JPS59204767A - Measurement of room inmates by co2 concentration - Google Patents

Abstract

PURPOSE:To enable easy calculation of room inmates by suction air quantity into a room, difference of CO2 concentration inside and outside and mean generation quantity of CO2 of pre-determined body. CONSTITUTION:A flowmeter 6 measuring flow of out-of-door air at the lower reach of a fan 5, flowmeter 7 measuring CO2 concentration included in this air in the neighborhood of air inlet port 2 and concentration meter 8 measuring CO2 gas contained in exhaust gas in the neighborhood of exhaust port 4 inside the room 1 are installed respectively. Here, when concentration of CO2 contained in the out-of-door air in the neighborhood of air inlet port 2 is defined as C1, that contained in the exhaust air in the neighborhood of exhaust port 4 is as C2, introduced quantity of the out-of-door air by a fan 5 as Qatm, and further, mean CO2 generating quantity of average body determined experimentally as Qco2, then total number N of room inmates 10 is given roughly by the following equation: N=Qatm(C1-C2)/Qco2, and accordingly, by following the above equation the total N of the room inmates 10 can easily counted.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for measuring the number of people in a room based on carbon dioxide concentration. When air conditioning the atmosphere in a room that accommodates a large number of people, it is desirable to supply an appropriate amount of outside air depending on the number of people in the room. This is especially important when evacuating a large number of people into an isolated and sealed room in the event of a fire or other disaster, as outside air is introduced into the room only through the air conditioner. ,%
When many people are evacuated to various locations due to a large-scale disaster, the number of people in the room is accurately calculated and the right amount of outside air is introduced in order to efficiently utilize the limited capacity of air conditioning equipment. Must. In addition to setting the above-mentioned air conditioning conditions, calculating the number of people in the room is essential as data for taking various measures for the group that has been evacuated.

However, when a large number of people are to be evacuated in an emergency, it is actually difficult to count the number of people entering the room using a counter or the like as in the past, and the number of people in the room cannot be accurately grasped. Furthermore, although we have specifically explained the case of two or more emergencies,9 determining the number of people in the room is an important factor in determining the air conditioning conditions even during normal indoor air conditioning.

In view of the problems of the prior art, an object of the present invention is to provide a device for measuring the number of people in a room based on carbon dioxide concentration as a means for easily calculating the number of people in the room.

Based on the experimental fact that the amount of carbon dioxide gas produced by humans is constant for each individual, the present inventors calculated the amount of carbon dioxide gas produced by the average individual in advance, and compared the amount of outside air introduced indoors with The present invention was completed based on the fact that the approximate number of people in the room can be easily calculated by measuring the concentration of carbon dioxide contained in the exhaust gas discharged into the room and the flow rate of the introduced air.

That is, one aspect of the present invention is a device for measuring the flow rate of outside air introduced into a room, a device for measuring the concentration of carbon dioxide scum contained in the outside air,
a measuring device for measuring the concentration of carbon dioxide contained in the exhaust gas discharged from the room; The apparatus is characterized in that the number of people in the room is calculated based on the average amount of carbon dioxide gas produced by each individual.

An embodiment of the present invention will be described in detail below with reference to the drawings.

In the figure, a blower 5 is provided which takes in outside air from an outside air intake port 2, introduces it into the room 1 through an outlet 3, and discharges it from an exhaust port 4 in order to air-condition the room 1.

In this embodiment, a flow meter 6 that measures the flow rate of outside air introduced downstream of the blower 5 measures the concentration of carbon dioxide contained in the outside air near the outside air intake port 2. A densitometer 7 and a densitometer 8 for measuring the concentration of carbon dioxide contained in the exhaust gas discharged to the outside are provided near the exhaust port 4 in the room 1, respectively.

The measured outputs from the flowmeter 6 and the concentration meters 7 and 8 are input to a calculator 9 that performs calculations to be described later, and the calculation outputs are sent to a drive control unit for the blower 6 etc. via an appropriate control device. It is connected.

In the device of this embodiment like this, the outside air intake port 2
The outside air taken in from the room is introduced into the room from the blower outlet 3 by the blower 5, and is used for breathing by the person in the room, who is typically shown at 10 in the figure, and then is discharged from the exhaust port 4.

Here, the concentration of carbon dioxide gas contained in the outside air near the outside air intake port 2 is C1, the concentration of carbon dioxide gas contained in the exhaust gas near the exhaust port 4 is C2, and the amount of introduced outside air supplied by the blower 5 is Qatm. , and the average individual carbon dioxide generation amount determined experimentally in advance is Qco2, then the approximate total number N of the occupants IO is given by the following formula: Therefore, the outside air introduced as measured by the flow meter 6 gender, densitometer 7,
Carbon dioxide concentration outdoors and indoors measured in step 8.

and f? based on the known average individual carbon dioxide production. iJ
By executing the calculation in the formula, the total number N of persons 10 in the room can be easily calculated.

As described above, in this embodiment, when outside air is introduced into the room by the blower 5, used for the breathing of the occupants, and then exhausted to the outside, a flow meter 6 is used to measure the amount of outside air introduced. By installing concentration meters 7 and 8 that measure the carbon dioxide concentration in the outside air and the carbon dioxide concentration in the exhaust gas, respectively, the number of people in the room 10 can be calculated based on the measuring instruments of these instruments and the constant of The total number N can be calculated quickly and reliably, and the operation of the blower 5 etc. can be controlled based on this number of people in the room to perform appropriate air conditioning. Further, the number of people in the room obtained in this way can be used for air conditioning control as well as various measures that use the number of people in the room as data.

Furthermore, in this embodiment, the calculation of the total number N of the occupants 1o is executed by the calculator 9 based on the calculation formula, and the operation of the blower 5 is controlled by the output of this calculation result. The calculation of the number of people in the room and the associated air conditioning control can be performed completely automatically.

Furthermore, in order to calculate the number of people in the room, a flow meter 6. All you need to do is attach the concentration meters 7 and 8.

Also, when the computing unit 9 is provided, as is clear from the formula,
For example, the device is extremely simple because it only requires a configuration consisting of a multiplier and a coefficient unit.

In the above sections, the case of calculating the number of people in a room has been described, but the present invention is not limited to humans, but can also be applied to calculating the number of livestock and other animals.

Further, for detecting changes in specific components in the outside air and exhaust gas, it may be possible to utilize the fact that in addition to the amount of carbon dioxide gas generated, the amount of oxygen gas consumed is constant for each individual. However, the detection 6
In terms of ease and reliability, the carbon dioxide detection method is more practical.

As described above, according to the present invention, the known number of people in the room can be calculated extremely easily and quickly based on the detection of the carbon dioxide concentration.

[Brief explanation of the drawing]

The drawings are explanatory diagrams schematically showing an embodiment of the present invention. 1... Indoor 5... Blower 6... Flow meter 7, 8... Carbon dioxide concentration meter 9...
Arithmetic unit 10... Person in the room.

Claims (2)

[Claims] (1) A measuring device for the flow rate of outside air introduced into the room. and a device for measuring the concentration of carbon dioxide contained in the outside air. a measuring device for measuring the concentration of carbon dioxide contained in the exhaust gas discharged from the room; 1. A device for measuring the number of people in a room based on carbon dioxide concentration, characterized in that the number of people in the room is calculated based on the average amount of carbon dioxide gas produced by each individual. (2) @ Measurement value QcLtm of the flow rate of outside air introduced into the distribution room by a measuring device, measurement value C1 of the measuring device of the concentration of carbon dioxide contained in the outside air, carbon dioxide contained in the exhaust gas from the room A computing device that calculates the number of occupants N in the room based on the measured value C2 of the concentration measuring device and a predetermined average individual carbon dioxide Jj gas production Qcoz by the following formula; A device for measuring the number of people in a room based on a patented acid gas concentration, further comprising a control device that controls the operation of an air conditioner that introduces outside air into the room based on the calculation output.