CN113669881B - Method, device and intelligent fresh air blower for controlling fresh air blower - Google Patents

Abstract

The application relates to the technical field of intelligent household appliances and discloses a method for controlling a fresh air machine. The method for controlling fresh air comprises the following steps: obtaining an indoor pollution index and an outdoor pollution index; obtaining a first set rotating speed of an air inlet fan positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index and a second set rotating speed of an air exhaust fan negatively correlated with the indoor pollution index and negatively correlated with the outdoor pollution index; the influence of the indoor pollution index on the first set rotating speed is greater than the influence of the outdoor pollution index on the first set rotating speed, and the influence of the indoor pollution index on the second set rotating speed is less than the influence of the outdoor pollution index on the second set rotating speed; controlling the air intake fan according to a first set rotating speed, and controlling the air exhaust fan according to a second set rotating speed. By adopting the method for controlling the fresh air machine, the energy consumption and the air exchange speed of the fresh air machine can be balanced. The application also discloses a new fan of device and intelligence for controlling new fan.

Description

Method, device and intelligent fresh air blower for controlling fresh air blower

technical field

The present application relates to the technical field of smart home appliances, for example, to a method and device for controlling a fresh air fan, and a smart fresh air fan.

Background technique

At present, the fresh air fan has the function of exchanging indoor and outdoor air. It adopts the design of the air intake duct and the exhaust duct. Indoor, and the air inlet duct filters and purifies the air entering the room. Normally, the ratio of intake air to exhaust air is fixed.

In order to reduce energy consumption, when the indoor air quality is worse than the outdoor air quality, the air intake and exhaust ratio can be set so that the exhaust air volume of the indoor air is greater than the intake air volume of the fresh air, so that the indoor air pressure is in a slightly negative pressure state; In the case of poor air quality, set the air intake and exhaust ratio so that the exhaust air volume of the indoor air is less than the intake air volume of the fresh air, so that the indoor air pressure is in a slightly positive pressure state; and after detecting the indoor air quality and outdoor air quality, calculate the air quality difference, The absolute value of the difference is proportional to the difference between the set exhaust air volume and fresh air intake volume.

In the process of implementing the embodiments of the present disclosure, it is found that at least the following problems exist in related technologies:

Although the prior art can ensure positive or negative pressure in the room, it has poor ability to adjust the ventilation rate of the room air.

Contents of the invention

In order to provide a basic understanding of some aspects of the disclosed embodiments, a brief summary is presented below. The summary is not intended to be an extensive overview nor to identify key/important elements or to delineate the scope of these embodiments, but rather serves as a prelude to the detailed description that follows.

Embodiments of the present disclosure provide a method and device for controlling a fresh air fan, and an intelligent fresh air fan, so as to solve the technical problem in the prior art that the ability to adjust the ventilation speed of indoor air is poor.

In some embodiments, the method for controlling a fresh air fan includes: obtaining an indoor pollution index and an outdoor pollution index; obtaining a first setting of an air inlet fan that is positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index fixed speed, and the second set speed of the exhaust fan that is negatively correlated with the indoor pollution index and negatively correlated with the outdoor pollution index; wherein, the influence of the indoor pollution index on the first set speed is greater than The influence of the outdoor pollution index on the first set speed, the influence of the indoor pollution index on the second set speed is smaller than the influence of the outdoor pollution index on the second set speed; according to the The air intake fan is controlled according to the first set speed, and the exhaust fan is controlled according to the second set speed.

Optionally, a first set speed that is positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index, and a second set speed that is negatively correlated with the indoor pollution index and negatively correlated with the outdoor pollution index is obtained. Setting the rotation speed includes: obtaining the first product of the indoor pollution index and the first coefficient, and the second product of the outdoor pollution index and the second coefficient, and obtaining the first product of the first product and the second product of the second product One and, determined as the first set speed, wherein the first coefficient is greater than the second coefficient; obtain the third product of the indoor pollution index and the third coefficient, and the outdoor pollution index and the first A fourth product of four coefficients determines the reciprocal of the third product and a second sum of the fourth product as the second set rotational speed, wherein the fourth coefficient is greater than the third coefficient.

Optionally, before obtaining the first set speed and the second set speed, the method for controlling the fresh air fan further includes: obtaining a positive correlation with the indoor pollution index and a positive correlation with the outdoor pollution index Positively correlated with the ratio of the first set speed to the second set speed.

Optionally, controlling the intake fan according to the first set speed, and controlling the exhaust fan according to the second set speed includes: when the indoor pollution index is less than or equal to the first set pollution index, and when the outdoor pollution index is less than or equal to the second set pollution index, the current pressure difference between the current indoor pressure and the current outdoor pressure is obtained; according to the preset pressure difference and the current pressure difference control The air intake fan and the exhaust fan make the absolute value of the current pressure difference reach the preset pressure difference.

Optionally, controlling the air intake fan and the exhaust fan according to a preset pressure difference and the current pressure difference includes: the current indoor pressure is greater than the current outdoor pressure, and the current pressure When the absolute value of the difference is less than the preset pressure, increase the speed of the intake fan; if the absolute value of the current pressure difference does not reach the preset pressure difference within the first set time period , then reduce the speed of the exhaust fan; when the current indoor pressure is less than the current outdoor pressure, and the absolute value of the current pressure difference is less than the preset pressure, increase the speed of the exhaust fan If the absolute value of the current pressure difference does not reach the preset pressure difference within the first set time period, then reduce the speed of the intake fan.

Optionally, the determination that the current pressure difference reaches the preset pressure difference includes: in the case of increasing the absolute value of the current pressure difference, if the absolute value of the current pressure difference is greater than or If the duration equal to the preset pressure difference is greater than or equal to a second set duration, it is determined that the absolute value of the current pressure difference reaches the preset pressure difference;

In the case of reducing the absolute value of the current pressure difference, if the absolute value of the current pressure difference is less than or equal to the duration of the preset pressure difference is greater than or equal to the second set time length, then determine the The absolute value of the current pressure difference reaches the preset pressure difference.

Optionally, in the case that the indoor pollution index is less than a third set pollution index, a first set rotation speed that is positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index is obtained, and is related to the The second set speed that is negatively correlated with the indoor pollution index and negatively correlated with the outdoor pollution index;

When the indoor pollution index is greater than or equal to the third set pollution index, the first set speed is determined as the maximum speed of the intake fan, and the second set speed is determined as the maximum speed of the air intake fan. The maximum speed of the exhaust fan.

In some embodiments, the device for controlling fresh air blower includes a first obtaining module, a second obtaining module and a control module, wherein the first obtaining module is configured to obtain indoor pollution index and outdoor pollution index; the second obtaining module The second obtaining module is configured to obtain a first set speed that is positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index, and a first set speed that is negatively correlated with the indoor pollution index and negatively correlated with the outdoor pollution index A second set speed; the control module is configured to control the intake fan according to the first set speed, and control the exhaust fan according to the second set speed.

The method, device, and intelligent fresh air fan provided by the embodiments of the present disclosure can achieve the following technical effects:

When the indoor pollution index and outdoor pollution index are both low, the first setting speed of the air intake fan is relatively small, and the second setting speed of the exhaust fan is relatively high, which can maintain negative pressure indoors and allow outdoor air to pass through. The room gap enters the room, which can reduce the energy consumption of the fresh fan; when the indoor pollution index and outdoor pollution index are both high, the first set speed of the air intake fan is higher, and the second set speed of the exhaust fan is lower. It can maintain a high positive pressure in the room. On the one hand, it can allow more purified air to enter the room. On the other hand, it can also reduce the air entering the room from the outside through the room gap, and finally quickly reduce the indoor pollution index; Indoor pollution When the index is small and the outdoor pollution index is large, the influence of the indoor pollution index on the first set speed is greater than that of the outdoor pollution index on the first set speed, so the first set speed is small, while the indoor pollution The influence of the index on the second set speed is smaller than that of the outdoor pollution index on the second set speed, so the second set speed will be smaller, which can reduce the air exchange speed of the fresh air machine and reduce the energy consumption of the fresh air machine; The pollution index is large and the outdoor pollution index is small. The influence of the indoor pollution index on the first set speed is greater than that of the outdoor pollution index on the first set speed, so the first set speed is larger, while the indoor pollution index has a greater impact on the second set speed. The influence of the fixed speed is less than the influence of the outdoor pollution index on the second set speed, so the second set speed will be larger, which can increase the air exchange speed of the fresh fan and improve the speed of purifying indoor air. In this way, the technical solution can adjust the ventilation speed of the indoor air according to the indoor pollution index and the outdoor pollution index, so as to balance the energy consumption and the ventilation speed of the fresh air machine.

The foregoing general description and the following description are exemplary and explanatory only and are not intended to limit the application.

Description of drawings

One or more embodiments are exemplified by corresponding drawings, and these exemplifications and drawings do not constitute limitations to the embodiments, and elements with the same reference numerals in the drawings are regarded as similar elements, and where:

Fig. 1 is a schematic diagram of a method for controlling a new fan provided by an embodiment of the present disclosure;

Fig. 2 is a schematic diagram of a device for controlling a new fan provided by an embodiment of the present disclosure;

Fig. 3 is a schematic diagram of a device for controlling a fresh air fan provided by an embodiment of the present disclosure.

Detailed ways

In order to understand the characteristics and technical content of the embodiments of the present disclosure in more detail, the implementation of the embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings. The attached drawings are only for reference and description, and are not intended to limit the embodiments of the present disclosure. In the following technical description, for purposes of explanation, numerous details are set forth in order to provide a thorough understanding of the disclosed embodiments. However, one or more embodiments may be practiced without these details. In other instances, well-known structures and devices may be shown simplified in order to simplify the drawings.

The terms "first", "second" and the like in the description and claims of the embodiments of the present disclosure and the above drawings are used to distinguish similar objects, and are not necessarily used to describe a specific sequence or sequence. It should be understood that the data so used may be interchanged under appropriate circumstances so as to facilitate the embodiments of the disclosed embodiments described herein. Furthermore, the terms "comprising" and "having", as well as any variations thereof, are intended to cover a non-exclusive inclusion.

Unless stated otherwise, the term "plurality" means two or more.

In the embodiments of the present disclosure, the character "/" indicates that the preceding and following objects are an "or" relationship. For example, A/B means: A or B.

The term "and/or" is an associative relationship describing objects, indicating that there can be three relationships. For example, A and/or B means: A or B, or, A and B, these three relationships.

Fig. 1 is a schematic diagram of a method for controlling a fresh air machine provided by an embodiment of the present disclosure. The method for controlling the fresh air may be executed by a controller of the fresh air machine, or may be executed by a controller of other household electrical appliances having a fresh air function, for example, by a controller of a fresh air conditioner.

As shown in Figure 1, the method for controlling the fresh air machine includes:

S101. Obtain an indoor pollution index and an outdoor pollution index.

The pollution index here may be the concentration of carbon dioxide, or it may be the concentration of fine particulate matter (Fine Particulate Matter, PM2.5). The indoor pollution index is of the same type as the outdoor pollution index: when the indoor pollution index is the indoor carbon dioxide concentration, the outdoor pollution index is the outdoor carbon dioxide concentration; when the indoor pollution index is the indoor PM2.5 concentration, the outdoor pollution index is the outdoor PM2.5 concentration.

The indoor pollution index can be obtained through corresponding sensor detection, such as a carbon dioxide concentration sensor or a PM2.5 concentration sensor, and the sensor can be set at any position in the room, or it can be set at the return air outlet of the fresh fan.

The outdoor pollution index can be obtained through the network, or obtained through the detection of a corresponding sensor installed at the air inlet (fresh air outlet) of the fresh fan, such as a carbon dioxide concentration sensor or a PM2.5 concentration sensor.

The types of pollution indices listed in the embodiments of the present disclosure are only illustrative, and do not constitute specific limitations on the types of pollution indices. Those skilled in the art can select appropriate types of pollution indices according to actual application scenarios.

S102. Obtain the first set speed of the intake fan that is positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index, and the second set speed of the exhaust fan that is negatively correlated with the indoor pollution index and negatively correlated with the outdoor pollution index Rotating speed.

Wherein, the influence of the indoor pollution index on the first set speed is greater than that of the outdoor pollution index on the first set speed, and the influence of the indoor pollution index on the second set speed is smaller than that of the outdoor pollution index on the second set speed.

The influence of the indoor pollution index on the first set speed is greater than that of the outdoor pollution index on the first set speed means: the increase value of the first set speed corresponding to the concentration of the indoor pollution index increase unit is greater than the outdoor pollution index increase unit The increase value of the first set speed corresponding to the concentration. The influence of the indoor pollution index on the second set speed is less than that of the outdoor pollution index on the second set speed means: the increase value of the second set speed corresponding to the indoor pollution index reduction unit concentration is greater than the outdoor concentration reduction unit concentration The corresponding increase value of the second set speed.

Optionally, before obtaining the first set speed and the second set speed, the method for controlling the fresh air fan further includes: obtaining the first set speed that is positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index The ratio to the second set speed.

When the ratio of the first set speed to the second set speed is greater than 1, the current indoor pressure can be higher than the current outdoor pressure, and at this time the ratio of the first set speed to the second set speed is greater, The greater the current pressure difference between the current indoor pressure and the current outdoor pressure; when the ratio of the first set speed to the second set speed is greater than 1, the current indoor pressure can be lower than the current outdoor pressure, and at this time the first The smaller the ratio of the first set speed to the second set speed, the greater the current pressure difference between the current outdoor pressure and the current indoor pressure. That is, the larger the ratio of the first set speed to the second set speed, the easier it is to maintain a high pressure in the room; the smaller the ratio of the first set speed to the second set speed, the easier it is to maintain a low pressure in the room.

In some application scenarios, the indoor pollution index is the indoor PM2.5 concentration, the outdoor pollution index is the outdoor PM2.5 concentration, the indoor PM2.5 concentration is less than or equal to 35 μg/m ³ , and the outdoor PM2.5 concentration is less than or equal to 50 μg /m ³ , the ratio of the first set speed to the second set speed is determined to be 1:2; the indoor PM2.5 concentration is greater than 35 μg/m ³ and less than or equal to 50 μg/m ³ , and the outdoor PM2.5 When the concentration is greater than 50 μg/m ³ and less than or equal to 100 μg/m ³ , the ratio of the first set speed to the second set speed is determined to be 1:1; the indoor PM2.5 concentration is greater than 50 μg/m ³ , and the outdoor When the PM2.5 concentration is greater than 50 μg/ ^m3 and less than or equal to 100 μg/ ^m3 , the ratio of the first set speed to the second set speed is determined to be 2:1; the indoor PM2.5 concentration is greater than 50 μg/m3 , when the outdoor PM2.5 concentration is greater than 100 μg/m ³ and less than or equal to 150 μg/m ³ , the ratio of the first set speed to the second set speed is determined to be 3:1.

Further, the first set speed that is positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index, and the second set speed that is negatively correlated with the indoor pollution index and negatively correlated with the outdoor pollution index can be obtained by: The first product of the indoor pollution index and the first coefficient, and the second product of the outdoor pollution index and the second coefficient, the first sum of the first product and the second product is determined as the first set speed; the indoor pollution index is obtained and the third product of the third coefficient, and the fourth product of the outdoor pollution index and the fourth coefficient, the reciprocal of the second sum of the third product and the fourth product is determined as the second set speed; wherein, the first coefficient is greater than the second coefficient, and the fourth coefficient is greater than the third coefficient.

In this way, the accurate first set speed and the second set speed can be obtained.

The specific values of the first coefficient, the second coefficient, the third coefficient and the fourth coefficient are all related to the types of indoor pollution index and outdoor pollution index. For example, the application scenario where the indoor pollution index is the indoor carbon dioxide concentration and the outdoor pollution index is the outdoor carbon dioxide concentration , are different from the specific values of the first coefficient, the second coefficient, the third coefficient and the fourth coefficient in the application scenario where the indoor pollution index is the indoor PM2.5 concentration and the outdoor pollution index is the outdoor PM2.5 concentration.

The larger the first coefficient or the smaller the second coefficient, the more beneficial it is to increase the speed of purifying indoor air, but at the same time it will shorten the life of the filter device in the fresh air fan; the smaller the third coefficient or the larger the fourth coefficient, the more The more beneficial it is to prolong the life of the fresh air filter device, but at the same time it will make the speed of purifying the indoor air slower. Therefore, those skilled in the art can determine according to the service life of the filter device in the fresh fan and the speed of purifying the indoor air. Appropriate first, second, third and fourth coefficients.

When the type of the pollution index is other than the carbon dioxide concentration and the PM2.5 concentration, those skilled in the art may select the corresponding first coefficient, second coefficient, third coefficient and fourth coefficient.

In addition, in the case that the outdoor pollution index is greater than the maximum outdoor pollution index, it is determined that the second set rotation speed approaches zero. Here, the outdoor pollution index is used as an example to illustrate the outdoor PM2.5 concentration. When the outdoor PM2.5 concentration is greater than the maximum set outdoor PM2.5 concentration, it is determined that the second set speed is close to zero. The maximum set speed here is The fixed outdoor PM2.5 concentration can be 90μg/m ³ , 100μg/m ³ or 110μg/m ³ , which can ensure sufficient positive pressure indoors and reduce the penetration of outdoor pollutants.

Optionally, when the indoor pollution index is less than the third set pollution index, the first set speed that is positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index, and negatively correlated with the indoor pollution index and outdoor is obtained. The second set speed that is negatively correlated with the pollution index; when the indoor pollution index is greater than or equal to the third set pollution index, the first set speed is determined as the maximum speed of the intake fan, and the second set speed is determined as is the maximum speed of the exhaust fan.

The third set pollution index here refers to the pollution index that makes the user uncomfortable or easy to cause damage to the user's body. Here, the concentration of PM2.5 is used as an example for illustration. For example, the third set pollution index can be 120μg/ m ³ , 125 μg/m ³ or 130 μg/m ³ . When the indoor pollution index is greater than or equal to the third set pollution index, no matter the outdoor pollution index is high or low, the indoor pollution index must be quickly reduced. The purified air is sent into the room, and the exhaust fan runs at the maximum speed, which is convenient to quickly discharge the air with high indoor pollution index to the outside, which can quickly reduce the indoor pollution index.

S103. Control the intake fan according to the first set speed, and control the exhaust fan according to the second set speed.

For example, the speed of the air intake fan is adjusted to a first set speed, and the speed of the exhaust fan is adjusted to a second set speed.

When the indoor pollution index and outdoor pollution index are both low, the first setting speed of the air intake fan is relatively small, and the second setting speed of the exhaust fan is relatively high, which can maintain negative pressure indoors and allow outdoor air to pass through. The room gap enters the room, which can reduce the energy consumption of the fresh fan; when the indoor pollution index and outdoor pollution index are both high, the first set speed of the air intake fan is higher, and the second set speed of the exhaust fan is lower. It can maintain a high positive pressure in the room. On the one hand, it can allow more purified air to enter the room. On the other hand, it can also reduce the air entering the room from the outside through the room gap, and finally quickly reduce the indoor pollution index; Indoor pollution When the index is small and the outdoor pollution index is large, the influence of the indoor pollution index on the first set speed is greater than that of the outdoor pollution index on the first set speed, so the first set speed is small, while the indoor pollution The influence of the index on the second set speed is smaller than that of the outdoor pollution index on the second set speed, so the second set speed will be smaller, which can reduce the air exchange speed of the fresh air machine and reduce the energy consumption of the fresh air machine; The pollution index is large and the outdoor pollution index is small. The influence of the indoor pollution index on the first set speed is greater than that of the outdoor pollution index on the first set speed, so the first set speed is larger, while the indoor pollution index has a greater impact on the second set speed. The influence of the fixed speed is less than the influence of the outdoor pollution index on the second set speed, so the second set speed will be larger, which can increase the air exchange speed of the fresh fan and improve the speed of purifying indoor air. In this way, the technical solution can adjust the ventilation speed of the indoor air according to the indoor pollution index and the outdoor pollution index, so as to balance the energy consumption and the ventilation speed of the fresh air machine.

"Higher", "lower", "larger" and "smaller" in the embodiments of the present disclosure are relative to other values of this parameter, for example, a lower indoor pollution index means There are other indoor pollution indexes higher than the one indoor pollution index; a higher indoor pollution index means that there are other indoor pollution indexes lower than the one indoor pollution index; a higher first set speed means that What is meant is that there are other first set speeds that are smaller than the one first set speed; one first set speed is lower, which means that there are other first set speeds that are greater than the one first set speed. Here, the "higher", "lower", "larger" and "smaller" in the embodiments of the present disclosure are exemplified by taking the indoor pollution index as higher and lower, and the first set speed as larger and smaller. , other parameters "higher", "lower", "larger" and "smaller" can be understood according to this exemplary description, and will not be repeated here.

Optionally, when the indoor pollution index is greater than the first set pollution index, or the outdoor pollution index is greater than the second set pollution index, the air intake positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index is obtained. The first set speed of the fan, and the second set speed of the exhaust fan which is negatively correlated with the indoor pollution index and negatively correlated with the outdoor pollution index, and the intake fan is controlled according to the first set speed, according to the second set The speed controls the exhaust fan; when the indoor pollution index is less than or equal to the first set pollution index, and the outdoor pollution index is less than the second set pollution index, the current pressure difference between the current indoor pressure and the current outdoor pressure is obtained, The air inlet fan and the exhaust fan are controlled according to the preset pressure difference and the current pressure difference, so that the absolute value of the current pressure difference reaches the preset pressure difference.

Wherein, the first set pollution index refers to the pollution index that is harmless to the human body, and the second set pollution index refers to the pollution index that is harmless to the human body. For example, the first set pollution index can be 10 μg/m ³ , 15μg/m ³ , 20μg/m ³ , 25μg/m ³ , 30μg/m ³ or 35μg/m ³ , the second set pollution index can be 10μg/m ³ , 15μg/m ³ , 20μg/m ³ , 25μg /m ³ , 30 μg/m ³ or 35 μg/m ³ .

In the case that the indoor pollution index is less than or equal to the first set pollution index, and the outdoor pollution index is less than or equal to the second set pollution index, at this time, it is necessary to strictly control the air intake fan and exhaust fan to change the air. In this case, users are usually accustomed to breathing outside air, or breathing indoor air. At this time, continuing to maintain outdoor negative pressure is not conducive to user experience. At this time, the current indoor pressure and the current outdoor By controlling the current pressure difference of the pressure, the user can directly breathe the outdoor air or the filtered air, which is beneficial to improve the user experience.

In some application scenarios, the preset pressure difference can be determined by the following methods: first obtain the current season, for example, obtain the current season through the network, or determine the current season by detecting the indoor and outdoor temperature difference, when the indoor and outdoor temperature difference is less than or When the temperature is equal to the set temperature, it is determined as the spring and autumn season, and when the indoor and outdoor temperature difference is greater than the set temperature, it is determined as the summer and winter season. The set temperature can be 3°C, 5°C or 7°C; The preset pressure difference corresponding to the current season, for example, the preset pressure difference corresponding to spring and autumn is -20Pa, -30Pa or -40Pa, and the preset pressure difference of -20Pa means that the indoor pressure is lower than the outdoor pressure 20Pa, the preset pressure difference of -30Pa means that the indoor pressure is 30Pa lower than the outdoor pressure, and the preset pressure difference of -40Pa means that the indoor pressure is 40Pa lower than the outdoor pressure; the preset pressure difference in summer and winter is 20Pa, 30Pa or 40Pa. In this way, on the basis of energy saving of the fresh air blower, users can easily breathe outdoor air directly in spring and autumn, and can breathe filtered outdoor air in summer and winter, which improves the user experience.

Controlling the air inlet fan and the exhaust fan according to the preset pressure difference and the current pressure difference may include: when the current indoor pressure is higher than the current outdoor pressure, and the absolute value of the current pressure difference is smaller than the preset pressure, increasing the intake fan The speed of the fan, if the absolute value of the current pressure difference does not reach the preset pressure difference within the first set time, reduce the speed of the exhaust fan; the current indoor pressure is less than the current outdoor pressure, and the current pressure difference When the absolute value of is less than the preset pressure, the speed of the exhaust fan is increased, and if the absolute value of the current pressure difference does not reach the preset pressure difference within the first set time, the speed of the intake fan is reduced.

In this way, the current pressure difference can reach the preset pressure difference quickly.

Optionally, the determination that the current pressure difference reaches the preset pressure difference includes: in the case of increasing the absolute value of the current pressure difference, if the absolute value of the current pressure difference is greater than or equal to the duration of the preset pressure difference If the duration is greater than or equal to the second set duration, it is determined that the absolute value of the current pressure difference reaches the preset pressure difference; in the case of reducing the absolute value of the current pressure difference, if the absolute value of the current pressure difference is less than or equal to If the duration of the preset pressure difference is greater than or equal to the second set duration, it is determined that the absolute value of the current pressure difference reaches the preset pressure difference. Wherein, the second set duration is shorter than the first set duration, the greater the power of the fresh air blower, and/or the smaller the volume of the room, the smaller the difference between the first set duration and the second set duration.

This facilitates maintaining the current pressure difference at the preset pressure difference.

In addition, if the current pressure difference does not reach the preset pressure difference within the third set period of time after reducing the speed of the exhaust fan or the speed of the intake fan, it prompts to replace the filter. Make Xinfeng more intelligent. The third set duration here may be 5 min, 6 min, 7 min, 8 min, 9 min or 10 min.

Fig. 2 is a schematic diagram of a device for controlling a fresh air fan provided by an embodiment of the present disclosure. The device for controlling the fresh air fan is implemented in software, hardware or a combination of the two.

As shown in FIG. 2, the device for controlling the fresh air machine includes a first obtaining module 21, a second obtaining module 22 and a control module 23;

The first obtaining module 21 is configured to obtain the indoor pollution index and the outdoor pollution index;

The second obtaining module 22 is configured to obtain a first set rotational speed that is positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index, and a second set rotational speed that is negatively correlated with the indoor pollution index and negatively correlated with the outdoor pollution index; Wherein, the influence of the indoor pollution index on the first set speed is greater than the influence of the outdoor pollution index on the first set speed, and the influence of the indoor pollution index on the second set speed is smaller than the influence of the outdoor pollution index on the second set speed;

The control module 23 is configured to control the intake fan according to the first set speed, and control the exhaust fan according to the second set speed.

Optionally, the second obtaining module includes a first obtaining unit, a second obtaining unit and a control unit, wherein the first obtaining unit is configured to obtain the first product of the indoor pollution index and the first coefficient, and the outdoor pollution index and the first coefficient The second product of the two coefficients determines the first sum of the first product and the second product as the first set speed, wherein the first coefficient is greater than the second coefficient; the second obtaining unit is configured to obtain the indoor pollution index and The third product of the third coefficient, and the fourth product of the outdoor pollution index and the fourth coefficient; the determination unit is configured to determine the reciprocal of the second sum of the third product and the fourth product as the second set speed, wherein , the fourth coefficient is greater than the third coefficient.

Optionally, the device for controlling the fresh air fan further includes a third obtaining module, the third obtaining module is configured to obtain a positive correlation with the indoor pollution index before obtaining the first set speed and the second set speed, and is related to The ratio of the first set speed to the second set speed that is positively correlated with the outdoor pollution index.

Optionally, the control module includes a third obtaining unit and a control unit, the third obtaining unit is configured such that the indoor pollution index is less than or equal to the first set pollution index, and the outdoor pollution index is less than or equal to the second set pollution index In this case, the current pressure difference between the current indoor pressure and the current outdoor pressure is obtained; the control unit is configured to control the intake fan and the exhaust fan according to the preset pressure difference and the current pressure difference, so that the absolute value of the current pressure difference A preset differential pressure is reached.

Optionally, the control unit is specifically configured to:

When the current indoor pressure is greater than the current outdoor pressure, and the absolute value of the current pressure difference is less than the preset pressure, increase the speed of the intake fan; if the absolute value of the current pressure difference does not reach the preset value within the first set time If the pressure difference is set, the speed of the exhaust fan will be reduced;

When the current indoor pressure is less than the current outdoor pressure, and the absolute value of the current pressure difference is less than the preset pressure, increase the speed of the exhaust fan; if the absolute value of the current pressure difference does not reach the preset value within the first set time If the pressure difference is set, the speed of the inlet fan will be reduced.

Optionally, the determination that the current pressure difference reaches the preset pressure difference includes: in the case of increasing the absolute value of the current pressure difference, if the absolute value of the current pressure difference is greater than or equal to the duration of the preset pressure difference If the duration is greater than or equal to the second set duration, it is determined that the absolute value of the current pressure difference reaches the preset pressure difference;

In the case of reducing the absolute value of the current pressure difference, if the absolute value of the current pressure difference is less than or equal to the duration of the preset pressure difference and greater than or equal to the second set time length, then determine the absolute value of the current pressure difference A preset differential pressure is reached.

Optionally, the second obtaining module is specifically configured to: obtain the first set rotational speed that is positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index when the indoor pollution index is less than the third set pollution index, and The second set speed that is negatively correlated with the indoor pollution index and negatively correlated with the outdoor pollution index; when the indoor pollution index is greater than or equal to the third set pollution index, the first set speed is determined as the maximum speed of the intake fan Rotating speed, the second set rotating speed is determined as the maximum rotating speed of the exhaust fan.

In some embodiments, the device for controlling a fresh air blower includes a processor and a memory storing program instructions, and the processor is configured to execute the method for controlling a fresh air blower provided in the foregoing embodiments when executing the program instructions.

Fig. 3 is a schematic diagram of a device for controlling a fresh air fan provided by an embodiment of the present disclosure. As shown in Figure 3, the device used to control the fresh air fan includes:

A processor (processor) 31 and a memory (memory) 32 may also include a communication interface (Communication Interface) 33 and a bus 34 . Among them, the processor 31 , the communication interface 33 , and the memory 32 can communicate with each other through the bus 34 . The communication interface 33 can be used for information transmission. The processor 31 can call the logic instructions in the memory 32 to execute the method for controlling the fresh air fan provided in the foregoing embodiments.

In addition, the above-mentioned logic instructions in the memory 32 can be implemented in the form of software function units and can be stored in a computer-readable storage medium when sold or used as an independent product.

The memory 32, as a computer-readable storage medium, can be used to store software programs and computer-executable programs, such as program instructions/modules corresponding to the methods in the embodiments of the present disclosure. The processor 31 executes functional applications and data processing by running software programs, instructions and modules stored in the memory 32, that is, implements the methods in the foregoing method embodiments.

The memory 32 may include a program storage area and a data storage area, wherein the program storage area may store an operating system and an application program required by at least one function; the data storage area may store data created according to the use of the terminal device, and the like. In addition, the memory 32 may include a high-speed random access memory, and may also include a non-volatile memory.

An embodiment of the present disclosure provides an intelligent fresh air fan, including the device for controlling the fresh air fan provided in the foregoing embodiments.

An embodiment of the present disclosure provides a computer-readable storage medium storing computer-executable instructions, and the computer-executable instructions are configured to execute the method for controlling a fresh air fan provided in the foregoing embodiments.

An embodiment of the present disclosure provides a computer program product. The computer program product includes a computer program stored on a computer-readable storage medium. The computer program includes program instructions. When the program instructions are executed by a computer, the computer is made to execute the information provided in the foregoing embodiments. The method used to control fresh air fans.

The above-mentioned computer-readable storage medium may be a transitory computer-readable storage medium, or a non-transitory computer-readable storage medium.

The technical solutions of the embodiments of the present disclosure can be embodied in the form of software products, which are stored in a storage medium and include one or more instructions to enable a computer device (which may be a personal computer, a server, or a network equipment, etc.) to execute all or part of the steps of the methods in the embodiments of the present disclosure. The aforementioned storage medium can be a non-transitory storage medium, including: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk, etc. A medium that can store program code, or a transitory storage medium.

The above description and drawings sufficiently illustrate the embodiments of the present disclosure to enable those skilled in the art to practice them. Other embodiments may incorporate structural, logical, electrical, procedural, and other changes. The examples merely represent possible variations. Individual components and functions are optional unless explicitly required, and the order of operations may vary. Portions and features of some embodiments may be included in or substituted for those of other embodiments. Also, the terms used in the present application are used to describe the embodiments only and are not used to limit the claims. As used in the examples and description of the claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well unless the context clearly indicates otherwise . Additionally, when used in this application, the term "comprise" and its variants "comprises" and/or comprising (comprising) etc. refer to stated features, integers, steps, operations, elements, and/or The presence of a component does not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components and/or groupings of these. Without further limitations, an element qualified by the statement "comprising a ..." does not preclude the presence of additional identical elements in the process, method or apparatus comprising the element. Herein, what each embodiment focuses on may be the difference from other embodiments, and the same and similar parts of the various embodiments may refer to each other. For the method, product, etc. disclosed in the embodiment, if it corresponds to the method part disclosed in the embodiment, then the relevant part can refer to the description of the method part.

Those skilled in the art can appreciate that the units and algorithm steps of the examples described in conjunction with the embodiments disclosed herein can be implemented by electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed by hardware or software may depend on the specific application and design constraints of the technical solution. Skilled artisans may implement the described functions using different methods for each specific application, but such implementation should not be considered as exceeding the scope of the disclosed embodiments. Those skilled in the art can clearly understand that, for the convenience and brevity of description, the specific working process of the above-described system, device and unit can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the embodiments disclosed herein, the disclosed methods and products (including but not limited to devices, equipment, etc.) can be implemented in other ways. For example, the device embodiments described above are only illustrative. For example, the division of units may only be a logical function division. In actual implementation, there may be other division methods. For example, multiple units or components may be combined or may be Integrate into another system, or some features may be ignored, or not implemented. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms. A unit described as a separate component may or may not be physically separated, and a component displayed as a unit may or may not be a physical unit, that is, it may be located in one place, or may be distributed to multiple network units. Some or all of the units can be selected according to actual needs to implement this embodiment. In addition, each functional unit in the embodiments of the present disclosure may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.

The flowchart and block diagrams in the figures illustrate the architecture, functionality, and operation of possible implementations of systems, methods and computer program products according to embodiments of the disclosure. In this regard, each block in a flowchart or block diagram may represent a module, program segment, or part of code that includes one or more executable instruction. In some alternative implementations, the functions noted in the block may occur out of the order noted in the figures. For example, two blocks in succession may, in fact, be executed substantially concurrently, or they may sometimes be executed in the reverse order, depending upon the functionality involved. Each block in the block diagrams and/or flowcharts, and combinations of blocks in the block diagrams and/or flowcharts, can be implemented by a dedicated hardware-based system that performs the specified function or action, or can be implemented by dedicated hardware implemented in combination with computer instructions.

Claims (10)

1. A method for controlling a fresh air machine, comprising:

obtaining an indoor pollution index and an outdoor pollution index;

obtaining a first set rotational speed of an intake fan positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index, and a second set rotational speed of an exhaust fan negatively correlated with the indoor pollution index and negatively correlated with the outdoor pollution index; wherein the influence of the indoor pollution index on the first set rotating speed is greater than the influence of the outdoor pollution index on the first set rotating speed, and the influence of the indoor pollution index on the second set rotating speed is less than the influence of the outdoor pollution index on the second set rotating speed; the effect of the indoor pollution index on the first set rotation speed being greater than the effect of the outdoor pollution index on the first set rotation speed means that: the increasing value of the first set rotating speed corresponding to the indoor pollution exponential increase unit concentration is greater than the increasing value of the first set rotating speed corresponding to the outdoor pollution exponential increase unit concentration; the influence of the indoor pollution index on the second set rotation speed being smaller than the influence of the outdoor pollution index on the second set rotation speed means that: the indoor pollution index reduces the increasing value of the second set rotating speed corresponding to the unit concentration, and is greater than the increasing value of the second set rotating speed corresponding to the unit concentration reduced outdoor concentration;

and controlling the air inlet fan according to the first set rotating speed, and controlling the air exhaust fan according to the second set rotating speed.

2. The method according to claim 1, wherein obtaining a first set rotation speed positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index, and a second set rotation speed negatively correlated with the indoor pollution index and negatively correlated with the outdoor pollution index comprises:

obtaining a first product of the indoor pollution index and a first coefficient and a second product of the outdoor pollution index and a second coefficient, and determining a first sum of the first product and the second product as the first set rotating speed, wherein the first coefficient is greater than the second coefficient;

and obtaining a third product of the indoor pollution index and a third coefficient and a fourth product of the outdoor pollution index and a fourth coefficient, and determining the reciprocal of a second sum of the third product and the fourth product as the second set rotating speed, wherein the fourth coefficient is greater than the third coefficient.

3. The method of claim 1, before obtaining the first set rotational speed and the second set rotational speed, further comprising:

obtaining a ratio of the first set rotation speed to the second set rotation speed, which is positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index.

4. The method of any of claims 1 to 3, wherein controlling the intake air blower according to the first set rotational speed and controlling the exhaust air blower according to the second set rotational speed comprises:

obtaining a current pressure difference value between a current indoor pressure and a current outdoor pressure under the condition that the indoor pollution index is less than or equal to a first set pollution index and the outdoor pollution index is less than or equal to a second set pollution index; and controlling the air inlet fan and the air exhaust fan according to a preset pressure difference value and the current pressure difference value so that the absolute value of the current pressure difference value reaches the preset pressure difference value.

5. The method of claim 4, wherein controlling the intake air blower and the exhaust air blower based on a preset pressure differential value and the current pressure differential value comprises:

when the current indoor pressure is higher than the current outdoor pressure and the absolute value of the current pressure difference is smaller than the preset pressure, increasing the rotating speed of the air inlet fan; if the absolute value of the current pressure difference does not reach the preset pressure difference within a first set time period, reducing the rotating speed of the exhaust fan;

under the condition that the current indoor pressure is lower than the current outdoor pressure and the absolute value of the current pressure difference is lower than the preset pressure, the rotating speed of the exhaust fan is increased; and if the absolute value of the current pressure difference does not reach the preset pressure difference within a first set time period, reducing the rotating speed of the air inlet fan.

6. The method of claim 4, wherein the determination that the current pressure difference value reaches the preset pressure difference value comprises:

under the condition of improving the absolute value of the current pressure difference, if the duration of the current pressure difference is greater than or equal to a second set duration, determining that the absolute value of the current pressure difference reaches the preset pressure difference;

and under the condition of reducing the absolute value of the current pressure difference, if the duration of the current pressure difference is less than or equal to the preset pressure difference and is greater than or equal to a second set duration, determining that the absolute value of the current pressure difference reaches the preset pressure difference.

7. The method according to any one of claims 1 to 3,

obtaining a first set rotation speed positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index and a second set rotation speed negatively correlated with the indoor pollution index and negatively correlated with the outdoor pollution index in a case where the indoor pollution index is smaller than a third set pollution index;

and under the condition that the indoor pollution index is greater than or equal to a third set pollution index, determining the first set rotating speed as the maximum rotating speed of the air inlet fan, and determining the second set rotating speed as the maximum rotating speed of the air exhaust fan.

8. A device for controlling a fresh air machine, comprising:

a first obtaining module configured to obtain an indoor pollution index and an outdoor pollution index;

a second obtaining module configured to obtain a first set rotation speed positively correlated with the indoor pollution index and positively correlated with the outdoor pollution index, and a second set rotation speed negatively correlated with the indoor pollution index and negatively correlated with the outdoor pollution index; wherein the influence of the indoor pollution index on the first set rotating speed is greater than the influence of the outdoor pollution index on the first set rotating speed, and the influence of the indoor pollution index on the second set rotating speed is less than the influence of the outdoor pollution index on the second set rotating speed; the effect of the indoor pollution index on the first set rotation speed being greater than the effect of the outdoor pollution index on the first set rotation speed means that: the increasing value of the first set rotating speed corresponding to the indoor pollution exponential increase unit concentration is greater than the increasing value of the first set rotating speed corresponding to the outdoor pollution exponential increase unit concentration; the influence of the indoor pollution index on the second set rotating speed, which is smaller than the influence of the outdoor pollution index on the second set rotating speed, means that: the indoor pollution index is reduced, and the increase value of the second set rotating speed corresponding to the unit concentration is larger than the increase value of the second set rotating speed corresponding to the unit concentration reduced outdoor;

a control module configured to control an intake fan according to the first set rotational speed and an exhaust fan according to the second set rotational speed.

9. An apparatus for controlling a fresh air machine comprising a processor and a memory storing program instructions, wherein the processor is configured to perform the method for controlling a fresh air machine of any of claims 1 to 7 when executing the program instructions.

10. An intelligent ventilator comprising an apparatus for controlling a ventilator as claimed in claim 8 or 9.

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