Carbon monoxide sensor

Abstract

The invention 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 to the bottom of one side of the positive electrode piece, and a negative electrode connecting piece is fixed to 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 present invention relates to the technical field of carbon monoxide gas sensors, in particular to an electrochemical carbon monoxide sensor. Background Art

[0002] The carbon monoxide sensor is a core component of an alarm device specifically used to detect the concentration of carbon monoxide in the air. When the concentration of carbon monoxide exceeds the set safety value, the alarm will emit an audible and visual alarm signal to remind people to take appropriate measures to avoid carbon monoxide poisoning accidents.

[0003] Some carbon monoxide sensors in the prior art have the following problems: 1. The volume is too large and the application scope is limited; 2. The production process is complicated; 3. The catalyst in the sensor is in contact with the electrolyte for a long time, resulting in reduced activity and significantly shortened sensor service life; 4. The sensor may fail due to electrolyte loss and drying up.

[0004] Currently, no effective solution has been proposed for the problems in the related technologies. Summary of the invention

[0005] In view of the problems in the related art, the present invention proposes a carbon monoxide sensor to overcome the above technical problems existing in the existing related art.

[0006] To this end, the specific technical solution adopted by the present invention is as follows: A carbon monoxide sensor comprises a metal barrel shell, activated carbon, a porous negative electrode sheet, an intake control plate, an insulating gasket, a sealing gasket, a small gas diffusion layer, an electrolytic membrane, a large gas diffusion layer, a positive electrode sheet, a positive electrode connecting sheet, an insulating gasket, and a negative electrode connecting sheet. A negative electrode connecting sheet is arranged at the bottom of the metal barrel shell, an insulating gasket is arranged above the negative electrode connecting sheet, a positive electrode sheet is arranged above the insulating gasket, a positive electrode sheet is arranged above the insulating gasket, a positive electrode connecting sheet is fixed to the bottom of one side of the positive electrode sheet, a large gas diffusion layer is arranged above the positive electrode sheet, an electrolytic membrane is arranged above the large gas diffusion layer, a small gas diffusion layer is arranged above the electrolytic membrane, a sealing gasket is arranged on the positive electrode sheet, an insulating gasket is arranged above the sealing gasket, an intake control plate is arranged above the insulating gasket, and a porous negative electrode sheet is arranged above the intake control plate.

[0007] As a further solution of the present invention, the positive electrode connecting piece passes through the insulating pad.

[0008] As a further solution of the present invention, activated carbon is arranged inside the metal barrel shell.

[0009] As a further solution of the present invention, an air intake control hole is opened in the middle of the insulating gasket.

[0010] As a further solution of the present invention, an internal air inlet hole is opened in the middle of the perforated negative electrode sheet.

[0011] As a further solution of the present invention, the internal air intake hole and the air intake control hole are coaxially arranged.

[0012] As a further solution of the present invention, an external air inlet hole is opened on one side of the upper side of the metal barrel shell.

[0013] As a further solution of the present invention, gas filter paper is provided on the upper inner wall of the metal barrel shell and above the internal air inlet hole.

[0014] The beneficial effects of the present invention are: a special reaction membrane is used to replace the water storage barrel, and a special activated carbon adsorption device is used to filter the interfering gas, so that the volume of the entire product is ultra-small, providing better space for the appearance design. Through the comprehensive design of this solution, the sensor process is simplified, the volume is reduced, the service life is extended, and it can be applied to more industrial designs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0016] Figure 1 is a schematic diagram of the overall structure of a carbon monoxide sensor according to an embodiment of the present invention; Figure 2 Schematic diagram of an explosion of a carbon monoxide sensor according to an embodiment of the present invention.

[0017] In the figure: 1. Metal barrel shell; 2. Activated carbon; 3. Perforated negative electrode sheet; 4. Air intake control board; 5. Insulating gasket; 6. Sealing gasket; 7. Small gas diffusion layer; 8. Electrolytic membrane; 9. Large gas diffusion layer; 10. Positive electrode sheet; 11. Positive electrode connecting sheet; 12. Insulating gasket; 13. Negative electrode connecting sheet; 14. Internal air intake hole; 15. Air intake control hole; 16. External air intake hole; 17. Gas filter paper. DETAILED DESCRIPTION

[0018] To further illustrate each embodiment, the present invention provides drawings, which are part of the disclosure of the present invention and are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, ordinary technicians in the field should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0019] According to an embodiment of the present invention, a carbon monoxide sensor is provided.

[0020] Please refer to the instruction manual Figure 1-2 The carbon monoxide sensor according to the embodiment of the present invention comprises a metal barrel shell 1, a negative electrode connecting piece 13 is arranged at the bottom of the metal barrel shell 1, an insulating pad 12 is arranged above the negative electrode connecting piece 13, a positive electrode sheet 10 is arranged above the insulating pad 12, a positive electrode connecting piece 11 is fixed to the bottom of one side of the positive electrode sheet 10, a large gas diffusion layer 9 is arranged above the positive electrode sheet 10, an electrolytic membrane 8 is arranged above the large gas diffusion layer 9, a small gas diffusion layer 7 is arranged above the electrolytic membrane 8, a sealing pad 6 is arranged on the positive electrode sheet 10, and an insulating pad 5 is arranged above the sealing pad 6. An air intake control plate 4 is arranged above the insulating gasket 5, a perforated negative electrode sheet 3 is arranged above the air intake control plate 4, the positive electrode connecting plate 11 passes through the insulating gasket 12, activated carbon 2 is arranged inside the metal barrel shell 1, an air intake control hole 15 is opened in the middle position of the insulating gasket 5, an internal air intake hole 14 is opened in the middle position of the perforated negative electrode sheet 3, the internal air intake hole 14 and the air intake control hole 15 are coaxially arranged, an external air intake hole 16 is opened on the upper side of the metal barrel shell 1, and gas filter paper 17 is arranged on the upper inner wall of the metal barrel shell 1 and above the internal air intake hole 14.

[0021] A special reaction membrane replaces the water storage barrel, and a special activated carbon adsorption device is used to filter the interfering gas, making the volume of the entire product ultra-small, providing better space for the appearance design. Through the comprehensive design of this solution, the sensor process is simplified, the volume is reduced, the service life is extended, and it can be applied to more industrial designs.

[0022] When in use, CO+H2O→CO2+2H++2e- 1 / 2O2+2H++2e-→H2O The electrolytic membrane 8 has the function of absorbing water in the air. When there is carbon monoxide gas outside, carbon dioxide, 2H+ ions and 2e- are generated under the action of the catalyst of the electrolytic membrane 8, thereby generating an electric current. The magnitude of the current can be detected by the external circuit, and the magnitude of the current can be converted into the magnitude of the CO concentration. In addition, the electrolytic membrane 8 also has the function of synthesizing water. O2, H+ and e- can generate a part of water, which plays a role in replenishing a part of the water and making it more stable in a dry environment.

[0023] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A carbon monoxide sensor, comprising a metal barrel (1), activated carbon (2), a porous negative electrode sheet (3), an air intake 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: A negative electrode connecting sheet (13) is arranged at the bottom of the metal barrel shell (1), an insulating pad (12) is arranged above the negative electrode connecting sheet (13), a positive electrode sheet (10) is arranged above the insulating pad (12), a positive electrode connecting sheet (11) is fixed to the bottom of one side of the positive electrode sheet (10), a large gas diffusion layer (9) is arranged above the positive electrode sheet (10), an electrolytic membrane (8) is arranged above the large gas diffusion layer (9), a small gas diffusion layer (7) is arranged above the electrolytic membrane (8), a sealing pad (6) is arranged on the positive electrode sheet (10), an insulating pad (5) is arranged above the sealing pad (6), an air intake control plate (4) is arranged above the insulating pad (5), and a perforated negative electrode sheet (3) is arranged above the air intake control plate (4).

2. The carbon monoxide sensor according to claim 1, characterized in that: The positive electrode connecting sheet (11) passes through the insulating pad (12).

3. The carbon monoxide sensor according to claim 1, characterized in that: Activated carbon (2) is arranged inside the metal barrel shell (1).

4. The carbon monoxide sensor according to claim 1, characterized in that: An air intake control hole (15) is provided in the middle of the insulating gasket (5).

5. The carbon monoxide sensor according to claim 4, characterized in that: An internal air inlet hole (14) is provided in the middle of the perforated negative electrode sheet (3).

6. The carbon monoxide sensor according to claim 5, characterized in that: The internal air intake hole (14) and the air intake control hole (15) are coaxially arranged.

7. The carbon monoxide sensor according to claim 1, characterized in that: An external air inlet hole (16) is provided on one side of the upper side of the metal barrel shell (1).

8. The carbon monoxide sensor according to claim 5, characterized in that: Gas filter paper (17) is provided on the upper inner wall of the metal barrel shell (1) and above the internal air inlet hole (14).

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