Fresh air humidity determination method of fresh air device, storage medium, fresh air device

Abstract

This invention discloses a method for determining the humidity of fresh air in a fresh air system, a storage medium, and the fresh air system itself. The method first acquires the temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air. Then, based on the acquired temperature and humidity parameters, the moisture content of the outdoor fresh air is determined. Next, the temperature of the outdoor fresh air is acquired, and a calculated value of the relative humidity of the outdoor fresh air is calculated based on the temperature and moisture content. Finally, a measured value of the relative humidity of the outdoor fresh air is acquired and compared with the calculated value to determine the accurate relative humidity of the outdoor fresh air. Therefore, the method for determining the humidity of fresh air in this embodiment of the invention can accurately determine the relative humidity of the outdoor fresh air, thereby ensuring the normal operation of the fresh air system and improving the user experience.

Description

Technical Field

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

[0002] When air conditioning is on indoors during winter, the indoor air becomes very dry, which can accelerate skin aging and cause a decline in immune function and resistance. Therefore, it is very important to regulate indoor humidity.

[0003] In related technologies, humidity sensors are often installed at outdoor fresh air inlets, and the indoor humidity is adjusted based on the data obtained from these sensors. However, since the humidity sensors at outdoor fresh air inlets are generally in direct contact with the external environment, they are prone to damage, malfunction, or drift, making it impossible to obtain accurate fresh air humidity and thus failing to effectively regulate indoor humidity, severely impacting the user experience. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, the first objective of this invention is to provide a method for determining the relative humidity of fresh air in a fresh air system, which can accurately determine the relative humidity of outdoor fresh air, thereby ensuring the normal operation of the fresh air system and improving the user experience.

[0005] A second objective of this invention is to provide a computer-readable storage medium.

[0006] The third objective of this invention is to propose a first type of fresh air device.

[0007] The fourth objective of this invention is to provide a second type of fresh air device.

[0008] To achieve the above objectives, a first aspect of the present invention provides a method for determining the humidity of fresh air in a fresh air device. The fresh air device includes an adsorption impeller, a heat source, a supply fan, and an exhaust fan. The supply fan is located at an indoor air outlet to deliver outdoor fresh air into the room. The exhaust fan is located at an outdoor exhaust outlet to exhaust indoor return air to the outside. The adsorption impeller is used to recover moisture from the indoor return air and release the moisture back into the room along with the outdoor fresh air. The heat source is located between the outdoor fresh air outlet and the adsorption impeller and is used to heat the outdoor fresh air to form regenerated air. The method includes: acquiring the temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air; determining the moisture content of the outdoor fresh air based on the temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air; acquiring the measured values ​​of the temperature and relative humidity of the outdoor fresh air; calculating the calculated value of the relative humidity of the outdoor fresh air based on the moisture content and temperature of the outdoor fresh air; and determining the relative humidity of the outdoor fresh air based on the calculated value and the measured value of the relative humidity of the outdoor fresh air.

[0009] In this embodiment of the invention, outdoor fresh air passing through a heat source is defined as regenerated air. The temperature of this regenerated air, along with the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air, are acquired. Then, the moisture content of the outdoor fresh air is determined based on the acquired temperature and humidity parameters. Next, the temperature of the outdoor fresh air is acquired, and a calculated value for the relative humidity of the outdoor fresh air is calculated based on the temperature and moisture content. Finally, a measured value for the relative humidity of the outdoor fresh air is acquired and compared with the calculated value to determine the accurate relative humidity of the outdoor fresh air. Therefore, the method for determining the fresh air humidity of the fresh air device in this embodiment of the invention can accurately determine the relative humidity of the outdoor fresh air, thereby ensuring the normal operation of the fresh air device and improving the user experience.

[0010] In some embodiments of the present invention, the method further includes: when the relative humidity measurement value of the outdoor fresh air is not obtained, sending a first prompt message, and determining the relative humidity of the outdoor fresh air based on the calculated relative humidity value of the outdoor fresh air.

[0011] In some embodiments of the present invention, determining the relative humidity of the outdoor fresh air based on the calculated relative humidity value and the measured relative humidity value of the outdoor fresh air includes: when the absolute value of the difference between the calculated relative humidity value and the measured relative humidity value of the outdoor fresh air is less than or equal to a first threshold, determining the relative humidity of the outdoor fresh air based on the measured relative humidity value; and when the absolute value of the difference between the calculated relative humidity value and the measured relative humidity value of the outdoor fresh air is greater than the first threshold, sending a second prompt message, and determining the relative humidity of the outdoor fresh air based on the calculated relative humidity value.

[0012] In some embodiments of the present invention, determining the moisture content of the outdoor fresh air based on the temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air includes: calculating the enthalpy of the indoor return air based on the temperature of the indoor return air and the relative humidity of the indoor return air; obtaining an estimated relative humidity value of the regenerated air, and calculating the enthalpy of the outdoor exhaust air based on the estimated relative humidity value of the regenerated air, the temperature of the regenerated air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air; determining the enthalpy of the regenerated air based on the temperature of the regenerated air, the enthalpy of the indoor return air, and the enthalpy of the outdoor exhaust air; and determining the moisture content of the outdoor fresh air based on the enthalpy of the regenerated air, the temperature of the regenerated air, and the estimated relative humidity value of the regenerated air.

[0013] In some embodiments of the present invention, calculating the enthalpy of the outdoor exhaust air based on the estimated relative humidity of the regenerated air, the temperature of the regenerated air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air includes: determining the dehumidification efficiency of the fresh air device based on the temperature of the regenerated air; calculating the relative humidity of the outdoor exhaust air based on the dehumidification efficiency, the estimated relative humidity of the regenerated air, and the relative humidity of the indoor return air; and calculating the enthalpy of the outdoor exhaust air based on the relative humidity of the outdoor exhaust air and the temperature of the outdoor exhaust air.

[0014] In some embodiments of the present invention, determining the enthalpy of the regenerated air based on the temperature of the regenerated air, the enthalpy of the indoor return air, and the enthalpy of the outdoor exhaust air includes: determining the heat loss on the dehumidification side of the fresh air device based on the temperature of the regenerated air; and calculating the enthalpy of the regenerated air based on the heat loss on the dehumidification side, the enthalpy of the indoor return air, and the enthalpy of the outdoor exhaust air.

[0015] In some embodiments of the present invention, determining the moisture content of the outdoor fresh air based on the enthalpy of the regenerated air, the temperature of the regenerated air, and an estimated relative humidity of the regenerated air includes: calculating a calculated relative humidity value of the regenerated air based on the enthalpy of the regenerated air and the temperature of the regenerated air; when the absolute value of the difference between the calculated relative humidity value of the regenerated air and the estimated relative humidity value of the regenerated air is greater than a second threshold, updating the estimated relative humidity value of the regenerated air based on the calculated relative humidity value of the regenerated air, and recalculating the relative humidity of the outdoor exhaust air based on the updated estimated relative humidity value of the regenerated air; and when the absolute value of the difference between the calculated relative humidity value of the regenerated air and the estimated relative humidity value of the regenerated air is less than or equal to the second threshold, calculating the moisture content of the outdoor fresh air based on the temperature of the regenerated air and the calculated relative humidity value of the regenerated air.

[0016] In some embodiments of the present invention, the method further includes: determining the relative humidity of the outdoor fresh air at preset intervals.

[0017] To achieve the above objectives, a second aspect of the present invention provides a computer-readable storage medium storing a fresh air humidity determination program for a fresh air device, which, when executed by a processor, implements the fresh air humidity determination method for a fresh air device according to the above embodiments.

[0018] The computer-readable storage medium of this invention executes a fresh air humidity determination program stored thereon on the fresh air device through a processor, which can accurately determine the relative humidity of the outdoor fresh air, thereby ensuring that the fresh air device can operate normally and improving the user experience.

[0019] To achieve the above objectives, a third aspect of the present invention provides a first type of fresh air device, which includes a memory, a processor, and a fresh air humidity determination program stored in the memory and executable on the processor. When the processor executes the fresh air humidity determination program, it implements the fresh air humidity determination method of the fresh air device according to the above embodiments.

[0020] The fresh air device in this embodiment of the invention includes a memory and a processor. By executing the fresh air humidity determination program stored in the memory through the processor, the relative humidity of the outdoor fresh air can be accurately determined, thereby ensuring that the fresh air device can operate normally and improving the user experience.

[0021] To achieve the above objectives, a fourth aspect of the present invention provides a second type of fresh air device, which includes an adsorption impeller, a heat source, a supply-side fan, an exhaust-side fan, and a control assembly. The supply-side fan is located at the indoor air inlet and is used to supply outdoor fresh air into the room. The exhaust-side fan is located at the outdoor exhaust inlet and is used to exhaust indoor return air to the outside. The adsorption impeller is used to recover moisture from the indoor return air and release the moisture into the room along with the outdoor fresh air. The heat source is located between the outdoor fresh air inlet and the adsorption impeller and is used to heat the outdoor fresh air to form regenerated air. The control assembly is used for:

[0022] The system acquires the temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air; determines the moisture content of the outdoor fresh air based on the temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air; acquires the measured values ​​of the temperature and relative humidity of the outdoor fresh air; calculates the calculated value of the relative humidity of the outdoor fresh air based on the moisture content and temperature of the outdoor fresh air; and determines the relative humidity of the outdoor fresh air based on the calculated value and the measured value of the relative humidity of the outdoor fresh air.

[0023] In this embodiment of the invention, the control component of the fresh air device acquires the temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air. Then, based on the acquired temperature and humidity parameters, it determines the moisture content of the outdoor fresh air. Next, it acquires the temperature of the outdoor fresh air and calculates its relative humidity based on the temperature and moisture content. Finally, it acquires the measured relative humidity of the outdoor fresh air and compares it with the calculated relative humidity value to determine the accurate relative humidity of the outdoor fresh air. Therefore, the fresh air humidity determination device in this embodiment of the invention can accurately determine the relative humidity of the outdoor fresh air, thereby ensuring the normal operation of the fresh air device and improving the user experience.

[0024] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of a fresh air device according to an embodiment of the present invention;

[0026] Figure 2 A graph showing the air state change trend of fresh air and return air according to an embodiment of the present invention;

[0027] Figure 3This is a flowchart illustrating a method for determining the humidity of fresh air in a fresh air device according to an embodiment of the present invention.

[0028] Figure 4 This is a flowchart illustrating a method for determining the humidity of fresh air in a fresh air device according to a specific embodiment of the present invention.

[0029] Figure 5 This is a schematic diagram of the structure of the first type of fresh air device according to an embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of a second type of fresh air device according to an embodiment of the present invention.

[0031] Figure reference numerals: adsorption rotor 101, heat source 102, supply air side fan 103, exhaust air side fan 104, coarse filter 105, high efficiency filter 106, return air temperature sensor 2, exhaust air temperature sensor 3, fresh air temperature sensor 4, regeneration temperature sensor 5, return air humidity sensor 6, and fresh air humidity sensor 7. Detailed Implementation

[0032] Embodiments of the present invention are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0033] The humidification capacity of the fresh air system is mainly determined based on the indoor humidification load, which in turn is determined based on the indoor and outdoor operating conditions and the ventilation rate. The calculation formula is as follows:

[0034]

[0035] Among them, W Load Indicates the indoor humidification load, expressed in grams per hour [g / h].

[0036] V represents the indoor air volume, measured in cubic meters per hour [m³ / h].

[0037] d set Moisture content of target indoor air, expressed in grams per kilogram of dry air [g / kg(dry)];

[0038] d OA This indicates the moisture content of fresh outdoor air, expressed in grams per kilogram of dry air [g / kg (dry)].

[0039] υ set It represents the specific volume of the target air in the room, with the unit being cubic meters per kilogram of dry air [m3 / kg(dry)].

[0040] υ OA It represents the specific volume of outdoor fresh air, with the unit being cubic meters per kilogram of dry air [m3 / kg(dry)].

[0041] In related technologies, humidity sensors are often installed at outdoor fresh air inlets. However, humidity sensors installed at fresh air inlets are prone to damage, malfunction, or drift. If a humidity sensor installed at a fresh air inlet malfunctions, the entire waterless humidification fresh air unit will not be able to operate normally or will shut down. If a faulty humidity sensor at a fresh air inlet is repaired or replaced, it will affect the user's normal use.

[0042] To address the aforementioned issues, embodiments of the present invention provide a method for determining the relative humidity of fresh air in a fresh air device, a storage medium, and a fresh air device. Using this fresh air device, the relative humidity of the outdoor fresh air can be accurately determined, thereby ensuring the normal operation of the fresh air device and improving the user experience.

[0043] The following description, with reference to the accompanying drawings, describes the method for determining the fresh air humidity, the storage medium, and the fresh air device according to embodiments of the present invention.

[0044] It should be noted that the method for determining the fresh air humidity of the fresh air device in this embodiment of the invention can be applied to, for example... Figure 1 The fresh air system shown (but not limited to this structure). For example... Figure 1As shown, the fresh air system includes an adsorption rotor 101, a heat source 102, a supply air fan 103, an exhaust air fan 104, a coarse filter 105, a high-efficiency filter 106, a return air temperature sensor 2, an exhaust air temperature sensor 3, a fresh air temperature sensor 4, a regeneration temperature sensor 5, a return air humidity sensor 6, and a fresh air humidity sensor 7. OA (Outside Air) represents outdoor fresh air, RA (Return Air) represents indoor return air, SA (Supply Air) represents indoor supply air, and EA (Exhaust Air) represents indoor return air. Air) is used to represent outdoor exhaust air. A supply air fan 103 is installed at the indoor supply air vent to deliver outdoor fresh air OA to the room. An exhaust air fan 104 is installed at the outdoor exhaust vent to exhaust indoor return air RA to the outside. An exhaust air temperature sensor 3 is also installed at the outdoor exhaust vent to detect the temperature of the outdoor exhaust air. An adsorption wheel 101 is used to recover moisture from the indoor return air RA and release the moisture back into the room along with the outdoor fresh air OA. A heat source 102 is installed between the outdoor fresh air vent and the adsorption wheel 101 to heat the outdoor fresh air OA to form regenerated air. The heat source 102 and the outdoor fresh air vent... The high-efficiency filter 106 is used to filter the outdoor fresh air OA. At the outdoor fresh air inlet, a fresh air temperature sensor 4 and a fresh air humidity sensor 7 are also installed in sequence. The fresh air temperature sensor 4 is used to detect the temperature of the outdoor fresh air OA, and the fresh air humidity sensor 7 is used to detect the humidity of the outdoor fresh air OA. At the return air inlet, a return air temperature sensor 2, a return air humidity sensor 6, and a coarse filter 105 are also installed in sequence. The return air temperature sensor 2 is used to detect the temperature of the indoor return air RA, the return air humidity sensor 6 is used to detect the humidity of the indoor return air RA, and the coarse filter 105 is used to filter the indoor return air RA.

[0045] The following example illustrates the humidification process of a fresh air system in winter.

[0046] When the fresh air system is running, the indoor return air RA enters the dehumidification zone of the adsorption rotor 101 through the return air inlet and coarse filter 105, and is then exhausted to the outside by the exhaust fan 104. During this process, the dehumidification zone of the adsorption rotor 101 adsorbs moisture from the indoor return air RA and slowly transfers the adsorbed moisture to the regeneration zone of the adsorption rotor 101. Meanwhile, the outdoor fresh air OA is filtered through the high-efficiency filter 106 and heated by the heat source 102 to become high-temperature air. This high-temperature air passes through the regeneration zone of the adsorption rotor 101, carrying away the moisture in the adsorption rotor 101, and is then delivered to the room by the supply fan 103, thus achieving waterless humidification of the indoor air. The air state changes of the fresh air and return air throughout the entire process are as follows: Figure 2 As shown.

[0047] The following description, with reference to the accompanying drawings, describes the method for determining the fresh air humidity, the storage medium, and the fresh air device according to embodiments of the present invention.

[0048] Figure 3 This is a schematic flowchart illustrating a method for determining the humidity of fresh air in a fresh air device according to an embodiment of the present invention. (Reference) Figure 3 As shown, the method for determining the humidity of fresh air in this fresh air system includes the following steps:

[0049] S101 acquires the temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air.

[0050] It should be noted that, in this embodiment of the invention, outdoor fresh air that has passed through a heat source is defined as regenerated air. (See reference...) Figure 1 As shown, the temperature of the regenerated air can be obtained in real time by the regenerated temperature sensor 5 installed at the heat source 102, the temperature of the indoor return air can be obtained in real time by the return air temperature sensor 2 installed at the return air vent, the humidity of the indoor return air can be obtained in real time by the return air humidity sensor 6, and the temperature of the outdoor exhaust air can be obtained in real time by the exhaust air temperature sensor 3 installed at the exhaust vent.

[0051] For ease of description and subsequent calculations, the temperature of the regenerated air detected by the regeneration temperature sensor 5 will be denoted as T. Reg,te The indoor return air temperature detected by return air temperature sensor 2 is denoted as T. RA，te The humidity of the indoor return air detected by the return air humidity sensor 6 is recorded as RH. RA,te The outdoor exhaust temperature detected by exhaust temperature sensor 3 is recorded as T. EA,te .

[0052] S102, determine the moisture content of outdoor fresh air based on the temperature of regenerated air, the temperature of indoor return air, the relative humidity of indoor return air, and the temperature of outdoor exhaust air.

[0053] At the temperature T of the regenerated air Reg,te Indoor return air temperature T RA,te The relative humidity (RH) of indoor return air RA,te The temperature of outdoor exhaust air T EA,te Then, based on the temperature T of the regenerated air... Reg,te Indoor return air temperature T RA,te The relative humidity (RH) of indoor return air RA,te The temperature of outdoor exhaust air T EA,te To further determine the humidity content of the outdoor fresh air.

[0054] In some embodiments, determining the moisture content of outdoor fresh air based on the temperature of regenerated air, the temperature of indoor return air, the relative humidity of indoor return air, and the temperature of outdoor exhaust air may include: calculating the enthalpy of indoor return air based on the temperature and relative humidity of indoor return air; obtaining an estimated relative humidity of regenerated air, and calculating the enthalpy of outdoor exhaust air based on the estimated relative humidity of regenerated air, the temperature of regenerated air, the relative humidity of indoor return air, and the temperature of outdoor exhaust air; determining the enthalpy of regenerated air based on the temperature of regenerated air, the enthalpy of indoor return air, and the enthalpy of outdoor exhaust air; and determining the moisture content of outdoor fresh air based on the enthalpy of regenerated air, the temperature of regenerated air, and the estimated relative humidity of regenerated air.

[0055] Specifically, firstly, it can be determined based on the indoor return air temperature T. RA,te Relative humidity (RH) of indoor return air RA,te Calculate the enthalpy h of indoor return air RA,ca Specifically, the enthalpy value h of the indoor return air can be obtained by consulting the enthalpy-humidity chart. RA,ca Then obtain the estimated relative humidity (RH) of the regenerated air. Reg,0 The estimated relative humidity (RH) of the regenerated air Reg,0 The initial value can be a fixed value, which can be determined by researchers based on experience or through multiple experiments. Understandably, in subsequent steps, the relative humidity (RH) of the regenerated air can be estimated. Reg,0 Update accordingly. Obtain the enthalpy value h of the indoor return air. RA,ca Estimated relative humidity (RH) of regenerated air Reg,0 Then, further analysis can be performed based on the enthalpy h of the indoor return air. RA,ca Estimated relative humidity (RH) of regenerated air Reg,0 The relative humidity (RH) of indoor return air RA,te The temperature of outdoor exhaust air T EA,te Calculate the enthalpy h of outdoor exhaust air EA,ca Furthermore, the temperature T of the regenerated air can be used as a reference. Reg,te Enthalpy h of indoor return air RA,ca Enthalpy h of outdoor exhaust EA,ca Determine the enthalpy h of the regenerated air Reg,ca Then, based on the enthalpy h of the regenerated air... Reg,ca The temperature T of the regenerated air Reg,te Estimated relative humidity (RH) of regenerated air Reg,0 Determine the moisture content d of the outdoor fresh air OA,ca .

[0056] In some embodiments, calculating the enthalpy of the outdoor exhaust air based on the estimated relative humidity of the regenerated air, the temperature of the regenerated air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air includes: determining the dehumidification efficiency of the fresh air unit based on the temperature of the regenerated air; calculating the relative humidity of the outdoor exhaust air based on the dehumidification efficiency, the estimated relative humidity of the regenerated air, and the relative humidity of the indoor return air; and calculating the enthalpy of the outdoor exhaust air based on the relative humidity of the outdoor exhaust air and the temperature of the outdoor exhaust air.

[0057] Specifically, firstly, it can be determined based on the temperature T of the regenerated air. Reg,te To calculate the dehumidification efficiency ε(T) of the fresh air unit Reg,te The calculation formula is shown in formula (1):

[0058]

[0059] Among them, T max The maximum regeneration temperature of the adsorption rotor can be in the range of (100, 400); T RA The temperature of the return air is denoted as ; m is a preset coefficient, which can range from (0, 30).

[0060] Next, we can determine the dehumidification efficiency ε(T) Reg,te ), Estimated relative humidity (RH) of regenerated air Reg,0 Relative humidity (RH) of indoor return air RA,te To calculate the relative humidity (RH) of outdoor exhaust air. EA,ca The calculation formula is shown in formula (2):

[0061]

[0062] Among them, T Reg,te This indicates the temperature of the regenerated air, expressed in degrees Celsius (°C).

[0063] ε represents the dehumidification efficiency of the adsorption rotor, expressed in percentages (%).

[0064] RH RA，te This indicates the relative humidity of the indoor return air.

[0065] RH EA，ca This indicates the relative humidity of the outdoor exhaust air.

[0066] RH Reg，0 This indicates the relative humidity of the regenerated air.

[0067] The dehumidification efficiency ε(T) of the fresh air device is obtained through formulas (1) and (2). Reg,te The relative humidity (RH) of outdoor exhaust air EA,ca Then, based on the relative humidity (RH) of the outdoor exhaust air... EA,caThe temperature of outdoor exhaust air T EA,te Calculate the enthalpy h of outdoor exhaust air EA,ca Specifically, the enthalpy value h of the outdoor exhaust air can be calculated by consulting the enthalpy-humidity chart. EA,ca .

[0068] At the temperature T of the regenerated air Reg,te Enthalpy h of indoor return air RA,ca Enthalpy h of outdoor exhaust EA,ca Then, based on the temperature T of the regenerated air... Reg,te Enthalpy h of indoor return air RA,ca Enthalpy h of outdoor exhaust EA,ca To calculate the enthalpy of the regenerated air.

[0069] In some embodiments, determining the enthalpy of the regenerated air based on the temperature of the regenerated air, the enthalpy of the indoor return air, and the enthalpy of the outdoor exhaust air includes: determining the heat loss on the dehumidification side of the fresh air unit based on the temperature of the regenerated air; and calculating the enthalpy of the regenerated air based on the heat loss on the dehumidification side, the enthalpy of the indoor return air, and the enthalpy of the outdoor exhaust air.

[0070] Specifically, firstly, it can be determined based on the temperature T of the regenerated air. Reg,te To calculate the heat loss on the dehumidification side of the fresh air unit Its calculation formula is shown in formula (3):

[0071]

[0072] Wherein, φ(T) 100 ) represents the heat loss value of the dehumidification side of the adsorption rotor at a regeneration temperature of 100℃, which can be obtained through experimental testing; k is a preset coefficient, and its value range can be (0, 0.001).

[0073] The heat loss on the dehumidification side of the fresh air unit was calculated. Then, further analysis can be conducted based on the heat loss on the dehumidification side of the fresh air unit. enthalpy h of indoor return air RA,ca Enthalpy h of outdoor exhaust EA,ca Calculate the enthalpy h of the regenerated air Reg,ca The calculation formula is shown in formula (4):

[0074]

[0075] Among them, T Reg,te This indicates the temperature of the regenerated air, expressed in degrees Celsius (°C).

[0076] ε represents the dehumidification efficiency of the adsorption rotor, expressed in percentages (%).

[0077] h RA ,ca This indicates the enthalpy of indoor return air, expressed in kilojoules per kilogram of dry air [kJ / kg(dry)].

[0078] h EA , ca This indicates the enthalpy value of outdoor exhaust air, expressed in kilojoules per kilogram of dry air [kJ / kg(dry)].

[0079] h Reg , ca This indicates the enthalpy of regenerated air, expressed in kilojoules per kilogram of dry air [kJ / kg(dry)].

[0080] After obtaining the enthalpy h of the regenerated air Reg,ca Then, based on the enthalpy h of the regenerated air... Reg,ca The temperature T of the regenerated air Reg,te Estimated relative humidity (RH) of regenerated air Reg,0 Determine the moisture content d of the outdoor fresh air OA,ca .

[0081] In some embodiments, determining the moisture content of outdoor fresh air based on the enthalpy of regenerated air, the temperature of regenerated air, and an estimated relative humidity of regenerated air includes: calculating a calculated relative humidity value of regenerated air based on the enthalpy of regenerated air and the temperature of regenerated air; updating the estimated relative humidity value of regenerated air based on the calculated relative humidity value of regenerated air when the absolute value of the difference between the calculated relative humidity value of regenerated air and the estimated relative humidity value of regenerated air is greater than a second threshold, and recalculating the relative humidity of outdoor exhaust air based on the updated estimated relative humidity value of regenerated air; and calculating the moisture content of outdoor fresh air based on the temperature of regenerated air and the calculated relative humidity value of regenerated air when the absolute value of the difference between the calculated relative humidity value of regenerated air and the estimated relative humidity value of regenerated air is less than or equal to the second threshold.

[0082] Specifically, we can first determine the enthalpy h of the regenerated air. Reg,ca and the temperature T of the regenerated air Reg,te The calculated relative humidity (RH) of the regenerated air is obtained. Reg,ca According to the enthalpy value h of regenerated air Reg,ca and the temperature T of the regenerated air Reg,te The calculated relative humidity (RH) of the regenerated air is obtained. Reg,ca One method is to consult an enthalpy-humidity chart to determine the enthalpy value h of the regenerated air. Reg,ca and the temperature T of the regenerated air Reg,te Obtain the calculated relative humidity (RH) of the regenerated air. Reg,ca The calculated relative humidity (RH) of the regenerated air was obtained. Reg,ca Next, the relative humidity (RH) of the regenerated air is calculated. Reg,caEstimated relative humidity (RH) of regenerated air Reg,0 If the absolute value of the difference between the two values ​​is greater than the second threshold, it indicates that the calculated relative humidity (RH) of the regenerated air is... Reg,ca If the relative humidity of the regenerated air deviates significantly from the actual relative humidity, the calculated relative humidity (RH) of the regenerated air shall be used. Reg,ca The initial relative humidity estimate (RH) of the regenerated air. Reg,0 Update the data and estimate the relative humidity (RH) of the regenerated air based on the updated values. Reg,0 Recalculate the relative humidity (RH) of the outdoor exhaust air. EA,ca If the absolute value of the difference between the two is less than or equal to the second threshold, it indicates that the calculated relative humidity (RH) of the regenerated air is... Reg,ca Since the relative humidity of the regenerated air matches the actual humidity, the next step is to determine the temperature T of the regenerated air. Reg,te Calculated relative humidity (RH) of regenerated air Reg,ca To calculate the moisture content d of the outdoor fresh air OA,ca As an example, the moisture content d of outdoor fresh air can be calculated by querying an enthalpy-humidity chart. OA,ca .

[0083] It should be noted that since the outdoor fresh air (OA) is heated to approximately 105°C by the heat source, the humidity content remains unchanged; therefore, the humidity content of the outdoor fresh air (OA) is equal to the humidity content of the regenerated air. Furthermore, the second threshold can be set according to actual conditions; optionally, this second threshold is 1%.

[0084] S103, acquires the temperature and relative humidity measurements of outdoor fresh air.

[0085] Specifically, refer to Figure 1 As shown, the outdoor fresh air temperature sensor 4 and fresh air humidity sensor 7, respectively installed at the outdoor fresh air inlet, can obtain the outdoor fresh air temperature measurement value T by real-time detection of the fresh air temperature and fresh air humidity. OA,te The relative humidity (RH) of the outdoor fresh air OA,te .

[0086] S104, calculate the relative humidity of the outdoor fresh air based on the moisture content and temperature of the outdoor fresh air, and determine the relative humidity of the outdoor fresh air based on the calculated relative humidity and the measured relative humidity of the outdoor fresh air.

[0087] Specifically, based on the humidity content d of the outdoor fresh air OA,ca Calculation of outdoor fresh air temperature and relative humidity (RH) OA,ca One method is to consult an enthalpy-humidity chart to determine the humidity content (d) of the outdoor fresh air. OA,ca Calculation of outdoor fresh air temperature and relative humidity (RH)OA,ca The calculated relative humidity (RH) of the outdoor fresh air is then used. OA,ca The readings are used as a backup for the virtual humidity sensor.

[0088] The relative humidity (RH) of the outdoor fresh air is obtained. OA,te Next, considering the possibility of damage or malfunction of the fresh air humidity sensor located at the fresh air inlet, it is necessary to first determine whether the sensor can detect the relative humidity measurement of the outdoor fresh air. If it can detect the relative humidity measurement of the outdoor fresh air, it indicates that the fresh air humidity sensor is not damaged or malfunctioning, and therefore the RH value can be calculated based on the relative humidity of the outdoor fresh air. OA,ca The relative humidity (RH) of the outdoor fresh air OA,te To determine the relative humidity of outdoor fresh air. In some embodiments, determining the relative humidity of outdoor fresh air based on a calculated value and a measured value includes: when the absolute value of the difference between the calculated value and the measured value is less than or equal to a first threshold, determining the relative humidity of outdoor fresh air based on the measured value; when the absolute value of the difference between the calculated value and the measured value is greater than the first threshold, sending a second prompt message and determining the relative humidity of outdoor fresh air based on the calculated value.

[0089] Specifically, considering the possibility of drift in the fresh air humidity sensor installed at the fresh air inlet, which could lead to inaccurate measurements of the relative humidity of the outdoor fresh air, the relative humidity (RH) of the outdoor fresh air can be calculated. OA,ca The relative humidity (RH) of the outdoor fresh air OA,te Calculate the absolute value of the difference between the two values. If the absolute value of the difference is less than or equal to the first threshold, it indicates that the fresh air humidity sensor installed at the fresh air inlet has not drifted, meaning the outdoor fresh air relative humidity measurement value RH is within acceptable limits. OA,te Yes, it's accurate. At this point, the relative humidity (RH) of the outdoor fresh air can be measured. OA,te The relative humidity of the actual outdoor fresh air is used as the reference value. If the absolute value of the difference between the two values ​​is greater than the first threshold, it indicates that the fresh air humidity sensor installed at the fresh air inlet has drifted, meaning that the measured relative humidity (RH) of the outdoor fresh air is incorrect. OA,te This is inaccurate. At this point, the fresh air system can issue a second warning message, alerting the user that the fresh air humidity sensor is drifting, and will update the calculated relative humidity (RH) value of the outdoor fresh air. OA,ca The relative humidity is used as the actual outdoor fresh air.

[0090] In some embodiments, when the relative humidity of the outdoor fresh air is not measured, a first prompt message is sent, and the relative humidity of the outdoor fresh air is determined based on the calculated relative humidity of the outdoor fresh air.

[0091] Specifically, if no relative humidity measurement of the outdoor fresh air is obtained, it indicates that the fresh air humidity sensor installed at the fresh air inlet is damaged or malfunctioning. At this time, the fresh air system can issue an initial warning to the user, indicating that the fresh air humidity sensor is damaged or malfunctioning, and will then calculate the relative humidity (RH) of the outdoor fresh air. OA,ca The relative humidity is used as the actual outdoor fresh air.

[0092] The fresh air device can issue the first and second prompt messages in the following ways: by issuing the first prompt message via voice broadcast or by issuing the first prompt message via text display on the screen.

[0093] In some embodiments, the relative humidity of the outdoor fresh air is determined at preset intervals.

[0094] Specifically, in order to ensure the continuous and normal operation of the fresh air device during use, the relative humidity of the outdoor fresh air can be determined at preset intervals. The preset interval can be determined according to the actual situation, for example, every 5 seconds.

[0095] In one specific embodiment of the present invention, such as Figure 4As shown, firstly, the temperature and relative humidity of the indoor return air are measured. Then, the enthalpy of the indoor return air is obtained based on these measurements. Next, the temperature of the regenerated air is measured to calculate the dehumidification efficiency and dehumidification-side loss of the adsorption rotor. Then, the relative humidity of the outdoor exhaust air is calculated based on the dehumidification efficiency, the relative humidity of the indoor return air, and the estimated relative humidity of the regenerated air. Next, the enthalpy of the outdoor exhaust air is calculated based on its relative humidity and temperature. Then, the enthalpy of the regenerated air is calculated based on the dehumidification-side loss, the enthalpy of the outdoor exhaust air, and the enthalpy of the indoor return air. Finally, the relative humidity of the regenerated air is calculated based on its temperature and enthalpy. The relative humidity of the regenerated air is compared with its estimated relative humidity. If the deviation is greater than or equal to 1%, the estimated relative humidity of the regenerated air is updated based on the actual relative humidity. The relative humidity of the regenerated air is then recalculated until the deviation is less than 1%. When the deviation between the relative humidity of the regenerated air and the estimated relative humidity of the regenerated air is less than 1%, the moisture content of the outdoor fresh air is calculated based on the measured temperature and relative humidity of the regenerated air. Then, the temperature of the outdoor fresh air is measured, and the calculated relative humidity of the outdoor fresh air is calculated based on the temperature and moisture content of the outdoor fresh air. After calculating the relative humidity of the outdoor fresh air, it is further determined whether the measured relative humidity of the outdoor fresh air is detected. If not detected, the calculated relative humidity of the outdoor fresh air is used, and a message indicating that the humidity sensor of the outdoor fresh air is damaged or malfunctioning is displayed on the screen. If the measured relative humidity of the outdoor fresh air is detected, the deviation between the measured relative humidity of the outdoor fresh air and the calculated relative humidity of the outdoor fresh air is further determined. If the deviation is greater than 5%, the control system uses the calculated relative humidity of the outdoor fresh air and displays a message indicating that the humidity sensor of the outdoor fresh air has drifted on the screen. If the deviation is less than 5%, the control system uses the measured relative humidity of the outdoor fresh air.

[0096] In summary, the fresh air humidity determination method for a fresh air device according to embodiments of the present invention acquires the temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air. Then, based on the acquired temperature and humidity parameters, the moisture content of the outdoor fresh air is determined. Next, the temperature of the outdoor fresh air is acquired, and a calculated value of the relative humidity of the outdoor fresh air is calculated based on the temperature and moisture content. Finally, a measured value of the relative humidity of the outdoor fresh air is acquired and compared with the calculated value to determine the accurate relative humidity of the outdoor fresh air. Therefore, the fresh air humidity determination method for a fresh air device according to embodiments of the present invention can accurately determine the relative humidity of the outdoor fresh air, thereby ensuring the normal operation of the fresh air device and improving the user experience.

[0097] In conjunction with the above embodiments, the present invention also proposes a computer-readable storage medium storing a fresh air humidity determination program for a fresh air device, which, when executed by a processor, implements the fresh air humidity determination method for the fresh air device according to the above embodiments.

[0098] The computer-readable storage medium of this invention executes a fresh air humidity determination program stored thereon on the fresh air device through a processor, which can accurately determine the relative humidity of the outdoor fresh air, thereby ensuring that the fresh air device can operate normally and improving the user experience.

[0099] Regarding the above embodiments, embodiments of the present invention also propose a first type of fresh air device, see reference. Figure 5 As shown, the fresh air device 400 includes a memory 402, a processor 404, and a fresh air humidity determination program 406 stored in the memory 402 and run on the processor 404. When the processor 404 executes the fresh air humidity determination program 406, it implements the fresh air humidity determination method of the fresh air device according to the above embodiment.

[0100] The fresh air device in this embodiment of the invention includes a memory and a processor. By executing the fresh air humidity determination program stored in the memory through the processor, the relative humidity of the outdoor fresh air can be accurately determined, thereby ensuring that the fresh air device can operate normally and improving the user experience.

[0101] Corresponding to the fresh air humidity determination method of the fresh air device in the above embodiments, the present invention also proposes a second type of fresh air device.

[0102] Figure 6 This is a schematic diagram of the structure of a second type of fresh air device according to an embodiment of the present invention. (Reference) Figure 6 As shown, the second type of fresh air device 500 includes: an adsorption rotor 101, a heat source 105, a supply air fan 103, an exhaust air fan 102, and a control component 501.

[0103] The system includes a supply air fan 103 located at the indoor air supply outlet to deliver fresh outdoor air into the room, an exhaust air fan 102 located at the outdoor exhaust outlet to exhaust indoor return air to the outside, an adsorption rotor 101 to recover moisture from the indoor return air and release it back into the room with the fresh outdoor air, a heat source 105 located between the outdoor fresh air inlet and the adsorption rotor to heat the fresh outdoor air to form regenerated air, and a control component 501 to acquire the temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air; to determine the moisture content of the fresh outdoor air based on the temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air; to acquire the measured values ​​of the temperature and relative humidity of the fresh outdoor air; to calculate the calculated value of the relative humidity of the fresh outdoor air based on the moisture content and temperature of the fresh outdoor air; and to determine the relative humidity of the fresh outdoor air based on the calculated value and the measured value.

[0104] In some embodiments, the control component 501 is further configured to send a first prompt message when the relative humidity measurement value of the outdoor fresh air is not obtained, and to determine the relative humidity of the outdoor fresh air based on the calculated relative humidity value of the outdoor fresh air.

[0105] In some embodiments, the control component 501 is specifically configured to determine the relative humidity of the outdoor fresh air based on the measured relative humidity of the outdoor fresh air when the absolute value of the difference between the calculated relative humidity value and the measured relative humidity value of the outdoor fresh air is less than or equal to a first threshold; and to send a second prompt message and determine the relative humidity of the outdoor fresh air based on the calculated relative humidity value of the outdoor fresh air when the absolute value of the difference between the calculated relative humidity value and the measured relative humidity value of the outdoor fresh air is greater than the first threshold.

[0106] In some embodiments, the control component 501 is further configured to calculate the enthalpy of the indoor return air based on the temperature and relative humidity of the indoor return air; obtain an estimated relative humidity of the regenerated air, and calculate the enthalpy of the outdoor exhaust air based on the estimated relative humidity of the regenerated air, the temperature of the regenerated air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air; determine the enthalpy of the regenerated air based on the temperature of the regenerated air, the enthalpy of the indoor return air, and the enthalpy of the outdoor exhaust air; and determine the moisture content of the outdoor fresh air based on the enthalpy of the regenerated air, the temperature of the regenerated air, and the estimated relative humidity of the regenerated air.

[0107] In some embodiments, the control component 501 is further configured to determine the dehumidification efficiency of the fresh air unit based on the temperature of the regenerated air; calculate the relative humidity of the outdoor exhaust air based on the dehumidification efficiency, the estimated relative humidity of the regenerated air, and the relative humidity of the indoor return air; and calculate the enthalpy of the outdoor exhaust air based on the relative humidity of the outdoor exhaust air and the temperature of the outdoor exhaust air.

[0108] In some embodiments, the control component 501 is further configured to determine the dehumidification side heat loss of the fresh air unit based on the temperature of the regenerated air; and to calculate the enthalpy of the regenerated air based on the dehumidification side heat loss, the enthalpy of the indoor return air, and the enthalpy of the outdoor exhaust air.

[0109] In some embodiments, the control component 501 is further configured to calculate a relative humidity value of the regenerated air based on the enthalpy of the regenerated air and the temperature of the regenerated air; when the absolute value of the difference between the calculated relative humidity value of the regenerated air and the estimated relative humidity value of the regenerated air is greater than a second threshold, update the estimated relative humidity value of the regenerated air based on the calculated relative humidity value of the regenerated air, and recalculate the relative humidity of the outdoor exhaust air based on the updated estimated relative humidity value of the regenerated air; when the absolute value of the difference between the calculated relative humidity value of the regenerated air and the estimated relative humidity value of the regenerated air is less than or equal to the second threshold, calculate the moisture content of the outdoor fresh air based on the temperature of the regenerated air and the calculated relative humidity value of the regenerated air.

[0110] In some embodiments, the control component 501 is further configured to determine the relative humidity of the outdoor fresh air at preset intervals.

[0111] It should be noted that for details not disclosed in the fresh air system, please refer to the details disclosed in the fresh air humidity determination method for the fresh air system, which will not be repeated here.

[0112] In this embodiment of the invention, the control component of the fresh air device acquires the temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air. Then, based on the acquired temperature and humidity parameters, it determines the moisture content of the outdoor fresh air. Next, it acquires the temperature of the outdoor fresh air and calculates its relative humidity based on the temperature and moisture content. Finally, it acquires the measured relative humidity of the outdoor fresh air and compares it with the calculated relative humidity value to determine the accurate relative humidity of the outdoor fresh air. Therefore, the fresh air humidity determination device in this embodiment of the invention can accurately determine the relative humidity of the outdoor fresh air, thereby ensuring the normal operation of the fresh air device and improving the user experience.

[0113] It should be noted that the logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus, or device (such as a computer-based system, a processor-included system, or other system that can fetch and execute instructions from, an instruction execution system, apparatus, or device). For the purposes of this specification, "computer-readable medium" can be any means that can contain, store, communicate, propagate, or transmit programs for use by, or in conjunction with, an instruction execution system, apparatus, or device. More specific examples (a non-exhaustive list) of computer-readable media include: an electrical connection having one or more wires (electronic device), a portable computer disk drive (magnetic device), random access memory (RAM), read-only memory (ROM), erasable and editable read-only memory (EPROM or flash memory), fiber optic devices, and portable optical disc read-only memory (CDROM). In addition, computer-readable media can even be paper or other suitable media on which programs can be printed, because programs can be obtained electronically, for example, by optically scanning paper or other media, followed by editing, interpreting or otherwise processing as necessary, and then stored in computer memory.

[0114] It should be understood that various parts of the present invention can be implemented in hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented in software or firmware stored in memory and executed by a suitable instruction execution system. For example, if implemented in hardware, as in another embodiment, it can be implemented using any one or a combination of the following techniques known in the art: discrete logic circuits having logic gates for implementing logical functions on data signals, application-specific integrated circuits (ASICs) having suitable combinational logic gates, programmable gate arrays (PGAs), field-programmable gate arrays (FPGAs), etc.

[0115] In the description of this specification, references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions 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 one or more embodiments or examples.

[0116] Furthermore, the terms "first," "second," etc., used in the embodiments of this invention are for descriptive purposes only and should not be construed as indicating or implying relative importance, or implicitly specifying the number of technical features indicated in this embodiment. Therefore, features defined with terms such as "first" and "second" in the embodiments of this invention can explicitly or implicitly indicate that the embodiment includes at least one of those features. In the description of this invention, the word "multiple" means at least two or more, such as two, three, four, etc., unless otherwise explicitly specified in the embodiments.

[0117] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A method for determining the humidity of fresh air in a fresh air system, characterized in that, The fresh air device includes an adsorption rotor, a heat source, a supply-side fan, and an exhaust-side fan. The supply-side fan is located at the indoor air supply vent and is used to deliver outdoor fresh air into the room. The exhaust-side fan is located at the outdoor exhaust vent and is used to exhaust indoor return air to the outside. The adsorption rotor is used to recover moisture from the indoor return air and release the moisture back into the room along with the outdoor fresh air. The heat source is located between the outdoor fresh air vent and the adsorption rotor and is used to heat the outdoor fresh air to form regenerated air. The method includes: The temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air are obtained. The moisture content of the outdoor fresh air is determined based on the temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air. Obtain the temperature and relative humidity measurements of the outdoor fresh air; The relative humidity of the outdoor fresh air is calculated based on the moisture content and temperature of the outdoor fresh air, and the relative humidity of the outdoor fresh air is determined based on the calculated relative humidity and the measured relative humidity.

2. The method according to claim 1, characterized in that, The method further includes: If the relative humidity of the outdoor fresh air is not measured, a first prompt message is sent, and the relative humidity of the outdoor fresh air is determined based on the calculated relative humidity value of the outdoor fresh air.

3. The method according to claim 1, characterized in that, The relative humidity of the outdoor fresh air is determined based on the calculated relative humidity value and the measured relative humidity value of the outdoor fresh air, including: When the absolute value of the difference between the calculated relative humidity value of the outdoor fresh air and the measured relative humidity value of the outdoor fresh air is less than or equal to a first threshold, the relative humidity of the outdoor fresh air is determined based on the measured relative humidity value of the outdoor fresh air. When the absolute value of the difference between the calculated relative humidity of the outdoor fresh air and the measured relative humidity of the outdoor fresh air is greater than a first threshold, a second prompt message is sent, and the relative humidity of the outdoor fresh air is determined based on the calculated relative humidity of the outdoor fresh air.

4. The method according to claim 1, characterized in that, The moisture content of the outdoor fresh air is determined based on the temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air, including: The enthalpy of the indoor return air is calculated based on the temperature and relative humidity of the indoor return air. Obtain the relative humidity estimate of the regenerated air, and calculate the enthalpy of the outdoor exhaust air based on the relative humidity estimate of the regenerated air, the temperature of the regenerated air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air. The enthalpy of the regenerated air is determined based on the temperature of the regenerated air, the enthalpy of the indoor return air, and the enthalpy of the outdoor exhaust air. The moisture content of the outdoor fresh air is determined based on the enthalpy of the regenerated air, the temperature of the regenerated air, and the estimated relative humidity of the regenerated air.

5. The method according to claim 4, characterized in that, The enthalpy of the outdoor exhaust air is calculated based on the estimated relative humidity of the regenerated air, the temperature of the regenerated air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air, including: The dehumidification efficiency of the fresh air device is determined based on the temperature of the regenerated air. The relative humidity of the outdoor exhaust air is calculated based on the dehumidification efficiency, the estimated relative humidity of the regenerated air, and the relative humidity of the indoor return air. The enthalpy of the outdoor exhaust air is calculated based on the relative humidity and temperature of the outdoor exhaust air.

6. The method according to claim 5, characterized in that, The enthalpy of the regenerated air is determined based on the temperature of the regenerated air, the enthalpy of the indoor return air, and the enthalpy of the outdoor exhaust air, including: The heat loss on the dehumidification side of the fresh air unit is determined based on the temperature of the regenerated air. The enthalpy of the regenerated air is calculated based on the heat loss on the dehumidification side, the enthalpy of the indoor return air, and the enthalpy of the outdoor exhaust air.

7. The method according to claim 6, characterized in that, The moisture content of the outdoor fresh air is determined based on the enthalpy of the regenerated air, the temperature of the regenerated air, and the estimated relative humidity of the regenerated air, including: The relative humidity of the regenerated air is calculated based on the enthalpy and temperature of the regenerated air. When the absolute value of the difference between the calculated relative humidity of the regenerated air and the estimated relative humidity of the regenerated air is greater than the second threshold, the estimated relative humidity of the regenerated air is updated based on the calculated relative humidity of the regenerated air, and the relative humidity of the outdoor exhaust air is recalculated based on the updated estimated relative humidity of the regenerated air. When the absolute value of the difference between the calculated relative humidity of the regenerated air and the estimated relative humidity of the regenerated air is less than or equal to a second threshold, the moisture content of the outdoor fresh air is calculated based on the temperature of the regenerated air and the calculated relative humidity of the regenerated air.

8. The method according to any one of claims 1-7, characterized in that, The method further includes: The relative humidity of the outdoor fresh air is determined at preset intervals.

9. A computer-readable storage medium, characterized in that, It stores a fresh air humidity determination program for a fresh air device, which, when executed by a processor, implements the fresh air humidity determination method for a fresh air device according to any one of claims 1-8.

10. A fresh air device, characterized in that, The device includes a memory, a processor, and a fresh air humidity determination program stored in the memory and executable on the processor. When the processor executes the fresh air humidity determination program, it implements the fresh air humidity determination method of the fresh air device according to any one of claims 1-8.

11. A fresh air device, characterized in that, The fresh air system includes an adsorption rotor, a heat source, a supply-side fan, an exhaust-side fan, and a control component. The supply-side fan is located at the indoor air inlet to deliver fresh outdoor air into the room. The exhaust-side fan is located at the outdoor exhaust inlet to exhaust indoor return air to the outside. The adsorption rotor is used to recover moisture from the indoor return air and release the moisture back into the room along with the fresh outdoor air. The heat source is located between the outdoor fresh air inlet and the adsorption rotor to heat the fresh outdoor air to form regenerated air. The control component is used for: The temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air are obtained; the moisture content of the outdoor fresh air is determined based on the temperature of the regenerated air, the temperature of the indoor return air, the relative humidity of the indoor return air, and the temperature of the outdoor exhaust air. The temperature and relative humidity of the outdoor fresh air are measured; the relative humidity of the outdoor fresh air is calculated based on the moisture content and temperature of the outdoor fresh air; and the relative humidity of the outdoor fresh air is determined based on the calculated relative humidity and the measured relative humidity.

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