Formaldehyde detection device

The utility model relates to a detection device, in particular to a formaldehyde detection device. Formaldehyde detection device shell, wherein a cooling chamber, a heating chamber and a formaldehydedetection chamber are sequentially arranged in the formaldehyde detection device shell; a first connecting hole for communicating the cooling chamber with the heating chamber is formed between the cooling chamber and the heating chamber; a second connecting hole for communicating the heating chamber with the formaldehyde detection chamber is formed between the heating chamber and the formaldehydedetection chamber; the heating chamber and the formaldehyde are provided with air inlets; the formaldehyde detection chamber is provided with an exhaust port; the cooling chamber is provided with cooling liquid, a refrigerating device is arranged in the cooling liquid, the air inlet is connected with the first connecting hole through an air inlet pipe, the air inlet pipe is soaked in the cooling liquid, a drying device is