CN214010393U - Temperature and pressure sensor - Google Patents

Temperature and pressure sensor Download PDF

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Publication number
CN214010393U
CN214010393U CN202023056443.2U CN202023056443U CN214010393U CN 214010393 U CN214010393 U CN 214010393U CN 202023056443 U CN202023056443 U CN 202023056443U CN 214010393 U CN214010393 U CN 214010393U
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China
Prior art keywords
temperature
pressure sensor
pressure
conductive element
conductive
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Active
Application number
CN202023056443.2U
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Chinese (zh)
Inventor
王小平
曹万
吴林
王浩
吴培宝
赵秀平
曾权
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Wuhan Finemems Inc
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Wuhan Finemems Inc
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Priority to CN202023056443.2U priority Critical patent/CN214010393U/en
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Abstract

The utility model provides a temperature and pressure sensor, which comprises a shell, a ceramic piece, a circuit board, a pressure sensitive element, a conductive element and a temperature sensitive element, wherein the shell is provided with an installation cavity with an upper opening and a lower opening, the ceramic piece is arranged in the installation cavity and is provided with a pressure hole through, the ceramic piece is connected with the inner wall of the installation cavity in a sealing way, so as to divide the mounting cavity into an upper cavity and a medium channel, a circuit board is mounted at the upper end of the ceramic piece, a pressure sensitive element is mounted on the upper surface of the ceramic piece, and the temperature sensitive element and the conductive element are elastically abutted through an elastic structure so as to enable the temperature sensitive element to be conducted with the conductive element.

Description

Temperature and pressure sensor
Technical Field
The embodiment of the utility model provides a relate to pressure sensor technical field, in particular to temperature pressure sensor.
Background
The temperature and pressure sensor is an integrated sensor and can simultaneously measure the pressure and the temperature of the medium at the same point. Temperature-pressure sensors are suitable for applications in which the medium temperature is measured simultaneously with the pressure measured, for example in the measurement of the pressure and temperature of an automobile air conditioner.
Adopt TO seat installation pressure chip among the prior art usually, and the probe of TO seat need seal through glass insulator usually, and glass insulator seals and produces the microcrack easily under high temperature, and hot matching nature is poor, influences temperature pressure sensor's leakproofness, the phenomenon of weeping or gas leakage appears even easily, and the TO seat is withstand voltage little by glass insulating sealing's influence.
SUMMERY OF THE UTILITY MODEL
An embodiment of the utility model is to provide a temperature pressure sensor aims at solving temperature pressure sensor hot matching nature under the high temperature poor, the leakproofness is not good, withstand voltage little etc. the problem.
In order to solve the above technical problem, an embodiment of the present invention provides a temperature and pressure sensor, including:
a housing having a mounting cavity with an upper opening and a lower opening;
the ceramic piece is arranged in the installation cavity and provided with a pressure hole in a penetrating mode, and the ceramic piece is connected with the inner wall of the installation cavity in a sealing mode so as to divide the installation cavity into an upper cavity and a medium channel;
the circuit board is arranged at the upper end of the ceramic piece;
the pressure sensitive element is arranged on the upper surface of the ceramic piece, covers the pressure hole and is electrically connected with the circuit board;
one end of the conductive element is electrically connected with the circuit board, and the other end of the conductive element penetrates through the ceramic piece and is welded and sealed with the ceramic piece; and the number of the first and second groups,
the temperature sensitive element is elastically abutted with the conductive element through an elastic structure so as to be conducted with the conductive element.
The utility model has the advantages that the ceramic piece is arranged, the pressure sensitive element is directly arranged on the ceramic piece, the thermal expansion matching between the ceramic piece and the pressure sensitive element is good, the performance is stable, and meanwhile, the ceramic piece and the conductive element are welded and sealed, compared with the traditional glass insulator sealing, the air leakage is not easy to occur, and the pressure resistance is large; because temperature sensing element and conductive element if adopt the welding, the solder joint is too big, and welds unstably, the utility model discloses a temperature sensing element and conductive element elasticity butt are so that temperature sensing element and conductive element switch on, connect more simply, account for the space little, and the elasticity butt makes to connect more stably.
Preferably, the elastic structure comprises a conductive elastic sheet, one end of the conductive elastic sheet is elastically abutted to the other end of the conductive element, and the other end of the conductive elastic sheet is electrically connected with the temperature sensitive element.
Preferably, the conductive elastic sheet comprises an abutting section extending obliquely upwards and a connecting section extending downwards from the abutting section, the abutting section is elastically abutted with the conductive element, and the connecting section is electrically connected with the temperature sensitive element;
the elastic structure further comprises an insulating seat, an installation groove with an upward opening is formed in the upper end of the insulating seat, and the abutting section is accommodated in the installation groove.
Preferably, the insulating base is provided with a clamping portion, and the clamping portion is clamped in the pressure hole and in interference fit with the inner wall of the pressure hole.
Preferably, the clamping portion comprises a plurality of protruding portions which extend upwards from the insulating base, the plurality of protruding portions are provided with installation centers, and each protruding portion is upwards far away from the installation centers and extends obliquely.
Preferably, the lower surface of the ceramic piece is provided with a metal layer on the periphery of the conductive element, and the conductive element is in brazing and sealing connection with the ceramic piece on the metal layer.
Preferably, the conductive element is a metal probe, the ceramic part is provided with a yielding hole, and the metal probe penetrates through the yielding hole.
Preferably, the pressure sensitive element is a pressure chip.
Preferably, a protective sleeve is installed at an opening at the lower end of the shell;
the temperature sensitive element extends out of the lower end opening of the mounting cavity and is accommodated in the protective sleeve.
Preferably, a plurality of air vents are arranged on the protective sleeve in a penetrating manner.
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 temperature and pressure sensor provided by the present invention;
FIG. 2 is an exploded view of FIG. 1;
FIG. 3 is a cross-sectional view of FIG. 1;
FIG. 4 is a partial schematic view of one embodiment of the protective sheath of FIG. 1;
FIG. 5 is a partial schematic view of an embodiment of a portion of the structure of FIG. 1;
FIG. 6 is an exploded view of FIG. 5;
FIG. 7 is an exploded view of a portion of the structure of FIG. 6;
FIG. 8 is a partial schematic view of an embodiment of the insulator base of FIG. 7;
fig. 9 is a cross-sectional view of fig. 8.
The utility model discloses the drawing reference number explains:
reference numerals Name (R) Reference numerals Name (R)
100 Temperature and pressure sensor 711 Abutting section
1 Shell body 712 Connecting segment
11 Mounting cavity 72 Insulating seat
2 Ceramic element 721 Mounting groove
21 Pressure hole 722 Clamping part
22 Hole of stepping down 7221 Protruding part
3 Circuit board 723 First channel
4 Pressure sensitive element 724 Clamping groove
5 Conductive element 8 Protective sleeve
51 Metal probe 81 Vent port
6 Temperature sensitive element 82 Snap-in part
7 Elastic structure 9 Terminal button
71 Conductive spring plate 10 Sealing ring
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.
Fig. 1 to 9 show schematic diagrams of a temperature and pressure sensor provided by the present invention, please refer to fig. 1 to 3, the present invention provides a temperature and pressure sensor 100, the temperature and pressure sensor 100 includes a housing 1, a ceramic member 2, a circuit board 3, a pressure sensing element 4 (in this embodiment, the pressure sensing element 4 is a pressure chip), a conductive element 5, and a temperature sensing element 6 (in this embodiment, the temperature sensing element 6 is a temperature sensor), the housing 1 has an installation cavity 11 with an upper opening and a lower opening, the ceramic member 2 is disposed in the installation cavity 11 and penetrates through a pressure hole 21, the ceramic member 2 is hermetically connected with an inner wall of the installation cavity 11 to divide the installation cavity 11 into an upper cavity and a medium channel, the circuit board 3 is mounted at an upper end of the ceramic member 2, the pressure sensing element 4 is mounted on an upper surface of the ceramic member 2, and cover the pressure hole 21 and electrically connect with the circuit board 3, one end of the conductive element 5 is electrically connected with the circuit board 3, the other end passes through the ceramic part 2 and is welded and sealed with the ceramic part 2, and the temperature sensitive element 6 is elastically abutted with the conductive element 5 through the elastic structure 7, so that the temperature sensitive element 6 is conducted with the conductive element 5.
The utility model has the advantages that the ceramic part 2 is arranged, the pressure sensitive element 4 is directly arranged on the ceramic part 2, the thermal expansion matching between the ceramic part 2 and the pressure sensitive element 4 is good, the performance is stable, meanwhile, the ceramic part 2 and the conductive element 5 are welded and sealed, compared with the traditional sealing method using a glass insulator, the air leakage is not easy to occur, and the pressure resistance is large; because temperature sensing element 6 and conductive element 5 are if adopting the welding, the solder joint is too big, and welds unstably, the utility model discloses a temperature sensing element 6 and conductive element 5 elasticity butt so that temperature sensing element 6 and conductive element 5 switch on, connect simpler and easier, account for the space little, and elasticity butt makes to connect more stably.
When detecting the temperature and the pressure, after a measured medium (in the present embodiment, the temperature and pressure sensor 100 is an air conditioner temperature sensor, and the measured medium is air) enters the medium channel, the temperature is sensed by the temperature sensing element 6, and the measured medium entering the pressure hole 21 through the medium channel contacts with the back surface of the pressure sensing element 4, so that the pressure is sensed by the pressure sensing element 4.
The elastic structure 7 may be disposed in various forms, for example, a conductive sheet is disposed on the elastic element, the conductive sheet is elastically abutted to the other end of the conductive element 5 through the elastic element, and the conductive sheet is electrically connected to the temperature sensitive element 6, in other embodiments, referring to fig. 5 to 7, the elastic structure 7 may also include a conductive elastic sheet 71, one end of the conductive elastic sheet 71 is elastically abutted to the other end of the conductive element 5, and the other end of the conductive elastic sheet is electrically connected to the temperature sensitive element 6, specifically, the conductive elastic sheet 71 includes an abutting section 711 extending obliquely upward and a connecting section 712 extending downward from the abutting section 711, the abutting section 711 is elastically abutted to the conductive element 5, and the connecting section 712 is electrically connected to the temperature sensitive element 6. In order to facilitate the installation of the conductive elastic sheet 71, the elastic structure 7 further includes an insulating base 72, an installation groove 721 with an upward opening is formed at the upper end of the insulating base 72, and the abutting section 711 is accommodated in the installation groove 721, so that the dislocation, the offset and the like can be prevented. In the present embodiment, the insulating base 72 is a plastic part. Specifically, the insulating base 72 is penetrated with a first passage 723 opposite to the pressure hole 21 for passing the measured medium and flowing into the pressure hole 21.
During the installation, insulating seat 72 is fixed with 2 joint of ceramic part, specifically, have joint portion 722 on the insulating seat 72, joint portion 722 card is established in the pressure port 21 and with the inner wall interference fit of pressure port 21. In this embodiment, the clamping portion 722 includes a plurality of protruding portions 7221 that form from insulating seat 72 extends upwards, a plurality of protruding portions 7221 are formed with the installation center, every protruding portion 7221 keeps away from upwards the installation center slope extends, so, can be interference fit after a plurality of protruding portions 7221 are gone into pressure hole 21, be difficult for deviating from. Wherein, the installation center may be a central position surrounded by the plurality of protrusions 7221.
The ceramic member 2 and the conductive element 5 may be welded by providing a metal layer (in this embodiment, the metal layer is a tin-plated layer) on the lower surface of the ceramic member 2 at the periphery of the conductive element 5, and soldering the conductive element 5 to the ceramic member 2 at the metal layer for sealing. In this embodiment, the conductive element 5 is a metal probe 51, the ceramic part 2 is provided with a yielding hole 22, and the metal probe 51 passes through the yielding hole 22. A metal layer may be provided at the outer edge of the relief hole 22 such that the conductive element 5 is solder-sealed to the connection terminal at the metal layer.
In order to protect the temperature sensitive element 6, please refer to fig. 3 and 4, a protective sleeve 8 is installed at the lower opening of the housing 1; the temperature sensitive element 6 extends out of the lower end opening of the mounting cavity 11 and is accommodated in the protective sleeve 8. Furthermore, a plurality of vent holes 81 are arranged on the protective sleeve 8 in a penetrating manner, and the detected medium is directly contacted with the temperature sensitive element 6 through the vent holes 81, so that the detected temperature is more direct and accurate. For the convenience of installation, the protection cover 8 is snap-fitted with the insulation seat 72, in this embodiment, please refer to fig. 3, 8 and 9, one of the periphery of the insulation seat 72 and the protection cover 8 is provided with a snap-in groove 724, and the other is provided with a snap-in portion 82 for snap-fitting with the snap-in groove 724.
Referring to fig. 1 to 3, the temperature and pressure sensor 100 further includes a terminal 9, and the terminal 9 may be a terminal 9 conventional in the art, which is not limited herein. The terminal 9 is a plastic member in this embodiment, and thus can resist various chemicals.
The bottom wall of the mounting cavity 11 is recessed towards the direction close to the medium channel to form a groove, and the bottom wall of the groove is hermetically arranged with the lower end of the ceramic part 2. In this embodiment, a sealing ring 10 may be disposed between the bottom wall of the groove and the lower end of the ceramic part 2, the sealing ring 10 is sealed, the sealing ring 10, the lower end of the ceramic part 2 and the bottom wall of the groove are surrounded to form a cavity, and the other end of the conductive element 5 is accommodated in the cavity, so that when a medium to be measured enters the pressure hole 21 from the medium passage, the medium to be measured is prevented from leaking and separates the front surface and the back surface of the pressure sensitive element 4.
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 temperature-pressure sensor, comprising:
a housing having a mounting cavity with an upper opening and a lower opening;
the ceramic piece is arranged in the installation cavity and provided with a pressure hole in a penetrating mode, and the ceramic piece is connected with the inner wall of the installation cavity in a sealing mode so as to divide the installation cavity into an upper cavity and a medium channel;
the circuit board is arranged at the upper end of the ceramic piece;
the pressure sensitive element is arranged on the upper surface of the ceramic piece, covers the pressure hole and is electrically connected with the circuit board;
one end of the conductive element is electrically connected with the circuit board, and the other end of the conductive element penetrates through the ceramic piece and is welded and sealed with the ceramic piece; and the number of the first and second groups,
the temperature sensitive element is elastically abutted with the conductive element through an elastic structure so as to be conducted with the conductive element.
2. The temperature-pressure sensor of claim 1, wherein the elastic structure comprises a conductive elastic sheet, one end of the conductive elastic sheet is elastically abutted against the other end of the conductive element, and the other end of the conductive elastic sheet is electrically connected with the temperature sensitive element.
3. The temperature and pressure sensor according to claim 2, wherein the conductive elastic piece comprises an abutting section extending obliquely upwards and a connecting section extending downwards from the abutting section, the abutting section is elastically abutted with the conductive element, and the connecting section is electrically connected with the temperature sensitive element;
the elastic structure further comprises an insulating seat, an installation groove with an upward opening is formed in the upper end of the insulating seat, and the abutting section is accommodated in the installation groove.
4. The temperature-pressure sensor as claimed in claim 3, wherein the insulating base has a clamping portion, and the clamping portion is clamped in the pressure hole and is in interference fit with the inner wall of the pressure hole.
5. The temperature-pressure sensor according to claim 4, wherein the engaging portion includes a plurality of protrusions extending upward from the insulating base, the plurality of protrusions forming a mounting center, each of the protrusions extending obliquely upward away from the mounting center.
6. The temperature pressure sensor of claim 1, wherein the lower surface of the ceramic element is provided with a metal layer on the periphery of the conductive element, and the conductive element is soldered to the ceramic element at the metal layer in a sealed connection.
7. The temperature-pressure sensor as claimed in claim 1, wherein the conductive element is a metal probe, and the ceramic member has a hole formed therein, and the metal probe is disposed through the hole.
8. The temperature pressure sensor of claim 1, wherein the pressure sensitive element is a pressure chip.
9. The temperature-pressure sensor according to claim 1, wherein a protective cover is installed at the lower end opening of the housing;
the temperature sensitive element extends out of the lower end opening of the mounting cavity and is accommodated in the protective sleeve.
10. The temperature and pressure sensor of claim 9, wherein a plurality of vents are disposed through the protective sleeve.
CN202023056443.2U 2020-12-17 2020-12-17 Temperature and pressure sensor Active CN214010393U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202023056443.2U CN214010393U (en) 2020-12-17 2020-12-17 Temperature and pressure sensor

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202023056443.2U CN214010393U (en) 2020-12-17 2020-12-17 Temperature and pressure sensor

Publications (1)

Publication Number Publication Date
CN214010393U true CN214010393U (en) 2021-08-20

Family

ID=77312491

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202023056443.2U Active CN214010393U (en) 2020-12-17 2020-12-17 Temperature and pressure sensor

Country Status (1)

Country Link
CN (1) CN214010393U (en)

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