CN114738876A - Variable-frequency speed reduction motor equipment and method for realizing feedback adjustment of fresh air system - Google Patents
Variable-frequency speed reduction motor equipment and method for realizing feedback adjustment of fresh air system Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000009423 ventilation Methods 0.000 claims abstract description 55
- 239000000428 dust Substances 0.000 claims abstract description 26
- 230000035807 sensation Effects 0.000 claims description 12
- 239000013618 particulate matter Substances 0.000 claims description 10
- 230000006870 function Effects 0.000 claims description 9
- 230000009123 feedback regulation Effects 0.000 claims description 6
- 238000012216 screening Methods 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 5
- 239000002245 particle Substances 0.000 claims description 5
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- 230000008447 perception Effects 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 abstract description 6
- 241000883990 Flabellum Species 0.000 description 4
- 238000007781 pre-processing Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
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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
- F24F6/00—Air-humidification, e.g. cooling by humidification
-
- 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
- F24F11/0008—Control or safety arrangements for air-humidification
-
- 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
- F24F11/62—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
- F24F11/65—Electronic processing for selecting an operating mode
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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
- F24F11/77—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 by controlling the speed of ventilators
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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
- F24F11/79—Control systems characterised by their outputs; Constructional details thereof for controlling the supply of treated air, e.g. its pressure for controlling the direction of the supplied air
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F7/00—Ventilation
- F24F7/007—Ventilation with forced flow
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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
- F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
- F24F13/24—Means for preventing or suppressing noise
- F24F2013/247—Active noise-suppression
-
- 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
- F24F2110/10—Temperature
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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
- F24F2130/00—Control inputs relating to environmental factors not covered by group F24F2110/00
- F24F2130/40—Noise
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
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- Air Conditioning Control Device (AREA)
Abstract
The invention relates to a variable-frequency speed reduction motor device and method for realizing feedback adjustment of a fresh air system. Working power of the humidifier is calculated according to the temperature, the humidity and the dust amount of the environment, and ventilation amount required by the ventilation fan is calculated according to parameters such as the working power of the humidifier, the environment temperature and the humidity; at the moment, the sufficient ventilation quantity is ensured, the ventilation is ensured to realize the suitability adjustment of the environmental temperature, and the unsuitable environmental temperature change caused by adjusting the ventilation quantity is avoided; simultaneously, collecting environmental noise by using a microphone, and calculating the required fan rotating speed and the required blade angle according to the ventilation quantity; calculating the working noise of the fan according to the parameters, and converting the fan noise into loudness level by using an equal loudness curve; thereby ensuring that the adjusting result is more suitable for the manual work environment; and comparing the control result with the ambient noise, and readjusting the power of the humidifier when the control result is much higher than the ambient noise, so as to further adjust the rotating speed of the fan to find the most appropriate working parameter of the fan.
Description
Technical Field
The invention relates to the field of speed reducer control, in particular to variable-frequency speed reduction motor equipment and a method for realizing feedback adjustment of a fresh air system.
Background
The fresh air system is a set of independent air processing system consisting of an air supply system and an air exhaust system and is divided into a pipeline type fresh air system and a pipeline-free fresh air system. Pipeline formula new trend system comprises new fan and pipe fittings, purifies the leading-in indoor of outdoor air through new fan, discharges the room air through the pipeline. The industrial fan system driven by the speed reduction motor needs to consider the factors such as comfort, air quantity, dust, noise and the like of people, and how to realize intelligent accurate control is the problem which needs to be solved at present.
The utility model application number CN201720153623.1 discloses an adjustable high-efficient air supply unit, including air supply unit main part, humidity transducer, controlling means, motor, air intake, fixed plate, flabellum, dehydrating unit, electrostatic precipitator, active carbon dust collector, air outlet and through-hole, the inside of air supply unit main part is equipped with the fixed plate, be fixed with the motor on the fixed plate, the below of motor is equipped with the flabellum, the output of motor is connected with the input of flabellum, the upper end of motor is equipped with the air intake, one side of air intake is equipped with humidity transducer, and the upper end of fixed plate still is equipped with controlling means, and adjustable high-efficient air supply unit carries out humidity control to the air that gets into through setting up a plurality of through-holes at the flabellum, reduces the produced noise of fan during operation, but simple mechanical regulation is difficult to realize working parameter's optimization, the environmental noise is too large, and the ventilation system has too large influence on the environmental temperature or is difficult to rapidly reduce the dust amount.
Disclosure of Invention
In view of the above, in order to solve the above problems, a variable frequency speed reduction motor device for realizing feedback adjustment of a fresh air system is provided, which includes a main controller, a humidifier, a speed reduction motor, a fan, a blade angle controller, an analysis module, and a plurality of sensors.
The speed reduction motor drives the fan to rotate so as to realize the operation of the fresh air system, and the blade angle controller controls the blade angle;
the main controller controls the humidifier to humidify the environment, controls the rotating speed of the accelerating motor, and controls the blade angle controller to adjust the blade angle;
the sensors comprise a microphone, a particulate matter sensor, a temperature sensor and a humidity sensor; the microphone, the particulate matter sensor, the temperature sensor and the humidity sensor are connected to the analysis module, and the analysis module is connected to the main controller; the analysis module analyzes data collected by the microphone, the particulate matter sensor, the temperature sensor and the humidity sensor, and outputs adjustment parameters of the humidifier, the speed reduction motor and the blade angle controller only through the main controller; the main controller controls the humidifier and the fan to adjust the humidity, noise and dust amount of the environment according to the adjustment parameters of the humidifier, the speed reduction motor and the blade angle controller.
The fan is an exhaust fan, and the analysis module stores the correlation between the fan rotating speed v and the blade angle r under the condition of ensuring the fixed ventilation quantity F; that is, the blade angle r can be calculated according to the known ventilation F and the fan rotating speed v; and the centre frequency and sound pressure level of the noise of the fan at a determined fan speed v is known;
the temperature sensor, the humidity sensor and the particulate matter sensor are used for detecting the temperature, the humidity and the dust amount of the environment, so that the temperature T, the humidity H and the dust amount D of the environment are obtained;
the analysis module stores a standard equal loudness curve, wherein the loudness level L with the frequency fNAnd sound pressure level LpThe relationship of (1) is:
wherein:
Tfis the hearing threshold in decibels; a. thefIs loudness perception power exponent; l is a radical of an alcoholUIs the amplitude in decibels for a 1000Hz normalized linear transfer function;
the microphone collects sound audio segments in the environment and sends the audio segments to the analysis module, the analysis module preprocesses the audio segments and then inputs the preprocessed audio segments into audio processing software to calculate the loudness level of the actual listening sensation of the audio segments, and the loudness level L of the environment sound under the actual listening sensation is obtainedN1；
The control method comprises the following specific steps:
step 1, calculating the power of a humidifier by an analysis module:
wherein k is1And k2The constant coefficient is set according to experience; p0For the base power of the humidifier D0Adjusting a threshold for the dust amount;
step 2, calculating the ventilation volume of the fan by an analysis module:
wherein k is3To k to5The constant coefficient is set according to experience; f0Based on the ventilation, T0The threshold is adjusted for temperature.
Step 3, obtaining the angle r (v) of the fan blade according to the calculated ventilation quantity F; namely, the angle of the fan blade with fixed ventilation quantity is a function of the rotating speed of the fan;
traversing all the ranges of the allowable fan rotating speed v corresponding to the central frequency and the sound pressure level range of the fan noise of the ventilation quantity F, and substituting the sound pressure level corresponding to each central frequency into a formula (2) to calculate the loudness level of the fan noise; screening out loudness level LN2Lowest corresponding fan speed vLminAnd v isLminCalculating the fan blade angle r;
step 4, simultaneously comparing the loudness level L of the fan noiseN2Loudness level L with ambient soundN1Make a comparison if LN2＞LN1+ C; wherein C is a preset constant; let P' = P + P1(ii) a Wherein P is1The amount of humidifier power increase; calculating ventilation quantity, fan rotating speed and blade angle again through the step 2 and the step 3 according to the new humidifier power as the P';
step 5, repeating step 4, comparing the recalculated loudness level L of the fan noiseN2Loudness level L with ambient soundN1Up to LN2≤LN1+ C or the humidifier reaches maximum power;
and 6, controlling the humidifier, the speed reducing motor and the blade angle controller to work according to the finally obtained humidifier power, the fan rotating speed and the blade angle.
The analysis module carries out noise reduction on the audio segment in a preprocessing mode, the noise reduction mode is that the audio segment is subjected to frequency domain conversion, and then the noise frequency of the audio segment in a working state of the fan rotating speed v and the blade angle r corresponding to the fan working at the current moment is deducted from the converted frequency domain data.
A method for realizing feedback adjustment of a fresh air system by using the equipment comprises the following steps:
a, detecting the temperature, the humidity and the dust amount of an environment by a temperature sensor, a humidity sensor and a particle sensor so as to obtain the temperature T, the humidity H and the dust amount D of the environment;
the microphone collects sound audio segments in the environment and sends the audio segments to the analysis module, the analysis module preprocesses the audio segments and then inputs the preprocessed audio segments into audio processing software to calculate the loudness level of the actual listening sensation of the audio segments, and the loudness level L of the environment sound under the actual listening sensation is obtainedN1(ii) a Because the noise of the environment is complex frequency and the calculation is more complex by directly utilizing the equal loudness curve, the loudness level of the actual hearing sense is calculated by directly utilizing audio processing software; of course, other mathematical methods may be used to calculate the loudness level of an audio segment, and are not described in detail herein.
Step b, calculating the power of the humidifier by the analysis module:
wherein k is1And k2The constant coefficient is set according to experience; p0For the base power of the humidifier D0Adjusting a threshold for the dust amount;
step c, calculating the ventilation volume of the fan by the analysis module:
wherein k is3To k is5The constant coefficient is set according to experience; f0Based on the ventilation, T0The threshold is adjusted for temperature.
D, obtaining the angle r (v) of the fan blade according to the calculated ventilation quantity F; the angle of the fan blades with fixed ventilation quantity is a function of the rotating speed of the fan at the moment;
traversing all the ranges of the allowable fan rotating speed v corresponding to the central frequency and the sound pressure level range of the fan noise of the ventilation quantity F, and substituting the sound pressure level corresponding to each central frequency into a formula (2) to calculate the loudness level of the fan noise; screening out loudness level LN2Lowest corresponding fan speed vLminAnd v isLminCalculating the fan blade angle r;
step e, simultaneously comparing the loudness level L of the fan noiseN2Loudness level L with ambient soundN1Making a comparison if LN2＞LN1+ C; wherein C is a preset constant; let P' = P + P1(ii) a Wherein P is1The amount of humidifier power increase; and according to the power P' as the new humidifier power, calculating the ventilation quantity, the fan rotating speed and the blade angle again through the steps c and d;
step f, repeating step e, comparing the recalculated loudness level L of the fan noiseN2Loudness level L with ambient soundN1Up to LN2≤LN1+ C or the humidifier reaches maximum power;
and g, controlling the humidifier, the speed reducing motor and the blade angle controller to work according to the finally obtained humidifier power, the fan rotating speed and the blade angle.
The invention has the beneficial effects that:
the working power of the humidifier is calculated according to the temperature, the humidity and the dust amount of the environment, and the ventilation amount required by the ventilation fan is calculated according to the working power, the environment temperature, the humidity and other parameters of the humidifier; at the moment, the sufficient ventilation quantity is ensured, the ventilation is ensured, the environment temperature can be adjusted properly, and the condition that the environment temperature is changed inappropriately due to the adjustment of the ventilation quantity is avoided;
simultaneously, collecting environmental noise by using a microphone, and calculating the required fan rotating speed and the required blade angle according to the ventilation quantity; calculating the working noise of the fan according to the parameters, and converting the fan noise into loudness level by using an equal loudness curve; thereby ensuring that the adjusting result is more suitable for the manual work environment;
and comparing the control result with the ambient noise, and readjusting the power of the humidifier when the control result is much higher than the ambient noise, so as to further adjust the rotating speed of the fan to find the most appropriate working parameter of the fan.
Drawings
The accompanying drawings, which are included to provide a further understanding of the disclosed subject matter, are incorporated in and constitute a part of this specification. The drawings illustrate the implementations of the disclosed subject matter and, together with the detailed description, serve to explain the principles of implementations of the disclosed subject matter. No attempt is made to show structural details of the disclosed subject matter in more detail than is necessary for a fundamental understanding of the disclosed subject matter and various modes of practicing the same.
FIG. 1 is a schematic diagram of the overall architecture of the present invention.
Detailed Description
The advantages, features and methods of accomplishing the same will become apparent from the drawings and the detailed description that follows.
Example 1:
the utility model provides a realize frequency conversion gear motor equipment of new trend system feedback regulation, includes main control unit, humidifier, gear motor, fan, blade angle controller, analysis module and a plurality of sensor.
The speed reduction motor drives the fan to rotate so as to realize the operation of the fresh air system, and the blade angle controller controls the blade angle;
the main controller controls the humidifier to humidify the environment, controls the rotating speed of the accelerating motor, and controls the blade angle controller to adjust the blade angle;
the sensors comprise a microphone, a particulate matter sensor, a temperature sensor and a humidity sensor; the microphone, the particulate matter sensor, the temperature sensor and the humidity sensor are connected to the analysis module, and the analysis module is connected to the main controller; the analysis module analyzes data collected by the microphone, the particulate matter sensor, the temperature sensor and the humidity sensor, and outputs adjustment parameters of the humidifier, the speed reduction motor and the blade angle controller only through the main controller; the main controller controls the humidifier and the fan to adjust the humidity, noise and dust amount of the environment according to the adjustment parameters of the humidifier, the speed reduction motor and the blade angle controller.
The fan is an exhaust fan, and the analysis module stores the correlation between the fan rotating speed v and the blade angle r under the condition of ensuring the fixed ventilation quantity F; that is, the blade angle r can be calculated according to the known ventilation F and the fan rotating speed v; and the centre frequency and sound pressure level of the noise of the fan at a determined fan speed v are known;
the temperature sensor, the humidity sensor and the particle sensor are used for detecting the temperature, the humidity and the dust amount of the environment, so that the temperature T, the humidity H and the dust amount D of the environment are obtained;
the analysis module stores a standard equal loudness curve, wherein the loudness level L with the frequency fNAnd sound pressure level LpThe relationship of (1) is:
wherein:
Tfis the hearing threshold in decibels; a. thefIs loudness perception power exponent; l isUIs the amplitude of the normalized linear transfer function at 1000Hz, in decibels; the values of the specific parameters are referred to GB T4963 and 2007 Acoustic Standard equal loudness level curves;
the microphone collects sound audio segments in the environment and sends the audio segments to the analysis module, the analysis module preprocesses the audio segments and then inputs the preprocessed audio segments into audio processing software to calculate the loudness level of the actual listening sensation of the audio segments, and the loudness level L of the environment sound under the actual listening sensation is obtainedN1；
The control method comprises the following specific steps:
step 1, calculating the power of a humidifier by an analysis module:
wherein k is1And k2The constant coefficient is set according to experience; p0For the base power of the humidifier D0Is prepared from flourA dust amount adjustment threshold;
step 2, calculating the ventilation volume of the fan by an analysis module:
wherein k is3To k is5The constant coefficient is set according to experience; f0Based on the ventilation, T0The threshold is adjusted for temperature.
Step 3, obtaining the angle r (v) of the fan blade according to the calculated ventilation quantity F; namely, the angle of the fan blade with fixed ventilation quantity is a function of the rotating speed of the fan;
traversing all the ranges of the allowable fan rotating speed v corresponding to the central frequency and the sound pressure level range of the fan noise of the ventilation quantity F, and substituting the sound pressure level corresponding to each central frequency into a formula (2) to calculate the loudness level of the fan noise; screening out loudness level LN2Lowest corresponding fan speed vLminAnd v isLminCalculating the fan blade angle r;
step 4, simultaneously comparing loudness level L of fan noiseN2Loudness level L with ambient soundN1Making a comparison if LN2＞LN1+ C; wherein C is a preset constant; let P' = P + P1(ii) a Wherein P is1The amount of humidifier power increase; calculating ventilation quantity, fan rotating speed and blade angle again through the step 2 and the step 3 according to the new humidifier power as the P';
step 5, repeating step 4, comparing the recalculated loudness level L of the fan noiseN2Loudness level L with ambient soundN1Up to LN2≤LN1+ C or the humidifier reaches maximum power;
and 6, controlling the humidifier, the speed reducing motor and the blade angle controller to work according to the finally obtained humidifier power, the fan rotating speed and the blade angle.
The analysis module carries out noise reduction on the audio segment in a preprocessing mode, the noise reduction mode is that the audio segment is subjected to frequency domain conversion, and then the noise frequency of the audio segment in a working state of the fan rotating speed v and the blade angle r corresponding to the fan working at the current moment is deducted from the converted frequency domain data.
Example 2:
a method for realizing feedback regulation of a fresh air system by using the equipment comprises the following steps:
a, detecting the temperature, the humidity and the dust amount of an environment by a temperature sensor, a humidity sensor and a particle sensor so as to obtain the temperature T, the humidity H and the dust amount D of the environment;
the microphone collects sound audio segments in the environment and sends the audio segments to the analysis module, the analysis module preprocesses the audio segments and then inputs the preprocessed audio segments into audio processing software to calculate the loudness level of the actual listening sensation of the audio segments, and the loudness level L of the environment sound under the actual listening sensation is obtainedN1；
Step b, calculating the power of the humidifier by an analysis module:
wherein k is1And k2The constant coefficient is set according to experience; p0For the base power of the humidifier, D0Adjusting a threshold for the dust amount;
step c, calculating the ventilation volume of the fan by the analysis module:
wherein k is3To k is5The constant coefficient is set according to experience; f0Based on the ventilation, T0The threshold is adjusted for temperature.
D, obtaining the angle r (v) of the fan blade according to the calculated ventilation quantity F; the angle of the fan blades with fixed ventilation quantity is a function of the rotating speed of the fan at the moment;
traversing all the ranges of the allowable fan rotating speed v corresponding to the central frequency and the sound pressure level range of the fan noise of the ventilation quantity F, and substituting the sound pressure level corresponding to each central frequency into a formula (2) to calculate the loudness level of the fan noise; screening out loudness level LN2Lowest time corresponding fanRotational speed vLminAnd v isLminCalculating the fan blade angle r;
step e, simultaneously comparing loudness level L of fan noiseN2Loudness level L with ambient soundN1Making a comparison if LN2＞LN1+ C; wherein C is a preset constant; let P' = P + P1(ii) a Wherein P is1The amount of humidifier power increase; and according to the P' as the new humidifier power, calculating the ventilation quantity, the fan rotating speed and the blade angle again through the steps c and d;
step f, repeating step e, comparing the recalculated loudness level L of the fan noiseN2Loudness level L with ambient soundN1Up to LN2≤LN1+ C or the humidifier reaches maximum power;
and g, controlling the humidifier, the speed reducing motor and the blade angle controller to work according to the finally obtained humidifier power, the fan rotating speed and the blade angle.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and shall cover the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (4)
1. The utility model provides a realize new trend system feedback regulation's frequency conversion gear motor equipment, includes main control unit, humidifier, gear motor, fan, blade angle controller, analysis module and a plurality of sensor, its characterized in that:
the speed reduction motor drives the fan to rotate so as to realize the operation of the fresh air system, and the blade angle controller controls the blade angle;
the main controller controls the humidifier to humidify the environment, controls the rotating speed of the accelerating motor, and controls the blade angle controller to adjust the blade angle;
the sensors comprise a microphone, a particulate matter sensor, a temperature sensor and a humidity sensor; the microphone, the particulate matter sensor, the temperature sensor and the humidity sensor are connected to the analysis module, and the analysis module is connected to the main controller; the analysis module analyzes data collected by the microphone, the particulate matter sensor, the temperature sensor and the humidity sensor, and outputs adjustment parameters of the humidifier, the speed reduction motor and the blade angle controller only through the main controller; the main controller controls the humidifier and the fan to adjust the humidity, noise and dust amount of the environment according to the adjustment parameters of the humidifier, the speed reduction motor and the blade angle controller.
2. The variable frequency speed reduction motor device for realizing the feedback regulation of the fresh air system according to claim 1, wherein:
the fan is an exhaust fan, and the analysis module stores the correlation between the fan rotating speed v and the blade angle r under the condition of ensuring the fixed ventilation quantity F; that is, the blade angle r can be calculated according to the known ventilation F and the fan rotating speed v; and the centre frequency and sound pressure level of the noise of the fan at a determined fan speed v is known;
the temperature sensor, the humidity sensor and the particle sensor are used for detecting the temperature, the humidity and the dust amount of the environment, so that the temperature T, the humidity H and the dust amount D of the environment are obtained;
the analysis module stores a standard equal loudness curve, wherein the loudness level L with the frequency fNAnd sound pressure level LpThe relationship of (c) is:
wherein:
Tfis the hearing threshold in decibels; a. thefIs loudness perception power exponent; l isUIs the amplitude in decibels for a 1000Hz normalized linear transfer function;
the microphone collects sound audio segments in the environment and sends the audio segments to the analysis module, the analysis module preprocesses the audio segments and then inputs the preprocessed audio segments into audio processing software to calculate the loudness level of the actual listening sensation of the audio segments, and the loudness level L of the environment sound under the actual listening sensation is obtainedN1；
The control method comprises the following specific steps:
step 1, calculating the power of a humidifier by an analysis module:
wherein k is1And k2The constant coefficient is set according to experience; p0For the base power of the humidifier D0Adjusting a threshold for the dust amount;
step 2, calculating the ventilation volume of the fan by an analysis module:
wherein k is3To k is5The constant coefficient is set according to experience; f0Based on the ventilation, T0Adjusting the threshold for temperature;
step 3, obtaining the angle r (v) of the fan blade according to the calculated ventilation quantity F; namely, the angle of the fan blade with fixed ventilation quantity is a function of the rotating speed of the fan;
traversing all the ranges of the allowable fan rotating speed v corresponding to the central frequency and the sound pressure level range of the fan noise of the ventilation quantity F, and substituting the sound pressure level corresponding to each central frequency into a formula (2) to calculate the loudness level of the fan noise; screening out loudness level LN2Lowest corresponding fan speed vLminAnd v isLminCalculating the angle r of the fan blade;
step 4, simultaneously comparing the loudness level L of the fan noiseN2Loudness level L with ambient soundN1Making a comparison if LN2＞LN1+ C; wherein C is a preset constant; let P' = P + P1(ii) a Wherein P is1The amount of humidifier power increase; calculating ventilation quantity, fan rotating speed and blade angle again through the step 2 and the step 3 according to the new humidifier power as the P';
step 5, repeating step 4, comparing the recalculated loudness level L of the fan noiseN2Loudness level L with ambient soundN1Up to LN2≤LN1+ C or the humidifier reaches maximum power;
and 6, controlling the humidifier, the speed reducing motor and the blade angle controller to work according to the finally obtained humidifier power, the fan rotating speed and the blade angle.
3. The variable frequency speed reduction motor device for realizing the feedback regulation of the fresh air system according to claim 2, wherein:
the analysis module carries out frequency domain conversion on the audio frequency segment in a noise reduction mode, and then deducts the noise frequency of the corresponding fan rotating speed v and the corresponding blade angle r in the working state when the fan works at the current moment from the converted frequency domain data.
4. A method of implementing feedback regulation of a fresh air system using the apparatus of claim 2 or 3, comprising:
a, detecting the temperature, the humidity and the dust amount of an environment by a temperature sensor, a humidity sensor and a particle sensor so as to obtain the temperature T, the humidity H and the dust amount D of the environment;
the microphone collects sound audio segments in the environment and sends the audio segments to the analysis module, the analysis module preprocesses the audio segments and then inputs the preprocessed audio segments into audio processing software to calculate the loudness level of the actual listening sensation of the audio segments, and the loudness of the environment sound under the actual listening sensation is obtainedStage LN1；
Step b, calculating the power of the humidifier by the analysis module:
wherein k is1And k2The constant coefficient is set according to experience; p is0For the base power of the humidifier D0Adjusting a threshold for the dust amount;
step c, calculating the ventilation volume of the fan by the analysis module:
wherein k is3To k is5The constant coefficient is set according to experience; f0Based on the ventilation, T0Adjusting a threshold for the temperature;
d, obtaining the angle r (v) of the fan blade according to the calculated ventilation quantity F; namely, the angle of the fan blade with fixed ventilation quantity is a function of the rotating speed of the fan;
traversing all the ranges of the allowable fan rotating speed v corresponding to the central frequency and the sound pressure level range of the fan noise of the ventilation quantity F, and substituting the sound pressure level corresponding to each central frequency into a formula (2) to calculate the loudness level of the fan noise; screening out loudness level LN2Lowest corresponding fan speed vLminAnd v isLminCalculating the fan blade angle r;
step e, simultaneously comparing the loudness level L of the fan noiseN2Loudness level L with ambient soundN1Making a comparison if LN2＞LN1+ C; wherein C is a preset constant; let P' = P + P1(ii) a Wherein P is1The amount of humidifier power increase; and according to the P' as the new humidifier power, calculating the ventilation quantity, the fan rotating speed and the blade angle again through the steps c and d;
step f, repeating step e, comparing the recalculated loudness level L of the fan noiseN2Loudness level L with ambient soundN1Up to LN2≤LN1+ C or the humidifier reaches maximum power;
and g, controlling the humidifier, the speed reducing motor and the blade angle controller to work according to the finally obtained humidifier power, the fan rotating speed and the blade angle.
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