To suppress a variation of a wind velocity in a sensing point, in powder dust detection device for generating an airflow at the sensing point of a powder dust sensor by using an airflow in an air-conditioning unit.SOLUTION: An opening adjustment device 42 adjusts a passage opening of an adjustment objective passage 421a so as to suppress a variation of a wind volume flowing in the adjustment objective passage 421a by wind pressure P1 which is received by a passage damper 421. Therefore, the opening adjustment device 42 autonomously operates by the wind pressure P1 which is received by the passage damper 421, and the variation of the wind volume of the adjustment objective passage 421a can be suppressed without the necessity of electrical control. Then, since a wind velocity of a sensor passage being a sensing point of a powder dust sensor becomes low as the wind volume of the adjustment objective passage 421a is small, a variation of a wind velocity of the sensor passage can be also suppressed by suppressing the variation of the wind volume of the adjustment objective passage 421a.SELECTED DRAWING: Figure 2

    【課題】空調ユニット内の空気流れを利用して粉塵センサのセンシング箇所に空気流れを生じさせる粉塵検出装置において、そのセンシング箇所における風速の変動を抑制する。【解決手段】開度調整装置42は、通路ダンパ421が受ける風圧P1によって、調整対象通路421aに流れる空気の風量の変動を抑えるように調整対象通路421aの通路開度を調整する。従って、開度調整装置42は、通路ダンパ421が受ける風圧P1によって自律的に作動し、電気的な制御を必要とせずに、調整対象通路421aの風量の変動を抑えることができる。そして、粉塵センサのセンシング箇所であるセンサ通路の風速はその調整対象通路421aの風量が小さいほど小さくなるので、その調整対象通路421aの風量の変動が抑えられれば、センサ通路の風速の変動も抑えられる。【選択図】図2


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    Title :

    POWDER DUST DETECTION DEVICE


    Additional title:

    粉塵検出装置


    Contributors:

    Publication date :

    2020-07-09


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60H ARRANGEMENTS OR ADAPTATIONS OF HEATING, COOLING, VENTILATING, OR OTHER AIR-TREATING DEVICES SPECIALLY FOR PASSENGER OR GOODS SPACES OF VEHICLES , Anordnung oder Einbau der Heizung, Kühlung, Lüftung oder anderer Luftbehandlungsvorrichtungen für die Fahrzeugräume für Reisende oder Fracht



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