JP2859052B2 - Environmental condition monitoring device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an environmental condition monitoring apparatus for monitoring the occurrence of a fire or an environmental abnormality in a monitoring space.

[0002]

2. Description of the Related Art Conventionally, for example, Japanese Patent Application Laid-Open No. Sho 62-203300
There is known a fire detection device such as that disclosed in U.S. Pat. This fire detection device is configured to suck air containing smoke and the like in a caution area by a sampling pipe, and detect a fire by a fire detection unit based on the sucked air. The fire detection unit is of an ionization type that detects a decrease in ionization current due to smoke combustion products, or a photoelectric type (smoke detection type) that detects scattered light scattered by smoke particles. Etc. can be used.

[0003]

By the way, it is known to those skilled in the art, based on the air containing smoke or the like, whether this is due to the occurrence of a fire or the contamination of the environment, that is, the environmental abnormality. There is a demand for a device that can determine the difference between the two. However, in the conventional apparatus, these cannot be distinguished, and there is a problem that even though the environment is merely a dirt, it is determined that a fire has occurred and a false report is generated. .

According to the present invention, the occurrence of a fire can be distinguished from the environmental abnormality based on air containing smoke and the like, the frequency of false alarms and the like can be reduced, and when the environment is dirty, It is an object of the present invention to provide an environmental condition monitoring device capable of determining this as an environmental abnormality.

[0005]

In order to achieve the above object, according to the first aspect of the present invention, a number calculating means for calculating the number of particles contained in a monitoring space for each particle size, and the number calculating means. Based on the obtained number value for each particle size , comprising a state determination means for determining the state of the monitoring space , the state determination means, the number calculation means
A predetermined particle size range among the calculated values for each particle size
The number value NC of the particles contained in
And a second judgment level larger than the first judgment level
And the numerical value NC of the particles included in the predetermined particle size range
Is higher than the first judgment level but is higher than the second judgment level.
Is smaller, it is judged that the environment of the monitoring space is abnormal.
Further, the number value NC of the particles included in the predetermined particle size range is
When it is higher than the first judgment level and the second judgment level
Is obtained by the state determination means by the number calculation means.
Of the predetermined particle size range,
The number value NB of particles having a particle size larger than the upper limit particle size of
3 and the upper limit of the predetermined particle size range.
The number value NB of particles having a particle size larger than the particle size is the third judgment.
Above the level, a fire
While it is determined that occurrence has occurred, the particle size at the upper limit of the predetermined particle size range
The number value NB of particles having a larger particle size than the third determination level
Smaller than the specified particle size range.
From the number value NC of the particles and the upper limit particle size of the predetermined particle size range.
The ratio NC / NB with the number value NB of particles having a large particle size is also determined.
Therefore, when the ratio NC / NB is larger than the predetermined value K,
Judging that the environment of the monitoring space is abnormal, the ratio NC / NB
If it is smaller than the fixed value K, it is judged that there is a possibility of fire.
It is characterized by being adapted to cross. As a result, the occurrence of a fire and the abnormality in the environment can be distinguished and detected, the frequency of occurrence of false alarms and the like can be reduced, and when the environment is dirty, it can be determined as an environmental abnormality.

[0006]

According to a second aspect of the present invention, when an environmental abnormality or a fire is detected in a monitored space, the environmental abnormality is divided into an environment display portion, and the occurrence of a fire is divided into a fire display portion. It is characterized in that it is displayed. Thereby, when monitoring the status at a plurality of different places, when it is determined that the environment is abnormal at a certain place and a fire has occurred at another place, each alarm display can be displayed separately. Can be aware of multiple types of alerts at multiple different locations.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a configuration diagram of an embodiment of an environmental condition monitoring apparatus according to the present invention. In the following, for convenience, the environmental condition monitoring device will be used in a clean air environment of a clean room, and will be described as monitoring the condition in the clean air environment. Referring to FIG. 1, the environmental condition monitoring device includes a suction type particle detection device D that suctions air in a clean room, which is a monitoring space, and detects particles contained in the sucked air by particle size, A relay device E for counting the number of fine particles detected by the particle size for each predetermined time period for each particle size in the fine particle detection device D;
And a central monitoring device 1 for determining the state of the monitoring space based on the counted value for each particle size counted in.

FIG. 2 is a diagram showing an example of the configuration of a suction type particle detecting device D. The suction-type particle detecting device D includes a pipe 5 provided with a communication hole 4 in a monitoring space, that is, a portion extending into the clean room 3 and communicating with the inside of the clean room 3, and the air in the clean room 3 through the pipe 5. A suction device 6 such as a suction fan for suctioning the air in the clean room 3 by the suction device 6, and a high sensitivity for detecting particles of a predetermined size contained in the air passing through the tube 5 with high sensitivity. And a sensitive fine particle detector 7.

FIG. 3 is a circuit diagram of the high-sensitivity particle detector 7 shown in FIG. Referring to FIG. 3, the fine particle detector 7 includes a light emitting circuit 10 for emitting light necessary for light scattering by particles, a light receiving circuit 11 for receiving scattered light and performing photoelectric conversion, and a light receiving circuit 11 A filter circuit 12 for removing a noise component from a signal from the amplifier, an amplifying circuit 13 for amplifying a signal that has passed through the filter circuit 12, and comparing the amplified signal strength with predetermined threshold values TH ₁ and TH ₂ to amplify the signal. signal strength, that is, when the scattered light intensity is TH ₁ or more, this is a first comparator circuit for detecting the particles of the particle size as is due to particles having a particle size of at least 0.3 [mu] m 14
When the amplified signal is compared with a predetermined threshold value TH _2, the amplified signal strength, that is, when the scattered light intensity is TH ₂ or more, the particle size as it is due to particles having a particle size of at least 1μm Second comparison circuit 15 for detecting particles of
And

Referring again to FIG. 1, the relay device E
Is a central processing unit (CPU) 21 for performing overall control;
A storage unit 22 for storing programs and data necessary for processing of the central processing unit 21 and an address required for polling from the central processing unit 21, and a first comparison circuit 14 of the suction-type particle detection device D. A first counting unit 23 for counting detection pulses of particles having a particle diameter of 0.3 μm or more within a certain sampling time;
Functions as an interface between the second counting unit 24 for counting detection pulses of particles having a particle size of μm or more within a certain sampling time, and the first and second counting units 23 and 24 and the central processing unit 21. An interface unit 25 that performs
A transmission circuit 26 for transmitting the counting results of the first and second counting units 23 and 24 to the central monitoring device 1 via the transmission line L, and an interface between the transmission circuit 26 and the central processing unit 21 Interface section 27
And

FIG. 4 is a diagram showing an example of the configuration of the central monitoring device 1. Referring to FIG. 4, the central monitoring device 1 includes a central processing unit 31 that controls the whole, and a storage unit 32 that stores programs and data necessary for processing of the central processing unit 31.
A transmission circuit 33 for performing data transmission and the like via the transmission line L between the transmission circuit 26 and the transmission circuit 26 of the relay device E;
, An operation unit 35, an output unit (for example, a display unit) 36 for outputting monitoring results and the like, an operation unit 35, an output unit 36, and a central processing unit. And an interface unit 37 functioning as an interface with the unit 31.

Here, the central processing unit 31 determines a fire and an environmental abnormality based on the detection result of the number of particles for each particle size sent from the relay device E.
More specifically, the difference between the detection result of the number of particles having a particle diameter of 0.3 μm or more and the detection result of the number of particles having a particle diameter of 1 μm or more is determined to be 0.1 μm.
The number of particles having a small particle size of 3 μm to 1 μm is obtained, and based on this, an environmental abnormality in the monitoring space is determined.
The occurrence of a fire is determined based on the detection result of the number of particles having a larger particle diameter. 0.3 μm
A very early fire or an abnormal environment is determined based on the ratio of the number of particles having a small particle size of 1 μm to the number of particles having a large particle size of 1 μm or more. In addition, each of the above determination results is displayed on an output unit (for example, a display unit) 36 as an alarm.

Next, the processing operation of the environmental state monitoring apparatus having such a configuration will be described. In a clean room, for example, when an electric wire coating burns while smoldering, particles of the combustion products move at a high speed, for example, to a return section of an air conditioner while being diluted by a large amount of clean air. In this embodiment, air can be sucked from the return portion by the suction device 6 and the fine particles in the air can be detected with high sensitivity by the fine particle detector 7. That is, the particle detector 7
In the method, a particle of a predetermined size (particles such as smoke) contained in the air is detected with high sensitivity by a pulse, and this detected pulse can be given to the relay device E.

At this time, in the first comparison circuit 14,
Particles having a particle size of 0.3 μm or more are detected as a pulse P ₁ , and the second comparison circuit 15 detects particles having a particle size of 1.0 μm or more as a pulse P ₂ .

The above-described particle detection by particle diameter focuses on the fact that the larger the particle diameter of the particle, the higher the scattered light intensity. FIGS. 5A, 5B, and 5C are diagrams illustrating an example of a signal from the amplifier circuit 13 of the particle detector 7, that is, an example of the scattered light intensity detected by the particle detector 7. FIG. 5 (a), 5 (b) and 5 (c), the threshold value TH
₁ represents a threshold value of the scattered light intensity due to the particles having a particle diameter of 0.3 μm. When a scattered light intensity of the threshold value TH ₁ or more is obtained, it is assumed that particles having a particle diameter of 0.3 μm or more exist. Can be detected. In addition, the threshold value TH ₂ is,
Represents a threshold value of the scattered light intensity due to particles having a particle size of 1.0 μm, and when a scattered light intensity of not less than the threshold value TH ₂ is obtained,
This can be detected as the presence of particles having a particle size of 1.0 or more. FIGS. 5 (a) is a detected scattered light intensity threshold value TH ₁ or more shows a case is smaller than the threshold value TH _2, in this case, the first comparator circuit 1
At 4, the pulse is detected as particles having a particle diameter of 0.3 μm or more, and the pulse P ₁ is output from the first comparison circuit 14. At this time, in the second comparison circuit 15,
Since the detected scattered light intensity is smaller than the threshold value TH _2,
Pulse _{P 2} is not output. On the other hand, FIG. 5 (b), the detected scattered light intensity shows the case of the threshold value TH ₂ or more, in this case, the second comparator circuit 15, 1.
Is detected as a particle of more particle size 0 .mu.m, pulse P ₂ is output from the second comparator circuit 15. At this time, also in the first comparison circuit 14, the detected scattered light intensity is greater than the threshold value TH _2, the pulse P ₁ is also output. Further, FIG. 5 (c) shows a case where the detected scattered light intensity threshold TH ₁ or less, in this case, the detection of the particles in the first and second comparator circuits 14 and 15 is not made Therefore, neither of the pulses P ₁ and P ₂ is output.

As described above, when the first and second comparison circuits 14 and 15 detect particles having two types of particle sizes, the first counting section 23 of the relay device E includes the first counting section 23. joined by detection pulse P ₁ from the comparison circuit 14, thereby, the first counting unit 23 counts the number NA of particles 0.3μm or more particle size within a given sampling time. The second counting section 24 includes the second comparison circuit 1
The detection pulse P ₂ from 5 join, thereby, in the second counting section 24 counts the number NB of particles 1.0μm or more particle size within a given sampling time. In this way, when the first and second counting units 23 and 24 count the numbers NA and NB of the two types of particle sizes within a fixed sampling time, these are stored in the storage unit 22. You.

Thereafter, when the central monitoring device 1 issues a data transfer command to the relay device E, the relay device E
Then, the detection results NA and NB of the number of particles having the two types of particle diameters stored in the storage unit 22 are read from the storage unit 22,
These are transmitted from the transmission circuit 26 to the central monitoring device 1 via the transmission line L.

In the central monitoring device 1, when the particle number detection results NA and NB are sent from the relay device E, the state of the monitoring space is determined based on these. FIG. 6 is a flowchart illustrating an example of the above-described determination processing in the central monitoring device 1. In the processing example of FIG. 6, the lowest level in the clean room where the cleanliness is determined to be temporarily reduced, that is, the cleanliness level is determined to be 0.3 μm to 1..
The particle density of particles up to 0 μm (number per 1 cubic foot) is defined by THA1, and the level determined to affect the work in the clean room, that is, the environmental abnormality determination level is 0.3 μm to 1. The particle density of particles up to 0 μm (number per cubic foot) is defined by THA2, and the level at which the possibility that a fire has occurred is judged to be very high, that is, the fire judgment level is 1.
The particle density of particles having a particle size of 0 μm or more (number per cubic foot) is defined by THB2.

Here, THA2 is set to a value larger than THA1, and THB2 is set to a value larger than THB1. For example, each judgment level, THA1, T
HA2 and THB2 are 5000 pieces / cf and 5 pieces, respectively.
0000 / cf, set to 250,000 / cf,
It is stored in the storage unit 32 in advance.

Referring to FIG. 6, first, the central monitoring device 1
Calls the relay device E and requests the relay device E to transmit the particle number data NA and NB of two types of particle diameters (step S1). Thus, when the particle number data NA and NB are sent from the relay device E, the central monitoring device 1 captures the particle number data NA and NB (step S).
2, 3). Next, by subtracting NB from the particle number data NA, the particle number NC (= NA−NB) having a particle diameter of 0.3 μm to 1.0 μm is calculated (step S).
4).

Next, the central processing unit 31 has a size of 0.3 μm
The particle number data NC having a particle size of up to 1.0 μm is compared with the cleanliness reduction determination level THA1 and the environmental abnormality determination level THA2 (steps S5 and S6). As a result, NC becomes TH
If it is not larger than A1, it is determined that the cleanliness of the clean room is not reduced. That is, it is determined to be "clean" (step S7). On the other hand, in Steps S5 and S6, when NC is larger than THA1 but not larger than THA2, it is determined that the cleanness of the clean room is reduced (Step S8).

On the other hand, in steps S5 and S6, NC
Is larger than THA1 and THA2,
The particle number data NB having a particle diameter of 1.0 μm or more is compared with the fire determination level THB2 (step S9). As a result,
If NB is greater than THB2, it is determined that a fire has occurred and a fire alarm is output (step S10).

On the other hand, in step S9, NB
If is not larger than THB2, for example, there is a possibility that a fire may occur at an extremely early stage, so that the state of the environment is determined in more detail. That is, the ratio NC / NB of the particle number data NC having a particle diameter of 0.3 μm to 1.0 μm and the particle number data NB having a particle diameter of 1.0 μm or more is determined.
It is determined whether or not NB is larger than a predetermined value K (for example, 50 to 100 is set in advance) (step S11). As a result, when the ratio NC / NB is larger than the predetermined value K,
Since particles having a small particle size of 0.3 μm to 1.0 μm are overwhelmingly large, it is not considered that a fire has occurred. Therefore, it is determined that the environment is abnormal due to contamination of the environment, that is, the clean room is abnormal (step S12). On the other hand, when the ratio NC / NB is not larger than the predetermined value K, there is a large proportion of particles having a large particle size of 1.0 μm or more. (Step S13).

In this way, the central processing unit 31 sets the value of 0.
The decrease in cleanliness of the clean room is monitored based on the particle number data NC having a relatively small particle size of 3 μm to 1.0 μm, and a fire alarm is performed based on the particle number data NB having a large particle size of 1.0 μm or more. The occurrence is detected, whereby a fire and an environmental abnormality other than the fire can be detected by one device. In particular, since the occurrence of a fire and the abnormality in the environment can be detected in a distinct manner, the frequency of occurrence of false reports and the like as in the related art can be reduced. Further, based on the ratio NC / NB between the particle number data NC of small particle diameters of 0.3 μm to 1.0 μm and the particle number data NB of large particle diameters of 1.0 μm or more, it is determined whether a clean room is abnormal or a caution is to be taken. Is also determined, the detection accuracy and the detection sensitivity of the state can be significantly improved.

Step S8, S10, S12 or S1
In 3, when it is determined that the degree of cleanliness is low, a fire alarm, a clean room is abnormal, or a caution is taken, an alarm is displayed on the output unit 36. In view of this, the operator can take a prescribed action.

In the above example, for convenience, one central monitoring device 1 monitors the state of a place where one particle detection device is installed, based on data from one particle detection device D and relay device E. Was explained, but usually,
As shown in FIG. 7, a plurality of fine particle detection devices D1 to Dn are installed at different installation locations, respectively, and a plurality of relay devices E1 to En are provided corresponding to each of these fine particle detection devices D1 to Dn. One central monitoring device 1 is configured to sequentially call the plurality of relay devices E1 to En by polling. That is, a unique address is set in advance for each of the relay devices E1 to En, and the central monitoring device 1 polls each of the relay devices E1 to En based on the address. in this case,
In the processing of FIG. 6, the central processing unit 31 of the central monitoring device 1 performs steps S1 to S1 for a certain relay device.
After performing the process of step 3, the address N is incremented by, for example, "1" (N = N + 1), set to the address of the next relay device, and the process returns to step S1 to repeat the same for the next relay device. Can be performed.

By the way, at this time, it may be determined that an environmental abnormality occurs at one installation location, and that a fire occurs at another installation location. In consideration of such a case, FIG.
As shown in the figure, the fire display portion 36a and the abnormal display portion 36
The output unit 36 can also be configured so that an alarm is displayed separately for b. When the output unit 36 has such a configuration, when it is determined that the environment is abnormal at a certain installation location, this alarm display is displayed on the abnormality display part 36b,
Further, when it is determined that a fire has occurred at another installation location, this alarm display is displayed on the fire display portion 36a, so that the operator can simultaneously know a plurality of types of alarms from a plurality of locations.

In the configuration of FIGS. 1 and 7, the relay devices E, E1 to En are provided separately from the particle detecting devices D, D1 to Dn as sensors. May be. For example, the relay devices E and E1
En may be incorporated in the particle detectors D, D1 to Dn.

Further, in the above-described embodiment, 0.3 μm
It is configured to detect two types of particles, a relatively small particle size of up to 1.0 μm and a large particle size of 1.0 μm or more, and make a judgment based on this. In practice, it is best to determine the environmental abnormality based on the above two types of particle diameters, and it is considered that this is sufficient. However, the present invention is not limited to this. That is, the size of the particle size, the range of the particle size, and the like can be changed according to the environment to which the environmental condition monitoring device is applied, the assumed abnormal condition, and the like. Can be detected, and a more detailed judgment can be made based on this.

In the above example, it is assumed that the environmental condition monitoring apparatus of the present invention is used in a clean air environment of a clean room. In this case, even particles such as smoke diluted by the clean air are detected with high sensitivity. Fire judgment and environmental abnormality judgment can be performed with high reliability, and it is particularly effective when used in a clean air environment such as a clean room. The present invention is not limited to this, and can be used under a normal environment. Also in this case, it is possible to reliably perform a fire determination, an environmental abnormality determination, and the like.

Further, in the above-described embodiment, in the relay device E, the number of particles NC having a particle size of 0.3 μm to 1.0 μm is set.
The number of particles having two different particle sizes, that is, the number of particles having a particle size of 1.0 μm or more and the number NB of particles having a particle size of 1.0 μm or more can be finally obtained. 3μ
Pulse detection of particles having a particle size of m to 1.0 μm is also possible. That is, the first comparison circuit 14 and that of the window comparator type, if to detect only the scattered light intensity between the threshold TH ₁ and TH ₂ in the first comparator circuit 14, 0.3Myuemu～1 Particles having a particle size of up to 0.0 μm can be directly detected. In this case, the first counting section 23 of the relay device E directly counts the NC, and supplies this to the central monitoring device 1. Therefore, the processing in step S4 in the central processing unit 31 of the central monitoring device 1 becomes unnecessary.

[0033]

As described above, according to the present invention, according to the invention of claim 1 Symbol placement, grain number of particles contained in the monitoring space径別
And the number calculating means
The condition of the monitoring space is determined based on the
Determining means for determining the state,
The stage is for each particle size determined by the number calculation means.
Number of particles included in the specified particle size range
NC is determined by a first determination level and a first determination level
The predetermined particle size range is compared with the larger second determination level.
The number value NC of the particles included in the box is higher than the first determination level.
Is greater than the second judgment level,
It is determined that the visual space environment is abnormal, and it is included in the specified particle size range.
The number value NC of the particles to be inserted is determined by the first judgment level and the second judgment level.
When it is higher than the judgment level, the state judgment means
Is the number for each particle size obtained by the number calculation means.
Among the numerical values, larger than the upper limit particle size of the predetermined particle size range.
Comparison of the number NB of particles with different particle sizes with the third judgment level
And a particle size larger than the upper limit particle size of the predetermined particle size range.
Is larger than the third determination level.
In the meantime, while judging that a fire has occurred in the monitoring space,
Particles having a particle size larger than the upper limit particle size of the predetermined particle size range
When the number of children NB is smaller than the third judgment level
Is the number value NC of particles included in a predetermined particle size range and
Of particles having a particle size larger than the upper limit of the predetermined particle size range.
The ratio NC / NB with the individual numerical value NB is determined, and this ratio NC / NB
Is larger than the predetermined value K, there is an environmental abnormality in the monitoring space.
If the ratio NC / NB is smaller than the predetermined value K,
To determine that there is a possibility of fire
Because that can be detected by distinction and an abnormality of the fire occurrence and the environment, to reduce the frequency of false alarms, etc., when the environment is dirty, this can be judged as an environmental abnormality.

[0034]

According to the second aspect of the present invention, when an environmental abnormality in the monitoring space or the occurrence of a fire is detected, the environmental abnormality is divided into an environment display portion, and the occurrence of a fire is divided into a fire display portion. When monitoring conditions in a plurality of different places, if there is an environmental abnormality in one place and a fire in another place, each warning display should be displayed separately. As a result, the operator can simultaneously know a plurality of types of alarms at a plurality of different locations.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of an embodiment of an environmental condition monitoring device according to the present invention.

FIG. 2 is a diagram illustrating a configuration example of a suction-type particle detection device.

FIG. 3 is a circuit diagram of the particle detector shown in FIG. 2;

FIG. 4 is a diagram illustrating a configuration example of a central monitoring device.

FIGS. 5A to 5C are diagrams illustrating examples of the scattered light intensity detected by the fine particle detector.

FIG. 6 is a flowchart illustrating a processing example of a central monitoring device.

FIG. 7 is a diagram showing a configuration example of an environmental condition monitoring device according to the present invention.

FIG. 8 is a diagram illustrating a configuration example of an output unit.

[Explanation of symbols]

D Suction-type particle detector E Relay device 1 Central monitoring device 3 Monitoring space (clean room) 4 Communication hole 5 Tube 6 Suction device 7 High-sensitivity particle detector 10 Light-emitting circuit 11 Light-receiving circuit 12 Filter circuit 13 Amplifying circuit 14 First Comparison circuit 15 second comparison circuit 21 central processing unit 22 storage unit 23, 24 calculation unit 25, 27 interface unit 26 transmission circuit 31 central processing unit 32 storage unit 33 transmission circuit 34, 37 interface unit 35 operation unit 36 output unit 36a fire display portion 36b trouble display portion TH _1, TH ₂ threshold

Claims (2)

(57) [Claims] 1. A number calculating means for determining the number of particles contained in a monitoring space for each particle size, and a state determination for determining a state of the monitoring space based on a number value for each particle size obtained by the number calculating means. Means for determining the state
The stage is for each particle size determined by the number calculation means.
Number of particles included in the specified particle size range
NC is determined by a first determination level and a first determination level
The predetermined particle size range is compared with the larger second determination level.
The number value NC of the particles included in the box is higher than the first determination level.
Is greater than the second judgment level,
It is determined that the visual space environment is abnormal, and it is included in the specified particle size range.
The number value NC of the particles to be inserted is determined by the first judgment level and the second judgment level.
When it is higher than the judgment level, the state judgment means
Is the number for each particle size obtained by the number calculation means.
Among the numerical values, larger than the upper limit particle size of the predetermined particle size range.
Comparison of the number NB of particles with different particle sizes with the third judgment level
And a particle size larger than the upper limit particle size of the predetermined particle size range.
Is larger than the third determination level.
In the meantime, while judging that a fire has occurred in the monitoring space,
Particles having a particle size larger than the upper limit particle size of the predetermined particle size range
When the number of children NB is smaller than the third judgment level
Is the number value NC of particles included in a predetermined particle size range and
Of particles having a particle size larger than the upper limit of the predetermined particle size range.
The ratio NC / NB with the individual numerical value NB is determined, and this ratio NC / NB
Is larger than the predetermined value K, there is an environmental abnormality in the monitoring space.
If the ratio NC / NB is smaller than the predetermined value K,
To determine that there is a possibility of fire
Environmental condition monitoring apparatus characterized by that. 2. The environmental status monitoring device according to claim 1 , wherein said status determination means detects an environmental abnormality or an occurrence of a fire in the monitored space, and displays the environmental abnormality in an environment display portion and a fire occurrence. An environmental condition monitoring device characterized in that an alarm is displayed separately for each fire display portion.