Control method of fresh air device, fresh air device and air conditioner

Abstract

The application provides a fresh air device control method, a fresh air device and an air conditioner. The fresh air device control method comprises detecting the concentration of pollutants in an indoor environment in which the fresh air device is located; when the concentration of the pollutants exceeds a preset threshold, detecting the outdoor air quality of an outdoor environment; if the outdoor air quality meets a preset human health index, obtaining window parameters of a window in the indoor environment and wind parameters of outdoor wind; and controlling the fresh air device or the window according to the window parameters, the wind parameters and the air supply amount of the fresh air device, so as to adjust the indoor air quality, avoid a long process of adjusting the indoor air quality and reduce energy loss.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and in particular to a control method for a fresh air device, a fresh air device, and an air conditioner. Background Technology

[0002] As people's living standards improve, they are paying more and more attention to the health of their living environment and are very concerned about the concentration of pollutants in the indoor environment. Specifically, they are concerned about whether formaldehyde levels or PM2.5 levels exceed safe limits. To avoid excessively high concentrations of pollutants indoors, existing solutions include using the fresh air function of air conditioners to reduce pollutant concentrations, or reminding users to open windows when outdoor air quality is relatively good. However, relying solely on the fresh air function of air conditioners to reduce pollutant concentrations can lead to excessive energy consumption and wear on the fresh air system. Similarly, relying solely on reminding users to open windows can result in a prolonged process, both of which negatively impact user experience and cause inconvenience. Summary of the Invention

[0003] In view of the above problems, the present invention is proposed to provide a control method for a fresh air device, a fresh air device, and an air conditioner that overcomes or at least partially solves the above problems.

[0004] One objective of this invention is to control a fresh air device or window based on window parameters, wind parameters, and the air volume supplied by the fresh air device, thereby avoiding an excessively long process of adjusting indoor air quality and reducing energy consumption.

[0005] Another objective of this invention is to reduce the occurrence of localized airflow in the indoor environment while ensuring sufficient air intake through window opening.

[0006] Specifically, the present invention provides a control method for a fresh air device, comprising:

[0007] Detect the concentration of pollutants in the indoor environment where the fresh air system is located;

[0008] When the concentration of the pollutant exceeds a preset threshold, the outdoor air quality of the outdoor environment is detected.

[0009] If the outdoor air quality meets the preset human health indicators, obtain the window parameters of the windows in the indoor environment and the wind parameters of the outdoor wind.

[0010] The fresh air device or the window is controlled according to the window parameters, the wind parameters, and the air supply volume of the fresh air device to regulate the indoor air quality.

[0011] Optionally, controlling the fresh air device or the window based on the window parameters, the wind parameters, and the air supply volume of the fresh air device includes:

[0012] Calculate the amount of air that can enter the indoor environment within a preset time period based on the window parameters and the wind parameters;

[0013] The amount of air intake through the window within the preset time period is compared with the minimum air supply volume of the fresh air device within the preset time period.

[0014] If the amount of air entering through the window within the preset time period is less than the minimum air supply volume of the fresh air device, the fresh air device will be activated.

[0015] Optionally, the window parameters include the number of windows, the opening area, and the plane position of the windows;

[0016] The wind parameters include natural wind speed and natural wind direction;

[0017] When there are two windows, located in different planar positions, the calculation of the air intake volume that can enter the indoor environment within a preset time period based on the window parameters and the wind parameters includes:

[0018] The amount of air that can enter the indoor environment within a preset time when both windows are open is determined based on the natural wind speed, the natural wind direction, and the opening area and planar position of the two windows.

[0019] Optionally, when there are two windows located on the same plane, the step of calculating the air intake volume that can enter the indoor environment within a preset time period based on the window parameters and the wind parameters includes:

[0020] Select the window with the larger opening area from the two windows mentioned above as the target window;

[0021] The amount of air that can enter the indoor environment within a preset time when the target window is open is obtained based on the natural wind speed, the natural wind direction, and the opening area and planar position of the target window.

[0022] Optionally, when there is only one window, the step of calculating the air intake volume that can enter the indoor environment within a preset time period based on the window parameters and the wind parameters includes:

[0023] The amount of air that can enter the indoor environment within a preset time when the window is open is determined based on the natural wind speed, the natural wind direction, the opening area of ​​the window, and its planar position.

[0024] Optionally, if the air intake through the window is greater than or equal to the minimum air supply volume, the presence of people in the indoor environment is detected.

[0025] If so, display a reminder message to open windows for ventilation.

[0026] Optionally, if a window opening command is received in response to the reminder message, the window used to calculate the air intake volume is opened;

[0027] If no window opening command is received in response to the reminder message, the fresh air device will be activated.

[0028] Optionally, if no one is in the indoor environment, the window is opened.

[0029] According to another aspect of the present invention, the present invention also provides a fresh air device, comprising:

[0030] A memory and a processor, wherein the memory stores a control program, which, when executed by the processor, is used to implement the control method of the fresh air device described in any one of the above.

[0031] According to another aspect of the present invention, an air conditioner is also provided, comprising:

[0032] The aforementioned fresh air system.

[0033] In the control method of the fresh air device of the present invention, the concentration of pollutants in the indoor environment where the fresh air device is located is detected; when the concentration of pollutants exceeds a preset threshold, the outdoor air quality of the outdoor environment is detected; if the outdoor air quality meets the preset human health indicators, the window parameters of the indoor environment and the wind parameters of the outdoor wind are obtained; the fresh air device or window is controlled according to the window parameters, wind parameters, and the air supply volume of the fresh air device to adjust the indoor air quality, thereby realizing flexible switching of fresh air device or window control, rather than controlling the fresh air device alone as in the prior art, reducing the loss of electricity and the fresh air device itself, and also reducing the problem of excessively long process of adjusting indoor air quality as in the prior art, improving the intelligence level of the fresh air device, and improving the user experience. The key point of the present invention is to combine parameters such as window parameters, wind parameters, and the air supply volume of the fresh air device as judgment conditions. Those skilled in the art do not have the creativity and cannot obviously think of combining these unrelated parameters. For example, some prior art simply decides whether to open the window based on the outdoor air quality. The present invention breaks through this mental constraint and achieves significant progress.

[0034] Furthermore, when outdoor air quality meets preset human health indicators, directly reducing indoor pollutant concentrations by opening windows can lead to a prolonged process if the amount of air entering the room is too small, potentially harming health. This invention compares the amount of air entering the room through window opening within a preset time period with the minimum airflow of the fresh air system within that same period. If the airflow is less than the minimum airflow, the fresh air system is activated, avoiding the aforementioned problem and improving the user experience. Moreover, this invention compares the airflow through window opening within a preset time period (a set time interval), avoiding excessive switching between opening windows and activating the fresh air system, and extending the lifespan of both the windows and the fresh air system.

[0035] Furthermore, when there are two windows located on the same plane, the distance between them is small. When both windows are open, it is likely that localized airflow will occur within the indoor environment. To avoid this, the window with the larger opening area is selected as the target window. Based on the natural wind speed, natural wind direction, and the target window's opening area and plane position, the air intake volume that can enter the indoor environment within a preset time when the target window is open is calculated. The angle between the natural wind direction and the target window can be obtained based on the target window's plane position. This air intake volume is an estimate and may differ slightly from the actual air intake volume, but it does not affect the solution's ability to address the aforementioned technical problem. Those skilled in the art often lack creativity and believe that opening more windows will quickly reduce the concentration of indoor pollutants, leading to the opening of two windows on the same plane and causing localized airflow within the indoor environment. This invention overcomes this limitation and achieves excellent results.

[0036] The above and other objects, advantages and features of the present invention will become more apparent to those skilled in the art from the following detailed description of specific embodiments of the invention in conjunction with the accompanying drawings. Attached Figure Description

[0037] The following sections will describe some specific embodiments of the invention in detail by way of example and not limitation, with reference to the accompanying drawings. The same reference numerals in the drawings denote the same or similar parts or portions. Those skilled in the art should understand that these drawings are not necessarily drawn to scale. In the drawings:

[0038] Figure 1 This is a flowchart of a control method for a fresh air device according to an embodiment of the present invention;

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

[0040] Figure 3 This is a schematic diagram of a fresh air device according to an embodiment of the present invention;

[0041] Figure 4 This is a schematic diagram of the structure of an air conditioner according to an embodiment of the present invention. Detailed Implementation

[0042] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0043] Figure 1 This is a flowchart of a control method for a fresh air device according to an embodiment of the present invention. A pollutant sensor capable of detecting pollutant concentration is installed in the indoor environment. The fresh air device and the pollutant sensor are communicatively connected, and the fresh air device can acquire the concentration of pollutants detected by the pollutant sensor. The pollutants may be formaldehyde, PM2.5, or carbon monoxide, etc. The control method generally includes the following steps S102 to S108.

[0044] Step S102: Detect the concentration of pollutants in the indoor environment where the fresh air device is located.

[0045] Step S104: When the concentration of pollutants exceeds the preset threshold, detect the outdoor air quality of the outdoor environment.

[0046] In this step, the preset threshold can be set according to actual needs. When the concentration of pollutants exceeds the preset threshold, it can affect human health. An air quality sensor can be installed outdoors, for example, on the outside of a window. The air quality sensor detects outdoor air quality, typically detecting pollutants such as PM2.5 or formaldehyde. Of course, the fresh air system can also be equipped with a network connection module to obtain outdoor air quality data via a network.

[0047] Step S106: If the outdoor air quality meets the preset human health indicators, obtain the window parameters of the indoor environment and the wind parameters of the outdoor wind.

[0048] In this step, the outdoor air quality meets preset human health indicators, meaning the detected concentration of pollutants in the outdoor air will not affect human health. This invention is generally applicable to home rooms and offices, which typically have at least one window. Wind parameters can be obtained through corresponding detectors or via a network. Window parameters can be pre-stored in a designated storage area within the fresh air system, allowing them to be retrieved from that area.

[0049] Step S108: Control the fresh air device or window according to the window parameters, wind parameters and the air supply volume of the fresh air device to regulate the indoor air quality.

[0050] In this embodiment, the concentration of pollutants in the indoor environment where the fresh air device is located is detected; when the concentration of pollutants exceeds a preset threshold, the outdoor air quality is detected; if the outdoor air quality meets preset human health indicators, the window parameters of the indoor environment and the wind parameters of the outdoor wind are obtained; the fresh air device or window is controlled according to the window parameters, wind parameters, and the air supply volume of the fresh air device to adjust the indoor air quality, thereby achieving flexible switching between the control of the fresh air device or window, rather than controlling only the fresh air device in the prior art. This reduces the loss of electricity and the fresh air device itself, and also avoids the problem of excessively long process of adjusting indoor air quality, improving the intelligence level of the fresh air device and enhancing the user experience. The key point of this invention is that it combines parameters such as window parameters, wind parameters, and the air supply volume of the fresh air device as judgment conditions. Those skilled in the art do not have the creativity to obviously think of combining these unrelated parameters. For example, some prior art simply decides whether to open the window based on the outdoor air quality. This invention breaks through this mental constraint and achieves significant progress. If the outdoor air quality does not meet the preset human health indicators, the fresh air system will be activated.

[0051] In one embodiment of the present invention, controlling the fresh air device or window based on window parameters, wind parameters, and the air supply volume of the fresh air device may include:

[0052] Calculate the amount of air that can enter the indoor environment within a preset time period based on window and wind parameters;

[0053] Compare the air intake volume from the window within a preset time period with the minimum air supply volume of the fresh air device within a preset time period;

[0054] If the amount of air entering through the window within the preset time is less than the minimum air supply volume of the fresh air system, the fresh air system will be activated.

[0055] In this embodiment, when the outdoor air quality meets preset human health indicators, directly reducing the concentration of pollutants in the indoor environment by opening windows can lead to a prolonged process of reducing pollutant concentration if the amount of air entering the indoor environment is too small, which is detrimental to human health. This invention compares the amount of air entering the room through window opening within a preset time period with the minimum air supply volume of the fresh air system within the same preset time period. If the amount of air entering the room through window opening within the preset time period is less than the minimum air supply volume of the fresh air system, the fresh air system is activated, avoiding the aforementioned problem and improving the user experience. Furthermore, this invention compares the amount of air entering the room through window opening within a preset time period with the minimum air supply volume of the fresh air system within the same preset time period. The preset time period is a set time interval, which avoids excessively frequent switching between opening windows and activating the fresh air system, and also helps extend the lifespan of the windows and the fresh air system. The preset time period can be any value between 0.5 and 5 hours, such as 1 hour, 2 hours, 3 hours, etc. Of course, you can also compare the air intake from the open window with the preset air supply volume. If it is less than the preset air supply volume, the fresh air system is activated; if it is greater than the preset air supply volume, the window is opened. The preset air supply volume generally needs to be greater than or equal to the minimum air supply volume of the fresh air system.

[0056] In one embodiment of the present invention, window parameters may include the number of windows, the open area, and the plane position of the windows;

[0057] Wind parameters may include natural wind speed and natural wind direction;

[0058] When there are two windows located on different planes, the air intake volume that can enter the indoor environment within a preset time period, calculated based on window parameters and wind parameters, can include:

[0059] The amount of air that can enter the indoor environment within a preset time when both windows are open is determined based on natural wind speed, natural wind direction, and the opening area and planar position of the two windows.

[0060] In this embodiment, the planar position can refer to the location of the indoor wall. Based on the planar position of the window, its orientation can be determined, thus yielding the angle between the natural wind direction and the window. When there are two windows located in different planar positions, a significant pressure difference can be created between them. Based on parameters such as the pressure difference, the angle between the natural wind direction and the window, wind speed, and opening area, the amount of air entering the indoor environment within a preset time when both windows are open can be calculated. This air intake volume is an estimate and may differ slightly from the actual air intake volume, but it does not affect the solution's ability to address the aforementioned technical problem. With two windows located in different planar positions, convection can easily form when both windows are open. Furthermore, the large distance between the two windows prevents localized airflow within the indoor environment, thus reducing or avoiding situations where only the concentration of localized pollutants in the indoor environment is reduced when both windows are open.

[0061] In one embodiment of the present invention, when there are two windows located in the same planar position, calculating the amount of air that can enter the indoor environment within a preset time period based on window parameters and wind parameters may include:

[0062] Choose the window with the larger opening area from the two windows as the target window;

[0063] The amount of air that can enter the indoor environment within a preset time when the target window is open is determined based on the natural wind speed, natural wind direction, and the opening area and planar position of the target window.

[0064] In this embodiment, when there are two windows located on the same plane, the distance between the two windows is small. When both windows are open, it is likely that localized airflow will occur in the indoor environment. To avoid this situation, the window with the larger opening area is selected as the target window. The amount of air that can enter the indoor environment within a preset time when the target window is open is obtained based on the natural wind speed, natural wind direction, the opening area of ​​the target window, and its plane position. The angle between the natural wind direction and the target window can be obtained based on the plane position of the target window. The amount of air that can enter the indoor environment within a preset time when the target window is open can be obtained based on the angle between the natural wind direction and the target window, the natural wind speed, and the opening area of ​​the target window. This airflow can be an estimate and may have some error compared to the actual airflow, but it does not affect the solution to the above-mentioned technical problem. Those skilled in the art often lack creativity and believe that opening more windows will reduce the concentration of indoor pollutants faster, leading to the opening of two windows located on the same plane, causing localized airflow in the indoor environment. This invention breaks through this mental constraint and achieves good results.

[0065] In one embodiment of the present invention, when there is only one window, calculating the amount of air that can enter the indoor environment within a preset time period based on window parameters and wind parameters may include:

[0066] The amount of air that can enter the indoor environment within a preset time when the window is open is determined based on natural wind speed, natural wind direction, and the opening area and plane position of the window.

[0067] In this embodiment, the angle between the natural wind direction and the window can be obtained based on the window's location on the plane. Based on the angle between the natural wind direction and the window, the natural wind speed, and the window's opening area, the amount of air entering the indoor environment within a preset time when the window is open can be calculated. This air intake volume can be an estimate and may differ slightly from the actual air intake volume, but it does not affect the solution's ability to address the aforementioned technical problem.

[0068] In one embodiment of the present invention, if the air intake volume from the open window is greater than or equal to the minimum air supply volume, the presence of people in the indoor environment is detected.

[0069] If so, display a reminder message to open windows for ventilation.

[0070] In this embodiment, if the air intake through the window is greater than or equal to the minimum air supply volume, the system detects whether there are people in the indoor environment. If so, it outputs a reminder message to open the window for ventilation, allowing the user to decide whether to open the window, rather than opening the window automatically. This fully respects the user's ideas and is more user-friendly.

[0071] In one embodiment of the present invention, if a window opening command in response to a reminder message is received, the window involved in calculating the air intake volume is opened;

[0072] If no window opening command is received in response to the reminder message, the fresh air system will be activated.

[0073] In this embodiment, even if the air intake from the open window is greater than or equal to the minimum air supply volume, opening the window can reduce or avoid situations where ventilation takes a long time. However, users may not want to open the window for various reasons (such as resting, studying, or being sick). In order to fully consider the user's wishes and avoid blindly opening the window, if a window opening command in response to the reminder message is received, the window participating in the calculation of the air intake volume is opened. If no window opening command in response to the reminder message is received, the fresh air device is activated, which is very intelligent.

[0074] In one embodiment of the present invention, if there is no one in the indoor environment, the window is opened.

[0075] In this embodiment, if no one is in the indoor environment, there is no need to consider the user's wishes to open the window. This reduces the concentration of pollutants in the indoor environment and avoids the need for prolonged ventilation. The fresh air fan can be connected to the window signal to control the rotation of gears, thereby opening and closing the window.

[0076] Figure 2 This is a flowchart of a control method for an air conditioner according to another embodiment of the present invention. See also... Figure 2 The control method may include the following steps S202 to S222.

[0077] Step S202: Detect the concentration of pollutants in the indoor environment where the fresh air device is located.

[0078] Step S204: When the concentration of pollutants exceeds the preset threshold, detect the outdoor air quality of the outdoor environment.

[0079] Step S206: If the outdoor air quality meets the preset human health indicators, obtain the window parameters of the indoor environment and the wind parameters of the outdoor wind.

[0080] Step S208: Calculate the amount of air that can enter the indoor environment within a preset time period based on the window parameters and wind parameters.

[0081] Step S210: Compare whether the air intake volume of the window within the preset time period is less than the minimum air supply volume of the fresh air device within the preset time period.

[0082] If yes, proceed to step S212; otherwise, proceed to step S214.

[0083] Step S212: Start the fresh air system.

[0084] Step S214: Detect whether there are people in the indoor environment.

[0085] If yes, proceed to step S216; otherwise, proceed to step S222.

[0086] Step S216: Output a reminder message to open windows for ventilation.

[0087] Step S218: If a window opening command is received in response to the reminder message, open the window involved in calculating the air intake volume.

[0088] Step S220: If no window opening command is received in response to the reminder message, start the fresh air device.

[0089] Step S222: Open the window.

[0090] Figure 3 This is a schematic diagram of the structure of a fresh air device 300 according to an embodiment of the present invention. See also... Figure 3Based on the same concept, the present invention also provides a fresh air device 300. The fresh air device 300 includes a memory 301 and a processor 302. The memory 301 stores a control program, which, when executed by the processor 302, is used to implement the control method of the fresh air device 300 in any of the above embodiments.

[0091] Figure 4 This is a schematic diagram of the structure of an air conditioner 400 according to an embodiment of the present invention. See also... Figure 4 Based on the same concept, the present invention also provides an air conditioner 400. The air conditioner 400 includes the fresh air device 300 of the above embodiment.

[0092] The above embodiments can be combined arbitrarily. Based on any one preferred embodiment or a combination of multiple preferred embodiments, the embodiments of the present invention can achieve the following beneficial effects:

[0093] In the control method of the fresh air device of the present invention, the concentration of pollutants in the indoor environment where the fresh air device is located is detected; when the concentration of pollutants exceeds a preset threshold, the outdoor air quality of the outdoor environment is detected; if the outdoor air quality meets the preset human health indicators, the window parameters of the indoor environment and the wind parameters of the outdoor wind are obtained; the fresh air device or window is controlled according to the window parameters, wind parameters, and the air supply volume of the fresh air device to adjust the indoor air quality, thereby realizing flexible switching of fresh air device or window control, rather than controlling the fresh air device alone as in the prior art, reducing the loss of electricity and the fresh air device itself, and also reducing the problem of excessively long process of adjusting indoor air quality as in the prior art, improving the intelligence level of the fresh air device, and improving the user experience. The key point of the present invention is to combine parameters such as window parameters, wind parameters, and the air supply volume of the fresh air device as judgment conditions. Those skilled in the art do not have the creativity and cannot obviously think of combining these unrelated parameters. For example, some prior art simply decides whether to open the window based on the outdoor air quality. The present invention breaks through this mental constraint and achieves significant progress.

[0094] Therefore, those skilled in the art should recognize that although numerous exemplary embodiments of the present invention have been shown and described in detail herein, many other variations or modifications conforming to the principles of the present invention can be directly determined or derived from the disclosure of the present invention without departing from the spirit and scope of the invention. Thus, the scope of the present invention should be understood and construed as covering all such other variations or modifications.

Claims

1. A method for controlling a fresh air device, comprising: Detect the concentration of pollutants in the indoor environment where the fresh air system is located; When the concentration of the pollutant exceeds a preset threshold, the outdoor air quality of the outdoor environment is detected. If the outdoor air quality meets the preset human health indicators, obtain the window parameters of the windows in the indoor environment and the wind parameters of the outdoor wind. The window parameters include the number of windows, the opening area, and the plane position of the windows. The fresh air device or the window is controlled according to the window parameters, the wind parameters, and the air supply volume of the fresh air device to regulate the indoor air quality; The step of controlling the fresh air device or the window based on the window parameters, the wind parameters, and the air supply volume of the fresh air device includes: Calculate the amount of air that can enter the indoor environment within a preset time period based on the window parameters and the wind parameters; compare the amount of air that can enter the indoor environment within the preset time period with the minimum air supply volume of the fresh air device within the preset time period; if the amount of air that can enter the indoor environment within the preset time period is less than the minimum air supply volume of the fresh air device, start the fresh air device. When there are two windows located on the same plane, the calculation of the air intake volume that can enter the indoor environment within a preset time period based on the window parameters and the wind parameters includes: Select the window with the larger opening area from the two windows as the target window, and calculate the air intake volume that can enter the indoor environment within a preset time when the target window is open.

2. The control method according to claim 1, wherein, The wind parameters include natural wind speed and natural wind direction.

3. The control method according to claim 1, wherein, If the air intake volume from the open window is greater than or equal to the minimum air supply volume, detect whether there are people in the indoor environment; If so, display a reminder message to open windows for ventilation.

4. The control method according to claim 3, wherein, If a window opening command is received in response to the reminder message, the window used to calculate the air intake volume is opened; If no window opening command is received in response to the reminder message, the fresh air device will be activated.

5. The control method according to claim 3, wherein, If no one is in the indoor environment, open the window.

6. A fresh air system, comprising: A memory and a processor, wherein the memory stores a control program, which, when executed by the processor, is used to implement the control method of the fresh air device according to any one of claims 1 to 5.

7. An air conditioner, comprising: The fresh air device according to claim 6.

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