ODOR GENERATION ALARM AND METHOD FOR INFORMING UNUSUAL SITUATION

1. An odor generation alarm, comprising:

an odorant receptacle containing an odorant whose concentration in air at which a person can no longer tolerate a strength of smell is lower than a no observed effect concentration of the odorant;

a drive section which emits the odorant from the odorant receptacle;

a detector which detects occurrence of an unusual situation, and outputs a detection signal; and

a controller which, when the detection signal is inputted from the detector, causes the drive section to emit the odorant in accordance with the detection signal.

2. The odor generation alarm of claim 1, wherein the drive section causes the odorant to be emitted from the odorant receptacle into a space outside the alarm, and makes the concentration of the odorant in the space outside the alarm be a predetermined concentration which is lower than the no observed effect concentration, thereby a person in a sleeping condition in the space outside the alarm is awakened.

3. The odor generation alarm of claim 1, wherein the odorant includes allyl isothiocyanate.

4. The odor generation alarm of claim 3, wherein the drive section causes the odorant to be emitted from the odorant receptacle, and makes the concentration in air of allyl isothiocyanate in the space outside the alarm be 1 ppm or more and 74.3 ppm or less by amount of substance.

5. The odor generation alarm of claim 4, wherein the concentration of allyl isothiocyanate is 5 ppm or more and 20 ppm or less by amount of substance.

6. A method for informing an unusual situation, using an odorant receptacle containing an odorant whose concentration in air at which a person can no longer tolerate a strength of smell is lower than a no observed effect concentration of the odorant, a drive section which emits the odorant from the odorant receptacle, a detector which detects occurrence of an unusual situation and outputs a detection signal, and a controller which, when the detection signal is inputted from the detector, causes the drive section to work in accordance with the detection signal to cause the odorant to be emitted, the method comprising:

a detection process of detecting the occurrence of an unusual situation with the detector; and

an odorant emission process of, when the occurrence of the unusual situation is detected in the detection process, causing the drive section to work by the controller to cause the odorant to be emitted from the odorant receptacle.

7. The odor generation alarm of claim 2, wherein the odorant includes allyl isothiocyanate.