Control method of fresh air device, storage medium, and fresh air device

Abstract

The present invention discloses a control method, storage medium and fresh air device of a fresh air device, wherein the fresh air device includes an adsorption rotor, an exhaust side fan, an air supply side fan, a return air duct and a fresh air duct, the exhaust side fan is arranged in the return air duct, for guiding the indoor return air that has passed the adsorption rotor to the outdoors, the air supply side fan is arranged in the fresh air duct, for guiding the outdoor fresh air that has passed the adsorption rotor to the indoor, the adsorption rotor is configured to rotate in the return air duct and the fresh air duct, and is used to exchange sensible heat and latent heat according to the indoor return air and the outdoor fresh air, the fresh air device first obtains characteristic parameters of the indoor and outdoor fresh air, and then calculates the corresponding dew point temperature and the body temperature of the adsorption rotor in the fresh air device, and when it is determined that the adsorption rotor will produce condensation, the fresh air device is controlled, so as to timely prevent condensation from occurring in the device, thereby improving the service life of the fresh air device and the quality of indoor air, and further improving the user experience.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioning, and in particular to a control method, a storage medium, and a fresh air device. Background Art

[0002] When using an air conditioner, the indoor unit is usually in internal recirculation mode. This air circulation mode effectively saves electricity and reduces energy consumption. However, whether in summer or winter, running the air conditioner in internal recirculation mode for an extended period can deteriorate indoor air quality and even affect respiratory health. Therefore, whether in winter or summer, it is necessary to introduce fresh outdoor air into the room to improve indoor air quality and enhance breathing comfort.

[0003] However, after the air conditioner is turned on, since the temperature difference between indoor and outdoor is generally large, condensation often occurs during the process of introducing fresh air. Although there are some measures in related technologies to prevent condensation, their response actions often lag, that is, the anti-condensation operation cannot be performed in time, so condensation is still inevitable. The generation of condensation will affect the service life of the equipment and the air quality, etc., and give users a bad experience. Summary of the Invention

[0004] The present invention aims to at least partially address one of the technical problems in the related art. To this end, one object of the present invention is to provide a control method for a fresh air device that can promptly prevent condensation from occurring in the device, thereby increasing the service life of the fresh air device and the quality of indoor air, and further improving the user experience.

[0005] A second object of the present invention is to provide a computer-readable storage medium.

[0006] The third object of the present invention is to provide a fresh air device.

[0007] The fourth object of the present invention is to provide a fresh air device.

[0008] To achieve the above-mentioned purpose, an embodiment of the first aspect of the present invention proposes a control method for a fresh air device, wherein the fresh air device includes an adsorption rotor, an exhaust side fan, an air supply side fan, a return air duct and a fresh air duct, the exhaust side fan is arranged in the return air duct, and is used to guide the indoor return air passing through the adsorption rotor to the outdoors, the air supply side fan is arranged in the fresh air duct, and the air supply side fan is used to guide the outdoor fresh air passing through the adsorption rotor to the indoor, the adsorption rotor is configured to rotate in the return air duct and the fresh air duct, and is used according to The indoor return air and the outdoor fresh air exchange sensible heat and latent heat, and the control method includes: obtaining characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air; calculating the body temperature and dew point temperature of the adsorption wheel according to the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air; when it is determined that the adsorption wheel will produce condensation according to the body temperature and dew point temperature of the adsorption wheel, controlling the fresh air device to prevent the adsorption wheel from producing condensation when the sensible heat and latent heat are exchanged between the indoor return air and the outdoor fresh air.

[0009] The control method of the fresh air device in the embodiment of the present invention first obtains the characteristic parameters of indoor and outdoor fresh air, and then calculates the corresponding dew point temperature and the body temperature of the adsorption wheel in the fresh air device. When it is determined that the adsorption wheel will produce condensation, the fresh air device is controlled, thereby preventing condensation from occurring in the device in time, thereby increasing the service life of the fresh air device and the quality of indoor air, and further improving the user experience.

[0010] In some embodiments of the present invention, the body temperature of the adsorption wheel includes the body temperature on the fresh air side and the body temperature on the return air side, and the dew point temperature includes the dew point temperature of the outdoor fresh air and the dew point temperature of the indoor return air.

[0011] In some embodiments of the present invention, the characteristic parameters of the outdoor fresh air include the temperature and relative humidity of the outdoor fresh air, and the characteristic parameters of the indoor return air include the temperature of the indoor return air.

[0012] In some embodiments of the present invention, the body temperature and dew point temperature of the adsorption wheel are calculated based on the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air, including: calculating the current sensible heat recovery efficiency of the adsorption wheel based on the temperature of the outdoor fresh air and the temperature of the indoor return air; calculating the fresh air side body temperature of the adsorption wheel based on the current sensible heat recovery efficiency of the adsorption wheel, the temperature of the outdoor fresh air and the temperature of the indoor return air; determining the dew point temperature of the outdoor fresh air based on the temperature of the outdoor fresh air and the relative humidity of the outdoor fresh air.

[0013] In some embodiments of the present invention, determining that the adsorption rotor will produce condensation is based on the body temperature and dew point temperature of the adsorption rotor, including: when the body temperature on the fresh air side of the adsorption rotor is lower than the dew point temperature of the outdoor fresh air, determining that the adsorption rotor will produce condensation.

[0014] In some embodiments of the present invention, the fresh air device is controlled to prevent condensation from being generated when the adsorption wheel recovers sensible heat based on the indoor return air and the outdoor fresh air, including: reducing the rotation speed of the adsorption wheel; updating the sensible heat recovery efficiency of the adsorption wheel based on the rotation speed of the adsorption wheel and the current sensible heat recovery efficiency of the adsorption wheel; and recalculating the fresh air side body temperature of the adsorption wheel based on the updated sensible heat recovery efficiency of the adsorption wheel until the fresh air side body temperature of the adsorption wheel is greater than or equal to the dew point temperature of the outdoor fresh air.

[0015] In some embodiments of the present invention, the control method also includes: when the body temperature on the fresh air side of the adsorption wheel is greater than or equal to the dew point temperature of the outdoor fresh air, maintaining the current rotation speed of the adsorption wheel, and controlling the adsorption wheel to recover sensible heat according to the indoor return air and the outdoor fresh air.

[0016] In some embodiments of the present invention, the fresh air device further includes a heat source, which is disposed in the fresh air duct and is used to heat the outdoor fresh air passing through the adsorption wheel to increase the body temperature of the fresh air side of the adsorption wheel.

[0017] In some embodiments of the present invention, the characteristic parameters of the indoor return air include the temperature and relative humidity of the indoor return air, and the characteristic parameters of the outdoor fresh air include the temperature of the outdoor fresh air.

[0018] In some embodiments of the present invention, the body temperature of the adsorption wheel is calculated based on the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air, including: calculating the current sensible heat recovery efficiency of the adsorption wheel based on the temperature of the outdoor fresh air and the temperature of the indoor return air; calculating the return air side body temperature of the adsorption wheel based on the current sensible heat recovery efficiency of the adsorption wheel, the temperature of the outdoor fresh air and the temperature of the indoor return air; determining the dew point temperature of the indoor return air based on the temperature of the indoor return air and the relative humidity of the indoor return air.

[0019] In some embodiments of the present invention, determining that the adsorption wheel will produce condensation is based on the body temperature and dew point temperature of the adsorption wheel, including: when the body temperature on the return air side of the adsorption wheel is lower than the dew point temperature of the indoor return air, determining that the adsorption wheel will produce condensation.

[0020] In some embodiments of the present invention, the fresh air device is controlled to prevent the adsorption rotor from generating condensation when performing sensible heat recovery based on the indoor return air and the outdoor fresh air, including: determining the return air side body temperature of the adsorption rotor based on the dew point temperature of the indoor return air; calculating the dry-bulb temperature of the outdoor fresh air based on the return air side body temperature of the adsorption rotor, the current sensible heat recovery efficiency of the adsorption rotor and the temperature of the indoor return air; adjusting the heating power of the heat source based on the dry-bulb temperature of the outdoor fresh air, and re-acquiring the temperature of the outdoor fresh air to calculate the return air side body temperature of the adsorption rotor, until the return air side body temperature of the adsorption rotor is greater than or equal to the dew point temperature of the indoor return air.

[0021] In some embodiments of the present invention, the control method also includes: when the return air side body temperature of the adsorption wheel is greater than or equal to the dew point temperature of the indoor return air, maintaining the current heating power of the heat source, and controlling the adsorption wheel to recover sensible heat according to the indoor return air and the outdoor fresh air.

[0022] To achieve the above objectives, the second embodiment of the present invention proposes a computer-readable storage medium on which a control program for a fresh air device is stored. When the control program for the fresh air device is executed by a processor, the control method for the fresh air device according to the above embodiment is implemented.

[0023] The computer-readable storage medium in the embodiment of the present invention executes the control program of the fresh air device stored thereon through the processor, which can prevent condensation from occurring in the device in a timely manner, increase the service life of the fresh air device and the quality of indoor air, and further improve the user experience.

[0024] To achieve the above-mentioned purpose, the third aspect embodiment of the present invention proposes a first fresh air device, including a memory, a processor, and a control program for the fresh air device stored in the memory and runnable on the processor. When the processor executes the control program of the fresh air device, it implements the control method of the fresh air device according to the above embodiment.

[0025] The first fresh air device in the embodiment of the present invention executes the control program of the fresh air device stored in the memory through the processor, which can prevent condensation from occurring in the device in a timely manner, increase the service life of the fresh air device and the quality of indoor air, and further improve the user experience.

[0026] To achieve the above-mentioned purpose, the fourth embodiment of the present invention proposes a second fresh air device, which includes an adsorption rotor, an exhaust side fan, an air supply side fan, a return air duct, a fresh air duct and a control component. The exhaust side fan is arranged in the return air duct, and is used to guide the indoor return air passing through the adsorption rotor to the outdoors. The air supply side fans are all arranged in the fresh air duct, and the air supply side fans are used to guide the outdoor fresh air passing through the adsorption rotor to the indoor room. The adsorption rotor is configured to rotate in the return air duct and the fresh air duct, and is used according to the The indoor return air and the outdoor fresh air exchange sensible heat and latent heat, and the control component is used to: obtain the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air; calculate the body temperature and dew point temperature of the adsorption rotor according to the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air; when it is determined that the adsorption rotor will produce condensation according to the body temperature and dew point temperature of the adsorption rotor, control the fresh air device to prevent the adsorption rotor from producing condensation when the sensible heat and latent heat are exchanged between the indoor return air and the outdoor fresh air.

[0027] The control device of the fresh air device in the embodiment of the present invention includes a control component, which first obtains the characteristic parameters of the indoor and outdoor fresh air, and then calculates the corresponding dew point temperature and the body temperature of the adsorption wheel in the fresh air device. When it is determined that the adsorption wheel will produce condensation, the fresh air device is controlled, thereby being able to prevent condensation from occurring in the device in time, thereby increasing the service life of the fresh air device and the quality of indoor air, and further improving the user experience.

[0028] Additional aspects and advantages of the present invention will be set forth in part in the description which follows and, in part, will be obvious from the description which follows, or may be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 is a schematic structural diagram of a fresh air device according to one embodiment of the present invention;

[0030] Figure 2 This is a flow chart of a method for controlling a fresh air device according to one embodiment of the present invention;

[0031] Figure 3 is a flow chart of a method for controlling a fresh air device according to another embodiment of the present invention;

[0032] Figure 4 is a flow chart of a method for controlling a fresh air device according to another embodiment of the present invention;

[0033] Figure 5 is a flow chart of a method for controlling a fresh air device according to another embodiment of the present invention;

[0034] Figure 6 is a flow chart of a method for controlling a fresh air device according to another embodiment of the present invention;

[0035] Figure 7 is a structural schematic diagram of a first fresh air device according to an embodiment of the present invention;

[0036] Figure 8 2 is a schematic structural diagram of a second fresh air device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0037] The following describes embodiments of the present invention in detail, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, and are not to be construed as limiting the present invention.

[0038] The following describes a control method for a fresh air device, a storage medium, and a fresh air device according to embodiments of the present invention with reference to the accompanying drawings.

[0039] Figure 1 2 is a schematic structural diagram of a fresh air device according to an embodiment of the present invention.

[0040] like Figure 1 As shown, the fresh air device includes an adsorption wheel 1, an exhaust side fan 3, an air supply side fan 4, a return air duct W1 and a fresh air duct W2. The exhaust side fan 3 is arranged in the return air duct W1, and is used to guide the indoor return air passing through the adsorption wheel 1 to the outside. The air supply side fan 4 is arranged in the fresh air duct W2. The air supply side fan 4 is used to guide the outdoor fresh air passing through the adsorption wheel 1 to the indoor room. The adsorption wheel 1 is configured to rotate in the return air duct W1 and the fresh air duct W2, and is used to exchange sensible heat and latent heat according to the indoor return air and the outdoor fresh air. The fresh air device also includes a heat source 2, which is arranged in the fresh air duct W2, and is used to heat the outdoor fresh air passing through the adsorption wheel 1 to increase the fresh air side body temperature of the adsorption wheel.

[0041] See also Figure 1The adsorption rotor 1 is disposed throughout the return air duct W1 and the fresh air duct W2, and the portion of the adsorption rotor 1 disposed in the return air duct W1 serves as the return air side body of the adsorption rotor, while the portion of the adsorption rotor 1 disposed in the fresh air duct W2 serves as the fresh air side body of the adsorption rotor. The adsorption rotor 1 is capable of rotating in the return air duct W1 and the fresh air duct W2. The adsorption rotor 1 is provided with a material capable of absorbing heat and cold. When an air conditioner is used indoors, the indoor temperature will differ greatly from the outdoor temperature. At the same time, in order to improve the indoor air quality, outdoor fresh air has to be introduced into the room. Therefore, the temperature difference between the indoor return air and the outdoor fresh air can be reduced by the adsorption rotor 1, thereby achieving an energy-saving effect. Specifically, taking winter heating as an example, when the air conditioner is in heating mode, the indoor temperature is generally higher than the outdoor temperature. Therefore, after the indoor return air passes through the return air side of the adsorption rotor 1, the adsorption rotor 1 can absorb the heat in the indoor return air. Then, when the return air side of the adsorption rotor 1, which has absorbed the heat of the indoor return air, rotates to the fresh air duct W2, the outdoor fresh air can bring the heat back into the room, thereby introducing fresh air to ensure air quality and preventing excessive indoor heat loss. It is understandable that when the air conditioner is cooling in the summer, the adsorption rotor 1 can also recover the cold energy in the indoor return air and then return it to the room with the outdoor fresh air.

[0042] It should be noted that when recovering heat in winter, the dew point of the indoor return air is generally 5-8°C, while the outdoor air temperature is often below 0°C. Therefore, when the indoor and outdoor air exchange energy in the adsorption wheel, condensation is easily generated, which in turn reduces the service life of the wheel and the air quality. When recovering cold energy in summer, the dew point of the outdoor fresh air is generally above 26°C, while the indoor air temperature is generally maintained between 20-27°C. At this time, when the indoor and outdoor air exchange energy in the adsorption wheel, condensation is also easily generated, which also reduces the service life of the wheel and the air quality.

[0043] Figure 2 1 is a flow chart of a method for controlling a fresh air device according to an embodiment of the present invention.

[0044] In order to prevent the condensation caused by the above energy conversion, Figure 2 As shown, the present invention proposes a control method for a fresh air device, which includes the following steps:

[0045] S10, obtaining characteristic parameters of outdoor fresh air and characteristic parameters of indoor return air.

[0046] Specifically, in this embodiment, the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air are obtained for subsequent calculation of the body temperature of the adsorption wheel and the dew point temperature of the return air or fresh air, thereby taking preventive measures in advance. More specifically, in this embodiment, the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air can both be detected and obtained by sensors. For example, when the characteristic parameters are temperature and humidity, a temperature and humidity sensor can be set near the outdoor fresh air outlet in the fresh air device, and then the characteristic parameters of the outdoor fresh air can be detected by the temperature and humidity sensor, that is, the temperature and humidity of the outdoor fresh air can be detected. Similarly, a temperature and humidity sensor can be set near the indoor return air outlet in the fresh air device, and then the characteristic parameters of the indoor return air can be detected by the temperature and humidity sensor, that is, the temperature and humidity of the indoor return air can be detected.

[0047] It should be noted that, in this embodiment, characteristic parameters of outdoor fresh air and indoor return air may also be obtained through other devices or other methods, and this embodiment does not limit the specific acquisition method.

[0048] S20, calculating the body temperature and dew point temperature of the adsorption wheel according to the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air.

[0049] Specifically, after obtaining and determining the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air, the body temperature of the adsorption wheel and the corresponding dew point temperature can be calculated and determined. It should be noted that the dew point temperature includes the dew point temperature of the outdoor fresh air and the dew point temperature of the indoor return air. Specifically, the dew point temperature of the outdoor fresh air or the dew point temperature of the indoor return air can be determined based on the temperature difference between indoor and outdoor. For example, in winter, the indoor temperature is higher than the outdoor temperature, so condensation is easily generated when the indoor return air is discharged to the outdoors, so the dew point temperature of the indoor return air can be calculated and determined for subsequent preventive operations; in summer, the indoor temperature is lower than the outdoor temperature, so condensation is easily generated when the outdoor fresh air is sent to the indoors, so the dew point temperature of the outdoor fresh air can be calculated and determined for subsequent preventive operations. In addition, the body temperature of the adsorption wheel in this embodiment includes the body temperature of the fresh air side and the body temperature of the return air side, that is, Figure 1 The temperature of the adsorption wheel part placed in the fresh air duct W2 and the temperature of the adsorption wheel part placed in the return air duct W1 are shown.

[0050] S30, when it is determined based on the body temperature and dew point temperature of the adsorption rotor that condensation will occur on the adsorption rotor, the fresh air device is controlled to prevent condensation from occurring when the adsorption rotor exchanges sensible heat and latent heat between the indoor return air and the outdoor fresh air.

[0051] Specifically, in this embodiment, the body temperature of the adsorption rotor on the fresh air side can be compared with the dew point temperature of the outdoor fresh air to determine whether condensation will occur on the fresh air side of the adsorption rotor. Furthermore, the body temperature of the adsorption rotor on the return air side can be compared with the dew point temperature of the indoor return air to determine whether condensation will occur on the return air side of the adsorption rotor. When it is determined that condensation will occur on the adsorption rotor, the fresh air device is controlled to promptly prevent condensation from occurring. This ensures that condensation does not occur on the adsorption rotor during the process of exchanging sensible heat and latent heat between the indoor return air and the outdoor fresh air, thereby improving the service life of the adsorption rotor and the air quality.

[0052] In one embodiment of the present invention, the characteristic parameters of outdoor fresh air include the temperature and relative humidity of the outdoor fresh air, and the characteristic parameters of indoor return air include the temperature of the indoor return air. The body temperature and dew point temperature of the adsorption wheel are calculated based on the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air, including: calculating the current sensible heat recovery efficiency of the adsorption wheel based on the temperature of the outdoor fresh air and the temperature of the indoor return air; calculating the fresh air side body temperature of the adsorption wheel based on the current sensible heat recovery efficiency of the adsorption wheel, the temperature of the outdoor fresh air and the temperature of the indoor return air; and determining the dew point temperature of the outdoor fresh air based on the temperature of the outdoor fresh air and the relative humidity of the outdoor fresh air.

[0053] Specifically, this embodiment can be applied to summer, that is, when the air conditioner is in cooling mode. In this case, the current sensible heat recovery efficiency of the adsorption wheel can be determined by calculating the temperature of the outdoor fresh air and the temperature of the indoor return air. The specific calculation formula is: η summer-1 =η2+k2(T OA -T RA -8), where η summer-1 is the current sensible heat recovery efficiency of the adsorption wheel, η2 is the sensible heat recovery efficiency of the adsorption wheel in summer under the international prescribed working conditions, which can be obtained through experimental data testing. It should be noted that, under the international prescribed working conditions in this embodiment, the dry-bulb temperature of the indoor return air is 27°C, the wet-bulb temperature of the indoor return air is 19.5°C, the dry-bulb temperature of the outdoor fresh air is 35°C, and the wet-bulb temperature of the outdoor fresh air is 28°C. In the above formula, 8 is the difference between the dry-bulb temperature of the outdoor fresh air and the dry-bulb temperature of the indoor return air, and the value range of the preset parameter k2 can be (0, 0.001). T OA Indicates the temperature of outdoor fresh air, T RA Indicates the temperature of indoor return air.

[0054] After determining the current sensible heat recovery efficiency η of the adsorption wheel summer-1After that, the fresh air side body temperature of the adsorption wheel can be further calculated based on the current sensible heat recovery efficiency, the temperature of the outdoor fresh air and the temperature of the indoor return air. Specifically, the indoor supply air temperature can be calculated based on the current sensible heat recovery efficiency, the temperature of the outdoor fresh air and the temperature of the indoor return air. The specific calculation formula is: T SA =η summer-1 T RA +(1-η summer-1 )T OA , where T SA Indicates the temperature of the indoor supply air. After calculating the temperature of the indoor supply air, the outdoor exhaust air temperature can be calculated based on the indoor supply air temperature, the outdoor fresh air temperature and the indoor return air temperature. The specific calculation formula is T EA =T RA +T OA -T SA , where T EA Indicates the temperature of outdoor exhaust air. After determining the temperature of outdoor exhaust air, the temperature of the fresh air side of the adsorption wheel can be further determined. The specific calculation formula is Tb2=β×T EA , where the value range of the preset parameter β is (0.9, 1), and Tb2 represents the body temperature on the fresh air side of the adsorption wheel.

[0055] While determining the body temperature of the fresh air side of the adsorption wheel, the dew point temperature of the outdoor fresh air can also be determined simultaneously. The dew point temperature of the outdoor fresh air can be obtained by looking up a table based on the temperature of the outdoor fresh air and the relative humidity of the outdoor fresh air.

[0056] After calculating the fresh air side body temperature of the adsorption wheel and determining the dew point temperature of the outdoor fresh air, the two temperatures can be compared to determine whether the adsorption wheel will produce condensation. Specifically, if the fresh air side body temperature Tb2 of the adsorption wheel is lower than the dew point temperature Tp2 of the outdoor fresh air, it can be determined that the fresh air side body of the adsorption wheel will produce condensation, and the fresh air device needs to be controlled to prevent condensation from occurring on the fresh air side body of the adsorption wheel.

[0057] In this embodiment, if Figure 3 As shown, the fresh air device is controlled to prevent condensation when the adsorption wheel recovers sensible heat based on indoor return air and outdoor fresh air, including:

[0058] S301, reducing the rotation speed of the adsorption wheel.

[0059] Specifically, during the cooling process of the air conditioner in summer, the heat exchange efficiency can be changed by adjusting the rotation speed of the adsorption wheel. It can be understood that the greater the rotation speed of the adsorption wheel, the higher the heat exchange efficiency. When the adsorption wheel does not rotate, no heat exchange is performed, the indoor return air is directly discharged to the outside, and the outdoor fresh air is directly sent to the indoor room.

[0060] The reason why condensation occurs on the fresh air side of the adsorption wheel in this embodiment is that the adsorption wheel is cooled by the indoor return air in the return air duct, and its temperature is already lower than the dew point temperature of the outdoor fresh air. Therefore, after the return air side body of the adsorption wheel rotates to the fresh air duct, as soon as the outdoor fresh air passes through the adsorption wheel, condensation will occur on the fresh air side body of the adsorption wheel. Therefore, in this embodiment, the rotation speed of the adsorption wheel is reduced, and the return air side body of the adsorption wheel after cooling can reach the fresh air side body more slowly, so as to appropriately increase the temperature of the adsorption wheel rotating to the fresh air side, thereby preventing the adsorption wheel from generating condensation on the fresh air side.

[0061] S302 : updating the sensible heat recovery efficiency of the adsorption wheel according to the rotation speed of the adsorption wheel and the current sensible heat recovery efficiency of the adsorption wheel.

[0062] Specifically, after reducing the rotation speed of the adsorption wheel, this embodiment can also calculate the adjusted sensible heat recovery efficiency of the adsorption wheel according to the rotation speed of the adsorption wheel and the current sensible heat recovery efficiency of the adsorption wheel. Specifically, it can be calculated by the following formula: Among them, η summer-2 represents the sensible heat recovery efficiency of the adjusted adsorption wheel, R represents the rotation speed of the adsorption wheel, and m represents the preset parameter, and its value range is (5, 30).

[0063] S303 , recalculating the fresh air side body temperature of the adsorption wheel according to the updated sensible heat recovery efficiency of the adsorption wheel until the fresh air side body temperature of the adsorption wheel is greater than or equal to the dew point temperature of the outdoor fresh air.

[0064] Specifically, each time the sensible heat recovery efficiency of the adsorption wheel is adjusted, the following formula T can be used: SA =η summer-1 T RA +(1-η summer-1 )T OA、 T EA =T RA +T OA -T SA , Tb2=β×T EARecalculate the fresh air body temperature of the adsorption wheel. It is understandable that if the recalculated fresh air body temperature of the adsorption wheel is still lower than the dew point temperature of the outdoor fresh air, the speed of the adsorption wheel can be further reduced, and the fresh air body temperature of the adsorption wheel can be recalculated until the fresh air side body temperature of the adsorption wheel is greater than or equal to the dew point temperature of the outdoor fresh air, which means that when the outdoor fresh air is introduced into the room, no condensation will occur, and the speed control of the adsorption wheel can be stopped. It should be noted that in this embodiment, the speed of the adsorption wheel adjusted each time can be determined specifically according to the difference between the fresh air body temperature of the adsorption wheel and the dew point temperature of the outdoor fresh air. If the difference is negative, the speed is adjusted. The larger the difference, the greater the change in the speed. The smaller the difference, the smaller the change in the speed. If the difference is non-negative, the current speed is kept unchanged.

[0065] like Figure 4 As shown, the above embodiment is summarized with a specific embodiment. First, the indoor return air temperature, the indoor fresh air temperature, and the outdoor fresh air relative humidity are obtained. Then, the current sensible heat recovery efficiency of the adsorption rotor is calculated based on the indoor return air temperature and the outdoor fresh air temperature. Then, the fresh air side body temperature of the adsorption rotor is inferred based on the current sensible heat recovery efficiency. The outdoor fresh air relative humidity is combined with the outdoor fresh air temperature to calculate the outdoor fresh air dew point temperature. The fresh air side body temperature of the adsorption rotor and the outdoor fresh air dew point temperature are compared. If the fresh air side body temperature of the adsorption rotor is lower than the outdoor fresh air dew point temperature, the speed of the adsorption rotor corresponding to the absence of condensation is further calculated. Then, the speed of the adsorption rotor is controlled to be reduced to reduce the sensible heat recovery efficiency of the adsorption rotor. The fresh air side body temperature of the adsorption rotor is recalculated based on the sensible heat recovery efficiency of the adsorption rotor and is recompared with the outdoor fresh air dew point temperature. Until the fresh air side body temperature is greater than or equal to the outdoor fresh air dew point temperature, the current speed of the adsorption rotor is maintained, and the adsorption rotor can be controlled to start the full heat recovery mode.

[0066] In another embodiment of the present invention, the characteristic parameters of indoor return air include the temperature and relative humidity of the indoor return air, and the characteristic parameters of outdoor fresh air include the temperature of the outdoor fresh air. The body temperature of the adsorption wheel is calculated based on the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air, including: calculating the current sensible heat recovery efficiency of the adsorption wheel based on the temperature of the outdoor fresh air and the temperature of the indoor return air; calculating the return air side body temperature of the adsorption wheel based on the current sensible heat recovery efficiency of the adsorption wheel, the temperature of the outdoor fresh air and the temperature of the indoor return air; and determining the dew point temperature of the indoor return air based on the temperature of the indoor return air and the relative humidity of the indoor return air.

[0067] Specifically, this embodiment can be applied in winter, that is, the air conditioner is in the heating mode. In this case, the current sensible heat recovery efficiency of the adsorption wheel can be calculated by the temperature of the outdoor fresh air and the temperature of the indoor return air. The specific calculation formula is: η winter =η1+k1(T RA -T OA -19), where η winter is the current sensible heat recovery efficiency of the adsorption wheel, η1 is the sensible heat recovery efficiency of the adsorption wheel in winter under the international prescribed working conditions, which can be obtained through experimental data testing. It should be noted that, under the international prescribed working conditions in this embodiment, the dry-bulb temperature of the indoor return air is 21°C, the wet-bulb temperature of the indoor return air is 12°C, the dry-bulb temperature of the outdoor fresh air is 2°C, and the wet-bulb temperature of the outdoor fresh air is 1°C. 19 in the above formula is the difference between the dry-bulb temperature of the indoor return air and the dry-bulb temperature of the outdoor fresh air, and the value range of the preset parameter k1 can be (0, 0.001), T OA Indicates the temperature of outdoor fresh air, T RA Indicates the temperature of indoor return air.

[0068] After determining the current sensible heat recovery efficiency η of the adsorption wheel winter After that, the fresh air side body temperature of the adsorption wheel can be further calculated based on the current sensible heat recovery efficiency, the temperature of the outdoor fresh air and the temperature of the indoor return air. Specifically, the indoor supply air temperature can be calculated based on the current sensible heat recovery efficiency, the temperature of the outdoor fresh air and the temperature of the indoor return air. The specific calculation formula is: T SA =η winter T RA +(1-η winter )T OA , where T SA Indicates the temperature of the indoor supply air. After calculating the temperature of the indoor supply air, the return air side body temperature of the adsorption wheel can be determined according to the temperature of the indoor supply air. The specific calculation formula is Tb1 = α × T SA , where the value range of the preset parameter α is (0.9, 1), and Tb1 represents the return air side body temperature of the adsorption wheel.

[0069] While determining the return air side body temperature of the adsorption wheel, the dew point temperature of the indoor return air can also be determined simultaneously. The dew point temperature of the indoor return air can be obtained by looking up a table based on the indoor return air temperature and the relative humidity of the indoor return air.

[0070] After calculating the return air side body temperature of the adsorption wheel and determining the dew point temperature of the indoor return air, the two temperatures can be compared to determine whether the adsorption wheel will produce condensation. Specifically, if the return air side body temperature Tb1 of the adsorption wheel is lower than the dew point temperature Tp1 of the indoor return air, it can be determined that the return air side body of the adsorption wheel will produce condensation, and the return air device needs to be controlled to prevent condensation from occurring on the return air side body of the adsorption wheel.

[0071] In this embodiment, if Figure 5 As shown, the fresh air device is controlled to prevent condensation when the adsorption wheel recovers sensible heat based on indoor return air and outdoor fresh air, including:

[0072] S501, determining a target temperature of the return air side body of the adsorption wheel according to the dew point temperature of the indoor return air.

[0073] Specifically, after determining that the return air side body temperature of the adsorption wheel is lower than the dew point temperature of the indoor return air, in order to prevent condensation on the adsorption wheel, the dew point temperature of the indoor return air can be used as the return air side body target temperature of the adsorption wheel. Of course, a temperature higher than the dew point temperature of the indoor return air can also be used as the return air side body target temperature of the adsorption wheel in order to prevent condensation. However, the lower the temperature, the lower the energy consumption. Therefore, in this embodiment, the dew point temperature of the indoor return air can be directly used as the return air side body target temperature of the adsorption wheel.

[0074] S502 , calculating the target dry-bulb temperature of the outdoor fresh air according to the target temperature of the return air side of the adsorption wheel, the current sensible heat recovery efficiency of the adsorption wheel, and the temperature of the indoor return air.

[0075] Specifically, after obtaining the target temperature of the return air side of the adsorption station wheel, the target dry-bulb temperature of the outdoor fresh air can be calculated by combining the current sensible heat recovery efficiency of the adsorption wheel and the temperature of the indoor return air, that is, the formula Tb1 = α × T SA′ Calculate the indoor air supply temperature, and then use the formula T SA′ =η winter T RA +(1-η winter )T OA′ Calculate the target dry bulb temperature T of outdoor fresh air OA′ .

[0076] S503, adjust the heating power of the heat source according to the target dry-bulb temperature of the outdoor fresh air, and re-acquire the real-time temperature of the outdoor fresh air to calculate the real-time temperature of the return air side of the adsorption wheel, until the real-time temperature of the return air side of the adsorption wheel is greater than or equal to the dew point temperature of the indoor return air.

[0077] Specifically, after calculating the target dry-bulb temperature of the outdoor fresh air, the Figure 1 The heating power of heat source 2 enables heat source 2 to heat the passing outdoor fresh air to a temperature equal to the target dry-bulb temperature of the outdoor fresh air, so that the return air side body temperature of the adsorption wheel can reach the corresponding target temperature, thereby preventing condensation from occurring on the adsorption wheel.

[0078] During the process of controlling the heating power of the heat source, the temperature of the outdoor fresh air can be continuously obtained. The real-time temperature of the return air side of the adsorption rotor can then be calculated based on the temperature and relative humidity of the indoor return air. This temperature is determined to be greater than or equal to the dew point temperature of the indoor return air, indicating that condensation will not occur on the adsorption rotor. In some embodiments, when the return air side temperature of the adsorption rotor is greater than or equal to the dew point temperature of the indoor return air, the current heating power of the heat source is maintained, and the adsorption rotor is controlled to recover sensible heat from the indoor return air and the outdoor fresh air.

[0079] like Figure 4 As shown, the above embodiment is summarized with a specific embodiment. First, the outdoor fresh air temperature, the indoor return air temperature and the relative humidity of the indoor return air are obtained. Then, the current sensible heat recovery efficiency of the adsorption rotor is calculated based on the outdoor fresh air temperature and the indoor return air temperature. Then, the return air side body temperature of the adsorption rotor is inferred based on the current sensible heat recovery efficiency. The dew point temperature of the indoor return air is calculated based on the relative humidity of the indoor return air in combination with the indoor return air temperature. The return air side body temperature of the adsorption rotor and the dew point temperature of the indoor return air are compared. If the return air side body temperature of the adsorption rotor is lower than the dew point temperature of the indoor return air, the target dry-bulb temperature of the outdoor fresh air corresponding to the absence of condensation is further calculated. Then, the heating power of the heat source is adjusted based on the target dry-bulb temperature of the outdoor fresh air to increase the temperature of the outdoor fresh air. The real-time return air side body temperature of the adsorption rotor is recalculated based on the outdoor fresh air and compared with the dew point temperature of the indoor return air until the real-time return air side body temperature of the adsorption rotor is higher than the dew point temperature of the indoor return air. Then, the adsorption rotor can be controlled to start the full heat recovery mode.

[0080] In summary, the control method of the fresh air device in the embodiment of the present invention can timely prevent condensation from occurring in the device, thereby increasing the service life of the fresh air device and the quality of indoor air, and further improving the user experience.

[0081] Furthermore, the present invention proposes a computer-readable storage medium on which a control program for a fresh air device is stored. When the control program for the fresh air device is executed by a processor, the control method for the fresh air device according to the above embodiment is implemented.

[0082] The computer-readable storage medium of an embodiment of the present invention executes the control program of the fresh air device stored thereon through a processor, which can prevent condensation from occurring in the device in a timely manner, increase the service life of the fresh air device and the quality of indoor air, and further improve the user experience.

[0083] Figure 7 2 is a schematic structural diagram of a first fresh air device according to an embodiment of the present invention.

[0084] Furthermore, if Figure 7 As shown, the present invention proposes a first fresh air device 100, which includes a memory 101, a processor 102, and a control program for the fresh air device stored in the memory 101 and runnable on the processor 102. When the processor 102 executes the control program for the fresh air device, it implements the control method for the fresh air device according to the above embodiment.

[0085] The first type of fresh air device in this embodiment executes the control program of the fresh air device stored in the memory through the processor, which can prevent condensation from occurring in the device in a timely manner, increase the service life of the fresh air device and the quality of indoor air, and further improve the user experience.

[0086] Figure 8 2 is a schematic structural diagram of a second fresh air device according to an embodiment of the present invention.

[0087] Furthermore, if Figure 8 As shown, the present invention proposes a second fresh air device 200, which includes an adsorption rotor 1, an exhaust side fan 3, an air supply side fan 4, a return air duct W1, a fresh air duct W2 and a control component 201. The exhaust side fan 3 is arranged in the return air duct W1 and is used to guide the indoor return air passing through the adsorption rotor 1 to the outside. The air supply side fan 4 is arranged in the fresh air duct W2. The air supply side fan 3 is used to guide the outdoor fresh air passing through the adsorption rotor 1 to the indoor. The adsorption rotor 1 is configured to be between the return air duct W1 and the fresh air duct. W2 rotates and is used to exchange sensible heat and latent heat according to indoor return air and outdoor fresh air. The control component 201 is used to: obtain the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air; calculate the body temperature and dew point temperature of the adsorption wheel according to the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air; when it is determined that the adsorption wheel will produce condensation according to the body temperature and dew point temperature of the adsorption wheel, the fresh air device is controlled to prevent the adsorption wheel from producing condensation when exchanging sensible heat and latent heat according to the indoor return air and the outdoor fresh air.

[0088] In some embodiments of the present invention, the body temperature of the adsorption wheel includes the body temperature on the fresh air side and the body temperature on the return air side, and the dew point temperature includes the dew point temperature of the outdoor fresh air and the dew point temperature of the indoor return air.

[0089] In some embodiments of the present invention, the characteristic parameters of outdoor fresh air include the temperature and relative humidity of the outdoor fresh air, and the characteristic parameters of indoor return air include the temperature of the indoor return air.

[0090] In some embodiments of the present invention, the control component is also used to: calculate the current sensible heat recovery efficiency of the adsorption wheel based on the temperature of the outdoor fresh air and the temperature of the indoor return air; calculate the fresh air side body temperature of the adsorption wheel based on the current sensible heat recovery efficiency of the adsorption wheel, the temperature of the outdoor fresh air and the temperature of the indoor return air; determine the dew point temperature of the outdoor fresh air based on the temperature of the outdoor fresh air and the relative humidity of the outdoor fresh air.

[0091] In some embodiments of the present invention, the control component is further configured to determine that the adsorption wheel will generate condensation when the body temperature of the adsorption wheel on the fresh air side is lower than the dew point temperature of the outdoor fresh air.

[0092] In some embodiments of the present invention, the control component is also used to: reduce the rotational speed of the adsorption wheel; update the sensible heat recovery efficiency of the adsorption wheel based on the rotational speed of the adsorption wheel and the current sensible heat recovery efficiency of the adsorption wheel; recalculate the fresh air side body temperature of the adsorption wheel based on the updated sensible heat recovery efficiency of the adsorption wheel until the fresh air side body temperature of the adsorption wheel is greater than or equal to the dew point temperature of the outdoor fresh air.

[0093] In some embodiments of the present invention, the control component is also used to: maintain the current speed of the adsorption wheel when the body temperature on the fresh air side of the adsorption wheel is greater than or equal to the dew point temperature of the outdoor fresh air, and control the adsorption wheel to recover sensible heat according to the indoor return air and outdoor fresh air.

[0094] In some embodiments of the present invention, the fresh air device further includes a heat source, which is disposed in the fresh air duct and is used to heat the outdoor fresh air passing through the adsorption wheel to increase the body temperature of the fresh air side of the adsorption wheel.

[0095] In some embodiments of the present invention, the characteristic parameters of the indoor return air include the temperature and relative humidity of the indoor return air, and the characteristic parameters of the outdoor fresh air include the temperature of the outdoor fresh air.

[0096] In some embodiments of the present invention, the control component is also used to: calculate the current sensible heat recovery efficiency of the adsorption wheel based on the temperature of the outdoor fresh air and the temperature of the indoor return air; calculate the return air side body temperature of the adsorption wheel based on the current sensible heat recovery efficiency of the adsorption wheel, the temperature of the outdoor fresh air and the temperature of the indoor return air; determine the dew point temperature of the indoor return air based on the temperature of the indoor return air and the relative humidity of the indoor return air.

[0097] In some embodiments of the present invention, the control component is further configured to: determine that the adsorption wheel will generate condensation when the return air side body temperature of the adsorption wheel is lower than the dew point temperature of the indoor return air.

[0098] In some embodiments of the present invention, the control component is also used to: determine the target temperature of the return air side body of the adsorption wheel based on the dew point temperature of the indoor return air; calculate the target dry-bulb temperature of the outdoor fresh air based on the target temperature of the return air side body of the adsorption wheel, the current sensible heat recovery efficiency of the adsorption wheel and the temperature of the indoor return air; adjust the heating power of the heat source according to the target dry-bulb temperature of the outdoor fresh air, and re-acquire the real-time temperature of the outdoor fresh air to calculate the real-time temperature of the return air side body of the adsorption wheel, until the real-time temperature of the return air side body of the adsorption wheel is greater than or equal to the dew point temperature of the indoor return air.

[0099] In some embodiments of the present invention, the control component is also used to: when the return air side body temperature of the adsorption wheel is greater than or equal to the dew point temperature of the indoor return air, maintain the current heating power of the heat source, and control the adsorption wheel to recover sensible heat according to the indoor return air and outdoor fresh air.

[0100] It should be noted that the specific implementation of the second fresh air device in this embodiment can refer to the specific implementation of the control method of the fresh air device in the above embodiment, which will not be repeated here.

[0101] In summary, the second fresh air device in the embodiment of the present invention can prevent condensation from occurring in the device in a timely manner, thereby increasing the service life of the fresh air device and the quality of indoor air, and further improving the user experience.

[0102] It should be noted that the logic and / or steps represented in the flowcharts or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing the logical functions, and can be embodied in any computer-readable medium for use by an instruction execution system, apparatus, or device (such as a computer-based system, a system including a processor, or other system that can fetch and execute instructions from an instruction execution system, apparatus, or device), or in conjunction with such instruction execution system, apparatus, or device. For the purposes of this specification, a "computer-readable medium" can be any device that can contain, store, communicate, propagate, or transmit a program for use by an instruction execution system, apparatus, or device, or in conjunction with such instruction execution system, apparatus, or device. More specific examples (non-exhaustive list) of computer-readable media include the following: an electrical connection portion having one or more wires (electronic device), a portable computer disk cartridge (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and programmable read-only memory (EPROM or flash memory), fiber optic devices, and portable compact disc read-only memory (CDROM). Furthermore, the computer-readable medium may even be paper or other suitable medium on which the program is printed, since the program may be obtained electronically, for example, by optically scanning the paper or other medium and then editing, interpreting or processing it in another suitable manner if necessary, and then storing it in a computer memory.

[0103] It should be understood that various parts of the present invention can be implemented using hardware, software, firmware, or a combination thereof. In the above-described embodiments, multiple steps or methods can be implemented using software or firmware stored in a memory and executed by a suitable instruction execution system. For example, if implemented using hardware, as in another embodiment, any one of the following technologies known in the art or a combination thereof can be used: a discrete logic circuit having a logic gate circuit for implementing a logic function on a data signal, an application-specific integrated circuit having a suitable combination of logic gate circuits, a programmable gate array (PGA), a field programmable gate array (FPGA), etc.

[0104] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that a specific feature, structure, material, or characteristic described in conjunction with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0105] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0106] In addition, the terms "first" and "second" used in the embodiments of the present invention are only used for descriptive purposes and should not be understood as indicating or implying relative importance, or implicitly indicating the number of technical features indicated in this embodiment. Therefore, the features defined by the terms "first" and "second" in the embodiments of the present invention can explicitly or implicitly indicate that the embodiment includes at least one of such features. In the description of the present invention, the word "plurality" means at least two or two or more, such as two, three, four, etc., unless otherwise clearly and specifically defined in the embodiments.

[0107] In the present invention, unless otherwise clearly specified or limited in the embodiments, the terms "installed," "connected," "connect," and "fixed" appearing in the embodiments should be understood in a broad sense. For example, the connection may be a fixed connection, a detachable connection, or an integral connection. It can also be a mechanical connection, an electrical connection, etc.; of course, it can also be a direct connection, or an indirect connection through an intermediate medium, or it can be internal communication between two elements, or an interaction between two elements. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood based on the specific implementation.

[0108] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0109] Although the embodiments of the present invention have been shown and described above, it will be understood that the above embodiments are illustrative and are not to be construed as limitations on the present invention. A person skilled in the art may change, modify, replace and modify the above embodiments within the scope of the present invention.

Claims

1. A control method for a fresh air device, characterized in that: The fresh air device is applied to an air conditioner, and includes an adsorption rotor, an exhaust side fan, an air supply side fan, a return air duct, and a fresh air duct. The exhaust side fan is arranged in the return air duct, and is used to guide the indoor return air passing through the adsorption rotor to the outside. The air supply side fan is arranged in the fresh air duct, and is used to guide the outdoor fresh air passing through the adsorption rotor to the indoor. The adsorption rotor is configured to rotate in the return air duct and the fresh air duct, and is used to perform sensible heat and latent heat exchange between the indoor return air and the outdoor fresh air. The control method includes: Acquiring characteristic parameters of the outdoor fresh air and characteristic parameters of the indoor return air, wherein the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air represent different parameters when the air conditioner is in different operating conditions; Calculating the body temperature and dew point temperature of the adsorption wheel according to the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air; When it is determined that the adsorption rotor will generate condensation based on the body temperature and dew point temperature of the adsorption rotor, the fresh air device is controlled to prevent the adsorption rotor from generating condensation when performing sensible heat and latent heat exchange between the indoor return air and the outdoor fresh air.

2. The control method according to claim 1, characterized in that: The body temperature of the adsorption wheel includes the body temperature on the fresh air side and the body temperature on the return air side, and the dew point temperature includes the dew point temperature of the outdoor fresh air and the dew point temperature of the indoor return air.

3. The control method according to claim 2, characterized in that: When the air conditioner is in a cooling mode, the characteristic parameters of the outdoor fresh air include the temperature and relative humidity of the outdoor fresh air, and the characteristic parameters of the indoor return air include the temperature of the indoor return air.

4. The control method according to claim 3, characterized in that: Calculating the body temperature and dew point temperature of the adsorption wheel according to the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air includes: Calculating the current sensible heat recovery efficiency of the adsorption wheel according to the temperature of the outdoor fresh air and the temperature of the indoor return air; Calculating the fresh air side body temperature of the adsorption rotor according to the current sensible heat recovery efficiency of the adsorption rotor, the temperature of the outdoor fresh air, and the temperature of the indoor return air; The dew point temperature of the outdoor fresh air is determined according to the temperature of the outdoor fresh air and the relative humidity of the outdoor fresh air.

5. The control method according to claim 4, characterized in that: Determining that condensation will occur on the adsorption rotor according to the body temperature and the dew point temperature of the adsorption rotor includes: When the temperature of the fresh air side body of the adsorption rotor is lower than the dew point temperature of the outdoor fresh air, it is determined that condensation will be generated on the adsorption rotor.

6. The control method according to claim 5, characterized in that: The fresh air device is controlled to prevent condensation from being generated by the adsorption wheel when recovering sensible heat based on the indoor return air and the outdoor fresh air, including: reducing the rotation speed of the adsorption wheel; updating the sensible heat recovery efficiency of the adsorption rotor according to the rotation speed of the adsorption rotor and the current sensible heat recovery efficiency of the adsorption rotor; The fresh air side body temperature of the adsorption rotor is recalculated according to the updated sensible heat recovery efficiency of the adsorption rotor until the fresh air side body temperature of the adsorption rotor is greater than or equal to the dew point temperature of the outdoor fresh air.

7. The control method according to claim 6, characterized in that: The control method further includes: When the body temperature of the adsorption wheel on the fresh air side is greater than or equal to the dew point temperature of the outdoor fresh air, the current rotation speed of the adsorption wheel is maintained, and the adsorption wheel is controlled to recover sensible heat according to the indoor return air and the outdoor fresh air.

8. The control method according to claim 2, characterized in that: The fresh air device further includes a heat source, which is disposed in the fresh air duct and is used to heat the outdoor fresh air passing through the adsorption rotor to increase the temperature of the fresh air side body of the adsorption rotor.

9. The control method according to claim 8, characterized in that: When the air conditioner is in a heating mode, the characteristic parameters of the indoor return air include the temperature and relative humidity of the indoor return air, and the characteristic parameters of the outdoor fresh air include the temperature of the outdoor fresh air.

10. The control method according to claim 9, characterized in that: Calculating the body temperature of the adsorption wheel according to the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air includes: Calculating the current sensible heat recovery efficiency of the adsorption wheel according to the temperature of the outdoor fresh air and the temperature of the indoor return air; Calculating the return air side body temperature of the adsorption rotor according to the current sensible heat recovery efficiency of the adsorption rotor, the temperature of the outdoor fresh air, and the temperature of the indoor return air; The dew point temperature of the indoor return air is determined according to the temperature of the indoor return air and the relative humidity of the indoor return air.

11. The control method according to claim 10, characterized in that: Determining that condensation will occur on the adsorption rotor according to the body temperature and the dew point temperature of the adsorption rotor includes: When the return air side body temperature of the adsorption wheel is lower than the dew point temperature of the indoor return air, it is determined that the adsorption wheel will generate condensation.

12. The control method according to claim 11, characterized in that: The fresh air device is controlled to prevent condensation from being generated by the adsorption wheel when recovering sensible heat based on the indoor return air and the outdoor fresh air, including: Determining a target temperature of the return air side of the adsorption wheel according to the dew point temperature of the indoor return air; Calculating the target dry-bulb temperature of the outdoor fresh air according to the target temperature of the return air side body of the adsorption rotor, the current sensible heat recovery efficiency of the adsorption rotor, and the temperature of the indoor return air; The heating power of the heat source is adjusted according to the target dry-bulb temperature of the outdoor fresh air, and the real-time temperature of the outdoor fresh air is reacquired to calculate the real-time temperature of the return air side body of the adsorption wheel until the real-time temperature of the return air side body of the adsorption wheel is greater than or equal to the dew point temperature of the indoor return air.

13. The control method according to claim 12, characterized in that: The control method further includes: When the return air side body temperature of the adsorption rotor is greater than or equal to the dew point temperature of the indoor return air, the current heating power of the heat source is maintained, and the adsorption rotor is controlled to recover sensible heat according to the indoor return air and the outdoor fresh air.

14. A computer-readable storage medium, characterized in that A control program for the fresh air device is stored thereon, and when the control program for the fresh air device is executed by the processor, a control method for the fresh air device according to any one of claims 1-13 is implemented.

15. A fresh air device, characterized in that: It includes a memory, a processor, and a control program for a fresh air device stored in the memory and runnable on the processor. When the processor executes the control program for the fresh air device, it implements a control method for the fresh air device according to any one of claims 1-13.

16. A fresh air device, characterized in that: The fresh air device is applied to an air conditioner, and includes an adsorption rotor, an exhaust side fan, an air supply side fan, a return air duct, a fresh air duct, and a control component. The exhaust side fan is arranged in the return air duct, and is used to guide the indoor return air passing through the adsorption rotor to the outside. The air supply side fan is arranged in the fresh air duct, and is used to guide the outdoor fresh air passing through the adsorption rotor to the indoor. The adsorption rotor is configured to rotate in the return air duct and the fresh air duct, and is used to exchange sensible heat and latent heat between the indoor return air and the outdoor fresh air. The control component is used to: Acquire characteristic parameters of the outdoor fresh air and characteristic parameters of the indoor return air, wherein the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air represent different parameters when the air conditioner is in different working conditions; calculate the body temperature and dew point temperature of the adsorption rotor according to the characteristic parameters of the outdoor fresh air and the characteristic parameters of the indoor return air; when it is determined that the adsorption rotor will produce condensation according to the body temperature and dew point temperature of the adsorption rotor, control the fresh air device to prevent the adsorption rotor from producing condensation when performing sensible heat and latent heat exchange between the indoor return air and the outdoor fresh air.

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