A new type of indoor air environment control system

Abstract

The present invention discloses an indoor air environment control system and method, which controls one or more of the ventilation volume of a fresh air main unit, the cooling / heating capacity of an air conditioner, and the humidification amount of a humidifier / the dehumidification amount of a dehumidifier according to the indoor air detection value and the outdoor air detection value. The indoor air environment control system and method disclosed by the present invention automatically adjusts the fresh air volume of the fresh air main unit according to the indoor and outdoor environments, making the indoor air more comfortable and of higher quality. The efficiency of the air conditioner, humidifier, dehumidifier, etc. is dynamically adjusted according to the fresh air volume of the fresh air main unit, making the indoor air parameter fluctuations smaller, and at the same time reducing the overall energy consumption of the system.

Description

Technical Field

[0001] The present invention relates to an indoor air environment control system and method, belonging to the technical field of air purification. Background Art

[0002] For a traditional fresh air system, during installation and operation, only the indoor area is considered, and the air quality indoors and outdoors is not analyzed. The air exchange volume of the fresh air main unit remains constant or is only adjusted manually, resulting in large fluctuations in indoor air quality and the situation where indoor air quality changes with outdoor air quality.

[0003] In addition, for a traditional fresh air system, only outdoor air is filtered and purified, without considering the impact of changes in indoor air temperature, humidity, etc. on human comfort. People generally add independent air conditioners, humidifiers, dehumidifiers, etc. to make secondary adjustments to indoor temperature, humidity, etc.

[0004] This leads to the independent operation of the fresh air main unit and air conditioners, humidifiers, dehumidifiers, etc. There is no cooperation between these devices. Since the air exchange volume of the fresh air main unit affects indoor temperature and humidity, there will be a delay in the adjustment of indoor air by air conditioners, humidifiers, dehumidifiers, etc., that is, the adjustment is made after fluctuations in indoor temperature, humidity, etc., resulting in poor user experience.

[0005] Moreover, the delay in adjustment often brings about the problem of excessive temperature or humidity adjustment, further leading to fluctuations in indoor temperature, humidity, etc., not only reducing comfort but also increasing energy consumption.

[0006] Therefore, there is an urgent need to design a new type of indoor air environment control system and method. Summary of the Invention

[0007] To overcome the above problems, the inventor has conducted intensive research. On the one hand, an indoor air environment control system is designed, as Figure 1 shown, including a fresh air main unit and a controller. The fresh air main unit exchanges outdoor air and indoor air.

[0008] An air conditioner and an indoor detector are arranged indoors, and indoor air detection values are obtained through the indoor detector.

[0009] An outdoor detector is arranged outdoors, and outdoor air detection values are obtained through the outdoor detector.

[0010] The controller is respectively communicatively connected to the fresh air main unit, the air conditioner, the humidifier, the indoor detector, and the outdoor detector.

[0011] The air detection values include temperature, humidity, and PM2.5.

[0012] Further, the indoor air detection values further include carbon dioxide concentration and TVOC value;

[0013] A humidifier, a dehumidifier, and an air purifier are provided indoors.

[0014] In a preferred embodiment, the indoor detector is placed in the controller, and a people counting device is also provided indoors.

[0015] On the other hand, the present invention also provides an indoor air environment control method, as Figure 2 shown, preferably implemented by using the above indoor air environment control system, and characterized in that the method includes:

[0016] Set indoor standard air parameters, outdoor abnormal standards, and indoor abnormal standards;

[0017] Obtain indoor air detection values and outdoor air detection values;

[0018] Control the ventilation volume of the fresh air main unit, the cooling / heating capacity of the air conditioner, the humidification amount of the humidifier, or the dehumidification amount of the dehumidifier according to the indoor air detection values and outdoor air detection values, so that the indoor air parameters meet the indoor standard air parameters;

[0019] The indoor standard air parameters, representing a human-comfortable air environment, include a comfortable temperature and a comfortable humidity;

[0020] The outdoor abnormal standards include outdoor PM2.5,

[0021] The indoor abnormal standards include indoor PM2.5, indoor carbon dioxide concentration, and indoor TVOC value.

[0022] In a preferred embodiment, the method further includes: obtaining the number of people indoors;

[0023] Control the ventilation volume of the fresh air main unit according to the outdoor air detection values, indoor air detection values, and the number of people indoors.

[0024] In a preferred embodiment, when the detected outdoor air PM2.5 is higher than the PM2.5 in the outdoor abnormal standards, and the indoor air carbon dioxide concentration detection value is lower than the carbon dioxide concentration in the indoor abnormal standards and the indoor air TVOC detection value is lower than the TVOC value in the indoor abnormal standards, the ventilation volume of the fresh air main unit is a low ventilation volume Q L , and the low ventilation volume is the ventilation volume Q L is 25n - 35n cubic meters per hour, where n represents the number of people indoors;

[0025] When the detected outdoor air PM2.5 is lower than the PM2.5 in the outdoor abnormal standard and the detected values of indoor air carbon dioxide concentration and TVOC are respectively lower than the carbon dioxide concentration and TVOC value in the indoor abnormal standard, the ventilation volume of the fresh air main unit is the high ventilation volume Q H , and the high ventilation volume Q H is at least 1.5 times of the low ventilation volume Q L , preferably Q H = s * h cubic meters per hour, where s represents the total indoor area and h represents the indoor floor height;

[0026] When the detected value of indoor air carbon dioxide concentration is higher than the carbon dioxide concentration in the indoor abnormal standard or the detected value of indoor air TVOC is higher than the TVOC value in the indoor abnormal standard, the fresh air main unit is at the maximum ventilation volume Q F , and the maximum ventilation volume Q F refers to the maximum designed ventilation volume of the fresh air main unit or the maximum ventilation volume that can be achieved when the fresh air main unit outputs air with PM2.5 not greater than 50 μg / m 3 .

[0027] In a preferred embodiment, when the ventilation volume of the fresh air main unit changes or the outdoor air temperature changes, the air conditioner power changes simultaneously to adjust the indoor air temperature in advance; and / or

[0028] When the ventilation volume of the fresh air main unit changes, the power of the humidifier or dehumidifier changes simultaneously to adjust the indoor air humidity in advance.

[0029] In a preferred embodiment, the cooling / heating capacity of the air conditioner is obtained according to the ventilation volume of the fresh air main unit to keep the indoor air temperature stable; and / or

[0030] The humidifying amount of the humidifier or the dehumidifying amount of the dehumidifier is obtained according to the ventilation volume of the fresh air main unit to keep the indoor air humidity stable.

[0031] In a preferred embodiment, the cooling / heating capacity of the air conditioner can be expressed as Q a ±10% joules per hour:

[0032] Q a = |m in - s t | * csh + |m out - s t | * cQ - |m os - s t | * cQ

[0033] m os = (m out - |m in - s t | * η t)-s t

[0034] where m in represents the indoor temperature detection value, s t represents the comfortable temperature, m out represents the outdoor temperature detection value, Q represents the fresh air volume of the fresh air main unit, m os represents the detection value of the supply air temperature after the outdoor air passes through the heat recovery of the fresh air main unit;;

[0035] c represents the heat required for 1 cubic meter of air to change by 1 degree, which is a constant; η t represents the temperature recovery efficiency of the fresh air main unit, which can be obtained according to the factory parameters, s represents the total indoor area, and h represents the indoor floor height.

[0036] In a preferred embodiment, if the PM2.5 detection value in the indoor air detection value is greater than the warning value, the purifier operates at full power; if the indoor PM2.5 detection value is less than the warning value, the purifier operates at low power, and the low power is 30% - 60% of the full power.

[0037] The indoor air environment control system and method of the present invention have the following beneficial effects:

[0038] (1) According to the indoor air environment control system and method provided by the present invention, the fresh air volume of the fresh air main unit is automatically adjusted according to the indoor and outdoor environments, making the indoor air more comfortable and the air quality higher;

[0039] (2) According to the indoor air environment control system and method provided by the present invention, the performance of the air conditioner, humidifier, dehumidifier, etc. is dynamically adjusted according to the fresh air volume of the fresh air main unit, making the indoor air parameters fluctuate less and reducing the overall energy consumption of the system at the same time. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 Shows a schematic structural diagram of an indoor air environment control system in a preferred embodiment;

[0041] Figure 2 Shows a schematic flow diagram of an indoor air environment control method in a preferred embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0042] The present invention will be further described in detail below with reference to the drawings. Through these descriptions, the features and advantages of the present invention will become more clear and definite.

[0043] On the one hand, the present invention provides a fresh air system, including a fresh air main unit and a controller, and the fresh air main unit exchanges outdoor air with indoor air.

[0044] Further, an air conditioner and an indoor detector are provided indoors. The temperature indoors is adjusted by the air conditioner, and the indoor air detection value is obtained through the indoor detector.

[0045] An outdoor detector is provided outdoors, and the outdoor air detection value is obtained through the outdoor detector;

[0046] The controller is communicatively connected to the fresh air main unit, the air conditioner, the humidifier, the indoor detector, and the outdoor detector.

[0047] In the present invention, by communicatively connecting the controller with other devices, the system can integrate each device, and then combine the independent devices into a whole to work together, avoiding the indoor environment fluctuations caused by the separate operation of each device, and at the same time achieving the effects of energy conservation and efficiency improvement.

[0048] The air detection value includes temperature, humidity, and PM2.5.

[0049] Further, the indoor air detection value further includes a carbon dioxide concentration detection value and a TVOC detection value;

[0050] Preferably, a humidifier, a dehumidifier, and an air purifier are provided indoors. The air purifier is used to purify the air and reduce the PM2.5 and TVOC values in the air.

[0051] In a preferred embodiment, the indoor detector is placed in the controller.

[0052] In the present invention, the specific structures of the indoor detector, the outdoor detector, and the controller are not particularly limited as long as the above functions can be achieved. For example, the indoor detector can be a detection device including a temperature and humidity sensor, a particulate matter sensor, a TVOC sensor, and a carbon dioxide sensor.

[0053] In a preferred embodiment, a personnel detection device is further provided indoors for detecting the number of people indoors. In the present invention, the specific method of personnel detection is not particularly limited, and it can be manually input or any known personnel detection method can be adopted, such as image recognition detection through a home camera, infrared heat source detection, etc. Preferably, infrared detection is used, which has the advantages of small size, low cost, and convenient installation.

[0054] It should be noted that in the present invention, the humidifier, the dehumidifier, and the air purifier can be an independent device or a module provided on the air conditioner or the fresh air main unit as long as the above functions can be achieved.

[0055] On the other hand, the present invention provides a smart control method for a fresh air system, preferably implemented by using the above fresh air system. The method includes:

[0056] Set indoor standard air parameters, outdoor abnormal standards, and indoor abnormal standards;

[0057] Obtain indoor air detection values and outdoor air detection values;

[0058] Control one or more of the ventilation volume of the fresh air main unit, the cooling / heating capacity of the air conditioner, and the humidification volume of the humidifier / dehumidification volume of the dehumidifier according to the indoor air detection value and the outdoor air detection value, so that the indoor air parameters meet the indoor standard air parameters.

[0059] In traditional fresh air systems, the fresh air main unit, air conditioner, etc. operate independently. After the fresh air system exchanges air, especially when there is a large difference in temperature and humidity between indoors and outdoors, the fresh air system often causes the indoor temperature to rise / fall and the indoor humidity to change significantly after air exchange. And devices such as air conditioners, humidifiers, and dehumidifiers will only be turned on after detecting changes in indoor air, resulting in large fluctuations in indoor air and affecting the comfort of the human body, with a poor experience.

[0060] In the present invention, by coordinating and adjusting multiple devices, the above problems are expected to be solved.

[0061] According to the present invention, the indoor standard air parameters represent a comfortable air environment for the human body, including a comfortable temperature and a comfortable humidity.

[0062] According to the present invention, the indoor standard air parameters can be factory preset values or user-defined values. Preferably, they are values selected from the specified values in the indoor air quality standard (GB / T 18883-2002) in the national standard.

[0063] The outdoor abnormal standard is used to represent the outdoor air quality abnormal standard, including outdoor PM2.5. Preferably, in the outdoor abnormal standard, the outdoor PM2.5 is 300 ug / m 3 ;

[0064] The indoor abnormal standard includes indoor PM2.5, indoor carbon dioxide concentration, and indoor TVOC value, and is used to represent the indoor air quality abnormal standard. Preferably, in the indoor abnormal standard, the indoor PM2.5 is 115, the indoor carbon dioxide concentration is 600 ppm, and the indoor TVOC value is 0.5 mg / m 3 .

[0065] In a preferred embodiment, the method further includes: obtaining the number of people indoors.

[0066] In the present invention, there is no special limitation on the specific method of obtaining the number of people indoors. It can be manually entered into the controller or identified by a people counting device.

[0067] Furthermore, the ventilation volume of the fresh air main unit is controlled according to the outdoor air detection value, the indoor air detection value, and the number of people indoors.

[0068] The inventors found that the number of people has a stable and obvious impact on indoor air quality, especially on the carbon dioxide content in the air. In the present invention, by obtaining the number of people indoors and adjusting the ventilation volume of the fresh air system together with the indoor and outdoor environments, the control of indoor air quality becomes more precise.

[0069] Specifically, the ventilation volume of the fresh air main unit is obtained in the following manner:

[0070] When the detected outdoor air PM2.5 is higher than the PM2.5 in the outdoor abnormal standard, and the indoor air carbon dioxide concentration detection value is lower than the carbon dioxide concentration in the indoor abnormal standard, and the indoor air TVOC detection value is lower than the TVOC value in the indoor abnormal standard, the ventilation volume of the fresh air main unit is the low ventilation volume Q L , and the low ventilation volume is the ventilation volume Q L which is 25n - 35n cubic meters per hour, where n represents the number of people indoors;

[0071] That is, when the outdoor air condition is poor and the indoor environment is good, under the condition of having little impact on human comfort, the ventilation volume of the fresh air main unit is actively reduced, which not only avoids the negative impact of outdoor air on indoor air, but also reduces the load on the fresh air main unit filter, greatly improving the service life of the fresh air main unit filter and enhancing the user experience.

[0072] Furthermore, the minimum ventilation volume value is obtained by the inventors through a large number of experiments, which can ensure human comfort. Moreover, the minimum ventilation volume is adjusted according to the number of people indoors, with strong adaptability and stability.

[0073] When the detected outdoor air PM2.5 is lower than the PM2.5 in the outdoor abnormal standard, and the indoor air carbon dioxide concentration detection value and the TVOC detection value are respectively lower than the carbon dioxide concentration and the TVOC value in the indoor abnormal standard, the ventilation volume of the fresh air main unit is the high ventilation volume Q H , and the high ventilation volume Q H is at least 1.5 times the low ventilation volume Q L , preferably Q H = s * h cubic meters per hour, where s represents the total indoor area and h represents the indoor floor height;

[0074] That is, when the indoor and outdoor air conditions are good, the fresh air main unit performs high ventilation volume to ensure the freshness of indoor air, improve the cleanliness of the human living environment, and enhance the anti-pollution ability of the indoor environment.

[0075] When the detected value of the carbon dioxide concentration in the indoor air is higher than the carbon dioxide concentration in the indoor abnormal standard or the detected value of the TVOC in the indoor air is higher than the TVOC value in the indoor abnormal standard, the fresh air main unit operates at the maximum ventilation volume Q F for a period of time, and the maximum ventilation volume Q F refers to the maximum designed ventilation volume of the fresh air main unit or the maximum ventilation volume that can be achieved when the PM2.5 of the air output by the fresh air main unit is not greater than 50 μg / m 3 ; that is, when the indoor air quality is poor, the fresh air main unit operates at full power, and under the condition of ensuring the ventilation and filtration effect, the indoor air is replaced as soon as possible to ensure the indoor air quality;

[0076]

[0077] Preferably, the period of time is the time used to replace the indoor air volume. For example, if the indoor space is 100 cubic meters and the maximum ventilation volume of the fresh air main unit is 100 cubic meters per hour, the period of time is 1 hour.

[0078] In the present invention, when the detected value of the indoor air or the detected value of the outdoor air changes, according to the detected value of the indoor air and the detected value of the outdoor air, two or more of the treatment amounts such as the ventilation volume of the fresh air main unit, the cooling / heating capacity of the air conditioner, the purification amount of the air purifier, and the humidification amount of the humidifier are controlled to change, so that the fresh air main unit, the air conditioner, the air purifier, and / or the humidifier simultaneously adjust their efficiencies.

[0079] Specifically, since the ventilation volume of the fresh air main unit and the outdoor air temperature and humidity will indirectly affect the indoor temperature and humidity. For example, when the outdoor temperature is higher than the indoor temperature, the ventilation of the fresh air main unit will cause the indoor air temperature to rise slowly. In the traditional fresh air system, the temperature adjustment and humidity adjustment are carried out separately. Only when the indoor temperature exceeds the set stability by a certain amount, or when the indoor humidity exceeds the set humidity by a certain amount, the air conditioner or the humidifier and dehumidifier will start to work, resulting in large fluctuations in the indoor temperature and humidity and large hysteresis in the adjustment of temperature and humidity, which affects the user experience.

[0080] In the present invention, when the ventilation volume of the fresh air main unit changes or the outdoor air temperature changes, the power of the air conditioner changes simultaneously to adjust the indoor air temperature in advance; and / or

[0081] when the ventilation volume of the fresh air main unit changes, the power of the humidifier or dehumidifier changes simultaneously to adjust the indoor air humidity in advance.

[0082] ​Furthermore, the size of the fresh air main unit's air exchange volume can also affect indoor temperature, humidity, and other air quality indicators. For example, when the outdoor temperature is relatively high, if the fresh air main unit switches from the minimum air exchange volume to the maximum air exchange volume, it will cause a sharp rise in indoor temperature. In traditional fresh air systems, the air conditioner will start cooling after the indoor temperature rises, and the cooling capacity is only determined by the difference between the indoor temperature and the set temperature. However, due to the large air exchange volume of the fresh air main unit, which has a heating effect on the indoor environment, in traditional fresh air systems, it is very easy to have the problem that the cooling capacity of the air conditioner is too small, resulting in a slow cooling speed, or even the cooling capacity of the air conditioner balances with the heat supply of the fresh air main unit, making it impossible to lower the temperature to the standard set temperature.

[0083] In the present invention, the cooling / heating capacity of the air conditioner is obtained according to the air exchange volume of the fresh air main unit, so as to stabilize the indoor air temperature; and / or

[0084] The humidification amount of the humidifier or the dehumidification amount of the dehumidifier is obtained according to the air exchange volume of the fresh air main unit, so as to stabilize the indoor air humidity.

[0085] In one embodiment, when the air exchange volume of the fresh air main unit changes, the output frequency of the air conditioner compressor is adjusted at a change rate of 2 - 4 Hz / time, avoiding large fluctuations in the compressor frequency, maintaining the smooth operation and energy-saving effect of the air conditioner, and keeping the air conditioner running stably and energy-efficiently with low noise.

[0086] In a preferred embodiment, the cooling / heating capacity of the air conditioner can be expressed as Q a ±10% joules per hour:

[0087]

[0088] wherein, m in represents the detected value of indoor temperature, s t represents the comfortable temperature, m out represents the detected value of outdoor temperature, Q represents the air exchange volume of the fresh air main unit; m os represents the detected value of the supply air temperature after the outdoor air passes through the heat recovery of the fresh air main unit;

[0089] c represents the heat required for 1 cubic meter of air to change by 1 degree, which is a constant, preferably taken as 1290; η t represents the temperature recovery efficiency of the fresh air main unit, which can be obtained according to the factory parameters, s represents the total indoor area, and h represents the indoor floor height.

[0090] In a preferred embodiment, the humidification amount or dehumidification amount is obtained according to the difference between the indoor air humidity and the standard humidity, the difference between the outdoor air humidity and the standard humidity, and the fresh air exchange volume.

[0091] Further preferably, the humidification amount or dehumidification amount can be expressed as m ± 10% grams per hour:

[0092] m = 1.2 * (p wos - p ws ) * Q + sh * (p win - p ws ) * 1.2 (Two)

[0093] Wherein, Q represents the fresh air main machine ventilation volume, p wos represents the detected value of the supply air humidity after the outdoor air is recycled by the fresh air main machine, p win represents the indoor air humidity, p ws represents the comfortable humidity.

[0094] In a preferred embodiment, when the fresh air main machine has a low ventilation volume, to ensure the indoor air quality, the purifier is turned on.

[0095] Furthermore, if the PM2.5 detected value in the indoor air detection value is greater than the warning value, the purifier operates at full power; if the indoor PM2.5 detected value is less than the warning value, the purifier operates at low power, and the low power is 30% - 60% of the full power.

[0096] Preferably, the warning value is 60 - 90 ug / m 3 .

[0097] In a preferred embodiment, if the TVOC value in the indoor air detection value is higher than the TVOC value in the indoor abnormal standard, while the fresh air main machine operates at the maximum ventilation volume, the purifier is turned on. Preferably, if the PM2.5 in the indoor air detection value is lower than the warning value at this time, the purifier operates at low power; if the PM2.5 in the indoor air detection value is higher than the warning value, the purifier operates at full power to more quickly improve the indoor air quality.

[0098] In a preferred embodiment, the fresh air system can also be connected to the cloud to obtain the local weather forecast from the cloud. When haze or sandstorm weather is forecasted, according to the weather forecast time, the ventilation volume of the fresh air main machine is adjusted 1 - 2 hours in advance and operates at the maximum ventilation volume for 1 - 2 hours to improve the indoor air quality in advance.

[0099] In a preferred embodiment, when rain is forecasted, before the forecasted rain time, the indoor humidity is maintained at 40% - 50% through a humidifier or a dehumidifier to avoid the rapid increase in indoor air humidity after rain and the indoor air humidity exceeding 60%, which causes a decrease in human comfort.

[0100] For better illustration, an example of a family gathering during winter haze is given for illustration:

[0101] The indoor area of the family is 150 ㎡, the indoor floor height is 3 m, there are 7 people in total, and the maximum designed ventilation volume of the fresh air main machine is 600 m 3 / h, the indoor comfortable temperature is set at 25°C, and the comfortable humidity is 40% - 60%. In the outdoor abnormal standard, the outdoor PM2.5 is 300 ug / m 3 , in the indoor abnormal standard, the indoor PM2.5 is 115, the indoor carbon dioxide concentration is 600 ppm, and the indoor TVOC value is 0.5 mg / m 3 .

[0102] When the fresh air system detects that the outdoor PM2.5 < 300 ug / m 3 and the indoor PM2.5 is lower than 115, the fresh air main unit exchanges air at a high ventilation rate (450 m 3 / h fresh air volume); the air conditioner heats according to Equation (1), the indoor temperature is maintained at 25°C, and the humidifier humidifies according to Equation (2), and the indoor humidity is maintained at 50%.

[0103] As the outdoor haze gradually becomes severe, when the outdoor PM2.5 > 300 ug / m 3 , the fresh air main unit switches to a low ventilation rate (at 30 m 3 / h per person, that is, 210 m 3 / h fresh air volume) for air exchange, the purifier is turned on for purification to purify the indoor air in advance. At this time, the indoor air PM2.5 is less than the warning value, and the purifier operates at a low power to prevent the decline of indoor air cleanliness. At the same time, due to the reduction of fresh air volume, the air conditioner reduces the heating capacity according to the heat change in Equation (1) to balance the temperature fluctuation caused by the change in fresh air exchange volume, and the humidifier humidifies according to Equation (2) to balance the indoor humidity.

[0104] As the haze worsens, due to the poor sealing effect of doors and windows, etc., the indoor PM2.5 gradually increases. When PM2.5 > 35 μg / m 3 , the purifier operates at full power for the purification function to ensure the indoor air quality.

[0105] If the outdoor haze gradually dissipates, when the fresh air system detects that the outdoor PM2.5 < 300 ug / m 3 , the fresh air main unit switches to a high ventilation rate (450 m 3 / h fresh air volume) for air exchange. At the same time, the air conditioner and the humidifier change the heating capacity and the humidifying amount to improve the indoor air quality without large fluctuations in indoor temperature and humidity.

[0106] If the outdoor haze does not dissipate for a long time, since the fresh air main unit has a low ventilation rate for a long time, it may cause the increase of indoor CO2 / TVOC concentration. When the CO2 concentration > 600 ppm or TVOC > 0.5 mg / m 3 , the fresh air main unit exchanges air at the maximum ventilation rate (600 m 3Run for 0.75 hours with the fresh air volume ( / h), while the air conditioner increases the heating capacity according to (Equation 1), and the humidifier increases the humidification amount according to Equation (2) to balance the temperature and humidity fluctuations caused by the change in fresh air volume. The system adjusts in real time with the changes of various indoor parameters and is always in dynamic balance, which not only meets the indoor comfort requirements but also reduces the system energy consumption.

[0107] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner" and "outer" etc. is based on the orientation or positional relationship in the working state of the present invention. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present invention.

[0108] The present invention has been described above in combination with preferred embodiments, but these embodiments are only exemplary and only serve an illustrative role. On this basis, various substitutions and improvements can be made to the present invention, and these all fall within the protection scope of the present invention.

Claims

1. An indoor air environment control method is implemented by an indoor air environment control system, characterized in that the indoor air environment control system includes a fresh air main unit and a controller. The fresh air main unit exchanges outdoor air with indoor air. An air conditioner and an indoor detector are arranged indoors, and indoor air detection values are obtained through the indoor detector; an outdoor detector is arranged outdoors, and outdoor air detection values are obtained through the outdoor detector; the controller is respectively communicatively connected with the fresh air main unit, the air conditioner, the indoor detector and the outdoor detector; the air detection values include temperature, humidity and PM2.5; the indoor air detection values further include carbon dioxide concentration and TVOC value; a humidifier, a dehumidifier and an air purifier are arranged indoors; this method includes: setting indoor standard air parameters, outdoor abnormal standards and indoor abnormal standards; acquiring indoor air detection values and outdoor air detection values; controlling one or more of the ventilation volume of the fresh air main unit, the cooling / heating capacity of the air conditioner, and the humidifying / dehumidifying capacity of the humidifier / dehumidifier according to the indoor air detection values and outdoor air detection values, so that the indoor air parameters meet the indoor standard air parameters; the indoor standard air parameters represent a comfortable air environment for the human body and include a comfortable temperature and a comfortable humidity; the outdoor abnormal standards include outdoor PM2.5, the indoor abnormal standards include indoor PM2.5, indoor carbon dioxide concentration and indoor TVOC value; this method further includes: acquiring the number of people indoors; controlling the ventilation volume of the fresh air main unit according to the outdoor air detection values, indoor air detection values and the number of people indoors; When the detected outdoor air PM2.5 is higher than the PM2.5 in the outdoor abnormal standard, and the detected value of the indoor air carbon dioxide concentration is lower than the carbon dioxide concentration in the indoor abnormal standard and the detected value of the indoor air TVOC is lower than the TVOC value in the indoor abnormal standard, the ventilation volume of the fresh air main unit is the low ventilation volume Q L , and the low ventilation volume is the ventilation volume Q L is 25n to 35n cubic meters per hour, where n represents the number of people indoors; When the detected outdoor air PM2.5 is lower than the PM2.5 in the outdoor abnormal standard and the detected values of indoor air carbon dioxide concentration and TVOC are respectively lower than the carbon dioxide concentration and TVOC values in the indoor abnormal standard, the ventilation volume of the fresh air main unit is the high ventilation volume Q H , the high ventilation volume Q H is Q H = s * h cubic meters per hour, where s represents the total indoor area and h represents the indoor floor height; When the detected value of the indoor air carbon dioxide concentration is higher than the carbon dioxide concentration in the indoor abnormal standard or the detected value of the indoor air TVOC is higher than the TVOC value in the indoor abnormal standard, the fresh air main unit has the maximum ventilation volume Q F , and the maximum ventilation volume Q F refers to the maximum designed ventilation volume of the fresh air main unit or the maximum ventilation volume that can be achieved when the fresh air main unit outputs air with a PM2.5 not greater than 50 ug / m 3 ³; when the ventilation volume of the fresh air main unit changes or the outdoor air temperature changes, the air conditioner power changes simultaneously to adjust the indoor air temperature in advance; when the ventilation volume of the fresh air main unit changes, the power of the humidifier or dehumidifier changes simultaneously to adjust the indoor air humidity in advance.

2. The indoor air environment control method according to claim 1, characterized in that the indoor detector is placed in the controller, and a people number detection device is further arranged indoors.

3. The indoor air environment control method according to claim 1, characterized in that obtaining the cooling / heating capacity of the air conditioner according to the ventilation volume of the fresh air main unit to stabilize the indoor air temperature.

4. The indoor air environment control method according to claim 1, characterized in that obtaining the humidifying / dehumidifying capacity of the humidifier or dehumidifier according to the ventilation volume of the fresh air main unit to stabilize the indoor air humidity.

5. The indoor air environment control method according to claim 1, characterized in that The cooling / heating capacity of the air conditioner is expressed as ±10% joules per hour: Among them, represents the indoor temperature detection value, represents the comfortable temperature, represents the outdoor temperature detection value, and Q represents the fresh air main unit ventilation volume, represents the detection value of the supply air temperature after the outdoor air passes through the heat recovery of the fresh air main unit; c represents the heat required for a 1-degree change in 1 cubic meter of air, which is a constant; represents the temperature recovery efficiency of the fresh air main unit, obtained according to the factory parameters, s represents the total indoor area, and h represents the indoor floor height.

6. The indoor air environment control method according to claim 1, characterized in that if the PM2.5 detection value in the indoor air detection value is greater than the warning value, the purifier operates at full power; if the indoor PM2.5 detection value is less than the warning value, the purifier operates at low power, and the low power is 30% - 60% of the full power.

Images