CN211978742U

CN211978742U - Direct-heating type gas sensor

Info

Publication number: CN211978742U
Application number: CN202020620567.XU
Authority: CN
Inventors: 陈立强; 刘若水; 张树金
Original assignee: Zhengzhou Meike Shengshi Electronic Technology Co ltd
Current assignee: Zhengzhou Meike Shengshi Electronic Technology Co ltd
Priority date: 2020-04-22
Filing date: 2020-04-22
Publication date: 2020-11-20
Anticipated expiration: 2030-04-22

Abstract

The utility model provides a directly-heated gas sensor, including base, casing, the base bottom is provided with the electrode, and the base top is worn to appear at the top of electrode, still includes first wire, second wire and gas-sensitive detection body, the one end setting of first wire is at the top of first electrode, the other end of first wire is around being equipped with first loop type portion, the middle part of second wire is around being equipped with second loop type portion, the one end setting of second wire is at the top of second electrode, the other end of second wire is worn to establish set up in the top of third electrode behind in the first loop type portion, and first loop type portion and second loop type portion overlap the setting, and the gas-sensitive detection body sets up in first loop type portion and second loop type portion. The directly-heated gas sensor has the advantages of good heating performance and low power consumption.

Description

Direct-heating type gas sensor

Technical Field

The utility model relates to a directly-heated gas sensor.

Background

An Electrochemical gas sensor (Electrochemical gas sensor) is a detector that measures a current by oxidizing or reducing a gas to be measured at an electrode, and obtains a concentration of the gas to be measured. The sensor body is generally provided with a gas-sensitive detection body, the gas-sensitive detection body is generally a ceramic tube coated with a gas-sensitive material of a target gas, the gas-sensitive material is used for reacting with the target gas, electrodes are generally connected to the gas-sensitive detection body through thin metal wires such as platinum wires, and when the gas-sensitive detection body reacts with the target gas, the current between the electrodes changes. The existing electrochemical sensor ceramic tube is generally provided with a heating wire in a penetrating way, and the heating wire is used for heating the ceramic tube after being electrified, so that the gas sensitive material works at a proper temperature, and the detection accuracy is improved. However, since the ceramic tube is tubular, the heating wire is arranged in the tube in a penetrating manner, the contact area with the ceramic tube is very small, the heat transfer efficiency is low, and the power consumption is high.

Disclosure of Invention

In order to solve the problems existing in the background art, the utility model provides a directly-heated gas sensor.

The utility model provides a directly-heated gas sensor, includes base, casing, the base bottom is provided with the electrode, and the base top is worn to establish at the top of electrode, still includes first wire, second wire and gas-sensitive detection body, the one end setting of first wire is at the top of first electrode, the other end of first wire is around being equipped with first ring type portion, the middle part of second wire is around being equipped with second ring type portion, the one end setting of second wire is at the top of second electrode, the other end of second wire is worn to establish set up at the top of third electrode behind in the first ring type portion, and first ring type portion and second ring type portion overlap and set up, and the gas-sensitive detection body sets up on first ring type portion and second ring type portion.

Based on the above, the first lead and the second lead are platinum wires, respectively.

Based on the above, the diameter of the first wire is 0.02mm, and the diameter of the second wire is 0.03 mm.

Based on the above, the second annular part is a plurality of turns of annular parts with different diameters.

The utility model discloses relative prior art has substantive characteristics and progress, specific theory, the utility model discloses a set up loop type portion respectively on first wire and second wire, first wire and second wire are connected through first loop type portion, play the effect of strengthening the fastness to set up the gas sensitive detection body in first loop type portion and second loop type portion, increased the area of contact of gas sensitive detection body and wire, play the effect that the heating is effectual, firm in connection.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic diagram of the internal structure of the present invention.

Fig. 2 is a schematic structural diagram of the first lead and the second lead (not passing through the lead) according to the present invention.

Fig. 3 is a schematic view of the overall structure of the present invention.

In the figure: 1. a base; 2. a housing; 3. an electrode; 4. an air inlet; 5. a first conductive line; 6. a second conductive line; 7. a gas-sensitive detection body; 8. a first annular portion; 9. a second annular portion.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without any creative effort belong to the protection scope of the present invention.

As shown in fig. 1, 2 and 3, a directly-heated gas sensor includes a base 1 and a housing 2, an electrode 3 is disposed at the bottom of the base 1, the top of the electrode 3 penetrates through the top of the base 1, and the directly-heated gas sensor further includes a first wire 5, a second wire 6 and a gas sensing detector 7, one end of the first wire 5 is disposed at the top of the first electrode, the other end of the first wire 5 is wound with a first annular portion 8, the middle of the second wire 6 is wound with a second annular portion 9, one end of the second wire 6 is disposed at the top of the second electrode, the other end of the second wire 6 penetrates through the first annular portion 8 and is disposed at the top of the third electrode, the first annular portion 8 and the second annular portion 9 are overlapped, and the gas sensing detector 7 is disposed on the first annular portion 8 and the second annular portion 9.

In practice, an air inlet 4 is provided at the top of the housing 2, and after the gas enters the housing 2, the target detection gas reacts with the gas sensitive material on the gas sensitive detection body 7. During actual production, after the first annular part 8 and the second annular part 9 are overlapped, the gas-sensitive material is coated on the first annular part 8 and the second annular part 9 and is sintered on the first annular part 8 and the second annular part 9 at high temperature, so that the contact area of the first lead 5 and the second lead 6 with the gas-sensitive detection body 7 is increased, the heating efficiency is effectively improved due to sufficient contact and contact area, and the power consumption is reduced. Meanwhile, the second lead 6 is connected with the first lead 5 in a penetrating mode, the contact area of the second lead and the gas-sensitive detection body 7 is increased, connection firmness is improved, and the risk that the first lead 5 is separated from the gas-sensitive detection body 7 during vibration is avoided. The gas-sensitive detection body 7 is actually in the shape of a cake.

Preferably, the second annular portion 9 is a plurality of annular portions with different diameters, which further contributes to increase of the contact area with the gas-sensitive detection body 7.

In this embodiment, the first lead 5 and the second lead 6 are platinum wires, respectively. Specifically, the diameter of the first conducting wire 5 is 0.02mm, the first conducting wire 5 plays a role in detection, the diameter of the second conducting wire 6 is 0.03mm, and the second conducting wire 6 plays a role in heating.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Claims

1. The utility model provides a directly-heated type gas sensor, includes base, casing, the base bottom is provided with the electrode, and the base top is worn to establish at the top of electrode, its characterized in that: still include first wire, second wire and gas sensitive detection body, the one end setting of first wire is at the top of first electrode, the other end of first wire is around being equipped with first ring type portion, the middle part of second wire is around being equipped with second ring type portion, the one end setting of second wire is at the top of second electrode, the other end of second wire is worn to establish set up at the top of third electrode behind in the first ring type portion, and first ring type portion and second ring type portion overlap and set up, and gas sensitive detection body sets up on first ring type portion and second ring type portion.

2. The direct-heated gas sensor according to claim 1, characterized in that: the first lead and the second lead are platinum wires respectively.

3. The direct-heated gas sensor according to claim 1, characterized in that: the diameter of the first conducting wire is 0.02mm, and the diameter of the second conducting wire is 0.03 mm.

4. The direct-heated gas sensor according to claim 1, characterized in that: the second annular parts are respectively a plurality of circles of annular parts with different diameters.