CN217687308U

CN217687308U - Temperature and pressure integrated sensor with glass micro-melting core body applied to low-pressure environment

Info

Publication number: CN217687308U
Application number: CN202221083949.9U
Authority: CN
Inventors: 周惠明; 薛鹏
Original assignee: CHANGZHOU HUICHANG SENSOR CO LTD
Current assignee: CHANGZHOU HUICHANG SENSOR CO LTD
Priority date: 2022-05-07
Filing date: 2022-05-07
Publication date: 2022-10-28
Anticipated expiration: 2032-05-07

Abstract

The utility model discloses a glass melts a core a little and is applied to integrative sensor of warm pressure of low pressure environment, its technical scheme main points are, through setting up glass melts a pressure core a little, utilizes the pressure foil gage on the glass melts a core a little to warp the principle that leads to Wheatstone bridge resistance change and realizes detecting. The functions of the temperature sensor and the pressure sensor are integrated, so that the space required by the installation of the client can be greatly saved, and the materials of parts can be saved, thereby obtaining higher economic practicability; first sealing washer, second sealing washer and third sealing washer have sealed effect to the junction of sensor, avoid appearing the condition of leaking, have improved the sealed effect of sensor, through setting up interior casing and inner shell upper cover, when the installation terminal casing, can install terminal casing in the inner shell, realize the installation of terminal casing dual casing, sealed effect to the sensor is better.

Description

Temperature and pressure integrated sensor with glass micro-melting core body applied to low-pressure environment

Technical Field

The utility model relates to a sensor field, in particular to integrative sensor of warm-pressing that low pressure environment was applied to glass micro-melting core.

Background

At present, dozens to hundreds of different sensors such as temperature, pressure, gas, rotating speed and the like are installed on a common household car, and most of the sensors are still independently applied, so that the internal structure of the vehicle control system is still complicated;

according to data of a prospective industry research institute, as of 2018, the three types of sensors with the largest scale in the global sensor market are flow sensors, pressure sensors and temperature sensors, which respectively occupy 21%, 19% and 14% of the global sensor market, and provide good market guarantee for developing new temperature and pressure integrated sensors.

The temperature and pressure integrated sensor applied to the low-pressure environment is common in the current market, the pressure core body adopts a plurality of ceramic capacitors or MEMS core bodies, only a few foreign manufacturers can produce the ceramic capacitor core bodies in batches at present, particularly, the ceramic capacitor core bodies in the automobile industry almost occupy monopoly by the Sensa technology, the domestic technology is limited, the market is weak, the MEMS pressure measurement precision is general, the working pressure range is low, the industrial application is far larger than the automobile application, and the product limitation is obvious.

However, with the development of the automobile market in China, particularly the new energy automobile market, the customer demand is more and more obvious, domestic enterprises gradually begin to find new breakthrough points, the glass micro-melting pressure core is more and more widely applied, the domestic technology is relatively mature, and the product reliability is good.

The existing sensor is packaged in a single shell mode, the working environment of the sensor on an automobile is high in temperature and has certain pressure, the single shell type installation sealing effect is poor, and the sensor is easy to damage when pressure leaks.

SUMMERY OF THE UTILITY MODEL

In order to overcome the not enough of prior art, the utility model aims to provide a glass melts a core a little and is applied to the integrative sensor of warm pressure of low pressure environment, has integrateed temperature sensor and pressure sensor's function in an organic whole, can practice thrift required space of customer end installation and saving spare part material greatly to obtain higher economic practicality, saved manufacturing cost, avoided the general and lower phenomenon of operating pressure scope of MEMS pressure measurement precision moreover.

The above technical purpose of the present invention can be achieved by the following technical solutions:

integrative sensor is pressed to little melting core of glass is applied to temperature of low pressure environment, including moulding plastics casing, metal joint and terminal casing, the terminal casing is installed in metal joint's inside, and the casing of moulding plastics is connected with the terminal casing, metal joint's one end is provided with screwed joint, and screwed joint's one end is fixed and is provided with heat conduction silicone grease, and the internally mounted of terminal casing has glass to melt pressure core and FPC + PCB soft and hard combination board subassembly a little, and NTC thermistor is installed to the one end of terminal casing.

By arranging the glass micro-melting pressure core body, the principle that the resistance of the Wheatstone bridge changes due to the deformation of the pressure strain gauge on the glass micro-melting core body is utilized. The functions of the temperature sensor and the pressure sensor are integrated, so that the space required by the installation of the client can be greatly saved, the part materials can be saved, and higher economic practicability can be obtained.

Further, install first sealing washer between casing of moulding plastics and the terminal casing.

Further, a second sealing ring is arranged between the metal joint and the terminal shell.

Further, a third sealing ring is installed on the outer side of the threaded joint.

The first sealing ring, the second sealing ring and the third sealing ring have a sealing effect on the joint of the sensor, so that the leakage is avoided, and the sealing effect of the sensor is improved.

Further, an inner shell is arranged inside the metal joint, the terminal shell is arranged in the inner shell, an inner shell upper cover is arranged at the top of the inner shell through threads,

the middle part of the inner shell upper cover is provided with a threading hole, and the top of the injection molding shell is also provided with a threading hole.

Through setting up interior casing and inner shell upper cover, when installing terminal housing, can install terminal housing in the inner shell, realize the installation to terminal housing's dual casing, better to the sealed effect of sensor, through setting up the through wires hole, installation electric wire that can be very convenient for electric wire and sensor link together.

Furthermore, a threading ring is arranged at the upper end of the threading hole of the inner shell upper cover.

Through the arrangement of the threading ring, the wire can pass through the threading ring, the outer side of the wire is in contact with the inside of the threading ring, the connection part of the wire is protected, and the situation that the line is broken at the connection part when the wire is installed and used is avoided

Further, the rubber ring is installed to the through wires hole inboard of the casing of moulding plastics, and the through wires ring runs through the rubber ring and extends to the top of the casing of moulding plastics.

Through setting up the rubber ring, the rubber ring is located thimble or electric wire and the casing contact site of moulding plastics, has sealed effect, falls into the dust in avoiding moulding plastics the casing.

Furthermore, the outside of thimble is installed the clamping ring through the screw thread.

Through setting up the clamping ring for the bottom of clamping ring contacts with the upper end of the casing of moulding plastics, makes thimble, inner shell upper cover and the casing of moulding plastics connect into a whole, has spacing and the effect of location to the casing, avoids interior casing inside rocking moulding plastics the casing.

Furthermore, set up the opening that the symmetry set up on the thimble, inner shell upper cover one end opening is kept away from to the opening and is less than the one end that is close to the inner shell upper cover, when interlude electric wire, is convenient for to the interlude of electric wire, and the clamping ring is installed equally in the outside of thimble. When the installation clamping ring, the clamping ring downstream's in-process can make the thimble press from both sides tightly gradually, realizes pressing from both sides tight fixed to the electric wire.

To sum up, the utility model discloses following beneficial effect has:

1. the glass micro-melting pressure core is arranged, the temperature detection is realized by utilizing the principle that the resistance of a Wheatstone bridge changes due to the deformation of a pressure strain gauge on the glass micro-melting core, the glass micro-melting core is very mature in domestic technology, the manufacturing cost is reduced, the functions of a temperature sensor and a pressure sensor are integrated, the space required by the installation of a client can be greatly saved, the materials of parts are saved, and higher economic practicability is obtained;

2. the first sealing ring, the second sealing ring and the third sealing ring are arranged to have a sealing effect on the joint of the sensor, so that the leakage is avoided, and the sealing effect of the sensor is improved.

3. Through setting up the clamping ring for the bottom of clamping ring contacts with the upper end of the casing of moulding plastics, connects thimble, inner shell upper cover into a whole with the casing of moulding plastics, fixes the internal casing, avoids the internal casing to rock at the casing of moulding plastics inside.

Drawings

FIG. 1 is a schematic view of an explosive structure in the present embodiment;

FIG. 2 is a front cross-sectional view of the metal fitting, inner housing in this embodiment;

FIG. 3 is a schematic structural view of the inner casing and the upper cover of the inner casing in this embodiment;

FIG. 4 is a cross-sectional view of the injection molded housing and pressure plate of the present embodiment;

fig. 5 is a structural view of the inner casing upper cover and the pressing plate in the present embodiment.

In the drawings, 1, a housing is injection molded; 2. an inner housing; 3. the FPC + PCB soft and hard combined board assembly; 4. a glass micro-melting pressure core; 5. a first seal ring; 6. a terminal housing; 7. an NTC thermistor; 8. a second seal ring; 9. a metal joint; 10. heat-conducting silicone grease; 11. a third seal ring; 12. an inner shell upper cover; 13. pressing a ring; 14. a rubber ring; 15. a threading ring.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

In which like parts are designated by like reference numerals. It should be noted that as used in the following description, the terms "front", "back", "left", "right", "upper" and "lower" refer to directions in the drawings, and the terms "bottom" and "top", "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.

Referring to fig. 1, be the utility model discloses the integrative sensor of temperature and pressure of low pressure environment is applied to glass micro-melting core in the preferred embodiment, including casing 1 of moulding plastics, metal joint 9 and terminal casing 6, terminal casing 6 is installed in the inside of metal joint 9, casing 1 of moulding plastics is connected with terminal casing 6, the one end of metal joint 9 is provided with threaded joint, threaded joint's the fixed heat conduction silicone grease 10 that is provided with of one end, terminal casing 6's internally mounted has glass micro-melting pressure core 4 and FPC + PCB soft and hard combination board subassembly 3, NTC thermistor 7 is installed to terminal casing 6's one end, glass micro-melting pressure core 4, NTC thermistor welds or ties up the line with FPC + PCB soft and hard combination board subassembly 3, the foot position of welded is the same with the foot position in the current sensor, only utilize glass micro-melting pressure core 4 to replace current ceramic capacitor core. The NTC thermistor 7 protrudes into the thermally conductive silicone grease 10, which may protrude directly into the vehicle component.

By arranging the glass micro-melting pressure core 4, the principle that the resistance of the Wheatstone bridge is changed due to the deformation of the pressure strain gauge on the glass micro-melting core is utilized. The glass micro-melting pressure core is adopted, the market application is wide, the measurement precision is high, the reliability is good, and the FPC + PCB soft and hard combination board is adopted, so that the space utilization rate is high, and the operability is good. The core body is connected by adopting a wire bonding process, the response time is fast, the pressure side is less than 10ms, and the temperature side is less than 3S

A first sealing ring 5 is arranged between the injection molding shell 1 and the terminal shell 6. A second sealing ring 8 is arranged between the metal fitting 9 and the terminal housing 6. And a third sealing ring 11 is arranged on the outer side of the threaded joint. The first sealing ring 5, the second sealing ring 8 and the third sealing ring 11 have a sealing effect on the joint of the sensor, so that the leakage is avoided.

In practical use, as the sensor is installed in a single shell, under high temperature and certain environment, the leakage of the shell is easily caused, so that gas enters the sensor, and the sensor is damaged. Moreover, the single-shell type shell has a poor sealing effect, is easy to leak, and is troublesome in manufacturing process.

As shown in fig. 2-3, the metal joint 9 is internally provided with an inner housing 2, the terminal housing 6 is installed in the inner housing 2, one end of the terminal housing 6 passes through the inner housing 2 and extends into the metal joint 9, the inner housing 2 has a sealing effect on the terminal housing 6, and a double-layer installation is adopted, so that the installation effect of internal parts is better. Inner shell upper cover 12 is installed through the screw thread at the top of interior casing 2, and inner shell upper cover 12 closes interior casing 2's top lid, forms sealed space, adopts the installation of two shell type, and the shell is dustproof and preliminary encapsulation, and the inner shell only need preliminary encapsulation, accomplish waterproof sealing can, simplified production process.

The middle part of inner shell upper cover 12 is provided with the through wires hole, and the through wires hole has also been seted up at the top of casing 1 of moulding plastics, and when the installation, the electric wire can pass in the through wires hole to link together with the connecting terminal of FPC + PCB soft and hard combination board subassembly 3, realize the transmission of signal.

The threading ring 15 is installed to the through wires hole upper end of inner shell upper cover 12, and the electric wire can pass from the inside of threading ring 15, and the outside of electric wire is in the same place with the inside contact of threading ring 15, has the effect of protection to the junction of electric wire in addition, avoids when installation and use, and the condition of rupture appears in the junction in the circuit.

In a further embodiment, a rubber ring 14 is installed on the inner side of the threading hole of the injection molding casing 1, the rubber ring 14 is located at the contact position of the threading ring 15 or the electric wire and the injection molding casing 1, the rubber ring 14 has a sealing effect and prevents dust from falling into the rubber ring, and the rubber ring 14 is located and the threading ring 15 penetrates through the rubber ring 14 and extends to the upper side of the injection molding casing 1.

In a further embodiment, as shown in fig. 4-5, a press ring 13 is installed on the outer side of the threading ring 15 by screw threads, and when the threading ring 15 passes through the rubber ring 14 and is located above the injection molding housing 1, the press ring can be screwed downwards, so that the bottom of the press ring 13 contacts with the upper end of the injection molding housing 1, and the threading ring 15, the inner shell upper cover 12 and the injection molding housing are connected into a whole.

In further embodiment, in order to facilitate the interlude to the electric wire, set up the opening that the symmetry set up on the thimble 15, the opening is kept away from the one end opening of inner shell upper cover 12 and is less than the one end that is close to inner shell upper cover 12, when interlude the electric wire, is convenient for to the interlude of electric wire, and the clamping ring 13 is opened moreover has the opening that matches with thimble 15. When the press ring 13 is installed, the press ring 13 is installed at the upper end of the threading ring 15, and then the press ring 13 is screwed so that the press ring 13 moves downward to clamp and fix the electric wire.

And the more the press ring 13 is screwed down, the larger the clamping force between the threading rings 15 is, and the better the clamping effect on the electric wire is.

The specific implementation process comprises the following steps: install interior casing 2 in metal joint 9 when using, then install terminal housing 6 in interior casing 2, then install inner shell upper cover 12 in interior casing 2, encapsulate terminal housing 6, glass microfusion pressure core 4 and FPC + PCB soft and hard combination board subassembly in interior casing 2, then will mould plastics casing 1 and install on metal joint 9, thereby the installation shell, realize double sealing to the sensor, sealed effect is better, and when dismantling the sensor, will mould plastics casing 1 and metal joint 9 separation, can directly take out interior casing.

Can also pass through thimble 15 to the electric wire during installation, then install clamping ring 13 at thimble 15, install thimble 15 and the casing 1 of moulding plastics together for the more stable of thimble 15 and the installation of interior casing 2.

The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. Integrative sensor is pressed to glass micro-melting core body temperature of being applied to low pressure environment, including casing (1), metal joint (9) and terminal casing (6) of moulding plastics, the inside at metal joint (9) is installed in terminal casing (6), and casing (1) of moulding plastics is connected its characterized in that with terminal casing (6): one end of the metal connector (9) is provided with a threaded connector, one end of the threaded connector is fixedly provided with heat-conducting silicone grease (10), a glass micro-melting pressure core body (4) and an FPC + PCB rigid-flexible printed circuit board assembly (3) are mounted inside the terminal shell (6), and an NTC thermistor (7) is mounted at one end of the terminal shell (6).

2. The glass micro-melting core body of claim 1 applied to a temperature and pressure integrated sensor in a low pressure environment, wherein: a first sealing ring (5) is arranged between the injection molding shell (1) and the terminal shell (6).

3. The glass micro-melting core body of claim 1 applied to a temperature and pressure integrated sensor in a low pressure environment, wherein: and a second sealing ring (8) is arranged between the metal joint (9) and the terminal shell (6).

4. The glass micro-melting core body of claim 1 applied to a temperature and pressure integrated sensor in a low pressure environment, wherein: and a third sealing ring (11) is arranged on the outer side of the threaded joint.

5. The glass micro-melting core body of claim 1 applied to a temperature and pressure integrated sensor in a low pressure environment, wherein: an inner shell (2) is arranged in the metal joint (9), the terminal shell (6) is arranged in the inner shell (2), an inner shell upper cover (12) is arranged at the top of the inner shell (2) through threads,

the middle part of the inner shell upper cover (12) is provided with a threading hole, and the top of the injection molding shell (1) is also provided with a threading hole.

6. The glass micro-melting core body of claim 5 applied to a temperature and pressure integrated sensor in a low pressure environment, wherein: the upper end of the threading hole of the inner shell upper cover (12) is provided with a threading ring (15).

7. The glass micro-melting core body of claim 6 applied to a temperature and pressure integrated sensor in a low pressure environment, wherein: rubber ring (14) are installed to the through wires hole inboard of casing (1) of moulding plastics, and through wires ring (15) run through rubber ring (14) and extend the top of casing (1) of moulding plastics.

8. The glass micro-melting core body of claim 7 applied to a temperature and pressure integrated sensor in a low pressure environment, wherein: the outside of thimble (15) is installed clamping ring (13) through the screw thread.

9. The glass micro-melting core body of claim 7 applied to a temperature and pressure integrated sensor in a low pressure environment, wherein: the threading ring (15) is provided with symmetrically arranged openings.