Target machine external static pressure control method, device and system and storage medium

Abstract

The invention relates to the technical field of central air conditioning system control, and discloses a target machine external static pressure control method, device and system and a storage medium, which are used for dynamically adjusting target machine external static pressure and reducing energy consumption while ensuring user comfort. The target external static pressure control method comprises the steps that the initial target external static pressure of each air processing unit and the first valve opening degree of each air valve are obtained; according to a first target valve opening ratio of the building area corresponding to the first valve opening of each air valve in each building area; according to the first target valve opening ratio of each building area and at least two preset periodic regulation and control opening ratio intervals, the off-machine static pressure regulation period of each building area is determined; and according to the machine external static pressure adjusting period of each building area and at least two preset static pressure adjusting and controlling opening degree ratio intervals, the initial target machine external static pressure of each air processing unit is updated, and the updated target machine external static pressure of the air processing unit corresponding to each building area is obtained.

Description

Technical Field

[0001] The present invention relates to the technical field of central air-conditioning system control, and particularly to a target external static pressure control method, device, system and storage medium. Background Art

[0002] The central air-conditioning system has functions of temperature and humidity adjustment and air renewal. It usually includes an air handling unit (AHU), air ducts and air valves. The air handling unit is a key unit which includes a fan, refrigeration and / or heating equipment, etc. Through the air handling unit, functions such as refrigeration, heating, ventilation, humidification, dehumidification, air sterilization, air filtration, etc. of the corresponding building area can be realized. The central air-conditioning system can achieve quantitative control of the air volume, temperature and humidity of multiple building areas and multiple rooms through the AHU and air valves, and the air volume is a key parameter to ensure indoor air quality and appropriate temperature and humidity.

[0003] The traditional variable air volume technology is to set the target external static pressure of each building area, and adjust the speed of the fan to ensure that the static pressure in the air duct reaches the set target external static pressure to achieve the purpose of total air volume control, and then control the air volume of each room by adjusting the opening of the air valve in the room. When the set target external static pressure is too large, it will increase the energy consumption of the central air-conditioning system; and when the target external static pressure just meets the air volume requirements of each room, due to the change of the opening and closing state of the room doors in each building area, the pressure of each room in the building area will be unbalanced, and fresh air will more flood into the room with lower pressure, resulting in a decrease in user comfort. Therefore, how to more accurately adjust the target external static pressure of the AHU in each building area is a technical problem to be solved urgently at present. Summary of the Invention

[0004] The present invention provides a target external static pressure control method, device, system and storage medium, which are used to solve the problem that the current central air-conditioning system cannot accurately set the target external static pressure of multiple building areas and it is difficult to achieve a balance between ensuring low energy consumption and user comfort.

[0005] The first aspect of the present invention provides a method for controlling the target external static pressure of an air handling unit, which is applied to a central air conditioning system. The central air conditioning system is connected to the air handling units in each building area, and the central air conditioning system is connected to the air valves in each room. The total air volume of the building area corresponding to each air handling unit is controlled by the target external static pressure of each air handling unit. Each building area includes at least one room. The method for controlling the target external static pressure includes: obtaining the initial target external static pressure of each air handling unit and the first valve opening of each air valve; determining the first target valve opening ratio corresponding to each building area according to the first valve opening of each air valve in each building area and the preset maximum valve opening; determining the external static pressure adjustment period of each building area according to the first target valve opening ratio of each building area and at least two preset period control opening ratio intervals; and updating the initial target external static pressure of each air handling unit according to the external static pressure adjustment period of each building area and at least two preset static pressure control opening ratio intervals to obtain the updated target external static pressure of the air handling unit corresponding to each building area.

[0006] The second aspect of the present invention provides a device for controlling the target external static pressure of an air handling unit, which is applied to a central air conditioning system. The central air conditioning system is connected to the air handling units in each building area, and the central air conditioning system is connected to the air valves in each room. The total air volume of the building area corresponding to each air handling unit is controlled by the target external static pressure of each air handling unit. Each building area includes at least one room. The device for controlling the target external static pressure includes: an obtaining module, configured to obtain the initial target external static pressure of each air handling unit and the first valve opening of each air valve; a processing module, configured to determine the first target valve opening ratio corresponding to each building area according to the first valve opening of each air valve in each building area and the preset maximum valve opening; a determining module, configured to determine the external static pressure adjustment period of each building area according to the first target valve opening ratio of each building area and at least two preset period control opening ratio intervals; and an updating module, configured to update the initial target external static pressure of each air handling unit according to the external static pressure adjustment period of each building area and at least two preset static pressure control opening ratio intervals to obtain the updated target external static pressure of the air handling unit corresponding to each building area.

[0007] The third aspect of the present invention provides a central air conditioning system, including: a memory and at least one processor, wherein instructions are stored in the memory; the at least one processor calls the instructions in the memory so that the central air conditioning system executes the above-mentioned method for controlling the target external static pressure.

[0008] A fourth aspect of the present invention provides a computer-readable storage medium storing instructions that, when run on a computer, cause the computer to execute the above-described target external static pressure control method.

[0009] In the technical solution provided by the present invention, by determining the external static pressure adjustment period of each building area and the most unfavorable room, the target external static pressure is updated, realizing the dynamic adjustment of the target external static pressure in multiple building areas, ensuring the precise control of the air handling unit in each building area of the central air-conditioning system, and ensuring that the air valves in each room are maintained within a suitable valve opening range, achieving a balance between user comfort and low energy consumption. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a schematic diagram of an embodiment of the target external static pressure control method in an embodiment of the present invention;

[0011] Figure 2 It is a schematic diagram of another embodiment of the target external static pressure control method in an embodiment of the present invention;

[0012] Figure 3 It is a schematic diagram of another embodiment of the target external static pressure control method in an embodiment of the present invention;

[0013] Figure 4 It is a schematic diagram of an embodiment of the target external static pressure control device in an embodiment of the present invention;

[0014] Figure 5 It is a schematic diagram of another embodiment of the target external static pressure control device in an embodiment of the present invention;

[0015] Figure 6 It is a schematic diagram of an embodiment of the central air-conditioning system in an embodiment of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0016] The present invention provides a target external static pressure control method, device, system and storage medium for solving the problem that the current central air-conditioning system cannot accurately set the target external static pressure of multiple building areas and it is difficult to achieve a balance between ensuring low energy consumption and user comfort.

[0017] In the description of the present invention, the claims, and the above-mentioned drawings, terms such as "first", "second", "third", "fourth", etc. (if any) are used to distinguish similar objects, and do not necessarily describe a specific order or sequence. It should be understood that the data used in this way can be interchanged under appropriate circumstances, so that the embodiments described here can be implemented in an order other than that illustrated or described here. In addition, the term "comprising" or "having" and any variations thereof are intended to cover non-exclusive inclusion. For example, a process, method, system, product, or device that includes a series of steps or units does not necessarily limit to those steps or units clearly listed, but may include other steps or units not clearly listed or inherent to these processes, methods, products, or devices.

[0018] For ease of understanding, the specific process of the embodiment of the present invention will be described below. Please refer to Figure 1 , an embodiment of the target off-coil static pressure control method in the embodiment of the present invention includes:

[0019] 101. Obtain the initial target off-coil static pressure of each air handling unit and the first valve opening of each air valve.

[0020] It can be understood that the execution subject of the present invention can be a target off-coil static pressure control device, or a central air-conditioning system, a fresh air system, or a server. Specifically, it is not limited here. The embodiment of the present invention takes the central air-conditioning system as the execution subject as an example for illustration.

[0021] The central air-conditioning system in this embodiment is connected to the air handling units in each building area, and the central air-conditioning system is connected to the air valves in each room. The total air volume of the building area corresponding to the air handling unit is controlled by the target off-coil static pressure of each air handling unit. For each set target off-coil static pressure, the greater the total air volume output by the air handling unit, and each building area includes at least one room.

[0022] In this embodiment, the target off-coil static pressure is used to control the total output of the air handling unit. For example, when the air handling unit is a fan, the target off-coil static pressure determines the rotational speed of the fan to achieve control of the total air volume output by the fan. The initial target off-coil static pressure of each air handling unit is used to indicate the initial target off-coil static pressure of each air handling unit when the central air-conditioning system initialization is completed.

[0023] In this embodiment, the valve opening is used to control the output of the air valve. The greater the valve opening, the more air the air valve allows to pass through, and the air volume of the room increases. The first valve opening is used to indicate the valve opening value of the air valve in each room when the central air-conditioning system initialization is completed.

[0024] 102. Determine the first target valve opening ratio corresponding to each building area according to the first valve opening of each air valve in each building area and the preset maximum valve opening.

[0025] In this embodiment, the ratio between the first opening of the air valve in each room and the maximum valve opening is the first valve opening ratio. The first valve opening ratio is used to indicate the relative opening size of each air valve at that time. For example, if the first valve opening ratio is 0 (or 0%), the air valve here is in the closed state; when the first valve opening ratio is 1 (or 100%), the air valve is in the fully open state. At this time, the room air volume completely depends on the total air volume output by the air handling unit in each building area and the pressure difference between the most unfavorable regulated room and other rooms. The user can no longer increase the room air volume by increasing the air valve.

[0026] Perform a difference operation on the first valve opening of each air valve in each building area and the preset maximum valve opening to obtain the first valve opening ratio of each air valve; sort the first valve opening ratios of all air valves in each building area according to their magnitudes to obtain the first valve opening ratio sequence, and determine the first target valve opening ratio corresponding to each building area according to the first valve opening ratio sequence of each building area.

[0027] It can be understood that to avoid different valve opening representations for multiple air valves in each building due to air valve maintenance and replacement, procurement batches, and air valve model differences, this embodiment normalizes the working parameters of all air valves through the valve opening ratio, converting data with different dimensions or different ranges into a unified scale or range to enable comparison of all air valves.

[0028] In this embodiment, the most unfavorable regulated room can be the room with the largest first valve opening ratio in each building area. For easy distinction, this room is called the target maximum opening ratio room. The most unfavorable regulated room can also be the room with the smallest first valve opening ratio in each building area. For easy distinction, this room is called the target minimum opening ratio room. The most unfavorable regulated room can also be a combination of the target maximum opening ratio room and the target minimum opening ratio room.

[0029] In this embodiment, the most unfavorable regulated room in each building area is used as the reference adjustment object, and dynamic adjustment is performed through the first target valve opening ratio of each building area to meet the adjustment requirements of all rooms in each building area and improve user comfort.

[0030] In a feasible implementation manner, if the set most unfavorable regulation room is the room with the target maximum opening ratio, determining the first target valve opening ratio corresponding to each building area according to the first valve opening ratio sequence of each building area includes: determining the maximum value of the first valve opening ratios in the first valve opening ratio sequence as the first target valve opening ratio corresponding to the corresponding building area.

[0031] In a feasible implementation manner, if the set most unfavorable regulation room is the room with the target minimum opening ratio, determining the first target valve opening ratio corresponding to each building area according to the first valve opening ratio sequence of each building area includes: determining the minimum value of the first valve opening ratios in the first valve opening ratio sequence as the first target valve opening ratio corresponding to the corresponding building area, and the minimum value of the first valve opening ratios is not zero.

[0032] In a feasible implementation manner, if the set most unfavorable regulation room includes the room with the target maximum opening ratio and the room with the target minimum opening ratio, determining the first target valve opening ratio corresponding to each building area according to the first valve opening ratio sequence of each building area includes: the first target valve opening ratio corresponding to each building area includes the first valve opening ratio corresponding to the room with the target maximum opening ratio (for easy distinction, called the first maximum valve opening ratio) and the first valve opening ratio corresponding to the room with the target minimum opening ratio (for easy distinction, called the first minimum valve opening ratio).

[0033] Alternatively, select a valve opening ratio with the most unfavorable regulation from the first maximum valve opening ratio and the first minimum valve opening ratio as the first target valve opening ratio according to the degree of the most unfavorable regulation, where the degree of the most unfavorable regulation is the degree to which the valve opening ratio approaches the extreme value of the opening ratio.

[0034] In a feasible implementation, when the maximum value of the first valve opening ratio of any building area is greater than or equal to the preset opening ratio threshold, the maximum value of the first valve opening ratio is determined as the first target valve opening ratio of the corresponding building area; when the maximum value of the first valve opening ratio of any building area is less than the preset opening ratio threshold, the first valve opening ratio corresponding to the room with the target minimum opening ratio is determined as the first target valve opening ratio of the corresponding building area; in this embodiment, when there are both a room with the target maximum opening ratio and a room with the target minimum opening ratio, the first valve opening ratio corresponding to the room with the target maximum opening ratio is preferentially determined as the first target valve opening ratio of the corresponding building area. Only when the first valve opening of the room with the target maximum opening ratio is within an appropriate range (i.e., the maximum value of the first valve opening ratio is less than the preset opening ratio threshold), the room with the target minimum opening ratio is determined as the most unfavorable regulation room. In this embodiment, regardless of whether the degree of the most unfavorable regulation is the same or different, the priority of the room with the target maximum opening ratio is set to be higher than that of the room with the target minimum opening ratio. Since both the room with the target maximum opening ratio and the room with the target minimum opening ratio play a role in reducing the energy consumption of the central system, preferentially taking the room with the target maximum opening ratio as the adjustment reference object can avoid the temperature imbalance in this room.

[0035] It should be further noted that the first maximum valve opening ratio may include 100%, that is, the air valve is in the fully open state, while the first minimum valve opening ratio does not include 0%, that is, the air valve is in the closed state. In this case, this room is not considered, and the room with the second smallest first target valve opening ratio is selected as the room with the target minimum opening ratio and used as the reference adjustment object.

[0036] 103. Determine the external static pressure adjustment period of each building area according to the first target valve opening ratio of each building area and at least two preset cycle control opening ratio intervals.

[0037] In this embodiment, the cycle control opening ratio interval refers to the opening ratio interval set for cycle control. If the first target valve opening ratio is within a certain cycle control opening ratio interval, the cycle corresponding to this cycle control opening ratio interval, that is, the external static pressure adjustment period of the building area.

[0038] In this embodiment, the external static pressure adjustment period refers to the cycle for updating the target external static pressure of a specified building area. At the end of the external static pressure adjustment period of a certain building area, the target external static pressure of this building area is updated to achieve the dynamic adjustment of the total air volume of each building area.

[0039] It can be understood that the external static pressure adjustment period of this embodiment can be dynamically changed. When determining the first adjustment period according to the initial state of the central air-conditioning system (i.e., the state corresponding to the first valve opening), start the timer. If within the first adjustment period, the first target valve opening ratio of the corresponding building area changes to other periodic regulation opening ratio intervals, then determine the second adjustment period. At the end of the first adjustment period, start the second adjustment period timing, and cycle in turn to achieve dynamic periodic adjustment;

[0040] Alternatively, the external static pressure adjustment period can also be fixed. After determining the first adjustment period for each building area according to the initial state, no further period update is performed, and the target external static pressure is updated for each building area according to the first adjustment period in a cycle.

[0041] It should be further noted that if the first target valve opening ratio includes the first maximum valve opening ratio and the first minimum valve opening ratio, that is, the set most unfavorable adjustment room includes the target maximum opening ratio room and the target minimum opening ratio room, then determine the first target period according to the first maximum valve opening ratio of each building area, determine the second target period according to the first minimum valve opening ratio of each building area, and select the shorter period between the first target period and the second target period as the external static pressure adjustment period corresponding to the building area.

[0042] For easy understanding, an example is provided:

[0043] The first maximum valve opening ratio MaxOP of building area A A1 = 98%, the first minimum valve opening ratio MinOP A1 = 80%, the external static pressure adjustment period is expressed as CYCLE, and the central air-conditioning system is provided with three periodic regulation opening ratio intervals:

[0044] The first periodic regulation opening ratio interval: MaxOP or MinOP ∈ (10%, 90%), then CYCLE = T1;

[0045] The second periodic regulation opening ratio interval: MaxOP or MinOP ∈ [90%, 95%), or, MaxOP or MinOP ∈ (5%, 10%], then CYCLE = T2;

[0046] The third periodic regulation opening ratio interval: MaxOP or MinOP ∈ [95%, 100%), or, MaxOP or MinOP ∈ (0%, 5%], then CYCLE = T3, T1 > T2 > T3.

[0047] According to the above content, the first target period corresponding to the room with the maximum opening ratio target in Area A of the building is T3, and the second target period corresponding to the room with the minimum opening ratio target is T1. Since the adverse regulation degree of the room with the maximum opening ratio target is greater than that of the room with the minimum opening ratio target, T3 is selected as the external static pressure regulation period of Area A of the building.

[0048] It can be understood that the more the number of set opening ratio intervals for periodic regulation, the more precise the regulation. The number of opening ratio intervals for periodic regulation can be two or more, and this embodiment does not make specific limitations.

[0049] 104. Update the initial target external static pressure of each air handling unit according to the external static pressure regulation period of each building area and at least two preset static pressure regulation opening ratio intervals, so as to obtain the updated target external static pressure of the air handling unit corresponding to each building area.

[0050] In this embodiment, the static pressure regulation opening ratio interval refers to the opening ratio interval set for static pressure regulation. The more the number of static pressure regulation opening ratio intervals, the more precise the regulation. The number of static pressure regulation opening ratio intervals can be two or more, and this embodiment does not make specific limitations.

[0051] When the central air conditioning system determines the external static pressure regulation period of each building area, start the timer. When the timing of the external static pressure regulation period of any building area ends, compare the target valve opening ratio of this building area with at least two preset static pressure regulation opening ratio intervals. If the target valve opening ratio is within a certain static pressure regulation opening ratio interval, update the target external static pressure of the air handling unit of this building area according to the static pressure determination method corresponding to this static pressure regulation opening ratio interval.

[0052] It should be further noted that the above target valve opening ratio can be the first target valve opening ratio, or the second target valve opening ratio of this building area re-determined according to the current valve opening ratio situation of this building area at the end of the external static pressure regulation period. Among them, the calculation amount required for updating the target external static pressure through the first target valve opening ratio is less, while updating the target external static pressure through the second target valve opening ratio can adapt to the change in the total air volume demand during the external static pressure regulation period, with higher flexibility.

[0053] For ease of understanding, take the set most unfavorable regulation room as the room with the minimum opening ratio target, and the target valve opening ratio as the first minimum valve opening ratio as an example for description.

[0054] The first minimum valve opening ratio MinOP of Area B of the building B1 = 6%, and the initial target external static pressure is ΔPB1 , the central air conditioning system is set with three static pressure regulation opening ratio intervals:

[0055] The first static pressure regulation opening ratio interval: MinOP ∈ (0%, 10%), then ΔP (N,CYCLE_T) = ΔP (N,CYCLE_T-1) - P1;

[0056] The second static pressure regulation opening ratio interval: MinOP ∈ [10%, 30%), then ΔP (N,CYCLE_T) = ΔP (N,CYCLE_T-1) ;

[0057] The third static pressure regulation opening ratio interval: MinOP ∈ [30%, 100%), then ΔP (N,CYCLE_T) = ΔP (N,CYCLE_T-1) + P2;

[0058] Above, T is the current external static pressure adjustment period, T - 1 is the previous external static pressure adjustment period, and the air handling unit N represents the air handling unit of the Nth building area, and ΔP (N,CYCLE_T) represents the target external static pressure of the air handling unit of the Nth building area in the Tth external static pressure adjustment period. P1 and P2 are set pressure values, and P1 and P2 can be equal or unequal, and their values can be set according to the actual situation.

[0059] It can be understood that when the minimum valve opening ratio of a building area is less than 10%, the demand for the total air volume in this building area is not high. By reducing the target external static pressure of this building area, the total air volume output from this building area is reduced, greatly reducing the energy consumption of the air handling unit in this building area. And when the valve opening of the air valve is below 10% (or above 90%), the space for the air valve to adjust the room air volume in this room is small. If the pressure in this room changes, the air volume cannot be adjusted in real time through the air valve, which will reduce the comfort of users in the room. Dynamically adjusting the target external static pressure for each building area can maintain the valve opening of the air valve in each room in each building area within a suitable valve opening range, leaving a larger adjustment space for the air valve in each room and ensuring the comfort of users in each room.

[0060] It can be understood that the valve openings of the room with the target maximum opening ratio and the room with the target minimum opening ratio in a building area usually do not differ much. Therefore, the static pressure adjustment requirements for the static pressure regulation opening ratio intervals corresponding to the room with the target maximum opening ratio and the room with the target minimum opening ratio in a building area are usually the same. Usually, only the room with the most unfavorable adjustment degree needs to be selected as the adjustment reference object for the most unfavorable adjustment to perform regional static pressure regulation.

[0061] It should be further noted that the above examples are all possible implementation manners. The actual set values, the range values of each opening ratio interval, and the methods for determining the target external static pressure of the machine and the external static pressure adjustment period within each range value can also be other numerical values, range values, and methods. For example, the target external static pressure of each opening ratio interval can also be adjusted in the form of a proportional coefficient ΔP (N,CYCLE_T) = α * ΔP (N,CYCLE_T-1) , and no specific limitations are imposed in this embodiment.

[0062] In the embodiment of the present invention, by determining the external static pressure adjustment period of each building area and updating the target external static pressure of the most unfavorable room, the dynamic adjustment of the target external static pressure of multiple building areas is realized, ensuring the precise control of the air handling unit of each building area in the central air-conditioning system, so that there is enough adjustment space for the air valves of each room, and a balance is achieved between user comfort and low energy consumption.

[0063] Please refer to Figure 2 , another embodiment of the target external static pressure control method in the embodiment of the present invention includes:

[0064] 201. Obtain the initial target external static pressure of each air handling unit and the first valve opening of each air valve.

[0065] 202. Determine the first target valve opening ratio corresponding to each building area according to the first valve opening of each air valve in each building area and the preset maximum valve opening.

[0066] In a feasible implementation manner, if the set most unfavorable adjustment room includes the target maximum opening ratio room and the target minimum opening ratio room, then the rooms with the air valve in the open state in each building area are determined as candidate rooms, and at least two candidate rooms in each building area are obtained; the difference operation is performed between the first valve opening of the air valve corresponding to each candidate room and the preset maximum valve opening to obtain the first valve opening ratio of each candidate room; the maximum value and the minimum value of the first valve opening ratio in each building area are determined according to the first valve opening ratio of each candidate room in each building area; the first target valve opening ratio of the building area is generated according to the maximum value and the minimum value of the first valve opening ratio.

[0067] It can be understood that the screening of the above candidate rooms has filtered out the rooms with the valve opening of 0 (or 0%), that is, the rooms with the air valve in the closed state, so as to improve the calculation efficiency.

[0068] The method for generating the first target valve opening ratio of the building area according to the maximum value and the minimum value of the first valve opening ratio can be performed with reference to step 102, and will not be elaborated here.

[0069] In a feasible implementation manner, if the set most unfavorable regulation room is the room with the target maximum opening ratio, then the rooms with the damper status being open in each building area are determined as candidate rooms, and at least one candidate room in each building area is obtained; the difference operation is performed between the first valve opening of the damper corresponding to each candidate room and the preset maximum valve opening to obtain the first valve opening ratio of each candidate room; the maximum value of the first valve opening ratios of the candidate rooms in each building area is determined according to the first valve opening ratios of each candidate room in each building area; and the maximum value of the first valve opening ratios is determined as the first target valve opening ratio of the building area.

[0070] It can be understood that in this embodiment, if the set most unfavorable regulation room is the room with the target minimum opening ratio, the method for setting the room with the target maximum opening ratio can be referred to for execution, and the minimum value of the first valve opening ratios in the candidate rooms is screened, which will not be elaborated here.

[0071] 203. Determine the external static pressure regulation period of each building area according to the first target valve opening ratio of each building area and the preset at least two cycle regulation opening ratio intervals.

[0072] When the first target valve opening ratio of any one building area is within the range of the preset first cycle regulation opening ratio interval, the first regulation period is determined as the external static pressure regulation period of the building area; when the first target valve opening ratio of any one building area is within the range of the preset second cycle regulation opening ratio interval, the second regulation period is determined as the external static pressure regulation period of the building area, and the second regulation period is less than the first regulation period; traverse the first target valve opening ratios of each building area in turn to obtain the external static pressure regulation period of each building area.

[0073] Optionally, the second regulation period is one-half of the first regulation period. For example, if the first regulation period is 1 hour, the second regulation period is 0.5 hour.

[0074] It can be understood that this embodiment only provides an example of setting two cycle regulation opening ratio intervals, and the cycle regulation opening ratio intervals in this embodiment can also be three or more, which are not specifically limited.

[0075] 204. When the timing of the external static pressure regulation period of any one building area ends, update the initial target external static pressure of the air handling unit corresponding to the building area according to the first target valve opening ratio of the building area and the preset at least two static pressure regulation opening ratio intervals, and obtain the updated target external static pressure of the air handling unit corresponding to the target building area.

[0076] In a feasible implementation, when the timing of the static pressure regulation cycle outside the unit in any building area ends, if the first target valve opening ratio of the building area is within the preset first static pressure regulation opening ratio range, the initial target static pressure outside the unit of the air handling unit corresponding to the building area is reduced to obtain the updated target static pressure outside the unit of the air handling unit corresponding to the building area; if the first target valve opening ratio of the building area is within the preset second static pressure regulation opening ratio range, the initial target static pressure outside the unit of the air handling unit corresponding to the building area is determined as the updated target static pressure outside the unit of the air handling unit corresponding to the building area; if the first target valve opening ratio of the building area is within the preset third static pressure regulation opening ratio range, the initial target static pressure outside the unit of the air handling unit corresponding to the building area is increased to obtain the updated target static pressure outside the unit of the air handling unit corresponding to the building area.

[0077] For example, taking the most unfavorable regulated room as the room with the target maximum opening ratio as an example, the central air conditioning system includes an AHU [1，n] , that is, it includes n AHUs, each AHU corresponding to a building area. The central air conditioning system can adjust the air volume of n building areas. i ∈ [1, n], and the target static pressure outside the unit ΔP i of the AHU i corresponding to the building area i has a static pressure regulation cycle of CYCLE i . When the timing of CYCLE i ends, the target static pressure outside the unit of the AHU i corresponding to the building area i is updated according to the following rules:

[0078] ① If the MaxOP i of the building area i where the AHU i is located ∈ (0%, 70%), then output ΔP i = the previous moment's ΔP i - 10 Pa;

[0079] ② If the MaxOP i of the building area i where the AHU i is located ∈ [70%, 90%], then output ΔP i = the previous moment's ΔP i ;

[0080] ③ If the MaxOP i of the building area i where the AHU i is located ∈ (90%, 100], then output ΔP i = the previous moment's ΔP i + P2;

[0081] The above P1 and P2 are the increase and decrease ranges of the set target external static pressure of the machine, and their values can be equal or unequal. For example, set P1 = P2 = 10 Pa, or set P1 = 5 Pa, P2 = 8 Pa. The specific values of the increase and decrease ranges of the target external static pressure of the machine can be set according to the actual situation, and this embodiment does not make specific limitations.

[0082] It can be understood that the static pressure regulation opening ratio interval of this embodiment can also be two or more, and the range values of the static pressure regulation opening ratio interval can also be set according to the actual situation.

[0083] It should be further noted that if the set most unfavorable regulation room can also be the target minimum opening ratio room, if the set most unfavorable regulation room includes the target maximum opening ratio room and the target minimum opening ratio room, then one room is selected as the adjustment reference object according to the degree of unfavorable, and this embodiment does not make limitations.

[0084] 205. Traverse the external static pressure adjustment cycle of each building area to obtain the updated target external static pressure of the air handling unit corresponding to each building area.

[0085] The central air conditioning system updates the target external static pressure of the air handling unit corresponding to each building area according to the external static pressure adjustment cycle of each building area in accordance with the above step 204.

[0086] In the embodiment of the present invention, by determining the external static pressure adjustment cycle and the most unfavorable room of each building area to update the target external static pressure, and based on the first target valve opening ratio of each building area, the target external static pressure of each building area is adjusted, realizing the dynamic adjustment of the target external static pressure of multiple building areas, ensuring the precise control of the air handling unit of the central air conditioning system for each building area, enabling sufficient adjustment space for the air valves of each room, and achieving a balance between user comfort and low energy consumption.

[0087] Please refer to Figure 3 , another embodiment of the target external static pressure control method in the embodiment of the present invention includes:

[0088] 301. Obtain the initial target external static pressure of each air handling unit and the first valve opening of each air valve.

[0089] 302. Determine the first target valve opening ratio corresponding to each building area according to the first valve opening of each air valve in each building area and the preset maximum valve opening.

[0090] 303. Determine the external static pressure adjustment cycle of each building area according to the first target valve opening ratio of each building area and at least two preset cycle regulation opening ratio intervals.

[0091] Steps 301-303 can be executed with reference to steps 101-103, which will not be elaborated here.

[0092] 304. Adjust the first valve opening degree of each air valve according to the air valve adjustment period of each room and the carbon dioxide concentration of each room to obtain the second valve opening degree of each air valve.

[0093] The central air-conditioning system of this embodiment is also respectively connected to the carbon dioxide sensors of each room, and the carbon dioxide concentration of each room is collected through the carbon dioxide sensors to adjust the valve opening degree of the air valves in each room, and the air volume of the room corresponding to the air valve is controlled through the air valves of each room.

[0094] Specifically, when the timing of the air valve adjustment period of each room in the central air-conditioning system ends, the first valve opening degree of each air valve is adjusted according to the carbon dioxide concentration overshoot of each room and at least two preset opening degree control gas concentration overshoot intervals to obtain the second valve opening degree of each air valve.

[0095] Among them, the carbon dioxide overshoot refers to the difference between the real-time value of carbon dioxide in each room and the set value of carbon dioxide concentration, that is, the amount exceeding the set value of carbon dioxide concentration.

[0096] In this embodiment, the opening degree control gas concentration overshoot interval refers to the opening degree ratio interval set for air valve opening degree control. The more the number of opening degree control gas concentration overshoot intervals, the more precise the control. The number of opening degree control gas concentration overshoot intervals can be two or more, and this embodiment does not make specific limitations.

[0097] The air valve adjustment period of each room in this embodiment refers to the period when the air valve automatically adjusts its opening degree. This period can be a set fixed value or a dynamic period calculated according to the carbon dioxide overshoot of each room.

[0098] Optionally, the air valve adjustment period of each room is determined according to the carbon dioxide overshoot of each room and at least two preset period control gas concentration overshoot intervals.

[0099] Among them, the period control gas concentration overshoot interval refers to the gas concentration overshoot interval set for period control. If the carbon dioxide concentration overshoot of a certain room is within a certain period control gas concentration overshoot interval, the period corresponding to this period control gas concentration overshoot interval, that is, the air valve opening degree adjustment period of this room. The more the number of period control gas concentration overshoot intervals, the more precise the control. The number of period control gas concentration overshoot intervals can be two or more, and this embodiment does not make specific limitations.

[0100] It can be understood that the air damper adjustment period can be set to a "short period", and the external static pressure adjustment period can be set to a "long period", that is, the air damper adjustment period is shorter than the external static pressure adjustment period. For example, the air damper adjustment period is set to 1 hour / time, and the external static pressure adjustment period is set to 3 hours / time to more quickly respond to the real-time adjustment needs of users in the room. Through the cross-adjustment of the two periods, the dynamic control of the total air volume in the building area and the air volume in the room is achieved. The shorter the set period, the higher the frequency of calculating the valve opening and the target external static pressure, the greater the required calculation amount, and the more accurate the control. However, if the period is too short, it will increase unnecessary energy consumption and cause frequent changes in the air volume in the building area and the room. Within an appropriate range, the specific values of the air damper adjustment period and the external static pressure adjustment period are not limited in this embodiment.

[0101] 305. When the timing of the external static pressure adjustment period of any building area ends, determine the current second target valve opening ratio of the target building area, where the target building area is the building area where the timing of the external static pressure adjustment period ends.

[0102] When the timing of the external static pressure adjustment period of any building area ends, according to the current second target valve opening ratio of this building area, the target building area is the building area where the timing of the external static pressure adjustment period ends.

[0103] Optionally, if the set most unfavorable adjustment room is the target minimum opening ratio room, then determine the rooms with the air damper in the open state in the target building area as candidate rooms to obtain at least one candidate room for each building area; perform a difference operation on the second valve opening of the air damper corresponding to each candidate room and the preset maximum valve opening to obtain the second valve opening ratio of each candidate room; determine the minimum value of the second valve opening ratio of the target building area according to the second valve opening ratio of each candidate room in the target building area; determine the maximum value of the second valve opening ratio as the second target valve opening ratio of the target building area.

[0104] It can be understood that the method for determining the second target valve opening ratio can be performed with reference to step 202. The second target valve opening ratio is used to indicate the maximum value and / or minimum value of the current valve opening ratio of the target building area. It can be determined according to the second valve opening automatically adjusted by each air damper in the target building area, or it can be determined according to the third valve opening manually adjusted by the users in the rooms of the target building area. This embodiment does not make specific limitations.

[0105] 306. Update the initial target external static pressure of the air handling unit corresponding to the target building area according to the current second target valve opening ratio of the target building area and at least two preset static pressure control opening ratio intervals to obtain the updated target external static pressure of the air handling unit corresponding to the target building area.

[0106] If the current second target valve opening ratio of the target building area is within the preset first static pressure regulation opening ratio range, then perform a difference operation on the initial target external static pressure of the air handling unit corresponding to the target building area and the preset first pressure to obtain the updated target external static pressure of the air handling unit corresponding to the target building area; if the current second target valve opening ratio of the target building area is within the preset second static pressure regulation opening ratio range, then determine the initial target external static pressure of the air handling unit corresponding to the target building area as the updated target external static pressure of the air handling unit corresponding to the target building area; if the current second target valve opening ratio of the target building area is within the preset third static pressure regulation opening ratio range, then perform an addition operation on the initial target external static pressure of the air handling unit corresponding to the target building area and the preset second pressure to obtain the updated target external static pressure of the air handling unit corresponding to the target building area.

[0107] In a feasible implementation manner, after determining the current second target valve opening ratio of the target building area, it further includes: updating the external static pressure adjustment period of the target building area according to the current second target valve opening ratio of the target building area and the preset at least two cycle regulation opening ratio ranges.

[0108] 307. Traverse the external static pressure adjustment periods of each building area to obtain the updated target external static pressure of the air handling unit corresponding to each building area.

[0109] Step 303 can be executed with reference to step 205 and will not be elaborated here.

[0110] In the embodiment of the present invention, by determining the external static pressure adjustment period of each building area and the most unfavorable room to update the target external static pressure, dynamic cycle control of the total air volume of each building area is realized. Based on the air valve adjustment period of each room and the carbon dioxide concentration of each room, the valve opening of each air valve is adjusted to realize dynamic air volume control of each room. And further adjust the external static pressure adjustment period and the target external static pressure according to the updated second valve opening, which improves the precise control of the air volume of each building area and each room in the central air-conditioning system, enables sufficient adjustment space for the air valves of each room, and achieves a balance between user comfort and low energy consumption.

[0111] The target external static pressure control method in the embodiments of the present invention has been described above. Next, the target external static pressure control device in the embodiments of the present invention will be described. The target external static pressure control device is applied to a central air-conditioning system. The central air-conditioning system is connected to the air handling units in each building area and the air valves in each room. The total air volume of the building area corresponding to the air handling unit is controlled by the target external static pressure of each air handling unit. Each building area includes at least one room. Please refer to Figure 4 , one embodiment of the target external static pressure control device in the embodiments of the present invention includes:

[0112] An acquisition module 401, configured to acquire the initial target external static pressure of each air handling unit and the first valve opening degree of each air valve;

[0113] A processing module 402, configured to determine the first target valve opening degree ratio corresponding to each building area according to the first valve opening degree of each air valve in each building area and the preset maximum valve opening degree;

[0114] A determination module 403, configured to determine the external static pressure adjustment period of each building area according to the first target valve opening degree ratio of each building area and at least two preset cycle control opening degree ratio intervals;

[0115] An update module 404, configured to update the initial target external static pressure of each air handling unit according to the external static pressure adjustment period of each building area and at least two preset static pressure control opening degree ratio intervals, so as to obtain the updated target external static pressure of the air handling unit corresponding to each building area.

[0116] In the embodiments of the present invention, by determining the external static pressure adjustment period of each building area and the most unfavorable room to update the target external static pressure, the dynamic adjustment of the target external static pressure in multiple building areas is realized, the precise control of the air handling unit in each building area by the central air-conditioning system is ensured, and the air valves in each room are maintained within a suitable valve opening degree range, achieving a balance between user comfort and low energy consumption.

[0117] Please refer to Figure 5 , another embodiment of the target external static pressure control device in the embodiments of the present invention includes:

[0118] An acquisition module 401, configured to acquire the initial target external static pressure of each air handling unit and the first valve opening degree of each air valve;

[0119] A processing module 402, configured to determine the first target valve opening degree ratio corresponding to each building area according to the first valve opening degree of each air valve in each building area and the preset maximum valve opening degree;

[0120] A determination module 403, configured to determine the external static pressure regulation period of each building area according to the first target valve opening ratio of each building area and at least two preset cycle regulation opening ratio intervals;

[0121] An update module 404, configured to update the initial target external static pressure of each air handling unit according to the external static pressure regulation period of each building area and at least two preset static pressure regulation opening ratio intervals, so as to obtain the updated target external static pressure of the air handling unit corresponding to each building area. Optionally, the B module 302 is specifically configured to:

[0122] Optionally, the determination module 403 is specifically configured to:

[0123] When the first target valve opening ratio of any building area is within the range of the preset first cycle regulation opening ratio interval, determine the first regulation period as the external static pressure regulation period of the building area;

[0124] When the first target valve opening ratio of any building area is within the range of the preset second cycle regulation opening ratio interval, determine the second regulation period as the external static pressure regulation period of the building area, and the second regulation period is less than the first regulation period;

[0125] Traverse the first target valve opening ratio of each building area in turn to obtain the external static pressure regulation period of each building area.

[0126] Optionally, the update module 404 includes:

[0127] A first update sub-module 4041, configured to, when the timing of the external static pressure regulation period of any building area ends, update the initial target external static pressure of the air handling unit corresponding to the building area according to the first target valve opening ratio of the building area and at least two preset static pressure regulation opening ratio intervals, so as to obtain the updated target external static pressure of the air handling unit corresponding to the target building area;

[0128] A first traversal sub-module 4042, configured to traverse the external static pressure regulation period of each building area to obtain the updated target external static pressure of the air handling unit corresponding to each building area.

[0129] Optionally, the first update sub-module 4041 is specifically configured to:

[0130] If the first target valve opening ratio of the building area is within the range of the preset first static pressure regulation opening ratio interval, then reduce the initial target external static pressure of the air handling unit corresponding to the building area to obtain the updated target external static pressure of the air handling unit corresponding to the building area;

[0131] If the first target valve opening ratio of a building area is within the preset second static pressure regulation opening ratio range, the initial target external static pressure of the air handling unit corresponding to the building area is determined as the updated target external static pressure of the air handling unit corresponding to the building area;

[0132] If the first target valve opening ratio of a building area is within the preset third static pressure regulation opening ratio range, the initial target external static pressure of the air handling unit corresponding to the building area is added to the preset second pressure for summation operation to obtain the updated target external static pressure of the air handling unit corresponding to the building area.

[0133] Optionally, the target external static pressure control device further includes: a damper adjustment module 405, configured to adjust the first valve opening of each damper according to the damper adjustment cycle of each room and the carbon dioxide concentration of each room to obtain the second valve opening of each damper.

[0134] Optionally, the processing module 402 is specifically configured to: determine the rooms with the damper status of open in each building area as candidate rooms, and obtain at least one candidate room in each building area;

[0135] Perform a difference operation between the first valve opening of the damper corresponding to each candidate room and the preset maximum valve opening to obtain the first valve opening ratio of each candidate room;

[0136] Determine the maximum value of the first valve opening ratio of the building area according to the first valve opening ratio of each candidate room in each building area;

[0137] Determine the maximum value of the first valve opening ratio as the first target valve opening ratio of the building area.

[0138] Optionally, the update module 404 further includes:

[0139] A determination sub-module 4043, when the timing of the external static pressure adjustment cycle of any building area ends, determines the current second target valve opening ratio of the target building area, where the target building area is the building area where the timing of the external static pressure adjustment cycle ends;

[0140] A second update sub-module 4044, updates the initial target external static pressure of the air handling unit corresponding to the target building area according to the current second target valve opening ratio of the target building area and at least two preset static pressure regulation opening ratio ranges to obtain the updated target external static pressure of the air handling unit corresponding to the target building area;

[0141] A second traversal sub-module 4045, traverses the external static pressure adjustment cycles of each building area to obtain the updated target external static pressure of the air handling unit corresponding to each building area.

[0142] In the embodiments of the present invention, by determining the outside static pressure adjustment period of each building area and updating the target outside static pressure for the most unfavorable room, the dynamic periodic control of the total air volume of each building area is achieved. Based on the damper adjustment period of each room and the carbon dioxide concentration of each room, the opening degree of each damper is adjusted, realizing the dynamic air volume control of each room. Further, according to the updated second opening degree, the outside static pressure adjustment period and the target outside static pressure are adjusted, improving the precise control of the air volume of each building area and each room in the central air-conditioning system, enabling sufficient adjustment space for the dampers of each room and achieving a balance between user comfort and low energy consumption.

[0143] Above Figure 4 and Figure 5 The target outside static pressure control device in the embodiments of the present invention is described in detail from the perspective of modular functional entities. Below, the central air-conditioning system in the embodiments of the present invention is described in detail from the perspective of hardware processing.

[0144] Refer to Figure 6 As shown, the central air-conditioning system includes a processor 600 and a memory 601. The memory 601 stores machine-executable instructions that can be executed by the processor 600, and the processor 600 executes the machine-executable instructions to implement the above-mentioned target outside static pressure control method.

[0145] Furthermore, Figure 6 The shown central air-conditioning system further includes a bus 602 and a communication interface 603. The processor 600, the communication interface 603, and the memory 601 are connected through the bus 602.

[0146] Among them, the memory 601 may include a high-speed random access memory (Random Access Memory, RAM), and may also include non-volatile memory, for example, at least one disk memory. Through at least one communication interface 603 (which can be wired or wireless), the communication connection between this system network element and at least one other network element is realized, and the Internet, wide area network, local area network, metropolitan area network, etc. can be used. The bus 602 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 representation, Figure 6 only a bidirectional arrow is used in

[0147] The processor 600 may be an integrated circuit chip with the ability to process signals. In the implementation process, the steps of the above method can be completed by the integrated logic circuit of the hardware in the processor 600 or the instructions in the form of software. The above-mentioned processor 600 may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field-programmable gate array (FPGA) 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 disclosure. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc. The steps of the method disclosed in combination with the embodiments of the present disclosure can be directly embodied as being executed and completed by a hardware decoding processor, or executed and completed by a combination of the hardware and software modules in the decoding processor. The software module may be located in a mature storage medium in the art such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory, or an electrically erasable programmable memory, a register, etc. This storage medium is located in the memory 601, and the processor 600 reads the information in the memory 601 and combines its hardware to complete the method steps of the foregoing embodiments.

[0148] The present invention also provides a computer-readable storage medium. The computer-readable storage medium may be a non-volatile computer-readable storage medium, or the computer-readable storage medium may also be a volatile computer-readable storage medium. Instructions are stored in the computer-readable storage medium. When the instructions are run on a computer, the computer is caused to execute the steps of the target external static pressure control method. The steps specifically include:

[0149] Obtain the initial target external static pressure of each air handling unit and the first valve opening of each air valve; determine the first target valve opening ratio corresponding to each building area according to the first valve opening of each air valve in each building area and the preset maximum valve opening; determine the external static pressure adjustment period of each building area according to the first target valve opening ratio of each building area and at least two preset period control opening ratio intervals; update the initial target external static pressure of each air handling unit according to the external static pressure adjustment period of each building area and at least two preset static pressure control opening ratio intervals to obtain the updated target external static pressure of the air handling unit corresponding to each building area. This embodiment realizes the dynamic periodic control of the total air volume of each building area, reduces the additional energy consumption of the central air-conditioning system, and improves the comfort of users.

[0150] The above determination of the external static pressure adjustment period of each building area according to the first target valve opening ratio of each building area and at least two preset period control opening ratio intervals includes: when the first target valve opening ratio of any building area is within the range of the preset first period control opening ratio interval, determine the first adjustment period as the external static pressure adjustment period of the building area; when the first target valve opening ratio of any building area is within the range of the preset second period control opening ratio interval, determine the second adjustment period as the external static pressure adjustment period of the building area, and the second adjustment period is less than the first adjustment period; sequentially traverse the first target valve opening ratio of each building area to obtain the external static pressure adjustment period of each building area. In this embodiment, different adjustment periods are divided according to the first target valve opening ratio of each building area. The closer the first target valve opening ratio is to the extreme value, the shorter the adjustment period, so that the central air-conditioning system can respond to the air volume adjustment requirements of the building area more timely and accurately.

[0151] Updating the initial target external static pressure of each air handling unit according to the external static pressure adjustment period of each building area and at least two preset static pressure control opening ratio intervals to obtain the updated target external static pressure of the air handling unit corresponding to each building area includes: when the timing of the external static pressure adjustment period of any building area ends, updating the initial target external static pressure of the air handling unit corresponding to the building area according to the first target valve opening ratio of the building area and at least two preset static pressure control opening ratio intervals to obtain the updated target external static pressure of the air handling unit corresponding to the target building area; traversing the external static pressure adjustment periods of each building area to obtain the updated target external static pressure of the air handling unit corresponding to each building area. In this embodiment, the target external static pressure is updated through the external static pressure adjustment period. Compared with adjusting the target external static pressure of all building areas simultaneously, the flexibility of the central air conditioning system adjustment is improved to adapt to the adjustment requirements of different building areas. By setting at least two static pressure control opening ratio intervals, the accurate adjustment of the external static pressure of each building area is realized, automatically adapting to the total air volume demand of each building area and reducing the unnecessary energy consumption of the central air conditioning system.

[0152] After determining the external static pressure adjustment period of each building area according to the first target valve opening ratio of each building area and at least two preset cycle control opening ratio intervals, before updating the initial target external static pressure of each air handling unit according to the external static pressure adjustment period of each building area and at least two preset static pressure control opening ratio intervals to obtain the updated target external static pressure of the air handling unit corresponding to each building area, it further includes: adjusting the first valve opening of each air valve according to the air valve adjustment period of each room and the carbon dioxide concentration of each room to obtain the second valve opening of each air valve. In this embodiment, the automatic adjustment of the valve opening of each air valve is realized through the carbon dioxide concentration and air valve adjustment period of each room, achieving the automatic control of the air volume of each room and ensuring the user comfort of each room.

[0153] Updating the initial target external static pressure of each air handling unit according to the external static pressure adjustment period of each building area and at least two preset static pressure control opening ratio intervals to obtain the updated target external static pressure of the air handling unit corresponding to each building area includes: when the timing of the external static pressure adjustment period of any building area ends, determining the current second target valve opening ratio of the target building area, where the target building area is the building area where the timing of the external static pressure adjustment period ends; updating the initial target external static pressure of the air handling unit corresponding to the target building area according to the current second target valve opening ratio of the target building area and at least two preset static pressure control opening ratio intervals to obtain the updated target external static pressure of the air handling unit corresponding to the target building area; traversing the external static pressure adjustment periods of each building area to obtain the updated target external static pressure of the air handling unit corresponding to each building area. In this embodiment, the target external static pressure is updated through the first target valve opening ratio, improving the real-time performance of the response, and the updated target external static pressure can more accurately reflect the total air volume demand of the target building area.

[0154] Updating the initial target external static pressure of the air handling unit corresponding to a building area according to the first target valve opening ratio of the building area and at least two preset static pressure control opening ratio intervals to obtain the updated target external static pressure of the air handling unit corresponding to the target building area includes: if the first target valve opening ratio of the building area is within the range of the preset first static pressure control opening ratio interval, then reducing the initial target external static pressure of the air handling unit corresponding to the building area to obtain the updated target external static pressure of the air handling unit corresponding to the building area; if the first target valve opening ratio of the building area is within the range of the preset second static pressure control opening ratio interval, then determining the initial target external static pressure of the air handling unit corresponding to the building area as the updated target external static pressure of the air handling unit corresponding to the building area; if the first target valve opening ratio of the building area is within the range of the preset third static pressure control opening ratio interval, then increasing the initial target external static pressure of the air handling unit corresponding to the building area to obtain the updated target external static pressure of the air handling unit corresponding to the building area. In this embodiment, the target external static pressure of each room is updated by setting multiple static pressure control opening ratio intervals, improving the accuracy of control.

[0155] The method for determining the first target valve opening ratio corresponding to each building area according to the first valve opening of each air valve in each building area and the preset maximum valve opening includes: determining the rooms with the air valve in the open state in each building area as candidate rooms, and obtaining at least one candidate room in each building area; performing a difference operation on the first valve opening of the air valve corresponding to each candidate room and the preset maximum valve opening to obtain the first valve opening ratio of each candidate room; determining the maximum value of the first valve opening ratio of the building area according to the first valve opening ratio of each candidate room in each building area; and determining the maximum value of the first valve opening ratio as the first target valve opening ratio of the building area. In this embodiment, the subsequent calculation amount is reduced by screening candidate rooms, and the most unfavorable adjustment room is selected to determine the first target valve opening ratio, so that the central air-conditioning system can more accurately evaluate the total air volume demand of each building area, improve the flexibility of the central air-conditioning system, and achieve precise control.

[0156] Those skilled in the art can clearly understand that for the convenience and brevity of description, the specific working processes of the systems, devices, and units described above can refer to the corresponding processes in the foregoing method embodiments and will not be described herein again.

[0157] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, or all or 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 may 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 that can store program codes such as USB flash drives, mobile hard disks, read-only memory (ROM), random access memory (RAM), magnetic disks, or optical discs.

[0158] The above is the case. The above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them. 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 they can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. These modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. A method for controlling the external static pressure of a target machine, characterized in that, Applied to a central air-conditioning system, the central air-conditioning system is connected to the air handling units in each building area, and the central air-conditioning system is connected to the air valves in each room. The total air volume of the building area corresponding to each air handling unit is controlled by the target external static pressure of each air handling unit. Each building area includes at least one room. The target external static pressure control method includes: Obtain the initial target external static pressure of each air handling unit and the first valve opening of each air valve; Determine the first target valve opening ratio corresponding to each building area according to the first valve opening of each air valve in each building area and the preset maximum valve opening; Determine the external static pressure adjustment period of each building area according to the first target valve opening ratio of each building area and at least two preset cycle control opening ratio intervals; Update the initial target external static pressure of each air handling unit according to the external static pressure adjustment period of each building area and at least two preset static pressure control opening ratio intervals, and obtain the updated target external static pressure of the air handling unit corresponding to each building area.

2. The target external static pressure control method according to claim 1, characterized in that The determining the external static pressure adjustment period of each building area according to the first target valve opening ratio of each building area and at least two preset cycle control opening ratio intervals includes: When the first target valve opening ratio of any building area is within the preset first cycle control opening ratio interval, determine the first adjustment period as the external static pressure adjustment period of the building area; When the first target valve opening ratio of any building area is within the preset second cycle control opening ratio interval, determine the second adjustment period as the external static pressure adjustment period of the building area, and the second adjustment period is less than the first adjustment period; Traverse the first target valve opening ratio of each building area in turn to obtain the external static pressure adjustment period of each building area.

3. The target external static pressure control method according to claim 1, wherein The updating the initial target external static pressure of each air handling unit according to the external static pressure adjustment period of each building area and at least two preset static pressure control opening ratio intervals to obtain the updated target external static pressure of the air handling unit corresponding to each building area includes: When the timing of the external static pressure adjustment period of any building area ends, update the initial target external static pressure of the air handling unit corresponding to the building area according to the first target valve opening ratio of the building area and at least two preset static pressure control opening ratio intervals, and obtain the updated target external static pressure of the air handling unit corresponding to the target building area; Traverse the external static pressure adjustment period of each building area to obtain the updated target external static pressure of the air handling unit corresponding to each building area.

4. The target external static pressure control method according to claim 3, characterized in that The updating the initial target external static pressure of the air handling unit corresponding to the building area according to the first target valve opening ratio of the building area and at least two preset static pressure control opening ratio intervals to obtain the updated target external static pressure of the air handling unit corresponding to the target building area includes: If the first target valve opening ratio of the building area is within the preset first static pressure regulation opening ratio range, then reduce the initial target external static pressure of the air handling unit corresponding to the building area to obtain the updated target external static pressure of the air handling unit corresponding to the building area; If the first target valve opening ratio of the building area is within the preset second static pressure regulation opening ratio range, then determine the initial target external static pressure of the air handling unit corresponding to the building area as the updated target external static pressure of the air handling unit corresponding to the building area; If the first target valve opening ratio of the building area is within the preset third static pressure regulation opening ratio range, then increase the initial target external static pressure of the air handling unit corresponding to the building area to obtain the updated target external static pressure of the air handling unit corresponding to the building area.

5. The target external static pressure control method according to claim 1, characterized in that, The central air conditioning system is also respectively connected to the carbon dioxide sensors in each room, and controls the air volume of the room corresponding to the air valve through the air valve in each room. After determining the external static pressure adjustment period of each building area according to the first target valve opening ratio of each building area and the preset at least two cycle regulation opening ratio ranges; Before updating the initial target external static pressure of each air handling unit according to the external static pressure adjustment period of each building area and the preset at least two static pressure regulation opening ratio ranges to obtain the updated target external static pressure of the air handling unit corresponding to each building area, it further includes: Adjust the first valve opening of each air valve according to the air valve adjustment period of each room and the carbon dioxide concentration of each room to obtain the second valve opening of each air valve.

6. The target external static pressure control method according to claim 1, characterized in that Updating the initial target external static pressure of each air handling unit according to the external static pressure adjustment period of each building area and the preset at least two static pressure regulation opening ratio ranges to obtain the updated target external static pressure of the air handling unit corresponding to each building area includes: When the timing of the external static pressure adjustment period of any one building area ends, determine the current second target valve opening ratio of the target building area, where the target building area is the building area where the timing of the external static pressure adjustment period ends; Update the initial target external static pressure of the air handling unit corresponding to the target building area according to the current second target valve opening ratio of the target building area and the preset at least two static pressure regulation opening ratio ranges to obtain the updated target external static pressure of the air handling unit corresponding to the target building area; Traverse the external static pressure adjustment periods of each building area to obtain the updated target external static pressure of the air handling unit corresponding to each building area.

7. The target external static pressure control method according to claim 1, characterized in that The set most unfavorable adjustment room is the target maximum opening ratio room. Determining the first target valve opening ratio corresponding to each building area according to the first valve opening of each air valve in each building area and the preset maximum valve opening includes: Determine the rooms with the air valve status of open in each building area as candidate rooms to obtain at least one candidate room in each building area; Perform a difference operation between the first valve opening degree of the air valve corresponding to each candidate room and the preset maximum valve opening degree to obtain the first valve opening degree ratio of each candidate room. Determine the maximum value of the first valve opening degree ratio of the building area according to the first valve opening degree ratio of each candidate room in each building area. Determine the maximum value of the first valve opening degree ratio as the first target valve opening degree ratio of the building area.

8. An external static pressure control device for a target machine, characterized in that, Applied to a central air-conditioning system, the central air-conditioning system is connected to the air handling unit of each building area, and the central air-conditioning system is connected to the air valve of each room. The total air volume of the building area corresponding to the air handling unit is controlled by the target external static pressure of each air handling unit. Each building area includes at least one room. The target external static pressure control device includes: An acquisition module for acquiring the initial target external static pressure of each air handling unit and the first valve opening degree of each air valve. A processing module for determining the first target valve opening degree ratio corresponding to each building area according to the first valve opening degree of each air valve in each building area and the preset maximum valve opening degree. A determination module for determining the external static pressure adjustment period of each building area according to the first target valve opening degree ratio of each building area and the preset at least two cycle regulation opening degree ratio intervals. An update module for updating the initial target external static pressure of each air handling unit according to the external static pressure adjustment period of each building area and the preset at least two static pressure regulation opening degree ratio intervals to obtain the updated target external static pressure of the air handling unit corresponding to each building area.

9. A central air conditioning system, characterized in that, The central air-conditioning system includes: a memory and at least one processor, and instructions are stored in the memory. The at least one processor calls the instructions in the memory so that the central air-conditioning system executes the target external static pressure control method described in any one of claims 1-7.

10. A computer-readable storage medium having instructions stored thereon, characterized in that, The instructions execute the target external static pressure control method described in any one of claims 1-7 when being read and run.

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