A control method, device, system and storage medium of a fresh air handling unit

Abstract

The application discloses a fresh air handling unit control method, device, system and storage medium, the method comprises: when the host of fresh air handling unit is opened, the air parameter of air inlet is acquired, wherein the air parameter comprises air temperature and air humidity; it is judged whether the air parameter satisfies specific condition or not; when the air parameter does not satisfy specific condition, the equipment opening sequence corresponding to the air parameter type is determined; the corresponding equipment is opened in turn according to the equipment opening sequence corresponding to the air parameter type to realize the adjustment of the air parameter, until the air parameter is adjusted to satisfy specific condition, the equipment that has not been opened in the equipment opening sequence corresponding to the air parameter type is stopped to continue to open, and the corresponding fresh air handling unit operation strategy is determined. The scheme provided by the application can determine the equipment for controlling air parameter and the opening sequence according to the air parameter, thereby improving the adjustment accuracy of the air parameter.

Description

Technical Field

[0001] This application relates to the field of air conditioning technology, and in particular to a control method, device, system and storage medium for a fresh air handling unit. Background Technology

[0002] A fresh air system uses high-pressure, high-flow-rate fans to forcefully deliver fresh air into the room from one side and exhaust it to the outside from the other side using specially designed exhaust fans, thus creating a fresh air flow field within the room. While delivering air, the system also filters, disinfects, sterilizes, oxygenates, and regulates the temperature of the incoming fresh air.

[0003] In existing technologies, the temperature of incoming fresh air is controlled by preheating or cooling the air with hot water from an air conditioner. This means that only the air conditioning unit preheats or cools the fresh air, which cannot guarantee that the temperature, humidity, and other air parameters of the incoming fresh air will meet expectations. Furthermore, existing technologies do not regulate humidity. In areas with high humidity, the incoming fresh air can make the indoor air too damp, harming the user experience and health, and easily leading to condensation in the capillary network.

[0004] Therefore, it is necessary to provide a control method for fresh air handling units to adjust air humidity and improve the accuracy of air parameter regulation. Summary of the Invention

[0005] This application provides a control method, device, system, and storage medium for a fresh air handling unit, which can adjust the air humidity and improve the accuracy of air parameter regulation.

[0006] This application provides a control method for a fresh air handling unit, including:

[0007] When the main unit of the fresh air handling unit is turned on, it acquires the air parameters of the incoming air, including air temperature and air humidity.

[0008] Determine whether the air parameters meet specific conditions;

[0009] When the air parameters do not meet specific conditions, determine the device turn-on sequence corresponding to the air parameter type;

[0010] According to the device activation sequence corresponding to the air parameter type, the corresponding devices are activated sequentially to adjust the air parameters until the air parameters are adjusted to meet specific conditions. Then, the activation of any devices that have not yet been activated according to the air parameter type is stopped, and the corresponding fresh air unit operation strategy is determined.

[0011] The beneficial effects of this application are as follows: When the main unit of the fresh air handling unit is turned on, it acquires the incoming air parameters, including air temperature and air humidity; it determines whether the air parameters meet specific conditions; when the air parameters do not meet the specific conditions, it determines the device activation sequence corresponding to the air parameter type; it sequentially activates the corresponding devices according to the activation sequence to adjust the air parameters until the air parameters are adjusted to meet the specific conditions, then it stops activating any remaining devices corresponding to the air parameter type and determines the corresponding fresh air handling unit operation strategy. Because multiple devices controlling air parameters are set up, including devices for adjusting air temperature and humidity, and the devices to be activated and their activation sequence are determined based on whether the air parameters meet specific conditions, the accuracy of air parameter adjustment is improved.

[0012] In one embodiment, when the air parameter is air humidity, determining whether the air parameter meets a specific condition includes:

[0013] Compare the air humidity with the target moisture content;

[0014] When the air humidity is greater than the target moisture content, it is determined that the air parameter does not meet the specific conditions;

[0015] Determining the device activation sequence corresponding to the air parameter type includes:

[0016] The equipment start-up sequence corresponding to the air parameter type is determined to be the secondary direct expansion system, the surface cooler, and the primary direct expansion system.

[0017] In one embodiment, when the air parameters do not meet specific conditions, the corresponding devices are sequentially activated according to the device activation sequence corresponding to the air parameter type to adjust the air parameters until the air parameters are adjusted to meet specific conditions. Then, activating any remaining devices among the devices corresponding to the air parameter type is stopped, and a corresponding fresh air unit operation strategy is determined, including:

[0018] When the air parameters do not meet specific conditions, the secondary direct expansion system is activated by frequency conversion, and the air humidity is detected.

[0019] When the air humidity equals the target moisture content after the secondary direct expansion system is started and the frequency conversion operation is turned on, stop turning on the equipment that has not yet been turned on in the equipment corresponding to the air parameter type, and determine the fresh air unit operation strategy to control the frequency conversion operation of the secondary direct expansion system.

[0020] In one embodiment, the method further includes:

[0021] When the air humidity exceeds the target moisture content after the secondary direct expansion system is started and the frequency conversion operation is started, the proportional-integral regulating valve of the surface cooler is opened.

[0022] When the air humidity equals the target moisture content after the proportional-integral control valve of the surface cooler is opened, stop opening any unopened equipment in the equipment corresponding to the air parameter type, and determine the fresh air unit's operating strategy as dynamic adjustment of the surface cooler's proportional-integral control valve to maintain stable air humidity.

[0023] In one embodiment, the method further includes:

[0024] When the air humidity after opening the proportional-integral regulating valve of the surface cooler is greater than the target moisture content, start the inverter operation of the first-stage direct expansion system;

[0025] When the air humidity equals the target moisture content after starting the first-stage direct expansion system variable frequency operation, stop turning on any equipment that has not yet been turned on in the equipment corresponding to the air parameter type, and determine the fresh air unit operation strategy as the first-stage direct expansion system variable frequency operation.

[0026] In one embodiment, the method further includes:

[0027] When the air humidity is lower than the target moisture content after the first-stage direct expansion system has been turned on and is in inverter operation, turn off the first-stage direct expansion system.

[0028] When the air humidity after opening the proportional-integral control valve of the surface cooler is less than the target moisture content, close the proportional-integral control valve of the surface cooler.

[0029] When the air humidity is lower than the target moisture content after the secondary direct expansion system has been turned on and is in inverter operation, turn off the secondary direct expansion system.

[0030] In one embodiment, when the fresh air handling unit is operating in heating mode and the air parameter is air temperature, determining whether the air parameter meets a specific condition includes:

[0031] Compare the air temperature with the target temperature;

[0032] When the air temperature is lower than the target temperature, it is determined that the specified air parameters do not meet the specific conditions;

[0033] Determining the device activation sequence corresponding to the air parameter type includes:

[0034] The equipment start-up sequence corresponding to the air parameter type is determined to be the surface cooler and the first-stage direct expansion system.

[0035] In one embodiment, when the air parameters do not meet specific conditions, the corresponding devices are turned on sequentially according to the device turn-on sequence corresponding to the air parameter type to adjust the air parameters until the air parameters are adjusted to meet the specific conditions. Then, the remaining devices in the corresponding air parameter type are stopped from being turned on, and a corresponding fresh air unit operation strategy is determined, including:

[0036] When the air parameters do not meet specific conditions, the proportional-integral regulating valve of the surface cooler is opened, and the air temperature is detected.

[0037] When the air temperature equals the target temperature after the proportional-integral control valve of the surface cooler is opened, stop opening any unopened equipment in the equipment corresponding to the air parameter type, and determine the fresh air unit's operating strategy as dynamic adjustment of the surface cooler's proportional-integral control valve to maintain stable air temperature.

[0038] In one embodiment, the method further includes:

[0039] When the air temperature after opening the proportional-integral regulating valve of the surface cooler is lower than the target temperature, start the inverter operation of the first-stage direct expansion system.

[0040] When the air temperature equals the target temperature after starting the first-stage direct expansion system variable frequency operation, stop starting any unstarted equipment in the equipment corresponding to the air parameter type, and determine the fresh air unit operation strategy as the first-stage direct expansion system variable frequency operation.

[0041] In one embodiment, the method further includes:

[0042] When the air temperature after opening the proportional-integral control valve of the surface cooler is higher than the target temperature, close the proportional-integral control valve of the surface cooler.

[0043] When the air temperature exceeds the target temperature after the primary direct expansion system is started and the frequency converter is activated, the primary direct expansion system should be shut down.

[0044] In one embodiment, the method further includes:

[0045] When air parameters meet specific conditions, the fresh air handling unit will start operating in ventilation mode.

[0046] This application also provides a control device for a fresh air handling unit, including:

[0047] The acquisition module is used to acquire the air parameters of the incoming air when the main unit of the fresh air unit is turned on, wherein the air parameters include air temperature and air humidity;

[0048] The judgment module is used to determine whether the air parameters meet specific conditions;

[0049] The determination module is used to determine the device activation sequence corresponding to the air parameter type when the air parameter does not meet specific conditions;

[0050] The adjustment module is used to sequentially turn on the corresponding devices according to the device turn-on sequence corresponding to the air parameter type to adjust the air parameter until the air parameter is adjusted to meet a specific condition, then stop turning on the devices that have not yet been turned on among the devices corresponding to the air parameter type, and determine the corresponding fresh air unit operation strategy.

[0051] In one embodiment, when the air parameter is air humidity, the determining module includes:

[0052] The first comparison submodule is used to compare the air humidity with the target moisture content;

[0053] The first determining submodule is used to determine that the air parameter does not meet a specific condition when the air humidity is greater than the target moisture content;

[0054] The determining module is further configured to:

[0055] The equipment start-up sequence corresponding to the air parameter type is determined to be the secondary direct expansion system, the surface cooler, and the primary direct expansion system.

[0056] In one embodiment, the adjustment module includes:

[0057] The first activation submodule is used to activate the frequency conversion operation of the secondary direct expansion system and detect the air humidity when the air parameters do not meet specific conditions.

[0058] The first stop submodule is used to stop the operation of the equipment that has not yet been turned on among the equipment corresponding to the air parameter type when the air humidity equals the target moisture content after the frequency conversion operation of the secondary direct expansion system is started, and to determine the fresh air unit operation strategy as controlling the frequency conversion operation of the secondary direct expansion system.

[0059] In one embodiment, the adjustment module includes:

[0060] The first activation submodule is also used to activate the surface cooler proportional-integral regulating valve when the air humidity is greater than the target moisture content after the variable frequency operation of the secondary direct expansion system is activated.

[0061] The first stop submodule is also used to stop the continued opening of the equipment that has not yet been opened among the equipment corresponding to the air parameter type when the air humidity equals the target moisture content after the proportional integral regulating valve of the surface cooler is opened, and to determine the fresh air unit operation strategy as dynamic adjustment of the proportional integral regulating valve of the surface cooler to maintain stable air humidity.

[0062] In one embodiment, the adjustment module includes:

[0063] The first activation submodule is also used to activate the frequency conversion operation of the first-stage direct expansion system when the air humidity after the proportional integral regulating valve of the surface cooler is opened is greater than the target moisture content.

[0064] The first stop submodule is also used to stop turning on the equipment that has not yet been turned on among the equipment corresponding to the air parameter type when the air humidity equals the target moisture content after the first-level direct expansion system is turned on by frequency conversion, and to determine the fresh air unit operation strategy as the first-level direct expansion system by frequency conversion.

[0065] In one embodiment, the adjustment module further includes:

[0066] The first shutdown submodule is used to shut down the first-stage direct expansion system when the air humidity is less than the target moisture content after the first-stage direct expansion system has been turned on for frequency conversion operation.

[0067] The first shut-off submodule is also used to shut off the proportional-integral control valve of the surface cooler when the air humidity after the surface cooler proportional-integral control valve is opened is less than the target moisture content.

[0068] The first shutdown submodule is also used to shut down the secondary direct expansion system when the air humidity is less than the target moisture content after the secondary direct expansion system has been started and the frequency conversion operation is turned on.

[0069] In one embodiment, when the fresh air handling unit is operating in heating mode and the air parameter is air temperature, the determination module includes:

[0070] The second comparison submodule is used to compare the air temperature with the target temperature;

[0071] The second determining submodule is used to determine that the determined air parameters do not meet specific conditions when the air temperature is lower than the target temperature.

[0072] The determining module is further configured to:

[0073] The equipment start-up sequence corresponding to the air parameter type is determined to be the surface cooler and the first-stage direct expansion system.

[0074] In one embodiment, the adjustment module includes:

[0075] The second activation submodule is used to activate the proportional-integral regulating valve of the surface cooler and detect the air temperature when the air parameters do not meet specific conditions.

[0076] The second stop submodule is used to stop the continued opening of devices that have not yet been opened among the devices corresponding to the air parameter type when the air temperature equals the target temperature after the proportional-integral control valve of the surface cooler is opened, and to determine the fresh air unit operation strategy as dynamic adjustment of the proportional-integral control valve of the surface cooler to maintain stable air temperature.

[0077] In one embodiment, the adjustment module includes:

[0078] The second activation submodule is also used to activate the frequency conversion operation of the first-stage direct expansion system when the air temperature after opening the proportional integral regulating valve of the surface cooler is lower than the target temperature.

[0079] The second stop submodule is also used to stop the continued operation of the equipment that has not yet been turned on among the equipment corresponding to the air parameter type when the air temperature equals the target temperature after the first-stage direct expansion system is turned on by frequency conversion, and to determine the fresh air unit operation strategy as the first-stage direct expansion system by frequency conversion.

[0080] In one embodiment, the adjustment module further includes:

[0081] The second shut-off submodule is used to shut off the proportional-integral control valve of the surface cooler when the air temperature after opening the valve is greater than the target temperature.

[0082] The second shutdown submodule is also used to shut down the primary direct expansion system when the air temperature exceeds the target temperature after the primary direct expansion system has been started and the frequency converter is running.

[0083] In one embodiment, the apparatus further includes:

[0084] The ventilation module is used to activate the ventilation mode of the fresh air handling unit when air parameters meet specific conditions.

[0085] This application also provides a control system for a fresh air handling unit, including:

[0086] At least one processor; and,

[0087] A memory communicatively connected to the at least one processor; wherein,

[0088] The memory stores instructions that can be executed by the at least one processor to implement the control method for the fresh air handling unit described in any of the above embodiments.

[0089] This application also provides a computer-readable storage medium, which, when the instructions in the storage medium are executed by a processor corresponding to the control system of the fresh air handling unit, enables the control system of the fresh air handling unit to implement the control method of the fresh air handling unit described in any of the above embodiments.

[0090] Other features and advantages of this application will be set forth in the description which follows, and will be apparent in part from the description, or may be learned by practicing the application. The objectives and other advantages of this application may be realized and obtained by means of the structures particularly pointed out in the written description, claims, and drawings.

[0091] The technical solution of this application will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0092] The accompanying drawings are provided to further illustrate the present application and form part of the specification. They are used together with the embodiments of the present application to explain the application and do not constitute a limitation thereof. In the drawings:

[0093] Figure 1 This is a flowchart of a control method for a fresh air handling unit in one embodiment of this application;

[0094] Figure 2 This is a schematic diagram of the structure of a three-cold-source dehumidification fresh air handling unit according to one embodiment of this application;

[0095] Figure 3 This is a connection diagram of a three-source dehumidification fresh air handling unit according to one embodiment of this application;

[0096] Figure 4 This is a schematic diagram of the structure of a control device for a fresh air handling unit according to one embodiment of this application;

[0097] Figure 5 This is a schematic diagram of the hardware structure of a fresh air handling unit control system according to one embodiment of this application. Detailed Implementation

[0098] The preferred embodiments of this application are described below with reference to the accompanying drawings. It should be understood that the preferred embodiments described herein are for illustration and explanation only and are not intended to limit this application.

[0099] Figure 1 This is a flowchart of a control method for a fresh air handling unit according to an embodiment of this application, such as... Figure 1 As shown, the method can be implemented as follows: S101-S104:

[0100] In step S101, when the main unit of the fresh air handling unit is turned on, the air parameters of the incoming air are acquired;

[0101] In step S102, it is determined whether the air parameters meet specific conditions;

[0102] In step S103, when the air parameters do not meet specific conditions, the device turn-on sequence corresponding to the air parameter type is determined;

[0103] In step S104, the corresponding devices are turned on sequentially according to the device turn-on sequence corresponding to the air parameter type to adjust the air parameters until the air parameters are adjusted to meet specific conditions. Then, the devices that have not yet been turned on among the devices corresponding to the air parameter type are stopped, and the corresponding fresh air unit operation strategy is determined.

[0104] This application applies to multi-source fresh air handling units, such as Figure 2 and Figure 3 The figures shown are a structural schematic diagram and a connection schematic diagram of a three-source dehumidification fresh air handling unit according to an embodiment of this application. Figure 2 As shown, the fresh air handling unit includes a surface cooling section, a direct expansion section, and a secondary direct expansion section. The surface cooling section can operate in cooling, heating, and dehumidification modes; however, due to the shutdown of the central cold and heat source system during the transition season, it can only operate in ventilation mode. The primary direct expansion section is a heat pump type, capable of operating in cooling, heating, and dehumidification modes. It can provide deep dehumidification in summer and heating in winter, and can also operate independently during the transition season, cooling or heating the fresh air. The secondary section is a single-cooling type, capable of operating in cooling and dehumidification modes. To prevent the air temperature from becoming too low after multiple cooling cycles, a built-in condenser is installed in the reheat section of the secondary direct expansion section for fresh air reheating. Furthermore, in... Figure 2 In the aforementioned fresh air handling unit, both the first and second stage direct expansion sections are equipped with external air-cooled condensers to discharge the condensation heat of the direct expansion section to the outdoor atmosphere through the external condensers, thus avoiding the drawback of increasing the energy consumption of the entire refrigeration system by only discharging the condensation heat to the cold source system.

[0105] In this application, when the main unit of the fresh air handling unit is turned on, it acquires the air parameters of the incoming air. These air parameters can be air humidity and air temperature, or data such as oxygen concentration and pollutant concentration. The air parameters can be acquired through sensors built into the fresh air handling unit; for example, air humidity can be acquired through a humidity sensor, and air temperature through a temperature sensor. Alternatively, the air parameters at the location of the fresh air handling unit can be acquired through the cloud. This application does not limit the scope of the acquisition.

[0106] Determine whether the air parameters meet specific conditions. These specific conditions can be pre-set parameters, such as air humidity not exceeding 50%; they can also be user-defined; or they can be automatically adjusted based on the current season.

[0107] When the air parameters do not meet specific conditions, the device activation sequence corresponding to the air parameter type is determined, and the corresponding devices are activated sequentially according to the device activation sequence to adjust the air parameters until the air parameters are adjusted to meet specific conditions. Then, the activation of the devices that have not yet been activated among the devices corresponding to the air parameter type is stopped, and the corresponding fresh air unit operation strategy is determined.

[0108] For example, in Figure 2When the fresh air unit adjusts the air humidity, it compares the air humidity with the target moisture content. When the obtained intake air humidity is greater than the target moisture content, it indicates that the current air humidity is too high. It is determined that the air parameters do not meet the specific conditions, and the dehumidification mode is determined. The surface cooler, the first stage and the second stage direct expansion section jointly undertake the dehumidification task, and the second stage direct expansion section is operated first. At the same time, based on the outdoor fresh air moisture content, the surface cooler section and the first stage direct expansion section are turned on in sequence. Specifically, when the air humidity is greater than the target moisture content, the dehumidification function of the secondary direct expansion system is activated by frequency conversion, and the air humidity is monitored. If the air humidity after activating the secondary direct expansion system by frequency conversion equals the target moisture content, the dehumidification functions of the surface cooling section and the primary direct expansion section are no longer activated. If the air humidity after activating the secondary direct expansion system by frequency conversion is still greater than the target moisture content, it indicates that the dehumidification capacity of the secondary direct expansion section alone is insufficient. In this case, the proportional-integral control valve of the surface cooler is activated to dehumidify through the surface cooling section. If the air humidity after activating the proportional-integral control valve of the surface cooler equals the target moisture content, the dehumidification function of the primary direct expansion section is no longer activated. If the air humidity after activating the proportional-integral control valve of the surface cooler is still greater than the target moisture content, the dehumidification function of the primary direct expansion system by frequency conversion is activated. If the air humidity after activating the primary direct expansion system by frequency conversion is equal to the target moisture content, the unactivated equipment in the corresponding air parameter type is stopped from activating.

[0109] For example, in Figure 2 When the fresh air handling unit adjusts the air temperature, in heating mode, the air temperature is compared with the target temperature. This target temperature can be preset or user-defined. When the air temperature is lower than the target temperature, it indicates that the current air temperature is too low, confirming that the specified air parameters do not meet the specific conditions, and heating mode needs to be activated. At this time, the surface cooling section handles the fresh air heating, controlling the supply air temperature according to the set value. If the surface cooling section's heating capacity is insufficient, the primary direct expansion section is activated for auxiliary heating. When the air parameters do not meet the specific conditions, the surface cooling unit's proportional-integral control valve is opened, and the air temperature is monitored. If the air temperature after opening the surface cooling unit's proportional-integral control valve equals the target temperature, the primary direct expansion section is no longer activated. Otherwise, if the air temperature after opening the surface cooling unit's proportional-integral control valve is lower than the target temperature, the primary direct expansion system is activated for inverter-driven heating. When the air temperature after activating the primary direct expansion system's inverter-driven operation equals the target temperature, the unactivated equipment corresponding to the air parameter type is stopped from activating. During the adjustment process, when the air temperature after opening the proportional-integral control valve of the surface cooler is higher than the target temperature, close the proportional-integral control valve of the surface cooler; when the air temperature after starting the inverter operation of the first-stage direct expansion system is higher than the target temperature, close the first-stage direct expansion system.

[0110] Furthermore, in this application, when the air parameters meet specific conditions, it means that there is no need to condition the air, and the unit is controlled to start the ventilation mode, and only the fresh air is filtered and purified.

[0111] It should be noted that in the cooling and dehumidification mode of this application, when the dehumidification task is jointly undertaken by the surface cooler, the first-stage, and second-stage direct expansion sections, the condensation heat of the second-stage direct expansion section is allocated according to the supply air temperature setpoint, and the heat dissipation ratio of the reheat condenser and the external condenser is allocated according to the supply air temperature rise requirements. By discharging the condensation heat of the direct expansion section to the outdoor atmosphere through the external condenser, the drawback of increasing the energy consumption of the entire refrigeration system by discharging the condensation heat to the primary cold source system is avoided. In the heating mode, in addition to the surface cooler section undertaking the fresh air heating and the first-stage direct expansion section providing heating, a humidification section can also be set up so that the fresh air unit can determine whether to activate the air humidification based on the supply air humidity.

[0112] Furthermore, during dehumidification in the transitional season, the central chiller is shut down, and there is no primary chilled water supply to the surface cooling section of the fresh air handling unit. Therefore, when the air humidity is relatively close to the second target moisture content, for example, above 70%, the fresh air handling unit activates the transitional season dehumidification and ventilation mode, prioritizing the activation of the secondary direct expansion section for dehumidification and monitoring the air humidity. When the secondary direct expansion section cannot meet the dehumidification requirements, the primary direct expansion section is activated. Simultaneously, the supply air is reheated according to the air temperature. During heating in the transitional season, since the central heat source system is shut down, and there is a sudden drop in temperature, the fresh air handling unit activates the heating mode, and the primary direct expansion section also activates its heating mode, heating the fresh air according to the air temperature setting. Therefore, this application solves the drawback of the fresh air handling unit only being able to operate in ventilation mode when the central chiller / heat source system is shut down in the transitional season, making the operating conditions of the fresh air handling unit more diversified and better adaptable to adjustments in air parameters under different climates.

[0113] The beneficial effects of this application are as follows: When the main unit of the fresh air handling unit is turned on, it acquires the incoming air parameters, including air temperature and air humidity; it determines whether the air parameters meet specific conditions; when the air parameters do not meet the specific conditions, it determines the device activation sequence corresponding to the air parameter type; it sequentially activates the corresponding devices according to the activation sequence to adjust the air parameters until the air parameters are adjusted to meet the specific conditions, then it stops activating any remaining devices corresponding to the air parameter type and determines the corresponding fresh air handling unit operation strategy. Because multiple devices controlling air parameters are set up, including devices for adjusting air temperature and humidity, and the devices to be activated and their activation sequence are determined based on whether the air parameters meet specific conditions, the accuracy of air parameter adjustment is improved.

[0114] In one embodiment, when the air parameter is air humidity, the above step S102 can be implemented as the following steps A1-A2:

[0115] In step A1, the air humidity is compared with the target moisture content;

[0116] In step A2, when the air humidity is greater than the target moisture content, it is determined that the air parameter does not meet the specific condition;

[0117] The above step S103 can be implemented as step A3 as follows:

[0118] In step A3, the equipment start-up sequence corresponding to the air parameter type is determined to be the secondary direct expansion system, the surface cooler, and the primary direct expansion system.

[0119] In this embodiment, the air humidity is compared with the target moisture content; wherein, the target moisture content can be a fixed value, such as 50%; it can also be a user-defined air humidity; or it can be an air humidity automatically determined by the system based on the external environment.

[0120] When the obtained intake air humidity is greater than the target humidity, it indicates that the current air humidity is too high, and the air parameters do not meet specific conditions, requiring the dehumidification mode to be activated. Figure 2 In the device shown, in dehumidification mode, the surface cooler, the first-stage and second-stage direct expansion sections jointly undertake the dehumidification task, and the device start-up sequence corresponding to the air parameter type is determined to be the second-stage direct expansion system, the surface cooler, and the first-stage direct expansion system.

[0121] In one embodiment, when the air parameters do not meet specific conditions, step S104 above can be implemented as steps A4-A5 as follows:

[0122] In step A4, when the air parameters do not meet specific conditions, the secondary direct expansion system is started to operate at a variable frequency, and the air humidity is detected.

[0123] In step A5, when the air humidity equals the target moisture content after the secondary direct expansion system is turned on and the equipment that has not yet been turned on is stopped from turning on the equipment corresponding to the air parameter type, and the fresh air unit operation strategy is determined to control the secondary direct expansion system to operate at the frequency.

[0124] In one embodiment, the method may also be implemented as follows: steps A6-A7:

[0125] In step A6, when the air humidity is greater than the target moisture content after the secondary direct expansion system is turned on and the frequency converter is started, the proportional-integral regulating valve of the surface cooler is opened.

[0126] In step A7, when the air humidity equals the target moisture content after the proportional-integral control valve of the surface cooler is opened, the operation of the unopened equipment in the equipment corresponding to the air parameter type is stopped, and the fresh air unit operation strategy is determined to be dynamic adjustment of the proportional-integral control valve of the surface cooler to maintain stable air humidity.

[0127] In one embodiment, the method may also be implemented as steps A8-A9:

[0128] In step A8, when the air humidity after opening the proportional-integral regulating valve of the surface cooler is greater than the target moisture content, the first-stage direct expansion system is started to operate at a variable frequency.

[0129] In step A9, when the air humidity equals the target moisture content after the primary direct expansion system is turned on and the unstarted equipment in the equipment corresponding to the air parameter type is stopped, and the fresh air unit operation strategy is determined to be the primary direct expansion system variable frequency operation.

[0130] In one embodiment, the method may also be implemented as follows: steps A10-A11:

[0131] In step A10, when the air humidity is less than the target moisture content after the first-stage direct expansion system is turned on and the frequency converter is running, the first-stage direct expansion system is turned off.

[0132] In step A11, when the air humidity is less than the target moisture content after the proportional-integral control valve of the surface cooler is opened, the proportional-integral control valve of the surface cooler is closed.

[0133] In step A12, when the air humidity is less than the target moisture content after the secondary direct expansion system is turned on and the frequency converter is running, the secondary direct expansion system is turned off.

[0134] In one embodiment, when the fresh air handling unit operates in heating mode and the air parameter is air temperature, the above step S102 can be implemented as the following steps B1-B2:

[0135] In step B1, the air temperature is compared with the target temperature;

[0136] In step B2, when the air temperature is lower than the target temperature, it is determined that the specified air parameters do not meet the specific conditions.

[0137] The above step S103 can be implemented as step B3 as follows:

[0138] In step B3, the equipment start-up sequence corresponding to the air parameter type is determined to be the surface cooler and the first-stage direct expansion system.

[0139] In this embodiment, the air temperature is compared with the target temperature; similarly, the target temperature can be preset or user-defined.

[0140] When the air temperature is lower than the target temperature, it indicates that the current air temperature is low and the specified air parameters do not meet the specific conditions, requiring the operation of the heating mode. In this case, the cooling coil section is responsible for heating the fresh air, controlling the supply air temperature according to the setpoint. If the cooling coil section's heating capacity is insufficient, the primary direct expansion section will activate for auxiliary heating. Additionally, the humidification section can be activated based on the air humidity to determine whether humidification is needed.

[0141] In one embodiment, when the air parameters do not meet specific conditions, step S104 above can be implemented as steps B4-B5 as follows:

[0142] In step B4, when the air parameters do not meet specific conditions, the proportional-integral regulating valve of the surface cooler is opened, and the air temperature is detected.

[0143] In step B5, when the air temperature equals the target temperature after the proportional-integral control valve of the surface cooler is opened, the operation of the unopened equipment in the equipment corresponding to the air parameter type is stopped, and the fresh air unit operation strategy is determined to be dynamic adjustment of the proportional-integral control valve of the surface cooler to maintain stable air temperature.

[0144] In one embodiment, the method may also be implemented as steps B6-B7:

[0145] In step B6, when the air temperature after opening the proportional-integral regulating valve of the surface cooler is lower than the target temperature, the first-stage direct expansion system is started to operate at a variable frequency.

[0146] In step B7, when the air temperature equals the target temperature after the primary direct expansion system is started and the non-started equipment in the equipment corresponding to the air parameter type is stopped, and the fresh air unit operation strategy is determined to be the primary direct expansion system variable frequency operation.

[0147] In one embodiment, the method may also be implemented as steps B8-B9:

[0148] In step B8, when the air temperature after opening the proportional-integral control valve of the surface cooler is greater than the target temperature, the proportional-integral control valve of the surface cooler is closed.

[0149] In step B9, when the air temperature is higher than the target temperature after the primary direct expansion system is started and the frequency converter is turned on, the primary direct expansion system is turned off.

[0150] In one embodiment, the method may also be implemented as step C1:

[0151] In step C1, when the air parameters meet specific conditions, the fresh air unit starts operating in ventilation mode.

[0152] In this embodiment, when the air parameters meet specific conditions, it means that there is no need to adjust the air conditions, and the unit is controlled to start the ventilation mode.

[0153] Figure 4 This is a schematic diagram of the structure of a control device for a fresh air handling unit according to an embodiment of this application, including:

[0154] The acquisition module 401 is used to acquire the air parameters of the incoming air when the main unit of the fresh air unit is turned on;

[0155] The judgment module 402 is used to determine whether the air parameters meet specific conditions;

[0156] The determining module 403 is used to determine the device start-up sequence corresponding to the air parameter type when the air parameter does not meet a specific condition;

[0157] The adjustment module 404 is used to sequentially turn on the corresponding devices according to the device turn-on sequence corresponding to the air parameter type to adjust the air parameter until the air parameter is adjusted to meet a specific condition, then stop turning on the devices that have not yet been turned on among the devices corresponding to the air parameter type, and determine the corresponding fresh air unit operation strategy.

[0158] In one embodiment, when the air parameter is air humidity, the determining module includes:

[0159] The first comparison submodule is used to compare the air humidity with the target moisture content;

[0160] The first determining submodule is used to determine that the air parameter does not meet a specific condition when the air humidity is greater than the target moisture content;

[0161] The determining module is further configured to:

[0162] The equipment start-up sequence corresponding to the air parameter type is determined to be the secondary direct expansion system, the surface cooler, and the primary direct expansion system.

[0163] In one embodiment, the adjustment module includes:

[0164] The first activation submodule is used to activate the frequency conversion operation of the secondary direct expansion system and detect the air humidity when the air parameters do not meet specific conditions.

[0165] The first stop submodule is used to stop the operation of the equipment that has not yet been turned on among the equipment corresponding to the air parameter type when the air humidity equals the target moisture content after the frequency conversion operation of the secondary direct expansion system is started, and to determine the fresh air unit operation strategy as controlling the frequency conversion operation of the secondary direct expansion system.

[0166] In one embodiment, the adjustment module includes:

[0167] The first activation submodule is also used to activate the surface cooler proportional-integral regulating valve when the air humidity is greater than the target moisture content after the variable frequency operation of the secondary direct expansion system is activated.

[0168] The first stop submodule is also used to stop the continued opening of the equipment that has not yet been opened among the equipment corresponding to the air parameter type when the air humidity equals the target moisture content after the proportional integral regulating valve of the surface cooler is opened, and to determine the fresh air unit operation strategy as dynamic adjustment of the proportional integral regulating valve of the surface cooler to maintain stable air humidity.

[0169] In one embodiment, the adjustment module includes:

[0170] The first activation submodule is also used to activate the frequency conversion operation of the first-stage direct expansion system when the air humidity after the proportional integral regulating valve of the surface cooler is opened is greater than the target moisture content.

[0171] The first stop submodule is also used to stop turning on the equipment that has not yet been turned on among the equipment corresponding to the air parameter type when the air humidity equals the target moisture content after the first-level direct expansion system is turned on by frequency conversion, and to determine the fresh air unit operation strategy as the first-level direct expansion system by frequency conversion.

[0172] In one embodiment, the adjustment module further includes:

[0173] The first shutdown submodule is used to shut down the first-stage direct expansion system when the air humidity is less than the target moisture content after the first-stage direct expansion system has been turned on for frequency conversion operation.

[0174] The first shut-off submodule is also used to shut off the proportional-integral control valve of the surface cooler when the air humidity after the surface cooler proportional-integral control valve is opened is less than the target moisture content.

[0175] The first shutdown submodule is also used to shut down the secondary direct expansion system when the air humidity is less than the target moisture content after the secondary direct expansion system has been started and the frequency conversion operation is turned on.

[0176] In one embodiment, when the air parameter is air temperature, the determining module includes:

[0177] The second comparison submodule is used to compare the air temperature with the target temperature;

[0178] The second determining submodule is used to determine that the determined air parameters do not meet specific conditions when the air temperature is lower than the target temperature.

[0179] The determining module is further configured to:

[0180] The equipment start-up sequence corresponding to the air parameter type is determined to be the surface cooler and the first-stage direct expansion system.

[0181] In one embodiment, the adjustment module includes:

[0182] The second activation submodule is used to activate the proportional-integral regulating valve of the surface cooler and detect the air temperature when the air parameters do not meet specific conditions.

[0183] The second stop submodule is used to stop the continued opening of devices that have not yet been opened among the devices corresponding to the air parameter type when the air temperature equals the target temperature after the proportional-integral control valve of the surface cooler is opened, and to determine the fresh air unit operation strategy as dynamic adjustment of the proportional-integral control valve of the surface cooler to maintain stable air temperature.

[0184] In one embodiment, the adjustment module includes:

[0185] The second activation submodule is also used to activate the frequency conversion operation of the first-stage direct expansion system when the air temperature after opening the proportional integral regulating valve of the surface cooler is lower than the target temperature.

[0186] The second stop submodule is also used to stop the continued operation of the equipment that has not yet been turned on among the equipment corresponding to the air parameter type when the air temperature equals the target temperature after the first-stage direct expansion system is turned on by frequency conversion, and to determine the fresh air unit operation strategy as the first-stage direct expansion system by frequency conversion.

[0187] In one embodiment, the adjustment module further includes:

[0188] The second shut-off submodule is used to shut off the proportional-integral control valve of the surface cooler when the air temperature after opening the valve is greater than the target temperature.

[0189] The second shutdown submodule is also used to shut down the primary direct expansion system when the air temperature exceeds the target temperature after the primary direct expansion system has been started and the frequency converter is running.

[0190] In one embodiment, the apparatus further includes:

[0191] The ventilation module is used to activate the ventilation mode of the fresh air handling unit when air parameters meet specific conditions.

[0192] Figure 5 This is a schematic diagram of the hardware structure of a fresh air handling unit control system according to one embodiment of this application, as shown below. Figure 5 As shown, the control system of this fresh air handling unit includes:

[0193] At least one processor 520; and,

[0194] Memory 504 communicatively connected to the at least one processor 520; wherein,

[0195] The memory 504 stores instructions that can be executed by the at least one processor 520 to implement the control method of the fresh air handling unit described in any of the above embodiments.

[0196] Reference Figure 5 The control system 500 of the fresh air unit may include one or more of the following components: processing component 502, memory 504, power supply component 506, multimedia component 508, audio component 510, input / output (I / O) interface 512, sensor component 514, and communication component 516.

[0197] Processing component 502 typically controls the overall operation of the control system 500 of the fresh air handling unit. Processing component 502 may include one or more processors 520 to execute instructions to complete all or part of the steps of the methods described above. Furthermore, processing component 502 may include one or more modules to facilitate interaction between processing component 502 and other components. For example, processing component 502 may include a multimedia module to facilitate interaction between multimedia component 508 and processing component 502.

[0198] Memory 504 is configured to store various types of data to support the operation of the control system 500 of the fresh air handling unit. Examples of this data include instructions for any application or method used to operate on the control system 500 of the fresh air handling unit, such as text, images, videos, etc. Memory 504 can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic storage, flash memory, magnetic disk, or optical disk.

[0199] The power supply component 506 provides power to various components of the control system 500 of the fresh air handling unit. The power supply component 506 may include a power management system, one or more power supplies, and other components associated with generating, managing, and distributing power to the control system 500 of the fresh air handling unit.

[0200] The multimedia component 508 includes a screen that provides an output interface between the control system 500 of the fresh air unit and the user. In some embodiments, the screen may include a liquid crystal display (LCD) and a touch panel (TP). If the screen includes a touch panel, the screen may be implemented as a touchscreen to receive input signals from the user. The touch panel includes one or more touch sensors to sense touches, swipes, and gestures on the touch panel. The touch sensors may not only sense the boundaries of touch or swipe actions but also detect the duration and pressure associated with the touch or swipe operation. In some embodiments, the multimedia component 508 may also include a front-facing camera and / or a rear-facing camera. When the control system 500 of the fresh air unit is in an operating mode, such as a shooting mode or a video mode, the front-facing camera and / or the rear-facing camera may receive external multimedia data. Each front-facing camera and rear-facing camera may be a fixed optical lens system or have focal length and optical zoom capabilities.

[0201] Audio component 510 is configured to output and / or input audio signals. For example, audio component 510 includes a microphone (MIC) configured to receive external audio signals when the control system 500 of the fresh air unit is in an operating mode, such as alarm mode, recording mode, voice recognition mode, and voice output mode. The received audio signals may be further stored in memory 504 or transmitted via communication component 516. In some embodiments, audio component 510 also includes a speaker for outputting audio signals.

[0202] I / O interface 512 provides an interface between processing component 502 and peripheral interface modules, such as keyboards, click wheels, buttons, etc. These buttons may include, but are not limited to, home buttons, volume buttons, power buttons, and lock buttons.

[0203] Sensor assembly 514 includes one or more sensors for providing status assessments of various aspects of the control system 500 of the fresh air handling unit. For example, sensor assembly 514 may include a sound sensor. Additionally, sensor assembly 514 can detect the on / off state of the control system 500, the relative positioning of components (e.g., the display and keypad of the control system 500), and the operating status of the control system 500 or a component of the control system 500, such as the operating status of the air distribution panel, structural status, the operating status of the discharge scraper, the orientation or acceleration / deceleration of the control system 500, and temperature changes of the control system 500. Sensor assembly 514 may include a proximity sensor configured to detect the presence of nearby objects without any physical contact. Sensor assembly 514 may also include a light sensor, such as a CMOS or CCD image sensor, for use in imaging applications. In some embodiments, sensor assembly 514 may also include an accelerometer, a gyroscope, a magnetic sensor, a pressure sensor, a material buildup thickness sensor, or a temperature sensor.

[0204] Communication component 516 is configured to enable the control system 500 of the fresh air handling unit to provide wired or wireless communication capabilities with other devices and cloud platforms. The control system 500 of the fresh air handling unit can access wireless networks based on communication standards, such as WiFi, 2G, or 3G, or combinations thereof. In one exemplary embodiment, communication component 516 receives broadcast signals or broadcast-related information from an external broadcast management system via a broadcast channel. In one exemplary embodiment, communication component 516 also includes a near-field communication (NFC) module to facilitate short-range communication. For example, the NFC module may be implemented based on radio frequency identification (RFID) technology, Infrared Data Association (IrDA) technology, ultra-wideband (UWB) technology, Bluetooth (BT) technology, and other technologies.

[0205] In an exemplary embodiment, the control system 500 of the fresh air handling unit may be implemented by one or more application-specific integrated circuits (ASICs), digital signal processors (DSPs), digital signal processing devices (DSPDs), programmable logic devices (PLDs), field-programmable gate arrays (FPGAs), controllers, microcontrollers, microprocessors, or other electronic components to perform the control method of the fresh air handling unit described in any of the above embodiments.

[0206] This application also provides a computer-readable storage medium, which, when the instructions in the storage medium are executed by a processor corresponding to the control system of the fresh air handling unit, enables the control system of the fresh air handling unit to implement the control method of the fresh air handling unit described in any of the above embodiments.

[0207] Those skilled in the art will understand that embodiments of this application can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including, but not limited to, disk storage and optical storage) containing computer-usable program code.

[0208] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0209] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0210] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0211] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A control method of a fresh air handling unit, characterized by, The method comprises the following steps: When the main machine of a new fan unit is started, the air parameters of the incoming air are acquired, wherein the air parameters include air temperature and air humidity; It is judged whether the air parameters meet a certain condition; When the air parameters do not meet the certain condition, the starting sequence of the equipment corresponding to the air parameter type is determined; According to the starting sequence of the equipment corresponding to the air parameter type, the corresponding equipment is started in sequence to adjust the air parameters, and when the air parameters are adjusted to meet the certain condition, the equipment that has not been started among the equipment corresponding to the air parameter type is stopped from being started continuously, and the operation strategy of the new fan unit is determined; In the case that the air parameters are air humidity, the step of judging whether the air parameters meet a certain condition comprises the following steps: The air humidity is compared with the target humidity content; When the air humidity is greater than the target humidity content, it is determined that the air parameters do not meet the certain condition; The step of determining the starting sequence of the equipment corresponding to the air parameter type comprises the following steps: The starting sequence of the equipment corresponding to the air parameter type is determined as a two-stage direct expansion system, a surface cooler and a one-stage direct expansion system.

2. The method of claim 1, wherein, When the air parameters do not meet the certain condition, according to the starting sequence of the equipment corresponding to the air parameter type, the corresponding equipment is started in sequence to adjust the air parameters, and when the air parameters are adjusted to meet the certain condition, the equipment that has not been started among the equipment corresponding to the air parameter type is stopped from being started continuously, and the operation strategy of the new fan unit is determined, which comprises the following steps: When the air parameters do not meet the certain condition, the two-stage direct expansion system is started to run at variable frequency, and the air humidity is detected; When the air humidity after the two-stage direct expansion system is started to run at variable frequency is equal to the target humidity content, the equipment that has not been started among the equipment corresponding to the air parameter type is stopped from being started continuously, and the operation strategy of the new fan unit is determined as controlling the two-stage direct expansion system to run at variable frequency.

3. The method of claim 2, wherein, The method further comprises the following steps: When the air humidity after the two-stage direct expansion system is started to run at variable frequency is greater than the target humidity content, the surface cooler proportional integral adjustment valve is started; When the air humidity after the surface cooler proportional integral adjustment valve is started is equal to the target humidity content, the equipment that has not been started among the equipment corresponding to the air parameter type is stopped from being started continuously, and the operation strategy of the new fan unit is determined as the surface cooler proportional integral adjustment valve is dynamically adjusted to maintain the air humidity stable.

4. The method of claim 3, wherein, The method further comprises the following steps: When the air humidity after the surface cooler proportional integral adjustment valve is started is greater than the target humidity content, the one-stage direct expansion system is started to run at variable frequency; When the air humidity after the one-stage direct expansion system is started to run at variable frequency is equal to the target humidity content, the equipment that has not been started among the equipment corresponding to the air parameter type is stopped from being started continuously, and the operation strategy of the new fan unit is determined as the one-stage direct expansion system is started to run at variable frequency.

5. The method of claim 1, wherein, In the case that the air parameters are air temperature and the working mode of the new fan unit is a heating mode, the step of judging whether the air parameters meet a certain condition comprises the following steps: The air temperature is compared with the target temperature; When the air temperature is less than the target temperature, it is determined that the air parameters do not meet the certain condition; The step of determining the starting sequence of the equipment corresponding to the air parameter type comprises the following steps: The determined device opening sequence corresponding to the air parameter type is a table cooler and a primary direct expansion system.

6. The method of claim 5, wherein, When the air parameter does not satisfy the specific condition, the corresponding device is opened in sequence according to the device opening sequence corresponding to the air parameter type to realize adjustment of the air parameter, and when the air parameter is adjusted to satisfy the specific condition, the opening of the device in the air parameter type that has not been opened is stopped, and a corresponding fresh air unit operation strategy is determined, including: When the air parameter does not satisfy the specific condition, the table cooler proportional integral adjustment valve is opened, and the air temperature is detected. When the air temperature after the table cooler proportional integral adjustment valve is opened is equal to the target temperature, the opening of the device in the air parameter type that has not been opened is stopped, and the fresh air unit operation strategy is determined to be table cooler proportional integral adjustment valve dynamic adjustment to maintain the stability of the air temperature.

7. A control device of a fresh air handling unit, characterized by Comprising: The acquisition module is configured to acquire the air parameter of the incoming air when the main machine of the fresh air unit is turned on, wherein the air parameter includes air temperature and air humidity. The judgment module is configured to judge whether the air parameter satisfies a specific condition. The determination module is configured to determine the device opening sequence corresponding to the air parameter type when the air parameter does not satisfy the specific condition. The adjustment module is configured to open the corresponding device in sequence according to the device opening sequence corresponding to the air parameter type to realize adjustment of the air parameter, and when the air parameter is adjusted to satisfy the specific condition, the opening of the device in the air parameter type that has not been opened is stopped, and a corresponding fresh air unit operation strategy is determined. In the case that the air parameter is air humidity, the judgment module comprises: The first comparison submodule is configured to compare the air humidity with the target humidity content. The first determination submodule is configured to determine that the air parameter does not satisfy the specific condition when the air humidity is greater than the target humidity content. The determination module is further configured to: The determined device opening sequence corresponding to the air parameter type is a secondary direct expansion system, a table cooler and a primary direct expansion system.

8. A control system of a fresh air handling unit, characterized by, Comprising: At least one processor; And The memory is in communication with the at least one processor; wherein The memory stores instructions executable by the at least one processor, and the instructions are executed by the at least one processor to implement the control method of the fresh air unit according to any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, When the instructions in the storage medium are executed by the processor corresponding to the control system of the fresh air unit, the control system of the fresh air unit can implement the control method of the fresh air unit according to any one of claims 1-6.

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