CN215865623U

CN215865623U - Pressure sensor

Info

Publication number: CN215865623U
Application number: CN202122250482.4U
Authority: CN
Inventors: 不公告发明人
Original assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Current assignee: Zhejiang Sanhua Commercial Refrigeration Co ltd
Priority date: 2021-09-17
Filing date: 2021-09-17
Publication date: 2022-02-18
Anticipated expiration: 2031-09-17

Abstract

The utility model discloses a pressure sensor, which comprises a shell component and a pressure signal detection component, wherein the pressure signal detection component comprises a pressure core component and a detection cavity component, the detection cavity component comprises a detection seat body, the detection cavity component is provided with a medium cavity, the pressure core component is arranged in the medium cavity, the pressure core component comprises a ceramic circuit board and a pressure core body, the ceramic circuit board is electrically connected with the pressure core body, and the ceramic circuit board is fixedly connected with the detection seat body.

Description

Pressure sensor

Technical Field

The utility model relates to the technical field of sensor detection control, in particular to a pressure sensor.

Background

The pressure sensor is an important product in an industrial automatic control system, and is used for sensing measured pressure information and converting the measured pressure information into electric signal output information according to a certain rule. With the continuous development of science and technology, the application field of the pressure sensor in daily life is more and more extensive.

The pressure signal detection assembly is a core part in a pressure sensor product, and how to improve the working reliability of the pressure signal detection assembly is a problem to be considered by a person skilled in the art.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pressure sensor which comprises a shell component and a pressure signal detection component, wherein the pressure signal detection component is arranged in an inner cavity of the shell component, the pressure signal detection component comprises a pressure core component and a detection cavity component, the detection cavity component comprises a detection base body, the detection cavity component is provided with a medium cavity, the pressure core component is arranged in the medium cavity, the pressure core component comprises a ceramic circuit board and a pressure core body, the ceramic circuit board is electrically connected with the pressure core body, and the ceramic circuit board is fixedly connected with the detection base body.

According to the pressure sensor provided by the utility model, the ceramic circuit board is fixedly connected with the detection seat body and is electrically connected with the pressure core body, so that the stability of the electrical performance of the pressure core body can be improved, and the reliability of the pressure sensor is improved.

Drawings

FIG. 1: the utility model provides a structural schematic diagram of a pressure sensor;

FIG. 2: fig. 1 is a schematic perspective view of a pressure signal detecting assembly;

FIG. 3: FIG. 1 is a schematic cross-sectional view of a pressure signal detecting assembly;

FIG. 4: the utility model provides a structural schematic diagram of another pressure sensor. Symbolic illustration in fig. 1-4:

1/1A-pressure sensor;

10-a pressure signal detection component;

100-a pressure core component;

110-a ceramic circuit board;

120-a pressure core;

200-a detection cavity component;

210/210A-detection seat;

211-bottom wall, 212-upper wall;

213-fill hole, 214-seat step;

220-detection end body, 221-drainage hole;

230-a membrane;

240-sealing;

250-a first electrical connector;

260-media chamber, 270-drainage chamber;

280-glass medium;

300-a housing component;

310-a housing;

311-step hole portion;

320-cover, 321-inner convex;

330-a connector;

340-lumen;

350-a fluid port;

400-temperature core components;

410-a support;

420-a temperature sensing element;

430-an electrical connection sheet;

500-signal processing means;

510-a printed circuit board;

520-an insulating pad;

600-a mount component;

610-mounting a base;

611-mounting a step part;

612-a mounting hole section;

620/620A-second electrical connector.

Detailed Description

In order to make the technical solutions of the present invention better understood, the present invention will be further described in detail with reference to the accompanying drawings and specific embodiments. It is obvious that the drawings in the following description are only some embodiments of the utility model, and that for a person skilled in the art, other drawings can be derived from them without inventive effort. The upper and lower terms used herein are defined by the positions of the components shown in the drawings, and are only used for the sake of clarity and convenience in technical solution, and it should be understood that the terms used herein should not limit the scope of the claims; it will also be understood that the structural relationships illustrated herein, whether connected, secured, abutted, or otherwise, are intended to encompass both direct and indirect approaches, unless specifically noted to embody the novel concepts of its utility.

Fig. 1 is a schematic structural diagram of a pressure sensor according to the present invention.

As shown in fig. 1. The pressure sensor 1 includes a housing member 300, a temperature core member 400, a signal processing member 500, a mount member 600, and a pressure signal detection assembly 10. The pressure signal detection assembly 10 is disposed in the inner cavity 340 of the housing member 300, and the pressure signal detection assembly 10 includes a pressure core member 100 and a detection cavity member 200.

Fig. 2 is a schematic perspective view of the pressure signal detecting assembly shown in fig. 1, and fig. 3 is a schematic cross-sectional view of the pressure signal detecting assembly shown in fig. 1.

As shown in fig. 2, 3 and with reference to fig. 1. The detection cavity assembly 200 includes a detection base 210, a detection end 220 and a diaphragm 230. The detection seat 210 and the detection end body 220 may be made of metal materials, and the detection seat 210 and the detection end body 220 are fixedly connected by welding, and a cavity is formed in the cavity component 200 after the fixation.

The diaphragm 230 is welded between the detection holder body 210 and the detection end body 220, a chamber of the diaphragm 230 facing the bottom wall portion 211 of the detection holder body 210 serves as a medium chamber 260, a chamber between the diaphragm 230 and the detection end body 220 serves as a fluid drainage chamber 270, and the diaphragm 230 isolates the medium chamber 260 from the drainage chamber 270. The detection end body 220 includes a drainage aperture 221, and the drainage aperture 221 communicates with a drainage lumen 270.

The detection chamber body 200 further comprises a plug 240, and the bottom wall portion 211 of the detection housing 210 comprises a filling hole 213. The sensing medium chamber 260 can be filled with sensing medium through the filling hole 213, and the filling hole 213 is blocked by the stopper 240.

The pressure core component 100 is disposed in the media chamber 260, and the pressure core component 100 includes a ceramic circuit board 110 and a pressure core 120. In the present embodiment, the upper portion of the ceramic circuit board 110 is fixedly connected to the bottom wall portion 211 of the detection seat body 210, the lower portion of the ceramic circuit board 110 is fixedly connected to the pressure core 120, and the ceramic circuit board 110 is electrically connected to the pressure core 120.

The detection cavity component 200 further includes a plurality of pins as the first electrical connector 250, the detection base 210 can be made of a metal material, the first electrical connector 250 and the detection base 210 are fixed by sintering a glass medium 280, and the glass medium 280 electrically isolates the pins. The lower end of the first electrical connector 250 is electrically connected to the ceramic circuit board 110.

The technical scheme has the advantages that the ceramic circuit board 110 is fixed in the medium cavity 260, the pressure core 120 is fixed on the ceramic circuit board 110 in a welding or bonding mode, the process for electrically connecting the pressure core 120 and the ceramic circuit board 110 is relatively simple, the reliability is high, and the ceramic circuit board 110 can be directly welded with the first electric connector 250. The stability of the electrical performance of pressure core 120 is improved, and the reliability of the pressure sensor is improved.

As an extension of the above technical solution, refer to fig. 1. The signal processing unit 500 includes a printed circuit board 510, the printed circuit board 510 is fixed above the inspection socket 210, and the printed circuit board 510 is electrically isolated from the inspection socket 210 by an insulating pad 520. The upper end of the first electrical connector 250 extends out of the upper wall 212 of the detection base 210 and is electrically connected to the printed circuit board 510.

As an extension of the above technical solution, refer to fig. 1. Housing component 300 includes a housing 310, a cover 320, and a socket connector 330.

Cover 320 has a cylindrical shape and has an inner protrusion 321. Connector 330 abuts on inner projection 321, and cover 320 and connector 330 are fixedly connected by caulking the upper end of cover 320. The lower end of the cover 320 is fixedly welded to the housing 310.

The temperature core member 400 includes a support body 410, a temperature detection element 420, and an electrical connection sheet 430. The supporting body 410 is fixed on the positioning step of the housing 310, and the electrical connection sheet 430 is longitudinally fixed on the supporting body 410. A thermistor as the temperature detection element 420 is fixed by welding to the electrical connection sheet 430 to be electrically connected.

The pressure sensor 1 further includes a mounting base member 600, the mounting base member 600 includes a mounting base body 610, the mounting base body 610 may be made of a metal material, and the second electrical connector 620 and the mounting base body 610 are fixed by sintering a glass medium. Of course, the mounting base 610 may also be made of a metal material, and the second electrical connector 620 is disposed as an insert.

The second electrical connector 620 longitudinally penetrates the mounting base 610. The lower end of the second electrical connector 620 is electrically connected to the electrical connection sheet, and the upper end of the second electrical connector 620 is electrically connected to the printed circuit board 510. The technical scheme can ensure that the pressure sensor has compact structure and reliable electric connection.

As an extension of the above technical solution, refer to fig. 1. The outer side of the upper section of the mounting seat 610 includes a mounting step portion 611, and the housing 310 includes a step hole portion 311. The step hole portion 311 is in limit fit with the mounting step portion 611, and the mounting base 610 is sleeved on the housing 310 and welded. The housing 310 includes a fluid port 350, the fluid port 350 communicating with the inner bore of the stepped bore portion 311.

The upper segment of the mounting base 610 further includes a mounting hole portion 612, the outer side of the lower segment of the detection base 210 includes a base step portion 214, the mounting hole portion 612 is in limit fit with the base step portion 214, and the detection base 210 is sleeved on the mounting base 610 and is welded and fixed. This technical scheme makes each part of pressure sensor installation spacing reliable, compact structure.

Fig. 4 is a schematic structural diagram of another pressure sensor according to the present invention. As shown in fig. 4. Different from the foregoing technical solution, the first electrical connector 250 and the second electrical connector 620A of the pressure sensor 1A are fixed to the detection base 210A by sintering and welding through glass medium. The upper end of the second electrical connector 620A extends out of the upper wall of the detection base 210A and is electrically connected to the printed circuit board 510A. The temperature detection element 420 is electrically connected to the electrical connection sheet 430, and the electrical connection sheet 430 is electrically connected to the second electrical connector 620A. The technical scheme can enable the structure of the pressure sensor to be compact. And will not be described in detail herein.

The foregoing is only a preferred embodiment of the present invention, and it should be noted that it is obvious to those skilled in the art that various modifications and improvements can be made without departing from the principle of the present invention, and these modifications and improvements should also be considered as the protection scope of the present invention.

Claims

1. A pressure sensor comprising a housing component and a pressure signal sensing assembly disposed in an interior cavity of the housing component, wherein:

the pressure signal detection assembly comprises a pressure core body component and a detection cavity body component, the detection cavity body component comprises a detection seat body, the detection cavity body component is provided with a medium cavity, the pressure core body component is arranged in the medium cavity, the pressure core body component comprises a ceramic circuit board and a pressure core body, the ceramic circuit board is electrically connected with the pressure core body, and the ceramic circuit board is fixedly connected with the detection seat body.

2. The pressure sensor of claim 1, wherein the detection chamber body further comprises a detection end body and a diaphragm, the detection end body is fixedly connected to the detection base body, the medium cavity is disposed between the diaphragm and the bottom wall portion of the detection base body, the drainage cavity is disposed between the diaphragm and the detection end body, the diaphragm separates the medium cavity from the drainage cavity, and the detection end body comprises a drainage hole, the drainage hole communicates with the drainage cavity.

3. The pressure sensor according to claim 2, wherein the detection cavity further comprises a sealing plug, an upper portion of the ceramic circuit board is fixedly connected to a bottom wall portion of the detection base, a lower portion of the ceramic circuit board is fixedly connected to the pressure core, the bottom wall portion includes a filling hole, and the sealing plug seals the filling hole.

4. The pressure sensor according to claim 3, wherein the detection cavity further comprises a first electrical connector, the detection base is made of a metal material, the first electrical connector and the detection base are fixed by sintering a glass medium, and a lower end of the first electrical connector is electrically connected to the ceramic circuit board.

5. The pressure sensor according to claim 4, further comprising a signal processing unit, wherein the signal processing unit includes a printed circuit board, the printed circuit board is located above the detection base, and an upper end of the first electrical connector extends out of an upper wall portion of the detection base to be electrically connected to the printed circuit board.

6. The pressure sensor of claim 5, further comprising a temperature core member and a second electrical connector, wherein the temperature core member comprises a support body, a temperature sensing element and an electrical connector, and the electrical connector is fixedly connected with the support body; the pressure sensor further comprises a mounting seat component, the second electric connector is fixedly connected with the mounting seat component, the temperature detection element is electrically connected with the electric connecting sheet, the electric connecting sheet is electrically connected with the second electric connector, and the second electric connector is electrically connected with the printed circuit board.

7. The pressure sensor according to claim 5, wherein the pressure sensor further comprises a temperature core member and a second electrical connector, the temperature core member comprises a support body, a temperature detecting element and an electrical connector, the electrical connector is fixedly connected with the support body, the second electrical connector and the detection base body are fixed by sintering a glass medium, the upper end of the second electrical connector extends out of the upper wall portion of the detection base body and is electrically connected with the printed circuit board, the temperature detecting element is electrically connected with the electrical connector, and the electrical connector is electrically connected with the second electrical connector.

8. The pressure sensor of any of claims 1-7, wherein the pressure sensor comprises a mounting block member, the mounting block member comprises a mounting hole portion, the detection housing comprises a housing step portion, the mounting hole portion is in limit fit with the housing step portion, and the mounting block member is fixedly connected with the detection housing.

9. The pressure sensor of any of claims 1-7, wherein the pressure sensor comprises a mounting block member, the mounting block member comprising a mounting step, the housing member comprising a housing, the housing comprising a fluid port and a step bore portion, the mounting block member fixedly coupled to the housing through the step bore portion in positive engagement with the mounting step, the fluid port in communication with an inner bore of the step bore portion.

10. The pressure sensor according to claim 9, wherein the housing member further includes a cylindrical cover and a connector, the cover includes an inner protrusion, the connector abuts against the inner protrusion, the cover and the connector are riveted and fixed, and the cover and the housing are fixedly welded.