Method and device for controlling fresh air device, fresh air device, and storage medium

Abstract

This application provides a control method, control device, fresh air device, and storage medium for a fresh air system. The fresh air device has a fresh air mode for introducing outdoor air into the room and an exhaust mode for expelling indoor air to the outside. The control method includes: acquiring the real-time concentration of indoor pollutants, including at least one of formaldehyde, PM2.5, and TVOC; when the real-time concentration of indoor pollutants is greater than or equal to a first preset concentration, the fresh air device activates either the exhaust mode or the fresh air mode; and upon reaching a preset condition, the fresh air device switches between the exhaust mode and the fresh air mode. The fresh air device provided by this application repeatedly switches between fresh air mode and exhaust mode according to a preset condition, rapidly expelling polluted indoor air while simultaneously introducing fresh outdoor air with a higher oxygen content, thus quickly improving indoor air quality.

Description

Technical Field

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

[0002] With the rapid development of technology, people's demands for quality of life are also increasing, and consumer needs are becoming more diversified. Therefore, the diversification and efficiency of air conditioners are an inevitable development trend.

[0003] To prevent air quality problems caused by excessively high concentrations of pollutants such as formaldehyde, PM2.5, and TVOC (Total Volatile Organic Compounds), air conditioner indoor units are typically equipped with a fresh air system that connects to the outdoor environment, introducing outdoor air into the indoor space. Existing fresh air systems usually also have an exhaust function, drawing in fresh outdoor air and expelling stale indoor air. However, simply turning on either the fresh air or exhaust function is insufficient to quickly reduce indoor pollutant concentrations and improve indoor air quality. Summary of the Invention

[0004] This application provides a control method, control device, fresh air device, and storage medium for a fresh air device, which at least solves the technical problem that fresh air devices in the prior art cannot quickly improve indoor air quality.

[0005] To achieve the above objectives, this application provides a control method for a fresh air device, the fresh air device including an air quality sensor, the fresh air device having a fresh air mode for introducing outdoor air into the room and an exhaust mode for expelling indoor air to the outside, and the control method for the fresh air device including:

[0006] The real-time concentration of indoor pollutants is obtained, wherein the indoor pollutants include at least one of formaldehyde, PM2.5 and TVOC;

[0007] When the real-time concentration of the indoor pollutants is greater than or equal to the first preset concentration, the fresh air device activates the exhaust mode or the fresh air mode.

[0008] When a preset condition is met, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other.

[0009] Optionally, the step of switching the fresh air device from one of the exhaust mode and the fresh air mode to another upon reaching a preset condition includes:

[0010] For every preset gradient decrease in the real-time concentration of indoor pollutants, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other.

[0011] Optionally, the step of switching the fresh air device from one of the exhaust mode and the fresh air mode to another upon reaching a preset condition includes:

[0012] After each preset time period of operation, the fresh air device switches from one of the exhaust mode to the other.

[0013] Optionally, after the step of switching the fresh air device from one of the exhaust mode and the fresh air mode to another, the control method of the fresh air device further includes:

[0014] When the real-time concentration of indoor pollutants decreases to a second preset concentration, the fresh air device maintains the fresh air mode, or switches to the fresh air mode and maintains it.

[0015] Optionally, the step of switching the fresh air device from one of the exhaust mode and the fresh air mode to another includes:

[0016] When the fresh air device switches from the exhaust mode to the fresh air mode, the fresh air device stops operating in the exhaust mode and starts operating in the fresh air mode after a second preset time.

[0017] Optionally, the step of switching the fresh air device from one of the exhaust mode and the fresh air mode to another includes:

[0018] When the fresh air device switches from the exhaust mode to the fresh air mode, the fresh air device stops operating in the exhaust mode and obtains the real-time concentration of pollutants at the outdoor ventilation opening of the fresh air device.

[0019] When the real-time concentration of pollutants at the outdoor vent is less than or equal to a third preset concentration, the fresh air device activates the fresh air mode.

[0020] Optionally, after the steps of stopping the exhaust mode of the fresh air device and obtaining the real-time concentration of pollutants at the outdoor vent of the fresh air device, the method further includes:

[0021] When the real-time concentration of pollutants at the outdoor vent exceeds the third preset concentration, the fresh air device will activate the fresh air mode after the third preset time.

[0022] To achieve the above objectives, this application also provides a control device for a fresh air device, the control device comprising: a memory, a processor, and a control program for the fresh air device stored in the memory and executable on the processor, wherein when the control program for the fresh air device is executed by the processor, it implements the various steps of the control method for the fresh air device as described above.

[0023] To achieve the above objectives, this application also provides a fresh air device, which includes an air quality sensor and has a fresh air mode for introducing outdoor air into the room and an exhaust mode for expelling indoor air to the outside. The fresh air device 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 control program for the fresh air device is executed by the processor, it implements the various steps of the control method for the fresh air device as described above.

[0024] To achieve the above objectives, this application also provides a storage medium storing a control program for a fresh air device, wherein the control program for the fresh air device, when executed by a processor, implements the steps of the control method for the fresh air device as described above.

[0025] The technical solution proposed in this application includes a fresh air device comprising an air quality sensor. The device has a fresh air mode for introducing outdoor air into the room and an exhaust mode for expelling indoor air to the outside. The control method of the fresh air device involves first acquiring the real-time concentration of indoor pollutants, including at least one of formaldehyde, PM2.5, and TVOC. When the real-time concentration of indoor pollutants is greater than or equal to a first preset concentration, the fresh air device activates either the exhaust mode or the fresh air mode. Due to the activation of the fresh air mode or the exhaust mode, the concentration of indoor pollutants decreases. By setting a preset condition, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other each time the preset condition is met. The fresh air device provided in this application repeatedly switches between fresh air mode and exhaust mode according to the preset condition, rapidly expelling polluted indoor air while simultaneously introducing fresh outdoor air with a higher oxygen content, thus achieving a rapid improvement in indoor air quality. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1This is a schematic diagram of the terminal structure of the fresh air device involved in the embodiments of this application;

[0028] Figure 2 This is a flowchart illustrating the first embodiment of the control method for the fresh air device of this application;

[0029] Figure 3 This is a schematic diagram of the fresh air device provided in the embodiment of this application in fresh air mode;

[0030] Figure 4 This is a schematic diagram of the fresh air device provided in the embodiment of this application in exhaust mode;

[0031] Figure 5 This is a schematic diagram of the fresh air device provided in the embodiment of this application in the internal circulation mode;

[0032] Figure 6 This is a schematic diagram of the fresh air device provided in the embodiments of this application in dual circulation mode;

[0033] Figure 7 This is a flowchart illustrating the second embodiment of the control method for the fresh air device of this application;

[0034] Figure 8 This is a flowchart illustrating the third embodiment of the control method for the fresh air device of this application;

[0035] Figure 9 This is a flowchart illustrating the fourth embodiment of the control method for the fresh air device of this application;

[0036] Figure 10 This is a flowchart illustrating the fifth embodiment of the control method for the fresh air device of this application;

[0037] Figure 11 This is a flowchart illustrating the sixth embodiment of the control method for the fresh air device of this application.

[0038] Explanation of icon numbers:

[0039] label name label name 10 case 132 Connecting port 11 First chamber 133 Second valve 111 Outdoor air duct 20 Fan 112 Indoor air duct 21 air inlet end 113 Outdoor ventilation openings 22 air outlet 114 Indoor air inlet 30 Filtration device 115 First valve 1001 processor 12 Second chamber 1002 memory 13 Third chamber 1003 Communication bus 131 Indoor air outlet 1004 Air quality sensor

[0040] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0041] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0042] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0043] In this application, the term "exemplary" is used to mean "used as an example, illustration, or description." Any embodiment described as "exemplary" in this application is not necessarily to be construed as being more preferred or advantageous than other embodiments. The following description is provided to enable any person skilled in the art to make and use this application. Details are set forth in the following description for purposes of explanation. It should be understood that those skilled in the art will recognize that this application can be made without using these specific details. In other instances, well-known structures and processes are not described in detail to avoid obscuring the description of this application with unnecessary detail. Therefore, this application is not intended to be limited to the embodiments shown, but is consistent with the broadest scope of the principles and features disclosed in this application.

[0044] This application provides a control method for a fresh air device, which will be described in detail below.

[0045] The main solution of this application embodiment is: to obtain the real-time concentration of indoor pollutants, wherein the indoor pollutants include at least one of formaldehyde, PM2.5 and TVOC; when the real-time concentration of the indoor pollutants is greater than or equal to a first preset concentration, the fresh air device turns on the exhaust mode or the fresh air mode; each time a preset condition is reached, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other.

[0046] Because current technology only allows fresh air devices to simply turn on the fresh air or exhaust function, it is difficult to quickly reduce the concentration of indoor pollutants and improve indoor air quality.

[0047] This application provides a solution in which, by setting a preset condition, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other when the preset condition is met. Thus, the fresh air device repeatedly switches between the fresh air mode and the exhaust mode, breathing in and out, quickly expelling the polluted indoor air to the outside while simultaneously introducing fresh outdoor air with a higher oxygen content, thereby achieving the effect of rapidly improving indoor air quality.

[0048] Please see Figure 1 , Figure 1 This is a schematic diagram of the terminal structure of the fresh air device involved in the embodiments of this application.

[0049] The terminal in this application embodiment is a fresh air device, or it may be an air conditioner or an air purifier that includes the fresh air device.

[0050] like Figure 1 As shown, the terminal may include: a processor 1001, such as a CPU, a memory 1002, a communication bus 1003, and an air quality sensor 1004. The communication bus 1003 is used to enable communication between the various components of the terminal.

[0051] The control method for the fresh air device provided in this application applies to a fresh air device including an air quality sensor 1004; the fresh air device has a fresh air mode for introducing outdoor air into the room and an exhaust mode for expelling indoor air to the outside.

[0052] Please see Figure 3 , Figure 3 This is a schematic diagram of the fresh air device provided in the embodiment of this application in fresh air mode. The fresh air device includes: a housing 10 and a fan 20. The housing 10 defines a first chamber 11, a second chamber 12, and a third chamber 13 that are connected in sequence. The fan 20 is disposed in the second chamber 12, and the air inlet 21 and air outlet 22 of the fan 20 are respectively connected to the first chamber 11 and the third chamber 13. The first chamber 11 defines an outdoor air duct 111 and an indoor air duct 112 that are connected to each other. The outdoor air duct 111 is connected to an outdoor ventilation opening 113, and the indoor air duct 112 is connected to an indoor air inlet 114. A first valve 115 is provided at the connection between the outdoor vent 111 and the indoor air duct 112, and the first valve 115 can control the connection between the outdoor vent 113 and / or the indoor air inlet 114 and the first chamber 11; an indoor air outlet 131 and a connection port 132 connecting the outdoor air duct 111 are provided on the side wall of the third chamber 13, and a second valve 133 is provided at the connection port 132, and the second valve 133 can control the connection between the outdoor air duct 111 and the third chamber 13 or the connection between the indoor air outlet 131 and the third chamber 13.

[0053] Please refer to it again. Figure 3 When the fresh air device is in the fresh air mode, the first valve 115 blocks the connection between the indoor air inlet 114 and the first chamber 11, and the outdoor vent 113 is connected to the first chamber 11; at the same time, the second valve 133 blocks the connection between the outdoor air duct 111 and the third chamber 13, and the indoor air outlet 131 is connected to the third chamber 13.

[0054] Please see Figure 4 , Figure 4 This is a schematic diagram of the fresh air device provided in the embodiment of this application in exhaust mode. When the fresh air device is in exhaust mode, the first valve 115 blocks the connection between the outdoor vent 113 and the first chamber 11, and the indoor air inlet 114 and the first chamber 11 are connected; at the same time, the second valve 133 blocks the connection between the indoor air outlet 131 and the third chamber 13, and the outdoor air duct 111 and the third chamber 13 are connected.

[0055] Please see Figure 5 , Figure 5 This is a schematic diagram of the fresh air device provided in this application embodiment in internal circulation mode. Specifically, the fresh air device is further provided with a filter device 30 at the connection between the first chamber 11 and the second chamber 12, and the fresh air device also has an internal circulation mode. When the fresh air device is in the internal circulation mode, the first valve 115 blocks the connection between the outdoor vent 113 and the first chamber 11, and the indoor air inlet 114 is connected to the first chamber 11; at the same time, the second valve 133 blocks the connection between the outdoor duct 111 and the third chamber 13, and the indoor air outlet 131 is connected to the third chamber 13.

[0056] Please see Figure 6 , Figure 6 This is a schematic diagram of the fresh air device provided in this application embodiment in dual-circulation mode. Specifically, the fresh air device also has a dual-circulation mode. When the fresh air device is in the dual-circulation mode, the indoor air inlet 114 and the outdoor vent 113 are simultaneously connected to the first chamber 11; at the same time, the second valve 133 blocks the connection between the outdoor duct 111 and the third chamber 13, and the indoor air outlet 131 is connected to the third chamber 13.

[0057] Memory 1002 can be high-speed RAM or stable memory (no n-volatile memory), such as disk storage. Figure 1As shown, the memory 1002, which serves as a computer storage medium, may include a control application program for the fresh air system, and the processor 1001 can be used to call the control application program for the fresh air system stored in the memory 1002 and perform the following operations:

[0058] The real-time concentration of indoor pollutants is obtained, wherein the indoor pollutants include at least one of formaldehyde, PM2.5 and TVOC;

[0059] When the real-time concentration of the indoor pollutants is greater than or equal to the first preset concentration, the fresh air device activates the exhaust mode or the fresh air mode.

[0060] When a preset condition is met, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other.

[0061] Furthermore, the processor 1001 can be used to call the control application of the fresh air device stored in the memory 1002, and also perform the following operations:

[0062] For every preset gradient decrease in the real-time concentration of indoor pollutants, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other.

[0063] Furthermore, the processor 1001 can be used to call the control application of the fresh air device stored in the memory 1002, and also perform the following operations:

[0064] After each preset time period of operation, the fresh air device switches from one of the exhaust mode to the other.

[0065] Furthermore, the processor 1001 can be used to call the control application of the fresh air device stored in the memory 1002, and also perform the following operations:

[0066] When the real-time concentration of indoor pollutants decreases to a second preset concentration, the fresh air device maintains the fresh air mode, or switches to the fresh air mode and maintains it.

[0067] Furthermore, the processor 1001 can be used to call the control application of the fresh air device stored in the memory 1002, and also perform the following operations:

[0068] When the fresh air device switches from the exhaust mode to the fresh air mode, the fresh air device stops operating in the exhaust mode and starts operating in the fresh air mode after a second preset time.

[0069] Furthermore, the processor 1001 can be used to call the control application of the fresh air device stored in the memory 1002, and also perform the following operations:

[0070] When the fresh air device switches from the exhaust mode to the fresh air mode, the fresh air device stops operating in the exhaust mode and obtains the real-time concentration of pollutants at the outdoor ventilation opening 113 of the fresh air device.

[0071] When the real-time concentration of pollutants at the outdoor vent 113 is less than or equal to the third preset concentration, the fresh air device activates the fresh air mode.

[0072] Furthermore, the processor 1001 can be used to call the control application of the fresh air device stored in the memory 1002, and also perform the following operations:

[0073] When the real-time concentration of pollutants at the outdoor vent 113 is greater than the third preset concentration, the fresh air device will activate the fresh air mode after the third preset time.

[0074] Based on the above hardware architecture, an embodiment of the control method for the fresh air device of this application is proposed.

[0075] Please see Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of the control method for the fresh air device of this application. The control method for the fresh air device includes:

[0076] Step S10: Obtain the real-time concentration of indoor pollutants, wherein the indoor pollutants include at least one of formaldehyde, PM2.5 and TVOC.

[0077] It is understood that, in this embodiment of the application, the fresh air device includes an air quality sensor 1004, which can detect the real-time concentration of indoor pollutants. The indoor pollutants include at least one of formaldehyde, PM2.5, and TVOC.

[0078] Step S20: When the real-time concentration of the indoor pollutants is greater than or equal to the first preset concentration, the fresh air device turns on the exhaust mode or the fresh air mode.

[0079] It is understood that the first preset concentration can be set according to the environment in which the fresh air device is applied. For example, the preset concentration may be different or the same in southern and northern regions due to different environments; or the user may set the first preset concentration according to their own sensitivity to air pollutants. When the real-time concentration of indoor pollutants is greater than or equal to the first preset concentration, the fresh air device may, according to its settings, first activate the exhaust mode or the fresh air mode. Specifically, in this embodiment, when the real-time concentration of indoor pollutants is greater than or equal to the first preset concentration, the fresh air device first activates the exhaust mode.

[0080] In other embodiments, users can also actively activate the rapid purification mode, which repeatedly switches between the exhaust mode and the fresh air mode, according to their own circumstances. It is understood that when a user actively activates the rapid purification mode, the air quality sensor 1004 acquires the current concentration of indoor pollutants and then uses this concentration as a benchmark to implement subsequent operating steps.

[0081] In step S30, each time a preset condition is met, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other.

[0082] Understandably, by pre-setting a trigger condition, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other each time the trigger condition is met. In this way, the fresh air device can repeatedly switch between fresh air mode and exhaust mode, expelling stale indoor air to the outside while simultaneously introducing fresh outdoor air with a higher oxygen content, thus rapidly improving indoor air quality.

[0083] Specifically, please refer to Figure 7 , Figure 7 This is a flowchart illustrating a second embodiment of the control method for the fresh air device of this application. Based on the first embodiment, step S30 includes:

[0084] Step S31: For every preset gradient decrease in the real-time concentration of indoor pollutants, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other.

[0085] It is understood that in this embodiment, the preset condition is defined as a decrease in the real-time concentration of indoor pollutants by a preset gradient. When the fresh air device activates either the exhaust mode or the fresh air mode, the concentration of indoor pollutants will decrease accordingly. After the real-time concentration of indoor pollutants decreases by a preset gradient, the fresh air device switches from one of the exhaust mode to the other. For example, when the fresh air device activates the exhaust mode, the concentration of indoor pollutants decreases accordingly. When the real-time concentration of indoor pollutants decreases by the preset gradient, the fresh air device switches from the exhaust mode to the fresh air mode. Furthermore, as the real-time concentration of indoor pollutants decreases by the preset gradient again, the fresh air device switches from the fresh air mode back to the exhaust mode. This process repeats, and the fresh air device, by inhaling and exhaling, can quickly expel polluted indoor air to the outside while simultaneously introducing fresh outdoor air with a higher oxygen content, thus rapidly improving indoor air quality.

[0086] Specifically, for every 10% to 25% decrease in the real-time concentration of indoor pollutants, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other. In this embodiment, the preset gradient is 10%. This means that when the real-time concentration of indoor pollutants is greater than or equal to a first preset concentration, the fresh air device activates the exhaust mode and records the indoor pollutant concentration value M. After the exhaust mode has been activated for a period of time, when the real-time concentration of indoor pollutants decreases to 90%M, the fresh air device switches from the exhaust mode to the fresh air mode. As the fresh air mode is activated, when the real-time concentration of indoor pollutants decreases to 80%M, the fresh air device switches back to the exhaust mode. This process repeats, quickly expelling polluted indoor air while simultaneously introducing fresh outdoor air with higher oxygen content, thus rapidly improving indoor air quality.

[0087] Specifically, please refer to Figure 8 , Figure 8 This is a flowchart illustrating the third embodiment of the control method for the fresh air device of this application. Based on the first embodiment, step S30 includes:

[0088] Step S32: After the exhaust mode or the fresh air mode has been running for a first preset time, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other.

[0089] It is understood that in this embodiment, the switching between the exhaust mode and the fresh air mode by the fresh air device is time-based. For example, the first preset time is ten minutes. When the fresh air device starts the exhaust mode, the concentration of indoor pollutants decreases accordingly. After the exhaust mode runs for ten minutes, the fresh air device switches from the exhaust mode to the fresh air mode. Furthermore, after the fresh air mode also runs for ten minutes, the fresh air device switches back to the exhaust mode. This repeated process can quickly expel the polluted indoor air to the outside while simultaneously introducing fresh outdoor air with a higher oxygen content, thus rapidly improving indoor air quality.

[0090] Further, please refer to Figure 9 , Figure 9 This is a flowchart illustrating a fourth embodiment of the control method for the fresh air device of this application. Based on the first, second, or third embodiment, after step S30, S31, or S32, the control method for the fresh air device further includes:

[0091] S40, when the real-time concentration of indoor pollutants decreases to the second preset concentration, the fresh air device maintains the fresh air mode, or switches to the fresh air mode and maintains it.

[0092] The second preset concentration can be set according to the user's needs. For example, the second concentration can be 15% or 20% of the first preset concentration, or it can be 15% or 20% of the current indoor pollutant concentration when the fresh air device is in rapid purification mode, repeatedly switching between exhaust mode and fresh air mode. This is not limited here. It is understood that as the exhaust mode and fresh air mode are repeatedly switched, the real-time concentration of indoor pollutants will continuously decrease. When the real-time concentration of indoor pollutants decreases to the second preset concentration, the fresh air device no longer needs to continuously switch modes; it only needs to maintain the fresh air mode to ensure stable indoor air quality. Due to the different preset gradients and the different second preset concentrations, when the real-time concentration of indoor pollutants decreases to the second preset concentration, the fresh air device may be in either exhaust mode or fresh air mode. If it is in fresh air mode, it does not need to switch; it can maintain the fresh air mode. If it is in exhaust mode, it should switch to fresh air mode and maintain it.

[0093] Specifically, please refer to Figure 10 , Figure 10 This is a flowchart illustrating the fifth embodiment of the control method for the fresh air device of this application. Based on the first, second, or third embodiment, step S30, S31, or S32 includes:

[0094] S301, when the fresh air device switches from the exhaust mode to the fresh air mode, the fresh air device stops operating in the exhaust mode and starts the fresh air mode after a second preset time.

[0095] It is understood that the intake and exhaust of the fresh air device are both achieved through the outdoor vent 113. When the exhaust mode ends, the air quality around the outdoor vent 113 is relatively turbid and the pollution concentration is slightly high. When the fresh air device switches from the exhaust mode to the fresh air mode, the fresh air device stops operating first and then turns on the fresh air mode again after the second preset time. In this way, during the time when the fresh air device stops operating, the polluted air around the outdoor vent 113 will be dispersed or diluted, so as to avoid the pollutant concentration in the fresh air being too high when the fresh air mode is turned on, which would affect the indoor air purification effect.

[0096] Specifically, please refer to Figure 11 , Figure 11 This is a flowchart illustrating the sixth embodiment of the control method for the fresh air device of this application. Based on the first, second, or third embodiment, step S30, S31, or S32 includes:

[0097] S302, when the fresh air device switches from the exhaust mode to the fresh air mode, the fresh air device stops operating in the exhaust mode and obtains the real-time concentration of pollutants at the outdoor ventilation opening 113 of the fresh air device;

[0098] S303, when the real-time concentration of pollutants at the outdoor vent 113 is less than or equal to the third preset concentration, the fresh air device activates the fresh air mode.

[0099] Understandably, when the exhaust mode ends, the air quality around the outdoor vent 113 is relatively turbid with a slightly higher pollution concentration. When the fresh air device switches from the exhaust mode to the fresh air mode, the fresh air device first stops operating. Simultaneously, the air quality sensor 1004 detects the real-time concentration of pollutants at the outdoor vent 113 of the fresh air device. As the fresh air device stops operating, the turbid air at the outdoor vent 113 will be dispersed or diluted. When the real-time concentration of pollutants at the outdoor vent 113 is less than or equal to a third preset concentration, the fresh air device then restarts the fresh air mode. The third preset concentration can be set according to actual needs and is not limited here.

[0100] Furthermore, after step S302, the method further includes:

[0101] S304, when the real-time concentration of pollutants at the outdoor vent 113 is greater than the third preset concentration, the fresh air device will activate the fresh air mode after the third preset time.

[0102] Understandably, as the fresh air system stops operating, the polluted air at the outdoor vent 113 will be dispersed or diluted. If the pollutant concentration at the outdoor vent 113 fails to reach the third preset concentration, the fresh air system will activate the fresh air mode after a third preset time. This ensures that the switching between the exhaust mode and the fresh air mode is uninterrupted, avoiding any impact on subsequent indoor air purification. The third preset time can be set according to actual needs, such as three minutes, four minutes, or five minutes, and is not limited here.

[0103] This application also provides a control device for a fresh air device, which includes: a memory 1002, a processor 1001, and a control program for the fresh air device stored in the memory 1002 and executable on the processor 1001. When the control program for the fresh air device is executed by the processor 1001, it implements the various steps of the control method for the fresh air device as described in any of the above embodiments.

[0104] This application also provides a fresh air device, which includes an air quality sensor 1004. The fresh air device has a fresh air mode for introducing outdoor air into the room and an exhaust mode for expelling indoor air to the outside. The fresh air device also includes a memory 1002, a processor 1001, and a control program for the fresh air device stored in the memory 1002 and executable on the processor 1001. When the control program for the fresh air device is executed by the processor 1001, it implements the various steps of the control method for the fresh air device as described in any of the above embodiments.

[0105] Specifically, in this embodiment, the fresh air device includes: a housing 10 and a fan 20. The housing 10 defines a first chamber 11, a second chamber 12, and a third chamber 13 that are sequentially connected. The fan 20 is disposed in the second chamber 12, and the air inlet 21 and air outlet 22 of the fan 20 are respectively connected to the first chamber 11 and the third chamber 13. The first chamber 11 defines an outdoor air duct 111 and an indoor air duct 112 that are interconnected. The outdoor air duct 111 is connected to an outdoor ventilation opening 113, and the indoor air duct 112 is connected to an indoor air inlet 114. A first valve 115 is provided at the connection between the outdoor air duct 111 and the indoor air duct 112, and the first valve 115 can control the connection between the outdoor vent 113 and / or the indoor air inlet 114 and the first chamber 11; an indoor air outlet 131 and a connection port 132 connecting the outdoor air duct 111 are provided on the side wall of the third chamber 13, and a second valve 133 is provided at the connection port 132, and the second valve 133 can control the connection between the outdoor air duct 111 and the third chamber 13 or the connection between the indoor air outlet 131 and the third chamber 13.

[0106] Furthermore, when the fresh air device is in the fresh air mode, the first valve 115 blocks the connection between the indoor air inlet 114 and the first chamber 11, and the outdoor vent 113 is connected to the first chamber 11; at the same time, the second valve 133 blocks the connection between the outdoor duct 111 and the third chamber 13, and the indoor air outlet 131 is connected to the third chamber 13.

[0107] Furthermore, when the fresh air device is in the exhaust mode, the first valve 115 blocks the connection between the outdoor vent 113 and the first chamber 11, and the indoor air inlet 114 is connected to the first chamber 11; at the same time, the second valve 133 blocks the connection between the indoor air outlet 131 and the third chamber 13, and the outdoor air duct 111 is connected to the third chamber 13.

[0108] Furthermore, the fresh air device is equipped with a filter device 30 at the connection between the first chamber 11 and the second chamber 12, and the fresh air device also has an internal circulation mode. When the fresh air device is in the internal circulation mode, the first valve 115 blocks the connection between the outdoor vent 113 and the first chamber 11, and the indoor air inlet 114 is connected to the first chamber 11; at the same time, the second valve 133 blocks the connection between the outdoor duct 111 and the third chamber 13, and the indoor air outlet 131 is connected to the third chamber 13.

[0109] Furthermore, the fresh air device also has a dual circulation mode. When the fresh air device is in the dual circulation mode, the indoor air inlet 114 and the outdoor vent 113 are simultaneously connected to the first chamber 11; at the same time, the second valve 133 blocks the connection between the outdoor duct 111 and the third chamber 13, and the indoor air outlet 131 is connected to the third chamber 13.

[0110] This application also provides a storage medium storing a control program for a fresh air device, which, when executed by a processor 1001, implements the steps of the control method for the fresh air device as described in any of the above embodiments.

[0111] The control method, control device, fresh air device, and storage medium of a fresh air device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A fresh air device, characterized in that The fresh air device includes a shell and a fan, and has a fresh air mode for introducing outdoor air into a room and an exhaust mode for discharging indoor air to the outside; the shell defines a first chamber, a second chamber and a third chamber in sequence; the fan is arranged in the second chamber, and an air inlet end and an air outlet end of the fan are communicated with the first chamber and the third chamber respectively; the first chamber defines an outdoor air duct and an indoor air duct which are communicated with each other, the outdoor air duct is connected with an outdoor air inlet, the indoor air duct is connected with an indoor air inlet, a first valve is arranged at the communication position of the outdoor air duct and the indoor air duct, and the first valve can control the communication between the outdoor air inlet and / or the indoor air inlet and the first chamber; an indoor air outlet and a communication port communicated with the outdoor air duct are arranged on a side wall of the third chamber, and a second valve is arranged at the communication port, and the second valve can control the communication between the outdoor air duct and the third chamber or the communication between the indoor air outlet and the third chamber; When the fresh air device is in the fresh air mode, the first valve blocks the communication between the indoor air inlet and the first chamber, and the outdoor air inlet is communicated with the first chamber; the second valve blocks the communication between the outdoor air duct and the third chamber, and the indoor air outlet is communicated with the third chamber; When the fresh air device is in the exhaust mode, the first valve blocks the communication between the outdoor air inlet and the first chamber, and the indoor air inlet is communicated with the first chamber; the second valve blocks the communication between the indoor air outlet and the third chamber, and the outdoor air duct is communicated with the third chamber.

2. A control method of a fresh air device, characterized by, The control method of the fresh air device of claim 1 comprises: obtaining the real-time concentration of indoor pollutants, wherein the indoor pollutants include at least one of formaldehyde, PM2.5 and TVOC; when the real-time concentration of the indoor pollutants is greater than or equal to a first preset concentration, the fresh air device starts the exhaust mode or the fresh air mode; every time a preset condition is met, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other.

3. The control method of the fresh air device according to claim 2, characterized by, The step of every time a preset condition is met, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other, comprises: every time the real-time concentration of the indoor pollutants decreases by a preset gradient, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other.

4. The control method of the fresh air device according to claim 2, characterized by, The step of every time a preset condition is met, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other, comprises: after the exhaust mode or the fresh air mode is operated for a first preset time, the fresh air device switches from one of the exhaust mode and the fresh air mode to the other.

5. The control method of the fresh air device according to any one of claims 2 to 4, characterized in that, After the step of the fresh air device switching from one of the exhaust mode and the fresh air mode to the other, the control method of the fresh air device further comprises: When the real-time concentration of the indoor pollutant decreases to a second preset concentration, the fresh air device keeps the fresh air mode, or switches to the fresh air mode and keeps.

6. The control method of the fresh air device according to any one of claims 2 to 4, characterized in that, The step of switching the fresh air device from one of the exhaust mode and the fresh air mode to the other includes: When the fresh air device is switched from the exhaust mode to the fresh air mode, the fresh air device stops running the exhaust mode, and starts the fresh air mode after a second preset time.

7. The control method of the fresh air device according to any one of claims 2 to 4, characterized by, The step of switching the fresh air device from one of the exhaust mode and the fresh air mode to the other includes: When the fresh air device is switched from the exhaust mode to the fresh air mode, the fresh air device stops running the exhaust mode, and acquires the real-time concentration of the pollutant at the outdoor ventilation opening of the fresh air device; When the real-time concentration of the pollutant at the outdoor ventilation opening is less than or equal to a third preset concentration, the fresh air device starts the fresh air mode.

8. The control method of the fresh air device according to claim 7, characterized by, The step of stopping the fresh air device from running the exhaust mode and acquiring the real-time concentration of the pollutant at the outdoor ventilation opening of the fresh air device further includes: When the real-time concentration of the pollutant at the outdoor ventilation opening is greater than the third preset concentration, the fresh air device starts the fresh air mode after a third preset time.

9. A control device of a fresh air device, characterized by The control device of the fresh air device includes a memory, a processor, and a fresh air device control program stored on the memory and executable on the processor, and the fresh air device control program, when executed by the processor, implements each step of the control method of the fresh air device according to any one of claims 2-8.

10. A storage medium, characterized by The storage medium stores a fresh air device control program, and the fresh air device control program, when executed by the processor, implements the steps of the control method of the fresh air device according to any one of claims 2-8.

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