CN112113299A - Control method of constant-air-volume split fresh air - Google Patents
Control method of constant-air-volume split fresh air Download PDFInfo
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- CN112113299A CN112113299A CN202010810399.5A CN202010810399A CN112113299A CN 112113299 A CN112113299 A CN 112113299A CN 202010810399 A CN202010810399 A CN 202010810399A CN 112113299 A CN112113299 A CN 112113299A
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- air
- volume
- fan
- blower
- rotating speed
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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
- 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
- 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
- F24F11/70—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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- 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
Abstract
A control method of constant air volume split fresh air comprises the following steps of (I) starting a fresh air fan, setting operation air volume, (II) calculating the ratio of fresh air volume to exhaust air volume, and (III) adjusting the rotating speed of each fan in a fresh air system according to the ratio of the fresh air volume; fourthly, the sensor checks the cleanliness of the filter screen, and if the cleanliness of the filter screen meets a set value, the air inlet fan works normally; fifthly, detecting the air intake of the air intake machine; if the set air volume is met, the fan of the fresh air normally works, and if the set air volume is not met, a signal is sent to the blower, and the rotating speed of the blower is adjusted; if the cleanliness of the filter screen does not meet the set value in the step (IV), adjusting the rotating speed of the air inlet machine and the air feeder at the same time; and (seventhly) the rotating speed of the exhaust fan is adjusted according to the proportion of the air exhaust volume, the air exhaust volume can be more accurately controlled by the control method, and the power of a fresh air system can be effectively reduced.
Description
Technical Field
The invention belongs to a fresh air volume control method, and particularly belongs to a control method of constant air volume split fresh air.
Background
The fresh air quantity requirement of the fresh air fan is usually generated by indoor personnel and buildings, the fresh air quantity requirement of part of the buildings is mainly related to the area of an air-conditioning area, and the calculation is simpler. In the existing industry, the fresh air volume design for indoor personnel demands generally adopts a sensor to estimate the maximum personnel number, and realizes the control of the fresh air volume of a fresh air fan according to the maximum personnel number.
Because the indoor personnel quantity is changed, and the difference of the arrangement positions of the related sensors and the deviation of the fresh air volume detection caused by the delay of the collected data are caused, the fresh air volume of the actual demand cannot be accurately acquired, and the problem that the fresh air volume of the fresh air fan cannot be accurately controlled according to the fresh air volume of the actual demand is caused.
Disclosure of Invention
In view of the above disadvantages, the technical problem to be solved by the present invention is to provide a control method for constant air volume split fresh air, which can control the air volume more accurately and effectively reduce the power of the fresh air system.
In order to solve the technical problems, the invention adopts the technical scheme that,
a control method of constant air volume split fresh air comprises the following steps,
starting a fresh air fan and setting the running air volume;
secondly, calculating the ratio of fresh air volume to exhaust air volume;
thirdly, adjusting the rotating speed of each fan in the fresh air system according to the ratio of the fresh air volume;
fourthly, the sensor checks the cleanliness of the filter screen, and if the cleanliness of the filter screen meets a set value, the air inlet fan works normally;
fifthly, detecting the air intake of the air intake machine; if the set air volume is met, the fan of the fresh air normally works, and if the set air volume is not met, a signal is sent to the blower, and the rotating speed of the blower is adjusted;
if the cleanliness of the filter screen does not meet the set value in the step (IV), adjusting the rotating speed of the air inlet machine and the air feeder at the same time;
and (seventhly) adjusting the rotating speed of the exhaust fan according to the proportion of the exhaust air volume.
Further, the blower in the step (three) comprises an exhaust fan, a blower and an air inlet fan.
Further, the operation of the air inlet fan in the step (three) comprises the following steps,
(3.1) automatically adjusting the rotating speed of the exhaust fan according to the ratio of the fresh air volume to the exhaust air volume;
(3.2) according to the ratio of the fresh air volume to the exhaust air volume, calculating the optimal output power of the air inlet fan and the air feeder by the operation module;
and (3.3) driving the air inlet machine and the air feeder to operate simultaneously according to the calculated output power.
Further, the air inlet fan in the step (four) comprises the following feedback step;
(4.1) moving an air inlet machine;
and (4.2) feeding back the rotating speed and the power of the air inlet machine to the operation module.
Further, the blower in the step (five) includes the following feedback steps;
(4.1) moving a blower;
and (4.2) feeding back the rotating speed and the power of the air feeder to the operation module.
Further, the step (six) also comprises the following steps,
(6.1) adjusting the rotating speed of the air inlet machine and the air feeder at the same time;
(6.2) operating the air inlet fan, and checking the air volume of the air inlet fan;
(6.3) if the set air volume is met, not adjusting the operation of the air blower;
and (6.4) if the air volume does not meet the set air volume, adjusting the operation of the blower.
Further, the blower in the step (seven) includes the following feedback steps;
(7.1) moving an exhaust fan;
and (7.2) feeding back the rotating speed and the power of the exhaust fan to the operation module.
The invention has the advantages that the total power of the air feeder and the air inlet machine can be effectively reduced by adjusting and adapting the power and the rotating speed of the air feeder and the air inlet machine, so that the power of the fresh air system is reduced, and the air inlet volume of the fresh air system can be constant.
Drawings
Fig. 1 is a flowchart of the present control method.
Detailed Description
The invention is further described below with reference to the accompanying drawings.
A control method of constant air volume split fresh air comprises the following steps,
starting a fresh air fan, and setting the operation air quantity and the ventilation frequency, wherein the operation air quantity and the ventilation frequency can be freely set according to the requirements of users;
calculating the ratio of fresh air volume to exhaust air volume, wherein the exhaust air volume can be calculated according to the room volume and the ventilation frequency as the initial setting of the operation air volume is completed in the step (one), so as to determine the ratio;
thirdly, adjusting the rotating speed of each fan (namely an exhaust fan, a blower and an air inlet fan) in the fresh air system according to the ratio of the fresh air volume, so that the air inlet volume and the air outlet volume of the fresh air system operate according to the ratio in the step (II), and a plurality of fans are adjusted simultaneously, thereby realizing linkage of the plurality of fans, reducing the operating power of the fresh air system and realizing the purposes of energy conservation and emission reduction;
the sensor checks the cleanliness of the filter screen, if the cleanliness of the filter screen meets a set value, the air inlet fan normally works, and when the cleanliness of the filter screen is higher, the filter screen has less obstruction to the air inlet quantity, so that air compensation is not needed to be performed on the air inlet fan;
fifthly, detecting the air intake of the air intake machine; if the set air volume is met, the fan of the fresh air normally works, if the set air volume is not met, a signal is sent to the blower, the rotating speed of the blower is adjusted, and the total air inlet volume is increased by adjusting the rotating speed of the blower, so that air compensation is realized, and the air outlet volume of the fresh air system is in a constant state;
if the cleanliness of the filter screen does not meet the set value in the step (IV), the rotating speed of the air inlet machine and the air feeder is adjusted at the same time, and the air inlet volume is increased by adjusting the rotating speed of the air inlet machine and the air feeder, so that the air inlet volume is the same as the set value in the step (I), and the air inlet accuracy of the fresh air system is improved;
and (seventhly) adjusting the rotating speed of the exhaust fan according to the proportion of the exhaust air volume.
The operation of the air inlet machine in the step (three) comprises the following steps,
(3.1) automatically adjusting the rotating speed of the exhaust fan according to the ratio of the fresh air volume to the exhaust air volume;
(3.2) according to the ratio of the fresh air volume to the exhaust air volume, calculating the optimal output power of the air inlet fan and the air feeder by the operation module, and realizing fan linkage by adjusting the optimal output power of the air inlet fan and the air feeder, thereby reducing the operating power of the fresh air system and reducing the energy consumption of the fresh air system;
and (3.3) driving the air inlet machine and the air feeder to operate simultaneously according to the calculated output power, and simultaneously feeding air into the room through the air inlet machine and the air feeder.
Further, the air inlet fan in the step (four) comprises the following feedback step;
(4.1) moving an air inlet machine;
(4.2) feeding back the rotating speed and the power of the air inlet machine to the operation module, wherein the rotating speed and the power of the air inlet machine can be adjusted in real time in the operation process, and the rotating speed and the power of the air inlet machine are fed back to the operation module, so that the rotating speed and the power of the air inlet machine can be adjusted adaptively, the power of the air inlet machine is reduced as far as possible, and the power of the air inlet machine is reduced and adjusted.
The blower in the step (five) comprises the following feedback steps;
(4.1) moving a blower;
(4.2) feeding back the rotating speed and the power of the air feeder to the operation module, wherein the rotating speed and the power of the air feeder can be adjusted in real time in the operation process, and the rotating speed and the power of the air feeder are fed back to the operation module, so that the rotating speed and the power of the air feeder can be adjusted adaptively, the power of the air feeder is reduced as far as possible, and the power of the air inlet machine is adjusted accordingly.
Through the feedback system, the adjusted power and rotating speed of the air feeder and the air inlet machine are adjusted and adapted again, so that the total power of the air feeder and the air inlet machine can be effectively reduced, the power of the fresh air system is reduced, and the air inlet volume of the fresh air system can be constant.
The step (six) further comprises the following steps,
(6.1) adjusting the rotating speed of an air inlet machine and an air feeder simultaneously according to the cleanliness of the filter screen, and increasing the air inlet quantity;
(6.2) operating the air inlet fan, and checking the air volume of the air inlet fan;
(6.3) if the set air volume is met, not adjusting the operation of the air blower;
and (6.4) if the air volume does not meet the set air volume, adjusting the operation of the blower.
The total air inlet volume of the fresh air system is regulated and controlled through the steps, the influence on the whole air inlet volume of the fresh air system due to the change of the cleanliness of the filter screen is prevented, the air inlet volume is kept to be the same as the initial set value, and the air outlet volume can be controlled more accurately.
The blower in the step (seven) comprises the following feedback steps;
(7.1) moving an exhaust fan;
(7.2) the rotating speed and the power of the exhaust fan are fed back to the operation module, so that the total air volume of the exhaust fan can be conveniently controlled, the exhaust air volume and the intake air volume are always in a fixed ratio, and the stability of the fresh air system is improved.
In some preferred modes, the judgment of the cleanliness of the filter screen comprises the steps of firstly, using time of the filter screen, namely assembling time of the filter screen on a fresh air fan, and secondly, detecting the cleanliness of the filter screen by a sensor, and detecting the cleanliness of the filter screen by combining service time of the filter screen and a detection result of the sensor.
The calculation formula of the operation module for the optimal output power of the air inlet machine and the air feeder is as follows,
wherein Q is1The air inlet quantity is the air inlet quantity at the air inlet machine;
P1is at atmospheric pressure;
K1the capacity coefficient of the air inlet fan motor (known according to the fan type selection);
η1the mechanical efficiency of the air inlet fan (known according to fan type selection);
r is the radius of the pipeline at the blower (known according to the pipeline at the installation position);
K2the capacity coefficient of a blower motor (known according to the fan type selection);
η2the mechanical efficiency of the blower (according to the fan selection type);
n is the total power of the air feeder and the air inlet fan;
before the fan of the fresh air system works, the air quantity Z of the whole fresh air system is set, so Q1Is in the interval of 0-Z, according to the above-mentioned total power equation, the lowest value of N is solved in the unitary cubic equation, and Q corresponding to the lowest value of N1The value is the optimum power point of the air inlet machine, and the set air volume value is fixed, so the optimum power point of the air feeder can be obtained, the mutual coordination adjustment of the air feeder and the air inlet machine is realized, and the whole power is reduced.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention; thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Although the terms corresponding to the reference numerals in the figures are used more herein, the possibility of using other terms is not excluded; these terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.
Claims (8)
1. A control method of constant air volume split fresh air is characterized by comprising the following steps,
starting a fresh air fan and setting the running air volume;
secondly, calculating the ratio of fresh air volume to exhaust air volume;
thirdly, adjusting the rotating speed of each fan in the fresh air system according to the ratio of the fresh air volume;
fourthly, the sensor checks the cleanliness of the filter screen, and if the cleanliness of the filter screen meets a set value, the air inlet fan works normally;
fifthly, detecting the air intake of the air intake machine; if the set air volume is met, the fan of the fresh air normally works, and if the set air volume is not met, a signal is sent to the blower, and the rotating speed of the blower is adjusted;
if the cleanliness of the filter screen does not meet the set value in the step (IV), adjusting the rotating speed of the air inlet machine and the air feeder at the same time;
and (seventhly) adjusting the rotating speed of the exhaust fan according to the proportion of the exhaust air volume.
2. The method as claimed in claim 1, wherein the blower in step (III) includes an exhaust blower, a blower and an air inlet blower.
3. The method for controlling the constant-air-volume split fresh air according to claim 2, wherein the operation of the air inlet fan in the step (three) comprises the following steps,
(3.1) automatically adjusting the rotating speed of the exhaust fan according to the ratio of the fresh air volume to the exhaust air volume;
(3.2) calculating the optimal output power of the air inlet fan and the air feeder according to the ratio of the fresh air volume to the air exhaust volume;
and (3.3) driving the air inlet machine and the air feeder to operate simultaneously according to the calculated output power.
4. The method for controlling the constant-air-volume split fresh air according to claim 1, wherein the air inlet fan in the step (four) comprises the following feedback steps;
(4.1) moving an air inlet machine;
and (4.2) feeding back the rotating speed and the power of the air inlet machine.
5. The method for controlling the constant-air-volume split fresh air according to claim 1, wherein the blower in the step (five) comprises the following feedback steps;
(4.1) moving a blower;
and (4.2) feeding back the rotating speed and the power of the air blower.
6. The method for controlling the constant-air-volume split fresh air according to claim 1, wherein the sixth step further comprises the following steps,
(6.1) adjusting the rotating speed of the air inlet machine and the air feeder at the same time;
(6.2) operating the air inlet fan, and checking the air volume of the air inlet fan;
(6.3) if the set air volume is met, not adjusting the operation of the air blower;
and (6.4) if the air volume does not meet the set air volume, adjusting the operation of the blower.
7. The method for controlling the constant-air-volume split fresh air according to claim 1, wherein the blower in the seventh step comprises the following feedback steps;
(7.1) moving an exhaust fan;
and (7.2) feeding back the rotating speed and the power of the exhaust fan.
8. The method for controlling the constant-air-volume split fresh air as claimed in claim 3, wherein the air is suppliedThe optimal output power of the machine and the blower is calculated by the formula,
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010810399.5A CN112113299A (en) | 2020-08-13 | 2020-08-13 | Control method of constant-air-volume split fresh air |
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| CN202010810399.5A CN112113299A (en) | 2020-08-13 | 2020-08-13 | Control method of constant-air-volume split fresh air |
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004177063A (en) * | 2002-11-29 | 2004-06-24 | Hitachi Home & Life Solutions Inc | Air conditioner |
| US20150093984A1 (en) * | 2004-12-07 | 2015-04-02 | Trane International Inc. | Ventilation Controller |
| CN106051995A (en) * | 2016-08-02 | 2016-10-26 | 北京福兆朗风科技有限公司 | Indoor fresh air purifying device and control method thereof |
| CN106545962A (en) * | 2016-10-31 | 2017-03-29 | 北京艾瑞克林科技有限公司 | A kind of control method of new blower fan and its air output and exhaust air rate |
| CN106958908A (en) * | 2017-02-24 | 2017-07-18 | 珀隆有限公司 | VMC and its air quantity control method and device |
| CN107525235A (en) * | 2017-08-17 | 2017-12-29 | 珠海福士得冷气工程有限公司 | Zhongting and neighboring area air conditioning terminal intelligent control method |
| CN208983554U (en) * | 2018-09-28 | 2019-06-14 | 浙江欧伦电气有限公司 | A kind of new blower permanent wind amount structure |
-
2020
- 2020-08-13 CN CN202010810399.5A patent/CN112113299A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004177063A (en) * | 2002-11-29 | 2004-06-24 | Hitachi Home & Life Solutions Inc | Air conditioner |
| US20150093984A1 (en) * | 2004-12-07 | 2015-04-02 | Trane International Inc. | Ventilation Controller |
| CN106051995A (en) * | 2016-08-02 | 2016-10-26 | 北京福兆朗风科技有限公司 | Indoor fresh air purifying device and control method thereof |
| CN106545962A (en) * | 2016-10-31 | 2017-03-29 | 北京艾瑞克林科技有限公司 | A kind of control method of new blower fan and its air output and exhaust air rate |
| CN106958908A (en) * | 2017-02-24 | 2017-07-18 | 珀隆有限公司 | VMC and its air quantity control method and device |
| CN107525235A (en) * | 2017-08-17 | 2017-12-29 | 珠海福士得冷气工程有限公司 | Zhongting and neighboring area air conditioning terminal intelligent control method |
| CN208983554U (en) * | 2018-09-28 | 2019-06-14 | 浙江欧伦电气有限公司 | A kind of new blower permanent wind amount structure |
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