Patent ID: 6917296
Filing Date: 2005-07-12
Classification: G08B

Abstract:
1. A fire heat sensor comprising: a high-temperature detecting portion provided with a temperature detecting element which exhibits a fast heat response to a rise in ambient temperature; a low-temperature detecting portion provided with a temperature detecting element which exhibits a slow heat response to a rise in ambient temperature; and a resin member by which said high-temperature detecting portion and said low-temperature detecting portion are integrally formed so that heat energy is transferred from the temperature detecting element of said high-temperature detecting portion to the temperature detecting element of said low-temperature detecting portion; wherein differential heat sensing is performed based on temperatures detected by said low-temperature detecting portion and said high-temperature detecting portion; and said low-temperature detecting portion and said high-temperature detecting portion are ambient temperature oriented so that said differential heat sensing of said high-temperature detecting potion tends to receive more heat energy than said low-temperature detecting portion.