CARBON MONOXIDE TRANSDUCER

1 . A carbon monoxide transducer, comprising:

a main housing;

a lower support plate arranged in the main housing, wherein the lower support plate divides the main housing into a water chamber containing water below the lower support plate and a reaction chamber above the lower support plate;

a multilayer film assembly arranged in the reaction chamber on the lower support plate; and

a cover assembly on the multilayer film assembly, wherein the cover assembly comprises a top cover, an upper support plate, a filter body between the top cover and the upper support plate, and a sealing ring wrapped around an outer periphery of the top cover and the upper support plate;

wherein, a curling portion is formed at the top of the main housing that compresses the sealing ring of the cover assembly and the multilayer film assembly towards the lower support plate.

2 . The carbon monoxide transducer according to claim 1 , wherein the sealing ring is made of natural rubber, and the curling portion is arranged to compress the sealing ring and the multilayer film assembly, so that a total thickness of the sealing ring and the multilayer film assembly is compressed by 20% to 40%.

3 . The carbon monoxide transducer according to claim 2 , wherein the curling portion is arranged to compress the sealing ring and the multilayer film assembly, so that the total thickness of the sealing ring and the multilayer film assembly is compressed by 25% to 35%.

4 . The carbon monoxide transducer according to claim 1 , wherein the total thickness of the multilayer film assembly is compressed by at least 40%.

5 . The carbon monoxide transducer according to claim 4 , wherein the multilayer film assembly comprises: a first insulating diffusion layer on the lower support plate, a reaction film on the first insulating diffusion layer, a ring washer on the reaction film, and a second insulating diffusion layer, wherein the second insulating diffusion layer is located in a center hole of the ring washer, and an outer diameter of the ring washer is close to an inner diameter of the reaction chamber.

6 . The carbon monoxide transducer according to claim 5 , wherein the upper support plate abuts against the second insulating diffusion layer, the bottom of the sealing ring abuts against the ring washer, and an outer edge of the ring washer is pressed down to abut against the lower support plate.

7 . The carbon monoxide transducer according to claim 1 , wherein an inner side of the main housing has a shoulder, the lower support plate is arranged on the shoulder of the main housing, and the lower support plate and the main housing are made of conductive materials and are connected to each other.

8 . The carbon monoxide transducer according to claim 1 , wherein the top cover comprises a middle protruding portion and a plane portion at the outside of the middle protruding portion, the upper support plate is formed as a flat plate, the plane portion of the top cover abuts against the upper support plate, and the outer periphery is wrapped by the sealing ring, and wherein the top cover and the upper support plate are made of conductive materials and are connected to each other, the filter body is located in a chamber defined by the protruding portion of the top cover, the filter body is an activated carbon bag, and a gasket is further arranged between the filter body and the upper support plate.

9 . The carbon monoxide transducer according to claim 1 , further comprising: electrode sheets that are attached to the top cover and the bottom of the main housing respectively.

10 . The carbon monoxide transducer according to claim 1 , wherein a diameter of the water chamber is less than 15 mm and a height of the water chamber is less than 30 mm.