JPH0756405B2 - Indoor air cleaning method - Google Patents

Description

The present invention relates to a method for cleaning indoor air. For more information,
The present invention relates to a cleaning method for improving state quantities of a plurality of factors that affect indoor air pollution in accordance with preset priorities.

[Background technology and its problems]

Recently, with the increase in airtightness of houses, the occurrence of dew condensation, mold, mites, etc., and allergic diseases caused by pollen, etc. are increasing. Therefore, the quality of indoor air has become a problem.

Generally, air pollution factors include carbon dioxide, humidity, dust, odor, fungi, and toxic gas, but air pollution factors in a general room include carbon dioxide, humidity, dust, and odor.

Conventionally, when configuring a system for cleaning indoor air, an instrument that detects the state quantity of a factor that affects the pollution of indoor air, such as an oxygen concentration meter, a hygrometer, a dust meter, etc., is installed in the room, It is conceivable to drive various purifying devices in conjunction with these. For example, the ventilator is activated when the value of the oximeter falls below the allowable limit. Also,
The dehumidifier is driven when the value of the hygrometer becomes higher than the allowable upper limit value, while the humidifier is driven when the value of the hygrometer becomes lower than the allowable lower limit value. Further, the air purifier is driven when the value of the dust meter becomes higher than the allowable limit.

In such a system, if the state quantities of all factors deviate from the permissible limits, all devices will be driven simultaneously and excessive power will be temporarily consumed. Equipment is required. However,
If you try to drive them in order, some factors may impair the safety of the human body or cause human discomfort.
In some cases, the safety of people cannot be guaranteed.

[Object of the Invention]

An object of the present invention is to provide a method for cleaning indoor air that eliminates the above-mentioned conventional drawbacks and ensures the safety of people living while economically cleaning indoor air.

[Means and Actions for Solving Problems]

In the present invention, in consideration of the degree of affecting the safety of the human body and the degree of causing discomfort to a person, the priority of factors affecting the indoor air pollution is determined, and the state quantity of each factor is determined according to this priority. The above-mentioned object is to be achieved by improving the above so as to satisfy the allowable limit.

Specifically, in a method for cleaning indoor air, which improves at least oxygen, dust, and humidity state quantities among a plurality of factors that affect pollution of indoor air by a cleaning device including at least a ventilation device, Oxygen, dust, and humidity are priorities, and according to this priority, the state quantity of the factor is detected, and it is judged whether or not the state quantity of this factor is within the preset allowable limit for that factor. When the state quantity is not within the allowable limit, a purifying device for improving it is driven, and the state quantity of the next factor is improved on condition that the state quantity of the factor is within the allowable limit.

〔Example〕

An embodiment of a cleaning system to which the method of the present invention is applied will be described below with reference to the drawings. Usually, carbon pollutants, humidity, dust, and odor are considered as the air pollutants in the general room as described above, but since the increase of carbon dioxide is approximately proportional to the decrease of oxygen, it can be substituted for the measurement of oxygen amount. Further, since the source of odor in the general room is mainly due to the human body or cigarette, it can be replaced by the amount of carbon dioxide and dust. In the present embodiment, the purifying device is driven on the basis of three factors, which are dust, such as oxygen, humidity, dust, cigarettes, and other smoke, among a plurality of factors that affect pollution of indoor air.

FIG. 1 shows an overall block diagram of this embodiment. In the figure, 1A is an oxygen sensor, 1B is a humidity sensor, and 1C is a dust sensor. Since the smoke of cigarettes has a large specific gravity in the dust in the general room, it is preferable that the dust sensor 1C can detect it, for example, a miscellaneous gas sensor or a CO sensor can be used. The state quantity data of each factor detected by each of these sensors 1A to 1C is sequentially read into the arithmetic and control unit 2 at a predetermined timing.

The arithmetic and control unit 2 is provided with a memory (not shown) for storing constants and various numerical values given from the input unit 3, and as shown in the flowchart of FIG. 3, the state of each factor according to a preset priority order. Purification device 11, in this case ventilation device 12, dehumidifier 13, humidifier so that the amount is within the allowable limit
The state quantity of the next factor is improved on condition that the state quantity of the factor is within the allowable limit by selectively driving 14 and the air purifier 15. The order of priority here is oxygen, dust, and humidity.

First, the difference between the oxygen data X detected by the oxygen sensor 1A and the standard value of oxygen, here 21% oxygen is obtained as the step number S _X , and this is displayed on the display device 4, and then the oxygen data X is displayed.
Is an allowable limit (for example, 20.5
%) Or more. If it is less than the allowable limit, the ventilation command signal is output to the ventilation device 12. On the other hand, in the case of the allowable limit or more, after stopping the ventilation command signal, the process proceeds to the next process.

Next, the difference between the dust data Z detected by the dust sensor 1C and the standard value of the dust, here the dust 0 mg / m ³ is calculated as the step number S _Z , and this is displayed on the display device 4, and then the dust data is displayed. Z is a permissible limit (for example, as defined by the Building Standards Law)
0.15mg / m ³ ) It is judged whether it is below. If it is higher than the allowable limit, it is judged whether or not a predetermined time has passed after outputting the purification command signal to the air purifier 15, and if it is not elapsed, the dust data Z is read as it is. Is stopped and the ventilation command signal is output to the ventilation device 12, and then the process returns to the process of reading the dust data Z. On the other hand, in the case of the allowable limit or less, the purification command signal or the ventilation command signal is stopped, and then the process proceeds to the next process.

Next, the difference between the humidity data Y detected by the humidity sensor 1B and the standard value of the humidity, here 50% humidity, is obtained as the number of steps S _Y and displayed on the display device 4, and then the humidity data Y
Is within the allowable limit (for example, 40% or more and 60% or less). If it is not within the allowable limit, it is then determined whether or not the humidity data Y is higher than the allowable upper limit value (60%), and if it is higher, the dehumidifying command signal is sent to the dehumidifier 13, and if it is lower, the lower limit value (40%). ) Is less than) humidifier command signal humidifier
After outputting to 14 respectively, it returns to the reading process of the humidity data Y. On the other hand, if it is within the allowable limit, after the dehumidifying command signal or the humidifying command signal is stopped, the process returns to the first reading process of the oxygen data X.

The display device 4 is provided with an oxygen data display 5 for displaying oxygen data, a humidity data display 6 for displaying humidity data, and a dust data display 7 for displaying dust data.

As shown in FIG. 2 (A), the oxygen data indicator 5 has ten light-emitting diodes D _{1 to} D ₁₀ arranged in a line, and an oxygen concentration of 21% or more to 19.65% or less is measured every 0.15%. It can be displayed in stages. That is, when the oxygen concentration is 21% or more, only the diode D ₁ is turned on, and the oxygen concentration is 0.
Each time the voltage drops by 15%, the diodes D _{2 to} D ₁₀ are sequentially turned on.
At this time, the diodes D _{1 to} D ₃ are green and the diodes D _{4 to} D ₇ are green.
The yellow diode D ₈ to D ₁₀ is because it is colored respectively red, can be diode during lighting is a measure of evaluation by it belongs to what color region.

As shown in FIG. 2 (B), the humidity data indicator 6 has ten light emitting diodes D _{1 to} D ₁₀ arranged in a line, and a range of humidity 10% or less to 90% or more for every 10%. It can be displayed in 10 levels. That is, when the humidity is 50%, the diodes D ₅ and D ₆
Lights up, and each time the humidity rises 10% with 50% as the reference, the diodes D _{7 to} D ₁₀ turn on and the diodes D ₄ to D ₁₀ turn on every 10% decrease.
₁ lights in order. In this case, the diodes D ₅ , D ₆ are green, the diodes D ₃ , D ₄ , D ₇ , D ₈ are yellow, and the diodes D ₁ , D ₆ ,
Since D ₂ , D ₉ , and D ₁₀ are color-coded in red, respectively, this color-coding can be used as a reference for evaluation.

Dust data display 7, as shown in FIG. 2 (C), the 10 light emitting diodes D ₁ to D ₁₀ in which are arranged in a row, the dust amount 0.05 mg / m ³ or less ~0.45mg / m ³ or more Range of 0.05 mg / m ³
10 steps can be displayed for each. This means that only the diode D ₁ in the following quantity of dust 0.05 mg / m ³ is turned, the amount of dust 0.05 mg / m ³ diode D ₂ to D ₁₀ each increase is turned in order based on the 0 mg / m ^3. The colors of the diodes D _{1 to} D ₁₀ are the same as those of the humidity data indicator 5.

Next, the operation of this embodiment will be described.

In the arithmetic and control unit 2, first, the oxygen data X detected by the oxygen sensor 1A is read, and the difference between the oxygen data X and the standard value (21%) is divided by a preset step width (0.15%) to determine the number of steps. S _X is obtained, and oxygen is displayed according to the number of steps S _X. That is, the diodes D _{2 to} D ₁₀ of the oxygen data indicator 5 are sequentially turned on for the number of steps S _X. Therefore, the diode D _{1 that} lights depending on the oxygen concentration
As the number of D ₁₀ is increased or decreased, the oxygen status can be confirmed by the length.

After that, it is determined whether the oxygen data X is equal to or more than the allowable limit (20.5%). If it is less than the allowable limit, a ventilation command signal is output to the ventilation device 12 to drive it, and then the process returns to the process of reading the oxygen data X again, and this closed loop process is repeated. At this time, when the ventilation device 12 is driven, the oxygen data X is improved, and at the same time, if the outside air is normal,
Since the dust and the humidity are also improved, the subsequent control of the dust and the humidity can be effectively performed.

Eventually, when the oxygen data X exceeds the permissible limit due to the driving of the ventilation device 12, the ventilation command signal is stopped and the process proceeds to the next process.

Next, read the dust data Z detected by the dust sensor 1C and divide the difference between the dust data Z and the standard value (0 mg / m ³ ) by the step width (0.05 mg / m ³ ) to obtain the step number S _Z. Seeking,
Dust is displayed according to the number of steps S _Z. That is, the number of diodes of the dust data display 7 is equal to the number of steps S _Z.
Turn on D _{2 to} D ₁₀ . Accordingly, the number of diodes D ₁ to D ₁₀ to be turned by the dust amount is increased or decreased, it is possible to check the dust state by its length.

After that, it is determined whether the dust data Z is below the allowable limit (0.15%). If it is higher than the allowable limit, after outputting a purification command signal to the air purifier 15 and driving it,
It is determined whether a predetermined time has passed. If the predetermined time has not passed yet, the process returns to the process of reading the dust data Z, but if the time has passed, the purification command signal is stopped and the ventilation command signal is output to the ventilation device 12, and then the process returns to the process of reading the dust data Z, and this closed loop The process of is repeated. Therefore, the dust data Z can be obtained before the predetermined time elapses after the air cleaner 15 is driven.
If does not fall below the allowable limit, the ventilation device 12 is driven instead of the air purifier 15, so that the ventilation device 12 improves the state quantity of the dust data Z.

Eventually, when the dust data Z falls below the allowable limit due to the driving of the air purifier 15 or the ventilation device 12, the purification command signal or the ventilation command signal is stopped, and then the process proceeds to the next process.

Next, the humidity data Y detected by the humidity sensor 1B is read, and the difference between the humidity data Y and the standard value (50%) is divided by a preset step width (10%) to obtain the number of steps S _Y , Humidity is displayed according to the number of steps S _Y. That is, if the step number S _Y is +, the step number S _Y
Only diodes D ₇ to D ₁₀ number, step number S _Y is - if, as many diode D ₄ to D ₁ of the step number S _Y
Light up in order. Therefore, when the humidity is high with 50% as the reference, the diodes D _{7 to} D ₁₀ are low and the diodes D _{4 to} D ₁ are lit, so that the humidity condition can be confirmed by the lighting direction and the number of the diodes D _{1 to} D _10. it can.

After this, the humidity data Y is within the allowable range (40% to 60%)
It is determined whether it is within. If it is not within the allowable range,
Then, it is determined whether or not the allowable upper limit value is exceeded. If the allowable upper limit value (60%) is exceeded, the humidity data Y is output after the dehumidification command signal is output to the dehumidifier 13 and driven.
Return to the reading process of. On the other hand, when the allowable upper limit value is not exceeded, that is, when the allowable lower limit value (40%) is not exceeded, after outputting the humidification command signal to the humidifier 14 and driving it,
The process returns to the process of reading the humidity data Y, and this closed loop process is repeated.

Eventually, when the humidity data Y falls within the allowable range by driving the dehumidifier 13 or the humidifier 14, the dehumidifying command signal or the humidifying command signal is stopped, and then the process returns to the first process.

In this way, the state quantities of the respective factors are sequentially controlled according to the preset priority order so as to satisfy the allowable limit.

According to the present embodiment, the order of priority is oxygen, dust, and humidity, and according to this priority, the state quantities of each factor are improved so as to meet the allowable limit, so that the safety of the human body can be guaranteed, and Less discomfort to. Moreover, since all the devices 11 are not driven simultaneously, electrical equipment can be economically provided.

Also, if the ventilation device 12 is driven by the decrease in the amount of oxygen,
Dust and humidity are also improved accordingly, which is more effective. That is, it is not necessary to drive the air purifier 15 for improving the amount of dust and the dehumidifier 13 or the humidifier 14 for improving humidity, or the driving time can be shortened.

Further, in improving the dust data, first, the air purifier 15 is driven, and if the dust data does not fall below the allowable limit before a predetermined time has passed from the driving, the ventilation device 12 is used instead of the air purifier 15. Since it is driven, the dust data can be effectively improved.

Further, since oxygen, humidity and dust amount are also indexed and independently displayed, the states thereof can be grasped at a glance, and it can be useful for measures against dew condensation, maintenance and management of houses.

In the above embodiment, the ventilation device 12 as the purification device 11,
Although the dehumidifier 13, the humidifier 14, and the air purifier 15 have been described, basically, ventilation can improve the oxygen amount, the humidity, and the dust amount. In this case, if the oxygen, dust, and humidity exceed the permissible limits, the ventilation device 12 will always be driven, but the dust and humidity may not be improved by driving the ventilation device 12 depending on the state of the outside air. Therefore, for dust and humidity, it is judged whether or not those state quantities have been improved after a certain time has passed since the ventilation device 12 was driven, and if it is improved, the drive of the ventilation device 12 is continued. On the other hand, if not improved, the ventilation device 12 may be stopped, and the ventilation device 12 may be driven again after a predetermined time has elapsed.

Further, in the above example, in obtaining the number of steps of each data, the oxygen step width is 0.15%, the humidity step width is 10%, the dust step width is 0.05 mg / m ³ ,
These step widths may be arbitrarily determined. However, if it is too small, the display range will be narrowed due to the relationship with the display units 5, 6 and 7. On the contrary, if it is too large, it will not be possible to display slight fluctuations in each data. Preferably.

Further, in displaying each data based on the number of these steps, in the above-mentioned embodiment, each is displayed in 10 steps, but it may be arbitrary as long as it can display the state quantity in a certain range required for this, as well. Not limited to visual, it may be expressed by sound.

Further, in the above embodiment, the allowable limit of oxygen is 20.5% or more,
Dust tolerance limit of 0.15 mg / m ³ or less, humidity tolerance limit of 40
Although the allowable limit is not limited to this value, it can be determined in consideration of the degree to which the safety of the human body is affected and the degree to which the person feels uncomfortable. preferable.

〔The invention's effect〕

As described above, according to the present invention, it is possible to provide a method for cleaning indoor air, which can economically clean indoor air while ensuring the safety of the resident. Regarding the present invention,
IPC is "24F11 / 00, B01D46 / 42", keyword is "oxygen,
When a so-called Patrice search was performed for "humidity and dust," no "indoor air cleaning method" such as the present invention was found, and the reinvention of the present invention in the relevant field was clarified.

[Brief description of drawings]

FIG. 1 shows an embodiment to which the method of the present invention is applied. FIG. 1 is a block diagram of the entire apparatus, FIG. 2 is a view showing each data display, and FIGS. 3 (A) (B) (C). ) Is a flowchart. 1A to 1C ... Sensor, 2 ... Arithmetic control device, 3 ... Input device, 4 ... Display device, 11 ... Purification device, 12 ... Ventilation device, 13 ... Dehumidifier, 14 ... Humidifier, 15 ... Air purifier.

Claims (1)

[Claims] 1. A method of purifying indoor air, which improves at least oxygen, dust, and humidity state quantities among a plurality of factors that affect pollution of indoor air by a purifying device including at least a ventilation device. Oxygen, dust, and humidity are priorities, and according to this priority, the state quantity of the factor is detected, and it is judged whether or not the state quantity of this factor is within the preset allowable limit for that factor. A room characterized by driving a purifying device to improve the state quantity when it is not within the allowable limit, and improving the state quantity of the next factor on condition that the state quantity of the factor is within the allowable limit. How to clean the air