US 2020/0265697 A1 · SMOKE DETECTOR AND METHOD FOR DETECTING SMOKE

Abstract

A smoke detector comprising a body, having a detection chamber therein; a first transmitting tube and a second transmitting tube, arranged in the body and configured to be capable of transmitting a first ray of light and a second ray of light into the detection chamber, respectively; a receiving tube, where the first ray of light and the second ray of light can be incident after refraction and/or scattering, and which generates outputs according to the intensity of incident light; and a control device, coupled with the receiving tube to receive a first output generated by the first ray of light on the receiving tube and a second output generated by the second ray of light on the receiving tube, and configured to determine whether there is a fire based on a difference or ratio between the first output and the second output, or the combination thereof.

Claims20

Dependent claims

A smoke detector, comprising:

a body, having a detection chamber therein;
a first transmitting tube and a second transmitting tube, arranged in the body and configured to be capable of transmitting a first ray of light and a second ray of light into the detection chamber respectively;
a receiving tube, where the first ray of light and the second ray of light can be incident after refraction and/or scattering, and which generates an output according to the intensity of incident light;
and
a control device, coupled with the receiving tube to receive a first output generated by the first ray of light on the receiving tube and a second output generated by the second ray of light on the receiving tube, and configured to determine whether there is a fire based on a difference, ratio or combination between the first output and the second output.

2 more elements

A method for detecting smoke, comprising:

lighting a first transmitting tube, emitting a first ray of light, and allowing the first ray of light to be incident onto a receiving tube after being refracted and/or scattered by smoke, to generate a first output;
lighting a second transmitting tube, emitting a second ray of light, and allowing the second ray of light to be incident onto the receiving tube after being refracted and/or scattered by smoke, to generate a second output;
and
determining whether there is a fire based on a difference, ratio or combination between the first output and the second output.

1 more element

Dependencies are inferred from the claim text.

Smoke detector and method for detecting smoke

Life of this patent

Smoke detector and method for detecting smoke

Life of this patent

Abstract

Claims20