Fresh air conditioning method and device, air conditioning equipment and storage medium

Abstract

The embodiment of the application relates to a fresh air adjusting method and device, an air conditioning equipment and a storage medium. The temperature and humidity data of outdoor fresh air and operation parameters are collected. Whether the fresh air dew point temperature meets a first preset condition is judged according to the temperature and humidity data and the operation parameters, and whether the compressor meets a second preset condition is judged according to the operation parameters. If both conditions are met, whether the current indoor unit operation air baffle position and static pressure baffle position meet the fresh air introduction condition is judged. If the condition is met, the fresh air introduction parameter is outputted, so as to control the operation of the fresh air device according to the fresh air introduction parameter. Therefore, the outdoor fresh air temperature and humidity parameters and the air conditioning system operation parameters can be collected in real time, the double judgment of the dew point temperature and the compressor load state is based, and the adjustable interval analysis of the indoor unit air baffle position and the static pressure baffle position is combined. The accurate identification of the fresh air introduction opportunity and the self-adaptive adjustment of the fresh air volume are realized. The operation efficiency and the response speed of the energy-saving air conditioning system are significantly improved.

Description

Technical Field

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

[0002] When multi-split air conditioning systems provide cooling or heating, the room is usually in a closed state. Prolonged operation can lead to a decline in indoor air quality and affect human comfort. To address this, existing technologies introduce a fresh air unit into the indoor unit system. This unit mixes outdoor fresh air with indoor return air, exchanges heat through an evaporator, and then delivers fresh air into the room, thus regulating the temperature while simultaneously replenishing the air supply.

[0003] However, the introduction of fresh air can affect the heat exchange efficiency of the indoor unit. In cooling mode, introducing excessively high-temperature outdoor fresh air will lead to excessively high return air temperature, increasing the unit's heat exchange load and potentially failing to quickly meet cooling demands. Similarly, in heating mode, introducing excessively low-temperature outdoor fresh air will lead to excessively low return air temperature, also potentially failing to quickly meet heating demands. Furthermore, the frequency and volume of fresh air introduction lack coordinated control with the unit's operating status.

[0004] Existing technologies lack a control method that adaptively adjusts the fresh air volume based on fresh air parameters and unit operating parameters, making it impossible to achieve precise and efficient operation of air conditioning units while meeting human comfort requirements. Summary of the Invention

[0005] In view of this, in order to solve the above-mentioned technical problems or some of the technical problems, the embodiments of this application provide a fresh air conditioning method, device, air conditioning equipment and storage medium.

[0006] In a first aspect, embodiments of this application provide a method for regulating fresh air, including: Real-time collection of outdoor fresh air temperature and humidity data, as well as operating parameters of the indoor and outdoor units of the air conditioning system; Based on the temperature and humidity data and the operating parameters, determine whether the dew point temperature of the outdoor fresh air meets the first preset condition, and based on the operating parameters, determine whether the compressor of the air conditioning system meets the second preset condition; If both the first preset condition and the second preset condition are met, then it is determined whether the current indoor unit's operating fan speed and static pressure speed meet the fresh air introduction conditions. If the fresh air introduction conditions are met, fresh air introduction parameters are output to control the operation of the fresh air device of the air conditioning system according to the fresh air introduction parameters.

[0007] In one possible implementation, determining whether the dew point temperature of the outdoor fresh air meets a first preset condition based on the temperature and humidity data and the operating parameters includes: Calculate the dew point temperature of the current outdoor fresh air based on the temperature and humidity data; Identify the current operating mode of the indoor unit from the operating parameters; When the operating mode is cooling mode, if the dew point temperature is greater than the first target temperature, it is determined that the dew point temperature meets the first preset condition. The first target temperature is the sum of the set temperature of the heat exchanger of the indoor unit and the first temperature difference threshold corresponding to the cooling mode. When the operating mode is heating mode, if the dew point temperature is less than the second target temperature, it is determined that the dew point temperature meets the first preset condition. The second target temperature is the sum of the set temperature of the heat exchanger of the indoor unit and the second temperature difference threshold corresponding to the heating mode.

[0008] In one possible implementation, determining whether the compressor of the air conditioning system meets the second preset condition based on the operating parameters includes: Obtain the compressor's current operating frequency and current input power from the operating parameters; The current operating frequency is compared with a preset frequency full-load threshold, and the current input power is compared with a preset power full-load threshold; When the current operating frequency is less than the frequency full load threshold and the current input power is less than the power full load threshold, the continuous running time of the compressor is obtained, and it is determined whether the continuous running time exceeds the preset stable running time threshold. If the continuous running time exceeds the stable running time threshold, it is determined that the compressor is currently in a non-full load operating state, which meets the second preset condition.

[0009] In one possible implementation, determining whether the compressor of the air conditioning system meets the second preset condition based on the operating parameters includes: If the current operating frequency is greater than or equal to the frequency full load threshold, or the current input power is greater than or equal to the power full load threshold, determine whether the compressor is in a preset overload protection state. If the compressor is in an overload protection state, it is determined that the compressor is currently operating under overload or full load conditions, which does not meet the second preset condition; Alternatively, if the duration for which the current operating frequency is greater than or equal to the frequency full-load threshold is greater than a preset duration, and the duration for which the current input power is greater than or equal to the power full-load threshold is greater than a preset duration, then it is determined that the compressor is currently in an overload or full-load operating state, which does not meet the second preset condition.

[0010] In one possible implementation, determining whether the current operating fan speed and static pressure setting of the indoor unit meet the conditions for fresh air introduction includes: The operating parameters are obtained as follows: the current indoor unit's operating fan speed, the highest operating fan speed, the lowest operating fan speed, the current indoor unit's set static pressure level, the highest static pressure level, and the lowest static pressure level. When the operating fan speed is greater than the lowest operating fan speed and less than the highest operating fan speed, and the set static pressure is greater than the lowest static pressure and less than the highest static pressure, it is determined that the current operating fan speed and static pressure of the indoor unit are within the adjustable range, thus meeting the conditions for fresh air introduction. When the operating fan speed is equal to the lowest operating fan speed, or the operating fan speed is equal to the highest operating fan speed, or the set static pressure setting is equal to the lowest static pressure setting, or the set static pressure setting is equal to the highest static pressure setting, it is determined that the current indoor unit's operating fan speed and static pressure setting do not meet the fresh air introduction conditions.

[0011] In one possible implementation, the output of fresh air introduction parameters, to control the operation of the fresh air unit of the air conditioning system according to the fresh air introduction parameters, includes: Obtain the current operating time of the indoor unit from the operating parameters; The fresh air setting parameter is determined based on the operating air setting, wherein the fresh air setting parameter is less than or equal to the difference between the operating air setting and the preset setting, and the preset setting is an integer greater than or equal to one. The fresh air static pressure setting parameter is determined according to the set static pressure setting, wherein the fresh air static pressure setting parameter is less than or equal to the set static pressure setting. The fresh air introduction duration parameter is determined based on the runtime, wherein the fresh air introduction duration parameter is less than or equal to the runtime and greater than or equal to half of the runtime; The fresh air setting parameter, the fresh air static pressure setting parameter, and the fresh air introduction duration parameter are output to the fresh air device to control the fresh air device to introduce outdoor fresh air according to the air volume corresponding to the fresh air setting parameter, the static pressure corresponding to the fresh air static pressure setting parameter, and the duration corresponding to the fresh air introduction duration parameter.

[0012] In one possible implementation, where the air conditioning system includes multiple indoor units, the method further includes: Identify the number of indoor units that are currently powered on and have cooling or heating requirements from the operating parameters; When the number of indoor units is equal to one, the fresh air conditioning method according to any one of claims 1 to 5 shall be performed; When the number of indoor units is greater than one and less than or equal to the total number of all indoor units connected to the air conditioning system, the first indoor unit with the lowest operating fan speed and the second indoor unit with the lowest set static pressure are identified from all indoor units that are turned on and have cooling or heating requirements. The operating fan speed of the first indoor unit and the set static pressure speed of the second indoor unit are used as the reference operating parameters. If both the first preset condition and the second preset condition are met, the step of determining whether the current indoor unit's operating fan speed and static pressure speed meet the fresh air introduction conditions is executed based on the benchmark operating parameters.

[0013] Secondly, embodiments of this application provide a fresh air conditioning device, comprising: The data acquisition module is used to collect real-time temperature and humidity data of outdoor fresh air, as well as the operating parameters of the indoor and outdoor units of the air conditioning system. The first judgment module is used to determine whether the dew point temperature of the outdoor fresh air meets the first preset condition based on the temperature and humidity data and the operating parameters, and to determine whether the compressor of the air conditioning system meets the second preset condition based on the operating parameters. The second judgment module is used to determine whether the current indoor unit's operating fan speed and static pressure speed meet the fresh air introduction conditions if the first preset condition and the second preset condition are met simultaneously. The control module is used to output fresh air introduction parameters if the fresh air introduction conditions are met, so as to control the operation of the fresh air device of the air conditioning system according to the fresh air introduction parameters.

[0014] Thirdly, embodiments of this application provide an air conditioning device, including: a processor and a memory, wherein the processor is used to execute a fresh air conditioning program stored in the memory to implement the fresh air conditioning method described in any one of the first aspects above.

[0015] Fourthly, embodiments of this application provide a storage medium storing one or more programs, which can be executed by one or more processors to implement the fresh air conditioning method described in any of the first aspects above.

[0016] The fresh air regulation scheme provided in this application collects outdoor fresh air temperature and humidity data in real time, as well as the operating parameters of the indoor and outdoor units of the air conditioning system. Based on the temperature and humidity data and operating parameters, it determines whether the dew point temperature of the outdoor fresh air meets a first preset condition, and based on the operating parameters, it determines whether the compressor of the air conditioning system meets a second preset condition. If both the first and second preset conditions are met, it determines whether the current indoor unit's fan speed and static pressure setting meet the fresh air introduction conditions. If the fresh air introduction conditions are met, it outputs fresh air introduction parameters to control the operation of the air conditioning system's fresh air device. Therefore, by collecting outdoor fresh air temperature and humidity parameters and air conditioning system operating parameters in real time, and based on the dual judgment of dew point temperature and compressor load status, combined with the analysis of the adjustable range of the indoor unit's fan speed and static pressure setting, it achieves accurate identification of the timing of fresh air introduction and adaptive adjustment of the fresh air volume. While meeting the requirements of human comfort, it avoids the problem of excessive heat exchange load or insufficient cooling and heating capacity of the unit caused by excessive introduction of fresh air, significantly improves the operating efficiency and response speed of the energy-saving air conditioning system, and achieves precise, efficient and energy-saving operation control. Attached Figure Description

[0017] Figure 1 A schematic flowchart illustrating a fresh air conditioning method provided in an embodiment of this application; Figure 2 This is a schematic diagram of the structure of a fresh air conditioning device provided in an embodiment of this application; Figure 3 This is a schematic diagram of a fresh air conditioning system provided in an embodiment of this application; Figure 4 This is a schematic diagram of the structure of an air conditioning device provided in an embodiment of this application. Detailed Implementation

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

[0019] To facilitate understanding of the embodiments of this application, the following will provide further explanation and description with reference to the accompanying drawings and specific embodiments. These embodiments do not constitute a limitation on the embodiments of this application.

[0020] Figure 1 This is a flowchart illustrating a fresh air conditioning method provided in an embodiment of this application, as shown below. Figure 1 As shown, the method specifically includes: S11. Real-time collection of outdoor fresh air temperature and humidity data, as well as the operating parameters of the indoor and outdoor units of the air conditioning system.

[0021] The fresh air conditioning method provided in this application is applied to high-efficiency and energy-saving air conditioning equipment, including but not limited to multi-split air conditioning systems. The executing entity is the centralized controller of the air conditioning equipment or the main control board of the indoor unit. It is particularly suitable for enclosed or semi-enclosed spaces such as residences, office buildings, and shopping malls that require long-term air conditioning operation and have high requirements for indoor air quality. When the air conditioning system is running in cooling or heating mode, if it is necessary to introduce outdoor fresh air to improve indoor air quality, this application can automatically intervene to adjust, avoiding increased energy consumption and decreased comfort caused by manually opening windows or arbitrarily introducing fresh air. It is especially suitable for complex scenarios where multiple indoor units are configured in the same room and share a fresh air device, ensuring the coordination and safety of fresh air introduction when multiple units are running simultaneously.

[0022] In this embodiment, a temperature and humidity sensing and monitoring device is installed at the outdoor air inlet of the fresh air intake channel of the air conditioning system. This device includes a temperature sensor and a humidity sensor. The temperature sensor is used to sense the temperature of the outdoor fresh air in real time, and the humidity sensor is used to sense the relative humidity of the outdoor fresh air in real time. The temperature and humidity sensing and monitoring device is connected to the centralized controller or indoor unit main control board of the air conditioning system via a signal line, and transmits the collected temperature and humidity data to the data monitoring module in real time according to a preset sampling frequency (e.g., once every 10 seconds).

[0023] The data monitoring module establishes data connections with both the indoor unit control board and the outdoor unit control board via the air conditioning system's internal communication bus. The real-time operating parameters acquired from the indoor unit control board include at least: the current fan speed, the highest fan speed, the lowest fan speed, the set static pressure, the highest static pressure, the lowest static pressure, the set temperature of the heat exchanger, the current operating mode (cooling or heating), the unit's on / off status, and the current operating time. The outdoor unit control board acquires real-time load status parameters such as the compressor's current operating frequency, current input power, continuous operating time, and whether the compressor is under overload protection. The data monitoring module packages and stores all collected real-time data according to timestamps and transmits it in real-time to the operation analysis module for processing.

[0024] S12. Determine whether the dew point temperature of the outdoor fresh air meets the first preset condition based on temperature and humidity data and operating parameters, and determine whether the compressor of the air conditioning system meets the second preset condition based on operating parameters.

[0025] In this embodiment, the first preset condition is used to determine whether the dew point temperature of the outdoor fresh air will interfere with indoor heat exchange under the current indoor unit operating mode, so as to ensure that the introduced fresh air will not excessively affect the cooling or heating capacity of the air conditioning system. After receiving the temperature and humidity data of the outdoor fresh air, the operation analysis module calculates the current dew point temperature of the outdoor fresh air based on the conversion relationship between temperature, humidity and dew point temperature. The operation analysis module identifies the current operating mode of the indoor unit from the operating parameters and determines whether the dew point temperature is within the dew point temperature threshold range corresponding to the current operating mode. If so, it is determined that the first preset condition is met.

[0026] The second preset condition is used to determine whether the compressor is currently in a stable operating state that is neither fully loaded nor overloaded, to ensure that introducing fresh air will not increase the compressor's operating burden or affect system stability. When the compressor's current operating frequency is less than the preset frequency full-load threshold and the current input power is less than the preset power full-load threshold, it indicates that the compressor has not yet reached full-load operation. Simultaneously, if the compressor's continuous operating time exceeds the preset stable operating time threshold, it indicates that the compressor has entered a stable operating phase, rather than being in a newly started or unstable state. Furthermore, the compressor is not in an overload protection state, indicating that its current operating conditions are normal and there is no risk of abnormal overload. When all the above conditions are met, the compressor is determined to meet the second preset condition. In this case, introducing fresh air will not impose an additional burden on the compressor, nor will it affect the stable operation of the system.

[0027] In one possible implementation, determining whether the dew point temperature of the outdoor fresh air meets a first preset condition based on temperature and humidity data and operating parameters includes: The dew point temperature of the current outdoor fresh air is calculated based on temperature and humidity data; the current operating mode of the indoor unit is identified from the operating parameters; if the operating mode is cooling mode, and the dew point temperature is greater than the first target temperature, then the dew point temperature is determined to meet the first preset condition, where the first target temperature is the sum of the set temperature of the indoor unit's heat exchanger and the first temperature difference threshold corresponding to the cooling mode; if the operating mode is heating mode, and the dew point temperature is less than the second target temperature, then the dew point temperature is determined to meet the first preset condition, where the second target temperature is the sum of the set temperature of the indoor unit's heat exchanger and the second temperature difference threshold corresponding to the heating mode.

[0028] In this embodiment, the current outdoor fresh air dew point temperature is calculated based on the conversion relationship between temperature / humidity and dew point temperature. Specifically, the saturated vapor pressure is calculated based on the temperature value, the actual vapor pressure is calculated based on the humidity, and then the dew point temperature is calculated using the conversion formula between vapor pressure and dew point temperature.

[0029] The system identifies the current operating mode of the indoor unit from the operating parameters, which include cooling or heating modes. It also retrieves the set temperature of the indoor unit's heat exchanger from these parameters. The set temperature of the indoor unit's heat exchanger refers to the target temperature value of the evaporator (in cooling mode) or condenser (in heating mode) coil. This temperature is calculated by the air conditioning system based on parameters such as the user-set indoor ambient temperature, the indoor unit's operating mode, and the fan speed setting. It serves as the reference value for controlling the compressor's operating frequency and the electronic expansion valve's opening. In cooling mode, the set temperature is typically lower than the indoor ambient temperature to ensure cooling efficiency; in heating mode, it is typically higher than the indoor ambient temperature to ensure heating efficiency. This temperature value is updated in real time and stored in the indoor unit's control board. The operation analysis module can directly obtain this temperature value from the operating parameters via the internal communication bus.

[0030] When the current operating mode is detected as cooling mode, the operation analysis module obtains the first temperature difference threshold corresponding to the pre-stored cooling mode and calculates the first target temperature, which is the sum of the indoor unit's heat exchanger set temperature and the first temperature difference threshold. The operation analysis module compares the calculated outdoor fresh air dew point temperature with the first target temperature. If the dew point temperature is greater than the first target temperature, it is determined that the outdoor fresh air dew point temperature meets the first preset condition. If the dew point temperature is less than or equal to the first target temperature, it is determined that the first preset condition is not met, and subsequent steps are not performed.

[0031] When the current operating mode is identified as heating mode, the operation analysis module retrieves the second temperature difference threshold corresponding to the pre-stored heating mode and calculates the second target temperature, which is the sum of the indoor unit's heat exchanger set temperature and the second temperature difference threshold. The operation analysis module compares the calculated outdoor fresh air dew point temperature with the second target temperature. If the dew point temperature is lower than the second target temperature, it is determined that the outdoor fresh air dew point temperature meets the first preset condition. The first temperature difference threshold can be equal to the second temperature difference threshold. If the dew point temperature is greater than or equal to the second target temperature, it is determined that the first preset condition is not met, and subsequent steps are not performed.

[0032] For example, the current dew point temperature (DPf) of the air is used to determine the operating mode of the indoor unit. If the indoor unit is in cooling mode, and the dew point temperature (DPf) is greater than the set temperature of the indoor unit's heat exchanger plus 2°C (the first temperature difference threshold), then the first preset condition is met. Alternatively, if the indoor unit is in heating mode, and the dew point temperature (DPf) is less than the set temperature of the indoor unit's heat exchanger plus 2°C (the second temperature difference threshold), then the first preset condition is met.

[0033] In one possible implementation, determining whether the compressor of the air conditioning system meets the second preset condition based on operating parameters includes: The compressor's current operating frequency and current input power are obtained from the operating parameters; the current operating frequency is compared with a preset frequency full-load threshold, and the current input power is compared with a preset power full-load threshold; when the current operating frequency is less than the frequency full-load threshold and the current input power is less than the power full-load threshold, the compressor's continuous running time is obtained, and it is determined whether the continuous running time exceeds a preset stable running time threshold; if the continuous running time exceeds the stable running time threshold, it is determined that the compressor is currently in a non-full-load operating state, which meets the second preset condition.

[0034] In this embodiment, the current operating frequency and current input power of the compressor are obtained from the outdoor unit control board via the internal communication bus of the air conditioning system. The current operating frequency reflects the real-time speed of the compressor rotor, and the current input power reflects the current energy consumption level of the compressor. Pre-stored frequency full-load thresholds and power full-load thresholds are read from the memory. The frequency full-load threshold is the highest frequency value at which the compressor can operate stably for a long period under rated operating conditions, and the power full-load threshold is the maximum input power value corresponding to the compressor under rated operating conditions. The operation analysis module compares the obtained current operating frequency with the frequency full-load threshold, and simultaneously compares the current input power with the power full-load threshold.

[0035] When the comparison result shows that the current operating frequency is less than the frequency full-load threshold and the current input power is less than the power full-load threshold, the continuous running time of the compressor is further obtained from the outdoor unit control board. The continuous running time is the cumulative value of the compressor's continuous running time since this start-up. The pre-stored stable running time threshold is read from the memory. The stable running time threshold is pre-calibrated according to the compressor's start-up characteristics, with a typical value of 3 to 5 minutes, to ensure that the compressor has passed the unstable stage of the initial start-up.

[0036] The obtained continuous runtime is compared with the stable runtime threshold. If the continuous runtime exceeds the stable runtime threshold, the compressor is determined to be in a normal, non-full-load, and stable operating state, meeting the second preset condition. If the continuous runtime does not exceed the stable runtime threshold, the compressor is determined to be in an unstable state at the initial startup stage, not meeting the second preset condition, and the fresh air introduction process is paused or awaits the next judgment cycle.

[0037] In one possible implementation, determining whether the compressor of the air conditioning system meets the second preset condition based on operating parameters includes: If the current operating frequency is greater than or equal to the frequency full load threshold, or the current input power is greater than or equal to the power full load threshold, determine whether the compressor is in a preset overload protection state. If the compressor is in an overload protection state, it is determined that the compressor is currently in an overload or full load operating state, which does not meet the second preset condition. Alternatively, if the duration of the current operating frequency being greater than or equal to the frequency full load threshold is greater than the preset duration, and the duration of the current input power being greater than or equal to the power full load threshold is greater than the preset duration, it is determined that the compressor is currently in an overload or full load operating state, which does not meet the second preset condition.

[0038] In this embodiment, when the operation analysis module finds that the current operating frequency is greater than or equal to the frequency full-load threshold, or the current input power is greater than or equal to the power full-load threshold, it further reads the protection status register in the outdoor unit control board through the internal communication bus to obtain whether the compressor is in a preset overload protection state. The overload protection state is a protection indicator automatically triggered by the outdoor unit control board when it detects abnormal operating conditions such as excessively high compressor exhaust temperature, excessively high operating current, or excessively high system pressure.

[0039] If the overload protection status is detected as triggered, the compressor is directly determined to be operating under overload or full load conditions, which does not meet the second preset condition. If the overload protection status is detected as not triggered, the duration for which the current operating frequency is greater than or equal to the frequency full load threshold and the duration for which the current input power is greater than or equal to the power full load threshold are further obtained. A preset overload determination duration threshold is read from the memory. The overload determination duration threshold is pre-calibrated based on the compressor's heat capacity and overload tolerance, typically ranging from 10 to 15 minutes. When the duration for which the current operating frequency is greater than or equal to the frequency full load threshold exceeds the preset overload determination duration threshold, and the duration for which the current input power is greater than or equal to the power full load threshold also exceeds the preset overload determination duration threshold, the compressor is determined to be operating under continuous full load or overload conditions, which does not meet the second preset condition. If either of the above durations does not exceed the preset overload determination duration threshold, the operation analysis module does not make a determination and waits for the next determination cycle to continue monitoring.

[0040] S13. If the first preset condition and the second preset condition are met at the same time, determine whether the current indoor unit's operating fan speed and static pressure speed meet the fresh air introduction conditions.

[0041] In this embodiment, the operating fan speed setting refers to the fan speed setting of the indoor unit during its current operation, used to characterize the amount of air circulating in the indoor unit. The set static pressure setting refers to the outlet static pressure setting of the indoor unit under the current installation environment to overcome duct resistance, used to characterize the amount of air outlet pressure of the indoor unit.

[0042] When the operation analysis module determines that the dew point temperature of the outdoor fresh air meets the first preset condition and the compressor meets the second preset condition, it obtains the current operating fan speed and set static pressure speed of the indoor unit from the indoor unit control board via the internal communication bus. Simultaneously, it obtains the critical speed values ​​of the indoor unit within the fan speed adjustment range and static pressure adjustment range. The operation analysis module compares the current operating fan speed with the upper and lower limits of the fan speed adjustment range, and also compares the current set static pressure speed with the upper and lower limits of the static pressure adjustment range.

[0043] When the current operating fan speed is within the fan speed adjustment range and the current set static pressure speed is within the static pressure adjustment range, the operation analysis module determines that the current operating fan speed and static pressure speed of the indoor unit meet the conditions for fresh air introduction.

[0044] When the current operating fan speed is at the boundary of the fan speed adjustment range, or the current set static pressure speed is at the boundary of the static pressure adjustment range, the operation analysis module determines that the current operating fan speed and static pressure speed of the indoor unit do not meet the conditions for fresh air introduction.

[0045] In one possible implementation, determining whether the current operating fan speed and static pressure setting of the indoor unit meet the conditions for fresh air introduction includes: The system retrieves the current indoor unit's operating fan speed, maximum operating fan speed, minimum operating fan speed, set static pressure level, maximum static pressure level, and minimum static pressure level from the operating parameters. When the operating fan speed is greater than the minimum operating fan speed and less than the maximum operating fan speed, and the set static pressure level is greater than the minimum static pressure level and less than the maximum static pressure level, it is determined that the current indoor unit's operating fan speed and static pressure level are within the adjustable range, meeting the fresh air introduction conditions. When the operating fan speed is equal to the minimum operating fan speed, or the operating fan speed is equal to the maximum operating fan speed, or the set static pressure level is equal to the minimum static pressure level, or the set static pressure level is equal to the maximum static pressure level, it is determined that the current indoor unit's operating fan speed and static pressure level do not meet the fresh air introduction conditions.

[0046] In this embodiment, the operation analysis module obtains the current indoor unit's operating fan speed, the highest operating fan speed, the lowest operating fan speed, the current indoor unit's set static pressure level, the highest static pressure level, and the lowest static pressure level from the indoor unit control board via the internal communication bus.

[0047] The obtained operating fan speed is compared with the lowest and highest operating fan speeds, and the obtained set static pressure is also compared with the lowest and highest static pressure levels. When the comparison results satisfy the condition that the operating fan speed is greater than the lowest operating fan speed but less than the highest operating fan speed, and the set static pressure is greater than the lowest static pressure but less than the highest static pressure, the indoor unit's operating fan speed and static pressure are determined to be within the adjustable range, meeting the conditions for fresh air introduction. This determination indicates that the indoor unit has the margin to adjust the fan speed and static pressure upwards or downwards in the current operating state, and stable operation can be maintained through fine-tuning after fresh air is introduced.

[0048] If the comparison results show any of the following: the operating fan speed is equal to the lowest operating fan speed, the operating fan speed is equal to the highest operating fan speed, the set static pressure setting is equal to the lowest static pressure setting, or the set static pressure setting is equal to the highest static pressure setting, then the current indoor unit's operating fan speed and static pressure setting are determined to be within the boundary range, and the conditions for introducing fresh air are not met. This determination indicates that the indoor unit has no adjustment margin in the current operating state, and introducing fresh air may lead to operational imbalance or exceed the equipment's capacity range.

[0049] S14. If the fresh air introduction conditions are met, output the fresh air introduction parameters to control the operation of the fresh air device of the air conditioning system according to the fresh air introduction parameters.

[0050] In this embodiment, when the operation analysis module determines that the current indoor unit's operating fan speed and static pressure level meet the fresh air introduction conditions, the operation analysis module obtains the current unit's start-up time from the indoor unit control board via the internal communication bus. Based on the current indoor unit's operating fan speed, the fresh air speed parameter is determined and set to a value lower than the current operating fan speed, and the airflow corresponding to the fresh air speed parameter is lower than the indoor unit's current circulating airflow. Based on the current indoor unit's set static pressure level, the fresh air static pressure parameter is determined and set to a value less than or equal to the currently set static pressure level.

[0051] The operation analysis module determines the fresh air introduction duration parameter based on the current unit's operating time. This parameter is set to a value that is less than or equal to the current unit's operating time and greater than or equal to half of the current unit's operating time. The determined fresh air speed parameter, fresh air static pressure parameter, and fresh air introduction duration parameter are combined to generate a fresh air introduction control command. This command is then output to the control port of the fresh air unit via the communication bus to control the operation of the air conditioning system's fresh air unit.

[0052] In one possible implementation, the current operating time of the indoor unit is obtained from the operating parameters; a fresh air level parameter is determined based on the operating fan speed, wherein the fresh air level parameter is less than or equal to the difference between the operating fan speed and a preset speed, and the preset speed is an integer greater than or equal to one; a fresh air static pressure level parameter is determined based on the set static pressure level, wherein the fresh air static pressure level parameter is less than or equal to the set static pressure level; a fresh air introduction duration parameter is determined based on the operating time, wherein the fresh air introduction duration parameter is less than or equal to the operating time and greater than or equal to half of the operating time; the fresh air level parameter, the fresh air static pressure level parameter, and the fresh air introduction duration parameter are output to the fresh air device to control the fresh air device to introduce outdoor fresh air according to the air volume corresponding to the fresh air level parameter, the static pressure corresponding to the fresh air static pressure level parameter, and the duration corresponding to the fresh air introduction duration parameter.

[0053] In this embodiment, when the operation analysis module determines that the current indoor unit's operating fan speed and static pressure speed meet the fresh air introduction conditions, the operation analysis module obtains the current indoor unit's running time from the indoor unit control board through the internal communication bus. The running time is the cumulative time value of the indoor unit's continuous operation after this startup.

[0054] The operation analysis module determines the fresh air setting parameter based on the current operating fan speed of the indoor unit. Specifically, the module reads a preset setting from memory, which is an integer greater than or equal to one (a specific numerical value), typically 1. The module calculates the difference between the operating fan speed and the preset setting and sets the fresh air setting parameter to a value less than or equal to this difference. For example, when the operating fan speed is 3 and the preset setting is 1, the fresh air setting parameter is set to a value less than or equal to 2 to ensure that the introduced fresh air volume is lower than the current circulating air volume of the indoor unit, avoiding excessive impact on the indoor temperature field.

[0055] The operation analysis module determines the fresh air static pressure setting parameter based on the current set static pressure setting of the indoor unit. Specifically, the operation analysis module sets the fresh air static pressure setting parameter to be less than or equal to the currently set static pressure setting value to ensure that the outlet air pressure when fresh air is introduced does not exceed the currently set duct resistance capacity of the indoor unit, thus avoiding duct leakage or increased noise due to excessive static pressure.

[0056] The operation analysis module determines the fresh air introduction duration parameter based on the current operating time of the indoor unit. Specifically, the operation analysis module calculates half of the operating time and sets the fresh air introduction duration parameter to a value that is less than or equal to the operating time and greater than or equal to half of the operating time. For example, when the operating time is 60 minutes, the fresh air introduction duration parameter is set to a value between 30 and 60 minutes to ensure that the fresh air introduction time matches the existing operating time of the indoor unit, avoiding the introduction of fresh air when the indoor unit is just started or when the indoor unit is about to shut down, which would result in insufficient fresh air exchange.

[0057] The operation analysis module combines the determined fresh air speed parameters, fresh air static pressure parameters, and fresh air introduction duration parameters to generate a fresh air introduction control command, and outputs the fresh air introduction control command to the control port of the fresh air device through the communication bus.

[0058] After receiving the fresh air introduction control command, the fresh air unit starts the fan and operates at the speed corresponding to the fresh air setting parameter to introduce the corresponding volume of outdoor fresh air. Simultaneously, it adjusts the opening of the air valve to match the static pressure requirements corresponding to the fresh air static pressure setting parameter. It then operates for the duration corresponding to the fresh air introduction duration parameter, automatically shutting off or switching back to standby mode after the set duration is reached. The introduced outdoor fresh air is delivered into the room through the fresh air introduction duct, mixes with the indoor return air, and then undergoes heat exchange through the indoor unit's evaporator, replenishing fresh air while meeting human comfort requirements.

[0059] In one possible implementation, where the air conditioning system includes multiple indoor units, the method further includes: The system identifies the number of indoor units currently in operation and requiring cooling or heating from the operating parameters; if the number of indoor units is one, it executes the fresh air conditioning method of any one of claims 1 to 5; if the number of indoor units is greater than one and less than or equal to the total number of indoor units connected to the air conditioning system, it identifies the first indoor unit with the lowest operating fan speed and the second indoor unit with the lowest set static pressure from all indoor units currently in operation and requiring cooling or heating; it uses the operating fan speed of the first indoor unit and the set static pressure of the second indoor unit as reference operating parameters; if both the first and second preset conditions are met, it performs a step of determining whether the current operating fan speed and static pressure of the indoor unit meet the fresh air introduction conditions based on the reference operating parameters.

[0060] In this embodiment, the operation analysis module establishes a data connection with all indoor unit control boards through an internal communication bus, identifies indoor units that are currently powered on and have cooling or heating needs from the operating parameters of each indoor unit, and counts their number. When the number of identified indoor units is equal to one, the subsequent fresh air introduction judgment and control process is executed according to the control logic of a single indoor unit, based on the indoor unit's own operating fan speed and set static pressure level.

[0061] When the number of identified indoor units is greater than one and less than or equal to the total number of indoor units connected to the air conditioning system, the system iterates through all indoor units that are powered on and have cooling or heating requirements, reading the operating fan speed and set static pressure level of each unit. The operation analysis module compares these values ​​to identify the indoor unit with the lowest operating fan speed, designating it as the first indoor unit; simultaneously, it identifies the indoor unit with the lowest set static pressure level, designating it as the second indoor unit. It should be noted that the first and second indoor units can be the same unit or different units.

[0062] The operating fan speed of the first indoor unit and the set static pressure level of the second indoor unit are jointly determined as the baseline operating parameters for multi-unit operation scenarios. These baseline operating parameters represent the two extreme values ​​that are most sensitive to the introduction of fresh air among all currently operating indoor units. The lowest fan speed indicates that the indoor unit has the smallest circulating air volume and the weakest ability to withstand increased air volume; the lowest static pressure level indicates that the indoor unit has the smallest duct resistance and the weakest ability to withstand increased static pressure.

[0063] Assuming the operation analysis module has determined that the outdoor fresh air dew point temperature meets the first preset condition and the compressor meets the second preset condition, the operation analysis module, based on the aforementioned determined baseline operating parameters, executes a judgment step to determine whether the indoor unit's operating fan speed and static pressure setting meet the fresh air introduction conditions. Specifically, the operation analysis module uses the operating fan speed in the baseline operating parameters as the current operating fan speed and the set static pressure setting in the baseline operating parameters as the current set static pressure setting. It also obtains the upper and lower limits of the fan speed adjustment range and the upper and lower limits of the static pressure adjustment range corresponding to the indoor unit model, and determines whether the fresh air introduction conditions are met according to the predetermined setting range judgment logic.

[0064] When the operating wind speed in the reference operating parameters is within the wind speed adjustment range and the set static pressure speed in the reference operating parameters is within the static pressure adjustment range, the operation analysis module determines that the current multi-unit operation scenario meets the fresh air introduction conditions and executes step S14; otherwise, it determines that the fresh air introduction conditions are not met.

[0065] The fresh air regulation method provided in this embodiment constructs a multi-level adaptive fresh air regulation mechanism based on dew point temperature judgment, compressor load status judgment, and indoor unit windshield static pressure range judgment by real-time collection of outdoor fresh air temperature and humidity parameters and air conditioning system operating parameters. Under cooling or heating conditions, a first preset condition ensures that the dew point temperature of the introduced fresh air will not significantly interfere with indoor heat exchange; a second preset condition ensures that the compressor is in a non-full-load and stable operating state, avoiding increased system burden due to the introduction of fresh air; and the windshield static pressure range judgment ensures that the indoor unit has adjustment margin to maintain stable operation. The three mechanisms work together to achieve accurate identification of the timing of fresh air introduction and adaptive adjustment of the fresh air volume. While meeting human comfort requirements, this method effectively avoids problems such as excessive heat exchange load and insufficient cooling / heating capacity caused by excessive introduction of high-temperature or low-temperature fresh air, significantly improving the operating efficiency and response speed of the air conditioning system. Meanwhile, by employing a control strategy based on the lowest wind speed and lowest static pressure in multi-unit scenarios, it ensures that multiple indoor units sharing a fresh air system can maintain stable operation after the introduction of fresh air, avoiding operational imbalances in some indoor units due to the introduction of fresh air. Overall, this achieves precise, efficient, energy-saving, and stable operation control of the air conditioning system.

[0066] As an example, for a system with only one indoor unit in a room, the control would be as follows: Step 1: Collect the temperature and humidity of the outdoor fresh air; Step 2-1: Monitor the temperature and humidity of the outdoor fresh air; Step 2-2: Monitor the operating parameters of the indoor and outdoor units; Step 3-0 identifies the current operating mode (cooling / heating) of the indoor unit, and the running time of the indoor unit is recorded as Tn. When Tn ≥ n (n is a set value, and Tn is calculated from 0 after each fresh air is introduced), the current operating mode is cooling mode, and proceed to Step 3-1; if the current operating mode is heating mode, proceed to Step 3-2. Step 3-1-1 Determine that the outdoor fresh air dew point temperature DPf is greater than the indoor unit heat exchanger set temperature + 2℃. Step 3-1-2 Determine whether the current press is not under overload or full load operation; Step 3-1-3 If both Step 3-1-1 and Step 3-1-2 are satisfied, proceed to Step 4; Step 3-2-1 Determine that the dew point temperature DPf of the outdoor fresh air is less than the set temperature of the indoor unit heat exchanger + 2℃. Step 3-2-2 Determine whether the current press is not under overload or full load operation; Step 3-2-3: If both Step 3-2-1 and Step 3-2-2 are satisfied, proceed to Step 4. Step 4-0: Determine the current indoor unit's operating fan speed and static pressure level. Mark the current indoor unit's operating fan speed as Pn, the highest operating fan speed as Ph, and the lowest operating fan speed as Pl. Determine the current indoor unit's set static pressure level as Sn, the highest static pressure level as Sh, and the lowest static pressure level as Sl. Determine the current operating time of the indoor unit and mark it as Tn.

[0067] Step 4-1 When Pl < Pn < Ph and Sl < Sn < Sh, fresh air can be introduced. The fresh air damper Pf ≤ Pn-x (x is a set value, x ≥ 1), the static pressure damper Sf ≤ Sn, and the fresh air introduction time 1 / 2 Tn ≤ Tf ≤ Tn.

[0068] Fresh air cannot be introduced when Pl=Pn or Pn=Ph or Sl=Sn or Sn=Sh.

[0069] As another example, for a system with multiple indoor units in a room, the control is as follows: Step 1: Collect the temperature and humidity of the outdoor fresh air; Step 2-1: Monitor the temperature and humidity of the outdoor fresh air; Step 2-2: Monitor the operating parameters of the indoor and outdoor units; Step 3-0 identifies the number of indoor units currently in operation (referring to indoor units with cooling or heating capacity requirements), denoted as X (all indoor units in the room are denoted as Xt), identifies the current operating mode of the indoor unit (cooling / heating), and denotes the running time of the indoor unit as Tn.

[0070] When X=1, when Tn≥n (n is a set value, Tn is calculated from 0 after each fresh air is introduced), the current operating mode is cooling mode, proceed to Step3-1, the current operating mode is heating mode, proceed to Step3-2.

[0071] When X≠1, proceed to Step3-0-1 to run the analysis module; Step 3-0-1: When 1 < X ≤ Xt, the running time of any indoor unit is denoted as Txn. The maximum running time of the indoor unit is denoted as Txn max. When Txn max ≥ n (n is a set value, set to start calculating from 0 after each fresh air introduction). If the current operating mode is cooling mode, proceed to Step 3-1; if the current operating mode is heating mode, proceed to Step 3-2. Step 3-1-1 Determine that the outdoor fresh air dew point temperature DPf is greater than the indoor unit heat exchanger set temperature + 2℃. Step 3-1-2 Determine whether the current press is not under overload or full load operation; Step 3-1-3 If both Step 3-1-1 and Step 3-1-2 are satisfied, proceed to Step 4; Step 3-2-1 Determine that the dew point temperature DPf of the outdoor fresh air is less than the set temperature of the indoor unit heat exchanger + 2℃. Step 3-2-2 Determine whether the current press is not under overload or full load operation; Step 3-2-3: If both Step 3-2-1 and Step 3-2-2 are satisfied, proceed to Step 4. Step 4-0: Determine the current indoor unit's fan speed and static pressure setting. Mark the current fan speed as Pn, the highest setting as Ph, and the lowest setting as Pl. Determine the current static pressure setting as Sn, the highest static pressure setting as Sh, and the lowest static pressure setting as Sl. Determine the current operating time of the indoor unit and mark it as Tn.

[0072] Step 4-1 When X=1, when Pl<Pn<Ph, when Sl<Sn<Sh, fresh air can be introduced. The fresh air setting Pf≤Pn-x (x is a set value, x≥1), the fresh air static pressure setting Sf≤Sn, and the fresh air introduction time 1 / 2 Tn≤Tf≤Tn.

[0073] When Pn=Ph and Sn=Sh, fresh air can be introduced. The fresh air setting is Pf=P1, the fresh air static pressure setting is Sf=S1, and the fresh air introduction time is 1 / 2 Tn≤Tf≤Tn.

[0074] Step 4-2 When 1 < X ≤ Xt, find the unit with the lowest operating fan speed Pn and static pressure speed Sn among the currently operating indoor units, and mark them as Pn min and Sn min.

[0075] When Pl < Pn min ≤ Ph, and when Sl < Sn min ≤ Sh, fresh air can be introduced. The fresh air setting is Pf = Pn min, the fresh air static pressure setting is Sf = Sn, and the fresh air introduction time is 1 / 2 Tn ≤ Tf ≤ Tn.

[0076] Fresh air cannot be introduced when Pl=Pn or Pn=Ph, or Sl=Sn or Sn=Sh.

[0077] Figure 2 This is a schematic diagram of the structure of a fresh air conditioning device provided in an embodiment of this application, as shown below. Figure 2 As shown, the device specifically includes: The data acquisition module 21 is used to collect the temperature and humidity data of the outdoor fresh air in real time, as well as the operating parameters of the indoor and outdoor units of the air conditioning system. The first judgment module 22 is used to determine whether the dew point temperature of the outdoor fresh air meets the first preset condition based on the temperature and humidity data and the operating parameters, and to determine whether the compressor of the air conditioning system meets the second preset condition based on the operating parameters. The second judgment module 23 is used to determine whether the current indoor unit's operating fan speed and static pressure speed meet the fresh air introduction conditions if the first preset condition and the second preset condition are met simultaneously. The control module 24 is used to output fresh air introduction parameters if the fresh air introduction conditions are met, so as to control the operation of the fresh air device of the air conditioning system according to the fresh air introduction parameters.

[0078] In one possible implementation, the first determination module is specifically used to calculate the dew point temperature of the current outdoor fresh air based on the temperature and humidity data; Identify the current operating mode of the indoor unit from the operating parameters; When the operating mode is cooling mode, if the dew point temperature is greater than the first target temperature, it is determined that the dew point temperature meets the first preset condition. The first target temperature is the sum of the set temperature of the heat exchanger of the indoor unit and the first temperature difference threshold corresponding to the cooling mode. When the operating mode is heating mode, if the dew point temperature is less than the second target temperature, it is determined that the dew point temperature meets the first preset condition. The second target temperature is the sum of the set temperature of the heat exchanger of the indoor unit and the second temperature difference threshold corresponding to the heating mode.

[0079] In one possible implementation, the first determining module is specifically used to obtain the compressor's current operating frequency and current input power from the operating parameters; The current operating frequency is compared with a preset frequency full-load threshold, and the current input power is compared with a preset power full-load threshold; When the current operating frequency is less than the frequency full load threshold and the current input power is less than the power full load threshold, the continuous running time of the compressor is obtained, and it is determined whether the continuous running time exceeds the preset stable running time threshold. If the continuous running time exceeds the stable running time threshold, it is determined that the compressor is currently in a non-full load operating state, which meets the second preset condition.

[0080] In one possible implementation, the first determining module is specifically used to determine whether the compressor is in a preset overload protection state when the current operating frequency is greater than or equal to the frequency full load threshold, or the current input power is greater than or equal to the power full load threshold. If the compressor is in an overload protection state, it is determined that the compressor is currently operating under overload or full load conditions, which does not meet the second preset condition; Alternatively, if the duration for which the current operating frequency is greater than or equal to the frequency full-load threshold is greater than a preset duration, and the duration for which the current input power is greater than or equal to the power full-load threshold is greater than a preset duration, then it is determined that the compressor is currently in an overload or full-load operating state, which does not meet the second preset condition.

[0081] In one possible implementation, the second determination module is specifically used to obtain the current indoor unit's operating fan speed, the indoor unit's highest operating fan speed, the indoor unit's lowest operating fan speed, and the current indoor unit's set static pressure level, the indoor unit's highest static pressure level, and the indoor unit's lowest static pressure level from the operating parameters. When the operating fan speed is greater than the lowest operating fan speed and less than the highest operating fan speed, and the set static pressure is greater than the lowest static pressure and less than the highest static pressure, it is determined that the current operating fan speed and static pressure of the indoor unit are within the adjustable range, thus meeting the conditions for fresh air introduction. When the operating fan speed is equal to the lowest operating fan speed, or the operating fan speed is equal to the highest operating fan speed, or the set static pressure setting is equal to the lowest static pressure setting, or the set static pressure setting is equal to the highest static pressure setting, it is determined that the current indoor unit's operating fan speed and static pressure setting do not meet the fresh air introduction conditions.

[0082] In one possible implementation, the control module is specifically used to obtain the current operating time of the indoor unit from the operating parameters; The fresh air setting parameter is determined based on the operating air setting, wherein the fresh air setting parameter is less than or equal to the difference between the operating air setting and the preset setting, and the preset setting is an integer greater than or equal to one. The fresh air static pressure setting parameter is determined according to the set static pressure setting, wherein the fresh air static pressure setting parameter is less than or equal to the set static pressure setting. The fresh air introduction duration parameter is determined based on the runtime, wherein the fresh air introduction duration parameter is less than or equal to the runtime and greater than or equal to half of the runtime; The fresh air setting parameter, the fresh air static pressure setting parameter, and the fresh air introduction duration parameter are output to the fresh air device to control the fresh air device to introduce outdoor fresh air according to the air volume corresponding to the fresh air setting parameter, the static pressure corresponding to the fresh air static pressure setting parameter, and the duration corresponding to the fresh air introduction duration parameter.

[0083] In one possible implementation, the control module is further configured to identify from the operating parameters the number of indoor units that are currently powered on and have cooling or heating requirements. When the number of indoor units is equal to one, the fresh air conditioning method according to any one of claims 1 to 5 shall be performed; When the number of indoor units is greater than one and less than or equal to the total number of all indoor units connected to the air conditioning system, the first indoor unit with the lowest operating fan speed and the second indoor unit with the lowest set static pressure are identified from all indoor units that are turned on and have cooling or heating requirements. The operating fan speed of the first indoor unit and the set static pressure speed of the second indoor unit are used as the reference operating parameters. If both the first preset condition and the second preset condition are met, the step of determining whether the current indoor unit's operating fan speed and static pressure speed meet the fresh air introduction conditions is executed based on the benchmark operating parameters.

[0084] The air conditioning device provided in this embodiment can be as follows: Figure 2 The apparatus shown can perform, as Figure 1 All steps of the method, thus achieving Figure 1 For details on the technical effects of the method shown, please refer to [link / reference]. Figure 1 The relevant descriptions are presented concisely and will not be elaborated upon here.

[0085] Figure 3 This is a schematic diagram of a fresh air conditioning system provided in an embodiment of this application. The left side of the diagram shows the outdoor side, which includes one outdoor unit. The outdoor unit is connected to multiple indoor units on the indoor side via refrigerant piping. The right side of the diagram shows the indoor side, which includes one or more indoor units. Each indoor unit is equipped with a return air inlet and a fresh air inlet. The return air inlet of the indoor unit is connected to the indoor space and is used to draw in indoor return air. The fresh air inlet of the indoor unit is connected to the outside through a fresh air introduction channel and is used to introduce outdoor fresh air. A temperature and humidity sensing and monitoring device is installed at the outdoor air inlet of the fresh air introduction channel. This device includes a temperature sensor and a humidity sensor and is used to collect the temperature and humidity data of the outdoor fresh air in real time.

[0086] The indoor unit contains an evaporator (in cooling mode) and a fan. Return air and fresh air mix inside the indoor unit or in a mixing chamber, then flow through the evaporator for heat exchange before being delivered into the indoor space through the air outlet. The diagram also shows the control system connections: the temperature and humidity sensor is connected to the central controller or the indoor unit's main control board via a signal line; the central controller or indoor unit's main control board is connected to the control ports of the indoor unit, outdoor unit, and fresh air unit, forming a complete link for data acquisition and control command transmission. The entire system achieves a closed-loop function of real-time monitoring of outdoor fresh air temperature and humidity, acquisition of air conditioning operating parameters, logical judgment, and coordinated control of the fresh air unit.

[0087] The air conditioning system provided in this embodiment can be as follows: Figure 3 The system shown can perform, for example Figure 1 All steps of the method, thus achieving Figure 1 For details on the technical effects of the method shown, please refer to [link / reference]. Figure 1 The relevant descriptions are presented concisely and will not be elaborated upon here.

[0088] Figure 4 This is a schematic diagram of the structure of an air conditioning device provided in an embodiment of this application. Figure 4 The air conditioning device 400 shown includes at least one processor 401, a memory 402, at least one network interface 404, and other user interfaces 403. The various components in the air conditioning device 400 are coupled together via a bus system 405. It is understood that the bus system 405 is used to implement communication between these components. In addition to a data bus, the bus system 405 also includes a power bus, a control bus, and a status signal bus. However, for clarity, ... Figure 4 The general designated all buses as Bus System 405.

[0089] The user interface 403 may include a display, keyboard, or clicking device (e.g., mouse, trackball, touchpad, or touchscreen).

[0090] It is understood that the memory 402 in the embodiments of this application can be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. The non-volatile memory can be read-only memory (ROM), programmable read-only memory (PROM), erasable programmable read-only memory (EPROM), electrically erasable programmable read-only memory (EEPROM), or flash memory. The volatile memory can be random access memory (RAM), which is used as an external cache. By way of example, but not limitation, many forms of RAM are available, such as Static Random Access Memory (SRAM), Dynamic Random Access Memory (DRAM), Synchronous DRAM (SDRAM), Double Data Rate Synchronous DRAM (DDRSDRAM), Enhanced Synchronous DRAM (ESDRAM), Synchronous Link DRAM (SLDRAM), and Direct Rambus RAM (DRRAM). The memory 402 described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0091] In some implementations, memory 402 stores elements, executable units or data structures, or subsets thereof, or extended sets thereof: operating system 4021 and application program 4022.

[0092] The operating system 4021 includes various system programs, such as the framework layer, core library layer, and driver layer, used to implement various basic business functions and handle hardware-based tasks. The application program 4022 includes various applications, such as a media player and a browser, used to implement various application functions. Programs implementing the methods of this application embodiment can be included in application program 4022.

[0093] In this embodiment, by calling the program or instructions stored in memory 402, specifically the program or instructions stored in application program 4022, processor 401 executes the method steps provided in each method embodiment, including, for example: Real-time collection of outdoor fresh air temperature and humidity data, as well as operating parameters of the indoor and outdoor units of the air conditioning system; Based on the temperature and humidity data and the operating parameters, determine whether the dew point temperature of the outdoor fresh air meets the first preset condition, and based on the operating parameters, determine whether the compressor of the air conditioning system meets the second preset condition; If both the first preset condition and the second preset condition are met, then it is determined whether the current indoor unit's operating fan speed and static pressure speed meet the fresh air introduction conditions. If the fresh air introduction conditions are met, fresh air introduction parameters are output to control the operation of the fresh air device of the air conditioning system according to the fresh air introduction parameters.

[0094] The methods disclosed in the embodiments of this application can be applied to processor 401, or implemented by processor 401. Processor 401 may be an integrated circuit chip with signal processing capabilities. In the implementation process, each step of the above method can be completed by the integrated logic circuit of the hardware in processor 401 or by instructions in the form of software. The processor 401 may be a general-purpose processor, a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, or discrete hardware components. It can implement or execute the methods, steps, and logic block diagrams disclosed in the embodiments of this application. The general-purpose processor may be a microprocessor or any conventional processor. The steps of the methods disclosed in the embodiments of this application can be directly embodied in the execution of a hardware decoding processor, or executed by a combination of hardware and software units in the decoding processor. The software units may be located in random access memory, flash memory, read-only memory, programmable read-only memory, electrically erasable programmable memory, registers, or other mature storage media in the art. The storage medium is located in memory 402. Processor 401 reads the information in memory 402 and, in conjunction with its hardware, completes the steps of the above method.

[0095] It is understood that the embodiments described herein can be implemented in hardware, software, firmware, middleware, microcode, or a combination thereof. For hardware implementation, the processing unit can be implemented in 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), general-purpose processors, controllers, microcontrollers, microprocessors, other electronic units for performing the functions described herein, or combinations thereof.

[0096] For software implementation, the techniques described herein can be implemented by units that perform the functions described herein. The software code can be stored in memory and executed by a processor. The memory can be implemented in the processor or external to the processor.

[0097] The air conditioning equipment provided in this embodiment can be as follows: Figure 4 The device shown can perform, for example Figure 1 All steps of the method, thus achieving Figure 1 For details on the technical effects of the method shown, please refer to [link / reference]. Figure 1 The relevant descriptions are presented concisely and will not be elaborated upon here.

[0098] This application also provides a storage medium (computer-readable storage medium). This storage medium stores one or more programs. The storage medium may include volatile memory, such as random access memory; it may also include non-volatile memory, such as read-only memory, flash memory, hard disk, or solid-state drive; and it may also include combinations of the above types of memory.

[0099] One or more programs in the storage medium can be executed by one or more processors to implement the above-mentioned fresh air conditioning method executed on the device side.

[0100] The processor is used to execute the fresh air conditioning program stored in the memory to implement the following steps of the fresh air conditioning method executed on the device side: Real-time collection of outdoor fresh air temperature and humidity data, as well as operating parameters of the indoor and outdoor units of the air conditioning system; Based on the temperature and humidity data and the operating parameters, determine whether the dew point temperature of the outdoor fresh air meets the first preset condition, and based on the operating parameters, determine whether the compressor of the air conditioning system meets the second preset condition; If both the first preset condition and the second preset condition are met, then it is determined whether the current indoor unit's operating fan speed and static pressure speed meet the fresh air introduction conditions. If the fresh air introduction conditions are met, fresh air introduction parameters are output to control the operation of the fresh air device of the air conditioning system according to the fresh air introduction parameters.

[0101] Those skilled in the art will further recognize that the units and algorithm steps of the various examples described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of both. To clearly illustrate the interchangeability of hardware and software, the components and steps of the various examples have been generally described in terms of functionality in the foregoing description. Whether these functions are implemented in hardware or software depends on the specific application and design constraints of the technical solution. Those skilled in the art can use different methods to implement the described functions for each specific application, but such implementation should not be considered beyond the scope of this application.

[0102] The steps of the methods or algorithms described in conjunction with the embodiments disclosed herein can be implemented in hardware, a software module executed by a processor, or a combination of both. The software module can be located in random access memory (RAM), main memory, read-only memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.

[0103] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above description is only a specific embodiment of this application and is not intended to limit the scope of protection of this application. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application.

Claims

1. A method for regulating fresh air, characterized in that, include: Real-time collection of outdoor fresh air temperature and humidity data, as well as operating parameters of the indoor and outdoor units of the air conditioning system; Based on the temperature and humidity data and the operating parameters, determine whether the dew point temperature of the outdoor fresh air meets the first preset condition, and determine whether the compressor of the air conditioning system meets the second preset condition based on the operating parameters. If both the first preset condition and the second preset condition are met, then it is determined whether the current indoor unit's operating fan speed and static pressure speed meet the fresh air introduction conditions. If the fresh air introduction conditions are met, fresh air introduction parameters are output to control the operation of the fresh air device of the air conditioning system according to the fresh air introduction parameters.

2. The method according to claim 1, characterized in that, The step of determining whether the dew point temperature of the outdoor fresh air meets the first preset condition based on the temperature and humidity data and the operating parameters includes: Calculate the dew point temperature of the current outdoor fresh air based on the temperature and humidity data; Identify the current operating mode of the indoor unit from the operating parameters; When the operating mode is cooling mode, if the dew point temperature is greater than the first target temperature, it is determined that the dew point temperature meets the first preset condition. The first target temperature is the sum of the set temperature of the heat exchanger of the indoor unit and the first temperature difference threshold corresponding to the cooling mode. and / or When the operating mode is heating mode, if the dew point temperature is less than the second target temperature, it is determined that the dew point temperature meets the first preset condition. The second target temperature is the sum of the set temperature of the heat exchanger of the indoor unit and the second temperature difference threshold corresponding to the heating mode.

3. The method according to claim 1, characterized in that, The step of determining whether the compressor of the air conditioning system meets the second preset condition based on the operating parameters includes: Obtain the compressor's current operating frequency and current input power from the operating parameters; The current operating frequency is compared with a preset frequency full-load threshold, and the current input power is compared with a preset power full-load threshold; When the current operating frequency is less than the frequency full load threshold and the current input power is less than the power full load threshold, the continuous running time of the compressor is obtained, and it is determined whether the continuous running time exceeds the preset stable running time threshold. If the continuous running time exceeds the stable running time threshold, it is determined that the compressor is currently in a non-full load operating state, which meets the second preset condition.

4. The method according to claim 3, characterized in that, The step of determining whether the compressor of the air conditioning system meets the second preset condition based on the operating parameters includes: If the current operating frequency is greater than or equal to the frequency full load threshold, or the current input power is greater than or equal to the power full load threshold, determine whether the compressor is in a preset overload protection state. If the compressor is in an overload protection state, it is determined that the compressor is currently operating under overload or full load conditions, which does not meet the second preset condition; Alternatively, if the duration for which the current operating frequency is greater than or equal to the frequency full-load threshold is greater than a preset duration, and the duration for which the current input power is greater than or equal to the power full-load threshold is greater than a preset duration, then it is determined that the compressor is currently in an overload or full-load operating state, which does not meet the second preset condition.

5. The method according to claim 4, characterized in that, The determination of whether the current indoor unit's operating fan speed and static pressure setting meet the conditions for fresh air introduction includes: The operating parameters are obtained as follows: the current indoor unit's operating fan speed, the highest operating fan speed, the lowest operating fan speed, the current indoor unit's set static pressure level, the highest static pressure level, and the lowest static pressure level. When the operating fan speed is greater than the lowest operating fan speed and less than the highest operating fan speed, and the set static pressure is greater than the lowest static pressure and less than the highest static pressure, it is determined that the current operating fan speed and static pressure of the indoor unit are within the adjustable range, thus meeting the conditions for fresh air introduction. When the operating fan speed is equal to the lowest operating fan speed, or the operating fan speed is equal to the highest operating fan speed, or the set static pressure setting is equal to the lowest static pressure setting, or the set static pressure setting is equal to the highest static pressure setting, it is determined that the current indoor unit's operating fan speed and static pressure setting do not meet the fresh air introduction conditions.

6. The method according to claim 5, characterized in that, The output of fresh air introduction parameters, for controlling the operation of the fresh air device of the air conditioning system according to the fresh air introduction parameters, includes: Obtain the current operating time of the indoor unit from the operating parameters; The fresh air setting parameter is determined based on the operating air setting, wherein the fresh air setting parameter is less than or equal to the difference between the operating air setting and the preset setting, and the preset setting is an integer greater than or equal to one. The fresh air static pressure setting parameter is determined according to the set static pressure setting, wherein the fresh air static pressure setting parameter is less than or equal to the set static pressure setting. The fresh air introduction duration parameter is determined based on the runtime, wherein the fresh air introduction duration parameter is less than or equal to the runtime and greater than or equal to half of the runtime; The fresh air setting parameter, the fresh air static pressure setting parameter, and the fresh air introduction duration parameter are output to the fresh air device to control the fresh air device to introduce outdoor fresh air according to the air volume corresponding to the fresh air setting parameter, the static pressure corresponding to the fresh air static pressure setting parameter, and the duration corresponding to the fresh air introduction duration parameter.

7. The method according to claim 1, characterized in that, When the air conditioning system includes multiple indoor units, the method further includes: Identify the number of indoor units that are currently powered on and have cooling or heating requirements from the operating parameters; When the number of indoor units is equal to one, the fresh air conditioning method according to any one of claims 1 to 5 shall be performed; When the number of indoor units is greater than one and less than or equal to the total number of all indoor units connected to the air conditioning system, the first indoor unit with the lowest operating fan speed and the second indoor unit with the lowest set static pressure are identified from all indoor units that are turned on and have cooling or heating requirements. The operating fan speed of the first indoor unit and the set static pressure speed of the second indoor unit are used as the reference operating parameters. If both the first preset condition and the second preset condition are met, the step of determining whether the current indoor unit's operating fan speed and static pressure speed meet the fresh air introduction conditions is executed based on the benchmark operating parameters.

8. A fresh air conditioning device, characterized in that, include: The data acquisition module is used to collect real-time temperature and humidity data of outdoor fresh air, as well as the operating parameters of the indoor and outdoor units of the air conditioning system. The first judgment module is used to determine whether the dew point temperature of the outdoor fresh air meets the first preset condition based on the temperature and humidity data and the operating parameters, and to determine whether the compressor of the air conditioning system meets the second preset condition based on the operating parameters. The second judgment module is used to determine whether the current indoor unit's operating fan speed and static pressure speed meet the fresh air introduction conditions if the first preset condition and the second preset condition are met simultaneously. The control module is used to output fresh air introduction parameters if the fresh air introduction conditions are met, so as to control the operation of the fresh air device of the air conditioning system according to the fresh air introduction parameters.

9. An air conditioning device, characterized in that, include: A processor and a memory, the processor being configured to execute a fresh air conditioning program stored in the memory to implement the fresh air conditioning method according to any one of claims 1 to 7.

10. A storage medium, characterized in that, The storage medium stores one or more programs, which can be executed by one or more processors to implement the fresh air conditioning method according to any one of claims 1 to 7.

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