the chilled water pump of the ice storage air conditioning system, and adjusting the valve of the ice storage tank and the regulating valve of the plate heat exchanger in the ice storage air conditioning system; wherein, the opening degrees of the valve of the ice storage tank and the regulating valve of the plate heat exchanger are both determined based on the outlet temperature of the plate heat exchanger; Turning off the chiller, cooling water pump and cooling water tower of the ice storage air conditioning system.

3. The method according to claim 1, wherein The step of determining the number of operating units of the chiller of the ice storage air conditioning system after the mode switch includes: Obtaining the load of the ice storage air conditioning system before the mode switch; Based on the load before the switch and a pre-established load prediction model, determining the predicted load of the ice storage air conditioning system after the mode switch; Determining the number of operating units of the chiller of the ice storage air conditioning system after the mode switch based on the predicted load after the mode switch.

4. The method according to claim 3, wherein The step of adjusting the opening degree 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 includes: Obtaining the actual load of the ice storage air conditioning system after the mode switch; If the difference between the outlet water temperature of the chiller and the outlet temperature of the plate heat exchanger is greater than a preset first threshold, or the ratio of the predicted load after the mode switch to the actual load is less than a preset ratio threshold, increasing the opening degree of the valve of the ice storage tank in the ice storage air conditioning system; If the ratio of the predicted load after the mode switch to the actual load is greater than the ratio threshold, decreasing the opening degree of the valve of the ice storage tank in the ice storage air conditioning system; If the absolute value of the difference between the outlet water temperature of the chiller and the outlet temperature of the plate heat exchanger is less than a preset second threshold, closing the valve of the ice storage tank in the ice storage air conditioning system.

5. The method according to claim 4, wherein The step of decreasing 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 through 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 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 a preset compensation temperature.

6. The method according to claim 1, wherein The method further includes: Based on the current power time period and / or the ice amount in the ice storage tank of the ice storage air-conditioning system, switching the cooling mode of the ice storage air-conditioning system.

7. The method according to claim 6, wherein The step of switching the cooling mode of the ice storage air-conditioning system includes: The cooling mode of the ice storage air-conditioning system is switched from the dual-mode chiller cooling mode to the ice storage tank cooling mode; Or, the cooling mode of the ice storage air-conditioning system is switched from the ice storage tank cooling mode to the dual-mode chiller cooling mode.

8. A control device for an ice storage air conditioning system, characterized in that, A controller applied to an ice storage air-conditioning system, the device includes: A cooling parameter determination module, configured 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; A cooling operation execution module, configured to control the ice storage air-conditioning system to execute a cooling operation based on the parameters of the ice storage air-conditioning system; The cooling mode of the ice storage air-conditioning system is switched from the ice storage tank cooling mode to the dual-mode chiller cooling mode; the cooling parameter determination module is configured to determine the number of operating units of the chiller of the ice storage air-conditioning system after the mode switch; start the chillers, cooling water pumps, and cooling water towers of the operating units; adjust the opening degree 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.

9. An electronic device, characterized in that, It includes 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 implement the control method of the ice storage air-conditioning system according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that, 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 the control method of the ice storage air-conditioning system according to any one of claims 1 to 7.

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