CN215066319U

CN215066319U - Superior air permeability oxygen sensor

Info

Publication number: CN215066319U
Application number: CN202121103966.XU
Authority: CN
Inventors: 赖源标
Original assignee: Guangzhou Meiruntao Thermal Electric Co ltd
Current assignee: Guangzhou Meiruntao Thermal Electric Co ltd
Priority date: 2021-05-21
Filing date: 2021-05-21
Publication date: 2021-12-07
Anticipated expiration: 2031-05-21

Abstract

The utility model provides a superior air permeability oxygen sensor belongs to the sensing equipment field. It includes sensor main part, back sleeve, fluorine rubber plug and fixed shim, the fixed shim includes ring substrate and stopper, the edge of ring substrate is provided with a plurality of hole grooves, and the middle part of this ring substrate is provided with the circular port, the stopper is fixed in on the edge of circular port, fluorine rubber plug with back sleeve's terminal fixed connection, the sensor main part pass through fixed shim with back sleeve fixed connection, be provided with the inlet port on the back sleeve. Compared with the prior art, the utility model discloses carry out the gas permeability to traditional solid fixed shim and improve, make solid fixed shim can maintain traditional spacing fixed action, can increase the air permeability between oxygen sensor main part and the back sleeve again.

Description

Superior air permeability oxygen sensor

Technical Field

The utility model belongs to the sensing equipment field particularly, relates to a superior air permeability oxygen sensor.

Background

Oxygen sensors are essential components on engines that use catalytic converters to reduce exhaust pollution. The theoretical optimal air-fuel ratio is 14.7:1, if the air-fuel ratio of the mixture deviates from the theoretical air-fuel ratio, the purification capacity of the three-way catalyst will be rapidly reduced, so an oxygen sensor for detecting the concentration of oxygen in the exhaust gas is arranged in the exhaust pipe, a feedback signal is sent to the central processing unit, and the central processing unit controls the increase and decrease of the oil injection quantity of the oil injector, so that the air-fuel ratio of the mixture is controlled to be close to the theoretical value.

The oxygen sensor is a standard configuration on the current automobile, and is a measuring element which utilizes a ceramic sensitive element to measure the oxygen potential in an automobile exhaust pipeline, calculates the corresponding oxygen concentration according to the chemical equilibrium principle, and achieves the purposes of monitoring and controlling the combustion air-fuel ratio so as to ensure the product quality and the exhaust emission to reach the standard. The basic working principle is as follows: under certain conditions, the difference of oxygen concentration between the inner side and the outer side of the zirconia is utilized to generate potential difference, and the larger the concentration difference is, the larger the potential difference is. The oxygen content in the atmosphere is about one fifth, the exhaust gas from the combustion of a rich mixture contains virtually no oxygen, and the exhaust gas from the combustion of a lean mixture or from a misfire contains more oxygen, but still much less oxygen than the atmosphere. Under the catalysis of platinum at high temperature, negatively charged oxygen ions are adsorbed on the inner and outer surfaces of the zirconia sleeve. Because the oxygen in the atmosphere is more than the oxygen in the waste gas, more negative ions are adsorbed on one side of the sleeve communicated with the atmosphere than on one side of the waste gas, and the concentration difference of the ions on the two sides generates electromotive force.

When the oxygen concentration on the exhaust gas side of the automobile casing is low, a high voltage is generated between the electrodes of the oxygen sensor, a high voltage signal is sent to a central processing unit of the automobile for amplification, the central processing unit regards the high voltage signal as a rich mixture and regards the low voltage signal as a lean mixture. The computer dilutes or enriches the mixture as close to the stoichiometric air-fuel ratio as possible based on the voltage signal from the oxygen sensor, which is therefore a key sensor for electronically controlled fuel metering.

The existing oxygen sensor is generally fixed with the rear sleeve by fixing gaskets when being assembled, and because the fixing gaskets are generally sealed, the space between the oxygen sensor main body and the rear sleeve is isolated by the fixing gaskets, airflow on two sides is not circulated, and the testing performance of the oxygen sensor is affected. In view of this, the utility model provides a superior air permeability oxygen sensor.

SUMMERY OF THE UTILITY MODEL

In order to solve the problem, the utility model provides a superior air permeability oxygen sensor, it carries out the gas permeability to traditional solid fixed shim and improves, makes solid fixed shim can maintain traditional spacing fixed action, can increase the air permeability between oxygen sensor main part and the back sleeve again.

The utility model discloses a following technical scheme realizes:

the utility model provides a superior grade air permeability oxygen sensor, includes sensor main part, back sleeve, fluorine plug and fixed shim, fixed shim includes ring substrate and stopper, the edge of ring substrate is provided with a plurality of hole grooves, and the middle part of this ring substrate is provided with the circular port, the stopper is fixed in on the edge of circular port, the fluorine plug with back sleeve's terminal fixed connection, the sensor main part pass through fixed shim with back sleeve fixed connection, be provided with the inlet port on the back sleeve.

As a preferred technical scheme, the sensor main body comprises a base, a chip, ceramic and a wire end ceramic, wherein the chip and the ceramic are fixedly connected with the wire end ceramic, the chip is arranged in the ceramic, the inner side of the base is embedded and fixed with the ceramic, the outer side of the base is inserted and fixed with the rear sleeve, and the wire end ceramic is embedded into the circular hole of the ring substrate and is abutted against the inner part of the rear sleeve through the ring substrate.

As a preferable technical scheme, the wire end ceramic is further connected with a wire, the fluorine rubber plug is provided with a wire hole, and the wire extends out of the rear sleeve through the wire hole.

As a preferable technical solution, the ceramic includes a front ceramic and a rear ceramic, and a compact is disposed between the front ceramic and the rear ceramic.

As a preferable technical scheme, a waterproof breathable film for waterproof and breathable is further arranged in the rear sleeve.

As a preferred technical solution, the surface of the rear sleeve is further provided with an embossing.

As a preferable technical scheme, a red copper pad is further arranged between the front ceramic and the base.

As a preferable technical scheme, a protective inner cover for protecting the chip is further fixed on the base.

As a preferable technical scheme, a layer of protective outer cover is fixed on the outer side of the protective inner cover.

As a preferable technical scheme, the protective outer cover and the protective inner cover are both provided with air inlets.

Has the advantages that:

the utility model discloses an effect in a plurality of hole grooves that set up in the fixed shim, can be with the space intercommunication between back sleeve and the sensor main part, avoid traditional fixed shim to keep apart the space at line terminal pottery both ends, density inconsistency can not appear because keep apart in the space between back sleeve and the sensor main part, under the effect in ring substrate hole groove, can play the fixed action, the air that can make fixed shim one end again enters into the other end, make the space intercommunication between back sleeve and the sensor main part can communicate, realize carrying out the gas permeability improvement to traditional fixed shim with this, make fixed shim can maintain traditional spacing fixed action, can increase the gas permeability between oxygen sensor main part and the back sleeve again, with this messenger the utility model discloses it is more stable in the use.

Drawings

FIG. 1 is a schematic diagram of a superior air permeability oxygen sensor;

FIG. 2 is a perspective view of the mounting pad of FIG. 1;

FIG. 3 is an enlarged view of the structure of the superior air permeability oxygen sensor at the location of the fixation pad.

The attached drawings are as follows:

100. a sensor body; 11. an air inlet; 101. a base; 102. a chip; 103. a ceramic; 104. end terminal ceramic; 105. a wire; 106. a front ceramic; 107. a rear ceramic; 108. powder cakes; 109. a red copper pad; 200. a rear sleeve; 201. a waterproof breathable film; 202. stamping; 300. a fluorine rubber plug; 301. a wire guide hole; 400. fixing a gasket; 401. a ring substrate; 402. a hole groove; 403. a circular hole; 404. a limiting block; 500. a protective inner cover; 600. and (4) protecting the outer cover.

Detailed Description

For further disclosure and explanation of the technical solution of the present invention, a superior air permeability oxygen sensor is clearly and completely explained with reference to the accompanying drawings.

It should be noted that the terms "upper", "inner", "middle", "left", "right" and "one" used in the present specification are for convenience of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the corresponding elements may be changed or adjusted without substantial technical changes, and the scope of the present invention may be considered to be the scope of the present invention.

Referring to fig. 1 to 3, the utility model provides a superior air permeability oxygen sensor, including sensor main part 100, back sleeve 200, fluorine rubber plug 300 and fixed shim 400, fixed shim 400 includes ring substrate 401 and stopper 404, the edge of ring substrate 401 is provided with a plurality of hole grooves 402, and the middle part of this ring substrate 401 is provided with circular port 403, stopper 404 is fixed in on the edge of circular port 403, fluorine rubber plug 300 with the terminal fixed connection of back sleeve 200, sensor main part 100 through fixed shim 400 with back sleeve 200 fixed connection, be provided with inlet port 11 on the back sleeve 200.

The utility model discloses an effect of a plurality of hole grooves 402 that set up in fixed shim 400, can be with the space intercommunication between rear sleeve 200 and the sensor main part 100, avoid traditional fixed shim 400 to keep apart the space at line terminal pottery 104 both ends, density inconsistency can not appear because keep apart in the space between rear sleeve 200 and the sensor main part 100, under the effect of ring base piece 401 hole groove 402, can play the fixed action, the air admission that enables fixed shim 400 one end again can the other end, make the space intercommunication between rear sleeve 200 and the sensor main part 100 can communicate, realize carrying out the gas permeability improvement to traditional fixed shim 400 with this, make fixed shim 400 can maintain traditional spacing fixed action, can increase the gas permeability between oxygen sensor main part 100 and the rear sleeve 200 again, with this messenger the utility model discloses it is more stable in the use.

Specifically, the sensor body 100 includes a base 101, a chip 102, a ceramic 103, and a wire end ceramic 104, where the chip 102 and the ceramic 103 are both fixedly connected to the wire end ceramic 104, the chip 102 is disposed in the ceramic 103, the inner side of the base 101 is fixedly embedded in the ceramic 103, the outer side is fixedly inserted in the rear sleeve 200, the wire end ceramic 104 is embedded in the circular hole 403 of the ring substrate 401 and abuts against the inside of the rear sleeve 200 through the ring substrate 401, and it should be noted that the chip 102 is an oxygen sensor.

Specifically, the wire end ceramic 104 is further connected with a wire 105, the fluorine rubber plug 300 is provided with a wire hole 301, and the wire 105 extends out of the rear sleeve 200 through the wire hole 301.

During operation, connect the electricity through wire 105, install it in automobile engine blast pipe department, carry out threaded connection through the screw on base 101, make it carry out fixed connection with automobile engine blast pipe department, when carrying out the operation, the high temperature is in the period through this supports sensor and chip 102 and contacts, under the catalysis of high temperature and platinum, will adhere to the oxygen consumption on chip 102 totally, make chip 102 produce voltage signal, voltage signal passes through tail wire 105, goes out voltage signal transmission, comes to carry out analysis and detection to tail gas.

Specifically, the ceramic includes a front ceramic 106 and a rear ceramic 107, a powder cake 108 is disposed between the front ceramic 106 and the rear ceramic 107, and the front ceramic 106, the rear ceramic 107 and the powder cake 108 are mainly used for separating the chip 102, and the chip 102 is separated by the ceramic, which is beneficial to preventing the chip 102 from being interfered by the external environment when the chip 102 is in operation.

Specifically, a waterproof breathable film 201 for water resistance and ventilation is further arranged in the rear sleeve 200, and the waterproof breathable film 201 is used for water resistance and ventilation of the oxygen sensor.

Specifically, the rear sleeve 200 is also provided with an imprint 202 on the surface thereof.

Specifically, a copper pad 109 is further disposed between the front ceramic 106 and the base 101.

Specifically, a protective inner cover 500 for protecting the chip 102 is further fixed on the base 101.

Specifically, a layer of protective outer cover 600 is further fixed on the outer side of the protective inner cover 500.

Specifically, the outer protective cover 600 and the inner protective cover 500 are provided with air inlet holes 11.

It should be noted that, through the effect of protection inner cover 500 and protection outer cover 600, can effectively protect the utility model discloses a chip 102 can guarantee simultaneously that tail gas gets into from inlet port 11.

The present invention is not limited to the above embodiment, and if various modifications or changes of the present invention do not depart from the spirit and scope of the present invention, the present invention also includes such modifications and changes if such modifications and changes fall within the scope of the claims and the equivalent technology of the present invention.

Claims

1. The utility model provides a superior grade air permeability oxygen sensor, includes sensor main part, back sleeve, fluorine plug and fixed gasket, its characterized in that, fixed gasket includes ring substrate and stopper, the edge of ring substrate is provided with a plurality of hole grooves, and the middle part of this ring substrate is provided with the circular port, the stopper is fixed in on the edge of circular port, the fluorine plug with back sleeve's terminal fixed connection, the sensor main part pass through fixed gasket with back sleeve fixed connection, be provided with the inlet port on the back sleeve.

2. The superior air permeability oxygen sensor of claim 1, wherein: the sensor main body comprises a base, a chip, ceramic and wire end ceramic, wherein the chip and the ceramic are fixedly connected with the wire end ceramic, the chip is arranged in the ceramic, the inner side of the base is fixedly embedded with the ceramic, the outer side of the base is fixedly inserted into the rear sleeve in an inserting mode, and the wire end ceramic is embedded into the circular hole of the ring substrate and is abutted against the inner portion of the rear sleeve through the ring substrate.

3. The superior air permeability oxygen sensor of claim 2, wherein: the line end ceramic is also connected with a wire, the fluorine rubber plug is provided with a wire hole, and the wire extends out of the rear sleeve through the wire hole.

4. The superior air permeability oxygen sensor of claim 2, wherein: the ceramic comprises a front ceramic and a rear ceramic, and a powder cake is arranged between the front ceramic and the rear ceramic.

5. The superior air permeability oxygen sensor of claim 1, wherein: and a waterproof breathable film for water resistance and ventilation is also arranged in the rear sleeve.

6. The superior air permeability oxygen sensor of claim 1, wherein: the surface of the rear sleeve is also provided with embossing.

7. The superior air permeability oxygen sensor of claim 4, wherein: and a red copper pad is also arranged between the front ceramic and the base.

8. The superior air permeability oxygen sensor of claim 2, wherein: and a protective inner cover for protecting the chip is fixed on the base.

9. The superior air permeability oxygen sensor of claim 8, wherein: and a layer of protective outer cover is fixed on the outer side of the protective inner cover.

10. The superior air permeability oxygen sensor of claim 9, wherein: the protection outer cover and the protection inner cover are both provided with air inlets.