CN107014040B - Fresh air system for realizing intelligent operation and operation method thereof - Google Patents

Abstract

The invention discloses a kind of fresh air system for realizing intelligent operation and its operation method, sampling module, computing module, optimization module to be sequentially connected, and optimization module is connect with relay；Single chip computer automatic control system includes single-chip microcontroller, single-chip microcontroller respectively with PM2.5 sensor, TVOC sensor, CO₂Sensor, human inductor, display, relay connection；Tele-control system includes wifi module, wifi module and wireless router communication connection, and wireless router is connect by internet and mobile phone app communication connection, wifi module with single machine piece by internet and mobile base station communication connection, mobile base station；Relay is connect by A.C. contactor with fresh air system；Adaptive optimization timing system and single chip computer automatic control system are connect by same microcomputer with control panel.Solve the problems, such as that existing fresh air system energy consumption is high, the comfort of room air is poor, long operational time.

Description

Fresh air system for realizing intelligent operation and operation method thereof

technical field

The invention belongs to the technical field of fresh air systems, and relates to a fresh air system for realizing intelligent operation and an operation method thereof, in particular to an intelligent operation fresh air system with a heat recovery device and a purification device and an operation method thereof.

Background technique

With the frequent occurrence of haze weather with heavy pollution and long duration and wide range of influence in my country in recent years, it has aroused widespread concern about air quality. Nowadays, people spend more than 80% of their time indoors, and the deterioration of indoor air quality will not only reduce people's work efficiency, but also seriously endanger human health in the long run. In order to improve indoor air quality, at present, air purifiers are generally used to improve indoor air quality, but the air purifiers used need to be in a closed environment for a long time. People will have symptoms such as palpitation and shortness of breath, and it is difficult to meet the comfort requirements of the human body, especially those with newborn babies, families with asthma and heart disease, and people in high-end communities. Good indoor air quality should not only meet the known pollutants that do not meet the harmful substance concentration index determined by the authority, but also meet the requirements of human comfort.

The fresh air system reduces the indoor carbon dioxide concentration through ventilation, thereby meeting the requirements of human comfort, and the continuous operation of the fresh air system will inevitably increase the energy consumption of the building. How to solve the contradiction between the two is the most important problem faced by HVAC professionals. The existing fresh air system operates continuously 24 hours a day and continuously feeds fresh air into the room to discharge exhaust gas, which ensures the indoor air quality and meets the requirements of human comfort. However, with the deterioration of outdoor air quality, the burden on the purification device of the fresh air system has increased, and the fresh air system has to enhance the purification effect, resulting in an increase in the number of layers and functions of the filter screen. Although the high-voltage electrostatic adsorption technology in the air purification technology has the advantages of small resistance and good particle removal effect, it has a certain energy-saving effect in reducing the energy consumption of the fresh air system, but the energy-saving effect is not obvious. With the widespread promotion of green buildings, people pay more and more attention to building energy efficiency. At present, people usually use the fresh air heat recovery device to use the energy in the exhaust air to process the fresh air, reduce the fresh air pretreatment load and the heating (cooling) load, which is beneficial to reduce the energy consumption of the building, but there is no clear requirement on the running time.

Prior art (application number: 201410044089.1, title: an air-conditioning unit/device controller and system capable of controlling indoor air quality, publication date: 2014.4.30), which specifically discloses the control of PM2.5, CO ₂ and formaldehyde concentrations. Classification involves people's perceptual understanding of indoor air quality, combining sensor detection results with human experience, and collecting, analyzing and controlling the transmitted signals through a central computer, but the system is complicated to operate and takes a long time to run.

SUMMARY OF THE INVENTION

The technical problem to be solved by the present invention is to provide a fresh air system that realizes intelligent operation, which has three intelligent operation modes of intelligent timing, automatic control and remote control, and solves the problem of high energy consumption and poor indoor air comfort in the existing fresh air system. , the problem of long running time.

Another object of the present invention is to provide an operation method of a fresh air system that realizes intelligent operation.

The technical scheme adopted in the present invention is a fresh air system for realizing intelligent operation, including a fresh air system, an adaptive optimization timing system, a single-chip automatic control system and a remote control system; the adaptive optimization timing system includes a sampling module, a calculation module, The optimization module, the sampling module is used to collect the wind speed data in the indoor air supply duct, the sampling module, the calculation module, and the optimization module are connected in sequence, and the optimization module is connected with the relay; , CO ₂ sensor, human body sensor, display, relay connection; the remote control system includes a wifi module, the wifi module communicates with the wireless router, the wireless router communicates with the mobile base station through the Internet, and the mobile base station communicates with the mobile app through the Internet. The module is connected with the single chip; the relay is connected with the fresh air system through the AC contactor; the adaptive optimization timing system and the single-chip automatic control system are connected with the control panel through the same microcomputer.

The present invention is also characterized in that, further, the sampling module includes a first timing device, an wind speed probe, an A/D converter, a first comparison device, and a first storage device; the calculation module includes a second comparison device, a first shift device Bit register and second storage device; the optimization module includes a second shift register, a third storage device, and a second timing device; the first timing device is connected with the wind speed probe, the wind speed probe is placed in the indoor air supply duct, and the wind speed probe passes through A The /D converter is connected to the first comparison device, the first comparison device is connected to the first storage device; the first storage device is connected to the second comparison device, the second comparison device is connected to the second storage device, and the second storage device is connected to the first storage device. A shift register is connected, the second storage device is connected to the third storage device through the second shift register, and the third storage device is connected to the relay through the second timing device.

Further, the model of the wind speed probe is NU200E12TR-1G.

Further, the human body sensor and the display are installed on the front of the terminal device, the PM2.5 sensor, TVOC sensor, and CO ₂ sensor are embedded in the cavity of the terminal device, and the top, left and right sides of the terminal device are provided with exhaust air. There is a slot grille at the air outlet, a fan that can be opened and closed regularly is arranged behind the cavity of the terminal device, an air inlet and a power input end are arranged on the back of the terminal device, and the human body sensor is arranged on the front of the terminal device. In the lower right corner, the terminal device is independently set up in the fresh air system.

Further, the single-chip automatic control system and the self-adaptive optimization timing system are integrated and embedded in the main body of the fresh air system.

Further, the model of the single-chip microcomputer is MCS-51.

Further, the PM2.5 sensor is ZPH01 dust sensor, the TVOC sensor is ZP01 air quality sensor, the model of CO ₂ sensor is T6615, and the model of human body sensor is HC-SR501.

Further, the model of the display is LCD12864.

Further, the fresh air system is provided with a cold and heat recovery device and a high-efficiency purification device.

An operation method of a fresh air system for realizing intelligent operation, including intelligent timing, automatic control and remote control;

The intelligent timing is realized by an adaptive optimization timing system, and the specific steps are as follows:

Step 1, in the first 10 days of the first use of the fresh air system, manually turn on and off the fresh air system; the sampling module includes a first timing device, the first timing device is connected with the wind speed probe, and the wind speed probe is compared with the first time through the A/D converter. The first comparator is connected to the first storage device, the wind speed probe regularly samples the wind speed in the air supply duct, the wind speed probe detects the wind speed once every 10 minutes, and the wind speed data is converted by the A/D converter to obtain the wind speed data through the first comparison device. Compare the wind speed data with the set wind speed value, if the wind speed data does not exceed the set wind speed value, the corresponding period storage unit of the first storage device is "0"; if the wind speed data exceeds the set wind speed value, the first storage device's The corresponding period storage unit is "1", and 10 days is a cycle;

Step 2, the calculation module includes a second comparison device, the first storage device is connected with the second comparison device, the calculation module performs operations on the data of the storage unit in the corresponding time period in the past 10 days, and calculates that the storage unit in each time period in the past 10 days is " The occurrence probability of 1"; the occurrence probability of the storage unit being "1" is compared with the set probability by the second comparison device, and when the occurrence probability of the storage unit being "1" is greater than the set probability, it is determined that the period is an "on" period , the output value is "1"; on the contrary, when the probability of occurrence of the storage unit being "1" is less than the set probability, it is determined that the period is the "off" period, and the output value is "0"; the output value of the calculation result of each corresponding period is stored In the second storage device, the opening time and closing time of the fresh air system are preliminarily determined; the stored data in the cycle is moved forward by one day every day through the first shift register, the first day in the cycle is sacrificed, and the day on which the end of the cycle is postponed is taken as the end of the new cycle;

Step 3, the optimization module revises the initially determined opening time and closing time of the fresh air system, first takes out the corresponding storage unit data from the second storage device, and uses the second shift register to change the first output value of "1". The time period is moved forward by 3 storage units; the period with the first output value of "0" is moved backward by 3 storage units; the optimized corresponding storage unit data is stored in the third storage device, and the third storage device passes the The second timing device is connected to the relay. When the corresponding storage unit data of the third storage device is "1", the control relay outputs a high level, and the AC contactor controls the opening of the fresh air system; when the corresponding storage unit data of the third storage device is When "0", the control relay outputs a low level, and the fresh air system is controlled to close through the AC contactor;

The automatic control is realized by the single-chip automatic control system. First, the single-chip microcomputer is programmed to set the initial conditions. The single-chip computer compares the detected indoor pollutant concentration signal with the set concentration limit. When the concentration of any pollutant exceeds the standard, and The human body sensor detects that there is someone in the room, the output terminal of the single-chip microcomputer sends an "on" signal to the relay, and the fresh air system is turned on through the AC contactor; when the concentration of the three pollutants does not exceed the standard, or the human body sensor detects that there is no one in the room, the output terminal of the single-chip microcomputer sends the signal to the relay. The relay sends out a "not on" signal, and the fresh air system is not turned on through the AC contactor; when the single _- chip microcomputer receives a signal that the indoor PM2. In the case of no one, the single-chip microcomputer sends a "close" signal to the relay, and controls the fresh air system to stop running through the AC contactor;

The remote control is realized by a remote control system. The remote control system includes a wifi module, the wifi module is connected to a single chip, the wifi module is connected to a wireless router, the wireless router is connected to the mobile base station through the Internet, and the mobile base station is connected to the mobile phone app through the Internet. Communication connection, the single-chip microcomputer transmits the concentration signals detected by the PM2.5 sensor, TVOC sensor, and CO ₂ sensor to the Internet through the wireless network, and then sends it to the mobile phone app through the mobile base station. People monitor the indoor pollution in real time through the mobile phone app. The relay is connected, the relay is connected with the fresh air system through the AC contactor, and can control the opening and closing of the fresh air system through the mobile phone app outdoors.

The beneficial effects of the invention are as follows: the invention can realize three intelligent operation modes of intelligent timing, automatic control and remote control, and the adaptive optimization timing system collects, calculates and optimizes the time data of people using the fresh air system for the first 10 days, and automatically sets Set the opening and closing time of the fresh air system to meet people's requirements for comfort and health. The single-chip automatic control system sets the conditions by programming the single-chip computer. The single-chip computer automatically controls the opening and closing of the fresh air system according to the detected concentration signals of PM2.5, TVOC, CO ₂ and other pollutants and human body induction signals. The remote control system sends the pollutant concentration signal detected by the sensor to the mobile phone app through the wifi module, and can control the opening and closing of the fresh air system through the mobile phone app. Through the above three intelligent operation modes, while ensuring that the indoor air meets the requirements of human comfort, the building effectively saves energy by reducing the running time of the fresh air system.

The present invention also has the following characteristics:

(1) Open in advance and close later

The self-adaptive optimization timing system collects and calculates the time data of people using the fresh air system in the first 10 days, and initially determines the opening and closing time of the fresh air system, and then uses the optimization module to adjust the opening and closing time of the fresh air system. Realize that the fresh air system is turned on before people enter the room to ensure that people can breathe fresh air when they enter the room; delay the closing time of the fresh air system to further discharge the residual foul gas when people leave the room; the calculation module includes the first shift register, every day Moving the stored data in the cycle forward by one day, sacrificing the first day in the cycle, and taking the day when the end of the cycle is postponed as the end of the new cycle, it can be updated and adjusted continuously as people's usage habits change, which is more practical.

(2) Combination of automatic control and energy saving

At present, the general attention to the fresh air system focuses on the purification of pollutants, but today, with the increasingly prominent energy problem, how to effectively purify and meet the requirements of energy saving has gradually attracted people's attention; the single-chip automatic control system of the present invention can automatically control the operation of the fresh air system. The human body induction device limits the prerequisites for the opening of the fresh air system. Not only the pollutants in the indoor air exceed the standard, but also the fresh air system will be opened only when there are people in the room; Condition that generates energy consumption.

(3) Real-time monitoring, remote control

The invention sends the pollutant concentration signal detected by the sensor to the mobile phone app through the wifi module, and can control the opening and closing of the fresh air system through the mobile phone app; people can also monitor the indoor air quality in real time through the mobile phone app outdoors, and according to the indoor pollution situation, Realize remote control of opening and closing of fresh air system. In this way, people can check the current indoor air quality before going home. If there is pollution in the room, they can turn on the fresh air system in advance through the mobile app. The indoor air has been purified before returning home, ensuring the indoor air quality.

Description of drawings

In order to explain the embodiments of the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained according to these drawings without creative efforts.

FIG. 1 is a schematic structural diagram of the fresh air system of the present invention.

FIG. 2 is a structural block diagram of the self-adaptive optimization timing system of the present invention.

Fig. 3 is the control flow chart of the self-adaptive optimization timing system of the present invention.

FIG. 4 is a structural block diagram of the single-chip automatic control system of the present invention.

Fig. 5 is the control flow chart of the single chip automatic control system of the present invention.

FIG. 6 is a schematic structural diagram of the remote control system of the present invention.

In the picture, 1. Adaptive optimization timing system, 2. Single chip, 3. Fresh air system, 4. PM2.5 sensor, 5. TVOC sensor, 6. CO ₂ sensor, 7. Human body sensor, 8. Display, 9. Fan, 10. End device, 11. wifi module, 12. Relay, 13. AC contactor, 14. Sampling module, 15. Calculation module, 16. Optimization module, 17. Wireless router, 18. Mobile base station, 19. Mobile phone app.

Detailed ways

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The structure of the present invention includes a fresh air system 3, an adaptive optimization timing system 1, a single-chip automatic control system and a remote control system.

The structure of the fresh air system 3 is shown in Figure 1. The fresh air system 3 is provided with a heat recovery device and a purification device. The single-chip automatic control system and the adaptive optimization timing system 1 are integrated and embedded in the main body of the fresh air system 3; the terminal device 10 Independent setting, the human body sensor 7 and the display 8 are installed on the front of the terminal device 10, the PM2.5 sensor 4, TVOC sensor 5, and CO ₂ sensor 6 are embedded in the cavity of the terminal device 10. The right side is provided with an air outlet, the air outlet is provided with a slit grille, and behind the cavity of the terminal device 10 is a fan 9 that can be opened and closed regularly, and the fan 9 runs for 3 minutes every 10 minutes; An air inlet and a power input terminal are arranged on the back, and an air inlet and a power input terminal are arranged on the back of the terminal device 10 .

The terminal device 10 is independently set in the fresh air system 3, the equipment is small and beautiful, can be independently controlled, has strong anti-interference ability, strictly controls the detection air volume, and the arrangement location is not restricted by the fresh air system. The air is drawn in by the fan 9, and the air flows through the cavity and is in full contact with the PM2.5 sensor, TVOC sensor, and CO ₂ sensor. In the present invention, the detection frequency is set to 1 time/5min. If the detection frequency is set too large, the fan loss will increase; if the detection frequency is set too small, human health will be damaged; .

The model selection of single chip microcomputer 2, PM2.5 sensor 4, TVOC sensor 5, CO ₂ sensor 6, human body sensor 7, and display 8 is shown in Table 1.

Table 1 Sensor and display model selection

The structure of the adaptive optimization timing system 1, as shown in FIG. 2, includes a sampling module 14, a calculation module 15, and an optimization module 16. The sampling module 14 is used to collect the wind speed data in the indoor air supply duct. The sampling module 14, the calculation module 15, The optimization modules 16 are connected in sequence, and the optimization modules 16 are connected with the relay 12 .

The sampling module 14 includes a first timing device, an air velocity probe, an A/D converter, a first comparison device, and a first storage device. The air velocity probe is placed in the indoor air supply duct to avoid unfiltered air particles, pollen, dust, etc. Pollutants cause damage to the wind speed probe, the model of the wind speed probe is NU200E12TR-1G; the calculation module 15 includes a second comparison device, a first shift register, and a second storage device; the optimization module 16 includes a second shift register and a third storage device , the second timing device; the first timing device is connected with the wind speed probe, the wind speed probe is placed in the indoor air supply duct, the wind speed probe is connected with the first comparison device through the A/D converter, and the first comparison device is connected with the first storage device The first storage device is connected with the second comparison device, the second comparison device is connected with the second storage device, the second storage device is connected with the first shift register, and the second storage device is connected with the third storage device through the second shift register connected, the third storage device is connected to the relay 12 through the second timing device.

The structure of the single-chip automatic control system, as shown in Figure 4, includes a single-chip microcomputer 2, and the single-chip microcomputer 2 is respectively connected with the PM2.5 sensor 4, TVOC sensor 5, CO ₂ sensor 6, human body sensor 7, display 8, relay 12, and relay 12 It is connected to the fresh air system 3 through the AC contactor 13; the single-chip microcomputer 2 receives the concentration signal detected by the PM2.5 sensor 4, TVOC sensor 5, CO ₂ sensor 6 and the human body sensor 7 sends out the "indoor person" or "indoor unmanned" signal , according to the upper and lower limits of the pollutant concentration initially set on the single-chip microcomputer 2, determine whether to send a signal to the relay 12, and control the opening or closing of the fresh air system 3 through the AC contactor 13; at the same time, the single-chip microcomputer 2 sends the real-time pollutant concentration signal to the display 8. , so that people can know the concentration of indoor pollutants in real time. The self-adaptive optimization timing system 1 and the single-chip automatic control system are connected to the control panel through the same microcomputer. Through the control panel, it is determined to use the self-adaptive optimization timing system 1 or the single-chip automatic control system to control the fresh air system 3. 1. The single-chip automatic control system selects and sets.

The remote control system, as shown in Figure 6, includes a wifi module 11, which is connected to a wireless router 17 in communication, the wireless router 17 is connected to a mobile base station 18 through the Internet, and the mobile base station 18 is connected to a mobile phone app 19 through the Internet. The concentration signals detected by the PM2.5 sensor 4, TVOC sensor 5, and CO ₂ sensor 6 are transmitted to the Internet through the wireless network, and the pollutant concentration signal is sent to the mobile phone app19 through the mobile base station 18; people monitor the indoor pollution in real time through the mobile phone app19 The wifi module 11 is connected to the stand-alone chip 2, the stand-alone chip 2 is connected to the relay 12, the relay 12 is connected to the fresh air system 3 through the AC contactor 13, and people can control the opening and closing of the fresh air system 3 through the mobile phone app 19 outdoors.

The operation method of the fresh air system which realizes the intelligent operation of the present invention includes intelligent timing, automatic control and remote control, which not only meets the requirements of human comfort, but also meets the requirements of green building energy conservation.

Intelligent timing: realized by self-adaptive optimization timing system 1, as shown in Figure 3, according to the following steps:

Step 1, in the first 10 days of the first use of the fresh air system 3, manually open and close the fresh air system 3; the sampling module 14 includes a first timing device, the first timing device is connected with the wind speed probe, and the wind speed probe is connected to the air speed probe through the A/D converter. The first comparator is connected, the first comparator is connected with the first storage device, the wind speed probe regularly samples the wind speed in the air supply duct, the wind speed probe detects the wind speed once every 10 minutes, and the wind speed data is converted by the A/D converter. A comparison device compares the wind speed data with the set wind speed value. If the wind speed data does not exceed the set wind speed value, the corresponding period of the first storage device (for example: 5:00-5:10 is a period of time) The storage unit is " 0"; if the wind speed data exceeds the set wind speed value, the corresponding period storage unit of the first storage device is "1", with 10 days as a cycle;

Step 2, the calculation module 15 includes a second comparison device, the first storage device is connected with the second comparison device, the calculation module 15 performs operations on the data of the corresponding period storage units in the past 10 days, and calculates the storage units for each time period in the past 10 days. The probability of occurrence is "1" (equal to the average value of the data in the corresponding time period of 10 days); the second comparison device compares the occurrence probability of the storage unit as "1" with the set probability, and the set probability is 0.5, when the storage unit is "1". The occurrence probability of the unit being "1" is greater than the set probability, and the period is determined to be the "on" period, and the output value is "1"; on the contrary, when the occurrence probability of the storage unit being "1" is less than the set probability, the period is determined to be "1" "Close" period, the output value is "0"; the output value of the calculation results of each corresponding period is stored in the second storage device, and the opening time and closing time of the fresh air system 3 are preliminarily determined; The stored data is moved forward one day, the first day in the cycle is sacrificed, and the day on which the end of the cycle is postponed is regarded as the end of the new cycle, so the running time of the 10-day cycle initially determined by the system will be continuously updated;

Step 3, the optimization module 16 corrects the initially determined opening time and closing time of the fresh air system 3, first takes out the corresponding storage unit data from the second storage device, and uses the second shift register to set the first output value as "1". ” move forward by 3 storage units (ie: the opening time of the fresh air system 3 is 0.5h earlier than the initially determined opening time); in the same way, move the first output value of “0” back 3 storage units Storage unit (ie: the closing time of the fresh air system 3 is delayed by 0.5h relative to the initially determined closing time); the optimized corresponding storage unit data is stored in the third storage device, and the third storage device is connected with the relay 12 through the second timing device. , when the corresponding storage unit data of the third storage device is "1", the control relay 12 outputs a high level, and controls the fresh air system 3 to open through the AC contactor 13; when the corresponding storage unit data of the third storage device is "0" At this time, the control relay 12 outputs a low level, and controls the fresh air system 3 to close through the AC contactor 13 .

The existing fresh air system adopts the timing mode, but the set time is generally kept unchanged under the condition of unmanned operation, ignoring the changes of people's daily operation. However, the self-adaptive optimization timing system 1 of the present invention is optimized on the basis of timing design, and can automatically set the on-off time to meet the air quality requirements, automatically identify the time when people use the fresh air system 3, and determine that people use the fresh air system for nearly 10 days. The average opening time and closing time of 3, control the fresh air system 3 to start running before people enter the room, to ensure that the indoor air is fresh and pollution-free when people return home, and it is automatically closed after people leave home, which not only ensures the air quality when entering the room , while achieving the purpose of energy saving.

Automatic control: realized by the single-chip automatic control system, the control process of the single-chip automatic control system is shown in Figure 5. First, the initial conditions are set by programming the single-chip microcomputer 2, including CO ₂ , PM2.5, TVOC three pollutants. The upper limit concentration, lower limit concentration value and various logic control, the single-chip microcomputer 2 compares the detected indoor pollutant concentration signal with the set concentration limit, when the concentration of any pollutant exceeds the standard, and the human body sensor 7 detects that there are people in the room Next, the output terminal of the single-chip microcomputer 2 sends an "on" signal to the relay 12, and the fresh air system 3 is turned on through the AC contactor 13: when the concentration of the three pollutants does not exceed the standard, or the human body sensor 7 detects that there is no one in the room, the output terminal of the single-chip microcomputer 2 sends to The relay 12 sends a "not open" signal, and the fresh air system 3 is not turned on through the AC contactor 13; with the operation of the fresh air system 3, the indoor pollutant concentration gradually decreases. When the single-chip microcomputer 2 receives indoor PM2.5, TVOC, _CO2 When the concentration is lower than the corresponding lower limit (50% of the upper limit) of the concentration or the human body sensor 7 detects that there is no one in the room, the single-chip microcomputer 2 sends a "close" signal to the relay 12, through the AC contactor 13 Control the fresh air system 3 to stop running.

The upper limit of the concentration of PM2.5, CO ₂ and TVOC three pollutants meets the higher requirements set by the "Green Building Evaluation Standard" (GBT50378-2014) as a bonus item. According to GB T18883-2002 "Indoor Air Quality" It is stipulated that the standard value of TVOC mass concentration in the environment is 0.6mg/m ³ (8-hour average); the volume concentration of carbon dioxide is limited to 0.1%; and China's indoor air quality has not yet had a clear standard for PM2.5 concentration limit, but indoor air quality The concentration requirement of PM2.5 should not be lower than the outdoor concentration. According to GB3095-2012 "Ambient Air Quality Standard", the indoor PM2.5 concentration in civil construction is limited to 75μg/m ³ , so the ambient PM2.5 standard is used as the indoor PM2.5 limit concentration. However, higher requirements are put forward in the GBT50378-2014 "Green Building Evaluation Standard" standard, which requires that the concentration limit should be lower than 70% of the concentration required by "Indoor Air Quality", and the standard mass concentration of TVOC (total volatile organic compounds) is 0.42 mg/m ³ ; the standard volume concentration of CO ₂ is 700 ppm; the standard mass concentration of PM 2.5 is 52.5 μg/m ³ ; see Table 2 for details. Among them, PM2.5 is mainly caused by the infiltration of particulate matter in the outdoor air into the room through the gaps of doors and windows. TVOC is mainly produced by the volatilization of indoor carpets and furniture. _CO2 is mainly affected by the density of indoor personnel. There are three types of _CO2 , PM2.5 and TVOC. Typical pollutants represent outdoor infiltration pollution intensity, indoor volatile pollution intensity, and personnel density, respectively. Therefore, when the three pollutants do not exceed the standard, it can be determined that the indoor pollutants do not exceed the standard and the indoor air is fresh; when any one of CO ₂ , PM2.5, and TVOC exceeds the standard, it will cause harm to human health. Turn on the fresh air system 3 to conduct ventilation to reduce the concentration of pollutants in the indoor air. The CO ₂ sensor 6 , the PM2.5 sensor 4 , and the TVOC sensor 5 continue to detect the pollutant concentration. When the three pollutant concentrations are reduced to half of the limit concentration, the fresh air system 3 stops running. When the pollutants exceed the standard, the fresh air system 3 will continue to repeat the above work, and at the same time, the present invention considers the situation of whether there is no one in the room.

Table 2 Regulations on the concentration limits of three pollutants

Types of pollutants CO₂ TVOC PM2.5 concentration limit 700ppm 0.42mg/m³ 52.5μg/m³

Remote control: realized by the remote control system, the single-chip automatic control system also includes a wifi module 11, the wifi module 11 communicates with the wireless router 17, the wireless router 17 communicates with the mobile base station 18 through the Internet, and the mobile base station 18 communicates with the mobile phone app 19 through the Internet Connection; the single chip microcomputer 2 transmits the concentration signals detected by the PM2.5 sensor 4, TVOC sensor 5, and CO ₂ sensor 6 to the Internet through the wireless network, and the concentration signal of the pollutants is sent to the mobile phone app19 through the mobile base station 18; people use the mobile phone app19 in real time To monitor indoor pollution, you can control the opening and closing of the fresh air system 3 through the mobile phone app19 outdoors, that is, check the indoor air quality before going home. If the indoor air quality is not up to standard, you can turn on the fresh air system 3 from a long distance, and realize it before going home. Indoor air purification to ensure indoor air quality.

In the background art, an air-conditioning unit/device controller and system capable of controlling indoor air quality discloses the classification of PM2.5, CO ₂ , and formaldehyde concentrations, which involves people's perceptual knowledge of indoor air quality. The result is combined with human experience, and the transmitted signal is collected, analyzed and controlled by the central computer. The operation of the above-mentioned system is complicated and the running time is long. In contrast, the implementation process of the present invention is relatively simple and the target is highly targeted. The sensor directly outputs the signal to the single-chip microcomputer 2 , and the single-chip microcomputer 2 outputs the signal directly to the relay 12 according to the set conditions, thereby controlling the fresh air system 3 . The automatic response process is simplified, and the present invention realizes that the fresh air system is turned on before people enter the room through the adaptive optimization timing system 1, which satisfies the habit of opening windows for ventilation first when people enter the room, and provides people with a comfortable and healthy living environment; It is automatically turned off after leaving the house, which not only ensures the air quality when entering the room, but also achieves the purpose of energy saving.

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention are included in the protection scope of the present invention.

Claims (9)

1. an operation method of a fresh air system that realizes intelligent operation, is characterized in that, The fresh air system for realizing intelligent operation includes a fresh air system (3), an adaptive optimization timing system (1), a single-chip automatic control system and a remote control system; the adaptive optimization timing system (1) includes a sampling module (14), a calculation The module (15), the optimization module (16), and the sampling module (14) are used for collecting wind speed data in the indoor air supply duct, and the sampling module (14), the calculation module (15), and the optimization module (16) are connected in sequence, and the optimization module ( 16) Connect with the relay (12); the single-chip automatic control system includes a single-chip microcomputer (2), and the single-chip microcomputer (2) is respectively connected with a PM2.5 sensor (4), a TVOC sensor (5), a CO ₂ sensor (6), and a human body sensor ( 7), the display (8) and the relay (12) are connected; the remote control system includes a wifi module (11), the wifi module (11) is connected to the wireless router (17) for communication, and the wireless router (17) communicates with the mobile base station (18) through the Internet ) communication connection, the mobile base station (18) communicates with the mobile phone app (19) through the Internet, the wifi module (11) is connected with the single chip (2); the relay (12) is connected with the fresh air system (3) through the AC contactor (13) ;The self-adaptive optimization timing system (1) and the single-chip automatic control system are connected with the control panel through the same microcomputer; Including intelligent timing, automatic control and remote control; the intelligent timing is realized by the adaptive optimization timing system (1), and the specific steps are as follows: Step 1, in the first 10 days of the first use of the fresh air system (3), manually open and close the fresh air system (3); the sampling module (14) includes a first timing device, and the first timing device is connected with the wind speed probe, and the wind speed probe passes through. The A/D converter is connected to the first comparator, and the first comparator is connected to the first storage device. The wind speed probe regularly samples the wind speed in the air supply duct. The wind speed probe detects the wind speed once every 10 minutes, and is converted by the A/D converter. Obtain the wind speed data, compare the wind speed data with the set wind speed value through the first comparison device, if the wind speed data does not exceed the set wind speed value, the corresponding period storage unit of the first storage device is "0"; wind speed value, the corresponding period storage unit of the first storage device is "1", and 10 days is a cycle; Step 2, the calculation module (15) includes a second comparison device, the first storage device is connected with the second comparison device, and the calculation module (15) performs operations on the data of the corresponding time period storage units in the past 10 days, and calculates that each The occurrence probability that the storage unit is "1" in the time period; the second comparing device compares the occurrence probability of the storage unit being "1" with the set probability, when the occurrence probability of the storage unit being "1" is greater than the set probability, determine the The period is the "on" period, and the output value is "1"; on the contrary, when the probability of occurrence of the storage unit being "1" is less than the set probability, the period is determined to be the "off" period, and the output value is "0"; The output value of the calculation result is stored in the second storage device, and the opening time and closing time of the fresh air system (3) are preliminarily determined; the stored data in the cycle is moved forward by one day every day through the first shift register, and the first in the cycle is sacrificed. day, the day on which the end of the cycle is postponed is regarded as the end of the new cycle; Step 3, the optimization module (16) corrects the initially determined opening time and closing time of the fresh air system (3), first takes out the corresponding storage unit data from the second storage device, and uses the second shift register to output the first output. The period whose value is "1" is moved forward by 3 storage units; the period with the first output value of "0" is moved backward by 3 storage units; the optimized corresponding storage unit data is stored in the third storage device, The third storage device is connected to the relay (12) through the second timing device, and when the corresponding storage unit data of the third storage device is "1", the control relay (12) outputs a high level, which is controlled by the AC contactor (13) The fresh air system (3) is turned on; when the corresponding storage unit data of the third storage device is "0", the control relay (12) outputs a low level, and the fresh air system (3) is controlled to close through the AC contactor (13); The automatic control is realized by the single-chip automatic control system. First, the single-chip microcomputer (2) is programmed to set the initial conditions, and the single-chip computer (2) compares the detected indoor pollutant concentration signal with the set concentration limit value. When the pollutant concentration exceeds the standard, and the human body sensor (7) detects that there is someone in the room, the output terminal of the single-chip microcomputer (2) sends an "on" signal to the relay (12), and the fresh air system (3) is turned on through the AC contactor (13); when three If the concentration of the pollutants does not exceed the standard, or the human body sensor (7) detects that there is no one in the room, the output end of the single-chip microcomputer (2) sends a "not on" signal to the relay (12), and the fresh air system (13) is not turned on through the AC contactor (13). 3); When the single-chip microcomputer (2) receives a signal that the indoor PM2.5, TVOC, and CO ₂ concentrations are all lower than their corresponding lower limit values, or the human body sensor (7) detects that there is no one in the room, the single-chip microcomputer (2). ) sends a "close" signal to the relay (12), and controls the fresh air system (3) to stop running through the AC contactor (13); The remote control is realized by a remote control system, the remote control system includes a wifi module (11), the wifi module (11) is connected with the single chip (2), the wifi module (11) is connected with the wireless router (17) for communication, and the wireless router ( 17) The mobile base station (18) communicates with the mobile base station (18) through the Internet, the mobile base station (18) communicates with the mobile phone app (19) through the Internet, and the single-chip microcomputer (2) connects the PM2.5 sensor (4) and the TVOC sensor (5) through the wireless network. , The concentration signal detected by the CO ₂ sensor (6) is transmitted to the Internet, and then sent to the mobile phone app (19) through the mobile base station (18), and people monitor the indoor pollution in real time through the mobile phone app (19); (12) Connection, the relay (12) is connected with the fresh air system (3) through the AC contactor (13), and can control the opening and closing of the fresh air system (3) through the mobile phone app (19) outdoors. 2. The method according to claim 1, wherein the sampling module (14) comprises a first timing device, an wind speed probe, an A/D converter, a first comparison device, and a first storage device; a calculation module (14) 15) comprising the second comparison device, the first shift register, the second storage device; the optimization module (16) comprises the second shift register, the third storage device, the second timing device; the first timing device is connected with the wind speed probe, The wind speed probe is placed in the indoor air supply duct, the wind speed probe is connected with the first comparison device through the A/D converter, the first comparison device is connected with the first storage device; the first storage device is connected with the second comparison device, and the second comparison device is connected. The device is connected to the second storage device, the second storage device is connected to the first shift register, the second storage device is connected to the third storage device through the second shift register, and the third storage device is connected to the relay (12 through the second timing device) )connect. 3. The method according to claim 2, wherein the model of the anemometer is NU200E12TR-1G. 4. The method according to claim 1, wherein the human body sensor (7) and the display (8) are installed on the front of the terminal device (10), the PM2.5 sensor (4), the TVOC sensor (5) ), the CO ₂ sensor (6) is embedded in the cavity of the terminal device (10), the top, left and right sides of the terminal device (10) are provided with exhaust ports, and the exhaust ports are provided with slit grilles. A fan (9) that can be opened and closed regularly is arranged behind the cavity of the device (10), an air inlet and a power input end are arranged on the back of the terminal device (10), and a human body sensor (7) is arranged on the front of the terminal device (10). In the lower right corner of the device, the terminal device (10) is independently arranged in the fresh air system (3). 5 . The method according to claim 1 , wherein the single-chip automatic control system and the self-adaptive optimization timing system ( 1 ) are integrated and embedded in the main body of the fresh air system ( 3 ). 6 . 6. The method according to claim 1, wherein the model of the single-chip microcomputer (2) is MCS-51. 7. The method according to claim 1, wherein the PM2.5 sensor (4) is a ZPH01 dust sensor, the TVOC sensor (5) is a ZP01 air quality sensor, and the model of the _CO2 sensor (6) is T6615 , the model of the human body sensor (7) is HC-SR501. 8. The method according to claim 1, wherein the model of the display (8) is LCD12864. 9. The method according to claim 1, characterized in that, a cold and heat recovery device and a high-efficiency purification device are provided in the fresh air system (3).