Quick-response oxygen sensor

Abstract

The utility model discloses a quick-response oxygen sensor, and relates to the technical field of oxygen sensors. Tail gas is introduced into the positioning cylinder through the circulating hole in the base, when the oxygen concentration of the exhausted tail gas is different from that of air, oxygen molecules on the high-concentration side are adsorbed to the first electrode to enable the electrode to be positively charged, otherwise, the second electrode can be negatively charged, so that the oxygen sensor can normally work, and the service life of the oxygen sensor is prolonged. Under the cooperation of a fixed seat, a first electrode and a second electrode, a heating rod can perform heating work, that is, the interior of the upper end of a positioning barrel can be in a stable constant-temperature state, and that is, the device can quickly perform tail gas induction work; and the upper end of the insulating column is connected with the insulating pad, so that the current which is not insulated in the insulating pad can be insulated, that is, the situation of electric leakage can be effectively avoided under the cooperation of the insulating pad and the insulating column, and damage is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of oxygen sensors, and particularly relates to an oxygen sensor with rapid response. Background Art

[0002] On an engine using a three-way catalytic converter to reduce exhaust pollution, an oxygen sensor is an essential component. Since once the air-fuel ratio of the air-fuel mixture deviates from the stoichiometric air-fuel ratio, the purification ability of the three-way catalyst for CO, HC, and NOx will drop sharply. Therefore, an oxygen sensor is installed in the exhaust pipe to detect the concentration of oxygen in the exhaust gas and send a feedback signal to the ECU, and then the ECU controls the increase or decrease of the fuel injection volume of the fuel injector, so as to control the air-fuel ratio of the air-fuel mixture near the theoretical value.

[0003] The existing oxygen sensors have a long response time during operation, which is more likely to discharge tail gas into the atmosphere, thus polluting the environment. Moreover, the existing oxygen sensors are more likely to be damaged during the cold and heat alternation, greatly reducing the service life of the oxygen sensors, and can no longer meet the needs of people. For this reason, we propose an oxygen sensor with rapid response. Content of the Utility Model

[0004] The purpose of the utility model is to provide an oxygen sensor with rapid response to solve the problems mentioned in the above background art.

[0005] The utility model specifically adopts the following technical solutions to achieve the above purpose:

[0006] An oxygen sensor with rapid response, comprising:

[0007] A base;

[0008] A protective shell, detachably installed below the base;

[0009] An induction mechanism, arranged inside the protective shell. The induction mechanism includes a positioning cylinder detachably installed inside the protective shell, a fixed seat detachably installed inside the positioning cylinder, a heating rod installed at the center of the fixed seat, a first electrode and a second electrode detachably installed at the upper part inside the positioning cylinder, and an insulating pad detachably installed at the lower part inside the positioning cylinder;

[0010] An insulating column, installed at the center of the lower end of the positioning cylinder.

[0011] Furthermore, a plurality of circulation holes are evenly formed on the circumferential outer wall of the base.

[0012] Furthermore, a clamping block is installed at the lower end of the base, and a clamping groove is formed on the upper end surface of the protective shell, and the clamping block is seated in the clamping groove.

[0013] Further, the inner wall of the protective case is provided with internal threads, and the circumferential outer wall of the upper part of the positioning cylinder is provided with threaded connections, and the protective case and the positioning cylinder are threadedly connected.

[0014] Further, a plurality of through holes are evenly formed inside the fixed seat.

[0015] Further, connection blocks are installed on the outer side walls of the upper ends of the first electrode and the second electrode, a connection groove is formed at the upper end of the positioning cylinder, and the connection blocks are installed in the connection groove.

[0016] Further, the insulating pad is made of zirconia ceramics, and positioning blocks are installed at the upper ends of the insulating pads, and positioning grooves are formed at the lower end of the fixed seat, and the positioning blocks are inserted into the positioning grooves.

[0017] The beneficial effects of the present utility model are as follows:

[0018] 1. The tail gas of the present utility model is introduced into the interior of the positioning cylinder through the circulation holes inside the base. When the tail gas discharged is different from the oxygen concentration in the air, the oxygen molecules on the high-concentration side are adsorbed onto the first electrode, making the electrode positively charged. Conversely, the second electrode can be made negatively charged, so that the oxygen sensor can work normally. With the cooperation of the fixed seat, the first electrode and the second electrode, the heating rod can perform heating work, that is, the interior of the upper end of the positioning cylinder can be maintained at a stable constant temperature state, so that the device can quickly perform the induction work on the tail gas.

[0019] 2. The upper end of the insulating column of the present utility model is connected to the insulating pad, which can insulate the current that has not been completely insulated inside the insulating pad. That is, with the cooperation of the insulating pad and the insulating column, the occurrence of electric leakage can be effectively avoided, and damage can be avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a three-dimensional schematic diagram of the present utility model;

[0021] Figure 2 is a front cross-sectional view of the present utility model;

[0022] Figure 3 is a three-dimensional schematic diagram of the positional relationship between the base and the protective case in the present utility model;

[0023] Figure 4 is a three-dimensional schematic diagram of the positional relationship between the induction mechanism and the insulating column in the present utility model.

[0024] Reference numerals: 1. Base; 2. Protective case; 3. Induction mechanism; 301. Positioning cylinder; 302. Fixed seat; 303. Heating rod; 304. First electrode; 305. Second electrode; 306. Insulating pad; 4. Insulating column. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] To make the objectives, technical solutions, and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0026] Please refer to Figure 1 - Figure 4 , the present utility model provides a fast-response oxygen sensor, including:

[0027] A base 1; the role of the base 1 can ensure the overall installation stability of the device.

[0028] A protective shell 2, detachably installed below the base 1; the role of the protective shell 2 can achieve the purpose of protecting the positioning cylinder 301.

[0029] An induction mechanism 3, arranged inside the protective shell 2. The induction mechanism 3 includes a positioning cylinder 301 detachably installed inside the protective shell 2, a fixed seat 302 detachably installed inside the positioning cylinder 301, a heating rod 303 installed at the center of the fixed seat 302, a first electrode 304 and a second electrode 305 detachably installed at the upper part inside the inner side of the positioning cylinder 301, and an insulating pad 306 detachably installed at the lower part inside the positioning cylinder 301;

[0030] The positioning cylinder 301 can not only protect the internal components but also guide the gas. An air outlet is provided at the lower part of the positioning cylinder 301, and the gas can be discharged through the air outlet. The fixed seat 302 can ensure the installation stability of the heating rod 303, the first electrode 304, and the second electrode 305. The heating rod 303 is electrically connected to the first electrode 304 and the second electrode 305 through the fixed seat 302. The insulating pad 306 can achieve the purpose of insulation. The exhaust gas is introduced into the inside of the positioning cylinder 301 through the circulation hole inside the base 1. When the oxygen concentration of the discharged exhaust gas is different from that of the air, the oxygen molecules on the high-concentration side are adsorbed onto the first electrode 304, making the electrode positively charged. Conversely, the second electrode 305 can be made negatively charged, so that the oxygen sensor can work normally. With the cooperation of the fixed seat 302, the first electrode 304, and the second electrode 305, the heating rod 303 can be heated, that is, the inside of the upper end of the positioning cylinder 301 can be kept at a stable constant temperature, and the device can quickly sense the exhaust gas.

[0031] An insulating column 4, installed at the center of the lower end of the positioning cylinder 301; the upper end of the insulating column 4 is connected to the insulating pad 306, which can insulate the current that has not been completely insulated inside the insulating pad 306. That is, with the cooperation of the insulating pad 306 and the insulating column 4, the occurrence of electric leakage can be effectively avoided and damage can be prevented.

[0032] In this embodiment, preferably, a plurality of circulation holes are evenly formed in the circumferential outer wall of the base 1; the tail gas enters the interiors of the protective base 1 and the positioning cylinder 301 through the circulation holes.

[0033] In this embodiment, preferably, a clamping block is installed at the lower end of the base 1, and a clamping groove is formed on the upper end surface of the protective shell 2. The clamping block is located in the clamping groove; the installation stability of the clamping block can be ensured under the action of the clamping groove, and the connection stability between the base 1 and the protective shell 2 can be ensured under the cooperation of the clamping block and the clamping groove. Moreover, the clamping block and the clamping groove are connected by spot welding, which can ensure the connection stability between the base 1 and the protective shell 2.

[0034] In this embodiment, preferably, an internal thread is provided on the inner wall of the protective shell 2, and a threaded connection is provided on the circumferential outer wall of the upper part of the positioning cylinder 301. The protective shell 2 and the positioning cylinder 301 are threadedly connected; the connection stability between the protective shell 2 and the positioning cylinder 301 can be ensured through the threaded connection, and the protective shell 2 and the positioning cylinder 301 can be disassembled, which is convenient for combined installation.

[0035] In this embodiment, preferably, a plurality of through holes are evenly formed in the interior of the fixed seat 302; the purpose of the circulation of the tail gas can be achieved under the action of the through holes.

[0036] In this embodiment, preferably, connection blocks are installed on the outer side walls of the upper ends of the first electrode 304 and the second electrode 305, and a connection groove is formed at the upper end of the positioning cylinder 301. The connection blocks are installed in the connection groove; the installation stability of the connection blocks can be ensured under the action of the connection groove, and the connection stability between the positioning cylinder 301 and the first electrode 304 and the second electrode 305 can be ensured under the cooperation of the connection blocks and the connection groove, thereby ensuring the use effect of the first electrode 304 and the second electrode 305.

[0037] In this embodiment, preferably, the insulating pad 306 is made of zirconia ceramics, and positioning blocks are installed at the upper ends of the insulating pad 306. A positioning groove is formed at the lower end of the fixed seat 302. The positioning blocks are inserted into the positioning groove; the installation stability of the positioning blocks can be ensured under the action of the positioning groove, and the connection stability between the fixed seat 302 and the insulating pad 306 can be ensured under the cooperation of the positioning blocks and the positioning groove. Zirconia ceramics have the advantages of high toughness, high bending strength, high wear resistance, excellent heat insulation performance, and a thermal expansion coefficient close to that of steel.

[0038] Working principle and usage process of the utility model: When the device is in use, the base 1 can ensure the overall installation stability of the device. A plurality of through holes are evenly formed in the circumferential outer wall of the base 1, and the tail gas enters the inside of the protective base 1 and the positioning cylinder 301 through the through holes; under the action of the protective shell 2, the protection purpose of the positioning cylinder 301 can be achieved. The tail gas is introduced into the inside of the positioning cylinder 301 through the through holes inside the base 1. When the oxygen concentration of the discharged tail gas is different from that of the air, the oxygen molecules on the high-concentration side are adsorbed onto the first electrode 304 to make the electrode positively charged. On the contrary, the second electrode 305 can be made negatively charged, so that the oxygen sensor can work normally. With the cooperation of the fixing seat 302, the first electrode 304 and the second electrode 305, the heating rod 303 can be heated, that is, the inside of the upper end of the positioning cylinder 301 can be in a stable constant temperature state, so that the device can quickly perform the induction work on the tail gas; the upper end of the insulating column 4 is connected to the insulating pad 306, which can insulate the current that has not been insulated inside the insulating pad 306, that is, with the cooperation of the insulating pad 306 and the insulating column 4, the occurrence of electric leakage can be effectively avoided and damage can be prevented.

[0039] The above description of the disclosed embodiments enables those skilled in the art to implement or use the utility model. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein can be implemented in other embodiments without departing from the spirit or scope of the utility model. Therefore, the utility model will not be limited to these embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A fast-response oxygen sensor, characterized in that, Comprising: Base (1); Protective shell (2), detachably installed below the base (1); Induction mechanism (3), arranged inside the protective shell (2), the induction mechanism (3) includes a positioning cylinder (301) detachably installed inside the protective shell (2), a fixing seat (302) detachably installed inside the positioning cylinder (301), a heating rod (303) installed at the center of the fixing seat (302), a first electrode (304) and a second electrode (305) detachably installed at the upper part inside the positioning cylinder (301), and an insulating pad (306) detachably installed at the lower part inside the positioning cylinder (301); Insulating column (4), installed at the center of the lower end of the positioning cylinder (301).

2. The fast-response oxygen sensor according to claim 1, wherein: A plurality of circulation holes are evenly formed on the circumferential outer wall of the base (1).

3. A fast-response oxygen sensor according to claim 1, characterized in that: A clamping block is installed at the lower end of the base (1), and a clamping groove is formed on the upper end surface of the protective shell (2), and the clamping block is seated in the clamping groove.

4. A fast-response oxygen sensor according to claim 1, characterized in that: Internal threads are provided on the inner wall of the protective shell (2), and threaded connections are provided on the circumferential outer wall of the upper part of the positioning cylinder (301), and the protective shell (2) and the positioning cylinder (301) are threadedly connected.

5. A fast-response oxygen sensor according to claim 1, characterized in that: A plurality of through holes are evenly formed inside the fixing seat (302).

6. The fast-response oxygen sensor according to claim 1, wherein: Connection blocks are installed on the outer side walls of the upper ends of the first electrode (304) and the second electrode (305), and connection grooves are formed at the upper end of the positioning cylinder (301), and the connection blocks are installed in the connection grooves.

7. A fast-response oxygen sensor according to claim 1, characterized in that: The insulating pad (306) is made of zirconia ceramics, and positioning blocks are installed on the upper ends of the insulating pad (306), and positioning grooves are formed at the lower end of the fixing seat (302), and the positioning blocks are inserted into the positioning grooves.

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