Indoor fresh air control method, fresh air equipment, storage medium and electronic equipment

Abstract

The invention provides an indoor fresh air control method, fresh air equipment, a storage medium and electronic equipment.The method comprises the steps that the current carbon dioxide concentration in a target indoor area is obtained, and the number of living bodies in the target indoor area is obtained; the living body density in the target indoor area is calculated according to the living body number; and the ventilation state of a ventilation assembly in the target indoor area is controlled according to the current carbon dioxide concentration and the living body density. Energy waste caused by full-time maximum air speed air supply is avoided, and the technical problem of energy waste caused by the fact that a new energy system supplies air according to the maximum air speed in the related technology is solved.

Description

Technical Field

[0001] The present invention relates to the field of fresh air technology, and in particular to a method for controlling indoor fresh air and fresh air equipment, a storage medium, and an electronic device. Background Art

[0002] In the relevant technology, indoor air quality is an important factor that determines the health and comfort of residents. With the continuous advancement of urbanization, severe indoor air and building problems have increased sharply. Ventilation has improved air quality to a certain extent. However, the fresh air systems in many large shopping malls and buildings often supply air at maximum power. Even if everyone has energy-saving awareness, it is impossible to adjust the fan speed in real time according to the number of people indoors, which results in serious energy waste. Therefore, for densely populated and dynamically changing spaces, maintaining the maximum wind speed will lead to energy waste.

[0003] In the related art, the indoor air environment of office buildings is often improved by installing central air conditioning, and the working parameters of the air outlets are set using a fixed wind speed strategy throughout the day. The maximum air volume of the office building is the sum of the maximum air volumes of each area in the same time period. However, when the indoor air quality demand changes due to changes in indoor personnel in the office building, the adjustment method of the central air conditioning system cannot meet the requirements of the changes in CO2 concentration in different areas of the above-mentioned office building. It is also difficult to achieve targeted and precise control of certain individual areas. If the ventilation system runs at a large air volume for a long time, it will cause a sharp increase in ventilation energy consumption or even a large amount of energy waste, affecting the air conditioning effect when the indoor air conditioner is turned on.

[0004] With respect to the above-mentioned problems existing in the related technologies, no efficient and accurate solutions have been found yet. Summary of the invention

[0005] The present invention provides a method for controlling indoor fresh air, and fresh air equipment, a storage medium, and an electronic device to solve the technical problems in the related art.

[0006] According to one embodiment of the present invention, a method for controlling indoor fresh air is provided, comprising: obtaining a current carbon dioxide concentration in a target indoor area, and obtaining the number of living organisms in the target indoor area; calculating a living organism density in the target indoor area based on the number of living organisms; and controlling the ventilation state of a ventilation component in the target indoor area based on the current carbon dioxide concentration and the living organism density.

[0007] Optionally, obtaining the number of living bodies in the target indoor area includes: collecting operating parameters of all fixed terminals in the target indoor area through a digital base controller, wherein the digital base controller is communicatively connected to the fixed terminals; for each fixed terminal, determining whether the corresponding operating parameters meet preset conditions; counting the number of fixed terminals in the target indoor area whose operating parameters meet the preset conditions; and determining the number of terminals as the number of living bodies in the target indoor area.

[0008] Optionally, controlling the ventilation state of the ventilation component in the target indoor area according to the current carbon dioxide concentration and the living body density includes: controlling the switching state of the fresh air valve in the target indoor area according to the current carbon dioxide concentration, wherein the fresh air valve is connected to the fresh air duct between the outdoor fresh air unit and the indoor fresh air supply outlet; judging whether the living body density is greater than a preset value; if the living body density is greater than the preset value, controlling the opening of the window opener in the target indoor area according to the living body density and the current carbon dioxide concentration, wherein the window opener is installed on the window of the target indoor area; wherein the ventilation component includes the fresh air valve and the window opener.

[0009] Optionally, controlling the switching state of the fresh air valve in the target indoor area according to the current carbon dioxide concentration includes: determining whether the current carbon dioxide concentration is within a preset concentration range; if the current carbon dioxide concentration is not within the preset concentration range, controlling the fresh air valve in the target indoor area to be in an open state; if the current carbon dioxide concentration is within the preset concentration range, controlling the fresh air valve in the target indoor area to be in a closed state.

[0010] Optionally, controlling the opening of the window opener in the target indoor area according to the living body density and the current carbon dioxide concentration includes: obtaining the historical carbon dioxide concentration of the target indoor area in the previous control cycle, and calculating the carbon dioxide production rate of the target indoor area according to the living body density; controlling the opening of the window opener in the target indoor area in the current control cycle according to the current carbon dioxide concentration, the historical carbon dioxide concentration, and the carbon dioxide production rate.

[0011] Optionally, controlling the opening of the window opener in the target indoor area in the current control cycle according to the current carbon dioxide concentration, the historical carbon dioxide concentration, and the carbon dioxide production rate includes: calculating the required ventilation air volume L in the target indoor area using the following formula: Wherein, x is the carbon dioxide production rate, y1 is the current carbon dioxide concentration, and y2 is the historical carbon dioxide concentration; the opening degree of the window opener in the target indoor area in the current control cycle is controlled based on the required ventilation air volume.

[0012] Optionally, after determining whether the living body density is greater than a preset value, the method includes: if the living body density is less than or equal to the preset value, closing the window opener in the target indoor area.

[0013] According to another embodiment of the present invention, a fresh air device is provided, which includes: a controller and a ventilation component, wherein the controller includes: an acquisition module for acquiring a current carbon dioxide concentration in a target indoor area and acquiring the number of living organisms in the target indoor area; a calculation module for calculating a living organism density in the target indoor area based on the number of living organisms; and a control module for controlling the ventilation state of the ventilation component in the target indoor area based on the current carbon dioxide concentration and the living organism density.

[0014] Optionally, the acquisition module includes: a collection unit, used to collect operating parameters of all fixed terminals in the target indoor area through a digital base controller, wherein the digital base controller is communicatively connected to the fixed terminals; a judgment unit, used to judge whether the corresponding operating parameters of each fixed terminal meet preset conditions; a statistical unit, used to count the number of fixed terminals in the target indoor area whose operating parameters meet preset conditions; and a determination unit, used to determine the number of terminals as the number of living bodies in the target indoor area.

[0015] Optionally, the control module includes: a first control unit, used to control the switching state of the fresh air valve in the target indoor area according to the current carbon dioxide concentration, wherein the fresh air valve is connected to the fresh air duct between the outdoor fresh air unit and the indoor fresh air supply outlet; a judgment unit, used to judge whether the living body density is greater than a preset value; a second control unit, used to control the opening of the window opener in the target indoor area according to the living body density and the current carbon dioxide concentration if the living body density is greater than the preset value, wherein the window opener is installed on the window of the target indoor area; wherein the ventilation component includes the fresh air valve and the window opener.

[0016] Optionally, the first control unit includes: a judgment subunit, used to judge whether the current carbon dioxide concentration is within a preset concentration range; a control subunit, used to control the fresh air valve of the target indoor area to an open state if the current carbon dioxide concentration is not within the preset concentration range; if the current carbon dioxide concentration is within the preset concentration range, control the fresh air valve of the target indoor area to a closed state.

[0017] Optionally, the second control unit includes: an acquisition subunit, used to acquire the historical carbon dioxide concentration of the target indoor area in the previous control cycle, and calculate the carbon dioxide production rate of the target indoor area based on the living body density; a control subunit, used to control the opening of the window opener in the target indoor area in the current control cycle based on the current carbon dioxide concentration, the historical carbon dioxide concentration, and the carbon dioxide production rate.

[0018] Optionally, the control subunit is further used to: calculate the required ventilation air volume L in the target indoor area using the following formula: Wherein, x is the carbon dioxide production rate, y1 is the current carbon dioxide concentration, and y2 is the historical carbon dioxide concentration; the opening degree of the window opener in the target indoor area in the current control cycle is controlled based on the required ventilation air volume.

[0019] Optionally, the control module includes: a closing unit, configured to close the window opener in the target indoor area if the living body density is less than or equal to the preset value after the judging unit judges whether the living body density is greater than a preset value.

[0020] According to another aspect of an embodiment of the present application, a storage medium is further provided, which includes a stored program, and the above steps are executed when the program is run.

[0021] According to another aspect of an embodiment of the present application, there is also provided an electronic device, including a processor, a communication interface, a memory and a communication bus, wherein the processor, the communication interface and the memory communicate with each other via the communication bus; wherein: the memory is used to store computer programs; and the processor is used to execute the steps in the above method by running the program stored in the memory.

[0022] According to yet another embodiment of the present invention, a storage medium is provided, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above-mentioned device embodiments when running.

[0023] Through the embodiments of the present invention, the current carbon dioxide concentration in the target indoor area and the number of living organisms in the target indoor area are obtained, the living organism density in the target indoor area is calculated according to the number of living organisms, and the ventilation state of the ventilation components in the target indoor area is controlled according to the current carbon dioxide concentration and the living organism density. By adopting the current carbon dioxide concentration and the living organism density in the target indoor area to control the ventilation state of the ventilation components in the target indoor area, flexible control of the ventilation components can be achieved based on the real-time indoor fresh air demand, avoiding energy waste caused by full-time maximum wind speed air supply, and solving the technical problem of energy waste caused by the new energy system supplying air at the maximum wind speed in the related art. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of this application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0025] Figure 1 This is a hardware structure block diagram of a fresh air device according to an embodiment of the present invention;

[0026] Figure 2 is a flow chart of a method for controlling indoor fresh air according to an embodiment of the present invention;

[0027] Figure 3 is a schematic diagram of an indoor fresh air system according to an embodiment of the present invention;

[0028] Figure 4 is a schematic diagram of an indoor CO2 ventilation model in an embodiment of the present invention;

[0029] Figure 5 is a logic diagram of indoor fresh air control in an embodiment of the present invention;

[0030] Figure 6 It is a structural block diagram of a fresh air device according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] In order to enable those skilled in the art to better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present application. It should be noted that the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0032] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. It should be understood that the data used in this way can be interchangeable where appropriate, so that the embodiments of the present application described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0033] Example 1

[0034] The method embodiment provided in the first embodiment of the present application can be executed in a fresh air device, an air conditioner, a controller or a similar device management device. Taking the operation on the fresh air device as an example, Figure 1 1 is a hardware structure diagram of a fresh air device according to an embodiment of the present invention. Figure 1 As shown, the fresh air equipment may include one or more ( Figure 1 Only one is shown in the figure) a processor 102 (the processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA) and a memory 104 for storing data. Optionally, the above-mentioned fresh air device may also include a transmission device 106 and an input / output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is for illustration only and does not limit the structure of the above-mentioned fresh air device. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations shown.

[0035] The memory 104 can be used to store fresh air equipment programs, for example, software programs and modules of application software, such as a fresh air equipment program corresponding to a method for controlling indoor fresh air in an embodiment of the present invention. The processor 102 executes various functional applications and data processing by running the fresh air equipment program stored in the memory 104, that is, to implement the above method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some instances, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the fresh air equipment via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0036] The transmission device 106 is used to receive or send data via a network. The specific example of the above network may include a wireless network provided by a communication provider of the fresh air equipment. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (Radio Frequency, referred to as RF) module, which is used to communicate with the Internet wirelessly.

[0037] In this embodiment, a method for controlling indoor fresh air is provided. Figure 2 is a flow chart of a method for controlling indoor fresh air according to an embodiment of the present invention. Figure 2 As shown, the process includes the following steps:

[0038] Step S202, obtaining the current carbon dioxide concentration in the target indoor area, and obtaining the number of living bodies in the target indoor area;

[0039] Optionally, the number of living bodies may be the number of people. When the solution of this embodiment is applied in scenarios such as farms and vegetable greenhouses, the number of living bodies may also be the number of other living bodies that affect or depend on the carbon dioxide concentration, such as the number of poultry, the number of vegetables, etc.

[0040] The current carbon dioxide concentration can be collected by sensors.

[0041] Step S204, calculating the density of living bodies in the target indoor area according to the number of living bodies;

[0042] Optionally, the density of living organisms may be calculated based on the area volume and the number of living organisms in the target indoor area.

[0043] Step S206: Control the ventilation state of the ventilation components in the target indoor area according to the current carbon dioxide concentration and the living body density.

[0044] Optionally, the ventilation assembly includes a fresh air valve and the window opener.

[0045] Through the above steps, the current carbon dioxide concentration in the target indoor area and the number of living organisms in the target indoor area are obtained, the living organism density in the target indoor area is calculated according to the number of living organisms, and the ventilation state of the ventilation components in the target indoor area is controlled according to the current carbon dioxide concentration and the living organism density. By adopting the current carbon dioxide concentration and the living organism density in the target indoor area to control the ventilation state of the ventilation components in the target indoor area, flexible control of the ventilation components can be achieved based on the real-time indoor fresh air demand, avoiding energy waste caused by full-time maximum wind speed air supply, and solving the technical problem of energy waste caused by new energy system supplying air at the maximum wind speed in related technologies.

[0046] Figure 3 Schematic diagram of an indoor fresh air system according to an embodiment of the present invention, comprising: a fresh air supply port 1, a cloud digital base controller 2, a fresh air duct 3, an indoor living body 4, a return air port 5, a fresh air valve 6, a fresh air unit 7, a fresh air partition 8, a window opener 9, and a CO2 sensor 10. A large space can be divided into multiple indoor areas, each of which corresponds to a partition. Figure 3 Four partitions are shown in the figure, each partition is a target indoor area, and each partition has a fresh air supply vent and a window opener.

[0047] In one implementation of the present embodiment, obtaining the number of living bodies in the target indoor area includes: collecting operating parameters of all fixed terminals in the target indoor area through a digital base controller, wherein the digital base controller is communicatively connected with the fixed terminals; for each fixed terminal, determining whether the corresponding operating parameters meet preset conditions; counting the number of fixed terminals in the target indoor area whose operating parameters meet the preset conditions; and determining the number of terminals as the number of living bodies in the target indoor area.

[0048] Optionally, the fixed terminal is a computer, and the operating parameters include: switch state, computer power consumption, CPU occupancy rate, and mouse click frequency. The digital base controller is used to monitor the operating parameters of each fixed terminal in the cloud. In one example, the preset conditions include: the switch state is the power-on state, the computer power consumption is greater than the standby power consumption, the CPU occupancy rate is greater than the standby occupancy rate, and the mouse click frequency is greater than 1 time / min. If the preset conditions are met, the presence of a living body at the workstation of the corresponding fixed terminal is identified, and the number of living bodies in the entire target indoor area can be calculated through statistics. For example, the installation position of each computer is formed into a spatial coordinate, and the data such as computer switch, computer power consumption, CPU occupancy rate, and mouse click frequency are collected and uploaded to the cloud digital base controller to determine the spatial position coordinate data of the indoor person 4. Assuming the scenario: when an employee sits at a workstation, turns on the computer, and runs the simulation software, the computer CPU occupancy is large, or the frequency of clicking the mouse exceeds the set value within a fixed time, it can be determined that the person is at the workstation, and then the density of people in each partition is determined.

[0049] In the above scenario, each living body corresponds to a fixed terminal. In other implementations, when the target indoor area is a shopping mall, a station or other scene where people roam around, the number of living bodies in the target indoor area can also be obtained based on the wireless router and the ambient noise.

[0050] In one example, obtaining the number of live entities in the target indoor area includes: monitoring the number of first devices that send connection request signals to a wireless router in the target indoor area, and obtaining the number of second devices currently connected to the wireless router, and determining the total number of the first number of devices and the second number of devices as the number of live entities. By parsing the connection request signal, extracting the device identifier (such as IP address, MAC address) in the connection request signal, the number of device identifiers is the first number of devices.

[0051] In one example, obtaining the number of living bodies in the target indoor area includes: collecting mixed audio in the target indoor area, extracting frequency information of the mixed audio, filtering ambient audio in the mixed audio by the frequency information to obtain human voice audio, parsing timbre distribution information and loudness distribution information in the human voice audio, obtaining the number of first sound sources (the number of sounds with different timbres) in the human voice audio based on the timbre distribution information, obtaining the number of second sound sources (the number of sounds with different loudness) in the human voice audio based on the loudness distribution information, and selecting the larger number of the first sound sources and the second sound sources as the number of living bodies. If the number of first sound sources is greater than the number of second sound sources, the number of first sound sources is selected as the number of living bodies.

[0052] The above-mentioned solution using a digital base controller, a wireless router, and audio analysis can protect user privacy and reduce hardware costs. In addition, a camera can also be used to collect pixel images or infrared images, and the number of living bodies can be obtained by analyzing the images.

[0053] By adopting the solution of this embodiment, the number of living bodies in the target indoor area can be accurately counted, and then the density of living bodies in the target indoor area can be obtained, based on which the oxygen consumption and fresh air demand of the target indoor area can be accurately estimated.

[0054] In the implementation scenario of the present embodiment, controlling the ventilation state of the ventilation component in the target indoor area according to the current carbon dioxide concentration and the living body density includes: controlling the switching state of the fresh air valve in the target indoor area according to the current carbon dioxide concentration, wherein the fresh air valve is connected to the fresh air duct between the outdoor fresh air unit and the indoor fresh air supply outlet; judging whether the living body density is greater than a preset value; if the living body density is greater than the preset value, controlling the opening of the window opener in the target indoor area according to the living body density and the current carbon dioxide concentration, wherein the window opener is installed on the window of the target indoor area; wherein the ventilation component includes the fresh air valve and the window opener.

[0055] In this embodiment, the fresh air valve is used to control the fresh air unit to supply air to the indoor room through the fresh air duct. The fresh air duct supplies fresh air to each fresh air zone through each fresh air valve, and the function of the window opener is to adjust the amount of fresh air from the outside entering the room through the window, which can dilute the CO2 concentration in the indoor zone.

[0056] The CO2 sensor detects the CO2 concentration in the indoor area and uses the known CO2 concentration to actively control the fresh air valve switch. At the same time, the inherent natural conditions such as the building environment and the window opener are used to passively adjust the opening of the window opener with the outside fresh air. Through strategy coupling, when the fresh air volume brought by the fresh air valve cannot meet the changes in the population density, the set window opener ventilation is enabled to avoid the CO2 concentration detected by the CO2 sensor not being able to respond to the CO2 concentration changes caused by the changes in the living body in a timely manner. The digital base can accurately and timely count the population density and give the window opener a command to adjust the window opener opening.

[0057] In this embodiment, the amount of fresh air entering the target indoor area is collaboratively controlled by the fresh air valve and the window opener. On the basis of controlling the carbon dioxide concentration, the indoor fresh air volume can be further calibrated by the window opener. When the fresh air valve is closed or open, the air intake volume corresponding to the indoor living density can be guaranteed by controlling the opening degree of the window opener, thereby ensuring indoor air circulation and comfort while controlling energy consumption.

[0058] In another implementation scenario of this embodiment, after determining whether the living body density is greater than a preset value, the method includes: if the living body density is less than or equal to the preset value, closing the window opener in the target indoor area.

[0059] In this implementation scenario, when the indoor living density is low, the window opener is closed to reduce the outdoor environmental noise, thereby improving the indoor comfort while ensuring the indoor air instruction and circulation.

[0060] In one example, controlling the switching state of the fresh air valve in the target indoor area according to the current carbon dioxide concentration includes: determining whether the current carbon dioxide concentration is within a preset concentration range; if the current carbon dioxide concentration is not within the preset concentration range, controlling the fresh air valve in the target indoor area to be in an open state; if the current carbon dioxide concentration is within the preset concentration range, controlling the fresh air valve in the target indoor area to be in a closed state.

[0061] Optionally, the preset concentration range is 500ppm-700ppm, wherein 500ppm and 700ppm are the lower boundary and the upper boundary respectively, and 600 is the median. In one example, the fresh air supply outlet of each target indoor area is also provided with a wind speed adjustment component. When the fresh air valve is in an open state, the difference between the current carbon dioxide concentration and the median is calculated, and the wind speed adjustment component is controlled based on the difference so that the air supply speed of the fresh air supply outlet is positively correlated with the difference.

[0062] After the fresh air valve is closed, the load of the target indoor area is 0, and the power of the fresh air unit can be reduced. After the fresh air valves of all indoor areas where the fresh air units are deployed are closed, the fresh air units are shut down and then put into standby mode, thereby reducing energy consumption.

[0063] By controlling the opening and closing state of the fresh air valve, the indoor carbon dioxide concentration can be maintained in a comfortable range. At the same time, when the indoor carbon dioxide concentration is in a reasonable range, the fresh air valve is closed to save fan energy.

[0064] In one example, controlling the opening of the window opener in the target indoor area according to the living body density and the current carbon dioxide concentration includes: obtaining the historical carbon dioxide concentration of the target indoor area in the previous control cycle, and calculating the carbon dioxide production rate of the target indoor area according to the living body density; controlling the opening of the window opener in the target indoor area in the current control cycle according to the current carbon dioxide concentration, the historical carbon dioxide concentration, and the carbon dioxide production rate.

[0065] In this example, a living person is used as an example for explanation. The carbon dioxide production rate is determined by the number of people and the amount of CO2 produced per person per unit time (carbon dioxide per capita unit production rate). The carbon dioxide (CO2) production rate of each adult in the working state will vary according to the specific nature of the work and the intensity of the activity. The working state of each person can be set according to the nature of the target indoor area, such as an office as a light workplace, a shopping mall as a moderate workplace, and a gym as a heavy workplace. For example, heavy work activities (such as office work, standing operation, etc.) will cause the CO2 production rate to be slightly higher than that in the light working state. The rest state is about 0.30 liters / minute (such as office, school lunch break), the light working state: about 0.35 liters / minute (such as office work), moderate light activity (such as wandering state): about 0.5 liters / minute, and heavy activity (such as standing operation, physical labor state): about 0.75 liters / minute. The same place may be in different or the same state at different time periods. For example, people in the office are in a resting state at noon, while people in other time periods (such as 9:00-12:00) are in a light working state, while people in the gym are in a heavy activity state all day long.

[0066] In one example, calculating the carbon dioxide production rate of the target indoor area based on the living body density includes: determining the site properties and the current time period of the target indoor area, searching for the per capita unit production rate of carbon dioxide in the target indoor area based on the site properties and the current time period, and calculating the carbon dioxide production rate of the target indoor area using the living body density, the volume of the target indoor area, and the per capita unit production rate of carbon dioxide.

[0067] In this embodiment, the current carbon dioxide concentration and the historical carbon dioxide concentration can be used to calculate the real-time increment of the carbon dioxide concentration in the target indoor area.

[0068] The solution of this example is adopted to quickly calibrate the CO2 concentration using the current carbon dioxide concentration, the historical carbon dioxide concentration, and the carbon dioxide production rate, and then control the opening of the window opener in the target indoor area in the current control cycle. As the density of living organisms changes periodically, the opening of the window opener is periodically controlled to ensure the balance of the indoor carbon dioxide concentration, ensure the stability of the indoor air quality, and prevent the indoor air volume from being too large or too small.

[0069] Optionally, controlling the opening of the window opener in the target indoor area in the current control cycle according to the current carbon dioxide concentration, the historical carbon dioxide concentration, and the carbon dioxide production rate includes: calculating the required ventilation air volume L in the target indoor area using the following formula: Wherein, x is the carbon dioxide production rate, y1 is the current carbon dioxide concentration, and y2 is the historical carbon dioxide concentration; the opening degree of the window opener in the target indoor area in the current control cycle is controlled based on the required ventilation air volume.

[0070] Figure 4 This is the principle diagram of the indoor CO2 ventilation model in the embodiment of the present invention, where the indoor volume is vf, L: window opener ventilation volume; y1(y): current CO2 concentration; y0: CO2 concentration at the previous moment; x: carbon dioxide production rate based on the population density; τ: time, Exp() is a natural exponential function. The function of the indoor CO2 ventilation model is:

[0071]

[0072] By deduction, we can conclude that:

[0073] Based on dimensional analysis, in the formula In the formula, the numerator is g / s and the denominator is g / m3. The final fractional result is m3 / s, which is the required ventilation volume, that is, the ventilation volume of the window opener that needs to be adjusted by the opening degree.

[0074] Optionally, controlling the opening of the window opener in the target indoor area in the current control cycle based on the required ventilation volume includes: determining the real-time wind speed of the outdoor ambient wind in the target indoor area, calculating the air flow per unit volume based on the real-time wind speed, and calculating the opening of the window opener in the current control cycle according to the required ventilation volume and the air flow, wherein the opening is negatively correlated with the air flow, and the opening is positively correlated with the required ventilation volume.

[0075] By adopting the solution of this embodiment, the change in carbon dioxide concentration between the previous and subsequent cycles and the carbon dioxide production rate are used to calculate the required ventilation air volume at the current time, thereby improving the accuracy of the required ventilation air volume, and then accurately controlling the opening of the window opener, which can not only quickly dilute the CO2 concentration, but also save the ventilation energy consumption of the fresh air fan.

[0076] The solution of this embodiment provides an active and passive combined ventilation and air-conditioning system and control method. First, it detects whether the CO2 concentration is within the normal range to actively adjust the switch of the fresh air valve in each partition. Secondly, the personnel density data perceived by the real-time usage of the user's computer is uploaded to the cloud digital base controller. By passively adjusting the opening of the window opener in each partition, an active and passive combined ventilation mixed ventilation mode is realized, making the system more energy-efficient. Figure 5 is a logic diagram of indoor fresh air control in an embodiment of the present invention, wherein the Wells-riley model of this embodiment is a dilution model for CO2. The principle of the Wells-riley model is shown in Figure 4 The mixed ventilation mode refers to a mixed ventilation mode that combines the fresh air duct to deliver fresh air and the window opener to deliver free fresh air from the outside.

[0077] By adopting the solution of this embodiment, the population density information is obtained through the cloud-based digital base controller, and the controller intelligently adjusts the opening of the window opener to change the outdoor fresh air volume by outputting the population information control signal. Compared with the traditional fixed fresh air volume mode, the present invention intelligently provides fresh air volume by area and according to the number of people. While reasonably meeting the fresh air needs of people in each area, it also reduces the energy consumption of the system and solves the problem of energy waste.

[0078] The solution of this embodiment only needs to collect the usage of the workstation computer, which not only avoids the infringement of personnel privacy, but also has the characteristics of retaining usage memory and being able to respond in real time by uploading it to the cloud in real time, which can provide a fast and accurate judgment basis for estimating the actual number of people in each partition; the cloud-based digital base controller used to replace the original camera has the advantages of low application cost, high integration, strong scalability, convenient setting and wide application range. Therefore, the method of controlling the main air valve of the main air duct of the ventilation system and the end air valve of each air outlet through the cloud-based digital base controller to give the air supply volume can be directly realized in the existing indoor places with a slight modification, which is more cost-effective than redesigning and installing a set of intelligent ventilation systems.

[0079] By installing environmental parameter sensors in areas where people move around or are close to them, it is possible to monitor environmental parameters such as indoor carbon dioxide concentration in real time, thereby calibrating and calculating whether the amount of fresh air brought in by the window opener is within a reasonable range, providing an environmental basis for the intelligent control of the ventilation system, and solving the problems of unreasonable ventilation in public places and the inability to dilute harmful substances in a timely manner.

[0080] Through the description of the above implementation methods, those skilled in the art can clearly understand that the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, or the part that contributes to the prior art, can be embodied in the form of a software product, which is stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk), and includes a number of instructions for a terminal device (which can be a mobile phone, a computer, a fresh air device, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0081] Example 2

[0082] In this embodiment, a fresh air device is also provided, which is used to implement the above embodiments and preferred implementations, and the descriptions that have been made will not be repeated. As used below, the term "module" can implement a combination of software and hardware for the reservation function. Although the device described in the following embodiments is preferably implemented in software, the implementation of hardware, or a combination of software and hardware, can also be conceived.

[0083] Figure 6 is a structural block diagram of a fresh air device according to an embodiment of the present invention, such as Figure 6 As shown, the fresh air device includes: a controller 60 and a ventilation component 62, wherein the controller includes:

[0084] An acquisition module 600 is used to acquire the current carbon dioxide concentration in the target indoor area and the number of living bodies in the target indoor area;

[0085] A calculation module 602 is used to calculate the density of living bodies in the target indoor area according to the number of living bodies;

[0086] The control module 604 is used to control the ventilation state of the ventilation components in the target indoor area according to the current carbon dioxide concentration and the living body density.

[0087] Optionally, the acquisition module includes: a collection unit, used to collect operating parameters of all fixed terminals in the target indoor area through a digital base controller, wherein the digital base controller is communicatively connected to the fixed terminals; a judgment unit, used to judge whether the corresponding operating parameters of each fixed terminal meet preset conditions; a statistical unit, used to count the number of fixed terminals in the target indoor area whose operating parameters meet preset conditions; and a determination unit, used to determine the number of terminals as the number of living bodies in the target indoor area.

[0088] Optionally, the control module includes: a first control unit, used to control the switching state of the fresh air valve in the target indoor area according to the current carbon dioxide concentration, wherein the fresh air valve is connected to the fresh air duct between the outdoor fresh air unit and the indoor fresh air supply outlet; a judgment unit, used to judge whether the living body density is greater than a preset value; a second control unit, used to control the opening of the window opener in the target indoor area according to the living body density and the current carbon dioxide concentration if the living body density is greater than the preset value, wherein the window opener is installed on the window of the target indoor area; wherein the ventilation component includes the fresh air valve and the window opener.

[0089] Optionally, the first control unit includes: a judgment subunit, used to judge whether the current carbon dioxide concentration is within a preset concentration range; a control subunit, used to control the fresh air valve of the target indoor area to an open state if the current carbon dioxide concentration is not within the preset concentration range; if the current carbon dioxide concentration is within the preset concentration range, control the fresh air valve of the target indoor area to a closed state.

[0090] Optionally, the second control unit includes: an acquisition subunit, used to acquire the historical carbon dioxide concentration of the target indoor area in the previous control cycle, and calculate the carbon dioxide production rate of the target indoor area based on the living body density; a control subunit, used to control the opening of the window opener in the target indoor area in the current control cycle based on the current carbon dioxide concentration, the historical carbon dioxide concentration, and the carbon dioxide production rate.

[0091] Optionally, the control subunit is further used to: calculate the required ventilation air volume L in the target indoor area using the following formula: Wherein, x is the carbon dioxide production rate, y1 is the current carbon dioxide concentration, and y2 is the historical carbon dioxide concentration; the opening degree of the window opener in the target indoor area in the current control cycle is controlled based on the required ventilation air volume.

[0092] Optionally, the control module includes: a closing unit, configured to close the window opener in the target indoor area if the living body density is less than or equal to the preset value after the judging unit judges whether the living body density is greater than a preset value.

[0093] It should be noted that the above modules can be implemented by software or hardware. For the latter, it can be implemented in the following ways, but not limited to: the above modules are all located in the same processor; or the above modules are located in different processors in any combination.

[0094] Example 3

[0095] An embodiment of the present invention further provides a storage medium, in which a computer program is stored, wherein the computer program is configured to execute the steps of any of the above method embodiments when running.

[0096] Optionally, in this embodiment, the above storage medium may be configured to store a computer program for executing:

[0097] S1, obtaining the current carbon dioxide concentration in the target indoor area, and obtaining the number of living bodies in the target indoor area;

[0098] S2, calculating the density of living organisms in the target indoor area according to the number of living organisms;

[0099] S3, controlling the ventilation state of the ventilation components in the target indoor area according to the current carbon dioxide concentration and the living body density.

[0100] Optionally, in this embodiment, the above-mentioned storage medium may include but is not limited to: a USB flash drive, a read-only memory (ROM), a random access memory (RAM), a mobile hard disk, a magnetic disk or an optical disk, and other media that can store computer programs.

[0101] An embodiment of the present invention further provides an electronic device, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0102] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0103] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0104] S1, obtaining the current carbon dioxide concentration in the target indoor area, and obtaining the number of living bodies in the target indoor area;

[0105] S2, calculating the density of living organisms in the target indoor area according to the number of living organisms;

[0106] S3, controlling the ventilation state of the ventilation components in the target indoor area according to the current carbon dioxide concentration and the living body density.

[0107] Optionally, the specific examples in this embodiment may refer to the examples described in the above embodiments and optional implementation modes, and this embodiment will not be described in detail here.

[0108] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0109] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0110] In the several embodiments provided in this application, it should be understood that the disclosed technical content can be implemented in other ways. Among them, the device embodiments described above are only schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0111] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0112] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0113] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, a controller or a network device, etc.) to perform all or part of the steps of each embodiment method of the present application. The aforementioned storage medium includes: U disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), mobile hard disk, disk or optical disk, etc., various media that can store program codes.

[0114] The above are only preferred implementations of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. A method for controlling indoor fresh air, characterized in that: include: Obtaining a current carbon dioxide concentration in a target indoor area, and obtaining a number of living bodies in the target indoor area; Calculating the density of living organisms in the target indoor area according to the number of living organisms; The ventilation state of the ventilation components in the target indoor area is controlled according to the current carbon dioxide concentration and the living body density.

2. The method according to claim 1, characterized in that: Obtaining the number of living bodies in the target indoor area includes: Collecting operating parameters of all fixed terminals in the target indoor area through a digital base controller, wherein the digital base controller is in communication connection with the fixed terminals; For each fixed terminal, determine whether the corresponding operating parameters meet the preset conditions; Counting the number of fixed terminals whose operating parameters meet preset conditions in the target indoor area; The number of terminals is determined as the number of living bodies in the target indoor area.

3. The method according to claim 1, characterized in that Controlling the ventilation state of the ventilation component in the target indoor area according to the current carbon dioxide concentration and the living body density includes: Controlling the on / off state of the fresh air valve in the target indoor area according to the current carbon dioxide concentration, wherein the fresh air valve is connected to the fresh air duct between the outdoor fresh air unit and the indoor fresh air supply outlet; Determining whether the living body density is greater than a preset value; If the living body density is greater than a preset value, controlling the opening degree of a window opener in the target indoor area according to the living body density and the current carbon dioxide concentration, wherein the window opener is installed on a window of the target indoor area; Wherein, the ventilation component includes the fresh air valve and the window opener.

4. The method according to claim 3, characterized in that Controlling the switch state of the fresh air valve in the target indoor area according to the current carbon dioxide concentration includes: Determining whether the current carbon dioxide concentration is within a preset concentration range; If the current carbon dioxide concentration is not within the preset concentration range, the fresh air valve of the target indoor area is controlled to be in an open state; if the current carbon dioxide concentration is within the preset concentration range, the fresh air valve of the target indoor area is controlled to be in a closed state.

5. The method according to claim 3, characterized in that: Controlling the opening degree of the window opener in the target indoor area according to the living body density and the current carbon dioxide concentration includes: Obtaining a historical carbon dioxide concentration of the target indoor area in a previous control cycle, and calculating a carbon dioxide production rate of the target indoor area according to the living body density; The opening degree of the window opener in the target indoor area in the current control cycle is controlled according to the current carbon dioxide concentration, the historical carbon dioxide concentration, and the carbon dioxide production rate.

6. The method according to claim 5, characterized in that Controlling the opening of the window opener in the target indoor area in the current control cycle according to the current carbon dioxide concentration, the historical carbon dioxide concentration, and the carbon dioxide production rate includes: The required ventilation air volume L in the target indoor area is calculated using the following formula: Wherein, x is the carbon dioxide production rate, y1 is the current carbon dioxide concentration, and y2 is the historical carbon dioxide concentration; The opening degree of the window opener in the target indoor area in the current control cycle is controlled based on the required ventilation air volume.

7. The method according to claim 3, characterized in that After determining whether the living body density is greater than a preset value, the method includes: If the living body density is less than or equal to a preset value, the window opener in the target indoor area is closed.

8. A fresh air device, characterized in that: The fresh air device comprises: a controller and a ventilation component, wherein the controller comprises: An acquisition module, used to acquire the current carbon dioxide concentration in the target indoor area, and acquire the number of living bodies in the target indoor area; A calculation module, used for calculating the density of living bodies in the target indoor area according to the number of living bodies; A control module is used to control the ventilation state of the ventilation components in the target indoor area according to the current carbon dioxide concentration and the living body density.

9. A storage medium, characterized in that: A computer program is stored in the storage medium, wherein the computer program is configured to execute the steps of the indoor fresh air control method in any one of claims 1 to 7 when running.

10. An electronic device comprising a processor, a communication interface, a memory and a communication bus, wherein: The processor, the communication interface, and the memory communicate with each other via a communication bus; wherein: Memory, used to store computer programs; A processor is used to execute the steps of the indoor fresh air control method according to any one of claims 1 to 7 by running a program stored in a memory.

Images