CN214843778U - Shell assembly for pressure sensor and pressure sensor - Google Patents

Abstract

The utility model provides a casing subassembly and pressure sensor for pressure sensor, this casing subassembly for pressure sensor include casing body, baffle and a plurality of inlet structure, and the casing body has the chamber that holds that runs through the setting along the first direction, and the baffle is located hold the intracavity, and will hold the chamber and separate into antechamber and back chamber along the first direction, every inlet structure is including the installation 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 be equipped with on the frame with the import of pressure interface intercommunication, the intercommunicating pore with certainly the skew setting of the outflow direction of the fluid medium that the import flows.

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. The detection medium of the pressure sensor is usually a fluid medium, and the pressure chip is easily damaged if the fluid medium directly impacts the pressure chip when entering the pressure 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 if direct impact pressure chip when fluid medium gets into pressure sensor, damages the problem of pressure chip easily.

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 is including the installation 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 be equipped with on the frame with the import of pressure interface intercommunication, the intercommunicating pore with certainly the skew setting of the outflow direction of the fluid medium that the import flows out.

Preferably, the distance between the communication hole and the outflow direction of the fluid medium flowing out from the inlet is D1, and D1 is more than or equal to 1 cm.

Preferably, the enclosure frame comprises a lower frame arranged opposite to the pressure interface along the second direction, the lower frame is provided with the inlet, and the inner surface of the lower frame is obliquely arranged from the inlet towards the second direction towards the third direction so as to form a guide structure.

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, 10 DEG-A-15 deg.

Preferably, the shell body, the partition plate and the plurality of air inlet structures are integrally arranged.

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

Preferably, the two air inlet structures are spaced apart in the second direction or the third direction.

In order to achieve the above object, the present invention further provides a pressure sensor, including the above casing assembly for a 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.

The utility model discloses a intercommunicating pore with from the skew setting of the outflow direction of the fluid medium that the import flows out, so, fluid medium gets into from pressure interface, and fluid medium is not direct impact intercommunicating pore when the import that encloses the frame gets into, avoids damaging pressure chip.

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 a perspective view of a portion of the structure 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;

FIG. 5 is a perspective view of a further embodiment of the present embodiment providing a pressure sensor;

fig. 6 is a partial schematic view of the housing assembly of fig. 5 from a first 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, this housing assembly for pressure sensor 100 includes casing body 1, baffle 2 and a plurality of inlet structure 3, and casing body 1 has the chamber that holds that sets up along first direction run through, and baffle 2 locates hold the intracavity, and will hold the chamber and separate into front chamber 11 and rear chamber 12 along first direction (in this embodiment, first direction is fore-and-aft direction), and every inlet structure 3 is including the installation pressure interface 31a of the bottom wall of casing body 1, 31b, run through the intercommunicating pore 32a, 32b that locates baffle 2 and enclose establish intercommunicating pore 32a, 32b and be located the enclosure frame 33a, 33b of rear chamber 12, be equipped with on the enclosure frame 33a, 33b with the import 3311a, 3311b of pressure interface 31a, 31b intercommunication, intercommunicating pore 32a, 32b are arranged offset to the outflow direction of the fluid medium flowing out of said inlets 3311a, 3311 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.

The utility model discloses a intercommunicating pore 32a, 32b with from the skew setting of the outflow direction of the fluid medium that import 3311a, 3311b flowed out, so, fluid medium gets into from pressure interface 31a, 31b, and fluid medium is not direct impact intercommunicating pore 32a, 32b when enclosing frame 33a, 33 b's import 3311a, 3311b got into, leads to damaging pressure chip 300 etc..

In this embodiment, the distance between the communication holes and the flowing direction (the second direction in this embodiment, the vertical direction) of the fluid medium flowing out from the inlets 3311a, 3311b is D1, and D1 is not less than 1 cm. D1 is too small, the fluid medium flowing from the inlets 3311a, 3311b still has a certain impact force on the communication holes 32a, 32 b. The specific setting of the upper limit of D1 requires reference to the size of the pressure sensor to avoid affecting overall size.

In addition, in order to avoid that the pressure sensor is in a low temperature environment, the moisture generated by the fluid medium is condensed into liquid and is easily accumulated in the sensor to be frozen, the enclosure frames 33a, 33b include lower frames 331a, 331b disposed opposite to the pressure ports 31a, 31b along the second direction (in this embodiment, the second direction is the up-down direction), the lower frames 331a, 331b have the inlets 3311a, 3311b, and the inner surfaces of the lower frames 331a, 331b are disposed obliquely from the inlets 3311a, 3311b toward the second direction toward the third direction (in this embodiment, the third direction is the left-right direction) to form the guide structures 3312a, 3312 b. By arranging the guide structures 3312a, 3312b, the vapor generated by the fluid medium can be condensed into liquid, and the liquid is guided by the guide structures 3312a, 3312b to enter the pressure ports 31a, 31b and flow out, so that the accumulation and freezing of the liquid condensed from the vapor in the pressure sensor can be avoided.

Specifically, the inclination angle of the inner surfaces of the lower frames 331a and 331b with respect to the third direction is a, and a is too large, which affects the overall size, in this embodiment, a is greater than 0 and less than or equal to 15 °. Preferably, 10 DEG-A-15 deg. Preferably, 10 DEG-A-15 deg. Preferably, a is 12 °.

In this embodiment, the housing body 1, the partition plate 2, and the plurality of air inlet structures 3 are integrally disposed. In other embodiments, the housing body 1, the partition plate 2, and the plurality of air inlet structures 3 may be provided separately.

In the present embodiment, the number of the air intake structures 3 is two. The two air inlet structures 3 may be connected to the back side of the pressure chip 300 to sense the pressure on the back side of the pressure chip 300, and may be connected to the front side of the pressure chip 300 to sense the pressure on the front side of the pressure chip 300, so as to serve as a differential pressure sensor.

The present invention also provides a pressure sensor, which includes the above-mentioned housing assembly 100 for a pressure sensor. The pressure sensor includes all embodiments of the housing assembly 100 described above for the pressure sensor.

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 210, the pressure hole 210 is arranged opposite to the communication hole 32a of the first air inlet structure 3a in the second direction, and the pressure chip 300 is mounted on the circuit board 200 at the back of the pressure chip 300 and covers the pressure hole 210.

The pressure sensor further comprises an upper cover and a lower cover 400, wherein the upper cover covers the opening of the front cavity 11, the lower cover 400 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 (10)

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

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 is including the installation 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 be equipped with on the frame with the import of pressure interface intercommunication, the intercommunicating pore with certainly the skew setting of the outflow direction of the fluid medium that the import flows out.

2. The housing assembly for a pressure sensor of claim 1, wherein the communication hole is spaced from the outflow direction of the fluid medium flowing from the inlet by a distance D1, D1 ≧ 1 cm.

3. A housing assembly for a pressure sensor according to claim 1, wherein said enclosure includes a lower rim disposed opposite said pressure port in a second direction, said lower rim having said inlet, an inner surface of said lower rim being disposed obliquely from said inlet toward said second direction toward a third direction to form a guide structure.

4. A housing assembly for a pressure sensor according to claim 3 wherein the inner surface of said lower rim has an angle of inclination a with respect to the third direction of 0 < a ≦ 15 °.

5. A housing assembly for a pressure sensor according to claim 4, wherein 10 ° ≦ A ≦ 15 °.

6. The housing assembly for a pressure sensor of claim 1, wherein said housing body, said diaphragm, and said plurality of air inlet structures are integrally formed.

7. The housing assembly for a pressure sensor of claim 1, wherein the number of air intake structures is two.

8. A housing assembly for a pressure sensor according to claim 7 wherein the two air inlet formations are spaced apart in the second or third direction.

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:

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.

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