CN216349302U

CN216349302U - Pressure sensor protective structure

Info

Publication number: CN216349302U
Application number: CN202122596056.6U
Authority: CN
Inventors: 周健; 陆小红; 郭宇斌; 俞斌; 李子文
Original assignee: Wuxi United Trinity Electronics Co ltd
Current assignee: Wuxi United Trinity Electronics Co ltd
Priority date: 2021-10-27
Filing date: 2021-10-27
Publication date: 2022-04-19
Anticipated expiration: 2031-10-27

Abstract

The utility model discloses a pressure sensor protection structure which comprises a shell, a pressure gas channel and a pressure measurement element, wherein the shell is of a hollow structure with an opening at the bottom, the bottom end inside the shell is provided with the pressure gas channel, the top end inside the shell is provided with an electronic element installation chamber, the inner wall of the shell at the position of the electronic element installation chamber is fixedly connected with a support ring, an electronic element is electrically connected above a printed board, the bottom of the printed board is electrically connected with the pressure measurement element, the outside of the pressure measurement element is filled with silica gel in a wrapping mode, the space inside the support ring and below the silica gel is provided with a pressure cavity, the bottom of the pressure cavity is opposite to the pressure gas channel, the pressure cavity is communicated with the pressure gas channel, the silica gel is extruded and fixed on the inner wall of the support ring through a silica gel barrier, and a seal ring is arranged between the silica gel barrier and the support ring. This pressure sensor protective structure can effectively promote the corrosion-resistant and shock resistance of sensor, increases the working strength of sensor.

Description

Pressure sensor protective structure

Technical Field

The utility model relates to the technical field of pressure sensors, in particular to a pressure sensor protection structure.

Background

At present, most automobile gas pressure sensors in the market adopt a single glue bonding and sealing protection structure, and have the advantages of strong universality, simplicity in manufacturing and low equipment dependence degree. However, with the development of automobile technology, the requirements for automobile gas pressure sensors are increasingly increased, especially the gradual tightening of automobile exhaust emission indexes, the defects of unstable mass production quality, working medium gas corrosion resistance and poor pressure impact resistance of the automobile are more obvious, and once the automobile fails, partial functions of the automobile are damaged, and even the automobile cannot be started.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a pressure sensor protection structure to solve the problems that the current gas pressure sensor applied to the automobile in the background art cannot resist the corrosion of working medium gas and has poor pressure impact resistance.

In order to achieve the purpose, the utility model provides the following technical scheme: a pressure sensor protection structure comprises a shell, a pressure gas channel and a pressure measuring element, the casing is bottom open-ended hollow structure, establish to the pressure gas passageway in the inside bottom of casing, establish to the electronic component installation room on the inside top of casing, fixedly connected with support ring on the shells inner wall of electronic component installation room position, the laminating of support ring top installs the printing board, the top electric connection of printing board has electronic component, the bottom electric connection of printing board has pressure measurement component, pressure measurement component's outside parcel formula is filled has silica gel, the space that the inside silica gel below that is located of support ring is established to the pressure cavity, pressure cavity bottom is just to pressure gas passageway and pressure cavity and pressure gas passageway intercommunication, silica gel encloses the fender extrusion through silica gel and fixes on the support ring inner wall, silica gel encloses to keep off and installs the sealing ring between the support ring.

Preferably, the top of the housing is open, and a detachable cover is mounted on the top of the housing.

Preferably, the support ring and the housing are integrally formed.

Preferably, a gap exists between the printed board and the inner wall of the shell.

Preferably, two groups of pressure measuring elements, pressure cavities and pressure gas channels are arranged on the pressure sensor.

Compared with the prior art, the utility model has the beneficial effects that: the pressure sensor protection structure adopts the small cavity and the elastic sealing piece for sealing, only the pressure measuring element is in contact with the pressure cavity, the accumulation of medium gas condensate can be reduced, meanwhile, the pressure measuring element is filled with silica gel, and then the sealing ring is used for sealing, so that the sealing and corrosion resistance of the sensor are greatly improved.

The sensor is internally and independently supported by the support ring, so that the contact between the printed board and the inner wall of the pressure sensor is reduced, and meanwhile, the silicone gel surrounding baffle and the silicone gel are utilized to support and position the pressure measurement element at the bottom of the printed board, so that the shock resistance of the sensor is greatly improved.

Drawings

FIG. 1 is a schematic view of a partial cross-sectional structure of the present invention;

fig. 2 is a schematic view of the overall structure of the present invention.

In the figure: 1. comprises a shell; 2. a pressure gas channel; 3. an electronic component mounting chamber; 4. a pressure chamber; 5. a support ring; 6. printing a board; 7. an electronic component; 8. a pressure measuring element; 9. a silicone gel; 10. a silicone gel enclosure; 11. a seal ring; 12. a cover body.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

Referring to fig. 1-2, the present invention provides a technical solution: a pressure sensor protection structure comprises a shell 1, a pressure gas channel 2 and a pressure measurement element 8, wherein the shell 1 is of a hollow structure with an opening at the bottom, the bottom end inside the shell 1 is provided with the pressure gas channel 2, the top end inside the shell 1 is provided with an electronic element installation chamber 3, the inner wall of the shell 1 at the position of the electronic element installation chamber 3 is fixedly connected with a support ring 5, the top of the support ring 5 is provided with a printed board 6 in a fitting manner, an electronic element 7 is electrically connected above the printed board 6, the bottom of the printed board 6 is electrically connected with the pressure measurement element 8, the outside of the pressure measurement element 8 is filled with silica gel 9 in a wrapping manner, the space below the silica gel 9 inside the support ring 5 is provided with a pressure cavity 4, the bottom of the pressure cavity 4 is opposite to the pressure gas channel 2, the pressure cavity 4 is communicated with the pressure gas channel 2, and the silica gel 9 is extruded and fixed on the inner wall of the support ring 5 through a silica gel enclosure 10, a sealing ring 11 is mounted between the silicone gel surround 10 and the support ring 5.

Preferably, the top of the housing 1 is open, and a detachable cover 12 is attached to the top of the housing 1, so as to facilitate replacement and maintenance of the internal parts of the sensor.

Preferably, the support ring 5 and the housing 1 are integrally formed.

Preferably, there is a gap between printed board 6 and the inner wall of case 1.

Preferably, two sets of pressure measuring elements 8, pressure chamber 4 and pressure gas channel 2 are provided on the pressure sensor.

The working principle is as follows: this device is applied to car gas pressure sensor, and the during operation, medium gas enters into pressure cavity 4 through pressure gas passageway 2, and pressure measurement component 8 detects pressure and do not carry the outside through printing 6 records of board with data, and at this in-process, can effectively reduce the corruption of medium gas condensate to pressure measurement component 8, and the inside condensate of pressure cavity 4 directly discharges through pressure gas passageway 2, avoids the condensate gathering, and this structure has improved the inside anticorrosive ability of sensor.

The printed board 6 is installed on the support ring 5 and is not in contact with the shell 1, and meanwhile, the bottom of the printed board 6 is fixed on the support ring 5 through extrusion of the silicone gel 9 and the silicone gel surrounding baffle 10.

In maintenance, the lid 12 may be opened for maintenance.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A pressure sensor protective structure comprising a housing (1), a pressure gas channel (2) and a pressure measuring element (8), characterized in that: the shell (1) is of a hollow structure with an opening at the bottom, the bottom inside the shell (1) is arranged to be a pressure gas channel (2), the top inside the shell (1) is arranged to be an electronic element installation chamber (3), a support ring (5) is fixedly connected to the inner wall of the shell (1) at the position of the electronic element installation chamber (3), a printed board (6) is installed at the top of the support ring (5) in a fitting manner, an electronic element (7) is electrically connected to the upper side of the printed board (6), a pressure measurement element (8) is electrically connected to the bottom of the printed board (6), silica gel (9) is filled in the outside of the pressure measurement element (8) in a wrapping manner, a space below the silica gel (9) inside the support ring (5) is arranged to be a pressure cavity (4), the bottom of the pressure cavity (4) is just opposite to the pressure gas channel (2), and the pressure cavity (4) is communicated with the pressure gas channel (2), the silicone gel (9) is extruded and fixed on the inner wall of the support ring (5) through the silicone gel surrounding baffle (10), and a sealing ring (11) is arranged between the silicone gel surrounding baffle (10) and the support ring (5).

2. A pressure sensor guard structure according to claim 1, wherein: the top of the shell (1) is open, and a detachable cover body (12) is mounted at the top of the shell (1).

3. A pressure sensor guard structure according to claim 1, wherein: the support ring (5) and the shell (1) are integrally formed.

4. A pressure sensor guard structure according to claim 1, wherein: a gap exists between the printed board (6) and the inner wall of the shell (1).

5. A pressure sensor guard structure according to claim 1, wherein: and two groups of pressure measuring elements (8), a pressure cavity (4) and a pressure gas channel (2) on the pressure sensor are arranged.