CN217084786U

CN217084786U - Three-electrode electrochemical chlorine sensor

Info

Publication number: CN217084786U
Application number: CN202220656413.5U
Authority: CN
Inventors: 梅源; 马俊平; 张东旭
Original assignee: Nanjing Yiqiao Technology Co ltd
Current assignee: Nanjing Yiqiao Technology Co ltd
Priority date: 2022-03-22
Filing date: 2022-03-22
Publication date: 2022-07-29
Anticipated expiration: 2032-03-22

Abstract

The utility model provides a three electrode electrochemistry chlorine sensor, which comprises a housin, the working electrode layer, the reference electrode layer, the counter electrode layer, the inlet port, a serial communication port, be equipped with the reservoir chamber in the casing, be equipped with the liquid retention material piece in the reservoir chamber, the reservoir chamber outside is equipped with porous baffle, the working electrode layer, the reference electrode layer, the counter electrode layer, porous baffle and reservoir chamber set gradually from last to down, the imbibition hole has been seted up at the top of reservoir chamber, electrolyte in the reservoir chamber passes through imbibition hole and working electrode layer, the reference electrode layer, the counter electrode layer contacts. The sensor can solve the problem that electrolyte leaks due to the fact that the electrolyte absorbs a large amount of water vapor in the air.

Description

Three-electrode electrochemical chlorine sensor

Technical Field

The utility model relates to an electrochemical sensor field, concretely relates to three electrode electrochemistry chlorine sensor.

Background

An electrochemical gas sensor measures by oxidation or reduction reaction with a gas to be measured and generating an electrical signal proportional to the gas concentration. The typical three-electrode structure consists of a detection electrode (or working electrode), a reference electrode and a counter electrode, and each electrode layer is completely contacted with an electrolyte solution. The electrochemical gas sensor has the advantages of high sensitivity, rapid and accurate reaction, small volume, portability and the like, has important significance for life and property safety guarantee in production and life, and has wide application prospect.

The above-mentioned conventional three-electrode electrochemical gas sensors generally use a strongly acidic sulfuric acid or phosphoric acid aqueous solution as an electrolyte, such as electrochemical Cl ₂ 、CO、SO ₂ 、H ₂ The S sensor and the like are all high-concentration sulfuric acid electrolyte, the sensor continuously absorbs water vapor in air during use, the volume of the electrolyte is continuously increased, and the electrolyte finally leaks out from an air inlet, and the strong-acid electrolyte leaks out, so that the sensor fails, and meanwhile, the strong corrosivity of the sensor threatens the personal safety of a user.

Disclosure of Invention

For overcoming the defects of the prior art, the utility model provides a three-electrode electrochemical chlorine sensor for solve the problem of electrolyte seepage due to a large amount of water vapor in the absorbed air.

In order to realize the above-mentioned purpose, the utility model discloses a three electrode electrochemistry chlorine sensor, which comprises a housin, the working electrode layer, reference electrode layer, counter electrode layer, the inlet port, be equipped with the reservoir chamber in the casing, be equipped with the liquid retention material piece in the reservoir chamber, the reservoir chamber outside is equipped with porous partition plate, reference electrode layer, counter electrode layer, porous partition plate and reservoir chamber set gradually from last to down, the imbibition hole has been seted up at the top of reservoir chamber, electrolyte in the reservoir chamber passes through imbibition hole and working electrode layer, reference electrode layer, counter electrode layer contact.

Further, the vertical section of the liquid storage tank chamber is in the shape of an inverted cup.

Furthermore, the liquid suction hole is in a circular hole shape, and the diameter of the liquid suction groove is 4 mm.

Furthermore, a first liquid absorption cotton and a second liquid absorption cotton are arranged in the shell and are respectively positioned on the upper side and the lower side of the reference electrode layer.

Furthermore, a circular groove with the diameter of 6mm is arranged at the central position of the counter electrode layer.

Further, the diameter of the air inlet hole is 8 mm.

Further, the width of the first liquid absorption cotton and the width of the second liquid absorption cotton are the same as the inner width of the shell.

Has the advantages that: this sensor adopts back-off cup type reservoir chamber, can slowly get into porous partition plate upper portion space with inside electrolyte through central imbibition hole, has realized that electrochemical chlorine sensor takes place the reaction and needs how much electrolyte just follow the effect of how much electrolyte of cup type reservoir suction, can avoid strong acid electrolyte constantly to absorb moisture the back volume increase to lead to the electrolyte seepage problem effectively.

Drawings

The invention will be further described and illustrated with reference to the accompanying drawings.

Fig. 1 is an overall schematic structural view of a preferred embodiment of the present invention.

Reference numerals: 1-1, a shell; 1-2, a cover; 2. an air inlet; 3. an O-shaped ring; 4. a working electrode layer; 5. first liquid absorption cotton; 6. a reference electrode layer; 7. second liquid absorption cotton; 8. a counter electrode layer; 9. a porous separator; 10. a cup-shaped reservoir; 11. and (4) a liquid retention material.

Detailed Description

The technical solution of the present invention will be more clearly and completely explained by the description of the preferred embodiments of the present invention with reference to the accompanying drawings.

As shown in fig. 1, the three-electrode electrochemical chlorine sensor according to the preferred embodiment of the present invention comprises a housing 1-1, a cover 1-2, an air inlet 2, an O-ring 3, a working electrode layer 4, a first liquid-absorbing cotton 5, a reference electrode layer 6, a second liquid-absorbing cotton 7, a counter electrode layer 8, a porous partition 9, and a reservoir chamber.

The O-shaped ring 3, the working electrode layer 4, the first liquid absorption cotton 5, the reference electrode layer 6, the second liquid absorption cotton 7, the counter electrode layer 8, the porous partition plate 9 and the liquid storage tank chamber are sequentially arranged from top to bottom. After the cover is covered on the shell, the O-shaped ring 3, the working electrode layer 4, the first liquid absorption cotton 5, the reference electrode layer 6, the second liquid absorption cotton 7, the counter electrode layer 8, the porous partition plate 9 and the liquid storage tank chamber are mutually compressed. The three-electrode electrochemical chlorine sensor is simple in structure, and after all elements are compressed, the sensor can be prevented from falling and vibrating in the using process to enable internal elements to be displaced, so that the sensor fails.

The longitudinal section of the liquid storage tank chamber adopts a special inverted cup shape, the top of the liquid storage tank chamber is provided with a 4mm liquid suction hole, 11 liquid retention materials are arranged in the liquid storage tank chamber, and the 11 liquid retention materials are fully soaked by the electrolyte. When the sensor works, the electrolyte in the liquid storage tank chamber is slowly sucked out from the liquid suction hole and is in contact with the working electrode layer 4, the reference electrode layer 6 and the counter electrode layer 8. The effect of sucking out electrolyte from the cup-shaped liquid storage tank by the amount of electrolyte required by the electrochemical chlorine sensor to react is realized, and the problem of electrolyte leakage caused by volume increase after the strong acid electrolyte continuously absorbs moisture can be effectively avoided.

The working electrode layer 4, the reference electrode layer 6 and the counter electrode layer 8 are all made of ePTFE membrane materials, and a circular groove with the diameter of 6mm is arranged at the center of the counter electrode layer 8. The air inlet 2 adopts an inlet hole with the diameter of 8 mm. The O-shaped ring 3 is made of fluorine-containing material.

The width of the first liquid absorption cotton 5 and the second liquid absorption cotton 7 is the same as the width of the inner part of the shell, and the electrolyte coming out of the liquid absorption holes is absorbed.

The above detailed description merely describes the preferred embodiments of the present invention and does not limit the scope of the present invention. Without departing from the design concept and spirit scope of the present invention, the ordinary skilled in the art should belong to the protection scope of the present invention according to the present invention provides the text description and drawings to the various modifications, replacements and improvements made by the technical solution of the present invention. The scope of protection of the present invention is determined by the claims.

Claims

1. The utility model provides a three electrode electrochemistry chlorine sensor, includes casing, working electrode layer, reference electrode layer, counter electrode layer, inlet port, its characterized in that, be equipped with the reservoir chamber in the casing, be equipped with the liquid retention material piece in the reservoir chamber, the reservoir chamber outside is equipped with porous partition plate, working electrode layer, reference electrode layer, counter electrode layer, porous partition plate and reservoir chamber set gradually from last to down, the imbibition hole has been seted up at the top of reservoir chamber, electrolyte in the reservoir chamber passes through the imbibition hole and contacts with working electrode layer, reference electrode layer, counter electrode layer.

2. The three-electrode electrochemical chlorine sensor of claim 1, wherein the reservoir chamber has a vertical cross-sectional shape that is an inverted cup.

3. A three-electrode electrochemical chlorine sensor according to claim 2, wherein said pick-up holes are circular holes having a diameter of 4 mm.

4. A three-electrode electrochemical chlorine sensor according to claim 1, wherein the housing contains first and second wicking cotton layers on the top and bottom sides of the reference electrode layer, respectively.

5. A three-electrode electrochemical chlorine sensor according to claim 1, wherein the counter electrode layer is provided with a circular groove having a diameter of 6mm at the center thereof.

6. A three-electrode electrochemical chlorine sensor as claimed in claim 1, wherein the diameter of the air inlet hole is 8 mm.

7. A three-electrode electrochemical chlorine sensor according to claim 4, wherein the first and second wicks have the same width as the interior width of the housing.