CN206038583U - Layered tablet formula structure oxygen sensor - Google Patents

Abstract

The present application provides a multi-layer chip structure oxygen sensor, comprising a protective layer, a zirconia sensitive layer, a first porous transition layer, a reference gas channel layer, a second porous transition layer and A heating layer, an external electrode and an internal electrode are arranged on the surface of the zirconia sensitive layer, and several heating sheets are arranged on the heating layer, and the heating sheet includes a base, an internal electrode rod and several external electrode rods, so Both the inner electrode rod and the outer electrode rod are arranged on the base, and several outer electrode rods are evenly distributed around the inner electrode rod. The heating sheet also includes a circular groove, and a heating wire is arranged in the circular groove. The multi-layer chip structure oxygen sensor provided by the present application improves the stability performance of the multi-layer chip structure oxygen sensor because the first porous transition layer and the second porous transition layer are provided. There are heating wires, thus making the heating speed fast.

Description

A multi-layer chip structure oxygen sensor

technical field

The utility model relates to a sensor, in particular to a multi-layer chip structure oxygen sensor.

Background technique

Oxygen sensor is an important sensing component in the EFI engine control system, and it is a key part to control automobile exhaust emissions, reduce automobile environmental pollution, and improve the fuel combustion quality of automobile engines. Only the exhaust gas discharged from the engine exhaust pipe after heating can participate in the reaction. After the reaction, there will be a voltage change, and the oxygen sensor can receive the signal, and the characteristics of the oxygen sensor can be fully reflected. The existing chip structure oxygen sensor is used During the process, due to constant heating and cooling, the heating becomes slow, resulting in poor stability. To sum up, it is an urgent problem for those skilled in the art to develop a multi-layer chip structure oxygen sensor with better stability and faster heating.

Utility model content

The purpose of the utility model is to provide a multi-layer chip structure oxygen sensor, which solves the problems of poor stability and slow heating caused by the existing multi-layer chip structure oxygen sensor.

In order to solve the above technical problems, the utility model provides the following technical solutions:

A multi-layer chip structure oxygen sensor, comprising a protective layer, a zirconia sensitive layer, a first porous transition layer, a reference gas channel layer, a second porous transition layer and a heating layer arranged sequentially from top to bottom, the An external electrode and an internal electrode are arranged on the surface of the zirconia sensitive layer, and several heating sheets are arranged on the heating layer, and the heating sheet includes a base, an internal electrode rod and several external electrode rods, and the internal electrode rod and the outer electrode rods are all arranged on the base, and several outer electrode rods are evenly distributed around the inner electrode rods, and the heating sheet also includes a circular groove, and a heating wire is arranged in the circular groove.

Further, the upper surface of the zirconia sensitive layer is provided with an external electrode, and the lower surface of the zirconia sensitive layer is provided with an internal electrode.

Furthermore, one end of the circular groove extends to the inner electrode rod, and the other end of the circular groove extends to the outer electrode rod.

Furthermore, the number of said circular grooves is 5-7.

Further, the reference gas channel layer is provided with a reference gas channel for accommodating a reference gas.

Further, the thickness of the first porous transition layer and the second porous transition layer is 10-25 microns.

Further, the number of the heating chips is 5-7.

As can be seen from the above technical solutions, the utility model has the following beneficial effects:

1. Since the first porous transition layer and the second porous transition layer are provided, the stability performance of the multilayer chip structure oxygen sensor is improved;

2. Since the heating wire is arranged in the annular groove, the heating speed is fast and durable.

The utility model will be described in further detail below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description It is only an embodiment of the utility model, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic structural diagram of the zirconia sensitive layer of the present invention.

Fig. 3 is a structural schematic diagram of the heating sheet of the present invention.

Explanation of reference numerals: protective layer 1, zirconia sensitive layer 2, external electrode 21, internal electrode 22, first porous transition layer 3, reference gas channel layer 4, reference gas channel 41, second porous transition layer 5. Heating layer 6 , heating sheet 61 , base 611 , circular groove 612 , outer electrode rod 613 , inner electrode rod 614 , and heating wire 615 .

detailed description

The embodiments of the utility model will be described in detail below in conjunction with the accompanying drawings, but the utility model can be implemented in various ways defined and covered by the claims.

The present application will be further described below with reference to FIGS. 1 to 3. A multilayer chip structure oxygen sensor as shown in FIG. 1 includes a protective layer 1, a zirconia sensitive layer 2, a first poly Pore transition layer 3, reference gas channel layer 4, second porous transition layer 5 and heating layer 6, external electrodes 21 and internal electrodes 22 are arranged on the surface of the zirconia sensitive layer 2, and on the heating layer 6 Several heating chips 61 are provided, as shown in Figure 3, the heating chip 61 includes a base 611, an inner electrode rod 614 and several outer electrode rods 613, and the inner electrode rods 614 and the outer electrode rods 613 are all arranged on the base 611, and several outer electrode rods 613 are evenly distributed around the inner electrode rod 614, the heating plate 61 also includes a circular groove 612, and a heating wire 615 is arranged in the circular groove 612, thus making the heating speed fast , Durable.

As shown in FIG. 2 , the upper surface of the zirconia sensitive layer 2 is provided with an external electrode 21 , and the lower surface of the zirconia sensitive layer 2 is provided with an internal electrode 22 .

As shown in FIG. 3 , one end of the circular groove 612 extends to the inner electrode rod 614 , and the other end of the circular groove 612 extends to the outer electrode rod 613 .

The number of the circular grooves 612 is 5-7.

Preferably, the number of said circular grooves 612 is six.

As shown in FIG. 1 , the reference gas channel layer 4 is provided with a reference gas channel 41 containing a reference gas.

The thickness of the first porous transition layer 3 and the second porous transition layer 5 is 10-25 microns.

The number of the heating chips 61 is 5-7.

Preferably, the number of the heating chips 61 is seven.

The first porous transition layer 3 and the second porous transition layer 5 can adjust the interlayer stress caused by thermal expansion of different structural layers, prevent cracking between layers, ensure the service life of the oxygen sensor, and ensure different The stable performance between the structural layers improves the performance of the oxygen sensor.

The above are only preferred embodiments of the utility model, and are not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present utility model shall be included in the protection scope of the present utility model.

Claims (7)

1. a kind of monolithic multilayer structure oxygen sensor, including the protective layer (1), zirconium oxide sensitive layer that set gradually from top to bottom (2), the first Porous transition layer (3), reference gas channel layer (4), the second Porous transition layer (5) and zone of heating (6), the zirconium oxide External electrode (21) and interior electrode (22) is provided with the surface of sensitive layer (2), it is characterised in that arranged on zone of heating (6) There are several heating plates (61), described heating plate (61) include base (611), interior electrode stem (614) and several dispatch from foreign news agency pole bars (613), interior electrode stem (614) and dispatch from foreign news agency pole bar (613) are arranged on base (611), and several dispatch from foreign news agency pole bars (613) it is evenly distributed on around interior electrode stem (614), heating plate (61) also include circular trough (612), the ring Heater strip (615) is provided with row groove (612).

2. monolithic multilayer structure oxygen sensor according to claim 1, it is characterised in that zirconium oxide sensitive layer (2) Upper surface be provided with external electrode (21), the lower surface of zirconium oxide sensitive layer (2) is provided with interior electrode (22).

3. monolithic multilayer structure oxygen sensor according to claim 2, it is characterised in that the one of circular trough (612) End is extended on interior electrode stem (614), and the other end of circular trough (612) is extended in dispatch from foreign news agency pole bar (613).

4. monolithic multilayer structure oxygen sensor according to claim 3, it is characterised in that circular trough (612) Number is 5～7.

5. monolithic multilayer structure oxygen sensor according to claim 1, it is characterised in that the reference gas channel layer（4） It is provided with reference gas passage (41) for accommodating reference gas.

6. monolithic multilayer structure oxygen sensor according to claim 1, it is characterised in that the first Porous transition layer (3) thickness of and the second Porous transition layer (5) is 10～25 microns.

7. monolithic multilayer structure oxygen sensor according to claim 1, it is characterised in that the number of heating plate (61) For 5～7.