A method for cooperative control of a rooftop air conditioner

Abstract

The present application relates to the technical field of cooperative control, in particular to a kind of roof air conditioner's cooperative control method, comprising the following steps, based on central cooperative controller collection temperature and pressure feedback and determine link continuous state, form temperature and pressure correlation data, in turn demarcate hot side regulation level, air flow intervention grade and shunt lock grade, again combined with communication confirmation and action holding state arrangement execution order, obtain cooperative execution sequence.The present application is by gathering temperature and pressure feedback and verifying link continuous state according to control cycle, convert heat exchange pressure state into layered regulation basis, then by air flow side pressure deviation and air supply demand determine fan regulation insertion position, then the shunt circuit occupation state is included in action intervention order, communication confirmation and action holding constraint are introduced before command sending, make heat exchange regulation, air flow compensation and circuit switching be connected in proper order, solve instruction conflict and switching out of order problem.

Description

Technical Field

[0001] This invention relates to the field of collaborative control technology, and in particular to a collaborative control method for rooftop air conditioning. Background Technology

[0002] The field of collaborative control technology involves the coordinated management of multiple controlled objects, control units, actuators, and detection components. It primarily revolves around status acquisition, information transmission, control command allocation, parameter adjustment, and equipment linkage, and is widely applied in industries such as new energy manufacturing, biomedicine, electronics manufacturing, hospital cleanrooms, and smart agriculture. Traditional rooftop air conditioning collaborative control methods refer to the methods used for air conditioning units installed on building roofs. These methods involve acquiring the operating status of compressors, fans, heat exchangers, valves, sensors, and controllers, generating control commands, adjusting operating parameters, and managing operating condition switching. They typically employ sensor detection, communication connections, control logic, feedback regulation, and equipment linkage technologies to coordinate and manage multiple operational aspects of the rooftop air conditioning unit.

[0003] Traditional rooftop air conditioning collaborative control often generates commands in a decentralized manner based on individual operating links. Compressor frequency, valve opening, fan speed, air supply angle, and loop switching each respond to sensor feedback independently. The timing of data acquisition and communication confirmation lack unified constraints. Changes in heat exchanger pressure fail to constrain the airflow compensation sequence in a timely manner. Loop switching occupancy status is also prone to overlap with fan regulation. The control sequence fluctuates with changes in local feedback. In actual operation, command insertion conflicts are likely to occur, actuator waiting time is prolonged, and the switching of energy-saving operation segments is unstable. Summary of the Invention

[0004] To address the technical problems existing in the prior art, this invention provides a collaborative control method for rooftop air conditioning. The technical solution is as follows: On the one hand, a method for coordinated control of rooftop air conditioning is provided, including the following steps: S1: Based on the central collaborative controller, the target supply air temperature and return air temperature are collected according to the control cycle, the static pressure of the air duct is verified at the time, and the continuity of the feedback is identified by combining the condensing pressure and evaporating pressure link to obtain temperature and pressure correlation data. S2: Based on the temperature and pressure correlation data, the condensing pressure is classified into the heat exchange side pressure state. Combining the evaporation pressure and the direction of compressor frequency change, the valve group correction sequence is determined according to the opening degree of the electronic expansion valve to obtain the heat side regulation level. S3: Based on the aforementioned heat-side adjustment level, the static pressure of the air duct is classified into the airflow-side pressure deviation range. The air supply volume guarantee status is checked according to the target indoor pressure. The fan adjustment insertion position is selected according to the air quality level to obtain the airflow intervention level. S4: Based on the airflow intervention level, identify the current position of the variable flow splitting heat exchange loop, check the switching direction according to the target flow splitting position, lock the flow splitting action intervention sequence according to the loop switching occupancy position, and obtain the flow splitting locking level; S5: Based on the aforementioned diversion locking level, the communication confirmation status of the actuator control board is placed into the command link, the outdoor fan action is maintained, the current position of the air supply angle is checked, and the order of sending each execution action is arranged to obtain the coordinated execution sequence.

[0005] On the other hand, the temperature and pressure correlation data includes supply and return air temperature difference, static pressure timescale offset, and refrigerant pressure ratio; the heat-side regulation level includes condensing load rate, evaporating load rate, and valve frequency coupling coefficient; the airflow intervention level includes indoor pressure difference, supply air margin, and ventilation demand level; the diversion lock-in level includes diversion position deviation, switching duty cycle, and loop lock-in priority; and the cooperative execution sequence includes communication handshake flag, execution hold sequence, and action priority.

[0006] On the other hand, the specific steps for obtaining the temperature-pressure correlation data are as follows: S101: Based on the central collaborative controller, analyze the received target supply air temperature and roof air conditioning unit return air temperature, compare the control cycle to which the two temperature sampling identifiers belong, calculate the temperature difference record formed by the return air hot state and the supply air target, determine the temperature consistency state, and obtain the temperature difference cycle index. S102: Based on the temperature difference cycle index, analyze the sampling time of the duct static pressure feedback within the control cycle, compare the sampling time with the start and end range of the control cycle, adjust the static pressure feedback attribution flag, determine the connection status between the static pressure time scale and the temperature time scale, and obtain the static pressure time scale offset status. S103: Based on the static pressure timescale offset state, analyze the condensing pressure feedback link identifier and the evaporating pressure feedback link identifier, compare the connection state of the pressure feedback link and the static pressure feedback timescale in the same period, determine the sensor feedback interruption state, and obtain temperature and pressure correlation data.

[0007] On the other hand, the specific steps for obtaining the thermal adjustment level are as follows: S201: Based on the temperature and pressure correlation data, analyze the periodicity of the condensing pressure sensor feedback and the evaporating pressure feedback, compare the connection status of the condensing side link identifier and the evaporating side link identifier, determine the correspondence between the exhaust side load direction and the heat absorption state, and obtain the heat exchange side pressure state. S202: Based on the heat exchange side pressure state, analyze the direction of change of evaporation pressure feedback, compare the direction of change of compressor frequency inverter driver operating frequency, determine the arrangement relationship between frequency up-adjustment state, frequency down-adjustment state, frequency holding state and heat absorption state of evaporation heat exchange side, and obtain the pressure-frequency linkage state. S203: Based on the aforementioned pressure-frequency linkage state, analyze the valve group opening of the electronic expansion valve driver, compare the valve group opening adjustment direction with the compressor operating frequency change direction, determine the sending position of the valve group correction action and the compressor frequency action, and obtain the hot-side adjustment level.

[0008] On the other hand, the steps for obtaining the airflow intervention level are as follows: S301: Based on the hot-side adjustment level, detect the time of the duct static pressure feedback, analyze the control cycle to which the duct static pressure feedback belongs, compare the control cycle with the hot-side action arrangement cycle, determine the direction of deviation between the duct static pressure and the target indoor pressure, and obtain the airflow pressure difference status. S302: Based on the airflow pressure difference status, obtain the target indoor pressure and the current air supply volume, analyze the air supply status corresponding to the indoor pressure difference, compare the current air supply volume with the air quality level air supply requirements, determine the air supply volume guarantee status, calculate the ventilation demand level, and obtain the air supply guarantee verification status. S303: Based on the air supply guarantee verification status, detect the candidate positions for fan frequency adjustment, analyze the air supply guarantee status and the action sequence of the heat-side adjustment level, compare the fan adjustment position with the heat exchange side action position, screen the fan frequency adjustment insertion position, and obtain the airflow intervention level.

[0009] On the other hand, the specific steps for obtaining the traffic diversion locking level are as follows: S401: Based on the airflow intervention level, detect the current position of the variable flow splitting heat exchange loop, check the adjustment requirements of the loop branch to which the current position belongs and the airflow intervention level, compare the channel sequence relationship between the current position and the target flow splitting position, determine the direction of flow splitting position deviation, and obtain the flow splitting position deviation status. S402: Based on the diversion position deviation state, compare the switching path between the current position and the target diversion position, determine the action connection relationship between the loop switching direction and the airflow intervention level, mark the loop switching occupancy position according to the switching direction, and obtain the switching occupancy determination state; S403: Based on the switching occupancy determination status, check the switching channel occupancy status, compare the correspondence between the occupancy status and the deviation direction of the diversion position, determine the intervention sequence of the diversion loop switching action, and obtain the diversion locking level.

[0010] On the other hand, the steps for obtaining the cooperative execution sequence are as follows: S501: Based on the diversion locking level, obtain the communication confirmation status of the actuator control board, compare the communication confirmation message return period with the command sending link period, determine the correspondence between the return identifier and the loop locking priority, adjust the command link access order, and obtain the communication handshake flag. S502: Based on the communication handshake flag, monitor the outdoor fan driver's action holding status, compare the fan holding feedback with the current position of the air supply angle actuator, determine the correspondence between the current position of the air supply angle and the correction direction, arrange the holding action and the angle correction action, and obtain the execution holding timing sequence. S503: Based on the execution holding timing, compare the transmission relationship between the loop switching action and the valve group correction action, determine the access position of the fan adjustment action and the air supply angle correction action, adjust the order of action transmission, and obtain the coordinated execution sequence.

[0011] On the other hand, the target supply air temperature refers to the supply air side temperature setpoint received by the central coordinating controller, which represents the control target of the roof air conditioning unit's air outlet side, and the return air temperature refers to the air temperature detected at the return air inlet of the roof air conditioning unit, which represents the thermal state of the building space air when it returns to the unit.

[0012] On the other hand, the duct static pressure refers to the pressure feedback inside the air supply duct detected by the static pressure sensor, which is used to characterize the duct resistance and air supply pressure status. The heat exchange side pressure status refers to the refrigerant heat exchange load status formed by the feedback from the condensing pressure sensor and the evaporating pressure sensor.

[0013] On the other hand, the frequency change direction refers to the frequency change trend of the compressor inverter driver within the control cycle, indicating that the compressor is in a state of frequency increase, frequency decrease or maintenance. The airflow side pressure deviation range refers to the pressure deviation range formed between the duct static pressure and the target indoor pressure.

[0014] The beneficial effects of the technical solutions provided in the embodiments of the present invention include at least the following: By collecting temperature and pressure feedback according to the control cycle and verifying the continuous status of the link, the heat exchange pressure status is transformed into a stratified adjustment basis. Then, the fan adjustment insertion position is determined by the airflow side pressure deviation and air supply demand. Subsequently, the occupancy status of the diversion loop is included in the action intervention sequence. Communication confirmation and action holding constraints are introduced before the command is sent, forming a continuous chain from temperature and pressure correlation, heat side constraints, airflow intervention, diversion locking to coordinated execution. This ensures that heat exchange regulation, airflow compensation and loop switching are connected in sequence, solving the problems of command conflict and switching disorder. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a flowchart of the main steps of the present invention; Figure 2 This is a flowchart of steps S1 of the present invention; Figure 3 This is a flowchart of steps S2 of the present invention; Figure 4 This is a flowchart of steps S3 of the present invention; Figure 5 This is a flowchart of step S4 of the present invention; Figure 6 This is a flowchart of steps S5 of the present invention. Detailed Implementation

[0017] The technical solution of the present invention will now be described with reference to the accompanying drawings.

[0018] To make the technical problems, technical solutions and advantages of the present invention clearer, a detailed description will be given below in conjunction with the accompanying drawings and specific embodiments.

[0019] This invention provides a method for the coordinated control of rooftop air conditioning, such as... Figure 1 As shown, it includes the following steps: S1: Based on the central collaborative controller, the target supply air temperature and the return air temperature of the roof air conditioning unit are collected according to the control cycle, the time of the duct static pressure feedback is verified, the link identifiers of the condensing pressure feedback and evaporating pressure feedback are analyzed, the continuous status of the sensor link is determined, and temperature and pressure correlation data are obtained. S2: Based on temperature and pressure correlation data, the feedback from the condensing pressure sensor is marked as the heat exchange side pressure status. The direction of change of the evaporating pressure feedback and the operating frequency of the compressor inverter driver is analyzed. The correction sequence is determined according to the valve group opening degree of the electronic expansion valve driver to obtain the heat side adjustment level. S3: Based on the heat-side adjustment level, the static pressure feedback of the air duct is classified into the airflow-side pressure deviation range. The air supply volume guarantee status is checked according to the target indoor pressure. Based on the air quality level air supply requirements, the fan frequency adjustment insertion position is selected to obtain the airflow intervention level. S4: Based on the airflow intervention level, identify the current position of the variable flow splitting heat exchange loop, check the loop switching direction according to the target flow splitting position, determine the switching channel occupancy status according to the loop switching occupancy position, and then lock the intervention sequence of the flow splitting loop switching action to obtain the flow splitting lock level. S5: Based on the diversion locking level, the communication confirmation status of the actuator control board is placed into the command sending link, the outdoor fan driver action holding status is maintained, the current position of the air supply angle actuator is checked, and the action sending order is arranged according to the loop switching occupancy status to obtain the coordinated execution sequence.

[0020] Temperature and pressure correlation data include supply and return air temperature difference, static pressure timescale offset, and refrigerant pressure ratio; heat-side regulation levels include condensing load rate, evaporating load rate, and valve frequency coupling coefficient; airflow intervention levels include indoor pressure difference, supply air margin, and ventilation demand level; diversion lock-in levels include diversion position deviation, switching duty cycle, and loop lock-in priority; and collaborative execution sequence includes communication handshake flag, execution hold sequence, and action priority.

[0021] In S1, the target supply air temperature refers to the supply air side temperature setpoint received by the central coordinating controller, used to characterize the control target on the supply air side of the roof air conditioning unit; the return air temperature refers to the air temperature detected at the return air inlet of the roof air conditioning unit, used to characterize the thermal state of the air returning to the unit from the building space; the duct static pressure feedback refers to the pressure feedback within the supply air duct detected by the static pressure sensor, used to characterize the duct resistance and supply air pressure state; the condensing pressure feedback refers to the refrigerant condensing side pressure feedback detected by the condensing pressure sensor, used to characterize the load on the compressor discharge side and the condensing heat exchange side; the evaporating pressure feedback refers to the refrigerant evaporating side pressure feedback detected by the evaporating pressure sensor, used to characterize the heat absorption state on the evaporating heat exchange side; the sensor link continuity status refers to the connection status, signal identification status, and feedback interruption status of the target supply air temperature, return air temperature, duct static pressure feedback, condensing pressure feedback, and evaporating pressure feedback within the same control cycle.

[0022] In S2, the heat exchange side pressure state refers to the refrigerant heat exchange load state formed by the feedback from the condensing pressure sensor and the evaporating pressure sensor; the direction of operating frequency change refers to the frequency change trend of the compressor inverter driver within the control cycle, characterizing whether the compressor is in a frequency increase, frequency decrease, or holding state; the valve group opening degree refers to the state quantity of the electronic expansion valve driver controlling the degree of valve core opening, used to characterize the refrigerant flow adjustment range; the correction sequence refers to the arrangement order of the electronic expansion valve opening correction action in the heat exchange side control command, used to distinguish the order of valve group correction action and compressor frequency action.

[0023] In S3, the airflow-side pressure deviation range refers to the pressure deviation range formed between the duct static pressure and the target indoor pressure, used to mark the airflow-side pressure adjustment level; the target indoor pressure refers to the indoor pressure target set by the central coordinating controller, used as the benchmark for duct static pressure and air supply status verification; the air supply volume guarantee status refers to the current air supply volume relative to the air quality level air supply requirements; the air supply requirements refer to the ventilation requirements determined by the air quality level, usually corresponding to the minimum air supply volume or fresh air volume requirement; the adjustment insertion position refers to the arrangement position of the fan frequency adjustment command in the coordinating control command sequence.

[0024] In S4, the variable split heat exchange loop refers to the heat exchange loop structure in the roof air conditioning unit that can change the refrigerant flow direction or the location of the heat exchange branch; the loop switching direction refers to the direction of action formed when the current split loop position is switched to the target split position; the switching channel occupancy status refers to the channel status of the split loop performing switching, waiting for confirmation, or being allowed to receive switching commands; the switching action intervention sequence refers to the order in which the split loop switching actions are arranged in the coordinated control command sequence.

[0025] In S5, the actuator control board refers to the control board that connects the compressor frequency converter driver, electronic expansion valve driver, outdoor fan driver, air supply angle actuator, and diversion loop actuator; the command sending link refers to the communication path through which the central coordinating controller sends control commands to the actuator control board and receives communication confirmation status; the action holding state refers to the state in which the outdoor fan driver maintains its action after receiving the adjustment command; the air supply angle actuator refers to the actuator that adjusts the air supply louvers, air supply guide vanes, or air supply angle components; the action sending sequence refers to the order in which the loop switching action, valve group correction action, fan adjustment action, and air supply angle correction action are arranged in the coordinating execution sequence.

[0026] like Figure 2 As shown, the specific steps for obtaining temperature-pressure correlation data are as follows: S101: Based on the central collaborative controller, analyze the received target supply air temperature and roof air conditioning unit return air temperature, compare the control cycle to which the two temperature sampling identifiers belong, calculate the temperature difference record formed by the return air hot state relative to the supply air target, determine the temperature unit consistency state, and obtain the temperature difference cycle index. The central coordinating controller first reads the supply air side setting record and the return air side detection record, extracting the unit affiliation, sampling identifier, sampling batch, temperature unit, and set reading from the supply air side record; then it extracts the same information from the return air side record. Next, it verifies the unit affiliation in the supply and return air side records. If the affiliation information points to the same rooftop air conditioning unit, both sets of records are placed in the same processing queue. Then, it compares the sampling batches. If the supply air side sampling batch and the return air side sampling batch fall within the same control cycle, the two sets of temperature records are registered as pairable. If one set of records is lagging or preceding the other, the record is transferred to the candidate queue for the adjacent cycle and processed according to the sampling identifier, sampling batch, and unit affiliation. The data is then re-archived; next, the temperature unit markings are checked. If the units match, the temperature reading is read directly; if the units do not match, they are first rewritten to the same unit. In cooling and supply air mode, the controller subtracts the return air side reading from the supply air side reading to obtain the deviation record of the return air hot state relative to the supply air target. Based on the deviation direction, deviation magnitude, and continuous cycle change trend, the dynamic priority of the temperature side is calculated, so that the supply air temperature stability control request is given priority to enter the subsequent collaborative judgment. If the return air side reading is higher than the supply air side reading, it is recorded as a positive temperature difference; if it is lower than the supply air side reading, it is recorded as a reverse temperature difference; if they are the same, it is recorded as a temperature difference without deviation. Finally, the control cycle mark, unit affiliation, sampling identifier, unit verification status, temperature difference deviation record, and temperature side dynamic priority are merged and registered to obtain the temperature difference cycle index.

[0027] S102: Based on the temperature difference cycle index, analyze the sampling time of the duct static pressure feedback within the control cycle, compare the sampling time with the start and end range of the control cycle, adjust the static pressure feedback attribution flag, determine the connection status between the static pressure time scale and the temperature time scale, and obtain the static pressure time scale offset status. After the temperature difference cycle index is formed, the control cycle marker, supply air side sampling identifier, return air side sampling identifier, temperature difference deviation record, and temperature-side dynamic priority pointed to by the index are obtained. Then, the feedback record reported by the duct static pressure sensor is retrieved, and the static pressure sampling identifier, static pressure feedback reading, duct assignment, sampling time marker, and original cycle assignment are extracted. Subsequently, the duct assignment is checked against the supply air duct registration information of the roof air conditioning unit. If the assignments match, the cycle check is initiated; if the assignments do not match, the record is transferred to the abnormal record queue. During the cycle check, the controller compares the static pressure sampling time marker between the start and end boundaries of the current control cycle. If the static pressure sampling marker falls within the range of the control cycle, the original assignment marker is retained; if it is close to the end of the previous control cycle, it is listed as a candidate feedback. If it is close to the start of the next control cycle, it is listed as a candidate feedback to be moved backward. For candidate feedback to be moved forward and candidate feedback to be moved backward, the controller continues to compare its order with the temperature sampling identifier. When the static pressure feedback and temperature sampling can be connected in the adjacent sampling sequence, the static pressure feedback is reattached to the corresponding temperature difference cycle index. During the air supply process, if the static pressure of the air duct deviates from the target static pressure range, the controller generates airflow compensation candidate levels based on the static pressure deviation, the air supply temperature deviation, and the air supply volume guarantee status. However, before the pressure on the heat exchange side is stable, the fan frequency change is not directly triggered to form a sequential constraint between airflow compensation and heat exchange regulation. Then, the static pressure feedback status, sampling order, offset direction, connection conclusion, and static pressure stability requirements are written into the index record to obtain the static pressure time scale offset status.

[0028] S103: Based on the static pressure timescale offset state, analyze the condensing pressure feedback link identifier and the evaporating pressure feedback link identifier, compare the connection state of the pressure feedback link and the static pressure feedback timescale in the same period, determine the sensor feedback interruption state, and obtain temperature and pressure correlation data. After obtaining the static pressure timescale offset status, the unit affiliation, duct affiliation, static pressure sampling identifier, static pressure affiliation mark, and offset direction in that status are acquired. Then, the refrigerant-side pressure feedback cache is retrieved, and the condenser-side pressure feedback record and evaporator-side pressure feedback record are extracted separately. The link identifier, sensor affiliation, feedback batch, pressure reading, communication confirmation flag, and feedback update flag are extracted. Subsequently, the affiliation of the condenser-side link identifier and the evaporator-side link identifier is checked to confirm that they both point to the refrigerant heat exchange circuit of the same rooftop air conditioning unit. Next, the control cycle relationship between the pressure feedback batch and the static pressure feedback affiliation mark is compared. If the condenser-side pressure feedback, evaporator-side pressure feedback, and static pressure feedback fall within the same control cycle association range, they are registered as pressure and static pressure being linked in the same cycle. If the pressure feedback batch is ahead or behind, it is transferred to the candidate association record according to the feedback update flag. Then, the communication confirmation flag and feedback update flag are checked. When the link continuously returns confirmation and generates... When new feedback is generated, it is registered as continuous link. When communication confirmation exists but no new feedback occurs, it is registered as feedback stalled. When communication confirmation is missing and the feedback batch is not updated, it is registered as feedback interrupted. Among them, the execution actions corresponding to feedback stalled or feedback interrupted are not included in the immediate sending sequence. Instead, according to the action postponement rule when communication confirmation fails or is delayed, the relevant heat exchange adjustment, valve group opening correction, and diversion loop switching requests are temporarily listed as postponed actions. At the same time, the controller forms a heat exchange side pressure stability judgment based on condenser side pressure deviation, evaporator side pressure deviation, static pressure stability requirements, and temperature difference dynamic priority. This provides a correlation basis for subsequent fan frequency and valve group opening coordination, diversion heat exchange loop stable switching, multi-execution action conflict resolution, and reduction of operating condition switching energy consumption and fluctuation. Finally, the temperature difference deviation record, static pressure deviation status, condenser side pressure link status, evaporator side pressure link status, communication delay status, and feedback interruption status are summarized to obtain temperature and pressure correlation data.

[0029] like Figure 3 As shown, the specific steps for obtaining the thermal adjustment level are as follows: S201: Based on temperature and pressure correlation data, analyze the periodicity of the condensing pressure sensor feedback and the evaporating pressure feedback, compare the connection status of the condensing side link identifier and the evaporating side link identifier, determine the correspondence between the exhaust side load direction and the heat absorption state, and obtain the heat exchange side pressure state. Retrieve the temperature difference records, static pressure offset status, condenser-side pressure feedback records, and evaporator-side pressure feedback records that have completed the cycle adjustment; then read the link identifier, feedback batch, pressure reading, communication confirmation status, and update status from the condenser-side pressure feedback, and then read the link identifier, feedback batch, pressure reading, communication confirmation status, and update status from the evaporator-side pressure feedback; the controller first checks whether the condenser-side link and the evaporator-side link point to the refrigerant circuit of the same rooftop air conditioning unit. If their attribution information is consistent, they are placed in the same heat exchange side record; if their attribution information is inconsistent, the mismatched record is transferred to the waiting-for-review queue; then compare the cycle attribution of the condenser-side feedback batch, the evaporator-side feedback batch, and the temperature-pressure correlation data. When both fall within the same cycle correlation range, it is registered as pressure feedback of the same cycle; when one of the feedbacks is lagging, stuck in an old batch, or has a delayed communication confirmation, it is registered as pressure link asynchrony, and the corresponding adjustment action is added to the candidate for relocation; in practice In actual operation scenarios, when the compressor discharge side load increases, the condenser side pressure feedback usually rises, while when the evaporator heat exchange side has insufficient heat absorption, the evaporator side pressure feedback usually falls. Based on this, the controller pairs the direction of change of the condenser side reading with the direction of change of the evaporator side reading. If the condenser side pressure rises and the evaporator side pressure falls, it is recorded as a heavy discharge side load and a weak heat absorption side. If both the condenser and evaporator sides are stable, it is recorded as a balanced heat exchange side pressure. If the condenser side pressure falls and the evaporator side pressure rises, it is recorded as a decrease in the discharge side load and an increase in the heat absorption side pressure. At the same time, the dynamic priority of the heat exchange side is calculated based on the deviation of the supply air temperature, the deviation of the duct static pressure, the deviation of the condenser side pressure, and the deviation of the evaporator side pressure, so that the heat exchange side pressure stabilization request and the supply air temperature stabilization request are placed in the same sorting rule. Finally, the cycle assignment, link connection status, pressure change direction, dynamic priority, and the correspondence between the discharge side and the heat absorption side are written into the heat exchange side record to obtain the heat exchange side pressure status.

[0030] S202: Based on the pressure state on the heat exchange side, analyze the direction of change in evaporation pressure feedback, compare the direction of change in the operating frequency of the compressor inverter driver, determine the arrangement relationship between the frequency up-adjustment state, frequency down-adjustment state, frequency hold state and the heat absorption state on the evaporation heat exchange side, and obtain the pressure-frequency linkage state. The controller acquires the current feedback, last valid feedback, feedback update status, and absorber side status flag of the evaporator side pressure. It then reads the current operating frequency, last operating frequency, frequency command source, frequency hold flag, and driver feedback confirmation status of the compressor inverter driver. The controller first compares the current evaporator side pressure feedback with the last valid feedback. When the current feedback shifts upward relative to the last feedback, it registers an upward movement of the evaporator side pressure; when the current feedback shifts downward relative to the last feedback, it registers a downward movement of the evaporator side pressure; if no identifiable change is formed between the current and subsequent feedback, it registers a stable evaporator side pressure. Next, it compares the current compressor operating frequency with the last operating frequency. When the current operating frequency shifts upward relative to the last operating frequency, it registers a frequency increase; when the current operating frequency shifts downward relative to the last operating frequency, it registers a frequency decrease; if the driver feedback shows no adjustment, it registers a frequency hold. When the rooftop air conditioner is in cooling mode, if the evaporator side pressure decreases and the frequency continues to increase, the controller registers this relationship as an insufficient absorber side load. The controller adjusts the pressure and frequency simultaneously to reduce energy consumption and fluctuations during operation switching. If the evaporator pressure increases and the frequency decreases, it is recorded as a simultaneous increase in the heat exchanger load and a decrease in the compressor output. If the evaporator pressure is stable and the frequency is maintained, it is recorded as a stable arrangement of the heat exchanger and compressor output. When the direction of change of evaporator pressure and the direction of change of frequency are mutually constrained, the controller further reads the condenser load mark in the heat exchanger pressure status and determines whether airflow compensation is allowed to intervene in advance based on the static pressure stability requirements of the air duct. Airflow compensation is only inserted when the heat exchanger pressure is not in a rapid deviation state. If the heat exchanger pressure is still in the process of rising or falling, the compressor frequency constraint or valve opening constraint is completed first, and then the fan side compensation is executed. Finally, the direction of change of evaporator pressure, direction of change of compressor frequency, frequency adjustment status, airflow compensation sequence constraint and heat exchanger arrangement relationship are merged and registered to obtain the pressure-frequency linkage status.

[0031] S203: Based on the pressure-frequency linkage state, analyze the valve group opening of the electronic expansion valve driver, compare the valve group opening adjustment direction with the compressor operating frequency change direction, determine the sending position of the valve group correction action relative to the compressor frequency action, and obtain the hot side adjustment level. The controller acquires feedback from the electronic expansion valve actuator regarding the valve group opening degree, previous opening degree, opening command source, valve group action confirmation status, and valve core positioning status. It then reads the compressor inverter actuator's frequency change direction, frequency command confirmation status, and frequency action hold status. The controller first compares the current valve group opening degree with the previous opening degree. When the current opening degree increases relative to the previous opening degree, it is recorded as the valve group opening widens; when the current opening degree decreases relative to the previous opening degree, it is recorded as the valve group closing narrows; when the valve core positioning status remains unchanged, it is recorded as the valve group holding. Subsequently, the valve group opening adjustment direction is paired with the compressor operating frequency change direction. If the compressor frequency increases and the valve group opens wide, it is recorded as flow regulation following the increase in compressor output. If the compressor frequency increases and the valve group closes narrows, it is recorded as valve group correction opposite to frequency action. If the compressor frequency decreases and the valve group closes narrows, it is recorded as flow regulation following the decrease in compressor output. If the compressor frequency holds but the valve group continues to adjust, it is recorded as valve group individual correction. In actual rooftop air conditioning control, when the compressor frequency changes... If it is confirmed that the evaporator-side pressure has not yet returned to a stable range, the controller will send the valve group correction action after the frequency action. When the evaporator-side pressure change direction is registered as downward and the valve group opening status is registered as closed or held, the controller will send the valve group correction action before the compressor frequency action. When the compressor frequency is held and the valve core is not in position, the controller will send the valve group action as a continuation action. If there is a failure or delay in the frequency command confirmation status, valve group action confirmation status, or communication confirmation status, the execution item will be suspended according to the action postponement rule, and the previous stable frequency or the previous stable opening will be maintained. If there is competition in the same cycle between frequency adjustment, valve group opening adjustment, fan frequency compensation, and diversion loop switching, the heat exchanger-side pressure stability and supply air temperature stability will be processed first according to dynamic priority, followed by the duct static pressure stability and airflow compensation, and mutually exclusive actions will be split into adjacent sending windows. Finally, the valve group opening direction, frequency change direction, action confirmation status, conflict resolution results, and valve group correction sending position will be merged and arranged to obtain the heat-side regulation level.

[0032] like Figure 4 As shown, the specific steps for obtaining the airflow intervention level are as follows: S301: Based on the hot-side adjustment level, detect the time of the duct static pressure feedback, analyze the control cycle to which the duct static pressure feedback belongs, compare the control cycle with the hot-side action arrangement cycle, determine the direction of the duct static pressure deviation relative to the target indoor pressure, and obtain the airflow pressure difference status. The system acquires the compressor's operating status, valve group correction status, heat exchanger side pressure status, and operating cycle from the heat-side action sequence record. Then, it retrieves the duct static pressure feedback record, extracting the duct assignment, sampling identifier, feedback reading, original assignment cycle, and feedback update status. The controller first checks if the duct assignment points to the current rooftop air conditioning unit's supply air duct. If the assignments match, the static pressure feedback is placed in the airflow side pending judgment record; otherwise, it is registered as a non-unit duct record. Next, the original assignment cycle of the static pressure feedback is compared with the heat-side action sequence cycle. When both are within the same control sequence range, the duct static pressure feedback is linked to the heat-side action record. When the static pressure feedback falls before the heat-side action, it is registered as preceding airflow feedback; when it falls after the heat-side action, it is registered as subsequent airflow feedback. In actual rooftop air conditioning operation, after the compressor frequency increases or the valve group opens wider… The airflow resistance on the supply air side may change with the state of the heat exchanger. The controller continues to read the target indoor pressure setting record and compares the duct static pressure feedback with the target indoor pressure. When the duct static pressure is greater than the target indoor pressure, it is recorded as a positive pressure deviation; when the duct static pressure is less than the target indoor pressure, it is recorded as a reverse pressure deviation; when both are within the same judgment range, it is recorded as pressure fit. At the same time, based on the static pressure deviation, the stable state of the heat exchanger side pressure, and whether the hot side action has been completed, the dynamic priority of the airflow side is calculated. If the heat exchanger side pressure is still in a rapid deviation process, the airflow compensation is registered as a subsequent constraint action. If the static pressure deviation continues to expand and the supply air temperature does not show reverse fluctuations, the airflow compensation is allowed to enter the preliminary candidate. Finally, the static pressure feedback attribution, the hot side action cycle relationship, the pressure deviation direction, the dynamic priority, and the airflow side connection status are combined and recorded to obtain the airflow pressure difference attribution status.

[0033] S302: Based on the airflow pressure difference status, obtain the target indoor pressure and the current air supply volume, analyze the air supply status corresponding to the indoor pressure difference, compare the current air supply volume with the air quality level air supply requirements, determine the air supply volume guarantee status, calculate the ventilation demand level, and obtain the air supply guarantee verification status. The system acquires the target indoor pressure setting record, current air volume feedback, air volume sampling identifier, air quality level label, and fan operation feedback. It then reads the deviation direction of the duct static pressure relative to the target indoor pressure from the registered airflow pressure difference status, and maps this deviation direction to the current air volume feedback. If the airflow side shows a positive pressure deviation, the air supply status is registered as "strong air supply"; if the airflow side shows a reverse pressure deviation, the air supply status is registered as "insufficient air supply"; if the airflow side shows pressure matching, the air supply status is registered as "balanced air supply". Next, it reads the air quality level air supply requirements. "Clean" corresponds to the basic air supply requirement, "normal" corresponds to the regular air supply requirement, and "turbid" corresponds to the enhanced air supply requirement. The controller compares the current air volume with the corresponding air supply requirement. When the current air volume reaches or exceeds the requirement, it is registered as "air supply satisfied"; when the current air volume is lower than the requirement, it is registered as "air supply insufficient"; when the current air volume is lower than the adjacent sampling record... If some parts of the record meet the air supply requirements while others fall below them, or if the air quality level has just switched but the corresponding air supply feedback has not yet been updated, it is recorded as air supply awaiting compensation. In the scenario of air conditioning operation on a shopping mall rooftop, if human activity causes the air quality label to change from clean to normal, the controller will switch the air supply requirements from the basic state to the normal state, and then compare the current air supply feedback with the normal requirements. Subsequently, the ventilation demand levels are arranged according to the direction of pressure deviation, air quality level, air supply sufficiency, and stable air supply temperature. Clean and sufficient air supply is recorded as the basic level, normal and air supply awaiting compensation is recorded as the transitional level, and turbid and insufficient air supply is recorded as the enhanced level. If the air supply is insufficient but the static pressure has deviated positively, the fan frequency is restricted from being directly increased, and priority is given to waiting for the valve opening or the heat exchange side pressure to be corrected to avoid air supply overshoot and increased energy consumption. Finally, the corresponding state of indoor pressure difference, air supply sufficiency, duct static pressure stability requirements, and ventilation demand levels are combined to obtain the air supply guarantee verification state.

[0034] S303: Based on the air supply guarantee verification status, detect the candidate positions for fan frequency adjustment, analyze the air supply guarantee status and the action sequence of the heat-side adjustment level, compare the fan adjustment position with the heat exchange side action position, screen the fan frequency adjustment insertion position, and obtain the airflow intervention level. The system acquires candidate records for fan frequency adjustment, extracting the candidate insertion position, current fan operating status, fan action confirmation status, air supply volume guarantee status, and ventilation demand level. Then, it retrieves the compressor action sequence, valve group correction sequence, heat exchanger pressure status, and pressure-frequency linkage status from the heat-side adjustment hierarchy. The controller first determines the air supply guarantee status. If the current air supply volume meets the air supply requirements, the fan adjustment candidate position is registered as a subsequent candidate. If the current air supply volume is in a state of pending compensation, the fan adjustment candidate position is registered as an intermediate candidate. If the current air supply volume is insufficient and the air quality corresponds to a strengthened air supply requirement, the fan adjustment candidate position is registered as a preceding candidate. Next, the system compares the fan adjustment candidate position with the heat exchanger action position. When the heat-side action is not yet confirmed and the air supply guarantee status is registered as air supply satisfied, the fan adjustment is placed after the heat exchanger action. When the air supply guarantee status is registered as air supply pending compensation, the fan adjustment is placed after the heat-side action confirmation. When airflow is insufficient, the fan adjustment is placed in the preliminary candidate position. When air supply is insufficient and indoor pressure is deviating in the opposite direction, the fan adjustment is placed before valve group correction or after compressor operation. When the compressor frequency is increasing and the fan also needs to increase air supply, the controller checks the fan operation confirmation status and registers the insertion position only after confirming that the command can be received. If the fan operation confirmation fails, communication confirmation is delayed, or the fan frequency feedback is not updated, the fan adjustment is moved to the next sending window according to the action postponement rule, and the previous stable frequency is maintained. If the fan frequency increase, valve group opening, and compressor frequency increase are requested simultaneously in the same cycle, the conflict resolution rule is followed to prioritize the stability of heat exchange side pressure and air supply temperature, and then the duct static pressure stability and airflow compensation are executed. Mutually exclusive actions are split and sent to reduce energy consumption and fluctuations during the operation switching process. Finally, the fan candidate position, air supply guarantee status, heat side action sequence, conflict resolution result, and insertion judgment result are combined to obtain the airflow intervention level.

[0035] like Figure 5 As shown, the specific steps for obtaining the traffic lock level are as follows: S401: Based on the airflow intervention level, detect the current position of the variable flow splitting heat exchange loop, check the adjustment requirements of the loop branch to which the current position belongs and the airflow intervention level, compare the channel sequence relationship between the current position and the target flow splitting position, determine the direction of flow splitting position deviation, and obtain the flow splitting position deviation status. The system acquires the established intervention markers on the airflow side, extracting the air supply guarantee status, fan adjustment insertion position, indoor pressure deviation direction, and ventilation demand level. Then, it retrieves the current position feedback from the variable flow splitting heat exchange loop, reading the current position name, branch marker, action confirmation, loop lockout flag, and last switching record returned by the splitting execution component. The controller first checks if the current position feedback originates from the heat exchange loop of the current rooftop air conditioning unit. If the loop affiliation matches the unit affiliation, the current position is included in the splitting judgment; otherwise, the feedback is transferred to the pending verification record. Next, it compares the branch to which the current position belongs with the adjustment requirements corresponding to the airflow intervention level. If the airflow intervention level indicates that the air supply side needs strengthening, it prioritizes checking if the current position is in a strengthened heat exchange branch. If the current position is still in a regular heat exchange branch or bypass branch, it is registered as the current position and airflow... If the adjustment requirements are inconsistent, and the airflow intervention level indicates that the supply air side is in balance, check whether the current position is in a conventional heat exchange branch. If the airflow intervention level indicates that the fan adjustment should be postponed, check whether the current position is in a branch that does not require immediate switching. At the same time, the controller calculates the dynamic priority of diversion switching based on the supply air temperature deviation, duct static pressure deviation, heat exchange side pressure stability, and ventilation demand level to avoid directly triggering branch switching when the supply air temperature, duct static pressure, or heat exchange side pressure are still fluctuating drastically. Then, the current position is compared with the target diversion position in terms of channel sequence. If the current position is before the target position, it is registered as forward deviation; if it is after the target position, it is registered as backward deviation; if it is the same as the target position, it is registered as no deviation. Finally, the current position, branch demand correspondence, channel sequence relationship, dynamic priority, and deviation direction are merged and registered to obtain the diversion position deviation status.

[0036] S402: Based on the diversion position deviation status, compare the switching path between the current position and the target diversion position, determine the action connection relationship between the loop switching direction and the airflow intervention level, mark the loop switching occupancy position according to the switching direction, and obtain the switching occupancy determination status; The system acquires the current position marker, target diversion position marker, deviation direction, loop lock flag, and fan action insertion position in the airflow intervention level. It then retrieves the loop switching path record, reading the channel name, channel idle marker, actuator standby marker, and switching direction marker along the path from the current position to the target position. The controller first compares whether a direct switching path exists between the current and target positions. If the direct channel is idle, it registers the channel as a candidate switching path. If the direct channel is occupied by the diversion actuator, it continues reading the backup channel record. If the backup channel is also occupied, the switching action is registered as pending. Next, it determines the action connection relationship between the loop switching direction and the airflow intervention level. If the airflow intervention level requires fan adjustment to be pre-positioned, and the diversion loop switching direction also points to the enhanced heat exchange branch, the switching direction is registered as a same-direction connection. If the airflow intervention level requires… If the fan action is delayed, but the branch still needs to be changed before the diversion loop switching direction can be initiated, the switching direction is registered as a priority candidate for diversion. If the airflow intervention level is balanced and the diversion position deviation status has been registered as no deviation, the switching direction is registered as a hold candidate. At the same time, the channel occupancy position is set according to the diversion loop occupancy status handling rules: forward switching occupies the forward channel position, reverse switching occupies the reverse channel position, hold status does not occupy the switching channel, and waiting status only retains the candidate path without writing a new switching command. If the fan frequency increase, valve group opening, and diversion switching are competing in the same control cycle, the heat exchange side pressure stability and supply air temperature stability are checked first according to the execution action conflict resolution rules before deciding whether to enter the current window for diversion switching, in order to reduce energy consumption and fluctuations during the operating condition switching process. Finally, the switching path, direction connection relationship, channel occupancy position, and waiting status are merged and registered to obtain the switching occupancy judgment status.

[0037] S403: Based on the switching occupancy determination status, check the switching channel occupancy status, compare the correspondence between the occupancy status and the deviation direction of the diversion position, determine the intervention sequence of the diversion loop switching action, and obtain the diversion locking level; The system acquires the forward channel position, reverse channel position, hold marker, wait marker, actuator positioning feedback, and diversion position deviation direction. It then checks the switching channel occupancy status. If the channel position corresponding to the target direction is free and the actuator is in a command-receiving state, the diversion switching action is registered as interventionable. If the channel position corresponding to the target direction is occupied, the occupancy source is read, distinguishing between switching in progress, waiting for confirmation, or abnormal locking. When the occupancy source is switching in progress, the controller adds the current switching action to the waiting queue. When the occupancy source is waiting for confirmation, the controller continues to check the positioning feedback and prohibits repeated writing of same-direction switching commands. When the occupancy source is abnormal locking, the controller transfers the switching action to the locking record. Next, the system compares the occupancy status with the diversion position deviation direction. If the current position deviates forward and the forward channel is free, the airflow intervention level is read. The system considers the fan adjustment insertion position and valve group correction status in the hot-side adjustment level. When fan adjustment is registered as a candidate for priority, the diversion action is scheduled after the fan adjustment action. When valve group correction is not yet confirmed, the diversion action is scheduled after the valve group correction action. When neither fan adjustment nor valve group correction occupies a priority position, the diversion action is registered as the currently available action. If there is a delay in the feedback of the execution component's arrival, communication confirmation fails, or the channel occupancy status is not cleared, the diversion switch is moved to the next sending window according to the action shifting rule, while maintaining the previous stable branch position. If the current position deviates backward and the reverse channel is free, the diversion action is registered according to the loop back direction. If the current position does not deviate, the diversion action does not enter the sending sequence. Finally, the channel occupancy status, deviation direction correspondence, available conclusion, action shifting result, and loop lockout priority are combined and arranged to obtain the diversion lockout level.

[0038] like Figure 6 As shown, the specific steps for obtaining the cooperative execution sequence are as follows: S501: Based on the split locking level, obtain the communication confirmation status of the actuator control board, compare the communication confirmation message return period with the command sending link period, determine the correspondence between the return identifier and the loop locking priority, adjust the command link access order, and obtain the communication handshake flag. The system acquires the loop lockout priority, switching channel occupancy status, intervention conclusion, and waiting flag. Then, it retrieves the communication records of the actuator control board, extracting the communication confirmation status, feedback flag, command reception flag, command link attribution, and actuator board attribution item by item. The controller first checks if the actuator control board corresponds to the current rooftop air conditioning unit. If the board attribution matches, the board is connected to the current collaborative command link; if the board attribution does not match, the feedback record is transferred to the verification queue. Next, the feedback attribution of the communication confirmation message is compared with the attribution of the command sending link. If the feedback attribution and the command link are within the same control arrangement range, it is registered as a link match; if the feedback attribution lags behind the command link, it is registered as confirmation lag; if the feedback attribution is earlier than the command link, it is registered as old message feedback. Then, the system reads the receive confirmation, execution confirmation, and exception confirmation from the feedback flag. When the feedback flag... When the signal is received and the loop lockout priority is registered as "intervention allowed" and the switching channel is not abnormally locked, the command link access order is maintained at the current arrangement. When the feedback signal is "execution confirmation" and the loop lockout priority is registered as "waiting for confirmation," the waiting flag is rewritten to the confirmed state. When the feedback signal is "abnormal confirmation," or communication confirmation fails, or the confirmation delay exceeds the current control arrangement range, the corresponding diversion switching, valve group correction, or fan frequency adjustment is moved to the next sending window according to the action shifting rule, while retaining the previous stable action state. When the execution confirmation has not yet returned, and the loop lockout priority points to "waiting for confirmation," the subsequent command link access order is shifted to avoid repeatedly writing diversion switching commands. Finally, the communication confirmation status, feedback attribution relationship, lockout priority correspondence, action shifting result, and command access order are merged and registered to obtain the communication handshake flag.

[0039] S502: Based on the communication handshake flag, monitor the action holding status of the outdoor fan driver, compare the fan holding feedback with the current position of the air supply angle actuator, determine the correspondence between the current position of the air supply angle and the correction direction, arrange the holding action and the angle correction action, and obtain the execution holding timing sequence. The system checks whether the command link is accessible, whether the actuator control board has been confirmed, whether the loop lock-up priority is in a waiting state, and whether the previous command has a hold flag. Then, it retrieves feedback from the outdoor fan driver to extract the fan's operating status, action hold flag, action confirmation status, fan frequency feedback, and hold command source. Next, it retrieves feedback from the air supply angle actuator to read the current position, target correction direction, positioning feedback, jamming flag, and angle command source. The controller first determines whether the outdoor fan driver is still in a hold action. If the hold flag exists and the action confirmation returns continuously, it is registered as holding. If the hold flag disappears and the feedback has been added to the new command link, it is registered as updatable. If the hold flag exists but the confirmation is interrupted, it is registered as holding pending verification. Then, it compares the fan hold feedback with the current position of the air supply angle. If the outdoor fan is still maintaining the current heat exchange side airflow action, and the current position of the air supply angle is compared with the correction direction... When the direction is consistent, the angle correction action is registered as a continuation candidate; when the fan holding action has not been completed, and the current position of the air supply angle is opposite to the correction direction, the air supply angle correction action is registered as a waiting candidate; when the fan can be updated and the air supply angle has not reached the target direction, the angle correction action is registered as an insertable candidate; at the same time, the air supply temperature stability, the duct static pressure stability, and the heat exchange side pressure stability are combined to determine whether airflow compensation is allowed to intervene in advance. If the heat exchange side pressure is still not stable, the fan frequency adjustment and air supply angle correction should not be significantly activated at the same time. The heat exchange adjustment or valve group opening correction should be maintained first, and then the airflow compensation window should be entered; if the duct static pressure deviation increases and the heat exchange side pressure has stabilized, the fan frequency or air supply angle action is allowed to enter the insertable candidate; finally, the fan holding status, the current position of the air supply angle, the corresponding relationship of the correction direction, the airflow compensation constraints, and the action arrangement results are merged and registered to obtain the execution holding sequence.

[0040] S503: Based on the execution holding timing, compare the sending relationship between the loop switching action and the valve group correction action, determine the access position of the fan adjustment action and the air supply angle correction action, adjust the order of action sending, and obtain the coordinated execution sequence; The system acquires the following information: action sequence, angle correction candidate position, communication handshake flag, loop lockout priority, and fan holding status. Then, it retrieves the valve group correction action, compressor frequency action confirmation status, and pressure-frequency linkage status from the hot-side regulation level. Next, it retrieves the loop switching action, switching channel occupancy status, and intervention order from the diversion lockout level. The controller first compares the transmission relationship between the loop switching action and the valve group correction action. If the loop switching channel is idle and the lockout priority allows intervention, and the valve group correction action has not yet entered the transmission state, the loop switching action is placed before the valve group correction action. If the valve group correction action has been sent but not yet completed, the loop switching action is registered as an adjacent waiting position. If the loop switching channel is still occupied, awaiting confirmation, or the lockout has not been released, the valve group correction action is retained in the hot-side transmission queue, and the loop switching action is registered as a subsequent candidate. If the valve group correction action has not yet completed and the evaporator-side arrangement still needs correction, the valve group action is placed before the diversion switching action. Next, determine the connection positions of the fan adjustment action and the air supply angle correction action, and supplement the reading of the air supply guarantee status and fan frequency adjustment insertion position in the airflow intervention level. If the air supply guarantee status is registered as insufficient air supply, and the fan driver can receive the command, and the heat exchange side pressure is not in a rapid deviation state, then insert the fan adjustment action after the heat side action and before the air supply angle correction action. If the current position of the air supply angle is inconsistent with the correction direction, and the fan is still in the holding position, then place the angle correction action after the holding action. Finally, according to the dynamic priority calculation rules and the execution action conflict resolution rules, actions that have been confirmed by communication, have not been occupied by the channel, can be received by the actuator, and are conducive to the stability of air supply temperature, duct static pressure, and heat exchange side pressure are ranked first. Actions that are waiting for confirmation, have occupied channels, have not been locked, or cause a sudden increase in energy consumption and amplification of fluctuations are ranked last. The order of sending loop switching, valve group correction, fan adjustment, and air supply angle correction is merged into a unified command arrangement to obtain a coordinated execution sequence.

[0041] In this embodiment; The dynamic priority calculation rules are as follows: Within the same control cycle, the central coordinating controller reads the following data: supply air temperature deviation, duct static pressure deviation, condenser side pressure deviation, evaporator side pressure deviation, supply air volume deficiency, air quality level, communication confirmation status, and actuator receptivity status. When the supply air temperature deviation continues to increase, or the condenser side pressure and evaporator side pressure are in a rapid deviation state, temperature stability and heat exchanger side pressure stability are registered as high priorities. When the heat exchanger side pressure has stabilized, but the duct static pressure deviation increases or the supply air volume is lower than the supply air requirement corresponding to the air quality level, duct static pressure stability and airflow compensation are registered as the next highest priorities. When the current position is inconsistent with the target diversion position, but the switching channel is occupied, waiting for confirmation, or locked, the diversion switching priority is downgraded. When communication confirmation fails, the actuator is unreceived, or the feedback batch is not updated, the priority of the corresponding action is not increased. Finally, the action priority order for the current cycle is generated in the following order: temperature stability, heat exchanger side pressure stability, duct static pressure stability, supply air guarantee, diversion position correction, and angle correction.

[0042] The rules for resolving execution conflicts are as follows: Before sending a command, the central coordinating controller compares whether the compressor frequency action, valve group opening action, fan frequency action, diversion loop switching action, and air supply angle correction action are in the same sending window. When multiple actions correspond to the same actuator, the same communication link, the same switching channel, or the action directions cancel each other out, they are registered as direct conflicts. When compressor frequency increase, valve group opening, fan frequency increase, and diversion switching are requested simultaneously and may cause overshoot in air supply temperature, duct static pressure, or heat exchange side pressure, they are registered as coupled conflicts. For direct conflicts, only actions that have been confirmed by communication, can be received by the actuator, and have the highest priority are retained, and the remaining actions are moved to the adjacent sending window. For coupled conflicts, actions for stabilizing heat exchange side pressure and air supply temperature are sent first, followed by actions for airflow compensation and air supply angle correction. When subsequent actions depend on the confirmation of the previous action, new commands are not written again before the confirmation feedback is returned.

[0043] The rules for handling the occupancy status of the shunt loop are as follows: The central coordinating controller reads the current position, target shunt position, forward channel position, reverse channel position, hold flag, waiting flag, position feedback, and lock flag of the variable shunt heat exchange loop; when the current position needs to switch forward to the target position, only the forward channel position is checked; when the current position needs to reverse back, only the reverse channel position is checked; if the target direction channel position is idle and the execution unit is in a command-receiving state, it is registered as intervening; if the target direction channel position is occupied by a switching action, the current switch is added to the waiting queue; if the target direction channel position is in a waiting confirmation state, the position feedback is read again, and the same-direction switching command is not written repeatedly; if the target direction channel position is in an abnormal lock state, the switching action is removed from the current sending queue, and the previous stable branch position is maintained; if the current position is consistent with the target shunt position, the switching channel is not occupied, and the shunt action does not enter the sending sequence.

[0044] The rules for postponing actions when communication confirmation fails or is delayed are as follows: Before sending commands for compressor frequency, valve group opening, fan frequency, split circuit switching, or air supply angle correction, the central coordinating controller reads the communication confirmation status, command reception flag, execution confirmation flag, abnormal confirmation flag, and feedback update status of the corresponding actuator control board. When the reception confirmation is normal and the actuator can receive the command, the command remains in the current sending position. When only the reception confirmation is returned and the execution confirmation is not returned, subsequent actions that depend on the execution result are postponed to the next sending window. When the feedback message lags behind the current command link, the feedback batch is not updated, or the confirmation is delayed, the previous stable frequency, the previous stable opening, the previous stable branch position, or the previous stable air supply angle is maintained, and no new commands of the same type are sent. When an abnormal confirmation is returned or communication confirmation fails, the corresponding action is removed from the current sending queue, and its candidate position is retained until the communication confirmation and actuator status are reread in the next control cycle before participating in the sorting.

[0045] The sequential constraints between airflow compensation and heat exchange regulation are as follows: Before inserting fan frequency regulation or air supply angle correction actions, the central coordinating controller first reads the heat exchange side pressure status, compressor frequency action confirmation status, valve group opening action confirmation status, air supply temperature deviation status, and duct static pressure deviation status. When the condensing side pressure or evaporating side pressure is still rapidly deviating, or when the compressor frequency or valve group opening has not yet been confirmed, the airflow compensation action must not be executed simultaneously with the heat exchange regulation action, but should be registered as a candidate for later execution. When the heat exchange side pressure tends to stabilize and the air supply temperature does not fluctuate in the opposite direction, if the duct static pressure deviation widens, the air supply volume is insufficient, or the air quality level increases, then the fan frequency regulation is allowed to enter the current sending window. When the air supply volume is insufficient but the duct static pressure has already deviated positively, the fan frequency is not directly increased, but the valve group opening, diversion loop, or air supply angle is waited for to be corrected. When both fan frequency regulation and air supply angle correction are requested simultaneously, the fan frequency stabilization action is executed first, followed by the air supply angle correction action.

[0046] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A method for coordinated control of rooftop air conditioning, characterized in that, The method includes: Based on the central coordinating controller, the target supply air temperature and return air temperature are collected according to the control cycle, the static pressure of the air duct is verified at the time, and the continuity of the feedback is identified by combining the condensing pressure and evaporating pressure link to obtain temperature and pressure correlation data. Based on the temperature-pressure correlation data, the condensing pressure is classified into the heat exchange side pressure state. Combining the evaporating pressure and the direction of compressor frequency change, the valve group correction sequence is determined according to the opening degree of the electronic expansion valve to obtain the heat-side regulation level. Based on the aforementioned heat-side adjustment level, the static pressure of the air duct is classified into the airflow-side pressure deviation range. The air supply volume guarantee status is checked according to the target indoor pressure. The fan adjustment insertion position is selected according to the air quality level to obtain the airflow intervention level. Based on the airflow intervention level, the current position of the variable flow splitting heat exchange loop is identified, the switching direction is checked according to the target flow splitting position, and the flow splitting action intervention sequence is locked according to the loop switching occupancy position to obtain the flow splitting locking level; Based on the aforementioned diversion locking level, the communication confirmation status of the actuator control board is placed into the command link, the outdoor fan action is maintained, the current position of the air supply angle is checked, and the order of sending each execution action is arranged to obtain the coordinated execution sequence.

2. The collaborative control method for rooftop air conditioning according to claim 1, characterized in that, The temperature and pressure correlation data includes supply and return air temperature difference, static pressure timescale offset, and refrigerant pressure ratio. The heat-side regulation level includes condensing load rate, evaporating load rate, and valve frequency coupling coefficient. The airflow intervention level includes indoor pressure difference, supply air margin, and ventilation demand level. The diversion lock-in level includes diversion position deviation, switching duty cycle, and loop lock-in priority. The cooperative execution sequence includes communication handshake flag, execution hold sequence, and action priority.

3. The collaborative control method for rooftop air conditioning according to claim 1, characterized in that, The specific steps for obtaining the temperature-pressure correlation data are as follows: Based on the central coordinating controller, the target supply air temperature and the return air temperature of the roof air conditioning unit are analyzed, the control cycle to which the two temperature sampling identifiers belong is compared, the temperature difference record formed by the return air hot state and the supply air target is calculated, the temperature consistency state is determined, and the temperature difference cycle index is obtained. Based on the temperature difference cycle index, the sampling time of the duct static pressure feedback within the control cycle is analyzed, the sampling time is compared with the start and end range of the control cycle, the static pressure feedback attribution flag is adjusted, the connection status between the static pressure time scale and the temperature time scale is determined, and the static pressure time scale offset status is obtained. Based on the static pressure timescale offset state, the condensing pressure feedback link identifier and the evaporating pressure feedback link identifier are analyzed. The connection state of the pressure feedback link and the static pressure feedback timescale in the same period is compared to determine the sensor feedback interruption state and obtain temperature and pressure correlation data.

4. The collaborative control method for rooftop air conditioning according to claim 1, characterized in that, The specific steps for obtaining the heat-side adjustment level are as follows: Based on the temperature and pressure correlation data, the periodicity of the condensing pressure sensor feedback and the evaporating pressure feedback is analyzed, the connection status of the condensing side link identifier and the evaporating side link identifier is compared, the correspondence between the exhaust side load direction and the heat absorption state is determined, and the heat exchange side pressure state is obtained. Based on the heat exchange side pressure state, the direction of change of evaporation pressure feedback is analyzed, the direction of change of compressor variable frequency drive operating frequency is compared, and the arrangement relationship between frequency up-adjustment state, frequency down-adjustment state, frequency holding state and heat absorption state of evaporation heat exchange side is determined to obtain the pressure-frequency linkage state. Based on the aforementioned pressure-frequency linkage state, the valve group opening of the electronic expansion valve driver is analyzed, the valve group opening adjustment direction is compared with the compressor operating frequency change direction, the sending position of the valve group correction action and the compressor frequency action is determined, and the hot-side adjustment level is obtained.

5. The coordinated control method for rooftop air conditioning according to claim 1, characterized in that, The specific steps for obtaining the airflow intervention level are as follows: Based on the aforementioned hot-side adjustment level, the timing of the duct static pressure feedback is detected, the control cycle to which the duct static pressure feedback belongs is analyzed, the control cycle is compared with the hot-side action arrangement cycle, the direction of deviation between the duct static pressure and the target indoor pressure is determined, and the airflow pressure difference status is obtained. Based on the airflow pressure difference status, the target indoor pressure and current air supply volume are obtained, the air supply status corresponding to the indoor pressure difference is analyzed, the current air supply volume is compared with the air quality level air supply requirements, the air supply volume guarantee status is determined, the ventilation demand level is calculated, and the air supply guarantee verification status is obtained. Based on the air supply guarantee verification status, candidate positions for fan frequency adjustment are detected, the air supply guarantee status and the action sequence of the heat-side adjustment level are analyzed, the fan adjustment position and the heat exchange side action position are compared, the fan frequency adjustment insertion position is screened, and the airflow intervention level is obtained.

6. The collaborative control method for rooftop air conditioning according to claim 1, characterized in that, The specific steps for obtaining the traffic splitting lock level are as follows: Based on the airflow intervention level, the current position of the variable flow splitting heat exchange loop is detected, the adjustment requirements of the loop branch to which the current position belongs and the airflow intervention level are checked, the channel sequence relationship between the current position and the target flow splitting position is compared, the direction of flow splitting position deviation is determined, and the flow splitting position deviation status is obtained. Based on the diversion position deviation state, compare the switching path between the current position and the target diversion position, determine the action connection relationship between the loop switching direction and the airflow intervention level, mark the loop switching occupancy position according to the switching direction, and obtain the switching occupancy determination state. Based on the switching occupancy determination status, the switching channel occupancy status is checked, the correspondence between the occupancy status and the deviation direction of the diversion position is compared, the intervention sequence of the diversion loop switching action is determined, and the diversion locking level is obtained.

7. The coordinated control method for rooftop air conditioning according to claim 1, characterized in that, The steps for obtaining the cooperative execution sequence are as follows: Based on the aforementioned diversion locking level, the communication confirmation status of the actuator control board is obtained, the communication confirmation message return period is compared with the command sending link period, the correspondence between the return identifier and the loop locking priority is determined, the command link access order is adjusted, and the communication handshake flag is obtained. Based on the communication handshake flag, monitor the outdoor fan driver's action holding status, compare the fan holding feedback with the current position of the air supply angle actuator, determine the correspondence between the current position of the air supply angle and the correction direction, arrange the holding action and the angle correction action, and obtain the execution holding timing sequence. Based on the execution holding timing, the relationship between the loop switching action and the valve group correction action is compared, the access position of the fan adjustment action and the air supply angle correction action is determined, and the order of action transmission is adjusted to obtain the coordinated execution sequence.

8. The coordinated control method for rooftop air conditioning according to claim 1, characterized in that, The target supply air temperature refers to the supply air side temperature setpoint received by the central coordinating controller, which represents the control target on the air outlet side of the roof air conditioning unit. The return air temperature refers to the air temperature detected at the return air inlet of the roof air conditioning unit, which represents the thermal state of the building space air when it returns to the unit.

9. The coordinated control method for rooftop air conditioning according to claim 1, characterized in that, The duct static pressure refers to the pressure feedback inside the air supply duct detected by the static pressure sensor, which is used to characterize the duct resistance and air supply pressure status. The heat exchange side pressure status refers to the refrigerant heat exchange load status formed by the feedback from the condensing pressure sensor and the evaporating pressure sensor.

10. The collaborative control method for rooftop air conditioning according to claim 1, characterized in that, The frequency change direction refers to the frequency change trend of the compressor inverter driver within the control cycle, indicating whether the compressor is in a frequency increase, frequency decrease, or hold state. The airflow side pressure deviation range refers to the pressure deviation range formed between the duct static pressure and the target indoor pressure.

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