The iron smoke exhaust hood is only a rectangular iron hood, with a hole on top to connect to the smoke exhaust pipe, and is covered above the stove. By utilizing the principle of hot air rising, the oil fumes are naturally drawn out of the room. This type of smoke exhaust hood has a simple process and low cost, but its smoke exhaust effect is poor, and it is only suitable for small dining places with low smoke. Currently, there are no finalized products, but they are made on-site based on the size of the stove. The following requirements:

（1）油烟吸收率应大于95%，采用同诳导流围护装置。

(1) The absorption rate of oil fume should be greater than 95%, and the same diversion enclosure device should be used.

（2）围护结构应配有铰接式检查门,以便于卫生清洁及观察。

(2) The enclosure structure should be equipped with hinged inspection doors for easy hygiene, cleaning, and observation.

（3）设备全部由不锈钢制成，所有联结处为防水、防蒸汽、防油烟。

(3) All equipment is made of stainless steel, and all connections are waterproof, steam proof, and oil smoke proof.

（4）风罩嵌入吊顶内，两者之间设有不锈钢装饰板，用厚度1.2mm的不锈钢板制造，易拆卸，嵌入深度≥100mm。

(4) The wind hood is embedded in the suspended ceiling, and there is a stainless steel decorative plate between the two. It is made of 1.2mm thick stainless steel plate, easy to disassemble, and the embedding depth is ≥ 100mm.

（5）全部罩体用厚度大于1.0mm的不锈钢板制造。

(5) All covers are made of stainless steel plates with a thickness greater than 1.0mm.

（6）通风管用1.0镀锌板制成，设有不锈钢铁风量调节阀。

(6) The ventilation pipe is made of 1.0 galvanized sheet and is equipped with a stainless steel iron air volume regulating valve.

（7）照明设备是防溅，防水、内凹型的，分布于每1000mm距离，并应将所有电线套于导管中，用接驳箱连接。照度装置大于等于600lux，采用芝光管灯,统一的电力接口。

(7) The lighting equipment is splash proof, waterproof, and concave in shape, distributed every 1000mm distance, and all wires should be sheathed in conduits and connected using a junction box. The illumination device is greater than or equal to 600lux, using energy-saving light tube lamps and a unified power interface.

（8）风罩竖板带有一体环绕的自排装置，排放槽易于清洗油烟、蒸汽，排放管为不锈钢制，并联风罩的全自动自清洁装置。

(8) The vertical plate of the wind hood is equipped with an integrated self cleaning device, which is easy to clean oil fumes and steam in the discharge groove. The discharge pipe is made of stainless steel and connected in parallel to the fully automatic self cleaning device of the wind hood.