Photoelectric smoke alarms leds harmful?
You and your family are safe. IR radiation is low frequency 'heat' radiation, which if strong enough would be felt as heat.

The burners on your stove put out far more heat radiation. You must be confusing it with UV (Ultra-Violet) radiation which is very high frequency light. The sun puts out a lot of it, and that is what gives you sunburn.

Some white LED's put out a small amount of UV light and the manufacture often warns you if they do, as it can damage the retina in your eyes if you dare to stare at it. Some high-end smart phones use weak UV light to do a retina scan, but it is weak enough and brief enough to be safe.