An air volume allocation method and device of an air conditioning system, a terminal device, and a medium

Abstract

This invention discloses a method, apparatus, terminal equipment, and medium for air volume allocation in an air conditioning system. After acquiring the initial air volume and first damper opening of multiple air supply rooms, environmental data for each air supply room is collected, the required air volume is calculated, and based on the initial and required air volume of each air supply room, rooms requiring variable air volume are identified. Based on the initial and required air volume of each room requiring variable air volume, and the initial and first damper opening of each air supply room, the second damper opening of each air supply room is calculated, and a damper control command is generated. Based on the damper control command, each air supply room is controlled to adjust from the first damper opening to the second damper opening. This invention makes a coordinated damper opening adjustment for all rooms when the required air volume changes in one or more air supply rooms, greatly improving the accuracy of air volume allocation in the air conditioning system and solving the problem of uneven air volume distribution in variable air volume air conditioning systems.

Description

Technical Field

[0001] This invention relates to the field of air conditioning system control technology, and in particular to a method, device, terminal equipment and medium for air volume adjustment in an air conditioning system. Background Technology

[0002] Variable air volume (VAV) air conditioning systems install several VAV terminal units in each room or air-conditioned zone. These terminals adjust the airflow by changing the opening of the VAV terminal dampers based on the indoor temperature and setpoint, thereby reducing the energy consumption of the air conditioning unit's fan. VAV air conditioning systems offer advantages such as good indoor air quality, significant energy savings under partial load, and flexible zone control, and are now widely used.

[0003] In the actual operation of variable air volume (VAV) air conditioning systems, the required air volume for each room or air-conditioned area is often different. Currently, most VAV terminal dampers are controlled independently. When calculating the required air volume, only the demand of the room or air-conditioned area is considered, without taking into account the air volume demand of other rooms or air-conditioned areas. There is a lack of linkage between the VAV air conditioning units in each room. When controlling which dampers in the room that needs to change the required air volume, the dampers in other rooms are not adjusted accordingly. This can easily lead to uneven air volume distribution in the VAV air conditioning system, and the air volume of each room or air-conditioned area does not match the actual required air volume, resulting in inaccurate air volume scheduling.

[0004] Therefore, there is an urgent need for an air volume allocation strategy for air conditioning systems to solve the problem of inaccurate air volume scheduling in current air conditioning systems. Summary of the Invention

[0005] This invention provides a method, apparatus, terminal equipment, and medium for air volume allocation in an air conditioning system, in order to improve the accuracy of air volume scheduling in an air conditioning system.

[0006] To address the above problems, one embodiment of the present invention provides a method for adjusting the air volume of an air conditioning system, comprising: Obtain the initial air supply volume and the opening degree of the first air valve for several air supply rooms; Real-time collection of environmental data for each air supply room; calculation of the required air volume for each air supply room. Based on the initial air volume and required air volume of each air supply room, a number of rooms to be variable air volume are identified among the air supply rooms. Based on the initial air volume and required air volume of each room to be adjusted, as well as the initial air volume and the opening degree of the first air valve of each air supply room, the opening degree of the second air valve of each air supply room is calculated, and an air valve control command is generated based on the opening degree of each second air valve. Based on the air valve control command, each air supply room is controlled to adjust from the opening degree of the first air valve to the opening degree of the second air valve.

[0007] As an improvement to the above solution, the step of calculating the second air valve opening of each air supply room based on the initial air supply volume and required air supply volume of each room to be configured for variable air volume, and the initial air supply volume and first air valve opening of each air supply room, includes: Repeat the calculation steps for the single variable air volume room damper until all rooms to be changed air volume have been completed and then stop. Output the process values ​​of the opening degree of several single variable air volume room dampers corresponding to each air supply room, and calculate the second damper opening degree of each air supply room based on the process values ​​of the opening degree of several single variable air volume room dampers. The calculation steps for the single variable air volume room damper include: Select one room from the several rooms to be changed air volume that have not performed the single variable air volume room damper calculation step as the target room to be changed air volume. Based on the initial air volume and first air valve opening of each air supply room, and the required air volume of the target variable air volume room, the process value of the single variable air volume room air valve opening of each air supply room is calculated after the target variable air volume room reaches the required air volume.

[0008] As an improvement to the above scheme, the air supply room includes: a first air supply room, a second air supply room, a third air supply room, and a fourth air supply room; the opening degree of the single variable air volume room damper includes: the opening degree of the first single variable air volume room damper, the opening degree of the second single variable air volume room damper, the opening degree of the third single variable air volume room damper, and the opening degree of the fourth single variable air volume room damper; the process value of calculating the single variable air volume room damper opening degree of each air supply room after the target single variable air volume room reaches the required air supply volume, based on the initial air supply volume and the first damper opening degree of each air supply room, and the required air supply volume of the target single variable air volume room, includes: Determine the positional relationship between each of the air supply rooms and the target room to be adjusted in terms of air volume; If the first air supply room is not the target variable air volume room and is located closest to the air supply unit, then based on the initial air supply volume and the opening of the first damper in the first air supply room, and the required air supply volume of the target variable air volume room, the preset first fixed air volume damper calculation formula is substituted to calculate the opening of the first single variable air volume room damper in the first air supply room; wherein, the specific calculation formula for the first fixed air volume damper is: In the formula, The opening degree of the first variable air volume room damper in the first air supply room closest to the air supply unit. This represents the initial total air volume. The increase in air volume caused by the air supply volume required by the room with the target variable air volume. The opening degree of the first air valve in the air supply room closest to the air supply unit; If the second air supply room is not the target variable air volume room, not the location closest to the air supply unit, and is closer to the air supply unit than the target variable air volume room, then based on the initial air supply volume of the second air supply room, the opening of the first damper, and the required air supply volume of the target variable air volume room, the preset calculation formula for the second variable air volume damper is used to calculate the opening of the second variable air volume room damper in the second air supply room; wherein, the specific calculation formula for the second variable air volume damper is as follows: In the formula, Let represent the opening degree of the second single variable air volume room damper in the p-th air supply room. Let be the initial air supply volume for the i-th air supply room. Let the opening degree of the first air valve in the p-th air supply room be denoted as ; If the third air supply room is the target variable air volume room, then based on the initial air supply volume of the third air supply room, the opening of the first damper, and the required air supply volume of the target variable air volume room, the preset variable air volume damper calculation formula is substituted to calculate the opening of the third single variable air volume room damper of the third air supply room; wherein, the variable air volume damper calculation formula is specifically as follows: In the formula, Let the opening degree of the third single variable air volume room damper in the nth air supply room be given. Let be the initial air supply volume for the i-th air supply room. Let represent the opening degree of the first air valve in the nth air supply room. The flow coefficient of the variable air volume valve; If the fourth air supply room is not the target variable air volume room, is not the closest to the air supply unit, and is closer to the air supply unit than the target variable air volume room, then the opening degree of the fourth single variable air volume room damper of the fourth air supply room is the opening degree of the first damper of the fourth air supply room.

[0009] As an improvement to the above scheme, the step of calculating the second air valve opening of each of the several air supply rooms based on the process values ​​of the air valve openings of the single variable air volume rooms includes: Based on the process value of the single variable air volume room damper opening of each air supply room after a target variable air volume room reaches the required air supply volume, a single variable air volume room damper opening matrix is ​​formed. In the formula, This is the single-variable-air-volume room damper opening matrix for all supply rooms corresponding to a target variable-air-volume room. This represents the process value of the opening of the single variable air volume room damper in the first room. The process value of the opening degree of the single variable air volume room damper in the m-th room. Based on the single-variable-air-volume room damper opening matrix of all supply rooms corresponding to each target variable-air-volume room, the preset matrix multiplication formula is substituted to obtain the total damper opening matrix; wherein, each element in the total damper opening matrix represents the second damper opening of each supply room; the matrix multiplication formula is specifically as follows: In the formula, l represents the number of rooms with the target variable air volume. This represents the valve opening matrix for all supply rooms corresponding to the target room with variable air volume. This is the valve opening matrix.

[0010] As an improvement to the above solution, the step of identifying several rooms to be variable air volume from among several air supply rooms based on the initial air supply volume and the required air supply volume of each air supply room includes: Determine whether the initial air supply volume and the required air supply volume are consistent for each of the aforementioned air supply rooms; If the initial air volume and the required air volume of the air supply room are the same, then the air supply room corresponding to the initial air volume and the required air volume are not the room to be changed. If the initial air volume and the required air volume of the air supply room are inconsistent, the air supply room corresponding to the inconsistency between the initial air volume and the required air volume is designated as the room to be configured for variable air volume.

[0011] As an improvement to the above solution, the real-time acquisition of environmental data for each air supply room and the calculation of the required air volume for each air supply room include: Real-time data collection of air density, volume, detection temperature, and cooling / heating load for each air supply room; Based on the air density, volume, detection temperature, cooling load heat of each air supply room, and the user-set temperature, the required air supply volume for each air supply room is obtained by substituting these into a preset formula for calculating the required air supply volume; wherein, the formula for calculating the required air supply volume is: In the formula, For the cooling load of the air supply area or room; For the volume of the air supply area or room; To detect the temperature in the air supply area or air-conditioned room; To meet the required air volume; To set the temperature; air density; This refers to the specific heat capacity of air at constant pressure.

[0012] Accordingly, one embodiment of the present invention also provides an air volume distribution device for an air conditioning system, including: a data acquisition module, a data calculation module, a room selection module, and a data control module; The data acquisition module is used to acquire the initial air supply volume and the opening degree of the first air valve in several air supply rooms. The data calculation module is used to collect environmental data of each air supply room in real time and calculate the required air volume of each air supply room. The room selection module is used to identify a number of rooms to be selected for variable air volume from a number of air supply rooms based on the initial air supply volume and the required air supply volume of each air supply room. The data control module is used to calculate the second air valve opening of each air supply room based on the initial air supply volume and required air supply volume of each air supply room, as well as the initial air supply volume and the opening of the first air valve of each air supply room, and generate an air valve control command based on the second air valve opening, and control each air supply room to adjust from the first air valve opening to the second air valve opening based on the air valve control command.

[0013] Accordingly, one embodiment of the present invention also provides an air volume distribution system for an air conditioning system, comprising: an air volume distribution device for an air conditioning system, a plurality of air supply rooms, a plurality of data acquisition devices, and a plurality of variable air volume (VAV) terminal dampers; wherein the air volume distribution device for the air conditioning system is connected to a plurality of the data acquisition devices and a plurality of the VAV terminal dampers respectively; each of the data acquisition devices and each of the VAV terminal dampers is disposed in a plurality of air supply rooms; the air volume distribution device for the air conditioning system is applied to the air volume distribution method for an air conditioning system as described in the present invention.

[0014] Accordingly, one embodiment of the present invention also provides a computer terminal device, including a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements an air volume control method for an air conditioning system as described in the present invention.

[0015] Accordingly, one embodiment of the present invention also provides a computer-readable storage medium, the computer-readable storage medium including a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to perform an air volume regulation method for an air conditioning system as described in the present invention.

[0016] As can be seen from the above, the present invention has the following beneficial effects: This invention provides a method for air volume allocation in an air conditioning system. After obtaining the initial air volume and the opening degree of the first air valve in multiple air supply rooms, the environmental data of each air supply room is collected in real time, the required air volume is calculated, and the room to be adjusted in air volume is identified among the multiple air supply rooms based on the initial air volume and the required air volume of each air supply room. Based on the initial air volume and the required air volume of each room to be adjusted, the initial air volume of each air supply room and the opening degree of the first air valve, the opening degree of the second air valve of each air supply room is calculated, and a valve control command is generated based on the second air valve opening. Based on the valve control command, each air supply room is controlled to adjust from the opening degree of the first air valve to the opening degree of the second air valve. This invention considers both rooms with changing air supply volume requirements and rooms with unchanged air supply volume requirements. It ensures that rooms with changing air supply volume requirements are adjusted to the required air supply volume, while rooms with unchanged air supply volume requirements are maintained at the initial air supply volume. Compared to existing technologies that only adjust the air supply volume of a single room with changing air volume, this invention, based on the interconnectivity of the air conditioning system, makes interconnected adjustments to the air valve openings of all rooms when the air supply volume requirements change, greatly improving the accuracy of air volume allocation in the air conditioning system. Attached Figure Description

[0017] Figure 1 This is a flowchart illustrating an air volume adjustment method for an air conditioning system according to an embodiment of the present invention. Figure 2 This is a schematic diagram of the air volume distribution device of an air conditioning system provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the air volume distribution system of an air conditioning system provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the air volume distribution system of an air conditioning system provided in another embodiment of the present invention; Figure 5 This is an embodiment of the present invention that provides the air volume and damper opening for four rooms when the required air supply volume remains unchanged; Figure 6 This invention provides, in one embodiment, the air volume and damper opening for four rooms when the required air volume for a single room changes; Figure 7 This invention provides, in one embodiment, the air volume and damper opening for four rooms when the required air volume for multiple rooms changes; Figure 8 This is a schematic diagram of a terminal device structure provided in an embodiment of the present invention. Detailed Implementation

[0018] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0019] Example 1 See Figure 1 , Figure 1 This is a flowchart illustrating an airflow distribution method for an air conditioning system according to an embodiment of the present invention, as shown below. Figure 1 As shown, this embodiment includes steps 101 to 104, and the specific steps are as follows: Step 101: Obtain the initial air supply volume and the opening degree of the first air valve for several air supply rooms.

[0020] In this embodiment, the opening degree of multiple terminal or air conditioning zone air valves is controlled. The total air volume Q of the air conditioning unit is used as the control variable. By coupling the dynamic influence between the control variables, a mathematical relationship is established between them. The temperature of one or more terminals or air-conditioned areas is detected, the difference between the current temperature and the set temperature is compared, the required air volume is calculated, and based on the required air volume of each terminal or air-conditioned area, advanced control theory and intelligent detection are used to quickly provide the valve opening signal of each terminal and the operating frequency of the air conditioning unit fan.

[0021] Step 102: Collect environmental data for each air supply room in real time and calculate the required air volume for each air supply room.

[0022] In this embodiment, the real-time acquisition of environmental data for each air supply room and the calculation of the required air volume for each air supply room include: Real-time data collection of air density, volume, detection temperature, and cooling / heating load for each air supply room; Based on the air density, volume, detection temperature, cooling load heat of each air supply room, and the user-set temperature, the required air supply volume for each air supply room is obtained by substituting these into a preset formula for calculating the required air supply volume; wherein, the formula for calculating the required air supply volume is: In the formula, For the cooling load of the air supply area or room; For the volume of the air supply area or room; To detect the temperature in the air supply area or air-conditioned room; To meet the required air volume; To set the temperature; air density; This refers to the specific heat capacity of air at constant pressure.

[0023] The required air volume calculated in this embodiment does not consider the influence of the heat capacity of the inner surface of the air supply area or room enclosure on the indoor temperature. The air state calculation model is based on the law of conservation of energy.

[0024] Step 103: Based on the initial air volume and required air volume of each air supply room, identify a number of rooms to be variable air volume among the air supply rooms.

[0025] In this embodiment, the step of identifying several rooms to be variable air volume from among several air supply rooms based on the initial air supply volume and the required air supply volume of each air supply room includes: Determine whether the initial air supply volume and the required air supply volume are consistent for each of the aforementioned air supply rooms; If the initial air volume and the required air volume of the air supply room are the same, then the air supply room corresponding to the initial air volume and the required air volume are not the room to be changed. If the initial air volume and the required air volume of the air supply room are inconsistent, the air supply room corresponding to the inconsistency between the initial air volume and the required air volume is designated as the room to be configured for variable air volume.

[0026] Step 104: Based on the initial air volume and required air volume of each room to be changed, as well as the initial air volume and first air valve opening of each air supply room, calculate the second air valve opening of each air supply room, generate an air valve control command based on the second air valve opening, and control each air supply room to adjust from the first air valve opening to the second air valve opening based on the air valve control command.

[0027] In this embodiment, calculating the second air valve opening of each air supply room based on the initial air supply volume and required air supply volume of each room to be configured for variable air volume, and the initial air supply volume and first air valve opening of each air supply room, includes: Repeat the calculation steps for the single variable air volume room damper until all rooms to be changed air volume have been completed and then stop. Output the process values ​​of the opening degree of several single variable air volume room dampers corresponding to each air supply room, and calculate the second damper opening degree of each air supply room based on the process values ​​of the opening degree of several single variable air volume room dampers. The calculation steps for the single variable air volume room damper include: Select one room from the several rooms to be changed air volume that have not performed the single variable air volume room damper calculation step as the target room to be changed air volume. Based on the initial air volume and first air valve opening of each air supply room, and the required air volume of the target variable air volume room, the process value of the single variable air volume room air valve opening of each air supply room is calculated after the target variable air volume room reaches the required air volume.

[0028] In this embodiment, the air supply rooms include: a first air supply room, a second air supply room, a third air supply room, and a fourth air supply room; the opening degree of the single variable air volume room damper includes: the opening degree of the first single variable air volume room damper, the opening degree of the second single variable air volume room damper, the opening degree of the third single variable air volume room damper, and the opening degree of the fourth single variable air volume room damper; the process of calculating the single variable air volume room damper opening degree of each air supply room after the target single variable air volume room reaches the required air supply volume, based on the initial air supply volume and the first damper opening degree of each air supply room, and the required air supply volume of the target single variable air volume room, includes: Determine the positional relationship between each of the air supply rooms and the target room to be adjusted in terms of air volume; If the first air supply room is not the target variable air volume room and is located closest to the air supply unit, then based on the initial air supply volume and the opening of the first damper in the first air supply room, and the required air supply volume of the target variable air volume room, the preset first fixed air volume damper calculation formula is substituted to calculate the opening of the first single variable air volume room damper in the first air supply room; wherein, the specific calculation formula for the first fixed air volume damper is: In the formula, The opening degree of the first variable air volume room damper in the first air supply room closest to the air supply unit. This represents the initial total air volume. The increase in air volume caused by the air supply volume required by the room with the target variable air volume. The opening degree of the first air valve in the air supply room closest to the air supply unit; If the second air supply room is not the target variable air volume room, not the location closest to the air supply unit, and is closer to the air supply unit than the target variable air volume room, then based on the initial air supply volume of the second air supply room, the opening of the first damper, and the required air supply volume of the target variable air volume room, the preset calculation formula for the second variable air volume damper is used to calculate the opening of the second variable air volume room damper in the second air supply room; wherein, the specific calculation formula for the second variable air volume damper is as follows: In the formula, Let represent the opening degree of the second single variable air volume room damper in the p-th air supply room. Let be the initial air supply volume for the i-th air supply room. Let the opening degree of the first air valve in the p-th air supply room be denoted as ; If the third air supply room is the target variable air volume room, then based on the initial air supply volume of the third air supply room, the opening of the first damper, and the required air supply volume of the target variable air volume room, the preset variable air volume damper calculation formula is substituted to calculate the opening of the third single variable air volume room damper of the third air supply room; wherein, the variable air volume damper calculation formula is specifically as follows: In the formula, Let the opening degree of the third single variable air volume room damper in the nth air supply room be given. Let be the initial air supply volume for the i-th air supply room. Let the opening degree of the first air valve in the nth air supply room be denoted as ; If the fourth air supply room is not the target variable air volume room, is not the closest to the air supply unit, and is closer to the air supply unit than the target variable air volume room, then the opening degree of the fourth single variable air volume room damper of the fourth air supply room is the opening degree of the first damper of the fourth air supply room.

[0029] In a specific embodiment, to better illustrate the calculation method for the opening of the damper in a single variable air volume room, the following example is provided: See Figure 4 , Figure 4 This embodiment provides a variable air volume (VAV) air conditioning system, assuming the number of rooms is m (m ≥ 1). When the load of one or more rooms changes, the system fully considers the impact of air volume adjustment on other rooms and quickly provides the opening degree of the VAV terminal damper for each room. The total air volume Q of the air conditioning unit can meet the room load requirements and improve environmental comfort while reducing fan energy consumption. Assuming the flow coefficient of the variable air volume valve is , No. The required air volume for each room is When air conditioning supplies air through a terminal air valve, the relationship between the airflow volume and the valve opening can be expressed as: The relationship between degrees can be expressed as: The required airflow for the first room. , No. The required air volume for each room In actual operation, variable air volume (VAV) air conditioning systems often require changes in air volume in multiple rooms. The adjustment process of the terminal air valves in each room is relatively independent. Therefore, the adjustment process of multiple rooms can be regarded as the sum of single adjustment processes.

[0030] When the The required air volume for each room has increased. At that time, the first The required air volume for each room varies as follows: .

[0031] The required total air volume change is as follows: Adjust the operating frequency of the air conditioning unit fan according to the required total air volume to output the required air volume.

[0032] Since the load or set temperature of other rooms remains unchanged, to avoid changes in the air volume demand of a room affecting the air volume of other rooms, it is assumed that the opening degree of all terminal dampers changes, where the first... The opening degree of the terminal air valve in each room changes as follows: .

[0033] For the Each room and its required air volume The original terminal air valve opening degree was New terminal air valve opening .

[0034] For the A room (i.e., the first air supply room as described in this invention), when hour, ; Solving ; Because it's only the first The required air volume for each room has increased. In other words, the airflow in the first room did not change, therefore: , ; Assumption For the room after the first room and before the nth room (i.e., the second air supply room as described in this invention), when hour(, ; Solving ; Similarly, we can deduce the following using mathematical induction: , ; For the The required air volume in the room (i.e., the third air supply room described in this invention) has changed. ; ; ; Solving ; For the The room following the first room (i.e., the fourth air supply room as described in this invention), the first ( ) Air volume required for each room ; ; ; Solving , ; Through the above derivation, we obtain the changes in the opening degree of the terminal air dampers in each room when the required air volume of a single room changes. Furthermore, we obtain the relationship matrix of the changes in the opening degree of the terminal air dampers: In the formula and The initial state of the terminal damper opening in the strain-direction air conditioning system and the state after the system air volume changes are respectively analyzed: , .

[0035] It is worth noting that although the damper opening change matrix is ​​calculated based on the change in the air supply volume of a single room, the opening change matrix is ​​still applicable to the simultaneous change in air volume of multiple rooms. This is because the damper opening represents the state when the system is in equilibrium.

[0036] In this embodiment, calculating the second air valve opening of each air supply room based on the process values ​​of the air valve openings of the plurality of single variable air volume rooms includes: Based on the process value of the single variable air volume room damper opening of each air supply room after a target variable air volume room reaches the required air supply volume, a single variable air volume room damper opening matrix is ​​formed. In the formula, This is the single-variable-air-volume room damper opening matrix for all supply rooms corresponding to a target variable-air-volume room. This represents the process value of the opening of the single variable air volume room damper in the first room. The process value of the opening degree of the single variable air volume room damper in the m-th room; Based on the single-variable-air-volume room damper opening matrix of all supply rooms corresponding to each target variable-air-volume room, the preset matrix multiplication formula is substituted to obtain the total damper opening matrix; wherein, each element in the total damper opening matrix represents the second damper opening of each supply room; the matrix multiplication formula is specifically as follows: In the formula, l represents the number of rooms with the target variable air volume. This represents the valve opening matrix for all supply rooms corresponding to the target room with variable air volume. This is the valve opening matrix.

[0037] For the system to appear The opening matrix after the air supply volume demand of each room changes simultaneously is obtained through calculation. Thus, it was obtained. When the air supply demand of each room changes simultaneously, the opening degree of all terminal air valves in the system is adjusted. The control module adjusts the opening degree of each terminal air valve according to the opening signal of each terminal air valve to deliver the required air supply to each terminal.

[0038] Optionally, an air volume sensor can be installed after the terminal air valve to verify the accuracy of the terminal air valve's control.

[0039] In one specific embodiment, to better illustrate the change in damper opening after a change in room air demand, please refer to [link to relevant documentation]. Figure 5 , Figure 6 and Figure 7 The unit for air supply volume can be cubic meters per hour or cubic meters per second; Figure 5 Given the initial air supply volume and first damper opening value for the four rooms, when the air supply volume requirement of one room in the variable air volume (VAV) air conditioning system changes (e.g., the air supply volume requirement for room 3 changes from 130.92 to 250), the air supply volume requirement and terminal damper opening value for each room are as follows: Figure 6 As shown, the total air volume at this time is 1119.08. When the air demand of multiple rooms in the variable air volume (VAV) air conditioning system changes, such as the air demand of room 2 changing from 249.37 to 200, and the air demand of room 3 changing from 130.92 to 250, the air demand of each room and the opening of the terminal damper are as follows. Figure 7 As shown, the total air volume is 1069.70 at this time. At this point, regardless of whether the air supply demand of a single room or multiple rooms changes, the change in the damper opening is consistent with the calculation result provided by the formula in this embodiment. When the airflow in a single room (room 3) changes, it can be seen that the rooms preceding the changing room (rooms 1 and 2) all change their terminal damper openings to maintain a constant airflow. Similarly, when the airflow in multiple rooms (rooms 2 and 3) changes, it can be seen that the rooms preceding the changing room (room 1) all change their terminal damper openings to maintain a constant airflow. From the above, it can be seen that when the airflow in a supply room changes, this invention maintains the airflow in all supply rooms at a preset value by adjusting the terminal damper opening of each supply room in a coordinated manner.

[0040] See Figure 2 , Figure 2This is a schematic diagram of the structure of an air volume distribution device for an air conditioning system according to an embodiment of the present invention, including: a data acquisition module 201, a data calculation module 202, a room selection module 203, and a data control module 204; The data acquisition module is used to acquire the initial air supply volume and the opening degree of the first air valve in several air supply rooms. The data calculation module is used to collect environmental data of each air supply room in real time and calculate the required air volume of each air supply room. The room selection module is used to identify a number of rooms to be selected for variable air volume from a number of air supply rooms based on the initial air supply volume and the required air supply volume of each air supply room. The data control module is used to calculate the second air valve opening of each air supply room based on the initial air supply volume and required air supply volume of each air supply room, as well as the initial air supply volume and the opening of the first air valve of each air supply room, and generate an air valve control command based on the second air valve opening, and control each air supply room to adjust from the first air valve opening to the second air valve opening based on the air valve control command.

[0041] It is understood that the above system embodiments correspond to the method embodiments of the present invention, and can implement the air volume adjustment method of the air conditioning system provided by any of the above method embodiments of the present invention.

[0042] See Figure 3 , Figure 3 This is a schematic diagram of the structure of an air conditioning system air volume distribution device according to an embodiment of the present invention, including: an air conditioning system air volume distribution device 301, a plurality of air supply rooms 302, a plurality of data acquisition devices 303, and a plurality of variable air volume terminal air valves 304; wherein, the air conditioning system air volume distribution device is connected to the plurality of data acquisition devices and the plurality of variable air volume terminal air valves respectively; each of the data acquisition devices and each of the variable air volume terminal air valves is disposed in each air supply room; the air conditioning system air volume distribution device is applied to the air volume distribution method of the air conditioning system as described in the present invention.

[0043] This embodiment acquires the initial air volume and the opening degree of the first air valve in multiple air supply rooms, collects environmental data of each air supply room in real time, calculates the required air volume, and identifies the room to be adjusted in terms of air volume based on the initial air volume and the required air volume of each air supply room. Based on the initial air volume and the required air volume of each room to be adjusted, the initial air volume of each air supply room and the opening degree of the first air valve, the opening degree of the second air valve of each air supply room is calculated, and an air valve control command is generated based on the opening degree of the second air valve. Based on the air valve control command, each air supply room is controlled to adjust from the opening degree of the first air valve to the opening degree of the second air valve. This invention considers both rooms with changing air supply volume requirements and rooms with unchanged air supply volume requirements. It ensures that rooms with changing air supply volume requirements are adjusted to the required air supply volume, while rooms with unchanged air supply volume requirements are maintained at the initial air supply volume. Compared to existing technologies that only adjust the air supply volume of a single room with changing air volume, this invention, based on the interconnectivity of the air conditioning system, makes interconnected adjustments to the air valve openings of all rooms when the air supply volume requirements change, greatly improving the accuracy of air volume allocation in the air conditioning system.

[0044] Example 2 See Figure 8 , Figure 8 This is a schematic diagram of the terminal device structure provided in an embodiment of the present invention.

[0045] One terminal device in this embodiment includes: a processor 801, a memory 802, and a computer program stored in the memory 802 and executable on the processor 801. When the processor 801 executes the computer program, it implements the steps of the airflow control methods for the various air conditioning systems described above in this embodiment, for example... Figure 1 All steps of the air volume control method for the air conditioning system shown. Alternatively, when the processor executes the computer program, it implements the functions of each module in the above-described device embodiments, for example: Figure 2 All modules of the air volume control device of the air conditioning system shown.

[0046] In addition, embodiments of the present invention also provide a computer-readable storage medium, the computer-readable storage medium including a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to perform the air volume adjustment method of the air conditioning system as described in any of the above embodiments.

[0047] Those skilled in the art will understand that the schematic diagram is merely an example of a terminal device and does not constitute a limitation on the terminal device. It may include more or fewer components than shown in the diagram, or combine certain components, or different components. For example, the terminal device may also include input / output devices, network access devices, buses, etc.

[0048] The processor 801 may be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or any conventional processor. The processor 801 is the control center of the terminal device, connecting all parts of the terminal device through various interfaces and lines.

[0049] The memory 802 can be used to store the computer programs and / or modules. The processor 801 implements various functions of the terminal device by running or executing the computer programs and / or modules stored in the memory and by calling the data stored in the memory 802. The memory 802 may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function (such as sound playback function, image playback function, etc.), etc.; the data storage area may store data created according to the use of the mobile phone (such as audio data, phonebook, etc.). In addition, the memory may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, memory, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0050] Wherein, if the modules / units integrated in the terminal device are implemented as software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, recording media, USB flash drives, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc.

[0051] It should be noted that the device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate, and the components shown as units may or may not be physical units; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, in the accompanying drawings of the device embodiments provided by this invention, the connection relationships between modules indicate that they have communication connections, which can be specifically implemented as one or more communication buses or signal lines. Those skilled in the art can understand and implement this without any creative effort.

[0052] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A method of air volume adjustment of an air conditioning system, characterized by, include: Obtain the initial air supply volume and the opening degree of the first air valve for several air supply rooms; Real-time collection of environmental data for each air supply room; calculation of the required air volume for each air supply room. Based on the difference between the initial air volume and the required air volume of each air supply room, several rooms to be variable air volume are identified among the several air supply rooms. Based on the initial air volume and required air volume of each room to be changed, as well as the initial air volume and first air valve opening of each air supply room, the second air valve opening of each air supply room is calculated, and an air valve control command is generated based on the second air valve opening. Based on the air valve control command, each air supply room is controlled to adjust from the first air valve opening to the second air valve opening. The step of calculating the second air valve opening of each air supply room based on the initial air supply volume and required air supply volume of each room to be configured for variable air volume, and the initial air supply volume and first air valve opening of each air supply room, includes: Repeat the calculation steps for the single variable air volume room damper until all rooms to be changed air volume have been completed and then stop. Output the process values ​​of the opening degree of several single variable air volume room dampers corresponding to each air supply room, and calculate the second damper opening degree of each air supply room based on the process values ​​of the opening degree of several single variable air volume room dampers. The calculation steps for the single variable air volume room damper include: Select one room from the several rooms to be changed air volume that have not performed the single variable air volume room damper calculation step as the target room to be changed air volume. Based on the initial air volume and first air valve opening of each air supply room, and the required air volume of the target variable air volume room, calculate the process value of the single variable air volume room air valve opening of each air supply room after the target variable air volume room reaches the required air volume. The step of identifying several rooms to be variable air volume from among the several air supply rooms based on the initial air supply volume and the required air supply volume of each of the several air supply rooms includes: Determine whether the initial air supply volume and the required air supply volume are consistent for each of the aforementioned air supply rooms; If the initial air volume and the required air volume of the air supply room are the same, then the air supply room corresponding to the initial air volume and the required air volume being the same will not be the room to be changed air volume. If the initial air volume and the required air volume of the air supply room are inconsistent, the air supply room corresponding to the inconsistency between the initial air volume and the required air volume is designated as the room to be configured for variable air volume.

2. The air volume regulating method of the air conditioning system according to claim 1, wherein The air supply rooms include: a first air supply room, a second air supply room, a third air supply room, and a fourth air supply room; the opening degree of the single variable air volume room damper includes: the opening degree of the first single variable air volume room damper, the opening degree of the second single variable air volume room damper, the opening degree of the third single variable air volume room damper, and the opening degree of the fourth single variable air volume room damper; the process value of calculating the single variable air volume room damper opening degree of each air supply room after the target single variable air volume room reaches the required air supply volume, based on the initial air supply volume and the first damper opening degree of each air supply room, and the required air supply volume of the target single variable air volume room, includes: Determine the positional relationship between each of the air supply rooms and the target room to be adjusted in terms of air volume; If the first air supply room is not the target variable air volume room and is located closest to the air supply unit, then based on the initial air supply volume and the opening of the first damper in the first air supply room, and the required air supply volume of the target variable air volume room, the preset first fixed air volume damper calculation formula is substituted to calculate the opening of the first single variable air volume room damper in the first air supply room; wherein, the specific calculation formula for the first fixed air volume damper is as follows: In the formula, The opening degree of the first variable air volume room damper in the first air supply room closest to the air supply unit. This represents the initial total air volume. The increase in air volume caused by the air supply volume required by the room with the target variable air volume. The opening degree of the first air valve in the air supply room closest to the air supply unit; If the second air supply room is not the target variable air volume room, not the location closest to the air supply unit, and is closer to the air supply unit than the target variable air volume room, then based on the initial air supply volume of the second air supply room, the opening of the first damper, and the required air supply volume of the target variable air volume room, the preset calculation formula for the second variable air volume damper is used to calculate the opening of the second variable air volume room damper in the second air supply room; wherein, the specific calculation formula for the second variable air volume damper is as follows: In the formula, Let represent the opening degree of the second single variable air volume room damper in the p-th air supply room. Let be the initial air supply volume for the i-th air supply room. Let the opening degree of the first air valve in the p-th air supply room be denoted as ; If the third air supply room is the target variable air volume room, then based on the initial air supply volume of the third air supply room, the opening of the first damper, and the required air supply volume of the target variable air volume room, the preset variable air volume damper calculation formula is substituted to calculate the opening of the third single variable air volume room damper of the third air supply room; wherein, the variable air volume damper calculation formula is specifically as follows: In the formula, Let the opening degree of the third single variable air volume room damper in the nth air supply room be given. Let be the initial air supply volume for the i-th air supply room. Let represent the opening degree of the first air valve in the nth air supply room. The flow coefficient of the variable air volume valve; If the fourth air supply room is not the target variable air volume room, is not the closest to the air supply unit, and is closer to the air supply unit than the target variable air volume room, then the opening degree of the fourth single variable air volume room damper of the fourth air supply room is the opening degree of the first damper of the fourth air supply room.

3. The air volume adjustment method for an air conditioning system according to claim 1, characterized in that, The real-time collection of environmental data for each of the air supply rooms and the calculation of the required air volume for each air supply room include: Real-time data collection of air density, volume, detection temperature, and cooling / heating load for each air supply room; Based on the air density, volume, detection temperature, cooling load heat of each air supply room, and the user-set temperature, the required air supply volume for each air supply room is obtained by substituting these into a preset formula for calculating the required air supply volume; wherein, the formula for calculating the required air supply volume is: In the formula, For the cooling load of the air supply area or room; For the volume of the air supply area or room; To detect the temperature in the air supply area or air-conditioned room; To meet the required air volume; To set the temperature; air density; This refers to the specific heat capacity of air at constant pressure.

4. An air volume regulating device for an air conditioning system, characterized in that, include: Data acquisition module, data calculation module, room selection module, and data control module; The data acquisition module is used to acquire the initial air supply volume and the opening degree of the first air valve in several air supply rooms. The data calculation module is used to collect environmental data of each air supply room in real time and calculate the required air volume of each air supply room. The room selection module is used to identify a number of rooms with variable air volume from a plurality of air supply rooms based on the initial air supply volume and the required air supply volume of each air supply room. The step of identifying the number of rooms with variable air volume from a plurality of air supply rooms based on the initial air supply volume and the required air supply volume of each air supply room includes: determining whether the initial air supply volume and the required air supply volume of each air supply room are consistent; if the initial air supply volume and the required air supply volume of the air supply room are consistent, then the air supply room corresponding to the consistent initial air supply volume and the required air supply volume is not considered a room with variable air volume; if the initial air supply volume and the required air supply volume of the air supply room are inconsistent, then the air supply room corresponding to the inconsistent initial air supply volume and the required air supply volume is considered a room with variable air volume. The data control module is used to calculate the second air valve opening of each air supply room based on the initial air volume and required air volume of each air supply room, and the initial air volume and first air valve opening of each air supply room, and to generate an air valve control command based on the second air valve opening, and to control each air supply room to adjust from the first air valve opening to the second air valve opening based on the air valve control command; wherein, the step of calculating the second air valve opening of each air supply room based on the initial air volume and required air volume of each air supply room, and the initial air volume and first air valve opening of each air supply room includes: repeatedly executing the single variable air volume room air valve calculation step until all air supply rooms have been completed and then stopping, outputting the process values ​​of the several single variable air volume room air valve openings corresponding to each air supply room, and calculating the second air valve opening of each air supply room based on the process values ​​of the several single variable air volume room air valve openings. The single variable air volume room damper calculation step includes: selecting one room to be changed as the target room to be changed as one of the several rooms to be changed from the ones that have not performed the single variable air volume room damper calculation step; and calculating the process value of the single variable air volume room damper opening of each air supply room after the target room to be changed reaches the required air supply volume, based on the initial air supply volume and the opening degree of the first damper of each air supply room, and the required air supply volume of the target room to be changed.

5. An air volume control system for an air conditioning system, characterized in that, include: An air conditioning system includes an air volume distribution device, several air supply rooms, several data acquisition devices, and several variable air volume (VAV) terminal dampers; wherein the air volume distribution device is connected to several of the data acquisition devices and several of the VAV terminal dampers; each of the data acquisition devices and each of the VAV terminal dampers is located in each air supply room; the air volume distribution device is applied to the air volume distribution method of the air conditioning system as described in any one of claims 1 to 3.

6. A computer terminal device, characterized in that, The system includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein the processor executes the computer program to implement an air volume control method for an air conditioning system as described in any one of claims 1 to 3.

7. A computer-readable storage medium, characterized in that, The computer-readable storage medium includes a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to perform an air volume control method for an air conditioning system as described in any one of claims 1 to 3.

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