Carbon monoxide sensor

Abstract

The utility model discloses a carbon monoxide sensor which comprises a metal barrel shell, a negative electrode connecting piece is arranged at the bottom of the metal barrel shell, an insulating pad is arranged above the negative electrode connecting piece, a positive electrode piece is arranged above the insulating pad, a positive electrode connecting piece is fixed at the bottom of one side of the positive electrode piece, and a negative electrode connecting piece is fixed at the bottom of the other side of the positive electrode piece. A large gas diffusion layer is arranged above the positive plate, an electrolytic film is arranged above the large gas diffusion layer, a small gas diffusion layer is arranged above the electrolytic film, a sealing gasket is arranged on the positive plate, an insulating spacer is arranged above the sealing gasket, a gas inlet control plate is arranged above the insulating spacer, and a gas outlet control plate is arranged above the gas inlet control plate. Through the comprehensive design of the scheme, the process of the sensor is simplified, the size is reduced, the service life is prolonged, and the sensor can be applied to more industrial designs.

Description

TECHNICAL FIELD

[0001] The utility model relates to a carbon monoxide gas sensor technical field, specifically, relate to electrochemical carbon monoxide sensor. BACKGROUND

[0002] Carbon monoxide sensor is a kind of core component of alarm equipment specially used to detect carbon monoxide concentration in air, when carbon monoxide concentration exceeds the set safety value, alarm will issue sound and light alarm signal, remind people to take corresponding measures to avoid carbon monoxide poisoning accident.

[0003] Some carbon monoxide sensors in prior art have the following problems:

[0004] 1. Volume is too large, and application range is limited;

[0005] 2. Production process is complex;

[0006] 3. Catalyst in sensor is long-term contacted with electrolyte, leading to activity reduction, and service life of sensor is obviously shortened;

[0007] 4. Sensor is easily failed due to electrolyte water loss and dryness.

[0008] For the problems in the related art, there is no effective solution at present. UTILITY MODEL CONTENT

[0009] For the problems in the related art, the utility model provides carbon monoxide sensor to overcome the above technical problems existing in prior art.

[0010] Therefore, the utility model adopts the specific technical scheme as follows:

[0011] Carbon monoxide sensor, including metal barrel shell, activated carbon, hole negative plate, air inlet control board, insulating gasket, sealing gasket, small gas diffusion layer, electrolytic membrane, large gas diffusion layer, positive plate, positive connection piece, insulating pad, negative connection piece, the bottom of metal barrel shell is provided with negative connection piece, the top of negative connection piece is provided with insulating pad, the top of insulating pad is provided with positive plate, the bottom of one side of positive plate is fixed with positive connection piece, the top of positive plate is provided with large gas diffusion layer, the top of large gas diffusion layer is provided with electrolytic membrane, the top of electrolytic membrane is provided with small gas diffusion layer, and the positive plate is provided with sealing gasket, the top of sealing gasket is provided with insulating gasket, the top of insulating gasket is provided with air inlet control board, and the top of air inlet control board is provided with hole negative plate.

[0012] As a further scheme of the utility model, the positive connection piece penetrates the insulating pad.

[0013] The metal barrel shell is internally provided with activated carbon.

[0014] The middle position of the insulating gasket is provided with an air inlet control hole.

[0015] The middle position of the hole negative plate is provided with an internal air inlet hole.

[0016] The internal air inlet hole and the air inlet control hole are coaxially arranged.

[0017] The upper side of the metal barrel shell is provided with an external air inlet hole.

[0018] The upper inner wall of the metal barrel shell and the upper side of the internal air inlet hole are both provided with gas filter paper.

[0019] The special reaction film replaces the water storage barrel, the special activated carbon adsorption device is used to filter interference gas, the volume of the whole product is miniaturized, better space is provided for appearance design, the sensor is simplified in process, the volume is reduced, the service life is prolonged, and the sensor can be applied to more industrial designs. BRIEF DESCRIPTION OF DRAWINGS

[0020] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed in the embodiments will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0021] Fig. 1 It is a whole structure schematic view of the carbon monoxide sensor according to the embodiment of the present application.

[0022] Fig. 2 It is an explosion schematic view of the carbon monoxide sensor according to the embodiment of the present application.

[0023] In the drawings:

[0024] 1, metal barrel shell; 2, activated carbon; 3, hole negative plate; 4, air inlet control plate; 5, insulating gasket; 6, sealing gasket; 7, small gas diffusion layer; 8, electrolytic film; 9, large gas diffusion layer; 10, positive plate; 11, positive connection piece; 12, insulating pad; 13, negative connection piece; 14, internal air inlet hole; 15, air inlet control hole; 16, external air inlet hole; 17, gas filter paper. DETAILED DESCRIPTION

[0025] To further illustrate the embodiments, the utility model provides with the drawings, these drawings are part of the utility model disclosure, it mainly used to illustrate the embodiment, and can cooperate with the related description of the specification to explain the operation principle of the embodiment, cooperate with reference to these contents, the person skilled in the art should be able to understand other possible implementation ways and the advantages of the utility model, the components in the drawing are not drawn according to scale, and similar component symbols are usually used to represent similar components.

[0026] According to the embodiment of the utility model, a carbon monoxide sensor is provided.

[0027] Please refer to the description of the drawings Figs. 1-2 According to the carbon monoxide sensor provided by the embodiment of the utility model, the bottom of the metal barrel shell 1 is provided with a negative electrode connecting piece 13, the upper side of the negative electrode connecting piece 13 is provided with an insulating pad 12, the upper side of the insulating pad 12 is provided with a positive electrode piece 10, the bottom of one side of the positive electrode piece 10 is fixedly provided with a positive electrode connecting piece 11, the upper side of the positive electrode piece 10 is provided with a large gas diffusion layer 9, the upper side of the large gas diffusion layer 9 is provided with an electrolytic film 8, the upper side of the electrolytic film 8 is provided with a small gas diffusion layer 7, the positive electrode piece 10 is provided with a sealing pad 6, the upper side of the sealing pad 6 is provided with an insulating pad 5, the upper side of the insulating pad 5 is provided with an air inlet control plate 4, the upper side of the air inlet control plate 4 is provided with a perforated negative electrode piece 3, the positive electrode connecting piece 11 penetrates through the insulating pad 12, the inside of the metal barrel shell 1 is provided with activated carbon 2, the middle position of the insulating pad 5 is provided with an air inlet control hole 15, the middle position of the perforated negative electrode piece 3 is provided with an internal air inlet hole 14, the internal air inlet hole 14 and the air inlet control hole 15 are coaxially arranged, the upper side of one side of the metal barrel shell 1 is provided with an external air inlet hole 16, and the upper side of the inner wall of the metal barrel shell 1 and the upper side of the internal air inlet hole 14 are both provided with a gas filter paper 17.

[0028] The special reaction film replaces the water storage barrel, special activated carbon adsorption devices are used to filter interfering gases, the volume of the whole product is super small, better space is provided for appearance design, through the comprehensive design of the scheme, the sensor process is simplified, the volume is reduced, the service life is prolonged, and the sensor can be applied to more industrial designs.

[0029] In use, CO+H2O→CO2+2H++2e- 1 / 2O2+2H++2e-→H2O

[0030] The electrolysis membrane 8 has the function of adsorbing water in air, and when there is carbon monoxide gas outside, carbon dioxide and 2H+ions and 2e-are generated under the action of the catalyst of the electrolysis membrane 8, so that an electric current is generated, the size of the electric current can be detected by an external circuit, and the size of the electric current can be converted into the size of the CO concentration. In addition, the electrolysis membrane 8 also has the function of synthesizing water, and O2, H+and e-can generate a part of water, so as to supplement a part of water, and make the dry environment more stable.

[0031] The above is only a preferred embodiment of the present application, and is not used to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A carbon monoxide sensor comprising a metal barrel shell (1), activated carbon (2), a porous negative electrode sheet (3), an air inlet control plate (4), an insulating gasket (5), a sealing gasket (6), a small gas diffusion layer (7), an electrolytic membrane (8), a large gas diffusion layer (9), a positive electrode sheet (10), a positive electrode connecting sheet (11), an insulating gasket (12), and a negative electrode connecting sheet (13), characterized in that: The bottom of the metal barrel shell (1) is provided with a negative electrode connecting piece (13), the upper side of the negative electrode connecting piece (13) is provided with an insulating pad (12), the upper side of the insulating pad (12) is provided with a positive electrode piece (10), one side of the positive electrode piece (10) is fixedly provided with a positive electrode connecting piece (11), the upper side of the positive electrode piece (10) is provided with a large gas diffusion layer (9), the upper side of the large gas diffusion layer (9) is provided with an electrolytic film (8), the upper side of the electrolytic film (8) is provided with a small gas diffusion layer (7), the positive electrode piece (10) is provided with a sealing pad (6), the upper side of the sealing pad (6) is provided with an insulating pad (5), the upper side of the insulating pad (5) is provided with an air inlet control plate (4), and the upper side of the air inlet control plate (4) is provided with a perforated negative electrode piece (3). ​ 2. The carbon monoxide sensor according to claim 1, wherein: The positive electrode connecting piece (11) penetrates the insulating pad (12).

3. The carbon monoxide sensor of claim 1, wherein: The inside of the metal barrel shell (1) is provided with activated carbon (2).

4. The carbon monoxide sensor of claim 1, wherein: The middle position of the insulating pad (5) is provided with an air inlet control hole (15).

5. The carbon monoxide sensor of claim 4, wherein: The middle position of the perforated negative electrode piece (3) is provided with an internal air inlet hole (14).

6. The carbon monoxide sensor of claim 5, wherein: The internal air inlet hole (14) and the air inlet control hole (15) are coaxially arranged.

7. The carbon monoxide sensor of claim 1, wherein: The upper side of the metal barrel shell (1) is provided with an external air inlet hole (16).

8. The carbon monoxide sensor of claim 5, wherein: The upper side of the metal barrel shell (1) and the upper side of the internal air inlet hole (14) are both provided with a gas filter paper (17).

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