Air-pump-free alcohol tester and detection circuit
A detection circuit and airless pump technology, which is applied in the field of law enforcement detection equipment, can solve the problems of large inhalation volume, easy inhalation of too much air, and large error in alcohol detection results, so as to reduce the possibility and improve the accuracy
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[0037] The following is attached Figure 1-7 The application is described in further detail.
[0038] The embodiment of the present application discloses an airless pump type alcohol tester.
[0039] refer to figure 1 , an airless pump type alcohol tester, comprising an airflow channel 1, the airflow channel 1 is arranged inside the alcohol tester, and is used to provide a path for the gas sample collected by the alcohol tester to flow into and out of the alcohol tester, and the airflow channel 1 is provided with a useful For the pumping assembly driven by the flow of the gas sample, the pumping assembly includes two one-way doors 21 fixed on the inner wall of the gas flow channel 1. The one-way door 21 is in the shape of a sheet and made of PET material. The doors 21 are all semicircular and symmetrically arranged. The one-way doors 21 in the airflow channel 1 are gradually inclined to the gas flow direction from the direction close to the inner wall of the airflow channel ...
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