CN214251360U

CN214251360U - Shell assembly for pressure sensor and pressure sensor

Info

Publication number: CN214251360U
Application number: CN202120327381.XU
Authority: CN
Inventors: 王小平; 曹万; 王红明; 张超军; 梁世豪; 王晓燕
Original assignee: Wuhan Finemems Inc
Current assignee: Wuhan Finemems Inc
Priority date: 2021-02-04
Filing date: 2021-02-04
Publication date: 2021-09-21
Anticipated expiration: 2031-02-04

Abstract

The utility model provides a casing subassembly and pressure sensor for pressure sensor, this casing subassembly for pressure sensor includes casing body, baffle and a plurality of inlet structure, and casing body has the chamber that holds that runs through the setting along first direction, and the baffle is located hold the intracavity, and will hold the chamber and separate into front chamber and back chamber along first direction, and every inlet structure is including installing in the pressure interface of the diapire of casing body, running through the intercommunicating pore that establishes in the baffle, and enclose establish the intercommunicating pore and be located the enclose frame of back chamber, enclose the frame and include the lower frame that sets up with the pressure interface along the second direction is relative, the lower frame have with the import of pressure interface intercommunication, the pressure interface, enclose the inner chamber of frame and intercommunicating pore intercommunication and form the fluid medium passageway, the internal surface of lower frame is the slope setting along the fluid medium flow direction, to form the guide structure.

Description

Shell assembly for pressure sensor and pressure sensor

Technical Field

The embodiment of the utility model provides a relate to pressure sensor technical field, in particular to a shell body subassembly and pressure sensor for pressure sensor.

Background

A Pressure Transducer is a device or apparatus that senses a Pressure signal and converts the Pressure signal into a usable output electrical signal according to a certain rule. In the pressure sensor in the prior art, under a low-temperature environment, water vapor generated by a fluid medium is condensed into liquid, and the liquid is easy to accumulate and freeze in the sensor.

SUMMERY OF THE UTILITY MODEL

An object of the embodiment of the utility model is to provide a casing subassembly and pressure sensor for pressure sensor aims at solving the easy problem that freezes of pressure sensor under low temperature environment.

In order to solve the above technical problem, an embodiment of the present invention provides a housing assembly for a pressure sensor, including:

the shell body is provided with an accommodating cavity which penetrates through the shell body along a first direction;

the partition plate is arranged in the accommodating cavity and divides the accommodating cavity into a front cavity and a rear cavity along a first direction;

a plurality of inlet structure, every inlet structure including install in the pressure interface of the diapire of casing body, run through and locate the intercommunicating pore of baffle and enclose and establish the intercommunicating pore just is located the frame that encloses of back chamber, enclose the frame include with the lower frame that the pressure interface set up along the second direction is relative, the lower frame have with the import of pressure interface intercommunication, the pressure interface enclose the inner chamber of frame and intercommunicating pore intercommunication formation fluid medium passageway, the internal surface of lower frame is the slope setting along the fluid medium flow direction to form the water conservancy diversion structure.

The utility model discloses an internal surface that sets up down the frame is the slope setting along the fluid medium flow direction to form the water conservancy diversion structure, the steam condensation that can make the fluid medium produce becomes liquid and flows through water conservancy diversion structure water conservancy diversion entering pressure interface, so can avoid the liquid that the steam condensation becomes to gather in pressure sensor and freeze.

Preferably, the inclination angle of the inner surface of the lower frame relative to the third direction is A, and A is more than 0 and less than or equal to 15 degrees.

Preferably, the inclination angle of the inner surface of the lower frame relative to the third direction is A, and A is more than or equal to 10 and less than or equal to 15 degrees.

Preferably, enclose the frame still include with the relative last frame that sets up of lower frame and backstop board, the backstop board certainly go up the frame and extend along the second direction and with the lower frame is the interval setting, in order with enclose the frame and separate into the first chamber and the second chamber of intercommunication, pressure interface is located first chamber, the intercommunicating pore is located the second chamber.

Preferably, the stopper plate has a lower end edge near the lower rim, the lower end edge being disposed beyond the communication hole in the second direction.

Preferably, the enclosure frame further includes a side frame disposed in the second cavity, the side frame has a connection section, the connection section extends from the lower frame along the second direction and exceeds the stop plate, the connection section and the stop plate are disposed at an interval to form a groove, so that the fluid medium passes through the groove and enters the communication hole after passing through the first cavity.

Preferably, the side frame further includes an inclined section connected to the connection section, the inclined section is disposed to be inclined outward from an end edge of the connection section, and the inclined section and the communication hole are arranged at intervals along the second direction.

Preferably, the number of the air intake structures is 2.

The utility model provides a pressure sensor, including foretell casing subassembly that is used for pressure sensor.

Preferably, the number of the air inlet structures is 2, the air inlet structures comprise a first air inlet structure and a second air inlet structure which are arranged at intervals, and a communication hole of the second air inlet structure is communicated with the front cavity;

the pressure sensor further includes:

the circuit board is arranged on the partition plate and positioned in the front cavity, and is provided with a pressure hole which is opposite to the communication hole of the first air inlet structure in the second direction;

and the back surface of the pressure chip is arranged on the circuit board and covers the pressure hole.

Drawings

One or more embodiments are illustrated by way of example in the accompanying drawings, which correspond to the figures in which like reference numerals refer to similar elements and which are not to scale unless otherwise specified.

FIG. 1 is a perspective view of an embodiment of a pressure sensor provided in the present embodiment;

FIG. 2 is an exploded view of FIG. 1;

FIG. 3 is a partial schematic view of the housing assembly of FIG. 2 from a first perspective;

fig. 4 is a partial schematic view of the housing assembly of fig. 2 from a second perspective.

The utility model discloses the drawing reference number explains:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

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 creative efforts belong to the protection scope of the present invention.

It should be noted that, if directional indications (such as upper, lower, left, right, front and rear … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indications are changed accordingly.

In addition, if there is a description relating to "first", "second", etc. in the embodiments of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a housing assembly for pressure sensor, please refer to fig. 1 to 4, the housing assembly 100 for pressure sensor comprises a housing body 1, a partition plate 2, and a plurality of air inlet structures 3 (in this embodiment, the housing body 1, the partition plate 2, and the air inlet structures 3 can be integrally formed, or can be separately formed, and are not limited in this respect), the housing body 1 has a containing cavity running through along a first direction (in this embodiment, the first direction is a front-back direction), the partition plate 2 is disposed in the containing cavity and divides the containing cavity into a front cavity 11 and a back cavity 12 along the first direction, each air inlet structure 3 comprises a pressure interface 31a and a pressure interface 31b installed on the bottom wall of the housing body 1, a communication hole 32a and a communication hole 32b penetrating through the partition plate 2, and a communication hole 32a surrounding the communication hole, 32b and located in the

enclosure frames

33a, 33b of the rear cavity 12, where the

enclosure frames

33a, 33b include

lower frames

331a, 331b opposite to the

pressure ports

31a, 31b along a second direction (in this embodiment, the second direction is an up-down direction), the

lower frames

331a, 331b have

inlets

3311a, 3311b communicated with the

pressure ports

31a, 31b, the inner cavities of the

enclosure frames

33a, 33b and the

communication holes

32a, 32b are communicated to form a fluid medium channel, and inner surfaces of the

lower frames

331a, 331b are inclined along a fluid medium flow direction to form

flow guiding structures

3312a, 3312 b.

When the air inlet structure 3 is one, the housing assembly 100 for a pressure sensor provided by the present invention may be a pressure sensor that senses pressure at the back side and measures absolute pressure; when the number of the intake structures 3 is two, the pressure sensor may be a differential pressure sensor for measuring a differential pressure or a pressure sensor for measuring a gauge pressure, and is not particularly limited herein.

In the pressure sensor in the prior art, under a low-temperature environment, water vapor generated by a fluid medium is condensed into liquid, and the liquid is easy to accumulate and freeze in the sensor.

The utility model discloses a set up down

frame

331a, 331 b's internal surface is the slope setting along the fluid medium flow direction to form water

conservancy diversion structure

3312a, 3312b, the steam condensation that can make the fluid medium produce becomes liquid through water

conservancy diversion structure

3312a, 3312b water conservancy diversion gets into

pressure interface

31a, 31b flows out, so can avoid the liquid that the steam condensation becomes to freeze at pressure sensor cohesion.

In the present embodiment, the

flow guiding structures

3312a, 3312b may be inclined toward the second direction toward the third direction (in the present embodiment, the

flow guiding structures

3312a, 3312b may also be inclined toward the right direction), and the

flow guiding structures

3312a, 3312b may be inclined toward the

communication holes

32a, 32b to the

pressure ports

31a, 31 b.

Specifically, the inclination angle of the inner surfaces of the

lower frames

331a, 331b with respect to the third direction (in this embodiment, the third direction is the left-right direction) is a, and a is too large, which affects the overall size, and in this embodiment, 0 < a ≦ 15 °. Preferably, 10 DEG-A-15 deg.

The surrounding

frames

33a, 33b further include

upper frames

332a, 332b opposite to the

lower frames

331a, 331b, and stop plates 333a, 333b, where the stop plates 333a, 333b extend from the

upper frames

332a, 332b along the second direction and are spaced apart from the

lower frames

331a, 331b to divide the surrounding

frames

33a, 33b into a

first cavity

3341a, 3341b and a

second cavity

3342a, 3342b, the

pressure ports

31a, 31b are located in the

first cavity

3341a, 3341b, and the

communication holes

32a, 32b are located in the

second cavity

3342a, 3342 b. By providing the stop plates 333a, 333b, the stop plates 333a, 333b divide the inner space of the

enclosure

33a, 33b into the

first chamber

3341a, 3341b and the

second chamber

3342a, 3342b, which are in communication with each other, such that the fluid medium entering from the

pressure connection

31a, 31b enters the

first chamber

3341a, 3341b, then enters from the

first chamber

3341a, 3341b into the

second chamber

3342a, 3342b and then enters into the

communication hole

32a, 32b, the direct impact of the fluid medium on the pressure chip 300 covering the

communication hole

32a, 32b can be avoided by the provision of the stop plates 333a, 333 b.

Further, the stopper plates 333a, 333b have lower end edges near the

lower rims

331a, 331b, which are disposed beyond the

communication holes

32a, 32b in the second direction, so that it is possible to further restrict the fluid medium from directly striking the pressure chip 300 in which the

communication holes

32a, 32b are disposed.

Specifically, the surrounding

frames

33a, 33b further include side frames 335a, 335b disposed on the

second cavities

3342a, 3342b, the side frames 335a, 335b have connecting

sections

3351a, 3351b, the connecting

sections

3351a, 3351b extend from the

lower frames

331a, 331b in the second direction and are disposed beyond the stop plates 333a, 333b, and the connecting

sections

3351a, 3351b are spaced apart from the stop plates 333a, 333b to form grooves through which the fluid medium passes into the communicating

holes

32a, 32b after passing through the

first cavities

3341a, 3341b, so that the fluid medium is prevented from directly impacting the pressure chip 300 disposed on the communicating

holes

32a, 32 b.

Further, the side frames 335a and 335b may further include

inclined segments

3352a and 3352b connected to the connecting

segments

3351a and 3351b, the

inclined segments

3352a and 3352b may be inclined outward from the end edges of the

connecting segments

3351a and 3351b (in this embodiment, the

inclined segments

3352a and 3352b may be inclined upward and rightward from the end edges of the

connecting segments

3351a and 3351 b), and the

inclined segments

3352a and 3352b may be spaced apart from the

communication holes

32a and 32b in the second direction. Thus, the vapor generated by the fluid medium is condensed into liquid and guided into the flow-guiding

structures

3312a, 3312b through the

inclined sections

3352a, 3352b to flow out of the

pressure ports

31a, 31 b.

In the present embodiment, the number of the air intake structures 3 is 2. And 2 air inlet structures 3, one of which can be connected to the back surface of the pressure chip 300 to enable the back surface of the pressure chip 300 to sense pressure, and the other of which can enter the front surface of the pressure chip 300 to enable the front surface of the pressure chip 300 to sense pressure, so that the pressure sensor can be used as a differential pressure sensor.

The present invention further provides a pressure sensor, please refer to fig. 1 to 4, which includes the above-mentioned housing assembly for a pressure sensor. The pressure sensor includes all embodiments of the housing assembly for a pressure sensor described above.

Further, the number of the air inlet structures 3 is 2, and the air inlet structures comprise a first air inlet structure 3a and a second air inlet structure 3b which are arranged at intervals, and the communication hole 32b of the second air inlet structure 3b is communicated with the front cavity 11; the pressure sensor further comprises a circuit board 200 and a pressure chip 300, wherein the circuit board 200 is mounted on the partition board 2 and located in the front cavity 11, the circuit board 200 is provided with a pressure hole, the pressure hole is arranged opposite to the communication hole 32a of the first air inlet structure 3a in the second direction, and the back surface of the pressure chip 300 is mounted on the circuit board 200 and covers the pressure hole.

The pressure sensor further comprises an upper cover 400 and a lower cover 500, wherein the upper cover 400 covers the opening of the front cavity 11, the lower cover 500 covers the rear cavity 12, and the inner cavity of the surrounding frame 33a of the first air inlet structure 3a and the inner cavity of the surrounding frame 33b of the second air inlet structure 3b are respectively sealed and covered.

The above is only the preferred embodiment of the present invention, not so limiting the patent scope of the present invention, all of which are in the utility model discloses a conceive, utilize the equivalent structure transform that the content of the specification and the attached drawings did, or directly/indirectly use all to include in other relevant technical fields the patent protection scope of the present invention.

Claims

1. A housing assembly for a pressure sensor, comprising:

2. The housing assembly for a pressure sensor of claim 1, wherein the inner surface of the lower bezel has an inclination angle a with respect to the third direction of 0 < a ≦ 15 °.

3. The housing assembly for a pressure sensor of claim 2 wherein the inner surface of the lower bezel is inclined at an angle a of 10 ° a 15 ° with respect to the third direction.

4. The housing assembly for a pressure sensor of claim 1, wherein the enclosure further comprises an upper rim disposed opposite the lower rim, and a stop plate extending from the upper rim in a second direction and spaced apart from the lower rim to divide the enclosure into a first chamber and a second chamber in communication, the pressure port being located in the first chamber and the communication aperture being located in the second chamber.

5. The housing assembly for a pressure sensor of claim 4, wherein the stop plate has a lower end edge proximate the lower rim, the lower end edge being disposed beyond the communication aperture in the second direction.

6. The housing assembly of claim 4, wherein the enclosure further comprises a side frame disposed in the second chamber, the side frame having a connecting section extending from the lower frame in the second direction and disposed beyond the stop plate, the connecting section being spaced from the stop plate to form a channel for fluid medium to pass through the channel and into the communication hole after passing through the first chamber.

7. The housing assembly for a pressure sensor according to claim 6, wherein the side frame further includes an inclined portion connected to the connecting portion, the inclined portion being disposed to be inclined outward from an end edge of the connecting portion, the inclined portion being spaced apart from the communication hole in the second direction.

8. The housing assembly for a pressure sensor of any one of claims 1 to 7 wherein the number of air inlet structures is 2.

9. A pressure sensor, characterized in that it comprises a housing assembly for a pressure sensor according to any one of claims 1 to 8.

10. The pressure sensor of claim 9, wherein the number of the air inlet structures is 2, and the air inlet structures comprise a first air inlet structure and a second air inlet structure which are arranged at intervals, and the communication hole of the second air inlet structure is communicated with the front cavity;

the pressure sensor further includes: