CN107420337A - A kind of control circuit of blower with diagnostic function - Google Patents
A kind of control circuit of blower with diagnostic function Download PDFInfo
- Publication number
- CN107420337A CN107420337A CN201710607348.0A CN201710607348A CN107420337A CN 107420337 A CN107420337 A CN 107420337A CN 201710607348 A CN201710607348 A CN 201710607348A CN 107420337 A CN107420337 A CN 107420337A
- Authority
- CN
- China
- Prior art keywords
- resistance
- triode
- blower
- lpm
- circuit
- 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.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
- F04D—NON-POSITIVE-DISPLACEMENT PUMPS
- F04D27/00—Control, e.g. regulation, of pumps, pumping installations or pumping systems specially adapted for elastic fluids
- F04D27/001—Testing thereof; Determination or simulation of flow characteristics; Stall or surge detection, e.g. condition monitoring
Abstract
The invention discloses a kind of control circuit of blower with diagnostic function, including blower duty circuit, the blower duty circuit includes supply voltage VBATT, diode D1 and resistance R2, diode D1 positive pole is connected on supply voltage VBATT, resistance R2 is connected on diode D1 negative pole, and the low side control circuit of air blower and air blower diagnostic circuit are connected on the resistance R2.It is an advantage of the invention that：Development cost is greatlyd save, the capturing function carried using MCU I/O ports, realizes the diagnostic function of LPM output functions and LPM output ports；The design is applied in other similar PWM designing circuitries for having diagnosis to require.
Description
Technical field
The present invention relates to technical field of automotive electronics, especially a kind of drum suitable for automotive electronics and with diagnostic function
Draught fan control circuit.
Background technology
Air blower pwm signal（Hereinafter referred to as LPM）Output, for controlling the blower duty on air-conditioning box, regulation LPM is accounted for
It is empty to adjust air-conditioning wind-force size than can.At present the air-conditioner controller on vehicle typically may require that output port is done short circuit,
Open circuit diagnosis.Therefore, the LPM output diagnosis on air-conditioner controller are just particularly important.
General circuit design requires to realize, LPM exports short power supply, short, open circuit diagnosis, and common design method is to select
The low side pipe of intelligence realizes that MCU is communicated by the interfaces such as SPI and the low side pipe of intelligence, whether the state of monitoring LPM outputs is different
Often.But such design cost is higher.
The content of the invention
Instant invention overcomes the deficiencies in the prior art, there is provided a kind of control circuit of blower with diagnostic function, its
Using discrete component, sent out altogether while low side pipe is by adjusting PWM ripple Duty ratio control blower air quantities, then by one
Emitter base diode circuit captures the PWM ripples of air blower output port.MCU is by the PWM ripples of capture and is output to the PWM ripples of low side pipe and does pair
Than making corresponding diagnosis.
To achieve these goals, the technical solution adopted by the present invention is：A kind of air compressor control with diagnostic function
Circuit, including blower duty circuit, the blower duty circuit include supply voltage VBATT, diode D1 and resistance R2,
Diode D1 positive pole is connected on supply voltage VBATT, and resistance R2 is connected on diode D1 negative pole, on the resistance R2
It is connected to the low side control circuit of air blower and air blower diagnostic circuit.
The further setting of the present invention is：The low side control circuit of the air blower include resistance R4, resistance R5, resistance R6,
Resistance R7, resistance R11, resistance R12, electric capacity C2, electric capacity C3, the LPM_PWM ends of triode Q3 and input duty cycle, the resistance
R4, resistance R5, resistance R6 settings parallel with one another, and be connected between resistance R2 and triode Q3 colelctor electrode, the electric capacity
C2 is connected between resistance R2 and ground connection GND, and the resistance R11 is connected in triode Q3 base stage, the resistance R12 connections
Between triode Q3 base stage and ground connection GND, the electric capacity C3 is connected between resistance R11 and ground connection GND, the resistance R7
It is connected between resistance R11 and LPM_PWM ends.
The further setting of the present invention is：The air blower diagnostic circuit includes the enabled circuit of air blower diagnosis and air blower
Diagnose output circuit.
The further setting of the present invention is：The enabled circuit of air blower diagnosis includes triode Q1, triode Q2, resistance
R8, resistance R9, resistance R13, resistance R14, resistance R15, resistance R16, electric capacity C4 and the LPM_DIAG_EN ends for inputting on/off,
The emitter stage of the triode Q1 is connected on resistance R2, and the resistance R13 is connected to triode Q1 emitter stage and triode
Between Q1 base stage, the resistance R14 is connected in triode Q1 base stage, and the resistance R8 connects with resistance R14, and described three
Pole pipe Q4 colelctor electrode is connected on resistance R8, and the emitter stage of the triode Q4 is connected on ground connection GND, the resistance R15
It is connected in triode Q4 base stage, the resistance R15 is connected between triode Q4 base stage and ground connection GND, the resistance
R16 is connected in triode Q4 base stage, and the electric capacity C4 is connected between resistance R16 and ground connection GND, the resistance R9 connections
Between resistance R16 and LPM_DIAG_EN ends.
The further setting of the present invention is：The air blower diagnosis output circuit includes triode Q2, resistance R1, resistance
R3, resistance R17, resistance R18, electric capacity C1, the LPM_PWM_DIAG ends of output duty cycle and supply voltage VDD, the resistance R3
It is connected on triode Q1 colelctor electrode, the resistance R17 connects with resistance R3, and the base stage of the triode Q2 is connected to resistance
On R17, the emitter stage of the triode Q2 is connected on ground connection GND, the resistance R18 be connected to resistance R17 and ground connection GND it
Between, the resistance R1 is connected between supply voltage VDD and triode Q2 colelctor electrode, and the LPM_PWM_DIAG ends are connected to
On triode Q2 colelctor electrode, the electric capacity C1 is connected between triode Q2 colelctor electrode and ground connection GND.
The present invention further setting be：The supply voltage VBATT is 9V-16V.
It is an advantage of the invention that：Development cost is greatlyd save, the capturing function carried using MCU-IO mouths, is realized
The diagnostic function of LPM output functions and LPM output ports；The design is applied to other similar PWM outputs for having diagnosis to require
In circuit design.
The invention will be further described below in conjunction with the accompanying drawings.
Brief description of the drawings
Fig. 1 is the circuit theory schematic diagram of the present invention；
Fig. 2 is the low side control circuit principle schematic of air blower of the present invention；
Fig. 3 is the air blower diagnostic circuit principle schematic of the present invention.
Embodiment
As Figure 1-3, LPM circuits can be divided into：The low side control circuit of air blower external loading, air blower and air blower are examined
Deenergizing.
Air blast drive circuit is built using discrete component, and software only need to be by controlling the dutycycle at LPM_PWM ends
With capture LPM_PWM_DIAG dutycycle（MCU-IO mouths possess capturing function corresponding to it is required that）, you can realize that air blower exports
The diagnostic function of function and air blower output port.
Air blower external load circuit operation principle：
Blower duty circuit includes supply voltage VBATT, diode D1 and resistance R2, and diode D1 positive pole is connected to power supply
On voltage VBATT, resistance R2 is connected on diode D1 negative pole, and resistance R2 is 4.64K Ω, diode D1 models 1SR154
（Maximum forward current value 1A）.
The low side control circuit fundamental diagram of air blower：
The low side control circuit of air blower include resistance R4, resistance R5, resistance R6, resistance R7, resistance R11, resistance R12, electric capacity C2,
Electric capacity C3, triode Q3 and input duty cycle LPM_PWM ends, resistance R4, resistance R5, resistance R6 settings parallel with one another, and
It is connected between resistance R2 and triode Q3 colelctor electrode, electric capacity C2 is connected between resistance R2 and ground connection GND, and resistance R11 connects
It is connected in triode Q3 base stage, resistance R12 is connected between triode Q3 base stage and ground connection GND, and electric capacity C3 is connected to electricity
Hinder between R11 and ground connection GND, resistance R7 is connected between resistance R11 and LPM_PWM ends.
Resistance R7 is 0 Ω, resistance R11 is 2.2K Ω, resistance R12 is 10K Ω, electric capacity C2 is 1nF, electric capacity C3 models
10nF, triode Q3 are NPN type.
R4, R5, R6 are the current-limiting resistance R of air blower output end, in order to are prevented under Q3 conducting states, the short electricity of LPM
Q3 is burnt during source.
The requirement of air blower output end current-limiting resistance R choosings value：
1. air blower output end low level<3V（VBATT spans are 9V ~ 16V）
I.e.
--> R <1131.7 Ω,
2. under normal temperature, during VBATT=16V, it is desirable to driving current>2.5mA
I.e.
--> R <1480 Ω,
Wherein VD1=0.7V, it is diode D1 forward conduction voltage drop,
3.R rated power can not be too small, and R resistances are conventional resistance, with due regard to error and surplus,
To sum up consider, R selects 3 packaged resistances of 620 Ω 1210 in parallel, equivalent resistance 207 Ω, rated power 1W after parallel connection.Examine
Consider most harsh conditions, short power supply 16V, R are subjected to power, i.e. 1.23W>1W rated power, therefore it is required that soft
Part turns off blower circuit in time after the short power supply of air blower output end is detected.
As VBATT=16V, Q3 base currents
, collector current
。
Because, so ensure that Q3 is operated in saturation conduction state.
Air blower diagnostic circuit operation principle：
Air blower diagnostic circuit includes the enabled circuit of air blower diagnosis and air blower diagnosis output circuit.
The enabled circuit of air blower diagnosis includes triode Q1, triode Q2, resistance R8, resistance R9, resistance R13, resistance
R14, resistance R15, resistance R16, electric capacity C4 and the LPM_DIAG_EN ends for inputting on/off, triode Q1 emitter stage are connected to
On resistance R2, resistance R13 is connected between triode Q1 emitter stage and triode Q1 base stage, and resistance R14 is connected to three poles
In pipe Q1 base stage, resistance R8 is connected with resistance R14, and triode Q4 colelctor electrode is connected on resistance R8, triode Q4 hair
Emitter-base bandgap grading is connected on ground connection GND, and resistance R15 is connected in triode Q4 base stage, and resistance R15 is connected to triode Q4 base stage
Between ground connection GND, resistance R16 is connected in triode Q4 base stage, and electric capacity C4 is connected between resistance R16 and ground connection GND,
Resistance R9 is connected between resistance R16 and LPM_DIAG_EN ends.
Triode Q1 is positive-negative-positive, triode Q2 is NPN type, resistance R8 is 4.7K Ω, resistance R9 is 0 Ω, resistance R13 is
10K Ω, resistance R14 are 10K Ω, resistance R15 is 10K Ω, resistance R16 is 10K Ω, electric capacity C4 is 10nF.
Air blower diagnosis output circuit include triode Q2, resistance R1, resistance R3, resistance R17, resistance R18, electric capacity C1,
The LPM_PWM_DIAG ends of output duty cycle and supply voltage VDD, resistance R3 are connected on triode Q1 colelctor electrode, resistance
R17 is connected with resistance R3, and triode Q2 base stage is connected on resistance R17, and triode Q2 emitter stage is connected to ground connection GND
On, resistance R18 is connected between resistance R17 and ground connection GND, and resistance R1 is connected to supply voltage VDD and triode Q2 current collection
Between pole, LPM_PWM_DIAG ends are connected on triode Q2 colelctor electrode, electric capacity C1 be connected to triode Q2 colelctor electrode with
It is grounded between GND.
Triode Q2 is NPN type, resistance R1 is 10K Ω, resistance R3 is 15K Ω, resistance R17 is 2.2K Ω, resistance R18 is
10K Ω, electric capacity C1 are 10nF.
The voltage of air blower output end is
,（Air blower output end maximum low level value）When, it is desirable to Q2 can not be turned on.Q2 base resistancesFor 2.2K Ω, base stage with
Resistance between emitter stageFor 10K Ω, R3 is 15K Ω.Assuming that Q1 saturation conductions, then Q1 emitter voltages
, 0.94V is maximum low level value, therefore Q1 ends, Q2 cut-offs, LPM_PWM_DIAG output high level.
During VBATT=9V, it is desirable to Q1, Q2, Q4 saturation conduction.
Now, Q18 shut-offs, air blower diagnosis are opened, and can be obtained by Kirchhoff's law：
It is by calculating LPM terminal voltages（>4.75V hsrdware requirements）, Q1 base currents are 0.313mA, Q1
Collector current is,
ByKnow Q1 saturation conductions；Q2 base currents are,
Q2 collector currents are,, when, Q2 critical saturation conductions when, most
Small gain is（At -40 DEG C）, therefore Q2 also saturation conductions.
During normal work, LPM_DIAG_EN ends are kept it turned on, and LPM_PWM incoming frequencies are 35Hz PWM waveform,
LPM ends export corresponding PWM ripples control air blower working condition, while the dutycycle at MCU capture LPM_PWM_DIAG ends.Due to
Present case design requirement LPM duty cycle ranges are 17.5% ~ 97%, and LPM and (LPM_PWM and LPM_PWM_DIAG) are reversely, because
This LPM_PWM and LPM_PWM_DIAG duty cycle range is 3% ~ 82.5%.
LPM circuit diagnostics demands：
1. under on states, short power supply diagnosis；When i.e. LPM_PWM has input, the short power supplys of LPM can be detected；
Under 2.off states, the diagnosis of short ground or open circuit；That is when LPM_PWM is without input, the short ground of LPM or open circuit can be detected；
Specific diagnosis is as described in Table 1：
Table 1, LPM circuit diagnostics
The abnormity diagnosis that can be realized in table 1 is：
1st, under on states, short power supply or short ground or open circuit diagnosis；When i.e. LPM_PWM has input, LPM short power supplys or short can be detected
Ground or open circuit;
2nd, under off states, the diagnosis of short ground or open circuit；That is when LPM_PWM is without input, the short ground of LPM or open circuit can be detected.
Claims (6)
1. a kind of control circuit of blower with diagnostic function, including blower duty circuit, it is characterised in that：The air blast
Machine load circuit includes supply voltage VBATT, diode D1 and resistance R2, and diode D1 positive pole is connected to supply voltage
On VBATT, resistance R2 is connected on diode D1 negative pole, and the low side control circuit of air blower is connected on the resistance R2
With air blower diagnostic circuit.
A kind of 2. control circuit of blower with diagnostic function according to claim 1, it is characterised in that：The air blast
The low side control circuit of machine include resistance R4, resistance R5, resistance R6, resistance R7, resistance R11, resistance R12, electric capacity C2, electric capacity C3,
Triode Q3 and input duty cycle LPM_PWM ends, the resistance R4, resistance R5, resistance R6 settings parallel with one another, and connect
Between resistance R2 and triode Q3 colelctor electrode, the electric capacity C2 is connected between resistance R2 and ground connection GND, the resistance
R11 is connected in triode Q3 base stage, and the resistance R12 is connected between triode Q3 base stage and ground connection GND, the electricity
Hold C3 to be connected between resistance R11 and ground connection GND, the resistance R7 is connected between resistance R11 and LPM_PWM ends.
A kind of 3. control circuit of blower with diagnostic function according to claim 1 or 2, it is characterised in that：It is described
Air blower diagnostic circuit includes the enabled circuit of air blower diagnosis and air blower diagnosis output circuit.
A kind of 4. control circuit of blower with diagnostic function according to claim 3, it is characterised in that：The air blast
The enabled circuit of machine diagnosis includes triode Q1, triode Q2, resistance R8, resistance R9, resistance R13, resistance R14, resistance R15, electricity
Hinder R16, electric capacity C4 and input on/off LPM_DIAG_EN ends, the emitter stage of the triode Q1 is connected on resistance R2, institute
State resistance R13 to be connected between triode Q1 emitter stage and triode Q1 base stage, the resistance R14 is connected to triode Q1
Base stage on, the resistance R8 is connected with resistance R14, and the colelctor electrode of the triode Q4 is connected on resistance R8, three pole
Pipe Q4 emitter stage is connected on ground connection GND, and the resistance R15 is connected in triode Q4 base stage, the resistance R15 connections
Between triode Q4 base stage and ground connection GND, the resistance R16 is connected in triode Q4 base stage, and the electric capacity C4 connects
It is connected between resistance R16 and ground connection GND, the resistance R9 is connected between resistance R16 and LPM_DIAG_EN ends.
A kind of 5. control circuit of blower with diagnostic function according to claim 4, it is characterised in that：The air blast
Machine diagnosis output circuit includes triode Q2, resistance R1, resistance R3, resistance R17, resistance R18, electric capacity C1, output duty cycle
LPM_PWM_DIAG ends and supply voltage VDD, the resistance R3 are connected on triode Q1 colelctor electrode, the resistance R17 with
Resistance R3 is connected, and the base stage of the triode Q2 is connected on resistance R17, and the emitter stage of the triode Q2 is connected to ground connection
On GND, the resistance R18 is connected between resistance R17 and ground connection GND, and the resistance R1 is connected to supply voltage VDD and three poles
Between pipe Q2 colelctor electrode, the LPM_PWM_DIAG ends are connected on triode Q2 colelctor electrode, and the electric capacity C1 is connected to
Between triode Q2 colelctor electrode and ground connection GND.
A kind of 6. control circuit of blower with diagnostic function according to claim 1, it is characterised in that：The power supply
Voltage VBATT is 9V-16V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710607348.0A CN107420337B (en) | 2017-07-24 | 2017-07-24 | A kind of control circuit of blower with diagnostic function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710607348.0A CN107420337B (en) | 2017-07-24 | 2017-07-24 | A kind of control circuit of blower with diagnostic function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107420337A true CN107420337A (en) | 2017-12-01 |
| CN107420337B CN107420337B (en) | 2019-05-07 |
Family
ID=60431200
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710607348.0A Active CN107420337B (en) | 2017-07-24 | 2017-07-24 | A kind of control circuit of blower with diagnostic function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107420337B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050083A (en) * | 2017-12-07 | 2018-05-18 | 惠州市德赛西威汽车电子股份有限公司 | A kind of band protection and the water pump driving circuit of diagnostic function |
| CN110238438A (en) * | 2019-06-25 | 2019-09-17 | 盐城市韩景汽车配件有限公司 | Cutting equipment is used in the processing of automotive seat pipe fitting |
| CN110636664A (en) * | 2019-08-02 | 2019-12-31 | 惠州市德赛西威汽车电子股份有限公司 | Indicator lamp driving circuit with diagnosis function |
| CN111255728A (en) * | 2020-03-20 | 2020-06-09 | 江铃汽车股份有限公司 | Blower driving circuit with diagnosis and protection functions |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10133740A (en) * | 1996-10-28 | 1998-05-22 | Shinryo Corp | Method for detecting abnormality of fan and pump for air-conditioning by acoustic method |
| CN102003400A (en) * | 2010-12-28 | 2011-04-06 | 易事特电力系统技术有限公司 | Direct current fan speed regulation and fault sensing circuit |
| CN103176070A (en) * | 2011-12-23 | 2013-06-26 | 比亚迪股份有限公司 | Fault acquisition circuit and fault diagnosis circuit provided with same |
| CN104564768A (en) * | 2014-12-30 | 2015-04-29 | 延锋伟世通电子科技（上海）有限公司 | Control circuit for car air conditioner air blower |
| CN205190049U (en) * | 2015-12-07 | 2016-04-27 | 重庆红江机械有限责任公司 | Current drive circuit |
-
2017
- 2017-07-24 CN CN201710607348.0A patent/CN107420337B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH10133740A (en) * | 1996-10-28 | 1998-05-22 | Shinryo Corp | Method for detecting abnormality of fan and pump for air-conditioning by acoustic method |
| CN102003400A (en) * | 2010-12-28 | 2011-04-06 | 易事特电力系统技术有限公司 | Direct current fan speed regulation and fault sensing circuit |
| CN103176070A (en) * | 2011-12-23 | 2013-06-26 | 比亚迪股份有限公司 | Fault acquisition circuit and fault diagnosis circuit provided with same |
| CN104564768A (en) * | 2014-12-30 | 2015-04-29 | 延锋伟世通电子科技（上海）有限公司 | Control circuit for car air conditioner air blower |
| CN205190049U (en) * | 2015-12-07 | 2016-04-27 | 重庆红江机械有限责任公司 | Current drive circuit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108050083A (en) * | 2017-12-07 | 2018-05-18 | 惠州市德赛西威汽车电子股份有限公司 | A kind of band protection and the water pump driving circuit of diagnostic function |
| CN110238438A (en) * | 2019-06-25 | 2019-09-17 | 盐城市韩景汽车配件有限公司 | Cutting equipment is used in the processing of automotive seat pipe fitting |
| CN110238438B (en) * | 2019-06-25 | 2020-05-08 | 盐城市韩景汽车配件有限公司 | Cutting equipment is used in processing of car seat pipe fitting |
| CN110636664A (en) * | 2019-08-02 | 2019-12-31 | 惠州市德赛西威汽车电子股份有限公司 | Indicator lamp driving circuit with diagnosis function |
| CN111255728A (en) * | 2020-03-20 | 2020-06-09 | 江铃汽车股份有限公司 | Blower driving circuit with diagnosis and protection functions |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107420337B (en) | 2019-05-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN107420337A (en) | A kind of control circuit of blower with diagnostic function | |
| CN103312250B (en) | A kind of alternating current generator regulator and method | |
| CN104426195A (en) | Charging control method of small battery capacity battery pole and charger | |
| CN108050083A (en) | A kind of band protection and the water pump driving circuit of diagnostic function | |
| CN102287890A (en) | Externally controlled variable-discharge capacity compressor air conditioner controller | |
| CN206739531U (en) | A kind of semi-automatic electric air-conditioner control system | |
| CN206379719U (en) | Overcurrent protection peripheral circuit and electrical equipment | |
| CN203117783U (en) | Electronic load unit | |
| CN106842019B (en) | A kind of inner-outer circulation motor open detection circuit of air-conditioner controller | |
| CN116317660B (en) | Controllable inverter circuit | |
| CN115065237B (en) | Buck-boost converter and output feedback control method thereof | |
| US20070244683A1 (en) | Device simulating operation of a machine that functions as either a motor or a generator | |
| CN110112991A (en) | A kind of control method, device and the air conditioner of frequency-changeable compressor demagnetization | |
| CN206708066U (en) | A kind of SCM Based rotating speed of DC fan is precisely controlled circuit | |
| CN107801274A (en) | A kind of constant power output LED drive power and its constant power output method | |
| CN211123804U (en) | Temperature interval control circuit and electronic equipment | |
| CN212028135U (en) | Fill electric pile fan speed governing control circuit | |
| CN208862569U (en) | A kind of blower for vehicle air conditioning line loss compensation circuit | |
| CN103219938B (en) | A kind of current detection circuit | |
| CN101251117B (en) | Method for increasing blowing machine static pressure using circuit as well as implement circuit thereof | |
| CN209593088U (en) | A kind of driving power of air conditioner compressed machine controller | |
| CN201382007Y (en) | Control circuit for stabilizing wind speed of blast blower | |
| CN110247593A (en) | A kind of more DC fan Rotating speed measring circuits and method | |
| CN104960399A (en) | Electric air conditioning control system | |
| CN113541536B (en) | Lead angle control device and method of motor and air conditioning system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder |
Address after: No.289, Binhai 2nd Road, Wenzhou Economic and Technological Development Zone, Zhejiang Province 325000 Patentee after: Zhejiang Changjiang Automobile Electronics Co.,Ltd. Address before: No.289, Binhai 2nd Road, Wenzhou Economic and Technological Development Zone, Zhejiang Province 325000 Patentee before: WENZHOU CHANGJIANG AUTOMOBILE ELECTRONIC SYSTEM Co.,Ltd. |
|
| CP01 | Change in the name or title of a patent holder |