Electrophoretic apparatus,electronic instrument
A smoke detector and smoke detection technology, which is applied in the direction of instruments, fire alarms and alarms based on smoke/gas effects, can solve the problems of stagnant airflow, multiple spaces, and no one, and achieve the suppression of airflow pressure loss, Airflow pressure loss suppression, pressure loss reduction effect
Inactive Publication Date: 2004-03-31
HOCHIKI CORP
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Problems solved by technology
For this reason, the size of the sampling tube type smoke detector is constrained, and it is difficult to perform the stability of the target
In the cavity, inside there is such a situation that part of the airflow stagnates and does not contribute to the stability of the suction
[0010] Also, in the first conventional embodiment, since most of the main body is used as a cavity, miniaturization is difficult
Since the signal processing components from the smoke sensor unit, the power circuit, etc. are located outside the detector body, the entire device requires a lot of space
[0011] In addition, in the second conventional embodiment described above, without a cavity formed, the flow path directly guides the air from the smoke detection device to the aspirator, and miniaturization can be achieved
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[0041] The present invention will be described in detail hereinafter with reference to preferred embodiments shown in the accompanying drawings. figure 1 is a front view showing the internal structure of the detector main body in the embodiment. figure 2 Yes figure 1 right side view of . image 3 is the front view of the smoke detection device in the embodiment. Figure 4 is a cross-sectional view of an introduction pipe constituting a smoke detection device and an interconnection portion in an embodiment of the present invention.
[0042] The sampling tube type smoke detector in this embodiment includes the sampling tube 3 having the suction port 42 formed in the monitoring area. The smoke detection device 1 detects smoke particles contained in the air sucked through the sampling pipe 3 . The aspirator 2 is formed downstream of the smoke detection device 1 . The smoke detection device 1 and the aspirator 2 are connected via an interconnection 15 . Among the component...
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In a sampling tube-type smoke detector equipped with a smoke detection device detects smoke particles contained in the air suctioned from a monitored area through a sampling tube by an aspirator positioned in the downstream. The smoke detection device the sampling tube forms a lead-in tube and suctions air through the sampling tube in an almost straight line. The lead-in tube is formed with a smoke sensor unit to detect smoke particles contained in the air. The aspirator comprises a rotating part which forms an actuator mechanism that discharges the air. The central axis of the lead-in tube and the rotational axis of the actuator mechanism of the aspirator are almost the same axle. The sampling tube-type smoke detector is provided to reduce pressure loss in the airflow traveling from the smoke detection device to the aspirator and to supply a low cost, compact smoke detection device driven by a small-sized fan.
Description
technical field [0001] The present invention relates to a sampling tube type smoke detector, which sucks air into a sampling tube from a monitoring area, and uses a laser beam to optically detect smoke particles suspended in the air, in particular to a sampling tube type smoke detector, This consists of a smoke detection unit and an aspirator mounted in-line and compactly arranged in line with it. Background technique [0002] Conventionally, high-sensitivity smoke detectors that detect minute smoke are used in clean rooms such as computer rooms, hospitals, semiconductor manufacturing plants, and the like. The high-sensitivity smoke detector of the present invention sucks air from a sampling pipe (synonymous with duct) installed in a monitoring area, and optically detects the amount of particles suspended in this air with a laser beam. Therefore, a high-sensitivity smoke detector having a sampling tube is hereinafter referred to as a sampling...
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IPC IPC(8): G08B17/10G08B17/107
CPCG08B17/10G08B17/107G08B17/113
Inventor 山野直人江川仁隆
Owner HOCHIKI CORP