CN108534311A - A kind of fresh air adjusting method based on air fine particles - Google Patents

Abstract

The invention discloses a kind of fresh air adjusting method based on air fine particles, includes the following steps：S1：Default relevant parameter；S2：CO in collection room₂Concentration A；S3：Judge interior CO₂Concentration A and default CO₂Upper limit of concentration M, if A>M thens follow the steps S9, otherwise executes S4；S4：PM2.5 concentration B in collection room；S5：Interior PM2.5 concentration B and default PM2.5 upper limit of concentration m is judged, if B>M then executes S9, otherwise executes S6；S6：Interior PM2.5 concentration B and default PM2.5 concentration limits n is judged, if B<N then executes S8, otherwise executes S7；S7：Output frequency P (B)=(B n)/(m n) * (E F)+F, operation S1 S6；S8：Output frequency P (B)=F, operation S1 S6；S9：Output frequency P (B)=E, operation S1 S6.The invention enables indoor air qualities to reach good result, also significantly reduces the operation power consumption of aeration device.

Description

A new air conditioning method based on air fine particles

technical field

The invention relates to the technical field of intelligent control of ventilation systems, and more specifically, relates to a method for regulating fresh air based on air fine particles.

Background technique

In recent years, smog has had a huge impact on the daily life of large cities. The control of indoor PM2.5, especially in large public spaces (such as large shopping malls, high-end office buildings, hospitals, schools, etc.), has become an important task for major property managers to work together. For large public buildings, intake of sufficient fresh air from the outside is an important indicator to ensure indoor comfort and health under the premise of national regulations. In this context, the introduction of a large amount of fresh air after high-efficiency filtration and the substantial increase in energy consumption costs of the central air-conditioning system form a contradiction. PM2.5 refers to fine particulate matter in the air.

Simply considering the purification of indoor air in a large space or the control of the terminal air system, both are relatively mature and have been practically applied in many projects. However, if you run from one side, you will sacrifice the other. For example: to purify the indoor air quality as much as possible and ensure the PM2.5 concentration, it is necessary to increase the circulation volume of the terminal air system and form a slight positive pressure indoors to resist the intrusion of external pollution sources with clean fresh air. However, if the energy-saving operation of the terminal air system is blindly pursued, the circulating air volume in a large space will be significantly reduced, resulting in the inability to effectively purify indoor pollution sources (including PM2.5 particles). Therefore, it is particularly important to effectively combine indoor air quality with energy-saving operation of the wind system to achieve a balance between indoor air quality and energy-saving operation, and it also solves an important pain point in the current industry.

Contents of the invention

In view of this, the present invention provides a fresh air adjustment method based on air fine particles to solve the above-mentioned defects.

To achieve the above object, the present invention provides the following technical solutions:

A fresh air conditioning method based on air fine particles, comprising the following steps:

S1: Preset the upper limit M and lower limit N of indoor _CO2 concentration, the upper limit m and lower limit n of indoor PM2.5 concentration, the upper limit E and lower limit F of the working frequency of the air purifier;

S2: Collect the real-time value of indoor CO ₂ concentration A;

S3: Determine whether the indoor CO ₂ concentration A is greater than the preset indoor CO ₂ concentration upper limit M; if the indoor CO ₂ concentration A is greater than the preset indoor CO ₂ concentration upper limit M, then perform step S9; if the indoor CO ₂ concentration A is not greater than preset indoor _{CO2concentration} upper limit M, then execute step S4;

S4: Collect the real-time value of indoor PM2.5 concentration B;

S5: Determine whether the indoor PM2.5 concentration B is greater than the preset indoor PM2.5 concentration upper limit m; if the indoor PM2.5 concentration B is greater than the preset indoor PM2.5 concentration upper limit m, then perform step S9; if the indoor PM2. 5 concentration B is not greater than the preset indoor PM2.5 concentration upper limit m, then execute step S6;

S6: Determine whether the indoor PM2.5 concentration B is less than the preset indoor PM2.5 concentration lower limit n; if the indoor PM2.5 concentration B is less than the preset indoor PM2.5 concentration lower limit n, then perform step S8; if the indoor PM2. 5 concentration B is not less than the preset indoor PM2.5 concentration lower limit n, then execute step S7;

S7: Output operating frequency P(B)=(B-n)/(m-n)*(E-F)+F, repeat operation steps S1-S6;

S8: Output operating frequency P(B)=F, repeat operation steps S1-S6;

S9: Output the operating frequency P(B)=E, and repeat the steps S1-S6.

As a preferred solution of the present invention, the real-time value of the indoor _CO2 concentration A is collected by several _CO2 sensors fixedly placed in the room and uploaded to the PLC controller.

As a preferred solution of the present invention, the real-time value of the indoor PM2.5 concentration B is collected by several PM2.5 sensors fixedly placed in the room and uploaded to the PLC controller.

As can be seen from the above-mentioned technical scheme, the beneficial effect of the present _invention is: this method adopts the strategy of gathering the real-time numerical value of indoor _PM2 . No higher than the preset upper limit value, and then determine the operating frequency of the air purifier according to the indoor PM2.5 concentration, and use different indoor PM2.5 concentrations to control different operating frequencies of the air purifier, so that the indoor CO ₂ concentration and PM2. 5 concentrations are kept within a certain range; therefore, the present invention integrates the characteristics of indoor air quality and wind system energy-saving operation to achieve the optimal wind system operation control mode under different external and internal environments, which can not only make the indoor The air quality has achieved good results, and the operating power consumption of the fresh air device has also been significantly reduced. The energy-saving rate of about 40% has been achieved throughout the year, effectively meeting the energy-saving operation requirements of the fresh air device.

Description of drawings

The accompanying drawings are used to provide a further understanding of the present invention, and constitute a part of the description, and are used together with the embodiments of the present invention to explain the present invention, and do not constitute a limitation to the present invention. In the attached picture:

Fig. 1 is a flow chart of a method for regulating fresh air based on air fine particulate matter provided by an embodiment of the present invention.

Fig. 2 is a four-quadrant interpolation control strategy diagram provided by an embodiment of the present invention.

Fig. 3 is a diagram of the experimental work process provided by the embodiment of the present invention.

FIG. 4 is a structural diagram of an actual application provided by an embodiment of the present invention.

Fig. 5 is a cross-sectional view of the structure of the air cleaner in Fig. 4 .

In the figure: 1-PLC controller; 2-PM2.5 detection unit; 3-CO ₂ detection unit; 4-air purifier; 11-communication unit; 111-offline communication module; 112-networking communication module; 12-master Control unit; 13-data storage unit; 401-fresh air inlet; 402-fresh air chamber; 403-primary purification chamber; 404-secondary purification chamber; 405-electrode plate; 406-accommodation chamber; Export.

Detailed ways

As shown in FIGS. 1-5 , an embodiment of the present invention provides a method for regulating fresh air based on air fine particles.

A fresh air conditioning method based on air fine particles, comprising the following steps:

S1: Preset the upper limit M and lower limit N of indoor _CO2 concentration, the upper limit m and lower limit n of indoor PM2.5 concentration, the upper limit E and lower limit F of the working frequency of the air purifier;

S2: collect the real-time value of the indoor _CO2 concentration A; the real-time value of the indoor _CO2 concentration A is collected by several _CO2 sensors fixed in the room and uploaded to the PLC controller;

S3: Determine whether the indoor CO ₂ concentration A is greater than the preset indoor CO ₂ concentration upper limit M; if the indoor CO ₂ concentration A is greater than the preset indoor CO ₂ concentration upper limit M, then perform step S9; if the indoor CO ₂ concentration A is not greater than preset indoor _{CO2concentration} upper limit M, then execute step S4;

S4: collect the real-time value of the indoor PM2.5 concentration B; the real-time value of the indoor PM2.5 concentration B is collected by several _CO2 sensors fixedly placed in the room and uploaded to the PLC controller;

S5: Determine whether the indoor PM2.5 concentration B is greater than the preset indoor PM2.5 concentration upper limit m; if the indoor PM2.5 concentration B is greater than the preset indoor PM2.5 concentration upper limit m, then perform step S9; if the indoor PM2. 5 concentration B is not greater than the preset indoor PM2.5 concentration upper limit m, then execute step S6;

S6: Determine whether the indoor PM2.5 concentration B is less than the preset indoor PM2.5 concentration lower limit n; if the indoor PM2.5 concentration B is less than the preset indoor PM2.5 concentration lower limit n, then perform step S8; if the indoor PM2. 5 concentration B is not less than the preset indoor PM2.5 concentration lower limit n, then execute step S7;

S7: Output operating frequency P(B)=(B-n)/(m-n)*(E-F)+F, repeat operation steps S1-S6;

S8: Output operating frequency P(B)=F, repeat operation steps S1-S6;

S9: Output the operating frequency P(B)=E, and repeat the steps S1-S6.

This method adopts the strategy of first collecting the real-time value of the indoor _CO2 concentration A and then collecting the real-time value of the indoor PM2.5 concentration B to ensure that the indoor _CO2 concentration is not higher than the preset upper limit value, and then according to the indoor PM2.5 concentration Determine the operating frequency of the air purifier, utilize different indoor PM2.5 concentrations to control the different operating frequencies of the air purifier, so that indoor CO Concentration and _PM2.5 concentration all remain within a certain range; therefore, the present invention integrates indoor air The characteristics of quality and energy-saving operation of the air system achieve the optimal operation control mode of the air system under different external and internal environments, which can not only make the indoor air quality achieve good results, but also significantly reduce the operating power of the fresh air device. The annual energy saving rate of about 40% has been realized, effectively meeting the energy-saving operation requirements of the fresh air device.

In this embodiment, the purpose of adopting the strategy of first collecting the real-time value of the indoor _CO2 concentration A and then collecting the real-time value of the indoor PM2.5 concentration B is to first judge whether the indoor _CO2 concentration A is higher than the preset upper limit, if it is higher Preset the upper limit, then directly execute step S9; if it is not higher than the preset upper limit, then execute step S4; through this strategy, it can effectively ensure that the indoor _CO2 concentration is not higher than the preset upper limit, avoiding indoor If the _CO2 concentration is too high, it will affect the overall operation of the device, improve the comfort of indoor personnel, and at the same time ensure that the indoor air is fresh; if the strategy of simultaneously collecting real-time values of indoor _CO2 concentration A and indoor PM2.5 concentration B is adopted , on the one hand, it will increase the amount of logical operation of the device, on the other hand, due to the real-time value of the indoor PM2.5 concentration B, it will affect the logical operation judgment of the device; increase the system error; The fluctuation of the numerical value is small, but the real-time value of the indoor _CO2 concentration A fluctuates greatly due to personnel breathing. If the strategy of simultaneously collecting the real-time value of the indoor _CO2 concentration A and the real-time value of the indoor PM2. The indoor CO2 concentration A timely adjusts the operating frequency of the device, which reduces the working efficiency of the device.

In step S7, the basis for operating frequency P(B)=(Bn)/(mn)*(EF)+F is: on the one hand, when the indoor _CO2 concentration A is less than the preset _CO2 concentration lower limit N, and After the indoor PM2.5 concentration B is between the preset PM2.5 concentration upper limit m and lower limit n, at this time, the focus is on how to adjust the fan frequency so that the indoor PM2.5 concentration is as low as possible and the energy consumption is the lowest. The invention deliberately uses the logic control relationship between the indoor PM2.5 concentration B and the preset PM2.5 concentration upper limit m and lower limit n to first calculate the real-time PM2.5 concentration B and the preset PM2.5 concentration lower limit n The actual gap, and find the ratio of the actual gap between the upper limit m and the lower limit n of the preset PM2.5 concentration, and then multiply the difference between the upper limit E and the lower limit F of the actual air purifier's operating frequency value, and finally add the lower limit F to get the real-time operating frequency of the air purifier; the present invention uses the real-time PM2. The frequency numerical ratio, finally add the rated lower limit frequency to get the real-time operating frequency of the air purifier; therefore, in this embodiment, the real-time operating frequency P (B) of the air purifier and the real-time PM2.5 concentration B In a proportional linear relationship, the real-time operating frequency P(B) of the air purifier increases with the increase of the real-time PM2.5 concentration B, and decreases with the decrease of the real-time PM2.5 concentration B, thus effectively achieving energy saving purpose of emission reduction. Similarly, on the other hand, when the indoor _CO2 concentration A is between the preset _CO2 concentration upper limit M and the lower limit N, and the indoor PM2.5 concentration B is between the preset PM2.5 concentration upper limit m and lower limit n After that, at this time, the focus is on how to adjust the fan frequency so that the indoor PM2.5 concentration is as small as possible and the energy consumption is the lowest. The present invention deliberately uses the indoor PM2.5 concentration B and the preset PM2.5 concentration upper limit m The logical control relationship between the real-time PM2.5 concentration B and the preset PM2.5 concentration lower limit n, and the actual difference between the preset PM2.5 concentration upper limit The ratio between m and the lower limit n is then multiplied by the difference between the upper limit E of the operating frequency of the actual air cleaner and the lower limit F, and finally the lower limit F can be added to obtain the real-time operating frequency of the air cleaner; Use the real-time PM2.5 concentration B to find the relative ratio of the preset gap, and then use the rated upper and lower limit frequency difference to find the frequency value ratio that needs to be increased, and finally add the rated lower limit frequency to get the real-time air purifier. Operating frequency; therefore, in the present embodiment, the real-time operating frequency P (B) of the air cleaner is directly proportional to the real-time PM2.5 concentration B, and the real-time operating frequency P (B) of the air cleaner is proportional to The increase of the PM2.5 concentration B increases, and decreases with the decrease of the real-time PM2.5 concentration B, so as to effectively achieve the purpose of energy saving and emission reduction. When the PM2.5 concentration B is less than the preset indoor PM2.5 concentration lower limit n, the focus is to reduce the amount of air renewal as much as possible and reduce energy consumption. Therefore, at this time, it is only necessary to set the real-time operating frequency P(B) Just keep it running at the lowest frequency. When the PM2.5 concentration B is greater than the preset indoor PM2.5 concentration upper limit m, the focus is to increase the amount of air renewal as much as possible. Therefore, it is necessary to maintain the real-time operating frequency P(B) of the air purifier at the highest operating frequency .

This embodiment is the most effective mitigation technical means by combining indoor PM2.5 concentration, _CO2 concentration and fresh air unit joint control means. The difficulty in the practical application of this technology is based on the four-quadrant interpolation control strategy based on indoor PM2.5 concentration and indoor _CO2 concentration, as shown in Figure 2: different indoor air quality states represented in different quadrants are given. The fresh air system operates logically, and uses frequency conversion technology for real-time tracking and adjustment. The actual operation case proves that the energy-saving effect of this technology is obvious, and the average annual energy consumption cost can be saved by more than 40%.

In order to understand and use this method more conveniently, as shown in Figure 4-5, the present invention also includes PLC controller 1, PM2.5 detection unit 2, _CO Detecting unit 3, air purifier 4; Respectively with PM2.5 detection unit 2, _CO2 detection unit 3 and air purifier 4 are electrically connected; the PLC controller 1 includes a communication unit 11, a main control unit 12 and a data storage unit 13; the communication unit 11 For sending and receiving data information, the data storage unit 13 is used to save data information and control function information, and the main control unit 12 is used to analyze data information and control the operation of the device; the control terminals of the main control unit 12 are respectively connected to the The communication unit 11 is electrically connected with the data storage unit 13; the PM2.5 detection unit 2 is a plurality of PM2.5 sensors fixedly placed indoors; the PM2.5 detection unit 2 is used to collect the indoor PM2.5 concentration data, and transmit the data to the PLC controller 1; the _CO detection unit 3 is several _CO sensors fixedly placed in the room; the _CO detection unit 3 is used to collect indoor _CO concentration data, And transmit the data to the PLC controller 1; the air cleaner 4 is used to receive control information, adjust the working frequency of the fan, and control the intake of fresh air. In the embodiment of the present invention, what described PLC controller 1 adopts is the controller of PLC200 model of Siemens, and the user can select the controller of different models according to actual needs, as long as can play a control role, and, described PLC The main control unit 12 and the data storage unit 13 in the controller 1 are one of the components of the controller of the PLC200 model in the prior art, and the difference is that the control function information is also stored in the data storage unit 13, so The main control unit 12 can call the control function information in the data storage unit 13, and control the operating frequency of the air cleaner 4 in time according to the relative ratio of the indoor PM2.5 concentration data and the _CO2 concentration data; the PM2.5 The detection unit 2 adopts the PM2.5 sensor in the prior art, and its main function is to collect the indoor PM2.5 concentration, and upload the indoor PM2.5 concentration information to the PLC controller 1 through the communication unit 11 . Similarly, the _CO2 detection unit 3 uses the _CO2 sensor in the prior art, its main function is to collect the _CO2 concentration in the room, and upload the _CO2 concentration information in the room to the PLC controller through the communication unit 11 1 in. More specifically, the communication unit 11 includes an offline communication module 111 and a networking communication module 112, the offline communication module 111 is electrically connected to the main control unit 12, and is used for offline real-time collection of display data by the main control module to provide communication service; the networked communication module 112 is electrically connected to the main control unit 12, and is used to provide communication services for the main control module to collect and display data in real time; the offline communication module 111 is a WiFi docking device; the networked communication module 112 is a GPS Network communication server.

As shown in Figure 5, specifically, the inner chamber of the air cleaner 4 is provided with a fresh air chamber 402, a primary purification chamber 403, a secondary purification chamber 404, and an accommodating chamber 406 from left to right; the fresh air chamber 402 The air inlet is communicated with the outside air through the fresh air inlet 401; the air inlet of the primary purification chamber 403 is communicated with the air outlet of the fresh air chamber 402; the air inlet of the secondary purification chamber 404 is communicated with the air outlet of the primary purification chamber 403; The air inlet of the accommodation chamber 406 communicates with the air outlet of the secondary purification chamber 404, and the air outlet of the accommodation chamber 406 communicates with the outdoor air through the fresh air outlet 408; the primary purification chamber 403 is filled with filter glass wool; the air purification The device 4 also includes an electrode plate 405; the electrode plate 405 is fixed in the secondary purification chamber 404, and is electrically connected with the PLC controller 1 for forming an electric field, ionizing and adsorbing particulate matter; the air cleaner 4 also includes Frequency conversion motor 407; the frequency conversion motor 407 is fixed in the accommodating chamber 406, the air inlet of the frequency conversion motor 407 communicates with the air outlet of the secondary purification chamber 404, and its air outlet communicates with the outside air through the fresh air outlet 408. In the embodiment of the present invention, the air purifier 4 includes a housing; the left side of the housing is provided with a fresh air inlet 401, and the right side is provided with a fresh air outlet 408, and its inner chamber is connected with a fresh air outlet 408 through pipelines from left to right. chamber 402, primary purification chamber 403, secondary purification chamber 404, and accommodating chamber 406; the primary purification chamber 403 is completely filled with glass wool for physical isolation and isolation of large particles. Of course, in practical applications, users can According to actual needs, the primary purification chamber 403 is filled with other physical barriers, which mainly function to isolate large particles. The variable frequency motor 407 is a controllable servo motor in the prior art, its power supply end is electrically connected to the power output end of the PLC controller 1, and its control end is electrically connected to the control end of the PLC controller 1 for master students. Connection; the electrode plate 405 is fixed in the secondary purification chamber 404, and the positive and negative power supply ends of the electrode plate 405 are electrically connected with the power output end of the PLC controller 1 respectively, so that the electrode plate 405 is energized to generate an electric field, and the air All the particles in the battery are ionized and charged, and then under the action of the electric field of like-sucking and opposite-sex repelling, all the charged particles are adsorbed on the electrode plate 405 to be removed; therefore, the outside air enters the air purifier 4, and then The large particles are isolated through the primary purification chamber 403, and then the tiny particles are isolated through the secondary purification chamber 404, and finally discharged into the room through the frequency conversion motor 407. After the secondary isolation of the outdoor air through the primary purification chamber 403 and the secondary purification chamber 404, the particulate matter in the air can be effectively eliminated, the PM2.5 concentration of the indoor air can be reduced, and the defect of poor air purification effect in the prior art is overcome. To achieve the purpose of purifying indoor air. The working process of the air purifier 4 is that the power supply is turned on, and the electrode plate 405 works under the power output of the PLC controller 1 to generate an electric field in the secondary purification chamber 404; then the main control unit 12 utilizes the communication unit 11 Send a control command to the variable frequency motor 407, the variable frequency motor 407 starts to work under the control command, and the outdoor fresh air enters the fresh air chamber 402 from the fresh air inlet 401 under the exhaust effect of the variable frequency motor 407, and passes through the primary purification chamber 403 in sequence and the secondary purification chamber 404, and finally enter the room through the fresh air outlet 408, thereby achieving the purpose of purifying the indoor air.

More specifically, the control function in the PLC controller 1 is

Among them, A is the _CO2 concentration, B is the PM2.5 concentration, N is the preset indoor _CO2 concentration lower limit constant, M is the preset indoor _CO2 concentration upper limit constant, n is the preset indoor PM2.5 concentration lower limit Constant, m is the preset indoor PM2.5 concentration upper limit constant, E is the upper limit of the working frequency of the air purifier, F is the lower limit of the working frequency of the air purifier, and P(B) is the working frequency of the fan of the air purifier. In the embodiment of the present invention, the PLC controller 1 collects indoor PM2.5 concentration data and _CO2 concentration data through the PM2.5 detection unit 2 and the _CO2 detection unit 3, and then according to the control function, utilizes the PLC controller 1 The built-in logic operation block performs calculations to obtain a signal for controlling the working frequency of the air purifier 4, and uses the signal for controlling the working frequency of the air purifier 4 to control the work of the air purifier 4, thereby achieving the purpose of coordinating and controlling the purification of indoor air.

The working process of the embodiment of the present invention is: the main control unit 12 uses the communication unit 11 to send data acquisition commands to the PM2.5 detection unit 2 and the _CO2 detection unit 3; the PM2.5 detection unit 2 collects indoor PM2.5 concentration data and use the communication unit 11 to transmit the PM2.5 concentration data to the main control unit 12, the _CO2 detection unit 3 collects indoor _CO2 concentration data and uses the communication unit 11 to transmit the _CO2 concentration data to the main control unit 12 In; the main control unit 12 calls the control function in the data storage unit 13, and combines the PM2.5 concentration data and _CO2 concentration data into the control function to calculate the control signal, and use the communication unit 11 to send to the air In the purifier 4; the air purifier 4 receives the control signal and adjusts the working frequency of the fan.

The experimental working principle diagram of the embodiment of the present invention is shown in Figure 3: the indoor _CO2 concentration is set to be relatively quantitative, with 600ppm and 1000ppm as the upper and lower limits. In addition, 600ppm and 1000ppm correspond to the frequency upper and lower limits of the inverter, which are 25Hz and 50Hz respectively; set the upper and lower limits of the PM2.5 concentration, which are 45μg/m ³ and 75μg/m ³ respectively, and correspond to the frequency of the inverter. The lower limit is 25Hz and 50Hz respectively; as can be seen from FIG. 3 : the main control unit 12 first collects and reads the indoor _CO2 concentration data A through the _CO2 detection unit 3. If the indoor _CO2 concentration data A is greater than 1000, Then output the signal for controlling the 50HZ operating frequency of the air cleaner 4, and use the communication unit 11 to send this signal to the control terminal of the air cleaner 4, and adjust the operating frequency of the air cleaner 4 to reach _50HZ in time; If the data A is between 600-1000, the indoor PM2.5 concentration data B is collected and read through the PM2.5 detection unit 2, if the indoor PM2.5 concentration data B is greater than 75, that is, 600<A<1000 and B>75 , then output the signal to control the 50HZ working frequency of the air cleaner 4, and use the communication unit 11 to send this signal to the control terminal of the air cleaner 4, and adjust the working frequency of the air cleaner 4 to 50HZ in time; if the indoor PM2. 5. If the concentration data B is between 45 and 75, that is, 600<A<1000 and 45<B<75, then the signal for controlling the working frequency of (B-45)*25/30+25Hz of the air purifier 4 will be output, which will be used The communication unit 11 sends this signal to the control terminal of the air cleaner 4, and timely adjusts the operating frequency of the air cleaner 4 to reach (B-45)*25/30+25Hz; if 600<A<1000 and 45>B, Then output the signal to control the 25HZ operating frequency of the air cleaner 4, and use the communication unit 11 to send this signal to the control terminal of the air cleaner 4, and adjust the operating frequency of the air cleaner 4 to 25HZ in time; if 600>A and B>75, then output the signal that controls the 50HZ operating frequency of the air cleaner 4, and will utilize the communication unit 11 to send this signal to the control end of the air cleaner 4, and adjust the operating frequency of the air cleaner 4 to 50HZ in time; 600>A and 45<B<75, then output the signal of (B-45)*25/30+25Hz operating frequency to control the air cleaner 4, and use the communication unit 11 to send this signal to the control of the air cleaner 4 On the end, adjust the working frequency of the air purifier 4 in time to reach (B-45)*25/30+25Hz; if 600<A and B<45, then output a signal to control the 25HZ working frequency of the air purifier 4, and use The communication unit 11 sends this signal to the control terminal of the air cleaner 4, and adjusts the working frequency of the air cleaner 4 to 25HZ in time.

Obviously, in the embodiment of the present invention, the fresh air regulating device uses the PM2.5 detection unit 2 and the _CO2 detection unit 3 to collect indoor PM2.5 concentration data and _CO2 concentration data, and uses the main control unit 12 to retrieve the data storage unit 13 The control function in and combined with the PM2.5 concentration data and _CO2 concentration data to obtain the control signal, through the communication unit 11 to control and adjust the fan operating frequency in the air cleaner 4, so that the air cleaner 4 can be based on the indoor PM2.5 concentration data and The relative proportion of CO ₂ concentration data controls the working frequency in time, so as to achieve the purpose of effectively coordinating the control of indoor fresh air intake and PM2.5 concentration. The invention integrates the characteristics of indoor air quality and energy-saving operation of the wind system to achieve the optimal wind system operation control mode under different external and internal environments, which can not only make the indoor air quality achieve good results, but also significantly reduce The operating power consumption of the fresh air device has achieved an energy-saving rate of about 40% throughout the year, effectively meeting the energy-saving operation requirements of the fresh air device.

The above description of the disclosed embodiments enables those skilled in the art to implement or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not be limited to the embodiments shown herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims (3)

1. a kind of fresh air adjusting method based on air fine particles, which is characterized in that include the following steps：

S1：Default interior CO₂Upper limit of concentration M and lower limit N, indoor PM2.5 upper limit of concentration m and lower limit n, the work of air purifier Upper frequency limit E and lower limit F；

S2：CO in collection room₂The real time value of concentration A；

S3：Judge interior CO₂Whether concentration A is more than preset interior CO₂Upper limit of concentration M；If interior CO₂Concentration A is more than preset Indoor CO₂Upper limit of concentration M, thens follow the steps S9；If interior CO₂Concentration A is not more than preset interior CO₂Upper limit of concentration M, then hold Row step S4；

S4：The real time value of PM2.5 concentration B in collection room；

S5：Judge whether interior PM2.5 concentration B is more than preset interior PM2.5 upper limit of concentration m；If interior PM2.5 concentration B is big In preset interior PM2.5 upper limit of concentration m, S9 is thened follow the steps；If interior PM2.5 concentration B is not more than preset interior PM2.5 Upper limit of concentration m, thens follow the steps S6；

S6：Judge whether interior PM2.5 concentration B is less than preset interior PM2.5 concentration limits n；If interior PM2.5 concentration B is small In preset interior PM2.5 concentration limit n, S8 is thened follow the steps；If interior PM2.5 concentration B is not less than preset interior PM2.5 Concentration limit n, thens follow the steps S7；

S7：Export running frequency P (B)=(B-n)/(m-n) * (E-F)+F, the step that reruns S1-S6；

S8：Export running frequency P (B)=F, the step that reruns S1-S6；

S9：Export running frequency P (B)=E, the step that reruns S1-S6.

2. a kind of fresh air adjusting method based on air fine particles according to claim 1, it is characterised in that：Indoor CO₂ The real time value of concentration A is several CO by fixed placement indoors₂Sensor is acquired and is uploaded in PLC controller.

3. a kind of fresh air adjusting method based on air fine particles according to claim 1, it is characterised in that：It is indoor The real time value of PM2.5 concentration B is that PLC controls are acquired and uploaded to by several PM2.5 sensors of fixed placement indoors In device processed.