一种气体传感器

Abstract

本实用新型公开了一种气体传感器，其包括壳体和光学传感组件，壳体内具有容置腔，且所述壳体开设有连通所述容置腔的进气口和出气口。光学传感组件包括红外光源、红外传感件和若干反射镜，所述红外光源安装于所述容置腔，并发射红外信号，若干所述反射镜交错设置于所述容置腔内壁，以在若干所述反射镜之间形成曲折的反射路径，以使红外信号沿着反射路径传播，所述红外传感件安装于所述容置腔，其用于接收沿着反射路径传播的红外信号。由于红外信号经由各个反射镜的反射后，使得红外信号沿着曲折的反射路径，延长了红外信号在容置腔内的传播路径长度，使得红外信号受气流影响的偏折更为明显，提高了气体传感器的灵敏度。

Claims

1. A gas sensor, characterized by, include: A housing having a cavity inside, and the housing having an air inlet and an air outlet communicating with the cavity; as well as An optical sensing assembly includes an infrared light source, an infrared sensor, a plurality of reflectors, a plurality of limiting members corresponding one-to-one with the plurality of reflectors, and a plurality of adjusting members. The infrared light source is installed in the accommodating cavity and emits infrared signals. The plurality of reflectors are staggered on the inner wall of the accommodating cavity to form a tortuous reflection path between the plurality of reflectors, so that the infrared signals propagate along the reflection path. The reflectors are rotatably mounted in the housing. The limiting members are drively connected to the reflectors and have a first state that restricts the rotation of the reflectors and a second state that allows the reflectors to rotate. The adjusting component is connected to the reflector to drive the reflector to rotate. The adjusting component includes a drive shaft, a drive gear, a drive gear, and a handle. The drive shaft is rotatably mounted on the housing and passes through the housing and connects to the reflector. The drive gear is sleeved on the end of the drive shaft away from the reflector. The handle is rotatably mounted on the outer wall of the housing. The drive gear is sleeved on the rotating end of the handle and meshes with the drive gear. The infrared sensor is installed in the accommodating cavity and is used to receive infrared signals propagating along the reflection path.

2. The gas sensor according to claim 1, characterized by The inner wall of the housing has a plurality of rotating holes and a plurality of screw holes corresponding one-to-one with the plurality of reflectors, and the plurality of screw holes are connected one-to-one with the plurality of rotating holes. The reflector includes a rotating shaft, which is rotatably mounted in the rotating hole so that the reflector rotates relative to the housing. The limiting member includes a limiting bolt, which is screwed into the screw hole. The bolt presses against or disengages from the rotating shaft so that the limiting member switches between the first state and the second state.

3. The gas sensor according to claim 2, characterized in that, The end of the screw hole away from the rotating hole is connected to the outer wall of the housing.

4. The gas sensor according to claim 1, characterized by The gas sensor includes an air inlet nozzle, which is installed at the air inlet and has several drainage ports that communicate with the accommodating cavity.

5. The gas sensor according to claim 4, characterized in that Several of the aforementioned drainage ports are arranged circumferentially along the air inlet.

6. The gas sensor according to claim 1, characterized by The inner wall of the housing has several storage slots that correspond one-to-one with the several reflectors, and the reflectors are at least partially hidden in the storage slots.

7. The gas sensor according to claim 1, characterized by The gas sensor includes a flange, which is mounted at the bottom of the housing.

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