The aftertaste of the range hood or the sealing of the smoke exhaust pipe and the flue is not good. If the smoke exhaust pipe is under the ceiling, it can be sealed with adhesive or sealant. If it is above the ceiling, remove the smoke blocking part of the pipe and use glass glue. It is also possible that the two sides of the exhaust hose are not tightly connected, resulting in falling off or fracture, so that it has no peculiar smell, so it is necessary to replace an exhaust pipe.

，煙管和公共煙道密封不好;

First, the smoke pipe and the public flue are not well sealed;

解決方案:假如煙機管在吊頂下，可以考慮用透明膠包裹，或者用玻璃膠密封、密封。假如煙機管在吊頂上面，分為兩種情況，假如是整體吊頂，取下一小塊，然后用玻璃膠密封，假如是扣板吊頂，那就要拆下部分吊頂，才能打膠。

Solution: if the cigarette machine pipe is under the ceiling, it can be wrapped with transparent glue, or sealed with glass glue. If the cigarette machine pipe is above the ceiling, it can be divided into two situations. If it is the overall ceiling, take down a small piece, and then seal it with glass glue. If it is the gusset plate ceiling, then remove part of the ceiling, and then glue it.

第二個方面:排煙機逆止回閥,反向止回閥的兩個半圓式活動停止,打開排氣時,關閉時停止,但由于油越來越多的積累,停止塊活動受到限制,甚不開放,油煙排不出去;

The second aspect: the two semicircle activities of the smoke exhaust check valve and the reverse check valve stop. When the exhaust is opened, they stop when the exhaust is closed. However, due to the accumulation of more and more oil, the stop block activity is limited, even not open, and the oil smoke cannot be discharged;

解決方案:更換或清洗止回閥。

Solution: replace or clean the check valve.

第三方面:抽油煙機的排氣軟管，兩端連接不嚴密，脫落、斷裂會造成空氣回漏味;

The third aspect: the exhaust hose of the range hood is not tightly connected at both ends, falling off and breaking will cause air leakage;

解決方案:更換排氣軟管或擰緊排氣軟管。

Solution: replace or tighten the vent hose.

第四方面:煙道問題，由于煙道拆除，自己的房間開裂、堵塞、漏煙或樓上進入管道，造成排煙不暢通，煙堵，造成反味。同樣，如果廁所排氣問題也是這個原因。

The fourth aspect: the problem of flue. Due to the removal of the flue, the room itself is cracked, blocked, leaking smoke or entering the pipeline upstairs, resulting in the blocked exhaust gas and anti odor. Similarly, if the toilet exhaust problem is also the cause.

解決方案:這個原因比較難解決，更好找物業。

Solution: it's hard to solve this problem. It's better to find a property.