CN107923377A - method for measuring pressure - Google Patents
method for measuring pressure Download PDFInfo
- Publication number
- CN107923377A CN107923377A CN201680042946.1A CN201680042946A CN107923377A CN 107923377 A CN107923377 A CN 107923377A CN 201680042946 A CN201680042946 A CN 201680042946A CN 107923377 A CN107923377 A CN 107923377A
- Authority
- CN
- China
- Prior art keywords
- compressor
- motor
- pressure
- electro
- control device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000000034 method Methods 0.000 title claims abstract description 19
- 230000008859 change Effects 0.000 claims abstract description 8
- 238000007789 sealing Methods 0.000 claims description 6
- 230000008439 repair process Effects 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims 2
- 238000012423 maintenance Methods 0.000 description 8
- 239000000565 sealant Substances 0.000 description 7
- 230000001276 controlling effect Effects 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 238000009530 blood pressure measurement Methods 0.000 description 3
- 230000000875 corresponding effect Effects 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 230000002596 correlated effect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000010354 integration Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012887 quadratic function Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 210000000635 valve cell Anatomy 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/04—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for the means being electric
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B35/00—Piston pumps specially adapted for elastic fluids and characterised by the driving means to their working members, or by combination with, or adaptation to, specific driving engines or motors, not otherwise provided for
- F04B35/06—Mobile combinations
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/06—Control using electricity
- F04B49/065—Control using electricity and making use of computers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B49/00—Control, e.g. of pump delivery, or pump pressure of, or safety measures for, machines, pumps, or pumping installations, not otherwise provided for, or of interest apart from, groups F04B1/00 - F04B47/00
- F04B49/08—Regulating by delivery pressure
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2203/00—Motor parameters
- F04B2203/02—Motor parameters of rotating electric motors
- F04B2203/0201—Current
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04B—POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS
- F04B2205/00—Fluid parameters
- F04B2205/05—Pressure after the pump outlet
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Computer Hardware Design (AREA)
- Control Of Positive-Displacement Pumps (AREA)
Abstract
It is a kind of to be used to measure as by the compressor of electric drive, the method preferably via crank link gear pressure caused by the reciprocating-piston compressor of electric drive, wherein it is determined that the average motor current relevant to the pressure change at blower outlet of the electro-motor of the compressor is driven to change and provide as the parameter proportional with pressure for running the compressor, in the form of input parameter or be shown to control device.
Description
Technical field
The present invention relates to it is a kind of be used for measure by by the compressor of electric drive, preferably via crank link gear quilt
The method of pressure caused by the reciprocating-piston compressor of electric drive.To have in addition, the present invention relates to one kind by electronic horse
Portable light duty compressor up to the compressor of driving, preferably in auxiliary apparatus for repairing for vehicle tyre sealing and
The light duty compressor of pump gas, the light duty compressor have the control device for being used for controlling the auxiliary apparatus for repairing or regulation and control unit.
Background technology
The compressor for example need band be useful for sealing inflatable articles and pump gas, particularly for motor vehicle
Tire carries out the device of sealing and pump gas or the part as the device.These equipment be referred to as " auxiliary apparatus for repairing " or
" maintenance tool bag ".
These portable and devices of lightweight include the compressor unit as compressed air source, additionally have and are used for
The sealant container for the self-sealing substance (be used for isolate damaged tyres) that can be filled into inflatable articles, for sealant and compression
The valve cell and allocation unit of air, and equipped with the entry conductor that may be connected to the compressed air source and may be connected to described
The delivery channel of inflatable articles.
Here, the sealant can be applied by user manually or by the air compressor.By this maintenance mans
Tool bag needs multiple complex operations to recover the process of mobility, these complex operations must be by user's hand of the maintenance tool bag
Implement dynamicly.Wherein for example including：The identification blown out, the administration of sealant, sealed by pressure gauge and timer monitoring
Journey, motor vehicles in order to distribute sealant progress limited movement and to repair result assessment.
It is trained and therefore not that the most users of the maintenance tool bag do not have use for corresponding system
Exclude not just like operating the system as defined.Thus, it is possible to hinder successfully to use and seriously affect pair
The acceptance of these maintenance tool bags.
For this reason, the operation of these systems is necessarily designed as simple as possible and is not easy to slip up.This is big
It is by using universal intelligible icon, by security protection and the warning mark by be implemented by user in the case of more
Sign to realize.As shown in 2 196 305A1 of EP, control and the display system of electronics can also be used for this.EP 2 196
305A1 discloses a kind of method for the repair assisting system for being used to run and working using sealant and comprising compressor for this,
In this method, the connection of sealant stream can be by means of pressure differential to be compared to carry out automatically with predetermined threshold value.
Precisely in order to electronic system as operation is, it is necessary to carry out the pressure of electronic type on air compressor in operation
Measurement needs the electrical/electronic signal proportional to pressure.But compared to commonly used mechanical compression display, adopt
Significant cost increase can be brought with suitable electronic pressure sensor.
Pressure sensor is usually also positioned at the position of generation maximum pressure of compressor, i.e., at blower outlet.
Therefore, the usually higher air themperature at blower outlet/compressor outlet is just especially to required pressure sensor
Propose special requirement.Due to the corresponding adaptation for carrying out pressure sensor for high temperature, certainly also so that manufacture cost liter
Height, this so that cause the supported maintenance tool bag of electronics to be rarely used so far.
The content of the invention
Therefore, it is an object of the present invention to provide a kind of cost-effective method to come to the supported maintenance backman of electronics
Tool bag carries out pressure measurement and also similarly improves use duration and the reliability of the light duty compressor being accordingly equipped with herein.
This purpose is realized by the feature of main claim.Other have been disclosed in the dependent claims favourable to set
Meter.
Where it determines that drive the relevant average with the pressure change at blower outlet of the electro-motor of the compressor
Motor current is changed and is carried as the parameter proportional to pressure for running the compressor, in the form of input parameter
Supply is for example shown to control device by means of user interface.Therefore, the method according to the invention is average to measure or determine
Single pressure sensor is not required in motor current.Compared with electronic pressure sensor, this method is more cost-effective
And integration carried out from the point of view of manufacturing process be also easier to much.Especially the thermic load of pressure sensor is no longer index.
One is advantageously improved scheme and is, passes through the preferred electronic type motor control unit in driving electro-motor
The shunt resistance device at (motor driver) place come determine drive the compressor electro-motor average motor current.It is here, hot
Load does not work even and such shunt resistance device can be installed easily, i.e., need not make structure on remaining part
Change.Therefore, the shunt resistance device as " current sensor " is directly incorporated into the circuit of the motor control unit.
Another favourable design is, determine to drive the electro-motor of the compressor with the pressure at blower outlet
Power changes relevant average motor current change and as the crucial and main input parameter proportional to pressure
(in due course as unique order parameter) is supplied to the control device for controlling the compressor or the dress comprising compressor
Put.Therefore it is possible that directly and according to the correlation between motor current and the outlet pressure of compressor operate control
Device processed, wherein other sensors are not required.
The average current for the electro-motor for driving the compressor is taken full advantage of herein and is adjacent to the blower outlet
Quadratic power correlation between back pressure., can be with for purposes by pre-determined second Conversion function or numerical tabular
Enough accuracy calculates back pressure.For different operating statuses (voltage, temperature), it is necessary to adopted according to required accuracy
With different conversion functions.
Simple based on the method according to the invention and cost-effectively provide correlated inputs parameter, this method is especially suitable
Close and be applied in a kind of portable light duty compressor having by the compressor of electrical motor driven, preferably aided in maintenance
For in the sealing of vehicle tyre and the light duty compressor of pump gas, which to have for controlling the small-sized pressure in equipment
The control device of contracting machine and/or the auxiliary apparatus for repairing, wherein, one of these input signals of the controller are by the compressor
Caused outlet lateral pressure, according to this method, the pressure is determined according to motor current.
Advantageously, such light duty compressor is designed such that the light duty compressor has by crank connecting link transmission dress
Put by the reciprocating-piston compressor of electric drive, and the control device can be with the motor control for driving electro-motor
Connect unit and/or user interface communication processed, wherein, it is suitable for determining the shunting of the average motor current of the electro-motor
Resistor is arranged at the electronic type motor control unit, and the average motor current energy determined by the shunt resistance device
Enough it is treated as the input parameter of the control device.It is not required pressure to pass when carrying out such detection to the average motor current
Sensor, wherein, however and pass through the correlation between the pressure at the blower outlet and motor current, the pressure exhibition
The parameter of key is shown.
Carried out most in addition, can also be advantageously used according to the pressure measurement that average motor current carries out by regulating and controlling unit
Big pressure limit.Then, it is no longer necessary to extra mechanical pressure limiting.Then, for example for being limited in auxiliary apparatus for repairing
Light duty compressor maximum pressure such a purposes in, approximately according to presetting for different tyre types and
The threshold value of the average motor current of electro-motor representing maximum pressure, driving the compressor, is closed by its control device
Break the light duty compressor.
Brief description of the drawings
By means of embodiment, the present invention is further explained.In the accompanying drawings：
Fig. 1 schematically shows the structure of the light duty compressor in the supported auxiliary apparatus for repairing of electronics,
Fig. 2 shows the typical curve for showing average motor current and the correlation of the back pressure at compressor outlet.
Embodiment
Fig. 1 schematically shows the structure of the light duty compressor 1 in the supported auxiliary apparatus for repairing of electronics, this is small-sized
Compressor carries the reciprocating-piston compressor 3 driven by electro-motor 2, for the vehicle tyre to not showing in detail herein
Sealed and pump gas.In addition, 4 (the MCU of control device for being used for controlling auxiliary apparatus for repairing or light duty compressor is provided with herein
=Motor Control Unit).
Control device 4 is also by motor control unit 5 (MD=Motor Drive), according to via 6 (UI=of user interface
User Interface) user that obtains required to control the function of air compressor/light duty compressor 1, and the user interface is：
Such as control panel on smart phone, the input signal is converted into device, operation panel or the application program that pressure is shown
(App)。
For operating control device 4, there is provided electronic type " pressure measurement ", it is used square according to the present invention here
In the embodiment of method, which is (not detailed herein in the circuit of motor control unit 5 in being incorporated into by analysis
Displaying) data of the current sensor of the form of shunt resistance device carry out.To by means of the shunting in control device 4
The average motor current that resistor determines is handled and it is defeated with the reciprocating-piston compressor that is calculated by algorithm
Go out lateral pressure and carry out correlation.
The average current for the electro-motor for driving the compressor is taken full advantage of for this and is adjacent to the blower outlet
Quadratic power correlation between back pressure., can be with for purposes by pre-determined conversion function or by numerical tabular
Enough accuracy calculates back pressure.
For different operating statuses (voltage, temperature), it is necessary to use different conversion letters according to required accuracy
Number.Fig. 2 shows the typical curve for showing average motor current and the correlation of the back pressure at blower outlet.At that
In the measured value that is shown with good accuracy and the correlation phase of the quadratic function shown with approximate, embedded curve
It is corresponding.
Description of reference numerals
1 light duty compressor
2 electro-motors
3 reciprocating-piston compressors
4 regulation and control or control device/regulation and control unit
5 motor control units/motor driver
6 user interfaces
Claims (6)
1. it is a kind of be used for measure from by the compressor of electric drive, preferably via crank link gear by electric drive toward
The method for the pressure that multiple piston compressor (3) produces, it is characterised in that determine to drive the electro-motor (2) of the compressor
With the relevant average motor current change of pressure change at blower outlet and as running the compressor
The parameter proportional to pressure, provided or be shown to control device (4) in the form of input parameter.
2. according to the method described in claim 1, wherein, pass through the preferred electronic type motor control list in driving electro-motor
The shunt resistance device at first (5) place determines the average motor current of the electro-motor (2) of the driving compressor.
3. according to the method described in one of claim 1 and 2, wherein it is determined that drive the electro-motor of the compressor with this
The relevant average motor current of pressure change at blower outlet changes and as the input parameter proportional to pressure
It is supplied to the control device (4) for controlling the compressor (3).
4. one kind has the portable light duty compressor (1) of the compressor (3) by electro-motor (2) driving, is preferably tieing up
Repair for the sealing of vehicle tyre and the light duty compressor of pump gas in ancillary equipment, which, which has, is used to control this small
The control device of type compressor and/or the auxiliary apparatus for repairing (4), wherein, one of input signal of the controller is that this is calmed the anger
The output lateral pressure that machine (3) produces, and measure the pressure using according to the method described in one of claims 1 to 3.
5. light duty compressor according to claim 4, which has electric by crank link gear
At least one reciprocating-piston compressor (3) of dynamic driving, and wherein the control device (4) can with for the driving electricity consumption
The motor control unit (5) and/or user interface (6) of dynamic motor communicatedly connect, wherein, it is suitable for determining the electro-motor
The shunt resistance device of average motor current be arranged on electronic type motor control unit (5) place, and pass through shunting electricity
The average motor current that resistance device determines can be treated as the input parameter of the control device (4).
6. the purposes of the method according to one of claims 1 to 3, for the compact being limited in auxiliary apparatus for repairing
The maximum pressure of machine, wherein, according to it is presetting for different tyre types and represent maximum pressure, drive this to calm the anger
The threshold value of the average motor current of the electro-motor of machine, the light duty compressor is turned off by its control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210140820.5A CN114458573A (en) | 2015-07-24 | 2016-03-03 | Method for measuring pressure |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102015214006.7 | 2015-07-24 | ||
| DE102015214006.7A DE102015214006A1 (en) | 2015-07-24 | 2015-07-24 | Method for pressure measurement |
| PCT/EP2016/054507 WO2017016680A1 (en) | 2015-07-24 | 2016-03-03 | Pressure measurement method |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210140820.5A Division CN114458573A (en) | 2015-07-24 | 2016-03-03 | Method for measuring pressure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107923377A true CN107923377A (en) | 2018-04-17 |
Family
ID=55587240
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210140820.5A Pending CN114458573A (en) | 2015-07-24 | 2016-03-03 | Method for measuring pressure |
| CN201680042946.1A Pending CN107923377A (en) | 2015-07-24 | 2016-03-03 | method for measuring pressure |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210140820.5A Pending CN114458573A (en) | 2015-07-24 | 2016-03-03 | Method for measuring pressure |
Country Status (5)
| Country | Link |
|---|---|
| EP (1) | EP3325804B1 (en) |
| CN (2) | CN114458573A (en) |
| DE (1) | DE102015214006A1 (en) |
| PL (1) | PL3325804T3 (en) |
| WO (1) | WO2017016680A1 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102017212040A1 (en) | 2017-07-13 | 2019-01-17 | Continental Reifen Deutschland Gmbh | Method for weight-dependent control of the internal pressure of a loaded by a weight or load carrying body |
| AT522933B1 (en) | 2019-09-06 | 2021-04-15 | Weber Hydraulik Gmbh | Portable, battery-operated hydraulic power pack for hydraulic rescue tools |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1897387A (en) * | 2005-07-13 | 2007-01-17 | 西门子Vdo汉拏有限公司 | Apparatus for detecting over current of motor in vehicle |
| CN101375059A (en) * | 2006-01-25 | 2009-02-25 | 三电有限公司 | Electric compressor |
| US7789112B1 (en) * | 2006-11-09 | 2010-09-07 | Wise Robert W | Method and system for inflating an inflatable object |
| CN102588288A (en) * | 2011-01-12 | 2012-07-18 | 丹佛斯涡旋技术有限责任公司 | Discharge pressure estimation for compressor |
| CN102628437A (en) * | 2012-04-24 | 2012-08-08 | 西安建筑科技大学 | System for indirectly measuring flow and pressure of constant displacement pump driven by permanent magnet servo motor |
| EP2610492A1 (en) * | 2011-12-28 | 2013-07-03 | Jtekt Corporation | Motor control unit and electric pump unit |
| CN204493107U (en) * | 2015-02-13 | 2015-07-22 | 余姚市宁奇电器有限公司 | A kind of digital control gas-filled pump |
Family Cites Families (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5244357A (en) * | 1990-03-16 | 1993-09-14 | Hoerbiger Ventilwerke Aktiengesellshaft | Method for continuous control of delivery rate of reciprocating compressors and device for carrying out the method |
| JP2004297981A (en) * | 2003-03-28 | 2004-10-21 | Sanyo Electric Co Ltd | Compressor controller |
| US20060045749A1 (en) * | 2004-08-30 | 2006-03-02 | Powermate Corporation | Air compressor utilizing an electronic control system |
| US20080145245A1 (en) * | 2004-12-22 | 2008-06-19 | Wen-San Chou | Compressor for tire inflating combination |
| ITTO20080493A1 (en) * | 2008-06-23 | 2009-12-24 | Tek Global Srl | KIT FOR REPAIR AND INFLATION OF INFLATABLE ARTICLES PROVIDED WITH A PERFECT MANOMETER AND ITS METHOD |
| ATE547237T1 (en) | 2008-12-11 | 2012-03-15 | Continental Reifen Deutschland | METHOD OF OPERATION OF A ROAD ASSISTANCE SYSTEM AND ROAD ASSISTANCE SYSTEM |
| TWI495889B (en) * | 2009-07-15 | 2015-08-11 | Integrated Designs L P | System and method for determining pump pressure based on motor current |
| DE102011086572B4 (en) * | 2010-11-17 | 2019-08-14 | KSB SE & Co. KGaA | Method and control device for variable-speed control of a positive displacement pump assembly and positive displacement pump assembly |
| JP5891787B2 (en) * | 2011-12-28 | 2016-03-23 | 株式会社ジェイテクト | Oil supply system |
| KR101174430B1 (en) * | 2012-01-20 | 2012-08-16 | 김금균 | An air compressor auxiliary control apparatus and an auxiliary control process thereby |
| WO2013127452A1 (en) * | 2012-02-29 | 2013-09-06 | Lukas Hydraulik Gmbh | Method for operating a hydraulic pump arrangement, and hydraulic pump arrangement |
-
2015
- 2015-07-24 DE DE102015214006.7A patent/DE102015214006A1/en not_active Withdrawn
-
2016
- 2016-03-03 CN CN202210140820.5A patent/CN114458573A/en active Pending
- 2016-03-03 WO PCT/EP2016/054507 patent/WO2017016680A1/en active Application Filing
- 2016-03-03 EP EP16710928.9A patent/EP3325804B1/en active Active
- 2016-03-03 PL PL16710928T patent/PL3325804T3/en unknown
- 2016-03-03 CN CN201680042946.1A patent/CN107923377A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1897387A (en) * | 2005-07-13 | 2007-01-17 | 西门子Vdo汉拏有限公司 | Apparatus for detecting over current of motor in vehicle |
| CN101375059A (en) * | 2006-01-25 | 2009-02-25 | 三电有限公司 | Electric compressor |
| US7789112B1 (en) * | 2006-11-09 | 2010-09-07 | Wise Robert W | Method and system for inflating an inflatable object |
| CN102588288A (en) * | 2011-01-12 | 2012-07-18 | 丹佛斯涡旋技术有限责任公司 | Discharge pressure estimation for compressor |
| EP2610492A1 (en) * | 2011-12-28 | 2013-07-03 | Jtekt Corporation | Motor control unit and electric pump unit |
| CN102628437A (en) * | 2012-04-24 | 2012-08-08 | 西安建筑科技大学 | System for indirectly measuring flow and pressure of constant displacement pump driven by permanent magnet servo motor |
| CN204493107U (en) * | 2015-02-13 | 2015-07-22 | 余姚市宁奇电器有限公司 | A kind of digital control gas-filled pump |
Also Published As
| Publication number | Publication date |
|---|---|
| PL3325804T3 (en) | 2021-06-28 |
| EP3325804B1 (en) | 2020-12-09 |
| DE102015214006A1 (en) | 2017-01-26 |
| WO2017016680A1 (en) | 2017-02-02 |
| EP3325804A1 (en) | 2018-05-30 |
| CN114458573A (en) | 2022-05-10 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20180417 |