DIFFERENTIAL DISTRIBUTION TYPE SENSOR

• Main Authors: KAWAZOE TOMOYOSHI, MATSUDA DAIZO
• Format: Patent
• Language: English; Japanese
• Published: 03.04.2024
• Subjects: ALARM SYSTEMS; ORDER TELEGRAPHS; PHYSICS; SIGNALLING; SIGNALLING OR CALLING SYSTEMS

To provide a differential distribution type sensor which can easily perform a test.SOLUTION: A differential distribution type sensor 1 for sensing a fire by detecting pressure rise in an air pipe 2 laid in a warning area comprises: the air pipe 2; an air pipe connection part 4 which is connected with the air pipe 2; a pressure sensor 5 which detects the pressure in the air pipe 2; air injection means (test pump) 6 which injects the air via the air pipe connection part 4 into the air pipe 2 in the time of testing; and a determination processing unit 7 which determines a fire on the basis of an output value of the pressure sensor 5 and determines a test result in the time of testing. A first passage 4e which connects a first connection hole part 4a with a leak hole part 4d and a second passage 4f which connects a second connection hole part 4b with a test hole part 4c are provided as internal passages in the air pipe connection part 4. The first passage 4e and the second passage 4f are provided as the passages that are fixed all the time.SELECTED DRAWING: Figure 1 【課題】簡単に試験を行うことができる差動式分布型感知器を提供する。【解決手段】警戒区域に敷設される空気管２内の圧力上昇を検知して火災を感知する差動式分布型感知器１であって、空気管２と、空気管２が接続される空気管接続部４と、空気管２内の圧力を検知する圧力センサ５と、試験時、空気管２内に空気管接続部４を介して空気を注入する空気注入手段（テストポンプ）６と、圧力センサ５の出力値に基づいて、火災判定を行うと共に、試験時には、試験結果の判定を行う判定処理部７と、を備える。空気管接続部４の内部には、内部通路として、第１接続孔部４ａとリーク孔部４ｄを連通する第１通路４ｅと、第２接続孔部４ｂと試験孔部４ｃを連通する第２通路４ｆが設けられる。第１通路４ｅと第２通路４ｆは、いずれも、常時固定の通路として設けられる。【選択図】図１