CN205940851U - Be used for detecting hydraulic pressure sensor - Google Patents
Be used for detecting hydraulic pressure sensor Download PDFInfo
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- CN205940851U CN205940851U CN201620794332.6U CN201620794332U CN205940851U CN 205940851 U CN205940851 U CN 205940851U CN 201620794332 U CN201620794332 U CN 201620794332U CN 205940851 U CN205940851 U CN 205940851U
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Abstract
The utility model provides a be used for detecting hydraulic pressure sensor, pressure sensor includes shell, equipment shell spare, silicon oil, pressure diaphragm and pressure sensing unit, through encapsulating the pressure diaphragm inside the shell for block the space intercommunication of the space that is equipped with pressure sensing unit and silicon oil and holding liquid medium, form an at least water conservancy diversion hole and a limit stop between pressure diaphragm and pressure sensing unit, it is back towards water conservancy diversion hole compression to make the pressure diaphragm exerted pressure by the liquid medium, transmit pressure to pressure sensing unit through compression silicon oil, and the pressure diaphragm is restricted the suppressed range by limit stop to excessively exert pressure in pressure sensing unit after resisting the liquid medium inflation. Through aforementioned technical scheme, the utility model provides a current hydraulic pressure pressure sensor be difficult to compromise the technical problem who resists freezing and expansion pressure and protection detecting element, provide the pressure sensor of useful technological effects such as a precision height, good reliability, simple to operate.
Description
Technical field
This utility model is related to signal detecting pressure sensor technique field, relates in particular to one kind and can resist liquid Jie
The pressure transducer of matter freezing and expansion.
Background technology
More and more stricter with the requirement to motor vehicle exhaust emission in the world, many trucies and commercial car manufacturer select to use
SCR (SCR) is reducing the discharge capacity of nitride.Described reducing agent is a kind of 32.5% aqueous solution of urea, urine
Plain aqueous solution can freeze at -11 DEG C, and solid-state volume can pass for urea liquid pressure compared with liquid volume increase about 10%, therefore
One key Design of sensor requires exactly to resist carbamide freezing and expansion.
Installed using elasticity for the anti-freeze design of carbamide pressure transducer is main both at home and abroad at present, and inhaled by foam
Receive expansive force.However, elastic installation method is higher to the selection of mounting material and the design requirement of installation interface, additionally for
The encapsulation design requirement of product is strict, thus increasing the manufacturing cost of elastic installation method；And pass through foam absorbing expansive force
How scheme, select a media compatibility high, and the use of the foam of wide temperature range is then very difficult, and does not have at present
Described foam is had to select in long term reliability experimental verification.
Therefore under aforementioned use demand, being necessary in fact to propose a kind of pressure that can resist liquid medium freezing and expansion
Sensor, to meet actually used demand.
Utility model content
In view of the foregoing, this utility model provides a kind of pressure transducer for detecting hydraulic pressure, aforementioned existing to solve
There is asking by the technology that elasticity installation, elastomeric material or foam absorbing expansive force are led to of urea for vehicle solution pressure sensor
Topic, reaches offer one kind and can be applicable to complex environment, normally to detect corrosivity liquid dielectric fluid pressure, and can be in liquid medium
Still possess the pressure transducer of pressure measuring function after freezing and expansion, be provided simultaneously with high precision, good reliability, easy for installation etc. beneficial
The pressure transducer of technique effect.
For achieving the above object, this utility model adopts the technical scheme that provides a kind of pressure for detecting hydraulic pressure to pass
Sensor, it includes shell and the pressure sensitivity diaphragm, pressure sensitive cells and the silicone oil that are packaged in described enclosure, wherein：One group
Dress shells, is formed with a pressure measurement space and a pressure space inside described enclosure, described assembling shells；Described pressure measurement
The top seal in space and bottom are provided with least one pod apertures, the perisporium bottom in described water conservancy diversion hole peripheral and described pressure measurement space it
Between connect formed positive stop；Described pressure space is connected with described pod apertures, in order to house liquid medium to be detected；Described pressure
Sense diaphragm, group is located between described pressure measurement space and described pressure space, and blocks described pod apertures with described pressure space even
Logical, and form a compression stroke between described pressure sensitivity diaphragm and described positive stop；Described pressure sensitive cells, by being installed on
The top in described pressure measurement space；Described silicone oil, is filled in described pressure measurement space, described pod apertures and described compression stroke, with
Transmit described pressure when described pressure sensitivity diaphragm is bestowed pressure and compressed described compression stroke by liquid medium quick to described pressure
Sense unit.
Therefore this utility model passes through to shape described limiting block between described pressure sensitivity diaphragm and described pressure sensitive cells
Block, reaches when normality uses, can carry out signal detecting to liquid medium, and after liquid medium freezing and expansion, using institute
State positive stop gear and compress sense diaphragm excess compression damage pressure sensitive cells, reach the pressure measuring function maintaining pressure transducer
Technique effect.
This utility model is used for detecting further improvement is that of the pressure transducer of hydraulic pressure, the pressure measurement of described assembling shells
Space has a perisporium encloses to set and is formed, described pressure measurement space bottom be provided with described at least one pod apertures, described water conservancy diversion hole peripheral with
Connect between described perisporium bottom and form described positive stop, and described pressure measurement top of space is provided with a capping；Described pressure is empty
Between be formed with a taper enlarging and a pressure mouth collecting formation from described enlarging is connected with described pod apertures；Described pressure sensitivity film
Piece is mounted between described pod apertures and described pressure mouth；Described pressure sensitive cells one end is installed in described capping, separately
One end is placed in described pressure measurement interior volume.
This utility model is used for detecting further improvement is that of the pressure transducer of hydraulic pressure, and described assembling shells has one
Upper-part and a lower component pairing are constituted, and described upper-part is formed with described pressure measurement space and pod apertures, and described lower component shapes
There is described pressure space；The periphery of described pressure sensitivity diaphragm is folded between described upper-part and lower component, to intercept described pressure measurement
Space and pressure space.
This utility model is used for detecting further being improved by of the pressure transducer of hydraulic pressure, described pressure sensitivity diaphragm is not
Rust steel diaphragm, have centrally located pressure sensitivity portion, be formed in periphery joint portion and connect described pressure sensitivity portion with described
The deformations of joint portion, described joint portion is configured to membrane structure, and the thickness in described pressure sensitivity portion is more than described joint portion；Order is described
Joint portion is folded between described upper-part and lower component, and to intercept described pressure measurement space and pressure space, described pressure sensitivity portion leads to
The pressure effect crossing described deformations deformation to produce with described liquid medium is recessed or is pressed on described positive stop.
It is material and the structure passing through pressure sensitivity diaphragm with this utility model, can be used in detection and there is corrosivity liquid medium
Pressure, when guaranteeing that pressure sensitivity diaphragm is subject to liquid medium pressure to act on, can compress silicone oil, by pressure transmission to pressure simultaneously really
Power sensing unit.
This utility model is used for detecting further improvement is that of the pressure transducer of hydraulic pressure, described pressure sensitive cells are led to
Cross holding wire and positive electrical connector negative electrical connector is connected with a signal processing unit；Described pressure sensitive cells are passed through to be subject to
Swaging becomes generation one stress, and the converted resistance information that formed of described stress exports to described signal processing unit, makes described letter
Number processing unit receives described resistance information and described information is amplified process, with output performance curve.
This utility model is used for detecting further being improved by of the pressure transducer of hydraulic pressure, described pressure sensitive cells
There is binary signal line be connected with a positive electrical connector and a negative electrical connector；Described positive electrical connector negative electrical connector
Place described capping, one end is placed in described pressure measurement interior volume and is connected with described pressure sensitive cells by described holding wire,
The other end passes to described pressure measurement outside, and described positive and negative electric connector is connect with described lidstock group.
Therefore this utility model is assembled in described capping by the sealing of described pressure sensitive cells, has and avoid silicone oil
Reveal the technique effect of impact pressure sensing result.
This utility model is used for detecting further being improved by of the pressure transducer of hydraulic pressure, described shell is provided with one group
If mouth and form in the described group of defining flange setting mouthful inwall, described defining flange has a relative upper ring surface and once ring
Face；Described assembling shells the week side of boss is formed with an installation portion, and described installation portion is placed in described group and sets mouthful inwall and described limit convex
Under edge, anchor ring connects in the space being formed；Described signal processing unit is arranged on the upper ring surface of described defining flange, and is provided with
Two point is connected with described positive electrical connector and described negative electrical connector.
Therefore this utility model passes through the combination package assembly of aforementioned pressure sensing unit and shell, assembling shells, have
Easy for installation and effectively utilizes space, reduction pressure transducer overall volume have technique effect.
This utility model is used for detecting further improvement is that of the pressure transducer of hydraulic pressure, and described assembling shells is provided with many
Several pod apertures.
The pod apertures of this utility model pressure transducer specifically can depending on actually used demand carry out size, set location and
Quantitative adjustment, to coordinate the parameters such as different detection environment or liquid medium viscosity, to obtain the state that is most preferably suitable for.
Therefore the pressure transducer being provided by aforementioned this utility model, described pressure transducer is in liquid medium low temperature
When icing expands, it is highly resistant to the bulbs of pressure, the state of the inner sense element that will not be damaged, and work as freezing and expansion
After the pressure releases causing, described pressure transducer remain to normal work it is ensured that pressure transducer detection when precision,
Reliability, have simultaneously structure simplify, the small volume and Advantageous Effects such as be easily installed.
Brief description
Fig. 1 is used for detecting the pressure sensor structure cross-sectional schematic of hydraulic pressure for this utility model.
Fig. 2 be this utility model Fig. 1 dotted line frame in the amplification in pressure transducer normal work for the partial structurtes illustrate
Figure.
Fig. 3 be this utility model Fig. 1 dotted line frame in the amplification when pressure is excessive or liquid medium expands for the partial structurtes
Schematic diagram.
Fig. 4 is first embodiment (macropore) the structure cross-sectional schematic of this utility model pressure transducer upper housing part.
Fig. 5 is second embodiment (aperture) the structure cross-sectional schematic of this utility model pressure transducer upper housing part.
Fig. 6, Fig. 7 are 3rd embodiment (porous) the structure cross-sectional schematic of this utility model pressure transducer upper housing part.
Reference is as follows with the corresponding relation of part：
10 is shell；11 is that group sets mouth；12 is defining flange；121 is upper ring surface；122 is lower anchor ring；20 is assembling shell
Part；201 is upper-part；202 is lower component；21 is pressure measurement space；211 is perisporium；23 is positive stop；24 is capping；25 are
Pressure space；251 is enlarging；252 is pressure mouth；26 is compression stroke；27 is installation portion；30 is silicone oil；40 is pressure sensitivity diaphragm；
41 is pressure sensitivity portion；42 is joint portion；43 is deformations；50 is pressure sensitive cells；51 is holding wire；52 is that positive electrical patches
Part；53 is negative electrical connector；60 is signal processing unit；61 is contact.
Specific embodiment
For the benefit of to understanding of the present utility model, illustrate below in conjunction with drawings and Examples.
Refer to Fig. 1 to Fig. 7, this utility model provides a kind of pressure transducer for detecting hydraulic pressure, described pressure passes
Sensor may be particularly used for detecting the hydraulic pressure of liquid medium, it may happen that the liquid medium of icing conditions when particularly relating to use,
Such as urea for vehicle solution.
Described pressure transducer includes shell 10, assembling shells 20, silicone oil 30, pressure sensitivity diaphragm 40, pressure sensitive cells 50
And signal processing unit 60.Wherein：
As shown in figure 1, in order to contain liquid medium inside described shell 10, described shell 10 be provided with one group set mouth 11 and
Form in the described group of defining flange 12 setting mouth 11 inwall, described defining flange 12 has a relative upper ring surface 121 and once
Anchor ring 122, sets described signal processing unit 60 and described assembling shells 20 in order to group.
Described assembling shells 20, inside described shell 10, is formed with a pressure measurement space 21 inside described assembling shells 20
And one pressure space 25；Described pressure measurement space 21 has a perisporium 211 encloses to set and is formed, and described pressure measurement space 21 bottom is provided with least
One pod apertures 22, are connected formation positive stop 23 between described pod apertures 22 periphery and described perisporium 211 bottom, and described pressure measurement
Space 21 top is provided with a capping 24；Described pressure space 25 is formed with a taper enlarging 251 and and receives from described enlarging 251
The pressure mouth 252 that bundle is formed is connected with described pod apertures 22, in order to liquid medium to be detected is drained to described enlarging 251 to pressure
Sense diaphragm 40 applies pressure.
In the present embodiment, described assembling shells 20 the week side of boss is formed with an installation portion 27, and described installation portion 27 is placed in institute
State group set mouth 11 inwall be connected with described 12 times anchor rings of defining flange 122 formed space in.
Additionally, described assembling shells 20 has a upper-part 201 and a lower component 202 pairing is constituted, described upper-part 201
It is formed with described pressure measurement space 21 and pod apertures 22, described lower component 202 is formed with described pressure space 25.
Described pressure sensitivity diaphragm 40 is rustless steel diaphragm, and group is located at the pressure in described pressure measurement space 21 and described pressure space 25
Between mouthfuls 252, and block described pod apertures 22 and connect with described pressure space 25, and described pressure sensitivity diaphragm 40 and described limiting block
Form a compression stroke 26 between block 23.Specifically, described pressure sensitivity diaphragm 40 has centrally located pressure sensitivity portion 41, shapes
In the deformations 43 of the joint portion 42 of periphery and the described pressure sensitivity portion of connection 41 and described joint portion 42, described joint portion 42 shapes
For membrane structure, the thickness in described pressure sensitivity portion 41 is more than described joint portion 42；Described joint portion 42 is made to be folded in described upper-part
Between 201 and lower component 202, to intercept described pressure measurement space 21 and pressure space 25, described pressure sensitivity portion 41 is by described deformation
Portion 43 deforms is recessed with the pressure effect producing with described urea liquid or presses on described positive stop 23.
Described pressure sensitive cells 50 are placed in inside described pressure measurement space 21 by being installed in described capping 24.Tool
Body ground, described pressure sensitive cells 50 have binary signal line 51 and a positive electrical connector 52 and a negative electrical connector 53 connects
Connect；Described positive electrical connector 52, negative electrical connector 53 place described capping 24, and one end is placed in described pressure measurement space 21
Portion is connected with described pressure sensitive cells 50 by described holding wire 51, and the other end passes to described pressure measurement space 21, and
Described positive and negative electric connector 52,53 is connect with described capping 24 sealing groups.
In the present embodiment, described pressure sensitive cells 50 by described holding wire 51 and described positive electrical connector 52,
Described negative electrical connector 53 is connected with a signal processing unit 60；Described pressure sensitive cells 50 produce one by pressurized deformation
Stress, the converted resistance information that formed of described stress exports to described signal processing unit 60, makes described signal processing unit
The 60 described resistance information of reception simultaneously are amplified to described information processing, with output performance curve.Wherein, described signal processing list
Unit 60 is arranged on defining flange 12 upper ring surface 121 of described shell 10, and is provided with two point 61 and described positive electrical connector
52 and described negative electrical connector 53 connect.
Described silicone oil 30 is to be filled in described pressure measurement space 21, described pod apertures 22 and described compression stroke 26, with
Described pressure sensitivity diaphragm 40 is bestowed pressure and compressed and transmit described pressure during described compression stroke 26 to described pressure by liquid medium
Sensing unit 50.
It is explained above this utility model for detecting the concrete structure of the pressure transducer of hydraulic pressure, below please answer with Fig. 1
Cooperation refers to Fig. 2, Fig. 3, and the method that this utility model pressure transducer resists liquid freezing and expansion pressure is described.Methods described walks
Rapid inclusion：
There is provided a pressure transducer, it includes shell 10 and is packaged in pressure sensitivity diaphragm 40 within described shell 10, pressure
Power sensing unit 50 and silicone oil 30；
Described pressure sensitivity diaphragm 40 is encapsulated in inside shell 10, is provided with described pressure sensitive cells 50 and described in order to block
The space of silicone oil 30 is connected with the space housing liquid medium to be detected；
Form at least one pod apertures 22 and limiting block between described pressure sensitivity diaphragm 40 and described pressure sensitive cells 50
Block 23, makes described pressure sensitivity diaphragm 40 be bestowed before pressure by urea liquid, pod apertures 22 as described in Fig. 2 moves back bottom make compression stroke 26 have
There is the space of larger accommodating silicone oil 30；After described pressure sensitivity diaphragm 40 is bestowed pressure by urea liquid, will lead towards described as Fig. 3
Discharge orifice 22 compresses, and the silicone oil 30 that script is contained in compression stroke 26 compresses toward pressure measurement space 21 via pod apertures 22, is formed
Pressure transmission to pressure measurement space 21 silicone oil 30 so that be transferred to described pressure sensitive cells 50 be detected；And described pressure sensitivity diaphragm
40 are limited suppressed range by described positive stop 23, excessively apply pressure to pressure sensitive cells to resist after described urea liquid expands
50.
Further, in the present embodiment, the size of described pod apertures 22 is the pressure being produced according to described urea liquid
Depending on the viscosity of scope and temperature and described silicone oil 30；The shaping position of described positive stop 23 is according to described pressure sensitivity diaphragm
Depending on 40 normal work stroke；The thickness of described positive stop 23 be according to described urea liquid produce pressure limit and
Fixed.
The pod apertures 22 that this utility model assembles shells 20 can be as shown in figure 4, by pod apertures 22 located at pressure measurement space
The centre of 21 bottoms, and it is configured to the pore structure of large-size, to be applied to the larger not runny liquid medium of viscosity；Or
Person it is also possible to as shown in figure 5, pod apertures 22 are configured to the pore structure of reduced size, be applied to viscosity less it is easy to flowing
Liquid medium.
Again as shown in Figure 6, Figure 7, the quantity of described pod apertures 22 can be multiple, and set location can also be regularly arranged
Or irregular alignment, and the size in hole can be configured to capillary dimensions depending on use demand adjustment.
Above in association with drawings and Examples, this utility model is described in detail, those skilled in the art can
According to the above description this utility model is made with many variations example.Thus, some details in embodiment should not be constituted to this reality
With new restriction, this utility model is by the scope being defined using appended claims as protection domain of the present utility model.
Claims (9)
1. a kind of pressure transducer for detecting hydraulic pressure, the pressure sensitivity diaphragm including shell and being packaged in described enclosure,
Pressure sensitive cells and silicone oil it is characterised in that：
One assembling shells, is formed with a pressure measurement space and a pressure space inside described enclosure, described assembling shells；
The top seal in described pressure measurement space and bottom are provided with least one pod apertures, the week in described water conservancy diversion hole peripheral and described pressure measurement space
Connect between wall bottom and form positive stop；Described pressure space is connected with described pod apertures, is situated between in order to accommodating liquid to be detected
Matter；
Described pressure sensitivity diaphragm, group is located between described pressure measurement space and described pressure space, and block described pod apertures with described
The connection of pressure space, and form a compression stroke between described pressure sensitivity diaphragm and described positive stop；
Described pressure sensitive cells, by being installed on the top in described pressure measurement space；
Described silicone oil, is filled in described pressure measurement space, described pod apertures and described compression stroke, with described pressure sensitivity diaphragm quilt
Described liquid medium is bestowed pressure compressing and is transmitted described pressure during described compression stroke to described pressure sensitive cells.
2. the pressure transducer for detecting hydraulic pressure according to claim 1 it is characterised in that：
The pressure measurement space of described assembling shells has a perisporium and encloses to set and formed, described pressure measurement space bottom be provided with described at least one lead
Discharge orifice, is connected the described positive stop of formation between described water conservancy diversion hole peripheral and described perisporium bottom, and described pressure measurement top of space
It is provided with a capping；Described pressure spatial shaping have a taper enlarging and one from described enlarging collect the pressure mouth of formation with described
Pod apertures connect；
Described pressure sensitivity diaphragm is mounted between described pod apertures and described pressure mouth；
Described pressure sensitive cells one end is installed in described capping, and the other end is placed in described pressure measurement interior volume.
3. the pressure transducer for detecting hydraulic pressure according to claim 1 and 2 it is characterised in that：
Described assembling shells has a upper-part and a lower component pairing and constitutes, described upper-part be formed with described pressure measurement space and
Pod apertures, described lower component is formed with described pressure space；
The periphery of described pressure sensitivity diaphragm is folded between described upper-part and lower component, empty to intercept described pressure measurement space and pressure
Between.
4. the pressure transducer for detecting hydraulic pressure according to claim 3 it is characterised in that：
Described pressure sensitivity diaphragm is rustless steel diaphragm, have centrally located pressure sensitivity portion, be formed in periphery joint portion and
Connect the deformations in described pressure sensitivity portion and described joint portion, described joint portion is configured to membrane structure, the thickness in described pressure sensitivity portion
More than described joint portion；Make described joint portion be folded between described upper-part and lower component, with intercept described pressure measurement space and
Pressure space, described pressure sensitivity portion passes through described deformations deformation and recesses with the pressure effect that described liquid medium produces or compress
In described positive stop.
5. the pressure transducer for detecting hydraulic pressure according to claim 1 it is characterised in that：
Described pressure sensitive cells pass through holding wire and positive electrical connector, negative electrical connector and a signal processing unit connect
Connect；Described pressure sensitive cells produce a stress by pressurized deformation, described stress is converted formed a resistance information export to
Described signal processing unit, makes described signal processing unit receive described resistance information and described information is amplified process,
With output performance curve.
6. the pressure transducer for detecting hydraulic pressure according to claim 2 it is characterised in that：
Described pressure sensitive cells pass through holding wire and positive electrical connector, negative electrical connector and a signal processing unit connect
Connect；Described pressure sensitive cells produce a stress by pressurized deformation, described stress is converted formed a resistance information export to
Described signal processing unit, makes described signal processing unit receive described resistance information and described information is amplified process,
With output performance curve.
7. the pressure transducer for detecting hydraulic pressure according to claim 6 it is characterised in that：
Described pressure sensitive cells are had binary signal line and are connected with a positive electrical connector and a negative electrical connector；Described positive electricity
Gas connector, negative electrical connector place described capping, one end be placed in described pressure measurement interior volume pass through described holding wire with
Described pressure sensitive cells connect, and the other end passes to described pressure measurement outside, and described positive and negative electric connector with described
Lidstock group connects.
8. the pressure transducer for detecting hydraulic pressure according to claim 5 or 6 it is characterised in that：
Described shell is provided with one group and sets mouth and form in the described group of defining flange setting mouthful inwall, and described defining flange has phase
To a upper ring surface and once anchor ring；
Described assembling shells the week side of boss is formed with an installation portion, and described installation portion is placed in described group and sets mouthful inwall and described limit convex
Under edge, anchor ring connects in the space being formed；
Described signal processing unit is arranged on the upper ring surface of described defining flange, and is provided with two point and patches with described positive electrical
Part and described negative electrical connector connect.
9. the pressure transducer for detecting hydraulic pressure according to claim 1 and 2 it is characterised in that：
Described assembling shells is provided with how several pod apertures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620794332.6U CN205940851U (en) | 2016-07-27 | 2016-07-27 | Be used for detecting hydraulic pressure sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620794332.6U CN205940851U (en) | 2016-07-27 | 2016-07-27 | Be used for detecting hydraulic pressure sensor |
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| Publication Number | Publication Date |
|---|---|
| CN205940851U true CN205940851U (en) | 2017-02-08 |
Family
ID=57926470
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620794332.6U Active CN205940851U (en) | 2016-07-27 | 2016-07-27 | Be used for detecting hydraulic pressure sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124116A (en) * | 2016-07-27 | 2016-11-16 | 安费诺(常州)连接系统有限公司 | For detecting pressure transducer and the method for opposing liquid freezing and expansion pressure thereof of hydraulic pressure |
| CN109931708A (en) * | 2019-02-27 | 2019-06-25 | 珠海格力电器股份有限公司 | Water system and its method for heating and controlling, computer readable storage medium |
| CN110763395A (en) * | 2019-10-30 | 2020-02-07 | 南京高华科技股份有限公司 | Pressure measuring device |
| CN111365220A (en) * | 2018-12-26 | 2020-07-03 | 东北大学 | Internal flow field parameter testing system of vacuum dry pump |
-
2016
- 2016-07-27 CN CN201620794332.6U patent/CN205940851U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106124116A (en) * | 2016-07-27 | 2016-11-16 | 安费诺(常州)连接系统有限公司 | For detecting pressure transducer and the method for opposing liquid freezing and expansion pressure thereof of hydraulic pressure |
| CN111365220A (en) * | 2018-12-26 | 2020-07-03 | 东北大学 | Internal flow field parameter testing system of vacuum dry pump |
| CN109931708A (en) * | 2019-02-27 | 2019-06-25 | 珠海格力电器股份有限公司 | Water system and its method for heating and controlling, computer readable storage medium |
| CN109931708B (en) * | 2019-02-27 | 2020-06-02 | 珠海格力电器股份有限公司 | Water supply system, heating control method thereof, and computer-readable storage medium |
| CN110763395A (en) * | 2019-10-30 | 2020-02-07 | 南京高华科技股份有限公司 | Pressure measuring device |
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