Multi-connected air handling unit control method, device, system and storage medium

Abstract

The present application relates to a multi-split air handling unit control method, device, system and storage medium, wherein the method includes: obtaining outdoor ambient temperature and temperature data in the multi-split air handling unit, mainly including return air temperature, outlet air stability, refrigerant temperature and wire controller temperature, automatically determining whether to introduce fresh air mode based on the above data, and controlling the output capacity of the outdoor unit based on whether the fresh air mode is introduced, the target outlet air setting temperature set by the user and the return air temperature. Throughout the process, whether to introduce the fresh air mode is automatically determined based on the collected temperature parameters, without the need for human intervention and setting, without lag and error, and can achieve reliable multi-split air handling unit control.

Description

Technical Field

[0001] The present application relates to the field of intelligent control technology, and in particular to a control method, device, system and storage medium for a multi-split air handling unit. Background Art

[0002] Due to the many advantages of multi-split air handling units, such as large capacity, small footprint, simple installation, easy maintenance, high efficiency and energy saving, as well as strong compatibility and ability to be used for air purification, multi-split air handling units are currently being used in large and medium-sized energy-saving buildings.

[0003] Air handling units (combination cabinets for short) are mostly used to introduce fresh air, which is similar to the use of fresh air fans, but they are used in different working conditions or load conditions. In some scenarios or conditions, fresh air is not introduced, that is, they are treated as ordinary indoor units, that is, they only need to perform cooling, heating or air supply.

[0004] Whether fresh air is introduced or not will have a great impact on system parameters, especially on capacity control and unit reliability. However, the traditional control method for whether fresh air is introduced is manual control / setting. This setting is often prone to omissions and is accompanied by lags and errors, making it impossible to achieve reliable control of the multi-split air handling unit. Summary of the Invention

[0005] Based on this, it is necessary to provide a multi-air handling unit control method, device, computer equipment and storage medium that can achieve reliable control of the multi-air handling unit in order to address the problem that traditional technologies cannot achieve reliable control of the multi-air handling unit.

[0006] A multi-air handling unit control method, the method comprising:

[0007] Obtain outdoor ambient temperature and temperature data of the multi-split air handling unit (AHU). The temperature data of the multi-split air handling unit includes return air temperature, outlet air temperature, refrigerant temperature, and wired controller temperature.

[0008] Determine whether to introduce fresh air mode based on the outdoor ambient temperature and the temperature data in the multi-split air handling unit;

[0009] Read the target air outlet temperature set by the user;

[0010] The outdoor unit capacity output is controlled according to the target air outlet temperature, whether to introduce fresh air mode and return air temperature.

[0011] In one embodiment, controlling the output capacity of the outdoor unit according to the target outlet air setting temperature, whether to introduce the fresh air mode, and the return air temperature includes:

[0012] If the fresh air mode is introduced, the fresh air output ratio is obtained according to the target air outlet set temperature and return air temperature, and the outdoor unit capacity output value is obtained according to the fresh air output ratio;

[0013] If the fresh air mode is not introduced, the return air output ratio is obtained according to the target air outlet setting temperature and the return air temperature, and the outdoor unit capacity output value is obtained according to the return air output ratio.

[0014] In one embodiment, obtaining the fresh air output ratio according to the target outlet air setting temperature and the return air temperature includes:

[0015] In cooling mode, obtain the cooling temperature difference between the return air temperature and the target outlet air set temperature, calculate the ratio of the cooling temperature difference to the return air temperature, and obtain the fresh air output ratio;

[0016] In heating mode, the heating temperature difference between the target outlet air set temperature and the return air temperature is obtained, and the ratio of the heating temperature difference to the return air temperature is calculated to obtain the fresh air output ratio.

[0017] In one embodiment, obtaining the outdoor unit capacity output value according to the fresh air output ratio includes:

[0018] Get the rated capacity of the indoor units of the multi-split air handling unit;

[0019] According to the ratio of the rated capacity of the indoor unit and the fresh air output, the output value of the outdoor unit output capacity is obtained;

[0020] Based on the return air output ratio, the output value of the outdoor unit capacity is obtained, including:

[0021] Get the rated capacity of the indoor units of the multi-split air handling unit;

[0022] According to the ratio of the rated capacity of the indoor unit and the return air output, the output value of the outdoor unit output capacity is obtained.

[0023] In one embodiment, determining whether to introduce the fresh air mode based on the outdoor ambient temperature and the temperature data in the multi-split air handling unit includes:

[0024] Obtain the difference between the outdoor ambient temperature and the return air temperature, the difference between the return air temperature and the outlet air temperature, the difference between the refrigerant temperature and the outlet air temperature, and the difference between the return air temperature and the wired controller temperature to obtain a difference value set;

[0025] Determine whether all differences in the difference set are no greater than a corresponding preset difference threshold;

[0026] If so, it is determined that fresh air mode should be introduced;

[0027] If not, it is determined that the fresh air mode is not introduced.

[0028] In one embodiment, determining whether all differences in the difference value set are not greater than corresponding preset difference thresholds includes:

[0029] Determining whether the difference between the outdoor ambient temperature and the return air temperature is not greater than a preset first difference threshold;

[0030] Determining whether the difference between the return air temperature and the outlet air temperature is not greater than a preset second difference threshold;

[0031] Determining whether the difference between the refrigerant temperature and the outlet air temperature is not greater than a preset third difference threshold;

[0032] Furthermore, it is determined whether the difference between the return air temperature and the wired controller temperature is not greater than a preset fourth difference threshold.

[0033] In one embodiment, before obtaining the outdoor ambient temperature and the temperature data of the multi-split air handling unit, the method further includes:

[0034] After power-on, the system will continue to run for the first preset period of time in the fresh air introduction mode;

[0035] Obtaining outdoor ambient temperature and temperature data in multi-split air handling units includes:

[0036] Continue to run the preset second time period, and collect real-time data on the outdoor ambient temperature and the temperature in the multi-split air handling unit during the preset second time period.

[0037] A multi-air handling unit control device, comprising:

[0038] The temperature parameter acquisition module is used to obtain the outdoor ambient temperature and the temperature data of the multi-split air handling unit. The temperature data of the multi-split air handling unit includes the return air temperature, the outlet air temperature, the refrigerant temperature and the wired controller temperature;

[0039] The mode judgment module is used to determine whether to introduce the fresh air mode based on the outdoor ambient temperature and the temperature data of the multi-split air handling unit;

[0040] Reading module, used to read the target air outlet temperature set by the user;

[0041] The control module is used to control the output capacity of the outdoor unit according to the target air outlet temperature, whether to introduce the fresh air mode and the return air temperature.

[0042] A multi-split air handling unit control system includes a temperature acquisition module and a control module. The temperature acquisition module respectively acquires the ambient temperature and the return air temperature, outlet air temperature, refrigerant temperature and wire controller temperature in the multi-split air handling unit, and sends the acquired data to the control module. The control module is loaded with a computer program, and the steps of the above method are implemented when the control module executes the computer program.

[0043] A computer device includes a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are performed:

[0044] Obtain outdoor ambient temperature and temperature data of the multi-split air handling unit (AHU). The temperature data of the multi-split air handling unit includes return air temperature, outlet air temperature, refrigerant temperature, and wired controller temperature.

[0045] Determine whether to introduce fresh air mode based on the outdoor ambient temperature and the temperature data in the multi-split air handling unit;

[0046] Read the target air outlet temperature set by the user;

[0047] The outdoor unit capacity output is controlled according to the target air outlet temperature, whether to introduce fresh air mode and return air temperature.

[0048] A computer-readable storage medium stores a computer program, which, when executed by a processor, implements the following steps:

[0049] Obtain outdoor ambient temperature and temperature data of the multi-split air handling unit (AHU). The temperature data of the multi-split air handling unit includes return air temperature, outlet air temperature, refrigerant temperature, and wired controller temperature.

[0050] Determine whether to introduce fresh air mode based on the outdoor ambient temperature and the temperature data in the multi-split air handling unit;

[0051] Read the target air outlet temperature set by the user;

[0052] The outdoor unit capacity output is controlled according to the target air outlet temperature, whether to introduce fresh air mode and return air temperature.

[0053] The aforementioned multi-split air handling unit control method, device, system, and storage medium acquire outdoor ambient temperature and temperature data within the multi-split air handling unit, primarily including return air temperature, outlet air temperature, refrigerant temperature, and wired controller temperature. Based on this data, the system automatically determines whether to introduce fresh air mode and controls the outdoor unit's output capacity based on whether fresh air mode is introduced, the user-set target outlet air temperature, and the return air temperature. Throughout this process, whether to introduce fresh air mode is automatically determined based on the collected temperature parameters, eliminating the need for human intervention and lag and error, thereby enabling reliable multi-split air handling unit control. BRIEF DESCRIPTION OF THE DRAWINGS

[0054] Figure 1 This is a diagram of an application environment of a multi-air handling unit control method according to an embodiment;

[0055] Figure 21 is a flow chart of a method for controlling a multi-split air handling unit in one embodiment;

[0056] Figure 3 A schematic flow chart of a method for controlling a multi-split air handling unit in another embodiment;

[0057] Figure 4 The figure is a flow chart of a control method for a multi-air handling unit in an application example;

[0058] Figure 5 This is a structural block diagram of a multi-air handling unit control device in one embodiment;

[0059] Figure 6 FIG. 1 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0061] In-depth research on multi-split air handling unit (MSU) control has revealed that the control of MSU system parameters depends on whether or not fresh air is introduced. Specifically, in a cooling system operating without fresh air, the indoor air side is a closed space. The refrigeration cycle of the indoor unit will gradually lower the indoor temperature, eventually reaching the user's set temperature (this type of control is called internal return air temperature control). However, due to the continuous inflow of high-temperature air after the introduction of fresh air, the indoor temperature cannot be lowered. Therefore, compared to the case without fresh air, the system needs to increase its output capacity to reach the user's set temperature. This type of control is called discharge air temperature control. This is called fresh air control, which requires increased unit output capacity compared to normal control. This can increase the energy consumption of the MSU and increase the potential for wear and tear on MSU components (such as the MSU outdoor unit, expansion valve components, and air handling unit assembly). Therefore, the impact of fresh air introduction on the entire MSU needs to be considered to ensure reliable control of the MSU.

[0062] The multi-air handling unit control method provided in this application is a specific technical solution proposed under the premise of the above concept, which can be applied to Figure 1 In the application environment shown. Figure 1The system includes a multi-split outdoor unit 1, a single electronic expansion valve component 2, a double electronic expansion valve component 3, a control box 4, an air handling cabinet 5, a refrigerant inlet pipe temperature sensor 6, a refrigerant outlet pipe temperature sensor 7, a return air temperature sensor 8, an outlet air temperature sensor 9, and a wired controller temperature sensor 10. The temperature sensors collect temperature data at corresponding locations and send the temperature data to the control box 4. The control box 4 obtains the outdoor ambient temperature and the temperature data in the multi-split air handling unit. The temperature data in the multi-split air handling unit includes the return air temperature, the outlet air temperature, the refrigerant temperature, and the wired controller temperature. The control box 4 determines whether to introduce the fresh air mode based on the outdoor ambient temperature and the temperature data in the multi-split air handling unit. The control box reads the target outlet air setting temperature set by the user. The outdoor unit output capacity is controlled based on the target outlet air setting temperature, whether to introduce the fresh air mode, and the return air temperature. It is understandable that the temperature sensor can be replaced with other temperature-collecting devices, such as temperature sensors.

[0063] In one embodiment, Figure 2 As shown, a multi-air handling unit control method is provided, which is applied to Figure 1 The control box 4 in the embodiment is used as an example to illustrate, including the following steps:

[0064] S200: Acquire the outdoor ambient temperature and temperature data of the multi-split air handling unit. The temperature data of the multi-split air handling unit includes the return air temperature, the outlet air temperature, the refrigerant temperature, and the wired controller temperature.

[0065] Multiple temperature sensors located in different locations can collect data on the outdoor ambient temperature and the temperature of the multi-split air handling unit. These temperature sensors transmit the collected temperature data to the control module, which then obtains the outdoor ambient temperature and the return air temperature, outlet air temperature, refrigerant temperature, and wired controller temperature of the multi-split air handling unit. It should be noted that the refrigerant temperature includes the refrigerant outlet pipe temperature and the refrigerant inlet pipe temperature.

[0066] S400: Determine whether to introduce fresh air mode based on the outdoor ambient temperature and the temperature data in the multi-split air handling unit.

[0067] As mentioned earlier, after fresh air is injected, the original cooling or heating effect of the multi-split air handling unit will be weakened (deteriorated). Therefore, the temperature of the outlet air, return air, and wired controller will change. Based on these temperature changes and the outdoor ambient temperature, the decision on whether to introduce the fresh air mode is made. It should be pointed out that the judgment on whether to introduce the fresh air mode is made automatically based on the collected outdoor ambient temperature and the temperature data of the multi-split air handling unit. It does not require manual intervention from the user, and the collected data is real-time data. It does not have the lag defect of traditional technology, and can efficiently and accurately determine whether to introduce the fresh air mode.

[0068] S600: Read the target air outlet temperature set by the user.

[0069] The target outlet air setting temperature refers to the desired indoor ambient temperature set by the user. The general conventional temperature is between 16°C and 30°C. The user can input the required target outlet air setting temperature to the multi-split air handling unit according to current needs. The specific user can set the target outlet air setting temperature through remote control, touch, voice, buttons, etc. The control module can pre-cache the target outlet air setting temperature set by the user, and read the data after determining whether to introduce the fresh air mode, or the controller directly reads the control message sent by the user through other devices (such as a remote control). The target outlet air setting temperature is carried in the control message. The controller directly reads the control message to obtain the target outlet air setting temperature. For example, it reads that the target outlet air setting temperature set by the current user is 22°C.

[0070] S800: Controls the outdoor unit's output capacity based on the target outlet air temperature, whether to introduce fresh air mode, and return air temperature.

[0071] When introducing fresh air mode, the original cooling or heating effect of the multi-split air handling unit will be weakened (deteriorate). In order to meet user needs and reach the target air outlet temperature set by the user as soon as possible, it is necessary to control the outdoor unit capacity output based on the target air outlet temperature, whether to introduce fresh air mode and the return air temperature.

[0072] The above-described multi-split air handling unit control method obtains outdoor ambient temperature and temperature data within the multi-split air handling unit, primarily including return air temperature, outlet air temperature, refrigerant temperature, and wired controller temperature. Based on this data, it automatically determines whether to introduce fresh air mode. The outdoor unit's output capacity is then controlled based on whether fresh air mode is introduced, the user-set target outlet air temperature, and the return air temperature. Throughout this process, whether to introduce fresh air mode is automatically determined based on the collected temperature parameters, eliminating the need for human intervention and the risk of lag or error, thus enabling reliable multi-split air handling unit control.

[0073] like Figure 3 As shown, in one embodiment, S800 includes:

[0074] S820: If the fresh air mode is introduced, the fresh air output ratio is obtained according to the target air outlet set temperature and the return air temperature, and the outdoor unit capacity output value is obtained according to the fresh air output ratio;

[0075] S840: If the fresh air mode is not introduced, the return air output ratio is obtained according to the target air outlet set temperature and the return air temperature, and the outdoor unit capacity output value is obtained according to the return air output ratio.

[0076] If the fresh air mode is introduced, the entire multi-split air handling unit enters the working state of the fresh air mode. It is necessary to calculate the fresh air output ratio based on the target outlet air setting temperature and the return air temperature, confirm the corresponding fresh air output ratio at this time, and then obtain the outdoor unit capacity output value based on the fresh air output ratio. Specifically, the fresh air output ratio can be obtained by first calculating the absolute value of the difference between the return air temperature and the target outlet air setting temperature, and then calculating the ratio of the absolute value of the difference to the return air temperature. Furthermore, the multi-split air handling unit conventionally has two modes: cooling and heating. In the cooling mode, the cooling temperature difference between the return air temperature and the target outlet air setting temperature is obtained, and the ratio of the cooling temperature difference to the return air temperature is calculated to obtain the fresh air output ratio, that is, the fresh air output ratio = (return air temperature - target outlet air setting temperature) / return air temperature. In the heating mode, the heating temperature difference between the target outlet air setting temperature and the return air temperature is obtained, and the ratio of the heating temperature difference to the return air temperature is calculated to obtain the fresh air output ratio, that is, the fresh air output ratio = (target outlet air setting temperature - return air temperature) / return air temperature.

[0077] If the fresh air mode is not introduced, the entire multi-split air handling unit enters the non-fresh air mode (return air mode) working state. It is also necessary to obtain the return air output ratio based on the target outlet air set temperature and the return air temperature, confirm the corresponding return air output ratio at this time, and then obtain the outdoor unit capacity output value based on the return air output ratio. Specifically, the difference between the return air temperature and the target outlet air set temperature is obtained, and then the ratio of this difference to the return air temperature is calculated to obtain the return air output ratio, that is, return air output ratio = (return air temperature - target outlet air set temperature) / return air temperature.

[0078] In one embodiment, obtaining the outdoor unit capacity output value according to the fresh air output ratio includes:

[0079] Obtain the rated capacity of the indoor unit of the multi-split air handling unit; obtain the output value of the outdoor unit's output capacity based on the rated capacity of the indoor unit and the ratio of fresh air output;

[0080] Based on the return air output ratio, the output value of the outdoor unit capacity is obtained, including:

[0081] Obtain the rated capacity of the indoor unit of the multi-split air handling unit; obtain the output value of the outdoor unit's output capacity based on the rated capacity of the indoor unit and the return air output ratio.

[0082] To calculate the outdoor unit's output capacity, you first need to obtain the indoor unit's rated capacity. This is a factory parameter for multi-split air handling units and can be directly read. The outdoor unit's output capacity is calculated based on the indoor unit's rated capacity and the fresh air / return air output ratio. Specifically, the outdoor unit's output capacity is calculated by multiplying the indoor unit's rated capacity by the fresh air / return air output ratio. For example, the outdoor unit's output capacity = indoor unit's rated capacity * fresh air output ratio, or the outdoor unit's output capacity = indoor unit's rated capacity * return air output ratio.

[0083] In one embodiment, determining whether to introduce the fresh air mode based on the outdoor ambient temperature and the temperature data in the multi-split air handling unit includes:

[0084] Obtain the difference between the outdoor ambient temperature and the return air temperature, the difference between the return air temperature and the outlet air temperature, the difference between the refrigerant temperature and the outlet air temperature, and the difference between the return air temperature and the wired controller temperature to obtain a difference set; determine whether the differences in the difference set are all no greater than the corresponding preset difference threshold; if so, determine to introduce the fresh air mode; if not, determine not to introduce the fresh air mode.

[0085] In this embodiment, determining whether to introduce the fresh air mode primarily involves calculating multiple difference values and comparing them with corresponding difference thresholds to determine whether any of the difference values are less than or equal to the corresponding preset difference thresholds. If so, the fresh air mode is determined to be introduced; if not, the fresh air mode is determined not to be introduced, and the system enters the non-fresh air mode, i.e., the return air mode. It should be noted that the "if not" here refers to the situation where as long as any one of the four difference values fails to meet the "less than or equal to" threshold for the corresponding preset difference, the determination is "no." A "yes" determination is only made when all four difference values are "less than or equal to" the corresponding preset difference threshold.

[0086] In one embodiment, determining whether all differences in the difference value set are not greater than corresponding preset difference thresholds includes:

[0087] Determine whether the difference between the outdoor ambient temperature and the return air temperature is not greater than the preset first difference threshold; determine whether the difference between the return air temperature and the outlet air temperature is not greater than the preset second difference threshold; determine whether the difference between the refrigerant temperature and the outlet air temperature is not greater than the preset third difference threshold; and determine whether the difference between the return air temperature and the wired controller temperature is not greater than the preset fourth difference threshold.

[0088] The preset first difference threshold, the preset second difference threshold, the preset third difference threshold and the preset fourth difference threshold are pre-set thresholds, which are determined by experimental calibration. Specifically, after the injection of fresh air, the original cooling or heating effect becomes worse. Therefore, the outlet air temperature, return air temperature, and the temperature change amplitude of the wire controller will change, and there will be no large temperature difference. For example, after running for 25 minutes in the non-fresh air cooling mode, there will be a significant drop in temperature indoors, while after running for 25 minutes in the circulating air cooling mode, the indoor temperature drop is not particularly obvious (of course, the specific temperature drop here is also related to the ambient temperature, the output power of the unit and the size of the indoor space. Here we only discuss the difference between fresh air mode and non-fresh air mode). In the actual calibration test process, after a certain proportion of fresh air volume (for example, 40%) is introduced, the actual measured data is used to evaluate and confirm the corresponding first difference threshold, preset second difference threshold, preset third difference threshold and preset fourth difference threshold.

[0089] In one embodiment, before obtaining the outdoor ambient temperature and the temperature data of the multi-split air handling unit, the method further includes:

[0090] After power-on, the system will continue to run for the first preset period of time in the fresh air introduction mode;

[0091] Acquiring the outdoor ambient temperature and the temperature data of the multi-split air handling unit includes: continuing to operate for a preset second time period, and collecting the outdoor ambient temperature and the temperature data of the multi-split air handling unit in real time during the preset second time period.

[0092] When the multi-split air handling unit is powered on and started, at the initial moment of startup, it starts to run continuously in the fresh air introduction mode for a period of time by default, for example, it can run for 10 minutes to ensure that the refrigerant has been fully circulated and can quickly produce a (cooling or heating) effect. After running for 10 minutes, it continues to run for a preset second time period, for example, it continues to run for 15 minutes. During this time period, the outdoor ambient temperature and the temperature data in the multi-split air handling unit are continuously collected in real time, and the subsequent state judgment of whether to enter the fresh air introduction mode is made based on the collected temperature data. In this embodiment, the preset first time period and the preset second time period are pre-set time periods. For example, the preset first time period can be 10 minutes, and the preset second time period can be 15 minutes. It can be set according to the needs of the actual situation. Specifically, the preset first time period is shorter than the preset second time period.

[0093] In order to explain the technical solution and effect of the multi-connected air handling unit control method of the present invention in detail, a specific application example is used below, and combined with Figure 1 The schematic diagram of the multi-air handling unit structure shown in Figure 4 The schematic diagram of the sorting process is described in detail. Figure 4 As shown, it specifically includes the following steps:

[0094] 1. After the system is started, it will be set to "fresh air mode" and run for 10 minutes by default to ensure that the refrigerant has been fully circulated and can quickly produce (cooling or heating) effects;

[0095] 2. After 10 minutes of operation, use the following control to determine whether the cabinet is currently in the state of introducing fresh air.

[0096] Within 15 consecutive minutes, the following conditions are determined:

[0097] (1)|When the outdoor ambient temperature TO-combination cabinet return air temperature sensor T8|≤X1℃ (such as X1=5); and

[0098] (2) |Combination cabinet return air temperature sensor T8 - outlet air temperature sensor T9|≤X2℃ (e.g. X2=10); and

[0099] (3) |Refrigerant outlet (inlet) pipe temperature T7 (T6) - outlet air temperature sensor T9|≤X3°C (e.g., X3=5); Here, the absolute value of the difference between the refrigerant outlet pipe temperature T7 and the refrigerant inlet pipe temperature T6 and the outlet air temperature sensor T9 must all be less than or equal to X3°C;

[0100] (4) | Combined cabinet return air temperature sensor package T8 - wire controller temperature sensor package T10 | ≤ X4℃ (if X4=5)

[0101] 3. If the above conditions are met, the system will be controlled by introducing fresh air; otherwise, the system will be controlled normally (i.e., without introducing fresh air);

[0102] 4. Capability output stage

[0103] A. When the system determines that it is in fresh air mode,

[0104] Refrigeration - Capacity output according to:

[0105] (1)Outdoor unit output capacity = indoor unit rated capacity * fresh air output ratio (%)

[0106] (2) Fresh air output ratio = (return air temperature sensor package T8 of combined cabinet - target air outlet setting temperature Tset (setting range is 16-30℃)) / return air temperature sensor package T8 of combined cabinet; the larger the difference, the greater the outdoor unit output; the smaller the difference, the smaller the outdoor unit output;

[0107] Heating capacity output according to

[0108] (1)Outdoor unit output capacity = indoor unit rated capacity * fresh air output ratio (%)

[0109] (2) Fresh air output ratio = (target outlet air setting temperature Tset - combination cabinet return air temperature sensor T) / combination cabinet return air temperature sensor T8;

[0110] B. When the system determines that it is not fresh air, the capacity output is as follows

[0111] (1)Outdoor unit capacity output = indoor unit rated capacity * return air output ratio (%)

[0112] (2) Return air output ratio = (return air temperature sensor package T8 of modular cabinet - target ambient setting temperature T1) / return air temperature sensor package T8 of modular cabinet.

[0113] It should be understood that, although the steps in the above-mentioned flowcharts are shown in sequence as indicated by the arrows, these steps are not necessarily performed in the order indicated by the arrows. Unless otherwise specified herein, there is no strict order restriction on the execution of these steps, and these steps can be performed in other orders. Moreover, at least a portion of the steps in the above-mentioned flowcharts may include multiple steps or multiple stages, and these steps or stages are not necessarily performed at the same time, but can be performed at different times. The execution order of these steps or stages is not necessarily to be performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of steps or stages in other steps.

[0114] like Figure 5 As shown, the present application also provides a multi-air handling unit control device, the device comprising:

[0115] The temperature parameter acquisition module 200 is used to obtain the outdoor ambient temperature and the temperature data of the multi-split air handling unit, the temperature data of the multi-split air handling unit includes the return air temperature, the outlet air temperature, the refrigerant temperature and the wired controller temperature;

[0116] The mode determination module 400 is used to determine whether to introduce the fresh air mode according to the outdoor ambient temperature and the temperature data of the multi-split air handling unit;

[0117] The reading module 600 is used to read the target air outlet temperature set by the user;

[0118] The control module 800 is used to control the output capacity of the outdoor unit according to the target air outlet setting temperature, whether to introduce the fresh air mode and the return air temperature.

[0119] The multi-split air handling unit control device captures outdoor ambient temperature and temperature data within the multi-split air handling unit, primarily including return air temperature, outlet air temperature, refrigerant temperature, and wired controller temperature. Based on this data, it automatically determines whether to introduce fresh air mode and controls the outdoor unit's output capacity based on whether fresh air mode is introduced, the user-set target outlet air temperature, and the return air temperature. Throughout this process, whether to introduce fresh air mode is automatically determined based on the collected temperature parameters, eliminating the need for human intervention and errors, and enabling reliable multi-split air handling unit control.

[0120] In one embodiment, the control module 800 is also used to obtain the fresh air output ratio based on the target outlet air setting temperature and the return air temperature if the fresh air mode is introduced, and obtain the outdoor unit capacity output value based on the fresh air output ratio; if the fresh air mode is not introduced, the return air output ratio is obtained based on the target outlet air setting temperature and the return air temperature, and obtain the outdoor unit capacity output value based on the return air output ratio.

[0121] In one embodiment, the control module 800 is further configured to, in cooling mode, obtain the cooling temperature difference between the return air temperature and the target outlet air setting temperature, calculate the ratio of the cooling temperature difference to the return air temperature, and obtain the fresh air output ratio. In heating mode, the control module 800 is further configured to obtain the heating temperature difference between the target outlet air setting temperature and the return air temperature, calculate the ratio of the heating temperature difference to the return air temperature, and obtain the fresh air output ratio.

[0122] In one embodiment, the control module 800 is also used to obtain the rated capacity of the indoor unit of the multi-split air handling unit; obtain the output value of the outdoor unit output capacity based on the rated capacity of the indoor unit and the ratio of the fresh air output; and obtain the output value of the outdoor unit output capacity based on the rated capacity of the indoor unit and the ratio of the return air output.

[0123] In one embodiment, the mode judgment module 400 is also used to obtain the difference between the outdoor ambient temperature and the return air temperature, the difference between the return air temperature and the outlet air temperature, the difference between the refrigerant temperature and the outlet air temperature, and the difference between the return air temperature and the wired controller temperature to obtain a difference set; determine whether the differences in the difference set are all not greater than the corresponding preset difference threshold; if so, determine to introduce the fresh air mode; if not, determine not to introduce the fresh air mode.

[0124] In one embodiment, the mode judgment module 400 is also used to judge whether the difference between the outdoor ambient temperature and the return air temperature is not greater than a preset first difference threshold; judge whether the difference between the return air temperature and the outlet air temperature is not greater than a preset second difference threshold; judge whether the difference between the refrigerant temperature and the outlet air temperature is not greater than a preset third difference threshold; and judge whether the difference between the return air temperature and the wired controller temperature is not greater than a preset fourth difference threshold.

[0125] In one embodiment, the temperature parameter acquisition module 200 is also used to power on and start, and continuously run for a preset first time period in the fresh air introduction mode; obtaining the outdoor ambient temperature and the temperature data in the multi-split air handling unit includes: continuing to run for a preset second time period, and collecting the outdoor ambient temperature and the temperature data in the multi-split air handling unit in real time during the preset second time period.

[0126] In addition, the present application also provides a multi-split air handling unit control system, including a temperature acquisition module and a control module. The temperature acquisition module collects the ambient temperature and the return air temperature, outlet air temperature, refrigerant temperature and wire controller temperature in the multi-split air handling unit, and sends the collected data to the control module. The control module is loaded with a computer program, and the steps of the above method are implemented when the control module executes the computer program.

[0127] Specific embodiments of the control device / system for an interconnected air handling unit can be found in the embodiments of the control method for an interconnected air handling unit described above and will not be further described here. Each module within the aforementioned control device / system for an interconnected air handling unit can be implemented in whole or in part via software, hardware, or a combination thereof. Each module can be embedded in or independent of a processor within a computer device in hardware form, or stored in a computer device memory in software form, allowing the processor to call and execute operations corresponding to each module.

[0128] In one embodiment, a computer device is provided. The computer device may be a server, and its internal structure diagram may be as follows: Figure 6 As shown. The computer device includes a processor, a memory, and a network interface connected via a system bus. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program, and a database. The internal memory provides an environment for the operation of the operating system and computer program in the non-volatile storage medium. The database of the computer device is used to store data such as preset threshold parameters. The network interface of the computer device is used to communicate with an external terminal via a network connection. When the computer program is executed by the processor, a method for controlling a networked air handling unit is implemented.

[0129] Those skilled in the art will understand that Figure 6 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different component arrangement.

[0130] In one embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0131] Obtain outdoor ambient temperature and temperature data of the multi-split air handling unit (AHU). The temperature data of the multi-split air handling unit includes return air temperature, outlet air temperature, refrigerant temperature, and wired controller temperature.

[0132] Determine whether to introduce fresh air mode based on the outdoor ambient temperature and the temperature data in the multi-split air handling unit;

[0133] Read the target air outlet temperature set by the user;

[0134] The outdoor unit capacity output is controlled according to the target air outlet temperature, whether to introduce fresh air mode and return air temperature.

[0135] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0136] If the fresh air mode is introduced, the fresh air output ratio is obtained according to the target outlet air setting temperature and the return air temperature, and the outdoor unit capacity output value is obtained according to the fresh air output ratio; if the fresh air mode is not introduced, the return air output ratio is obtained according to the target outlet air setting temperature and the return air temperature, and the outdoor unit capacity output value is obtained according to the return air output ratio.

[0137] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0138] In cooling mode, the cooling temperature difference between the return air temperature and the target outlet air setting temperature is obtained, the ratio of the cooling temperature difference to the return air temperature is calculated, and the fresh air output ratio is obtained; in heating mode, the heating temperature difference between the target outlet air setting temperature and the return air temperature is obtained, the ratio of the heating temperature difference to the return air temperature is calculated, and the fresh air output ratio is obtained.

[0139] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0140] Get the rated capacity of the indoor unit of the multi-split air handling unit; get the output value of the outdoor unit output capacity based on the rated capacity of the indoor unit and the ratio of the fresh air output; Get the rated capacity of the indoor unit of the multi-split air handling unit; get the output value of the outdoor unit output capacity based on the rated capacity of the indoor unit and the ratio of the return air output.

[0141] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0142] Obtain the difference between the outdoor ambient temperature and the return air temperature, the difference between the return air temperature and the outlet air temperature, the difference between the refrigerant temperature and the outlet air temperature, and the difference between the return air temperature and the wired controller temperature to obtain a difference set; determine whether the differences in the difference set are all no greater than the corresponding preset difference threshold; if so, determine to introduce the fresh air mode; if not, determine not to introduce the fresh air mode.

[0143] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0144] Determine whether the difference between the outdoor ambient temperature and the return air temperature is not greater than the preset first difference threshold; determine whether the difference between the return air temperature and the outlet air temperature is not greater than the preset second difference threshold; determine whether the difference between the refrigerant temperature and the outlet air temperature is not greater than the preset third difference threshold; and determine whether the difference between the return air temperature and the wired controller temperature is not greater than the preset fourth difference threshold.

[0145] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0146] After power-on, the system will continue to run for the preset first time period in the fresh air introduction mode; it will continue to run for the preset second time period, and collect the outdoor ambient temperature and the temperature data of the multi-split air handling unit in real time during the preset second time period.

[0147] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the following steps are implemented:

[0148] Obtain outdoor ambient temperature and temperature data of the multi-split air handling unit (AHU). The temperature data of the multi-split air handling unit includes return air temperature, outlet air temperature, refrigerant temperature, and wired controller temperature.

[0149] Determine whether to introduce fresh air mode based on the outdoor ambient temperature and the temperature data in the multi-split air handling unit;

[0150] Read the target air outlet temperature set by the user;

[0151] The outdoor unit capacity output is controlled according to the target air outlet temperature, whether to introduce fresh air mode and return air temperature.

[0152] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0153] If the fresh air mode is introduced, the fresh air output ratio is obtained according to the target outlet air setting temperature and the return air temperature, and the outdoor unit capacity output value is obtained according to the fresh air output ratio; if the fresh air mode is not introduced, the return air output ratio is obtained according to the target outlet air setting temperature and the return air temperature, and the outdoor unit capacity output value is obtained according to the return air output ratio.

[0154] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0155] In cooling mode, the cooling temperature difference between the return air temperature and the target outlet air setting temperature is obtained, the ratio of the cooling temperature difference to the return air temperature is calculated, and the fresh air output ratio is obtained; in heating mode, the heating temperature difference between the target outlet air setting temperature and the return air temperature is obtained, the ratio of the heating temperature difference to the return air temperature is calculated, and the fresh air output ratio is obtained.

[0156] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0157] Get the rated capacity of the indoor unit of the multi-split air handling unit; get the output value of the outdoor unit output capacity based on the rated capacity of the indoor unit and the ratio of the fresh air output; Get the rated capacity of the indoor unit of the multi-split air handling unit; get the output value of the outdoor unit output capacity based on the rated capacity of the indoor unit and the ratio of the return air output.

[0158] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0159] Obtain the difference between the outdoor ambient temperature and the return air temperature, the difference between the return air temperature and the outlet air temperature, the difference between the refrigerant temperature and the outlet air temperature, and the difference between the return air temperature and the wired controller temperature to obtain a difference set; determine whether the differences in the difference set are all no greater than the corresponding preset difference threshold; if so, determine to introduce the fresh air mode; if not, determine not to introduce the fresh air mode.

[0160] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0161] Determine whether the difference between the outdoor ambient temperature and the return air temperature is not greater than the preset first difference threshold; determine whether the difference between the return air temperature and the outlet air temperature is not greater than the preset second difference threshold; determine whether the difference between the refrigerant temperature and the outlet air temperature is not greater than the preset third difference threshold; and determine whether the difference between the return air temperature and the wired controller temperature is not greater than the preset fourth difference threshold.

[0162] In one embodiment, when the computer program is executed by a processor, the following steps are further implemented:

[0163] After power-on, the system will continue to run for the preset first time period in the fresh air introduction mode; it will continue to run for the preset second time period, and collect the outdoor ambient temperature and the temperature data of the multi-split air handling unit in real time during the preset second time period.

[0164] Those skilled in the art will appreciate that all or part of the processes in the above-mentioned embodiment methods can be implemented by instructing the relevant hardware through a computer program, and the above-mentioned computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to memory, storage, database or other media used in the embodiments provided in this application may include at least one of non-volatile and volatile memory. Non-volatile memory may include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. Volatile memory may include random access memory (RAM) or external cache memory. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM).

[0165] The technical features of the above embodiments can be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0166] The above embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art could make various modifications and improvements without departing from the spirit of the present application, all of which fall within the scope of protection of the present application. Therefore, the scope of protection of the present patent application shall be determined by the appended claims.

Claims

1. A multi-air handling unit control method, characterized in that: The method comprises: After power-on, the system will continue to run for the first preset period of time in the fresh air introduction mode; Continue to operate for a preset second time period, and collect in real time the outdoor ambient temperature and temperature data of the multi-split air handling unit during the preset second time period, wherein the temperature data of the multi-split air handling unit includes the return air temperature, the outlet air temperature, the refrigerant temperature, and the wired controller temperature; Determine whether to introduce fresh air mode according to the outdoor ambient temperature and the temperature data in the multi-split air handling unit; Read the target ambient temperature set by the user; In the mode without introducing fresh air, the outdoor unit capacity output is controlled according to the target ambient temperature and the return air temperature; The method of determining whether to introduce the fresh air mode based on the outdoor ambient temperature and the temperature data in the multi-split air handling unit includes: obtaining the difference between the outdoor ambient temperature and the return air temperature, the difference between the return air temperature and the outlet air temperature, the difference between the refrigerant temperature and the outlet air temperature, and the difference between the return air temperature and the wired controller temperature to obtain a difference set; determining whether the differences in the difference set are all no greater than the corresponding preset difference thresholds; if so, determining to introduce the fresh air mode; if not, determining not to introduce the fresh air mode.

2. The method according to claim 1, characterized in that In the non-introduction fresh air mode, the outdoor unit capacity output is controlled according to the target ambient temperature and the return air temperature: In the mode of not introducing fresh air, the return air output ratio is obtained according to the target environment setting temperature and the return air temperature, and the outdoor unit capacity output value is obtained according to the return air output ratio.

3. The method according to claim 2, characterized in that The obtaining of the return air output ratio according to the target environment setting temperature and the return air temperature includes: In cooling mode, obtaining a cooling temperature difference between the return air temperature and the target ambient temperature, calculating a ratio of the cooling temperature difference to the return air temperature, and obtaining a return air output ratio; In the heating mode, the heating temperature difference between the target environment setting temperature and the return air temperature is obtained, and the ratio of the heating temperature difference to the return air temperature is calculated to obtain the return air output ratio.

4. The method according to claim 2, characterized in that The obtaining of the outdoor unit capacity output value according to the return air output ratio includes: Get the rated capacity of the indoor units of the multi-split air handling unit; The output capacity output value of the outdoor unit is obtained according to the rated capacity of the indoor unit and the return air output ratio.

5. The method according to claim 1, wherein The determining whether all the differences in the difference set are not greater than the corresponding preset difference threshold comprises: Determining whether the difference between the outdoor ambient temperature and the return air temperature is not greater than a preset first difference threshold; Determining whether the difference between the return air temperature and the outlet air temperature is not greater than a preset second difference threshold; Determining whether the difference between the refrigerant temperature and the outlet air temperature is not greater than a preset third difference threshold; Furthermore, it is determined whether the difference between the return air temperature and the wired controller temperature is not greater than a preset fourth difference threshold.

6. A multi-air handling unit control device, characterized in that: The device comprises: a temperature parameter acquisition module, configured to start up upon power-on, continuously operate in a fresh air introduction mode for a preset first time period, continue to operate in a preset second time period, and collect in real time the outdoor ambient temperature and temperature data of the multi-split air handling unit during the preset second time period, wherein the temperature data of the multi-split air handling unit includes the return air temperature, the outlet air temperature, the refrigerant temperature, and the wired controller temperature; A mode judgment module is used to judge whether to introduce a fresh air mode according to the outdoor ambient temperature and the temperature data of the multi-split air handling unit; Reading module, used to read the target environment setting temperature set by the user; A control module is used to control the output capacity of the outdoor unit according to the target ambient temperature and the return air temperature in a mode where no fresh air is introduced; The mode judgment module is also used to obtain the difference between the outdoor ambient temperature and the return air temperature, the difference between the return air temperature and the outlet air temperature, the difference between the refrigerant temperature and the outlet air temperature, and the difference between the return air temperature and the wired controller temperature to obtain a difference set; determine whether the differences in the difference set are all no greater than the corresponding preset difference threshold; if so, determine to introduce the fresh air mode; if not, determine not to introduce the fresh air mode.

7. The device according to claim 6, characterized in that The mode judgment module is further configured to judge whether the difference between the outdoor ambient temperature and the return air temperature is not greater than a preset first difference threshold; and judge whether the difference between the return air temperature and the outlet air temperature is not greater than a preset second difference threshold; Determining whether the difference between the refrigerant temperature and the outlet air temperature is not greater than a preset third difference threshold; Furthermore, it is determined whether the difference between the return air temperature and the wired controller temperature is not greater than a preset fourth difference threshold.

8. A multi-air handling unit control system, characterized in that: It includes a temperature acquisition module and a control module. The temperature acquisition module respectively collects the ambient temperature and the return air temperature, outlet air temperature, refrigerant temperature and wire controller temperature in the multi-split air handling unit, and sends the collected data to the control module. The control module is loaded with a computer program. When the control module executes the computer program, the steps of the method described in any one of claims 1 to 5 are implemented.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

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