CN201225994Y

CN201225994Y - Carbon monoxide sensor

Info

Publication number: CN201225994Y
Application number: CNU2008200503725U
Authority: CN
Inventors: 金贵华
Original assignee: Individual
Current assignee: Individual
Priority date: 2008-07-08
Filing date: 2008-07-08
Publication date: 2009-04-22
Anticipated expiration: 2018-07-08

Abstract

The utility model relates to the technical field of sensor, in particular to a CO sensor which includes a filter, an upper electrode plate, a sensor chip, a lower electrode plate, a liquid chamber, a shell, an upper electrode pin and a lower electrode pin; the upper end surface and the lower end surface of the sensor chip are respectively contacted with the upper electrode plate and the lower electrode plate; a ventilating hole is arranged on the upper electrode plate; the filter, the upper electrode plate, the sensor chip and the lower electrode plate are arranged inside the shell from up to down; the liquid chamber is arranged at the bottom part of the shell; the top part of the shell is provided with an air inlet hole; one end of the upper electrode pin is connected with the upper electrode plate and the other end penetrates the bottom part of the shell; one end of the lower electrode pin is connected with the lower electrode plate and the other end penetrates the bottom part of the shell. In the utility model, each part is arranged inside the shell from up to down in turn, is simply assembled, is high in efficiency, is low in production cost, can effectively protect the parts inside the shell from being disturbed by the outside environments, has a larger output current and has a good induction performance.

Description

Carbon monoxide transducer

Technical field:

The utility model relates to sensor technical field, particularly carbon monoxide transducer.

Background technology:

Carbon monoxide is a kind of colourless, tasteless, hypertoxic gas, it can destroy the oxygen delivery capacity of human body, when it is assembled in blood of human body and reaches certain concentration, will make that the people produces dizzy, headache, feels sick, toxicity symptoms such as vomiting, drowsiness, stupor, serious caused neurotrosis becomes plant person or death, thereby designs a kind of carbon monoxide transducer with premium properties and have great significance.

Existing carbon monoxide transducer includes liquid chamber and the filtrator that is fixed on the liquid chamber; pole piece powers on; be coated with the sensor chip of catalyzer; the bottom electrode sheet; the upper and lower end face of sensor chip contacts with the bottom electrode sheet with the pole piece that powers on respectively; power on and offer the bleeder vent corresponding on the pole piece with sensor chip; power on pole piece and bottom electrode sheet leads to the electrode shell fragment in a side respectively; when sensor chip is sensed carbon monoxide; will produce electric current; just can detect the concentration of carbon monoxide by the electric current of measuring two electrode shell fragments; but this carbon monoxide transducer does not have shell that each part is protected; structural design is unreasonable; the assembling process complexity; efficient is low; the production cost height, output current is less, and sensitivity is poor.

The utility model content:

The purpose of this utility model is to provide a kind of shell that utilizes that each part is protected, assembles simple carbon monoxide transducer at the deficiencies in the prior art.

For achieving the above object, the utility model adopts following technical scheme:

Carbon monoxide transducer, it includes filtrator, pole piece powers on, be coated with the sensor chip of catalyzer, the bottom electrode sheet, liquid chamber, the upper and lower end face of sensor chip contacts with the bottom electrode sheet with the pole piece that powers on respectively, power on and offer the bleeder vent corresponding on the pole piece with sensor chip, it also includes shell, top electrode pin and bottom electrode pin, filtrator, pole piece powers on, sensor chip and bottom electrode sheet are arranged on the inside of shell from top to bottom, liquid chamber is located at the bottom of shell, the top of shell offers the air admission hole corresponding with filtrator, one end of top electrode pin is connected with the pole piece that powers on, the other end passes the bottom of shell, one end of bottom electrode pin is connected with the bottom electrode sheet, the other end passes the bottom of shell, and liquid chamber is communicated with the passage that leads to sensor chip.

Described sensor chip and power on and be provided with O-ring seal between the pole piece.

Described sensor chip, O-ring seal and the tight contact matching between the pole piece that powers on.

Described filtrator is an activated carbon fiber.

Described bottom electrode sheet is fastened on enclosure, seals by the O RunddichtringO between bottom electrode sheet and the shell.

The described pole piece that powers on is fixed on enclosure.

The top card of described shell is provided with loam cake, and air admission hole is opened in and covers.

The utility model beneficial effect is: the utility model includes filtrator; pole piece powers on; be coated with the sensor chip of catalyzer; the bottom electrode sheet; liquid chamber; the upper and lower end face of sensor chip contacts with the bottom electrode sheet with the pole piece that powers on respectively; power on and offer the bleeder vent corresponding on the pole piece with sensor chip; it also includes shell; top electrode pin and bottom electrode pin; filtrator; pole piece powers on; sensor chip and bottom electrode sheet are arranged on the inside of shell from top to bottom; liquid chamber is located at the bottom of shell; the top of shell offers the air admission hole corresponding with filtrator; one end of top electrode pin is connected with the pole piece that powers on; the other end passes the bottom of shell; one end of bottom electrode pin is connected with the bottom electrode sheet; the other end passes the bottom of shell; liquid chamber is communicated with the passage that leads to sensor chip; each part of the present utility model is arranged on enclosure successively from top to bottom; assembling is simple; the efficient height; production cost is low; effectively the part of protecting sheathing inside is not subjected to the interference of external environment condition; output current is bigger, and sensitivity is good.

Description of drawings:

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is a cut-open view of the present utility model;

Fig. 3 is a decomposing schematic representation of the present utility model;

Fig. 4 is the structural representation that the utility model conceals shell.

Embodiment:

Below in conjunction with accompanying drawing the utility model is further described, see Fig. 1-4, carbon monoxide transducer, it includes filtrator 2, pole piece 3 powers on, be coated with the sensor chip 4 of catalyzer, bottom electrode sheet 5, liquid chamber 6, sensor chip 4 is a kind of membrane modules based on electrochemical principle, include a layer proton exchange membrane and two carbon papers that are coated with the metallic catalyst of certain carrying capacity, it overlays two carbon papers on the two sides of PEM respectively under certain pressure and temperature and forms, its function is to produce chemical reaction at two electrodes, and can allow positive ion pass through, and gas can not pass through.The upper and lower end face of sensor chip 4 closely contacts with bottom electrode sheet 5 with the pole piece 3 that powers on respectively, power on and offer the bleeder vent 31 corresponding on the pole piece 3 with sensor chip 4, it also includes shell 1, top electrode pin 7 and bottom electrode pin 8, filtrator 2, the pole piece 3 that powers on, sensor chip 4 and bottom electrode sheet 5 are arranged on the inside of shell 1 from top to bottom, the bottom of shell 1 is a cavity structure, its cavity is a liquid chamber 6, and liquid chamber 6 is structure as a whole with shell 1, and is easy to process.The top card of shell 1 is provided with loam cake 10, offer the air admission hole 11 corresponding on the loam cake 10 with filtrator 2, one end of top electrode pin 7 is connected with the pole piece 3 that powers on, the other end passes the bottom of shell 1, one end of bottom electrode pin 8 is connected with bottom electrode sheet 5, the other end passes the bottom of shell 1, and top electrode pin 7 and bottom electrode pin 8 are current output terminal, convenient for assembly and measurement.Liquid chamber 6 is communicated with the passage 12 that leads to sensor chip 4, and liquid chamber 6 provides electrochemical reaction required water by passage 12 for sensor chip 4.Bottom electrode sheet 5 is fastened on shell 1 inside, and by 13 sealings of O RunddichtringO, the pole piece 3 that powers on is fixed on shell 1 inside by screw, and is easy for installation between bottom electrode sheet 5 and the shell 1.

Sensor chip 4 and power on and be provided with O-ring seal 9 between the pole piece 3, sensor chip 4, O-ring seal 9 and the closely contact matching that powers between the pole piece 3 by screw locking, and reach sealing effectiveness.

Its middle filtrator 2 is an activated carbon fiber, and activated carbon fiber can effectively filter penetrating odor, avoids the interference of being upset property of sensor smell.

Each part of the present utility model is arranged on shell 1 inside successively from top to bottom, and assembling is simple, the efficient height, and production cost is low, and effectively the part of protecting sheathing 1 inside is not subjected to the interference of external environment condition, and output current is bigger, and sensitivity is good.

Design of the present utility model is a kind of combination of electrochemical pump, can be considered a miniature carbon monoxide-oxygen fuel battery, the pole piece 3 that powers on is that catalysis electrode directly is combined on sensor chip 4 surfaces, the carbon monoxide that enters from shell 1 top is in sensor chip 4 upper surface electrochemical reactions and oxidation produces positive ion, the positive ion that produces on sensor chip 4 is transformed in inside, cross sensor chip 4 and arrive bottom electrode sheet 5, constituted the course of work that is similar to battery, if two pins in outside are connected on the circuit, electronics just forms electric current by the external circuit, just can detect the concentration of carbon monoxide by this electric current.

The above only is a better embodiment of the present utility model, so all equivalences of doing according to the described structure of the utility model patent claim, feature and principle change or modify, is included in the utility model patent claim.

Claims

1, carbon monoxide transducer, it includes filtrator (2), pole piece (3) powers on, be coated with the sensor chip (4) of catalyzer, bottom electrode sheet (5), liquid chamber (6), the upper and lower end face of sensor chip (4) contacts with bottom electrode sheet (5) with the pole piece that powers on (3) respectively, power on and offer the bleeder vent (31) corresponding on the pole piece (3) with sensor chip (4), it is characterized in that: it also includes shell (1), top electrode pin (7) and bottom electrode pin (8), filtrator (2), pole piece (3) powers on, sensor chip (4) and bottom electrode sheet (5) are arranged on the inside of shell (1) from top to bottom, liquid chamber (6) is located at the bottom of shell (1), the top of shell (1) offers the air admission hole (11) corresponding with filtrator (2), one end of top electrode pin (7) is connected with the pole piece that powers on (3), the other end passes the bottom of shell (1), one end of bottom electrode pin (8) is connected with bottom electrode sheet (5), the other end passes the bottom of shell (1), and liquid chamber (6) is communicated with the passage (12) that leads to sensor chip (4).

2, carbon monoxide transducer according to claim 1 is characterized in that: be provided with O-ring seal (9) between described sensor chip (4) and the pole piece that powers on (3).

3, carbon monoxide transducer according to claim 2 is characterized in that: tight contact matching between described sensor chip (4), O-ring seal (9) and the pole piece that powers on (3).

4, carbon monoxide transducer according to claim 1 is characterized in that: described filtrator (2) is an activated carbon fiber.

5, carbon monoxide transducer according to claim 1 is characterized in that: described bottom electrode sheet (5) is fastened on shell (1) inside, seals by O RunddichtringO (13) between bottom electrode sheet (5) and the shell (1).

6, carbon monoxide transducer according to claim 1 is characterized in that: the described pole piece that powers on (3) is fixed on shell (1) inside.

7, according to any described carbon monoxide transducer of claim 1-6, it is characterized in that: the top card of described shell (1) is provided with loam cake (10), and air admission hole (11) is opened on the loam cake (10).