Control method and device of fresh air conditioner and air conditioner

Abstract

The invention discloses a control method and device of a fresh air conditioner and the air conditioner. The method comprises the steps that according to the obtained concentration of multiple indoor pollutants and the obtained concentration of multiple outdoor pollutants, an indoor air quality value and an outdoor air quality value are obtained through calculation; the indoor air quality value is compared with a first preset value and a second preset value to obtain a first comparison result, and the outdoor air quality value is compared with the first preset value and the second preset value to obtain a second comparison result; judging whether the first comparison result and the second comparison result meet preset conditions or not; if the first preset condition is met, the air inlet fan and the exhaust fan are closed; if the second preset condition is met, the air inlet fan and the exhaust fan are adjusted to the low air gear; and if the third preset condition is met, the air inlet fan and the exhaust fan are adjusted to the middle air gear. By monitoring various pollutants, the indoor and outdoor air quality can be comprehensively mastered, so that timely and accurate operation response can be realized.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning, in particular to a control method and device of a fresh air conditioner and an air conditioner. BACKGROUND

[0002] At present, in the common indoor air management mode, the air quality monitor can intuitively present the air quality, but cannot meet the air conditioning demand; the air purifier has outstanding purification capacity, but lacks the cold and warm adjustment function; the fresh air all-in-one machine can consider the fresh air and refrigeration and heating, but has the problems of large size, complex installation and high cost. Compared with the above, the fresh air conditioner embeds the fresh air device on the basis of the traditional air conditioner, can optimize the indoor air by introducing the outdoor fresh air, and is convenient to install and economical to use, so it occupies an important position in the air purification field and has been widely recognized through market test.

[0003] The existing fresh air device is usually equipped with an air inlet, an air outlet and an air return to realize bidirectional flow ventilation. Some advanced configurations further include a heat exchanger (to reduce the temperature fluctuation of fresh air by heat exchange between indoor and outdoor air), a filter (to filter impurities in fresh air) and an intelligent controller (to adjust the proportion of fresh air, exhaust air and return air). However, the air quality monitoring function of most current fresh air conditioners has obvious limitations: it only relies on the CO2 sensor of the indoor unit to determine the demand for fresh air opening, the monitoring dimension is single, it cannot comprehensively grasp the indoor and outdoor air quality, and it is difficult to achieve timely and accurate operation response.

[0004] At the same time, although the control logic of the existing fresh air conditioner can alleviate the indoor temperature fluctuation when fresh air is introduced, it lacks effective control and accurate analysis of the air quality of the introduced fresh air. When the outdoor air quality is poor, it is difficult for the filtering system of the fresh air device to completely purify the fresh air, and blind introduction will greatly increase the load of the filtering device and shorten its service life. SUMMARY

[0005] The purpose of the present application is to provide a control method and device of a fresh air conditioner and an air conditioner, which aims to solve the problems of single monitoring dimension of the air quality monitoring function of the fresh air conditioner, inability to comprehensively grasp the indoor and outdoor air quality, difficulty in achieving timely and accurate operation response, lack of dynamic response mechanism based on air quality data, inability to adjust the fresh air volume or filtering intensity according to the real-time pollution level, and risk of blind introduction of pollutants.

[0006] In a first aspect, an embodiment of the present application provides a control method of a fresh air conditioner, the fresh air conditioner comprising an air inlet fan and an air outlet fan, comprising:

[0007] According to the obtained concentrations of the plurality of indoor pollutants and the plurality of outdoor pollutants, indoor air quality values and outdoor air quality values are respectively calculated;

[0008] Comparing the indoor air quality value with a first predetermined value and a second predetermined value to obtain a first comparison result, and comparing the outdoor air quality value with the first predetermined value and the second predetermined value to obtain a second comparison result; wherein the second predetermined value is greater than the first predetermined value;

[0009] Determining whether the first comparison result and the second comparison result meet preset conditions; wherein the preset conditions include a first preset condition, a second preset condition, and a third preset condition;

[0010] If the first preset condition is met, the air intake fan and the exhaust fan are turned off; if the second preset condition is met, the air intake fan and the exhaust fan are adjusted to the low wind gear; if the third preset condition is met, the air intake fan and the exhaust fan are adjusted to the medium wind gear.

[0011] In a second aspect, an embodiment of the present invention provides a control device for a fresh air air conditioner, comprising:

[0012] a calculation unit, configured to calculate an indoor air quality value and an outdoor air quality value according to the obtained concentrations of the plurality of indoor pollutants and the plurality of outdoor pollutants;

[0013] a comparing unit, configured to compare the indoor air quality value with a first predetermined value and a second predetermined value, respectively, to obtain a first comparison result, and to compare the outdoor air quality value with the first predetermined value and the second predetermined value, respectively, to obtain a second comparison result; wherein the second predetermined value is greater than the first predetermined value;

[0014] a judgment unit, configured to judge whether the first comparison result and the second comparison result satisfy a preset condition; wherein the preset condition includes a first preset condition, a second preset condition, and a third preset condition;

[0015] The adjustment unit is used to turn off the air intake fan and the exhaust fan if a first preset condition is met; adjust the air intake fan and the exhaust fan to a low wind speed if a second preset condition is met; and adjust the air intake fan and the exhaust fan to a medium wind speed if a third preset condition is met.

[0016] In a third aspect, an embodiment of the present invention provides an air conditioner, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor. When the processor executes the computer program, the control method for the fresh air air conditioner described in the first aspect is implemented.

[0017] The present invention discloses a control method, device and air conditioner for a fresh air air conditioner, the fresh air air conditioner including an air intake fan and an exhaust fan, the method comprising: calculating an indoor air quality value and an outdoor air quality value based on the concentrations of multiple indoor pollutants and multiple outdoor pollutants; comparing the indoor air quality value with a first predetermined value and a second predetermined value to obtain a first comparison result, and comparing the outdoor air quality value with the first predetermined value and the second predetermined value to obtain a second comparison result; wherein the second predetermined value is greater than the first predetermined value; determining whether the first comparison result and the second comparison result meet preset conditions; wherein the preset conditions include a first preset condition, a second preset condition and a third preset condition; if the first preset condition is met, turning off the air intake fan and the exhaust fan; if the second preset condition is met, adjusting the air intake fan and the exhaust fan to a low wind speed; and if the third preset condition is met, adjusting the air intake fan and the exhaust fan to a medium wind speed. The present invention can comprehensively grasp the indoor and outdoor air quality by monitoring multiple pollutants, thereby achieving timely and accurate operational response. At the same time, it avoids the blind introduction of fresh air, prolongs the life of the filter, reduces indoor temperature fluctuations, and takes into account both health and comfort. The embodiment of the present invention also provides a control device for a fresh air air conditioner and an air conditioner, which have the above-mentioned beneficial effects and will not be described in detail here. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0019] Figure 1 Schematic diagram of the flow of the control method of the fresh air air conditioner;

[0020] Figure 2 It is a structural diagram of an indoor air quality monitoring device;

[0021] Figure 3 It is a structural diagram of an outdoor air quality monitoring device;

[0022] Figure 4 Schematic diagram of a sub-flow of a control method for a fresh air air conditioner;

[0023] Figure 5 The figure is a schematic block diagram of a control device for a fresh air air conditioner. DETAILED DESCRIPTION

[0024] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0025] It will be understood that when used in this specification and the appended claims, the terms “comprises” and “comprising” indicate the presence of described features, integers, steps, operations, elements and / or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or collections thereof.

[0026] It should also be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the present invention. As used in the specification and appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms unless the context clearly indicates otherwise.

[0027] It should be further understood that the term "and / or" used in the present description and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

[0028] See also Figures 1-4 This embodiment provides a control method for a fresh air air conditioner, which includes an air intake fan and an exhaust fan, including:

[0029] S101: Calculating indoor air quality values ​​and outdoor air quality values ​​based on the acquired concentrations of multiple indoor pollutants and multiple outdoor pollutants;

[0030] In this embodiment, the pollutants include at least one of: carbon dioxide (CO2), dust particles (PM2.5 and PM10), formaldehyde (HCHO), combustible gases (liquefied gas, CO and H2, etc.), and toxic gases (NH3, sulfide and benzene vapor, etc.). Specifically, the air quality monitoring device on the fresh air air conditioner monitors the content of multiple gases such as carbon dioxide, temperature and humidity, dust particles, formaldehyde, combustible gases, and toxic gases, reminding users to pay attention to the current air conditions of the indoor and outdoor environments, and more accurately controls the opening of the fresh air mode to ensure the safety and health of the indoor environment. Based on the monitoring of indoor and outdoor air quality parameters, the fresh air air conditioning control method is optimized at the same time, and the introduced fresh air is "checked" and processed to avoid overload operation of the fresh air device, while minimizing fluctuations in indoor ambient temperature and air quality to ensure the comfort of the air environment in the user's space.

[0031] Furthermore, the air quality monitoring device is divided into an indoor unit and an outdoor unit, also known as a master and a slave, embedded in the indoor and outdoor units of a split-type room air conditioner, respectively. A master-slave monitoring device monitors the AQI value of the current location (indoor and outdoor) in real time, and displays the real-time monitoring data from both units on the master's display. The master simultaneously transmits this data to the air conditioner's indoor unit controller. The indoor unit analyzes and judges the indoor and outdoor air quality monitoring data, and based on built-in control methods, adjusts the operating status of the fresh air device in real time. The fresh air device is also secondary controlled based on the real-time indoor and outdoor temperatures, optimizing indoor air quality while stabilizing the indoor temperature as much as possible.

[0032] The master device includes a carbon dioxide sensor, a dust and particulate matter sensor, a formaldehyde sensor, a combustible gas sensor, a toxic gas sensor, a temperature and humidity sensor, a power management module, a signal amplification and ADC analog-to-digital conversion module, a microcontroller module, a display module, a Flash memory module, and a wireless communication module. The slave device also includes a carbon dioxide sensor, a dust and particulate matter sensor, a formaldehyde sensor, a combustible gas sensor, a toxic gas sensor, a temperature and humidity sensor, a power management module, a signal amplification and ADC analog-to-digital conversion module, a microcontroller module, and a wireless communication module. The master and slave devices independently detect analog values ​​of various gas quality parameters in the air within their respective spaces using their sensors. The ADC module converts the analog-to-digital signals. The converted digital signals are processed by the microcontroller module and displayed on the display screen, indicating the current air quality index (AQI). The slave device then transmits this data to the master device via a wireless transmission module. The master and slave device data are displayed simultaneously on the master display module for real-time comparison. Furthermore, the master microcontroller module stores its own data and received data from the slave devices in the Flash memory module. Users can access and view this stored data via the Wi-Fi module or other related interfaces. Both the host and the remote control are also pre-set with air quality display logic, which can display corresponding information on the screen according to the current indoor and outdoor air quality conditions. It is straightforward and clear to the user.

[0033] In this embodiment, the indoor air quality value and the outdoor air quality value are calculated based on the obtained concentrations of multiple indoor pollutants and the obtained concentrations of multiple outdoor pollutants, respectively, including:

[0034] Calculate the corresponding indoor sub-index of pollutants based on the concentrations of multiple indoor pollutants;

[0035] The maximum value among all indoor sub-indices is determined as the indoor air quality value;

[0036] Calculate the outdoor sub-index of the corresponding pollutants according to the concentration of multiple outdoor pollutants;

[0037] The maximum value among all outdoor sub-indices is determined as the outdoor air quality value.

[0038] Specifically, the indoor air quality monitoring device (master) of the fresh air air conditioner obtains real-time concentrations of various indoor pollutants, including carbon dioxide, particulate matter (PM2.5, PM10), formaldehyde, combustible gas, and toxic gas concentrations. For each indoor pollutant, the master calculates the corresponding indoor sub-index based on its concentration value and the preset concentration-sub-index correspondence. After calculating the sub-indexes for all indoor pollutants, the master selects the maximum value among all indoor sub-indices and determines it as the indoor air quality value. Simultaneously, the outdoor air quality monitoring device (slave) simultaneously obtains the concentrations of various outdoor pollutants, including the concentrations of the aforementioned pollutants. Using the same calculation method as the indoor pollutant sub-indices, it calculates the outdoor sub-index corresponding to each outdoor pollutant and then selects the maximum value among all outdoor sub-indices as the outdoor air quality value. The slave transmits the calculated outdoor air quality value to the master via a wireless communication module. The master integrates the indoor and outdoor air quality values ​​to provide the core judgment parameters for the subsequent fresh air control logic based on indoor and outdoor air quality.

[0039] In this embodiment, the Air Quality Index (AQI) is a commonly used indicator for measuring air pollution levels. AQI converts the concentration of different pollutants into a single numerical value, which is easy for the public to understand. The calculation method of the air quality AQI value (including indoor air quality value and outdoor air quality value) is the same as the broad air quality value monitored by the Meteorological Bureau, that is: for each pollutant, the corresponding sub-index is calculated according to its concentration value. The AQI value is the maximum value of all sub-indices, reflecting the impact of the most serious pollutants in the current environment. The sub-indices calculation formula is as follows:

[0040]

[0041] Among them, each pollutant has a corresponding relationship between its concentration range and sub-index, which will not be described in detail here. In general, the AQI level is usually divided into: 0-50 (good), 51-100 (light pollution), 101-150 (moderate pollution), 151-200 (heavy pollution), and above 201 (severe pollution). However, the difference is that the pollutants detected by the meteorological bureau for monitoring air quality are mainly particulate matter (PM2.5 and PM10), sulfur dioxide (SO2), nitrogen oxides (NOX), ozone (O3), carbon monoxide (CO), and volatile organic compounds (VOCS), while the pollutants detected by the present invention for monitoring air quality are mainly carbon dioxide (CO2), particulate matter (PM2.5 and PM10), formaldehyde (HCHO), combustible gases (liquefied gas, CO and H2, etc.), and toxic gases (NH3, sulfide and benzene vapor, etc.). The present invention is mainly used in living scenarios such as home residences. The pollutants monitored are some risks that are more likely to occur in users' daily lives, such as gas leaks. Therefore, the air quality AQI value is also different from the value monitored by the Meteorological Bureau. Relatively speaking, due to space limitations, the air quality data monitored by the present invention is more accurate and closer to users' actual lives.

[0042] In a specific example, for PM2.5, assume that its concentration range and sub-index correspond to the following: 0-35μg / m 3 :0-49;35-75μg / m 3 : 50-100; 75-115 μg / m 3 :101-150;

[0043] If the concentration of PM2.5 is 50μg / m 3 , its concentration is between 35-75μg / m 3 The low concentration threshold is 35, the high concentration threshold is 75, the high score index is 100, and the low score index is 50. Therefore, the score index is calculated as follows:

[0044] Sub-index = (50-35) / (75-35)×(100-50)+50=71.25;

[0045] AQI levels are: 0-50: good; 51-100: light pollution; 101-150: moderate pollution; 151-200: heavy pollution; and above 201: severe pollution.

[0046] It can be seen that its PM2.5 AQI is at the level of mild pollution.

[0047] S102: Compare the indoor air quality value with a first predetermined value and a second predetermined value respectively to obtain a first comparison result, and compare the outdoor air quality value with the first predetermined value and the second predetermined value respectively to obtain a second comparison result; wherein the second predetermined value is greater than the first predetermined value;

[0048] S103: Determine whether the first comparison result and the second comparison result meet preset conditions; wherein the preset conditions include a first preset condition, a second preset condition, and a third preset condition;

[0049] S104: If the first preset condition is met, the air intake fan and the exhaust fan are turned off; if the second preset condition is met, the air intake fan and the exhaust fan are adjusted to a low wind speed; if the third preset condition is met, the air intake fan and the exhaust fan are adjusted to a medium wind speed.

[0050] The first preset condition is that the indoor air quality value is less than or equal to a first predetermined value (also referred to as standard value 1), or the outdoor air quality value is greater than a second predetermined value (also referred to as standard value 2), or the indoor air quality value is less than the outdoor air quality value;

[0051] The second preset condition is that both the indoor air quality value and the outdoor air quality value are greater than the first predetermined value, the outdoor air quality value is less than or equal to the second predetermined value, and the indoor air quality value is greater than the outdoor air quality value;

[0052] The third preset condition is that the indoor air quality value is greater than the first predetermined value, and the outdoor air quality value is less than or equal to the first predetermined value.

[0053] In this embodiment, the system dynamically adjusts the fresh air control strategy according to three preset conditions. When the first preset condition is met (indoor air quality value ≤ first predetermined value, or outdoor air quality value > second predetermined value, or indoor air quality value < outdoor air quality value), the system triggers specific control logic. For example, if the indoor air quality value is 40 (first predetermined value = 50), or the outdoor air quality value is 120 (second predetermined value = 100), or the indoor air quality value is 60 and the outdoor air quality value is 70 (indoor AQI < outdoor AQI), the system determines that the current air quality does not require the introduction of fresh air, automatically closes the fresh air inlet or prompts the user that ventilation is not required.

[0054] When the second preset condition is met (both the indoor air quality value and the outdoor air quality value are greater than the first predetermined value, and the outdoor air quality value is ≤ the second predetermined value, and the indoor air quality value is greater than the outdoor air quality value), the system prioritizes the introduction of outdoor fresh air. For example, if the indoor air quality value is 80 and the outdoor air quality value is 70 (first predetermined value = 50, second predetermined value = 100), and the indoor AQI is greater than the outdoor AQI, the system opens the fresh air inlet and adjusts the fresh air ratio based on the indoor and outdoor AQI difference (such as partial opening), while also activating the filtration and purification device to optimize the fresh air quality.

[0055] When the third preset condition is met (indoor air quality value > first predetermined value, and outdoor air quality value ≤ first predetermined value), the system fully introduces fresh air. For example, if the indoor air quality value is 90 and the outdoor air quality value is 40 (first predetermined value = 50), the system determines that the outdoor air quality is better than the indoor air quality, automatically opens the fresh air inlet in full, and simultaneously starts the high-efficiency purification mode to quickly dilute indoor pollutants. The above conditions are triggered by the real-time calculated indoor air quality value and outdoor air quality value, and the control status is fed back to the user in combination with the color coding and status characters (such as "good", "general", "poor") of the display panel of the indoor unit and the remote control.

[0056] This embodiment activates the fresh air device when outdoor air quality is good but indoor air quality is average or poor, and simultaneously sets the intake and exhaust fans in the fresh air device to medium speed, thereby rapidly improving indoor air quality. If outdoor air quality is average and the indoor air quality is also average or poor, and the indoor AQI is higher than the outdoor AQI, the fresh air device activates. Due to the certain pollutants in the outdoor air, the intake and exhaust fan speeds are set to low speed, which can also gradually improve indoor air quality. This also reduces the burden on the fresh air device's purification and filtration modules, extending their service life.

[0057] Furthermore, the secondary control method based on indoor and outdoor temperature is based on other existing fresh air pretreatment technologies and does not conflict with them. Based on the monitoring of indoor and outdoor air quality and temperature, it further optimizes the control strategy of the fresh air device's air inlet and exhaust fans, which can also achieve the triple goals of reducing indoor temperature fluctuations, saving energy, and optimizing indoor air quality to a certain extent. Figure 2 The specific description is as follows:

[0058] Adjust the intake and exhaust fans to low settings, including:

[0059] When the air conditioner is in cooling mode, obtain the indoor set temperature and outdoor temperature;

[0060] Determine whether the outdoor temperature is greater than the indoor set temperature;

[0061] If the outdoor temperature is greater than the indoor set temperature, then determine whether the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference;

[0062] If the temperature difference between the outdoor temperature and the indoor set temperature is greater than the preset temperature difference, the exhaust fan will be turned off and the air speed of the inlet fan will remain unchanged;

[0063] If the temperature difference between the outdoor temperature and the indoor set temperature is less than or equal to the predetermined temperature difference, the air speed of the inlet and exhaust fans is kept unchanged;

[0064] If the outdoor temperature is less than or equal to the indoor set temperature, keep the air speed of the inlet and exhaust fans unchanged.

[0065] In this embodiment, when the air-conditioning operation mode is cooling mode and the air intake fan and the exhaust fan have been adjusted to the low wind gear, the system further optimizes the fresh air control logic according to the difference in indoor and outdoor temperatures. First, the system obtains the indoor set temperature (such as 26°C) and the current outdoor temperature (such as 32°C) in real time. If the outdoor temperature is greater than the indoor set temperature (such as 32°C>26°C), the system calculates the temperature difference between the two (such as 32-26=6°C). If the temperature difference is greater than the predetermined temperature difference, which can also be called the preset temperature difference threshold (such as 5°C), the system automatically turns off the exhaust fan and keeps the air intake fan running at a low wind gear, only taking in air. Relative to the preset windshield, it can alleviate indoor temperature fluctuations to a certain extent, reduce the air conditioning refrigeration burden, and avoid the formation of negative pressure in the air in the room, allowing unpurified outdoor air to enter through the gaps in doors and windows and pollute the indoor air. If the temperature difference is less than or equal to the preset temperature difference threshold (such as 4℃≤5℃), the system will keep the air intake and exhaust fans at low speed, and first perform relatively rapid ventilation to optimize air quality. After the indoor AQI ≈ the outdoor AQI, the fresh air device will automatically shut down, and the temperature fluctuation will not be too large, while also ensuring a relatively stable cooling effect. If the outdoor temperature is less than or equal to the indoor set temperature (such as 25℃≤26℃), the introduction of fresh air can play a certain cooling role, thereby reducing the room's cooling load and the air conditioner's operating load. The air intake and exhaust fans still operate at the preset low speed, so that the room temperature reaches the set value relatively quickly, and the air conditioner reduces frequency and stabilizes operation in advance to achieve energy saving.

[0066] In this embodiment, adjusting the air inlet fan and the exhaust fan to a low wind speed includes:

[0067] When the air conditioner is in heating mode, obtain the indoor set temperature and outdoor temperature;

[0068] Determine whether the outdoor temperature is lower than the indoor set temperature;

[0069] If the outdoor temperature is lower than the indoor set temperature, determine whether the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference;

[0070] If the temperature difference between the outdoor temperature and the indoor set temperature is greater than the preset temperature difference, the exhaust fan will be turned off and the air speed of the inlet fan will remain unchanged;

[0071] If the temperature difference between the outdoor temperature and the indoor set temperature is less than or equal to the predetermined temperature difference, the air speed of the inlet and exhaust fans is kept unchanged;

[0072] If the outdoor temperature is greater than or equal to the indoor set temperature, the wind speed of the intake and exhaust fans remains unchanged.

[0073] When the air conditioner is operating in heating mode and the intake and exhaust fans are set to low speed, the system optimizes the fresh air control logic based on temperature differences. First, the system obtains the indoor setpoint temperature (e.g., 20°C) and the current outdoor temperature (e.g., 5°C) in real time. If the outdoor temperature is lower than the indoor setpoint (e.g., 5°C < 20°C), the temperature difference between the two is calculated (e.g., 20-5 = 15°C). If the temperature difference exceeds a preset threshold (e.g., 10°C), the system determines that the low outdoor temperature may affect heating efficiency and automatically shuts off the exhaust fan while maintaining the intake fan at low speed. This, relative to the preset speed, mitigates indoor temperature fluctuations, reduces the heating burden of the air conditioner, and prevents negative pressure from forming in the room, which could allow unpurified outdoor air to enter through gaps in doors and windows and contaminate the indoor air. If the temperature difference is less than or equal to the preset threshold (e.g., 8°C ≤ 10°C), the system maintains the intake and exhaust fan speeds unchanged, maintaining the current low speed setting. At this time, the air quality is optimized by relatively rapid ventilation. When the indoor AQI ≈ the outdoor AQI, the fresh air device is automatically shut down, and the temperature fluctuation will not be too large, while also ensuring a relatively stable heating effect. If the outdoor temperature is greater than or equal to the indoor set temperature (such as 22°C ≥ 20°C), the system still maintains the low wind speed of the air intake and exhaust fans unchanged. At this time, the introduction of fresh air can also play a certain heating role, so that the temperature in the room reaches the set value relatively quickly, and the air conditioner reduces the frequency and runs stably in advance to achieve the purpose of energy saving. This logic is implemented through the linkage of the temperature sensor and the control module, maintaining the stability of the introduction of fresh air while ensuring heating efficiency, avoiding unnecessary fan adjustments and increased energy consumption.

[0074] In this embodiment, adjusting the air intake fan and the exhaust fan to the medium wind speed includes:

[0075] When the air conditioner is in cooling mode, obtain the indoor set temperature and outdoor temperature;

[0076] Determine whether the outdoor temperature is greater than the indoor set temperature;

[0077] If the outdoor temperature is greater than the indoor set temperature, then determine whether the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference;

[0078] If the temperature difference between the outdoor temperature and the indoor set temperature is greater than the predetermined temperature difference, the inlet fan is lowered to the low wind speed and the exhaust fan wind speed is kept unchanged;

[0079] If the temperature difference between the outdoor temperature and the indoor set temperature is less than or equal to the predetermined temperature difference, the air speed of the inlet fan and the exhaust fan remains unchanged;

[0080] If the outdoor temperature is less than or equal to the indoor set temperature, the air inlet and exhaust fans are raised to the high wind speed.

[0081] When the air conditioner is in cooling mode and the air intake fan and the exhaust fan have been adjusted to the medium wind gear, the system optimizes the fresh air control logic through temperature differences. First, the system obtains the indoor set temperature (such as 26°C) and the current outdoor temperature (such as 32°C) in real time. If the outdoor temperature is greater than the indoor set temperature (such as 32°C>26°C), the temperature difference between the two is calculated (such as 32-26=6°C). If the temperature difference is greater than the preset temperature difference threshold (such as 5°C), the system automatically reduces the air intake fan to a low wind gear and keeps the exhaust fan running at a medium wind gear, so that the air intake speed is less than the exhaust speed. Compared with the preset wind gear, it can alleviate indoor temperature fluctuations to a certain extent, reduce the air conditioning cooling burden, and at the same time form a negative pressure in the room, allowing outdoor air to enter from the gaps in doors and windows to make the ventilation more uniform. If the temperature difference is less than or equal to the preset threshold (e.g., 4°C ≤ 5°C), the system maintains the medium speed setting for the intake and exhaust fans, initially rapidly exchanging air to optimize indoor air quality. Once the indoor AQI reaches approximately the outdoor AQI, the fresh air supply automatically shuts off. This minimizes temperature fluctuations and ensures a relatively stable cooling effect. If the outdoor temperature is less than or equal to the set indoor temperature (e.g., 25°C ≤ 26°C), the introduction of fresh air can provide some cooling, reducing both the room's cooling load and the air conditioner's operating load. Simultaneously, the intake and exhaust fan speeds are increased to high speed, allowing the room temperature to reach the set point more quickly and the air conditioner to reduce its speed and stabilize operation, thus achieving energy savings. This logic, implemented through the linkage between the temperature sensor and the control module, balances fresh air introduction efficiency with energy efficiency in cooling mode, preventing high-temperature fresh air from causing indoor temperature fluctuations or increased energy consumption.

[0082] In this embodiment, adjusting the air intake fan and the exhaust fan to the medium wind speed includes:

[0083] When the air conditioner is in heating mode, obtain the indoor set temperature and outdoor temperature;

[0084] Determine whether the outdoor temperature is lower than the indoor set temperature;

[0085] If the outdoor temperature is lower than the indoor set temperature, determine whether the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference;

[0086] If the temperature difference between the outdoor temperature and the indoor set temperature is greater than the predetermined temperature difference, the inlet fan is lowered to the low wind speed and the exhaust fan wind speed is kept unchanged;

[0087] If the temperature difference between the outdoor temperature and the indoor set temperature is less than or equal to the predetermined temperature difference, the air speed of the inlet fan and the exhaust fan remains unchanged;

[0088] If the outdoor temperature is greater than or equal to the indoor set temperature, the intake and exhaust fans are raised to the high wind speed.

[0089] When the air conditioner is in heating mode and the air intake fan and the exhaust fan are adjusted to the medium wind gear, the system optimizes the fresh air control logic through temperature differences. First, the system obtains the indoor set temperature (such as 20°C) and the current outdoor temperature (such as 5°C) in real time. If the outdoor temperature is lower than the indoor set temperature (such as 5°C < 20°C), the temperature difference between the two is calculated (such as 20-5 = 15°C). If the temperature difference is greater than the preset temperature difference threshold (such as 10°C), the system automatically reduces the air intake fan to a low wind gear and keeps the exhaust fan running at a medium wind gear, so that the air intake speed is less than the exhaust speed. Compared with the preset wind gear, it can alleviate indoor temperature fluctuations to a certain extent, reduce the burden of air conditioning heating, and at the same time form a negative pressure in the room, allowing outdoor air to enter from the gaps in doors and windows to make ventilation more uniform. If the temperature difference is less than or equal to the preset threshold (e.g., 8°C ≤ 10°C), the system maintains the medium speed setting for the intake and exhaust fans, initially rapidly exchanging air to optimize indoor air quality. Once the indoor AQI reaches approximately the outdoor AQI, the fresh air supply automatically shuts off. This minimizes temperature fluctuations and ensures a relatively stable heating effect. If the outdoor temperature is greater than or equal to the set indoor temperature (e.g., 22°C ≥ 20°C), the introduction of fresh air can contribute to a certain heating effect, reducing the room's heat load and the air conditioner's operating load. Simultaneously, the intake and exhaust fan speeds are increased to high speed, allowing the room temperature to reach the set point more quickly and the air conditioner to reduce its speed and stabilize operation earlier, thus achieving energy savings. This logic, implemented through the linkage between the temperature sensor and the control module, balances fresh air intake efficiency with heat retention in heating mode, preventing low-temperature fresh air from causing indoor temperature fluctuations or increasing heating energy consumption.

[0090] In the secondary control method based on indoor and outdoor temperatures in this embodiment, the preset temperature difference threshold value has different values ​​under the cooling and heating conditions of the fresh air air conditioner. This embodiment provides reference values ​​of 5°C for cooling and 10°C for heating. In practice, these values ​​are limited by factors such as the configuration of the air conditioning system, cooling and heating capacity, room size, and temperature adjustment range. Generally speaking, this preset temperature difference threshold value is larger under heating conditions than under cooling conditions. The preset temperature difference threshold value can be further set according to the specific configuration of the fresh air air conditioner model and the installation environment, which will not be analyzed here.

[0091] The air quality monitoring device of this embodiment is applicable to a wide variety of fresh air air conditioners with varying configurations. The specific installation and embedding locations of the master and slave units within the split-type air conditioner's internal and external units depend on the structure and electrical design of the various fresh air air conditioners and air quality monitoring devices, and are not discussed in detail here. The selection of electronic components for the various sensors and modules in the air quality monitoring device is also governed by factors such as actual functionality, cost, structure, and monitoring accuracy, and is subject to the actual development and design of the electronic control system, and is not discussed in detail here.

[0092] In this embodiment, the air quality display logic of the host and remote control is as follows: the host receives data from the slave, synchronously compares and displays indoor and outdoor AQI data on the host and remote control display panels, and synchronously determines the difference between the indoor and outdoor AQI and the standard value. The host and remote control make corresponding display states according to the following nine indoor and outdoor air quality states, calibrate the indoor and outdoor AQI value character colors on the host display panel, the air quality status characters displayed on the remote control panel, and the fresh air icon status. The specific display conditions are shown in Tables 1 and 2 below:

[0093] Table 1

[0094]

[0095] Table 2

[0096]

[0097] The above logic is updated synchronously through the communication protocol between the host and the remote control, ensuring that users can intuitively obtain indoor and outdoor air quality comparison information and fresh air operation suggestions through the host or remote control.

[0098] In this embodiment, the method further includes: obtaining concentration data of multiple indoor and outdoor pollutants, wherein the pollutants include high-hazard pollutants (such as formaldehyde and combustible gases) and conventional pollutants; calculating a corresponding sub-index for the concentration data of each pollutant; multiplying the sub-index of the high-hazard pollutant by a preset weight coefficient, wherein the weight coefficient is greater than 1 to reflect its higher health risk; and using the maximum value of the sub-indices of all pollutants as the final air quality index (AQI).

[0099] The system uses integrated sensors to obtain real-time concentration data of various indoor and outdoor pollutants, including high-hazard pollutants such as formaldehyde (CH2O) and combustible gases (such as methane CH4), and conventional pollutants such as PM2.5, CO2, and NO2. The system collects the concentration data of various pollutants in real time based on the preset standard values ​​(such as formaldehyde standard value = 0.08mg / m 3, combustible gas standard value = 25ppm) to calculate the sub-index of each pollutant. Then, the sub-index of high-hazard pollutants is further multiplied by the preset weight coefficient (such as formaldehyde sub-index × 1.5, combustible gas sub-index × 1.2) to amplify its health risk weight. For example, when the indoor formaldehyde concentration is 0.06mg / m 3 When a combustible gas concentration of 30 ppm is detected, the sub-index is 75, which multiplied by a weighting factor of 1.5 yields 112.5. If a combustible gas concentration of 30 ppm is also detected, the sub-index is 120, which multiplied by a weighting factor of 1.2 yields 144. The system compares the weighted sub-indexes of all pollutants and takes the maximum value (e.g., 144) as the final Air Quality Index (AQI), which is used to trigger subsequent display and control logic. This approach increases sensitivity to high-hazard pollutants through differentiated weighting, more accurately reflecting actual health risks.

[0100] In this embodiment, it also includes: receiving room area and floor height data input by the user; then detecting the presence status and activity intensity level of indoor personnel through the human body sensing module; then dynamically calculating the fresh air volume baseline value: then calculating the space volume based on the room area and floor height, generating the space volume coefficient Kv; then matching the per capita fresh air volume coefficient Ka according to the activity intensity level; then calculating the baseline fresh air volume according to the formula Qbase=N×Ka×Kv based on the detected number of people N in the room; and then adjusting the target speeds of the intake fan and exhaust fan according to the preset mapping relationship based on the baseline fresh air volume Qbase.

[0101] Specifically, the room area (such as 30m2) input by the user through the host control panel is received. 2 ) and floor height (e.g. 2.8m), and calculate the space volume as 84m 3 (30×2.8). Subsequently, the human body sensing module, which is a combination of human infrared sensors and acceleration sensors, detects the presence status and activity intensity level of people in the room in real time. For example, if two people are detected sitting quietly (breathing rate ≤ 12 times / minute), the system determines the activity intensity as "sitting quietly". The system generates the space volume coefficient Kv according to the preset rules (such as area ≥ 30m 2 (and Kv = 1.2 when the floor height is ≥ 2.5m) and the per capita fresh air volume coefficient Ka corresponding to the activity intensity level (Ka = 1.0 for sitting still and Ka = 1.5 for light activity). Based on the detected number of people N = 2 in the room, the base fresh air volume is calculated according to the formula Qbase = N × Ka × Kv: Qbase = 2 × 1.0 × 1.2 = 2.4m 3 / h. The system maps the baseline fresh air volume to the preset mapping relationship table (such as Qbase<30m 3 / h corresponds to low wind speed, 30~60m 3 / h corresponds to the stroke level, and >60m 3 / h corresponds to high wind speed), ultimately adjusting the target speed of the intake and exhaust fans to medium wind speed (such as 1200rpm), and simultaneously updating the status of the fresh air icon on the main unit display panel (for example, it lights up to indicate fresh air is being introduced). This logic is calculated and executed in real time by the control module to ensure that the fresh air volume is precisely adapted to the space characteristics and user needs.

[0102] The activity intensity levels are divided into the following categories:

[0103] Low intensity: static sitting or lying position, corresponding to Ka = 20m 3 / h;

[0104] Moderate intensity: standing or moving slowly, corresponding to Ka = 35m 3 / h;

[0105] High intensity: running or jumping, corresponding to Ka = 50m 3 / h.

[0106] In some embodiments, the space volume coefficient Kv is calculated as follows: Kv = room volume / reference volume, where the reference volume can be set to 30m 3 , the reference volume can also be determined according to the actual situation.

[0107] This coefficient reflects the multiple relationship between the actual volume of the room and the standard volume, and is used to adjust the baseline value of the fresh air volume.

[0108] In some embodiments, the preset mapping relationship is: target speed = reference speed × (Qbase / Qstd), where Qstd is the preset standard fresh air volume of 30m 3 / h, Qstd can also be determined according to actual circumstances.

[0109] By calculating the ratio of Qbase to Qstd in real time, the fan speed can be continuously adjusted, ensuring that the fresh air volume is accurately adapted to the space requirements.

[0110] The ambient air quality monitoring device and its accompanying fresh air air conditioning control method of this embodiment are highly compatible and adaptable, seamlessly integrating with common household air conditioners with fresh air functions on the market, including but not limited to split wall-mounted, cabinet-type, multi-split, or single-unit window air conditioners. This broad compatibility enables the system to be installed and applied in a variety of ordinary residential environments, and to a certain extent, it can also be applied in scenarios with higher air cleanliness requirements, such as hospitals, laboratories, and high-end offices.

[0111] The embodiment can monitor the content of carbon dioxide, temperature and humidity, dust particles, formaldehyde, combustible gas and toxic gas, etc., prompt the user to pay attention to the air condition of the current indoor and outdoor environment, accurately determine whether the fresh air mode is started, and guarantee the safety and health of the indoor environment. Based on the indoor and outdoor air environment quality parameters, the fresh air air conditioner control method is optimized, the introduced fresh air is screened and processed, the overload operation of the fresh air device is avoided, the indoor environment temperature and air quality fluctuation are reduced as much as possible, and the air environment comfort of the space where the user is located is guaranteed.

[0112] Referring to Figure 5 The embodiment provides a control device 200 of a fresh air air conditioner, which comprises:

[0113] A calculation unit 201 is configured to calculate indoor air quality values and outdoor air quality values respectively according to the obtained concentrations of various indoor pollutants and the concentrations of various outdoor pollutants.

[0114] A comparison unit 202 is configured to compare the indoor air quality values with first and second predetermined values respectively to obtain first comparison results, and compare the outdoor air quality values with the first and second predetermined values respectively to obtain second comparison results, wherein the second predetermined value is greater than the first predetermined value.

[0115] A judgment unit 203 is configured to judge whether the first comparison results and the second comparison results satisfy preset conditions, wherein the preset conditions comprise first, second and third preset conditions.

[0116] An adjustment unit 204 is configured to close an air inlet fan and an air outlet fan if the first preset condition is satisfied, adjust the air inlet fan and the air outlet fan to a low wind gear if the second preset condition is satisfied, and adjust the air inlet fan and the air outlet fan to a medium wind gear if the third preset condition is satisfied.

[0117] Further, the first preset condition is that the indoor air quality value is less than or equal to the first predetermined value, or the outdoor air quality value is greater than the second predetermined value, or the indoor air quality value is less than the outdoor air quality value.

[0118] The second preset condition is that the indoor air quality value and the outdoor air quality value are both greater than the first predetermined value, the outdoor air quality value is less than or equal to the second predetermined value, and the indoor air quality value is greater than the outdoor air quality value.

[0119] The third preset condition is that the indoor air quality value is greater than the first predetermined value, and the outdoor air quality value is less than or equal to the first predetermined value.

[0120] Furthermore, the adjusting unit 204 includes:

[0121] The first temperature acquisition subunit is used to acquire the indoor set temperature and the outdoor temperature when the air conditioner operation mode is the cooling mode;

[0122] A first judging subunit, configured to judge whether the outdoor temperature is greater than the indoor set temperature;

[0123] a second judgment subunit, configured to judge whether a temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference if the outdoor temperature is greater than the indoor set temperature;

[0124] a first closing subunit, configured to close the exhaust fan and keep the air speed of the inlet fan unchanged if the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference;

[0125] a first reducing subunit, configured to maintain the wind speeds of the air inlet fan and the exhaust fan unchanged if the temperature difference between the outdoor temperature and the indoor set temperature is less than or equal to a predetermined temperature difference;

[0126] The second reducing subunit is used to keep the wind speeds of the air inlet fan and the exhaust fan unchanged if the outdoor temperature is less than or equal to the indoor set temperature.

[0127] Furthermore, the adjusting unit 204 further includes:

[0128] The second temperature acquisition subunit is used to acquire the indoor set temperature and the outdoor temperature when the air conditioner operation mode is the heating mode;

[0129] a third judging subunit, configured to judge whether the outdoor temperature is lower than the indoor set temperature;

[0130] a fourth judgment subunit, configured to judge whether a temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference if the outdoor temperature is lower than the indoor set temperature;

[0131] a second closing subunit, configured to close the exhaust fan and keep the air speed of the inlet fan unchanged if the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference;

[0132] a third reducing subunit, configured to maintain the wind speeds of the air inlet fan and the exhaust fan unchanged if the temperature difference between the outdoor temperature and the indoor set temperature is less than or equal to a predetermined temperature difference;

[0133] The fourth reducing subunit is used to keep the wind speeds of the air inlet fan and the exhaust fan unchanged if the outdoor temperature is greater than or equal to the indoor set temperature.

[0134] Furthermore, the adjusting unit 204 further includes:

[0135] The third temperature acquisition subunit is used to acquire the indoor set temperature and the outdoor temperature when the air conditioner operation mode is the cooling mode;

[0136] a fifth judging subunit, configured to judge whether the outdoor temperature is greater than the indoor set temperature;

[0137] a sixth judgment subunit, configured to judge whether a temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference if the outdoor temperature is greater than the indoor set temperature;

[0138] a first maintaining subunit, configured to reduce the air intake fan to a low wind speed and maintain the air exhaust fan wind speed unchanged if the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference;

[0139] a second maintaining subunit, configured to maintain the air speeds of the air inlet fan and the exhaust fan unchanged if the temperature difference between the outdoor temperature and the indoor set temperature is less than or equal to a predetermined temperature difference;

[0140] The lifting subunit is used to lift the air intake fan and the exhaust fan to a high wind speed if the outdoor temperature is less than or equal to the indoor set temperature.

[0141] Furthermore, the adjusting unit 204 further includes:

[0142] The fourth temperature acquisition subunit is used to obtain the indoor set temperature and the outdoor temperature when the air conditioner operation mode is the heating mode;

[0143] A temperature judgment subunit, configured to judge whether the outdoor temperature is lower than the indoor set temperature;

[0144] a temperature difference judgment subunit, configured to judge whether the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference if the outdoor temperature is lower than the indoor set temperature;

[0145] a wind speed lowering subunit, configured to lower the wind speed of the inlet fan to a low wind speed and maintain the wind speed of the exhaust fan unchanged if the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference;

[0146] a third maintaining subunit, configured to maintain the air speeds of the air inlet fan and the exhaust fan unchanged if the temperature difference between the outdoor temperature and the indoor set temperature is less than or equal to a predetermined temperature difference;

[0147] The wind speed raising subunit is used to raise the air intake fan and the exhaust fan to a high wind speed if the outdoor temperature is greater than or equal to the indoor set temperature.

[0148] Furthermore, the calculation unit 201 includes:

[0149] An indoor sub-index calculation sub-unit, configured to calculate the indoor sub-index of corresponding pollutants according to the concentrations of a plurality of indoor pollutants;

[0150] an indoor air quality value determination subunit, configured to determine the maximum value among all indoor sub-indices as the indoor air quality value;

[0151] An outdoor sub-index calculation sub-unit, configured to calculate the outdoor sub-index of corresponding pollutants according to the concentrations of a plurality of outdoor pollutants;

[0152] The outdoor air quality value determination subunit is used to determine the maximum value of all outdoor sub-indices as the outdoor air quality value.

[0153] Furthermore, the pollutants include at least one of carbon dioxide, dust particles, formaldehyde, combustible gas and toxic gas.

[0154] Those skilled in the art will clearly understand that, for the convenience and brevity of description, the specific working processes of the above-mentioned devices and units can refer to the corresponding processes in the aforementioned method embodiments and will not be repeated here.

[0155] The present invention further provides an air conditioner, which may include a memory and a processor. The memory stores a computer program, and the processor, when calling the computer program in the memory, may implement the method provided in the above embodiment. Of course, the computer device may also include various network interfaces, a power supply, and other components.

[0156] The various embodiments in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same and similar parts between the various embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part description. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0157] It should also be noted that, in this specification, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprising" or any other variations thereof are intended to cover non-exclusive.

[0158] Inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

Claims

1. A control method for a fresh air air conditioner, wherein the fresh air air conditioner comprises an air inlet fan and an exhaust fan, characterized in that: include: Calculating indoor air quality values ​​and outdoor air quality values ​​based on the obtained concentrations of multiple indoor pollutants and multiple outdoor pollutants; Comparing the indoor air quality value with a first predetermined value and a second predetermined value to obtain a first comparison result, and comparing the outdoor air quality value with the first predetermined value and the second predetermined value to obtain a second comparison result; wherein the second predetermined value is greater than the first predetermined value; Determining whether the first comparison result and the second comparison result meet preset conditions; wherein the preset conditions include a first preset condition, a second preset condition, and a third preset condition; If the first preset condition is met, the air intake fan and the exhaust fan are turned off; if the second preset condition is met, the air intake fan and the exhaust fan are adjusted to the low wind gear; if the third preset condition is met, the air intake fan and the exhaust fan are adjusted to the medium wind gear.

2. The control method of the fresh air air conditioner according to claim 1, characterized in that: The first preset condition is that the indoor air quality value is less than or equal to the first predetermined value, or the outdoor air quality value is greater than the second predetermined value, or the indoor air quality value is less than the outdoor air quality value; The second preset condition is that the indoor air quality value and the outdoor air quality value are both greater than the first predetermined value, the outdoor air quality value is less than or equal to the second predetermined value, and the indoor air quality value is greater than the outdoor air quality value; The third preset condition is that the indoor air quality value is greater than the first predetermined value, and the outdoor air quality value is less than or equal to the first predetermined value.

3. The control method of the fresh air air conditioner according to claim 2, characterized in that: After adjusting the air intake fan and the exhaust fan to a low wind speed, the method further comprises: When the air conditioner is in cooling mode, obtain the indoor set temperature and outdoor temperature; Determining whether the outdoor temperature is greater than the indoor set temperature; If the outdoor temperature is greater than the indoor set temperature, determining whether the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference; If the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference, the exhaust fan is turned off and the air speed of the inlet fan is kept unchanged; If the temperature difference between the outdoor temperature and the indoor set temperature is less than or equal to the predetermined temperature difference, the wind speed of the air inlet fan and the exhaust fan are kept unchanged; If the outdoor temperature is less than or equal to the indoor set temperature, the wind speeds of the air inlet fan and the exhaust fan are kept unchanged.

4. The control method of the fresh air air conditioner according to claim 2, characterized in that: After adjusting the air intake fan and the exhaust fan to a low wind speed, the method further comprises: When the air conditioner is in heating mode, obtain the indoor set temperature and outdoor temperature; Determining whether the outdoor temperature is lower than the indoor set temperature; If the outdoor temperature is lower than the indoor set temperature, determining whether the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference; If the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference, the exhaust fan is turned off and the air speed of the inlet fan is kept unchanged; If the temperature difference between the outdoor temperature and the indoor set temperature is less than or equal to the predetermined temperature difference, the wind speed of the air inlet fan and the exhaust fan are kept unchanged; If the outdoor temperature is greater than or equal to the indoor set temperature, the wind speeds of the air inlet fan and the exhaust fan are kept unchanged.

5. The control method of the fresh air air conditioner according to claim 2, characterized in that: After adjusting the air intake fan and the exhaust fan to the medium wind speed, the following steps are included: When the air conditioner is in cooling mode, obtain the indoor set temperature and outdoor temperature; Determining whether the outdoor temperature is greater than the indoor set temperature; If the outdoor temperature is greater than the indoor set temperature, determining whether the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference; If the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference, the air inlet fan is lowered to a low wind speed and the air outlet fan speed is kept unchanged; If the temperature difference between the outdoor temperature and the indoor set temperature is less than or equal to the predetermined temperature difference, the air speed of the air inlet fan and the air exhaust fan are kept unchanged; If the outdoor temperature is less than or equal to the indoor set temperature, the air intake fan and the exhaust fan are raised to a high wind speed.

6. The control method of the fresh air air conditioner according to claim 2, characterized in that: After adjusting the air intake fan and the exhaust fan to the medium wind speed, the following steps are included: When the air conditioner is in heating mode, obtain the indoor set temperature and outdoor temperature; Determining whether the outdoor temperature is lower than the indoor set temperature; If the outdoor temperature is lower than the indoor set temperature, determining whether the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference; If the temperature difference between the outdoor temperature and the indoor set temperature is greater than a predetermined temperature difference, the air inlet fan is lowered to a low wind speed and the air outlet fan speed is kept unchanged; If the temperature difference between the outdoor temperature and the indoor set temperature is less than or equal to the predetermined temperature difference, the air speed of the air inlet fan and the air exhaust fan are kept unchanged; If the outdoor temperature is greater than or equal to the indoor set temperature, the air intake fan and the exhaust fan are raised to a high wind speed.

7. The control method of the fresh air air conditioner according to claim 1, characterized in that: The indoor air quality value and the outdoor air quality value are calculated based on the obtained concentrations of multiple indoor pollutants and the obtained concentrations of multiple outdoor pollutants, respectively, including: Calculate the corresponding indoor sub-index of pollutants based on the concentrations of multiple indoor pollutants; The maximum value among all indoor sub-indices is determined as the indoor air quality value; Calculate the outdoor sub-index of the corresponding pollutants according to the concentration of multiple outdoor pollutants; The maximum value among all outdoor sub-indices is determined as the outdoor air quality value.

8. The control method of the fresh air air conditioner according to claim 1, characterized in that: The pollutants include at least one of carbon dioxide, dust particles, formaldehyde, combustible gas and toxic gas.

9. A control device for a fresh air air conditioner, characterized in that: include: a calculation unit, configured to calculate an indoor air quality value and an outdoor air quality value according to the obtained concentrations of the plurality of indoor pollutants and the plurality of outdoor pollutants; a comparing unit, configured to compare the indoor air quality value with a first predetermined value and a second predetermined value, respectively, to obtain a first comparison result, and to compare the outdoor air quality value with the first predetermined value and the second predetermined value, respectively, to obtain a second comparison result; wherein the second predetermined value is greater than the first predetermined value; a judgment unit, configured to judge whether the first comparison result and the second comparison result satisfy a preset condition; wherein the preset condition includes a first preset condition, a second preset condition, and a third preset condition; The adjustment unit is used to turn off the air intake fan and the exhaust fan if a first preset condition is met; adjust the air intake fan and the exhaust fan to a low wind speed if a second preset condition is met; and adjust the air intake fan and the exhaust fan to a medium wind speed if a third preset condition is met.

10. An air conditioner comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein: When the processor executes the computer program, the control method of the fresh air air conditioner according to any one of claims 1 to 8 is implemented.

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