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

Abstract

This invention discloses a control method, storage medium, and fresh air device for a fresh air system. The fresh air device includes an adsorption impeller, a heat source, a supply-side fan, an exhaust-side fan, and a bypass duct. The heat source heats the outdoor fresh air, and the adsorption impeller recovers moisture from the indoor return air passing through the exhaust-side fan, allowing the moisture to be released into the room along with the outdoor fresh air through the supply-side fan. The bypass duct is located between the outdoor fresh air inlet and the indoor supply air inlet, guiding unheated outdoor fresh air into the room through the indoor supply air inlet. The control method includes: when it is determined that the adsorption impeller is clogged and the current operating mode of the fresh air device is humidification mode, reducing the opening of the bypass duct valve and / or increasing the heating power of the heat source to prevent the humidification performance of the fresh air device from deteriorating. This ensures the humidification performance of the fresh air device, improving the user experience and the product's competitiveness.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to a control method, storage medium, and fresh air device for a fresh air system. Background Technology

[0002] To improve indoor air quality, people generally install fresh air systems indoors, which exchange outdoor air with indoor air to improve air quality.

[0003] However, during the use of fresh air systems, clogged filters and other debris often severely reduce the system's ability to process indoor air, thus affecting user comfort. The common solution is to temporarily stop the system and clean the filters, but this requires stopping the system altogether, which degrades the user experience and doesn't effectively address the immediate problem. Summary of the Invention

[0004] This invention aims to at least partially solve one of the technical problems in related technologies. Therefore, one objective of this invention is to provide a control method for a fresh air system that can maintain the humidification performance of the system even when it becomes clogged, thereby improving the user experience and the product's competitiveness.

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

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

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

[0008] To achieve the above objectives, in the fresh air transfer control method of the first aspect of the present invention, the fresh air device includes an adsorption rotor, a heat source, a supply air fan, an exhaust air fan, and a bypass duct. The heat source is used to heat the outdoor fresh air, and the adsorption rotor is used to recover the moisture in the indoor return air that has passed through the exhaust air fan, so that the moisture is released into the room along with the outdoor fresh air through the supply air fan. The bypass duct is disposed between the outdoor fresh air inlet and the indoor supply air inlet, and is used to guide the outdoor fresh air that has not been heated by the heat source into the room through the indoor supply air inlet. The control method includes: when it is determined that the adsorption rotor is clogged and the current operating mode of the fresh air device is humidification mode, reducing the opening of the bypass duct valve disposed on the bypass duct and / or increasing the heating power of the heat source to prevent the humidification performance of the fresh air device from deteriorating.

[0009] In this embodiment, when the fresh air device is operating in humidification mode, if the adsorption rotor becomes clogged, the opening of the bypass ventilation valve located on the bypass ventilation duct is reduced. This reduces the amount of unheated outdoor fresh air being directed into the room through the indoor air supply vent, thus increasing the amount of outdoor fresh air passing through the heat source to improve humidification performance. It also increases the temperature of the outdoor fresh air passing through the adsorption rotor, further enhancing humidification performance and preventing a decline in the humidification performance of the fresh air device. Therefore, the control method of the fresh air device in this embodiment can ensure the humidification performance of the fresh air device even when it becomes clogged, thereby improving the user experience and the product's competitiveness.

[0010] In some embodiments of the present invention, determining that the adsorption rotor is clogged includes: controlling the supply air fan and the exhaust air fan to operate in a constant air volume mode; when it is determined that the fresh air device meets a first preset condition, obtaining the actual rotation speed of the supply air fan and / or the exhaust air fan under the current operating mode and gear information; determining the rated rotation speed of the supply air fan and / or the exhaust air fan according to the current operating mode and the gear information; and determining that the adsorption rotor is clogged when the ratio of the actual rotation speed to the rated rotation speed is greater than a first preset ratio.

[0011] In some embodiments of the present invention, determining that the fresh air device meets a first preset condition includes: acquiring the operating status of the fresh air device every first preset time interval, and determining that the fresh air device meets the first preset condition when the fresh air device has not adjusted the current operating mode and gear information for a continuous second preset time interval, wherein the first preset time interval is less than the second preset time interval.

[0012] In some embodiments of the present invention, the control method further includes: when the fresh air device does not continuously adjust the current operating mode and gear information for the second preset time, or when the ratio of the actual speed to the rated speed is less than or equal to the first preset ratio, re-acquiring the operating status of the fresh air device.

[0013] In some embodiments of the present invention, the control method further includes: when it is determined that the adsorption rotor is clogged, adjusting the rotation speed of the supply air fan and / or the exhaust air fan to the rated rotation speed.

[0014] In some embodiments of the present invention, reducing the opening degree of the bypass ventilation valve disposed on the bypass ventilation duct includes: calculating an opening degree correction value of the bypass ventilation valve based on the ratio of the actual rotational speed to the rated rotational speed; obtaining the current opening degree of the bypass ventilation valve; and controlling the opening degree of the bypass ventilation valve to reduce the opening degree correction value when the difference between the current opening degree of the bypass ventilation valve and the opening degree correction value is greater than or equal to zero.

[0015] In some embodiments of the present invention, the opening correction value is calculated according to the following formula: △θ=d*(n a-b / N a-b ) 2 +e(n a-b / N a-b )+f, where △θ is the opening correction value, n a-b The actual rotational speed (N) of the supply air fan and / or the exhaust air fan when the current operating mode is a and the gear information is b. a-b The rated speed of the supply air fan and / or the exhaust air fan when the current operating mode is a and the gear information is b, where d, e, and f are preset parameters.

[0016] In some embodiments of the present invention, increasing the heating power of the heat source includes: calculating a temperature correction value for the outdoor fresh air passing through the adsorption rotor based on the ratio of the actual rotation speed to the rated rotation speed; obtaining the current temperature of the outdoor fresh air passing through the adsorption rotor; and controlling the heating power of the heat source to increase the temperature correction value of the outdoor fresh air passing through the adsorption rotor when the sum of the current temperature and the temperature correction value is less than or equal to a preset temperature value.

[0017] In some embodiments of the present invention, the temperature correction value is calculated according to the following formula: ΔT=g*(n a-b / N a-b ), where △T is the temperature correction value, n a-b The actual rotational speed (N) of the supply air fan and / or the exhaust air fan when the current operating mode is a and the gear information is b. a-b The rated speed of the supply air fan and / or the exhaust air fan when the current operating mode is a and the gear information is b, and g is a correction coefficient.

[0018] To achieve the above objectives, a second aspect of the present invention provides a computer-readable storage medium storing a control program for a fresh air device, which, when executed by a processor, implements the control method for the fresh air device according to the above embodiments.

[0019] The computer-readable storage medium of this invention executes the control program of the fresh air device stored thereon through a processor, which can ensure the humidification performance of the fresh air device when it becomes clogged, thereby improving the user experience and the competitiveness of the product.

[0020] 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 control program for the fresh air device stored in the memory and executable on the processor. When the processor executes the control program for the fresh air device, it implements the control method for the fresh air device according to the above embodiments.

[0021] The fresh air device of this invention includes a memory and a processor. The processor executes the control program of the fresh air device stored in the memory, which can ensure the humidification performance of the fresh air device when it becomes clogged, thereby improving the user experience and the competitiveness of the product.

[0022] To achieve the above objectives, a fourth aspect of the present invention provides a second type of fresh air device, comprising an adsorption impeller, a heat source, a supply air fan, an exhaust air fan, a bypass duct, and a control component. The heat source is used to heat outdoor fresh air. The adsorption impeller is used to recover moisture from indoor return air passing through the exhaust air fan, so that the moisture is released into the room along with the outdoor fresh air through the supply air fan. The bypass duct is disposed between the outdoor fresh air inlet and the indoor supply air inlet, and is used to guide outdoor fresh air that has not been heated by the heat source into the room through the indoor supply air inlet. The control component is used to: reduce the opening of the bypass duct valve disposed on the bypass duct and / or increase the heating power of the heat source when it is determined that the adsorption impeller is clogged and the current operating mode of the fresh air device is humidification mode, so as to prevent the humidification performance of the fresh air device from deteriorating.

[0023] In this embodiment, when the fresh air device is operating in humidification mode, if the adsorption rotor becomes clogged, the control component reduces the opening of the bypass ventilation valve located on the bypass ventilation duct. This reduces the amount of unheated outdoor fresh air being directed into the room through the indoor air outlet, thus increasing the amount of outdoor fresh air passing through the heat source to improve humidification performance. The control component can also increase the temperature of the outdoor fresh air passing through the adsorption rotor, thereby improving humidification performance and preventing the humidification performance of the fresh air device from deteriorating. Therefore, the fresh air device in this embodiment can maintain its humidification performance even when clogged, improving user experience and product competitiveness.

[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 This is a flowchart of a control method for a fresh air device according to an embodiment of the present invention;

[0027] Figure 3 This is a flowchart of a control method for a fresh air device according to another embodiment of the present invention;

[0028] Figure 4 This is a flowchart of a control method for a fresh air device according to another embodiment of the present invention;

[0029] Figure 5 This is a flowchart of a control method for a fresh air device according to another embodiment of the present invention;

[0030] Figure 6 This is a schematic diagram of the structure of a fresh air device according to yet another embodiment of the present invention;

[0031] Figure 7 This is a flowchart of a control method for a fresh air device according to a specific embodiment of the present invention;

[0032] Figure 8 This is a structural block diagram of the first type of fresh air device according to an embodiment of the present invention;

[0033] Figure 9 This is a structural block diagram of the second type of fresh air device according to an embodiment of the present invention. Detailed Implementation

[0034] 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.

[0035] The control method, storage medium, and fresh air device of the present invention are described below with reference to the accompanying drawings.

[0036] See Figure 1 The fresh air system includes an adsorption rotor 1, a heat source 2, a supply air fan 3, an exhaust air fan 4, and a bypass duct. A bypass duct is equipped with a bypass valve 5. The heat source 2 is used to heat the outdoor fresh air (OA). The heat source 2 can be a far-infrared heater, a resistance heating element, a ceramic electric auxiliary heater, or a complete set of warm air equipment. This invention does not specifically limit the use of the heat source; users can choose according to the specific environment in which the fresh air system is used. The adsorption rotor is used to recover moisture from the indoor return air (RA) passing through the exhaust air fan, so that the moisture is released into the room along with the outdoor fresh air (OA) through the supply air fan. The bypass duct is located between the outdoor fresh air inlet and the indoor supply air inlet, and is used to guide the unheated outdoor fresh air into the room through the indoor supply air inlet.

[0037] It should be noted that the air supply side and air exhaust side mentioned in this invention refer to the indoor environment. Air supply refers to bringing outdoor air into the room, while air exhaust refers to expelling indoor air to the outside. Figure 1 The function of the supply air fan is to bring fresh outdoor air into the room, while the function of the exhaust air fan is to exhaust indoor air to the outside.

[0038] Specifically, in combination Figure 1 In this embodiment, the fresh air device operates in isenthalpic humidity control mode, i.e., when humidifying indoor air. The adsorption wheel 1 typically has a fixed rotational speed, corresponding to the isenthalpic humidity control mode. Therefore, the adsorption wheel 1 is controlled to rotate at this speed. The adsorption wheel 1 generally contains a moisture-absorbing substance, such as zeolite. After the indoor return air RA passes through the adsorption wheel 1, the adsorption wheel 1 absorbs the moisture. As the adsorption wheel 1 rotates, when the moisture-absorbing portion moves to the fresh air duct, the outdoor fresh air OA is carried back into the indoor air through the adsorption wheel 1, thus humidifying the indoor air. Furthermore, a bypass duct is provided before the outdoor fresh air inlet and the indoor air outlet. A bypass valve 5 is installed on the bypass duct. By adjusting the opening of the bypass valve 5, the airflow of the outdoor fresh air OA through the bypass duct and through the adsorption wheel 1 can be controlled, thereby adjusting the humidification performance of the indoor air.

[0039] Figure 2 This is a flowchart of a control method for a fresh air device according to an embodiment of the present invention.

[0040] like Figure 2 As shown, in this embodiment, the control method of the fresh air device includes the following steps: S10, when it is determined that the adsorption rotor is clogged and the current operating mode of the fresh air device is humidification mode, the opening degree of the bypass ventilation valve set on the bypass ventilation duct is reduced and / or the temperature of the outdoor fresh air passing through the adsorption rotor is increased to prevent the humidification performance of the fresh air device from deteriorating.

[0041] First, it should be noted that the control method of the fresh air device in this embodiment can be applied to the control system or control components of the fresh air device.

[0042] Specifically, this embodiment is limited to the fresh air device operating in humidification mode. If it is determined that the adsorption wheel is clogged, the humidification performance of the fresh air device can be ensured by adjusting the bypass ventilation valve, or by adjusting the temperature of the outdoor fresh air passing through the adsorption wheel.

[0043] More specifically, by reducing the airflow through the bypass valve, the airflow through the adsorption rotor can be increased. Therefore, when the adsorption rotor is clogged, the airflow to the adsorption rotor can be increased, ensuring that the moisture brought into the room by the outdoor fresh air from the adsorption rotor is the same as or even more than when the adsorption rotor is not clogged, thus moisturizing or humidifying the indoor air. Alternatively, the temperature of the outdoor fresh air passing through the adsorption rotor can be increased, thereby increasing the moisture brought back into the indoor air by the outdoor fresh air from the adsorption rotor, thus completing the moisturizing or humidifying of the indoor air. Of course, both of the above humidification methods can be executed simultaneously to complete the indoor moisturizing or humidification work more quickly.

[0044] There are many ways to determine if the adsorption rotor is clogged, and the conditions for determination vary depending on the airflow control mode. For example, when controlling the fan with a fixed power, if the detected airflow is less than the preset airflow, it can be determined that there may be a clog, causing the fan to blow less air than the preset airflow. In some embodiments of the present invention, such as... Figure 3 As shown, determining that the adsorption rotor is clogged includes the following steps:

[0045] S301 controls the supply air side fan and exhaust air side fan to operate in constant air volume mode.

[0046] Specifically, the constant airflow mode controls the fan to send a preset airflow to a space, such as a room. If the filter becomes clogged, causing the airflow entering the room to be less than the preset airflow, the fan speed is increased to increase the airflow produced, ensuring that the airflow entering the room remains equal to the preset airflow. In this embodiment, both the supply and exhaust fans are controlled to operate in constant airflow mode to accurately determine the degree of clogging of the adsorption impeller based on the subsequent speed.

[0047] S302, when it is determined that the fresh air device meets the first preset condition, the actual speed of the supply air fan and / or exhaust air fan under the current operating mode and gear information is obtained.

[0048] After controlling the supply air fan and exhaust air fan to operate in constant air volume mode, the current operating mode and speed information of the supply air fan and / or exhaust air fan can be obtained. Even with constant air volume control, the air volume is different under different operating modes and speed information. Therefore, for the accuracy of subsequent judgment, this embodiment also determines the current operating mode and speed information of the supply air fan and exhaust air fan, and obtains the actual speed of the supply air fan and exhaust air fan under the current operating mode and speed information.

[0049] Furthermore, before obtaining the actual rotational speed of the supply air fan and / or exhaust air fan, this embodiment also determines whether the fresh air device meets the first preset condition. Specifically, in some embodiments, the fresh air device is determined to meet the first preset condition by the following steps: obtaining the operating status of the fresh air device every first preset time period, and determining that the fresh air device meets the first preset condition when the fresh air device has not adjusted the current operating mode and gear information for a continuous second preset time period, wherein the first preset time period is less than the second preset time period.

[0050] Specifically, in this embodiment, the first preset time ranges from (0, 1h), and the second preset time ranges from (0, 240h), with the first preset time being less than the second preset time. This embodiment uses a first preset time of 0.5 hours and a second preset time of 1 hour as an example. The control system or control component in the fresh air system acquires the operating status of the fresh air system every 0.5 hours. If the operating status of the fresh air system is the same in two consecutive acquisitions, it can be determined that the fresh air system has not adjusted its current operating mode and speed information for one hour, and therefore, the fresh air system meets the first preset condition.

[0051] It should be noted that in this embodiment, the fresh air device is judged by time to determine whether the first preset condition is met. This ensures that once the fresh air device meets the first preset condition, the current operating state of the fresh air device is relatively stable and will not change easily, thereby ensuring the accuracy of subsequent acquisition of information such as speed and fan speed.

[0052] S303 determines the rated speed of the supply air fan and / or exhaust air fan based on the current operating mode and gear information.

[0053] Specifically, in the above steps, when obtaining the actual speed of the supply air side fan and / or exhaust air side fan, the current operating mode and gear information of the supply air side fan and / or exhaust air side fan have been determined. Based on the current operating mode and gear information, the corresponding rated speed of the supply air side fan and / or exhaust air side fan can be determined by looking up a table. Specifically, it can be determined by looking up the table based on the factory parameters of the supply air side fan and / or exhaust air side fan.

[0054] S304, when the ratio of the actual rotation speed to the rated rotation speed is greater than the first preset ratio, it is determined that the adsorption rotor is clogged.

[0055] Specifically, after determining the actual and rated speeds of the supply-side and / or exhaust-side fans, the two can be compared in various ways, such as simply by comparing their differences. This embodiment compares the actual speed to the rated speed with a first preset ratio to determine whether the adsorption rotor is clogged, and alerts the user when clog is detected. It should be noted that using the ratio of the actual speed to the rated speed allows for a more detailed determination of whether the adsorption rotor is clogged. Furthermore, the accuracy of the clog detection can be improved by setting the precision of the first preset ratio.

[0056] In some embodiments of the present invention, the control method further includes: when the fresh air device has not continuously adjusted the current operating mode and gear information for a second preset time, or when the ratio of the actual speed to the rated speed is less than or equal to the first preset ratio, re-acquiring the operating status of the fresh air device.

[0057] Specifically, in this embodiment, if the fresh air device changes its operating mode or gear information within the second preset time, it can be determined that the fresh air device does not meet the first preset condition. That is to say, the current operating mode or gear information of the fresh air device is unstable. If the speed of the supply air fan and / or exhaust air fan is obtained at this time, the obtained speed is also very easy to change. Therefore, the obtained speed and other information are not very reliable. Therefore, the operating status of the fresh air device can be obtained again to further determine whether the fresh air device has not adjusted its current operating mode and gear information for the second preset time.

[0058] When judging the ratio of the actual speed to the rated speed, if the ratio is less than or equal to a first preset ratio, it indicates that the fresh air system is not clogged, or that an error has occurred in obtaining the actual or rated speed. Therefore, the operating status of the fresh air system is re-acquired to re-acquire the actual and rated speeds. Optionally, if the ratio of the actual speed to the rated speed obtained for a preset number of times, such as 10 times, is less than the first preset ratio, an error in the current acquisition step can be indicated so that maintenance personnel can quickly find the problem. Optionally, the range of the first preset ratio in this invention can be [0.5, 2].

[0059] In some embodiments of the present invention, when it is determined that the adsorption rotor is clogged, the rotation speed of the supply air fan and / or the exhaust air fan is adjusted to the rated speed.

[0060] Specifically, in constant airflow control mode, when the adsorption impeller becomes clogged, the supply-side fan and / or exhaust-side fan typically increase their speed to maintain a constant airflow. However, increasing the speed can generate noise, potentially disturbing users. In this embodiment, upon confirming that the adsorption impeller is clogged, the supply-side fan and / or exhaust-side fan are adjusted to their rated speeds to prevent noise interference. It is understandable that adjusting the speed of the supply-side fan and / or exhaust-side fan to their rated speeds reduces the amount of fresh outdoor air entering the room. If the fresh air system is in humidification mode at this time, it will affect the indoor humidity.

[0061] In one embodiment of the present invention, such as Figure 4 As shown, reducing the opening degree of the bypass ventilation valve installed on the bypass ventilation duct includes:

[0062] S401, calculate the opening correction value of the bypass ventilation valve based on the ratio of the actual speed to the rated speed.

[0063] Specifically, in this embodiment, the ratio of the actual rotation speed to the rated rotation speed can not only be used to determine whether the fresh air device is clogged, but also to calculate the opening correction value of the bypass ventilation valve when it is determined that the fresh air device is clogged, and to control the opening of the bypass ventilation valve according to the temperature correction value, so as to ensure the stability of indoor air humidity and prevent the impact of clog on indoor air humidity.

[0064] Furthermore, in some embodiments, the opening correction value can be calculated according to the following formula: △θ=d*(n a-b / N a-b ) 2 +e(n a-b / N a-b )+f, where Δθ is the opening correction value, n a-b N represents the actual rotational speed of the supply air fan and / or exhaust air fan when the current operating mode is a and the gear information is b. a-b The rated speed of the supply air fan and / or exhaust air fan when the current operating mode is a and the gear information is b, where d, e, and f are preset parameters.

[0065] Specifically, where 'a' represents the current operating mode of the supply air side fan and / or exhaust air side fan, and 'b' represents the speed setting information of the supply air side fan and / or exhaust air side fan. Because of different operating modes and different speed settings, the rotational speeds of the supply air side fan and / or exhaust air side fan are different. Therefore, in this embodiment, n can be used... a-b This indicates the actual engine speed in operating mode a and gear b, while N... a-bThis indicates the rated speed in operating mode a and gear b. Optionally, in this embodiment, the operating mode may include natural ventilation mode (1), total heat recovery mode (2), and humidification mode (3), and the gear information may include gears 1 to 7, and thus n 3-1 This can represent the actual rotation speed at level 1 in humidification mode. In this embodiment, after determining the actual rotation speed and the corresponding rated rotation speed, the formula △θ=d*(n) can be used. a-b / N a-b ) 2 +e(n a-b / N a-b )+f calculates the opening correction value △θ of the bypass ventilation valve, where d, e and f are preset parameters that can be calibrated through experimental data or determined based on the factory data of the fresh air unit.

[0066] S402, obtain the current opening degree of the bypass ventilator.

[0067] Specifically, during the operation of the fresh air system, the bypass ventilation valve can open to a certain angle. Optionally, the opening angle of the bypass ventilation valve is in the range of [0, 180°], with 180 degrees being fully open and 0 degrees being fully closed. In this embodiment, the current opening degree of the bypass ventilation valve can be obtained through a sensor, specifically an airflow sensor. The opening degree information of the bypass ventilation valve is determined by the detected airflow. For example, the larger the opening degree of the bypass ventilation valve, the larger the airflow detected by the airflow sensor; the smaller the opening degree of the bypass ventilation valve, the smaller the airflow detected by the airflow sensor. There is a near-linear relationship between the two, and the opening degree of the bypass ventilation valve can be determined based on the airflow detected by the airflow sensor. It should be noted that the opening degree of the bypass ventilation valve can also be determined by other methods such as image processing. This invention does not specifically limit the method of obtaining the current opening degree of the bypass ventilation valve.

[0068] S403, when the difference between the current opening degree of the bypass ventilation valve and the opening degree correction value is greater than or equal to zero, control the opening degree of the bypass ventilation valve to reduce the opening degree correction value.

[0069] Specifically, the current opening degree of the bypass ventilation valve is denoted as θ. The opening correction value △θ represents the reduction in opening degree required to maintain indoor humidity. To prevent the current opening degree θ from being too small to further reduce the opening correction value △θ, this embodiment first determines the difference between the current opening degree θ and the opening correction value △θ. If the difference is greater than or equal to zero, it indicates that the bypass ventilation valve can still reduce the opening correction value △θ, thus controlling the opening degree of the bypass ventilation valve to reduce the opening correction value △θ. It can be understood that if the difference between the current opening degree θ and the opening correction value △θ is less than zero, it indicates that the current opening degree θ is already small and cannot be further reduced. In this case, other methods or a combination of other methods can be used to maintain indoor humidity.

[0070] In another embodiment of the invention, such as Figure 5 As shown, increasing the heating power of the heat source includes:

[0071] S501 calculates the temperature correction value of the outdoor fresh air passing through the adsorption rotor based on the ratio of the actual rotation speed to the rated rotation speed.

[0072] Specifically, in this embodiment, the ratio of the actual rotation speed to the rated rotation speed can not only be used to determine whether the fresh air device is clogged, but also to calculate the temperature correction value of the outdoor fresh air passing through the adsorption wheel when the fresh air device is clogged, and control the temperature of the outdoor fresh air passing through the adsorption wheel according to the temperature correction value, so as to ensure the stability of indoor air humidity and prevent the impact of clog on indoor air humidity.

[0073] Furthermore, in some embodiments, the temperature correction value can be calculated according to the following formula: ΔT=g*(n a-b / N a-b ), where ΔT is the temperature correction value, n a-b N represents the actual rotational speed of the supply air fan and / or exhaust air fan when the current operating mode is a and the gear information is b. a-b The rated speed of the supply air fan and / or exhaust air fan when the current operating mode is a and the gear information is b, and g is the correction factor.

[0074] Specifically, where 'a' represents the current operating mode of the supply air side fan and / or exhaust air side fan, and 'b' represents the speed setting information of the supply air side fan and / or exhaust air side fan. Because of different operating modes and different speed settings, the rotational speeds of the supply air side fan and / or exhaust air side fan are different. Therefore, in this embodiment, n can be used... a-b This indicates the actual engine speed in operating mode a and gear b, while N... a-bThis indicates the rated speed in operating mode a and gear b. Optionally, in this embodiment, the operating mode may include natural ventilation mode (1), total heat recovery mode (2), and humidification mode (3), and the gear information may include gears 1 to 7, and thus n 3-1 This can represent the actual rotation speed at level 1 in humidification mode. In this embodiment, after determining the actual rotation speed and the corresponding rated rotation speed, the formula △T=g*(n) can be used. a-b / N a-b Calculate the temperature correction value ΔT of the outdoor fresh air after passing through the adsorption rotor, where g is the correction coefficient, which can be calibrated through experimental data or determined based on the factory data of the fresh air device.

[0075] S502, obtains the current temperature of the outdoor fresh air passing through the adsorption rotor.

[0076] Specifically, during operation, the fresh air system can heat the outdoor fresh air passing through the adsorption wheel by turning on a heat source, thereby improving the efficiency of moisture removal from the adsorption wheel. In this embodiment, a temperature sensor can be used to obtain the current temperature of the outdoor fresh air passing through the adsorption wheel; see details below. Figure 6 It can be seen that after passing through heat source 2, the outdoor fresh air can enter the adsorption rotor 1. The temperature of area A can be measured to represent the current temperature of the outdoor fresh air passing through the adsorption rotor. Optionally, the range of this current temperature can be [-20℃, 140℃]. It should be noted that the temperature of area A can also be determined by other methods such as infrared detection. This invention does not specifically limit the method for obtaining the current temperature of the outdoor fresh air passing through the adsorption rotor.

[0077] S503, when the sum of the current temperature and the temperature correction value is less than or equal to the preset temperature value, controls the heating power of the heat source to increase the temperature of the outdoor fresh air passing through the adsorption rotor by the temperature correction value.

[0078] Specifically, the preset temperature value in this embodiment can be the highest temperature allowed in region A, such as 140℃. This can be determined by factory parameters or calibrated using experimental data. To prevent the temperature of the adjusted outdoor fresh air passing through the adsorption wheel from exceeding the preset temperature, the sum of the current temperature and the temperature correction value in region A is judged before adjusting the current temperature. If this sum is less than or equal to the preset temperature value, it indicates that the current temperature of region A can still be increased by the temperature correction value ΔT. Therefore, the heat source is controlled to heat the outdoor fresh air passing through the adsorption wheel to increase the temperature correction value ΔT. It is understood that if the sum of the current temperature T and the temperature correction value ΔT in region A is greater than the preset temperature value, it indicates that the temperature of the outdoor fresh air passing through the adsorption wheel is already high. Increasing the temperature may damage the fresh air device. Therefore, other methods or a combination of other methods can be used to ensure the indoor humidification function.

[0079] Figure 7 This is a flowchart of a control method for a fresh air device in a specific embodiment of the present invention.

[0080] like Figure 7 As shown, the control method of the fresh air device in this embodiment includes the following steps:

[0081] S701, the operating status of the fresh air device is detected every first preset time t1;

[0082] S702, the fresh air device is in operation and whether the operating mode and fan speed have changed within the second preset time t2. If yes, proceed to step S703; otherwise, re-execute step S701.

[0083] S703, detects the speed n of the supply side fan and / or exhaust side fan under operating mode a and fan speed b. a-b ;

[0084] S704,n a-b / N a-b If >λ, then proceed to step S705; otherwise, re-execute step S701.

[0085] S705, Filter and adsorption wheel maintenance reminder;

[0086] S706, adjust the speed of the supply side fan and / or exhaust side fan to the rated speed N under operating mode a and fan speed b. a-b ;

[0087] S707, Is the current operating mode humidification mode? If yes, proceed to step S708; otherwise, re-execute step S701.

[0088] S708, (θ-Δθ)>0, if yes, then proceed to step S709, otherwise, re-execute step S701;

[0089] S709, the current angle θ of the bypass ventilation valve decreases by Δθ degrees;

[0090] S710, (T r +ΔT rn ) <T r-max If yes, then proceed to step S711; otherwise, re-execute step S701.

[0091] S711, regeneration temperature T r Increase ΔT rn ℃.

[0092] It should be noted that the meanings of the symbols in this embodiment have been described in detail in the above embodiments, and will not be repeated here.

[0093] In summary, the control method of the fresh air device in this embodiment of the invention can ensure the humidification performance of the fresh air device when it becomes clogged, thereby improving the user experience and the competitiveness of the product.

[0094] Furthermore, the present invention proposes a computer-readable storage medium storing a control program for a fresh air device, which, when executed by a processor, implements the control method for the fresh air device according to the above embodiments.

[0095] The computer-readable storage medium of this invention executes the control program of the fresh air device stored thereon through a processor, which can ensure the humidification performance of the fresh air device when it becomes clogged, thereby improving the user experience and the competitiveness of the product.

[0096] Figure 8 This is a structural block diagram of the first type of fresh air device according to an embodiment of the present invention.

[0097] like Figure 8 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 run 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 embodiments.

[0098] The fresh air device of this invention includes a memory and a processor. The processor executes the control program of the fresh air device stored in the memory, which can ensure the humidification performance of the fresh air device when it becomes clogged, thereby improving the user experience and the competitiveness of the product.

[0099] Figure 9 This is a structural block diagram of the second type of fresh air device according to an embodiment of the present invention.

[0100] like Figure 9 As shown, the present invention proposes a second type of fresh air device 200, which includes an adsorption rotor 1, a heat source 2, a supply air fan 3, an exhaust air fan 4, a bypass duct, and a control component 201. The heat source 2 is used to heat the outdoor fresh air. The adsorption rotor 1 is used to recover the moisture in the indoor return air RA that has passed through the exhaust air fan 4, so that the moisture is released into the room with the outdoor fresh air OA through the supply air fan 3. The bypass duct is set between the outdoor fresh air inlet and the indoor supply air outlet, and is used to guide the outdoor fresh air OA that has not been heated by the heat source 2 into the room through the indoor supply air outlet. The control component 201 is used to: reduce the opening of the bypass vent valve 5 set on the bypass duct and / or increase the heating power of the heat source 2 when it is determined that the adsorption rotor 1 is clogged and the current operating mode of the fresh air device 200 is humidification mode, so as to prevent the humidification performance of the fresh air device 200 from deteriorating.

[0101] In some embodiments of the present invention, the control component is further configured to: control the supply air fan and the exhaust air fan to operate in a constant air volume mode; when it is determined that the fresh air device meets the first preset condition, acquire the actual rotation speed of the supply air fan and / or the exhaust air fan under the current operating mode and gear information; determine the rated rotation speed of the supply air fan and / or the exhaust air fan according to the current operating mode and gear information; and determine that the adsorption rotor is clogged when the ratio of the actual rotation speed to the rated rotation speed is greater than the first preset ratio.

[0102] In some embodiments of the present invention, the control component is further configured to: acquire the operating status of the fresh air device every first preset time interval, and determine that the fresh air device meets the first preset condition when the fresh air device has not adjusted the current operating mode and gear information for a continuous second preset time interval, wherein the first preset time interval is less than the second preset time interval.

[0103] In some embodiments of the present invention, the control component is further configured to: reacquire the operating status of the fresh air device when the current operating mode and gear information are adjusted without a second preset time, or when the ratio of the actual speed to the rated speed is less than or equal to a first preset ratio.

[0104] In some embodiments of the present invention, the control component is further configured to: adjust the speed of the supply air fan and / or the exhaust air fan to the rated speed when it is determined that the adsorption rotor is clogged.

[0105] In some embodiments of the present invention, the control component is further configured to: calculate the opening correction value of the bypass ventilation valve based on the ratio of the actual rotational speed to the rated rotational speed; obtain the current opening of the bypass ventilation valve; and control the opening of the bypass ventilation valve to decrease the opening correction value when the difference between the current opening of the bypass ventilation valve and the opening correction value is greater than or equal to zero.

[0106] In some embodiments of the present invention, the opening correction value is calculated according to the following formula: △θ=d*(n a-b / N a-b ) 2 +e(n a-b / N a-b )+f, where Δθ is the opening correction value, n a-b N represents the actual rotational speed of the supply air fan and / or exhaust air fan when the current operating mode is a and the gear information is b. a-b The rated speed of the supply air fan and / or exhaust air fan when the current operating mode is a and the gear information is b, where d, e, and f are preset parameters.

[0107] In some embodiments of the present invention, the control component is further configured to: calculate a temperature correction value for the outdoor fresh air passing through the adsorption rotor based on the ratio of the actual rotation speed to the rated rotation speed; obtain the current temperature of the outdoor fresh air passing through the adsorption rotor; and control the heating power of the heat source to increase the temperature correction value of the outdoor fresh air passing through the adsorption rotor when the sum of the current temperature and the temperature correction value is less than or equal to a preset temperature value.

[0108] In some embodiments of the present invention, the temperature correction value is calculated according to the following formula: ΔT=g*(n a-b / N a-b ), where ΔT is the temperature correction value, n a-b N represents the actual rotational speed of the supply air fan and / or exhaust air fan when the current operating mode is a and the gear information is b. a-b The rated speed of the supply air fan and / or exhaust air fan when the current operating mode is a and the gear information is b, and g is the correction factor.

[0109] It should be noted that the specific implementation of the fresh air device in this embodiment can be found in the specific implementation of the control method of the fresh air device in the above embodiments, and will not be repeated here.

[0110] In summary, when the fresh air device of this embodiment is operating in humidification mode, if the adsorption rotor becomes clogged, the control component reduces the opening of the bypass ventilation valve located on the bypass ventilation duct. This reduces the amount of unheated outdoor fresh air being directed into the room through the indoor air outlet, thus increasing the amount of outdoor fresh air passing through the heat source and improving humidification performance. The control component can also increase the temperature of the outdoor fresh air passing through the adsorption rotor, thereby improving humidification performance and preventing the humidification performance of the fresh air device from deteriorating. Therefore, the fresh air device in this embodiment can maintain its humidification performance even when clogged, thereby improving the user experience and the product's competitiveness.

[0111] 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). Alternatively, the computer-readable medium may be paper or other suitable media on which the program can be printed, since the program can be obtained electronically, for example, by optically scanning the paper or other medium, followed by editing, interpreting, or otherwise processing as necessary, and then stored in a computer memory.

[0112] 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.

[0113] 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.

[0114] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing this invention and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0115] 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.

[0116] In this invention, unless otherwise explicitly specified or limited in the embodiments, the terms "installation," "connection," "joining," and "fixing" appearing in the embodiments should be interpreted broadly. For example, a connection can be a fixed connection, a detachable connection, or an integral part; 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 the internal communication of two components, or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific implementation.

[0117] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0118] 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 control method for a fresh air device, characterized in that, The fresh air device includes an adsorption rotor, a heat source, a supply side fan, an exhaust side fan, and a bypass duct. The heat source is used to heat the outdoor fresh air. The adsorption rotor is used to recover moisture from the indoor return air passing through the exhaust side fan, so that the moisture is released into the room along with the outdoor fresh air through the supply side fan. The bypass duct is located between the outdoor fresh air inlet and the indoor supply air inlet, and is used to guide the outdoor fresh air, which has not been heated by the heat source, into the room through the indoor supply air inlet. The control method includes: When it is determined that the adsorption rotor is clogged and the current operating mode of the fresh air device is humidification mode, the opening of the bypass ventilation valve installed on the bypass ventilation duct is reduced and the heating power of the heat source is increased to prevent the humidification performance of the fresh air device from deteriorating. Determining that the adsorption rotor is clogged includes: The supply air fan and the exhaust air fan are controlled to operate in a constant air volume mode; When it is determined that the fresh air device meets the first preset condition, the actual speed of the supply air fan and / or the exhaust air fan under the current operating mode and gear information is obtained. The rated speed of the supply air fan and / or the exhaust air fan is determined based on the current operating mode and the gear information. When the ratio of the actual rotation speed to the rated rotation speed is greater than a first preset ratio, it is determined that the adsorption rotor is clogged. Reducing the opening degree of the bypass ventilation valve installed on the bypass ventilation duct includes: The opening correction value of the bypass ventilation valve is calculated based on the ratio of the actual rotational speed to the rated rotational speed. Obtain the current opening degree of the bypass ventilation valve; When the difference between the current opening degree of the bypass ventilation valve and the opening degree correction value is greater than or equal to zero, the opening degree of the bypass ventilation valve is controlled to decrease by the opening degree correction value. The opening correction value is calculated using the following formula: △θ=d*(n a-b / N a-b ) 2 +e(n a-b / N a-b )+f Where △θ is the opening correction value, n a-b The actual rotational speed (N) of the supply air fan and / or the exhaust air fan when the current operating mode is a and the gear information is b. a-b The rated speed of the supply air fan and / or the exhaust air fan when the current operating mode is a and the gear information is b, where d, e, and f are preset parameters.

2. The control method according to claim 1, characterized in that, Determining that the fresh air device meets the first preset condition includes: The operating status of the fresh air device is acquired at a first preset time interval. When the fresh air device has not adjusted the current operating mode and gear information for a second preset time interval, it is determined that the fresh air device meets the first preset condition, wherein the first preset time interval is less than the second preset time interval.

3. The control method according to claim 2, characterized in that, The control method further includes: When the fresh air device does not adjust the current operating mode and gear information for the second preset time, or when the ratio of the actual speed to the rated speed is less than or equal to the first preset ratio, the operating status of the fresh air device is reacquired.

4. The control method according to claim 1, characterized in that, The control method further includes: When it is determined that the adsorption rotor is clogged, the rotation speed of the supply air fan and / or the exhaust air fan is adjusted to the rated rotation speed.

5. The control method according to claim 4, characterized in that, Increasing the heating power of the heat source includes: The temperature correction value of the outdoor fresh air passing through the adsorption rotor is calculated based on the ratio of the actual rotation speed to the rated rotation speed. Obtain the current temperature of the outdoor fresh air that has passed through the adsorption rotor; When the sum of the current temperature and the temperature correction value is less than or equal to a preset temperature value, the heating power of the heat source is controlled to increase the temperature of the outdoor fresh air passing through the adsorption wheel by the temperature correction value.

6. The control method according to claim 5, characterized in that, The temperature correction value is calculated using the following formula: △T=g*(n a-b / N a-b ) Where △T is the temperature correction value, n a-b The actual rotational speed (N) of the supply air fan and / or the exhaust air fan when the current operating mode is a and the gear information is b. a-b The rated speed of the supply air fan and / or the exhaust air fan when the current operating mode is a and the gear information is b, and g is a correction coefficient.

7. A computer-readable storage medium, characterized in that, It stores a control program for a fresh air device, which, when executed by a processor, implements the control method for the fresh air device according to any one of claims 1-6.

8. A fresh air device, characterized in that, The system includes a memory, a processor, and a control program for a fresh air device stored in the memory and executable on the processor. When the processor executes the control program for the fresh air device, it implements the control method for the fresh air device according to any one of claims 1-6.

9. A fresh air device, characterized in that, The fresh air device is used to implement the control method for the fresh air device according to any one of claims 1-6. The fresh air device includes an adsorption rotor, a heat source, a supply side fan, an exhaust side fan, a bypass duct, and a control component. The heat source is used to heat the outdoor fresh air. The adsorption rotor is used to recover moisture from the indoor return air passing through the exhaust side fan, so that the moisture is released into the room along with the outdoor fresh air through the supply side fan. The bypass duct is disposed between the outdoor fresh air inlet and the indoor supply air inlet, and is used to guide the outdoor fresh air that has not been heated by the heat source into the room through the indoor supply air inlet. The control component is used for: When it is determined that the adsorption rotor is clogged and the current operating mode of the fresh air device is humidification mode, the opening of the bypass ventilation valve installed on the bypass ventilation duct is reduced and / or the heating power of the heat source is increased to prevent the humidification performance of the fresh air device from deteriorating.

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