JPH0535987B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an indoor air evaluation device that displays the cleanliness or pollution level of indoor air. For more information,
This invention relates to a device that comprehensively evaluates state quantities of multiple factors that affect indoor air pollution, such as carbon dioxide, humidity, dust, etc., and displays this as an indoor air evaluation index.

[Background technology and its problems]

BACKGROUND ART In recent years, indoor air quality has become a problem due to the increase in the density of housing, the occurrence of condensation, mold, dust mites, etc., and the increase in allergic diseases caused by pollen.

In general, the air pollutants are carbon dioxide,
Possible factors include humidity, dust, odor, fungi, and toxic gases, but carbon dioxide, humidity, dust, and odor are considered to be the pollutants of air in general rooms.

Conventionally, devices for measuring the cleanliness or pollution level of indoor air include oxygen concentration meters, hygrometers, dust meters, and the like. However, since these display only oxygen concentration, humidity, dust amount, etc., they can be used as a guide to judge the quality of the state quantities of each factor, but they do not indicate the cleanliness or pollution level of indoor air. cannot be comprehensively displayed.

Therefore, when a resident performs ventilation using these state quantities as a guide, it is extremely troublesome because he or she must check all the meters. Moreover, even if ventilation is performed when the state quantity of any factor exceeds the permissible limit, the degree to which it affects human safety or causes discomfort varies depending on the factor, so it is not uniformly applied. It is not possible to determine the permissible limit according to the situation, and leaving this up to each resident is particularly burdensome for the elderly and children.

[Purpose of the invention]

The purpose of the present invention is to eliminate such conventional drawbacks by comprehensively evaluating the state quantities of multiple factors that affect indoor air pollution, and displaying this as an indoor air evaluation index. To provide an indoor air evaluation device that allows anyone to easily grasp the cleanliness of indoor air.

[Means and actions for solving problems]

The present invention includes a plurality of sensors that respectively detect state quantities of a plurality of factors that influence indoor air pollution, and a calculation means for calculating an indoor air evaluation index based on the state quantities detected by these sensors. , and display means for displaying the evaluation index determined by the calculation means. Here, the term "display means" includes means for visually displaying the evaluation index determined by the calculation means as well as means for expressing it as sound.

The calculation means calculates the difference between the state quantity detected by each sensor and the standard value of each factor as a step number, and multiplies each step number by a weighting coefficient for each factor to obtain the degree of contamination for each factor. , the sum of these contamination degrees is subtracted from the reference value to obtain an indoor air evaluation index, and this is displayed on the display means.

Therefore, from the evaluation index displayed on the display means,
Anyone can easily understand the cleanliness of indoor air.

〔Example〕

An embodiment of the evaluation device according to the present invention will be described below with reference to the drawings. Normally, as mentioned above, carbon dioxide, humidity, dust, and odor are considered to be the pollutants of air in a general room, but since the increase in carbon dioxide is approximately proportional to the decrease in oxygen, measurement of the amount of oxygen can be used as a substitute. Furthermore, since the main sources of odor in a general room are human bodies or cigarettes, they can be replaced by carbon dioxide and dust. In this embodiment, an evaluation index for indoor air is determined based on three factors, oxygen, humidity, dust, cigarette smoke, and dust caused by other smoke, among a plurality of factors that affect indoor air pollution.

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. Incidentally, since cigarette smoke accounts for a large proportion of dust in a general room, it is preferable that the dust sensor 1C be capable of sensing this, and 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 unit 2 at a predetermined timing.

The arithmetic device 2 includes a memory (not shown) for storing constants, various numerical values, etc. given from the input device 3, and executes the processing shown in FIG. 3 according to a preset procedure. First, the difference between each data detected by each sensor 1A to 1C and the standard value of each factor, here 21% oxygen, 50% humidity, and 0 mg/ ^m3 of dust, is determined as a step number, and this is displayed on the display device 4. indicate. Next, the number of steps of each data is multiplied by the weighting coefficient of each factor to obtain the degree of contamination for each factor, and the sum of the degrees of contamination is subtracted from the reference value to obtain the evaluation index, which is displayed on the display device 4. do. Finally, it is determined whether the evaluation index is below the reference point or not, and if it is not below the reference point, the process returns to the beginning. On the other hand, if the evaluation index is below the reference point, after outputting an alarm signal, it is determined in order whether each data is outside the allowable limit of each factor, and if it is outside the allowable limit, the corresponding signal, In other words, a ventilation command signal, a humidity improvement command signal, and a purification command signal are output for a certain period of time.

The display device 4 includes an oxygen data display 5 that displays oxygen data, a humidity data display 6 that displays humidity data, and a dust data display 7 that displays dust data, as well as an evaluation index that digitally displays an evaluation index. A display 8 is provided. Note that the evaluation index display 8 can display the air cleanliness as an index from 1 to 10. For example, an index of 9 to 10 means "comfortable", 8 means "suitable", 7 means "slightly poor", 6 means "poor", and 5 or less means "unsuitable".

The oxygen data display 5, as shown in FIG. 2A,
10 light emitting diodes D ₁ to _{D 10} are arranged in a row, and the oxygen concentration is 0.15% or more and 19.65% or more.
Each percentage can be displayed in 10 steps. In other words, when the oxygen concentration is above 21%, only diode _D1 lights up,
Diodes D ₂ to _{D 10} light up in order every time the oxygen concentration decreases by 0.15% with respect to 21%. At this time, the diodes D ₁ to _{D 3} are colored green, the diodes D ₄ to D ₇ are colored yellow, and the diodes D ₆ to _{D 10} are colored red, so you can tell which color area the lit diode belongs to. This can be used as a guideline for evaluation.

The humidity data display 6, as shown in FIG. 2B,
10 light emitting diodes D ₁ to D ₁₀ are arranged in a line and can display the humidity range from 10% or less to 90% or more in 10 steps in 10% increments. That is, humidity 50
%, diodes D ₅ and D ₆ light up and the humidity is 50%
For every 10% increase based on the diode D ₇ ~
Each time _D10 decreases by 10%, diodes _D4 to _D1 light up in sequence. In this case, diodes D ₅ , D ₆
The diodes D ₃ , D ₄ , D ₇ , D ₈ are colored yellow, and the diodes D ₁ , D ₂ , D ₉ , D ₁₀ are colored red. This color coding provides a guideline for evaluation. It can be done.

The dust data display 7, as shown in FIG. 2C,
10 light emitting diodes D ₁ to _{D 10} are arranged in a line and can display the dust amount in the range of 0.05 mg/m ³ or less to 0.45 mg/m ³ or more in 10 steps in 0.05 mg/m ³ increments. In other words,
When the amount of dust is 0.05 mg/m ³ or less, only diode D ₁ lights up, and every time the amount of dust increases by 0.05 mg/m ³ from 0 mg/m ³ , diodes D ₂ to _{D 10} light up in order. Note that the color coding of the diodes _D1 to _D10 is the same as that of the humidity data display 5.

Next, the operation of this embodiment will be explained.

In the calculation device 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 calculate the number of steps S. Find _x and display oxygen according to this step number S _x . In other words, the number of oxygen data displays 5 is equal to the number of steps S _x .
diodes D ₂ to D ₁₀ are turned on in sequence. Therefore, the diode D ₁ ~ which lights up depending on the oxygen concentration
Since the number of _D10 increases or decreases, the oxygen status can be confirmed by its length.

Next, read the humidity data Y detected by the humidity sensor 1B, and combine that humidity data Y with the standard value (50
%) is divided by the preset step width (10%) to obtain the number of steps S _Y , and the humidity is displayed according to this number of steps. In other words, if the step number S _Y is +, the number of diodes equal to the step number S _Y is
If the step number S _{Y is negative} , the diodes D ₄ to _{D 1} are sequentially turned on by the number of steps S _Y. Therefore, if the humidity is high relative to 50%, the diodes D ₇ to D ₁₀ will be used, and if the humidity is low, the diodes
Since D ₄ to _{D 1} are lit, the humidity state can be confirmed by the lighting direction and number of diodes D ₁ to _{D 10} .

Next, read the dust data Z detected by the dust sensor 1C, and combine that dust data Z with the standard value (0
mg/m ³ ) is divided by the step width (0.05 mg/m ³ ) to find the step number S _Z , and the dust is displayed according to this step number S _Z. That is, the diodes D ₂ to _{D 10} of the dust data display 7 are turned on by the number of steps S _Z. Therefore, the number of diodes D ₁ to _{D 10} that light up increases or decreases depending on the amount of dust, so the state of the dust can be confirmed based on their length.

Next, an indoor air evaluation index is determined. This includes the number of steps _S
The contamination degree for each factor is determined by multiplying S _Y and S _Z by the weighting coefficients A, B, and C for each factor, and the sum of these contamination degrees is subtracted from the reference value 10 to determine the evaluation index.
In other words, evaluation index = 10−(AS _X + | BS _Y | + CS _Z ). However, A: 1.5, B: 2, and C: 1.
After that, the obtained evaluation index is displayed on the evaluation index display 8.
displayed digitally. Therefore, the evaluation index display 8
You can understand the cleanliness of the indoor air from the numerical value displayed.

Next, it is determined whether the evaluation index is below the reference point 6 or not. If the evaluation index is not below the reference point, the process returns to the oxygen data reading process. On the other hand, if the evaluation index is below the reference point, after outputting an alarm signal, check whether the oxygen data is the allowable limit range (40%~50%)
and whether the dust data Z is above the permissible limit (for example, 0.15 mg/m ³ stipulated by the Building Standards Act), and if any of the dust data is outside the permissible limit. In this case, a corresponding signal, that is, a ventilation command signal, a humidity improvement command signal, and a purification command signal, is output for a certain period of time. Therefore, in the absence of air purification equipment, alarm signals can be used to prompt residents to ventilate, while in the presence of air purification equipment, these command signals can be used to open ventilation doors, improve humidity, etc. Air conditions can be automatically improved by operating equipment (dehumidifiers and humidifiers), air purifiers, etc.

According to this embodiment, the oxygen, humidity, and dust amount in indoor air are detected, and these state quantities are comprehensively evaluated to obtain an evaluation index, which is displayed. The cleanliness or contamination level can be comprehensively understood. Therefore, when performing ventilation, there is no need to check various instruments as in the past, so there is no hassle. This can ensure the comfort, health, and safety of residents, and can also be easily linked to air conditioning systems.

Furthermore, since the evaluation index is displayed as an index from 1 to 10, anyone can easily understand and handle it, and even the elderly and children can use it. At the same time, oxygen, humidity, and dust amount are also indexed and displayed, so you can prevent condensation.
It can be used to maintain and manage housing.

In addition, in the above example, oxygen, humidity, and dust
Although the indoor air evaluation index is calculated based on factors, air quality can be evaluated more accurately if the evaluation index is calculated by including other factors such as fungi and toxic gases.

In addition, in the above example, when calculating the number of steps for each data, the step width for oxygen was set to 0.15.
%, the step width for humidity was 10%, and the step width for dust was 0.05 mmg/m ³ , but these step widths may be arbitrarily determined. However, if it is too small, the display range will be narrow due to the relationship with indicators 5, 6, and 7, and if it is too large, it will not be possible to display slight fluctuations in each data, so consider these points when deciding. It is preferable to do so.

In addition, when displaying each data based on the number of steps, in the above example, each data is displayed in 10 steps, but this can also be done arbitrarily as long as the required state quantity can be displayed within a certain range. In addition, the expression may be expressed not only visually but also by sound.

In addition, when calculating the evaluation index from the number of steps of each data, the weight diameter coefficient of each data is not limited to the value in the above example, but also the degree to which each factor affects human safety and It may be determined as appropriate, taking into consideration the discomfort caused. Furthermore, the display of the evaluation index is not limited to 10 levels as in the above embodiment, but may be arbitrary, and may be expressed not only visually but also by sound.

〔Effect of the invention〕

As described above, according to the present invention, the state quantities of multiple types of factors that affect indoor air pollution are comprehensively evaluated, and this is displayed as an indoor air evaluation index, so anyone can easily It is possible to provide an indoor air evaluation device that can determine the cleanliness of indoor air.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention; FIG. 1 is a block diagram of the entire device, FIG. 2 is a diagram showing each data display, and FIG. 3 is a flowchart. 1A to 1C...Sensor, 2...Control device, 3...Input device, 4...Display device.

Claims (1)

[Claims] 1. A plurality of sensors that respectively detect state quantities of a plurality of factors that influence indoor air pollution, and a difference between the state quantity detected by each of these sensors and the standard value of each factor. Find each as the number of steps,
A calculation means for multiplying each step number by a weighting coefficient for each factor to obtain a contamination degree for each factor, and subtracting the sum of these contamination degrees from a reference value to obtain an indoor air evaluation index; An indoor air evaluation device comprising: a display means for displaying the obtained evaluation index; 2. The indoor air evaluation device according to claim 1, wherein the plurality of sensors include an oxygen sensor, a humidity sensor, and a dust sensor. 3. An indoor air evaluation device according to claim 1 or 2, characterized in that the reference value is 10.