CN112325453B - Fresh air volume adjusting method and system and fresh air fan - Google Patents
Fresh air volume adjusting method and system and fresh air fan Download PDFInfo
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- CN112325453B CN112325453B CN202011061281.3A CN202011061281A CN112325453B CN 112325453 B CN112325453 B CN 112325453B CN 202011061281 A CN202011061281 A CN 202011061281A CN 112325453 B CN112325453 B CN 112325453B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/56—Remote control
- F24F11/58—Remote control using Internet communication
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/72—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure
- F24F11/74—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling air flow rate or air velocity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/20—Humidity
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
- F24F2110/64—Airborne particle content
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
- F24F2110/65—Concentration of specific substances or contaminants
- F24F2110/66—Volatile organic compounds [VOC]
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F2110/00—Control inputs relating to air properties
- F24F2110/50—Air quality properties
- F24F2110/65—Concentration of specific substances or contaminants
- F24F2110/70—Carbon dioxide
Abstract
The invention discloses a fresh air volume adjusting method, a fresh air volume adjusting system and a fresh air fan, wherein the fresh air volume adjusting system comprises a sensor and a data processing module; the sensors comprise a plurality of groups of pollutant sensors, and each group of pollutant sensors comprise an indoor sensor and an outdoor sensor; the pollutant sensor sends the detected concentration parameters of pollutants to the data processing module, and the data processing module compares and analyzes the concentration parameters of indoor and outdoor pollutants and selects a corresponding air supply mode; in the air mixing mode, firstly, the single fresh air quantity required by the pollutant is calculated according to the hazard and the pollution degree of the pollutant, and then the comprehensive fresh air quantity is calculated by combining the weight coefficients of a plurality of pollutants; the data processing module controls the opening of an air valve in the fan body, adjusts the proportion of fresh air and return air, and achieves the required fresh air quantity. The invention can provide proper fresh air volume for occasions with various pollutants and different fresh air volumes required by various pollutants.
Description
Technical Field
The invention relates to a fresh air volume adjusting method and device, in particular to a fresh air volume adjusting method, a fresh air volume adjusting system and a fresh air fan.
Background
Along with the improvement of living standard, people also have higher and higher requirements on air quality, and the fresh air fan can exchange indoor and outdoor air, adjust indoor temperature and humidity, and be widely used in people's life and work.
The existing detection system of the fresh air fan generally detects the concentration of a single pollutant through indoor and outdoor sensors, so that the fresh air quantity is adjusted. Therefore, although the air volume can be adjusted in real time according to actual conditions, the air volume can be adjusted only for a single pollutant, and the air volume adjusting device cannot be used in occasions where various pollutants exist and the required fresh air volumes of various pollutants are different, so that the proper fresh air volume cannot be provided, and the user experience is influenced.
Disclosure of Invention
The present invention has been made to overcome the above-described problems, and an object of the present invention is to provide a fresh air volume adjusting method capable of providing an appropriate fresh air volume in response to the presence of a plurality of pollutants and different fresh air volumes required for the respective pollutants.
Another object of the present invention is to provide a fresh air volume adjusting system and a fresh air blower.
The purpose of the invention is realized by the following technical scheme:
a fresh air volume adjusting method comprises the following steps:
acquiring pollutant parameters in indoor and outdoor air through pollutant sensors;
analyzing and comparing indoor and outdoor pollutant parameters, and selecting an air supply mode of the fresh air fan; the air supply mode comprises an air mixing mode;
in the air mixing mode, firstly, the single fresh air quantity required by the pollutant is calculated according to the hazard and the pollution degree of the pollutant, and then the comprehensive fresh air quantity is calculated by combining the weight coefficients of a plurality of pollutants;
the proportion of fresh air and return air is adjusted by changing the opening of an air valve in the fresh air fan, so that the required fresh air quantity is achieved.
In a preferred embodiment of the present invention, when the indoor pollutant parameter is greater than or equal to the outdoor pollutant parameter, the air mixing mode or the external circulation mode is started;
and when the indoor pollutant parameter is smaller than the outdoor pollutant parameter, starting an internal circulation mode.
Preferably, in the internal circulation mode, the fresh air inlet is closed, the air valve is opened, and indoor air enters from the return air inlet and exits from the indoor air outlet;
in the air mixing mode, the fresh air inlet is opened, the air valve is opened, and the indoor air and the outdoor fresh air are mixed and then discharged from the indoor air outlet;
in the external circulation mode, a fresh air inlet is opened, an air valve is closed, a fresh air channel and a return air channel are completely isolated, and indoor return air enters from a return air inlet and exits from a return air outlet; outdoor fresh air enters from the fresh air inlet and exits from the indoor air outlet.
A preferred embodiment of the invention, wherein the fresh air volume S required for a single pollutantiThe calculation method comprises the following steps:
in the formula (I), the compound is shown in the specification,
is the hazard coefficient for the contaminant,
in order to displace the effective coefficient for air,
as the concentration of the contaminant in the room,
as the outdoor concentration of the contaminant,
is the volume of the indoor space.
Preferably, the method for calculating the comprehensive fresh air volume Y comprises the following steps:
in the formula, E is a pollutant-fresh air volume weight coefficient.
In a preferred scheme of the invention, in operation, the air quality index in the weather forecast is acquired through the network transmission module;
if the air quality index is greater than the average quality index and the current air supply mode is the air mixing mode or the external circulation mode, the internal circulation mode is started after time t1, and the working state of the air supply mode is recovered to be determined by the indoor and outdoor pollutant parameters after time t 2. Specifically, the time t1 and the time t2 may be set according to actual conditions, for example, the time t1 is 0.5h, and the time t2 is 2 h.
Preferably, if the weather forecast gives an extreme weather early warning, the internal circulation mode is started immediately; and after the extreme weather early warning is released, the working state of the air supply mode is recovered to the working state determined by indoor and outdoor pollutant parameters.
In a preferred embodiment of the present invention, the humidity sensor detects the indoor humidity, and when the indoor humidity is less than the set lower humidity limit s1, the humidification module is started; when the indoor humidity is greater than the set upper humidity limit s2, the humidifying module is closed; when the indoor humidity is greater than the lower humidity limit s1 and less than the upper humidity limit s2, the current humidification module state is maintained.
Preferably, when the information about rainfall is acquired through the network transmission module, the indoor humidity is greater than the lower humidity limit s1, and the fresh air fan is in the external circulation mode or the air mixing mode, the mode is directly switched to the internal circulation mode, so that the fresh air with overhigh humidity is prevented from being introduced into the room.
A fresh air volume adjusting system comprises a sensor and a data processing module; the sensor comprises a plurality of groups of pollutant sensors for detecting concentration parameters of various pollutants, and each group of pollutant sensors comprises an indoor sensor and an outdoor sensor;
the pollutant sensor sends the detected concentration parameters of pollutants to the data processing module, and the data processing module compares and analyzes the concentration parameters of indoor and outdoor pollutants and selects a corresponding air supply mode; in the air mixing mode, firstly, the single fresh air quantity required by the pollutant is calculated according to the hazard and the pollution degree of the pollutant, and then the comprehensive fresh air quantity is calculated by combining the weight coefficients of a plurality of pollutants; the data processing module controls the opening of an air valve in the fan body, adjusts the proportion of fresh air and return air, and achieves the required fresh air quantity.
In a preferred embodiment of the present invention, the weather forecast system further comprises a network transmission module, and the data processing module is connected to the weather forecast center through the network transmission module to obtain weather forecast information. Through above-mentioned structure, acquire weather forecast data and obtain information such as air quality and rainfall, extreme weather, new fan reacts to various environment in advance, when avoiding external environment to change, new fan brings the new trend of low quality into indoor in the reaction time.
Further, the network transmission module is a wireless network module, specifically a 4G module or a 5G module.
In a preferred embodiment of the present invention, the humidity sensor further comprises a humidity sensor for detecting the humidity in the room; the humidifying module, the humidity sensor and the data processing module are electrically connected.
A new fan comprises a fan body and a new air volume adjusting system.
Compared with the prior art, the invention has the following beneficial effects:
the novel fan can detect the concentration of various indoor and outdoor pollutants, generally more than one pollutant is used indoors and outdoors, the harmfulness of different pollutants is different, the novel fan can judge the indoor required fresh air volume according to the concentration of different indoor and outdoor pollutants, when various pollutants exist, the novel fan calculates the fresh air volume required by a single pollutant according to the harmfulness and pollution degree of different pollutants, and then calculates the comprehensive fresh air volume through the weight coefficient of the corresponding pollutant.
Drawings
Fig. 1 is a schematic view of a fresh air machine according to the present invention.
Fig. 2 is a flow chart of the operation of the fresh air machine in the present invention.
Fig. 3 is a blowing mode diagram of the fresh air blower in the present invention, wherein the left side is an internal circulation mode, the middle is a mixing mode, and the right side is an external circulation mode.
Detailed Description
In order to make those skilled in the art understand the technical solutions of the present invention well, the following description of the present invention is provided with reference to the embodiments and the accompanying drawings, but the embodiments of the present invention are not limited thereto.
Referring to fig. 1, the new fan in this embodiment includes a fan body and a new air volume adjusting system, where the new air volume adjusting system includes a sensor and a data processing module; the sensor includes the pollutant sensor that the concentration parameter that is used for multiple pollutant detected, and every group pollutant sensor all includes indoor sensor and outdoor sensor. Specifically, the multiple sets of pollutant sensors are respectively used for detecting sulfur dioxide, formaldehyde, carbon dioxide, PM2.5 and the like.
The pollutant sensor sends the detected concentration parameters of pollutants to a data processing module (the data processing module in the embodiment is arranged in the fan body and is composed of a processor), and the data processing module compares and analyzes the concentration parameters of indoor and outdoor pollutants and selects a corresponding air supply mode; in the air mixing mode, firstly, the single fresh air quantity required by the pollutant is calculated according to the hazard and the pollution degree of the pollutant, and then the comprehensive fresh air quantity is calculated by combining the weight coefficients of a plurality of pollutants; the data processing module controls the opening of an air valve in the fan body, adjusts the proportion of fresh air and return air, and achieves the required fresh air quantity. In particular, toxic substances such as sulfur dioxide and formaldehyde are generally most harmful, so that the weight coefficient of the substances is the largest, and the weight coefficient of substances with less harm such as carbon dioxide and PM2.5 is smaller.
Referring to fig. 1, the fresh air volume adjusting system further includes a network transmission module, and the data processing module is connected to a weather forecast center through the network transmission module to obtain weather forecast information. Through above-mentioned structure, acquire weather forecast data and obtain information such as air quality and rainfall, extreme weather, new fan reacts to various environment in advance, when avoiding external environment to change, new fan brings the new trend of low quality into indoor in the reaction time. Specifically, the network transmission module is a 4G module or a 5G module. According to the novel air blower, weather forecast data is obtained through the 4G module, and according to information such as rainfall, air quality index and extreme weather early warning of weather forecast, real-time monitoring information of various indoor and outdoor sensors is referred to, an internal and external circulation mode of the novel air blower is changed in advance, and the problem of hysteresis of the traditional novel air blower is solved.
Referring to fig. 1, the fresh air volume adjusting system further includes a humidification module, and the sensor further includes a humidity sensor for detecting indoor humidity; the humidifying module, the humidity sensor and the data processing module are electrically connected. Detecting the indoor humidity through a humidity sensor, and starting a humidifying module when the indoor humidity is less than a set humidity lower limit s 1; when the indoor humidity is greater than the set upper humidity limit s2, the humidifying module is closed; when the indoor humidity is greater than the lower humidity limit s1 and less than the upper humidity limit s2, the current humidification module state is maintained. Specifically, the lower limits of humidity s1 and s2 are selected from the range of 50 to 80%, depending on the particular application.
Further, when the information about rainfall is acquired through the network transmission module, the indoor humidity is greater than the humidity lower limit s1, and the fresh air fan is in an external circulation mode or a mixed air mode, the mode is directly switched to the internal circulation mode, and the situation that fresh air with overhigh humidity is introduced into the room is avoided.
Referring to fig. 2 to 3, the fresh air volume adjusting method in the present embodiment includes the following steps:
contaminant parameters in indoor and outdoor air are obtained by contaminant sensors.
Analyzing and comparing indoor and outdoor pollutant parameters, and selecting an air supply mode of the fresh air fan; the air supply mode also comprises an inner circulation mode, an air mixing mode and an outer circulation mode; in the internal circulation mode, the fresh air inlet is closed, the air valve is opened, and indoor air enters from the return air inlet and exits from the indoor air outlet; in the air mixing mode, the fresh air inlet is opened, the air valve is opened, and the indoor air and the outdoor fresh air are mixed and then discharged from the indoor air outlet; in the external circulation mode, a fresh air inlet is opened, an air valve is closed, a fresh air channel and a return air channel are completely isolated, and indoor return air enters from a return air inlet and exits from a return air outlet; outdoor fresh air enters from the fresh air inlet and exits from the indoor air outlet.
When the indoor pollutant parameter is larger than or equal to the outdoor pollutant parameter, starting a wind mixing mode or an external circulation mode; and when the indoor pollutant parameter is smaller than the outdoor pollutant parameter, starting an internal circulation mode.
In the mixed air mode, the single fresh air quantity required by the pollutant is calculated according to the hazard and the pollution degree of the pollutant, and then the comprehensive fresh air quantity is calculated by combining the weight coefficients of a plurality of pollutants. Wherein the fresh air quantity S required by a single pollutantiThe calculation method comprises the following steps:
in the formula (I), the compound is shown in the specification,
is the hazard coefficient for the contaminant,
in order to displace the effective coefficient for air,
as the concentration of the contaminant in the room,
as the outdoor concentration of the contaminant,
is the volume of the indoor space.
Further, the method for calculating the comprehensive fresh air volume Y comprises the following steps:
in the formula, E is a pollutant-fresh air volume weight coefficient.
The proportion of fresh air and return air is adjusted by changing the opening of an air valve in the fresh air fan, so that the required fresh air quantity is achieved.
In the working of the embodiment, the air quality index in the weather forecast is obtained through the network transmission module;
if the air quality index is greater than the average quality index and the current air supply mode is the air mixing mode or the external circulation mode, the internal circulation mode is started after time t1, and the working state of the air supply mode is recovered to be determined by the indoor and outdoor pollutant parameters after time t 2. Specifically, the time t1 and the time t2 may be set according to actual conditions, for example, the time t1 is 0.5h, and the time t2 is 2 h.
Further, if extreme weather early warning is given out by weather forecast, an internal circulation mode is started immediately; and after the extreme weather early warning is released, the working state of the air supply mode is recovered to the working state determined by indoor and outdoor pollutant parameters.
The present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.
Claims (8)
1. A fresh air volume adjusting method is characterized by comprising the following steps:
acquiring pollutant parameters in indoor and outdoor air through pollutant sensors;
analyzing and comparing indoor and outdoor pollutant parameters, and selecting an air supply mode of the fresh air fan; the air supply mode comprises an air mixing mode; when the indoor pollutant parameter is larger than or equal to the outdoor pollutant parameter, starting a wind mixing mode or an external circulation mode; when the indoor pollutant parameter is smaller than the outdoor pollutant parameter, starting an internal circulation mode;
in the air mixing mode, firstly, the single fresh air quantity required by the pollutant is calculated according to the hazard and the pollution degree of the pollutant, and then the comprehensive fresh air quantity is calculated by combining the weight coefficients of a plurality of pollutants;
the ratio of fresh air to return air is adjusted by changing the opening of an air valve in the fresh air fan to achieve the required fresh air quantity;
fresh air quantity S required by single pollutantiThe calculation method comprises the following steps:
in the formula (I), the compound is shown in the specification,
is the hazard coefficient for the contaminant,
in order to displace the effective coefficient for air,
as the concentration of the contaminant in the room,
as the outdoor concentration of the contaminant,
is the volume of the indoor space.
2. The fresh air volume adjusting method according to claim 1, wherein in the internal circulation mode, the fresh air inlet is closed, the air valve is opened, and indoor air enters from the return air inlet and exits from the indoor air outlet;
in the air mixing mode, the fresh air inlet is opened, the air valve is opened, and the indoor air and the outdoor fresh air are mixed and then discharged from the indoor air outlet;
in the external circulation mode, a fresh air inlet is opened, an air valve is closed, a fresh air channel and a return air channel are completely isolated, and indoor return air enters from a return air inlet and exits from a return air outlet; outdoor fresh air enters from the fresh air inlet and exits from the indoor air outlet.
3. The fresh air volume adjusting method according to claim 1, wherein the method of calculating the integrated fresh air volume Y is:
in the formula, E is a pollutant-fresh air volume weight coefficient.
4. The fresh air volume adjusting method according to claim 1, wherein in operation, an air quality index in a weather forecast is obtained through a network transmission module;
if the air quality index is larger than the average quality index and the current air supply mode is the air mixing mode or the external circulation mode, starting the internal circulation mode after time t1, and recovering to the working state of the air supply mode determined by the indoor and outdoor pollutant parameters after time t 2;
if the weather forecast gives out extreme weather early warning, an internal circulation mode is started immediately; and after the extreme weather early warning is released, the working state of the air supply mode is recovered to the working state determined by indoor and outdoor pollutant parameters.
5. The fresh air volume adjusting method according to claim 1, wherein the humidity in the room is detected by a humidity sensor, and when the humidity in the room is less than a set lower humidity limit s1, the humidification module is activated; when the indoor humidity is greater than the set upper humidity limit s2, the humidifying module is closed; when the indoor humidity is greater than the lower humidity limit s1 and less than the upper humidity limit s2, the current humidification module state is maintained.
6. The fresh air volume adjusting method according to claim 5, wherein when information about rainfall is acquired through the network transmission module, and when the indoor humidity is greater than the lower humidity limit s1 and the fresh air fan is in an external circulation mode or an air mixing mode, the indoor humidity is directly switched to the internal circulation mode, so that the introduction of fresh air with excessively high humidity into the room is avoided.
7. A fresh air volume adjusting system to which the fresh air volume adjusting method according to any one of claims 1 to 6 is applied, comprising a sensor and a data processing module; the sensor comprises a plurality of groups of pollutant sensors for detecting concentration parameters of various pollutants, and each group of pollutant sensors comprises an indoor sensor and an outdoor sensor;
the pollutant sensor sends the detected concentration parameters of pollutants to the data processing module, and the data processing module compares and analyzes the concentration parameters of indoor and outdoor pollutants and selects a corresponding air supply mode; in the air mixing mode, firstly, the single fresh air quantity required by the pollutant is calculated according to the hazard and the pollution degree of the pollutant, and then the comprehensive fresh air quantity is calculated by combining the weight coefficients of a plurality of pollutants; the data processing module controls the opening of an air valve in the fan body, adjusts the proportion of fresh air and return air, and achieves the required fresh air quantity.
8. A new fan characterized by comprising a fan body and the new air volume adjusting system of claim 7.
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| CN116358127B (en) * | 2023-03-31 | 2023-10-27 | 清华大学 | Subway station fresh air valve control method and device, electronic equipment and storage medium |
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| CN111288583A (en) * | 2020-03-13 | 2020-06-16 | 清华大学 | Multifunctional fresh air purifier and operation control method |
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