CN207438547U - Steam generator and automobile window glass defrosting-defogging performance detecting system - Google Patents
Steam generator and automobile window glass defrosting-defogging performance detecting system Download PDFInfo
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- CN207438547U CN207438547U CN201721570589.4U CN201721570589U CN207438547U CN 207438547 U CN207438547 U CN 207438547U CN 201721570589 U CN201721570589 U CN 201721570589U CN 207438547 U CN207438547 U CN 207438547U
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Abstract
The utility model provides a kind of steam generator and automobile window glass defrosting-defogging performance detecting system.The steam generator, including water tank, the heating unit connected with the water tank, the steam exhaust device connected with the heating unit and the control device being connected with the heating unit and steam exhaust device；The heating unit includes the heated shell connected with the water tank, and the heater being arranged in the heated shell and connection are arranged at the steam outlet pipe in the heated shell, and the steam exhaust device is connected with the steam outlet pipe；The control device includes control circuit, the first power controller being connected with the heater, and the steam flow sensor on the steam outlet pipe of the heated shell is arranged at, the steam flow sensor and the first power controller are communicated to connect with the control circuit.Technical solution provided by the utility model can accurately detect the quantity of steam of generation so that quantity of steam is accurately controllable.
Description
Technical field
The utility model is related to automotive inspection equipment technical field, more particularly to a kind of steam generator and automobile air window glass
Glass defrosting-defogging performance detecting system.
Background technology
In vehicle traveling process, the problem of automobile window glass frosting is hazed is frequently encountered, if defrosting-defogging effect
It is bad, the safety of driving will be seriously affected.The performance for improving Defroster device for vehicle demisting is one of the Automobile Design development phase important
Work, defrosting-defogging performance is an important indicator of national standard compulsory test, GB11555-2009 and GB11556-2009
Glass for vehicle window defrosting, fog removal performance and test method are made clearly stipulate that being required within a certain period of time in the regulation, vehicle window shelves
The some regions of wind glass must be without product mist, frost accumulated, accumulated ice and accumulated snow.
Therefore, a kind of automobile window glass defrosting-defogging performance detecting system is just proposed in traditional technology, with to automobile
The defrosting-defogging performance of windscreen is tested.And technical indicator is it can be found that detecting system according to as defined in analytical standard
In steam generator output quantity of steam be a very crucial index, directly affect the result of test.But traditional skill
Steam generator in art all can not accurately detect quantity of steam so that quantity of steam is uncontrollable.
Utility model content
Based on this, to solve the above problems, the utility model provides a kind of steam generator and automobile window glass defrosting
Fog removal performance detecting system can accurately detect the quantity of steam of generation so that quantity of steam is accurately controllable.
Its technical solution is as follows：
A kind of steam generator, including water tank, the heating unit connected with the water tank is connected with the heating unit
Steam exhaust device and the control device being connected with the heating unit and steam exhaust device；
The heating unit includes the heated shell connected with the water tank, the heating being arranged in the heated shell
Device and connection are arranged at the steam outlet pipe in the heated shell, and the steam exhaust device is connected with the steam outlet pipe；
The control device includes control circuit, the first power controller being connected with the heater and is arranged at
Steam flow sensor on the steam outlet pipe of the heated shell, the steam flow sensor and the first power controller with
The control circuit communication connection.
The water tank can supply water to the heating unit, and heating unit, which heats water, generates vapor, and vapor enters
In the steam exhaust device, the steam exhaust device can discharge vapor.In the process, the control device can add to described
Thermal, steam exhaust device are controlled, so as to which the heating unit be controlled to generate the speed and flow of vapor, and described in control
Steam exhaust device discharges the speed and flow of vapor.Moreover, by setting first Power Control in the control device
Device and steam flow sensor, the steam flow that the steam flow sensor can be utilized to generate heater are detected,
And the power of the heater is adjusted using first power controller according to testing result, so as to add to heater
Thermogenetic steam flow is adjusted.So as to form steam looped system, quantity of steam can accurately be examined
It surveys, so that the generation of quantity of steam is accurately controllable.
Further technical solution is illustrated below：
Further, the steam flow sensor is arranged to mass flow sensor, and the mass flow sensor is used
The quantity of steam of the steam outlet pipe is flowed through in detection.
Further, the steam exhaust device includes the steam diffuser casing connected with the steam outlet pipe and is arranged at described
Spray vapour lock on steam diffuser casing.
Further, the steam diffuser casing is arranged to cylindric, and multiple spray vapour locks are evenly arranged in the steaming
Vapour diffuser casing bottom side.
Further, the steam exhaust device further includes the wind turbine being arranged at the top of the steam diffuser casing；
And the control device further includes the Rotating speed measring structure being connected with the wind turbine and the second power controller, it is described
Rotating speed measring structure and the second power controller are communicated to connect with the control circuit.
Further, insulation shell is further included, the water tank and heating unit may be contained within inside the insulation shell, institute
Steam exhaust device is stated to be arranged at the top of the insulation shell.
Further, further include the human-computer interaction structure being arranged on the insulation shell, the human-computer interaction structure with
The control circuit communication connection.
Further, the human-computer interaction structure include being arranged at interactive display on the insulation shell and control by
Button, the interactive display and control button are communicated to connect with the control circuit.
Further, the power module being electrically connected with the control circuit, heating unit and steam exhaust device is further included, with
And the liquid level detecting sensor in the heated shell is arranged at, the liquid level detecting sensor and the control circuit communication link
It connects.
In addition, the utility model also proposes a kind of automobile window glass defrosting-defogging performance detecting system, including environment temperature
Simulator is spent, the testboard in the environment temperature simulation device is arranged at as described above on the testboard
Steam generator, the test specimen being removably fixed on the testboard and with the environment temperature simulation device, steam generation
Device and the control mechanism of test specimen connection.
The utility model has the advantages that：
1st, the rule of GB11555-2009 and GB11556-2009 to glass for vehicle window defrosting, fog removal performance and test method are met
Fixed and requirement, suitable for the detection of the automobile window glass defrosting-defogging performance of various；
2nd, by setting steam looped system, the controllable precise of quantity of steam is realized；
3rd, realize the automation of detection device, reduce and adjust error, more accurately reappearing automobile window glass actually makes
The frost mist environment being subjected in；
4th, the degree of automation and standardized level of high gas pressure test are helped to improve, to airborne equipment high gas pressure test and
The similar experiment such as water depth pressure experiment has significant demonstration effect.
Description of the drawings
Fig. 1 is the theory structure simplified schematic diagram of steam generator described in the utility model embodiment；
Fig. 2 is the stereoscopic schematic diagram of steam generator described in the utility model embodiment.
Reference sign：
100- water tanks, 101- shell structures, 110- water inlets, 200- heating units, the first power controllers of 210-, 220-
Steam flow sensor, 300- steam diffuser casings, 310- spray vapour locks, 400- wind turbines, 410- Rotating speed measring structures, the second work(of 420-
Rate controller, 500- control circuits, 600- human-computer interaction structures, 700- steam outlet pipes, 800- power modules.
Specific embodiment
The following is a combination of the drawings in the embodiments of the present utility model, and the technical scheme in the embodiment of the utility model is carried out
It clearly and completely describes, it is clear that the described embodiments are only a part of the embodiments of the utility model rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are without creative efforts
All other embodiments obtained shall fall within the protection scope of the present invention.
The utility model proposes a kind of automobile window glass defrosting-defogging performance detecting systems, are filled including environment temperature simulation
It puts, the testboard in the environment temperature simulation device, the steam generator being arranged on the testboard, it is detachable solid
Due to the test specimen on the testboard and the control being connected with the environment temperature simulation device, steam generator and test specimen
Mechanism.When experiment, the steam generator is controlled by water-vapour spray to the test specimen by the control mechanism, and institute
The situation that automobile air window when various real drivings drive is in varying environment temperature can be simulated by stating environment temperature simulation device, because
Can water mist or frost be formed according to analog temperature on this described test specimen, the test specimen eliminates water by self heating function again at this time
Mist or frost, so as to detect the defrosting-defogging performance of automobile window glass.
Moreover, as shown in Figure 1 to Figure 2, the steam generator includes water tank 100, the heating connected with the water tank 100
Device 200, the steam exhaust device connected with the heating unit 200 and is connected with the heating unit 200 and steam exhaust device
Control device.The water tank 100 can supply water to the heating unit 200, and the heating unit 200, which heats water, generates water steaming
Gas, vapor enter in the steam exhaust device, and the steam exhaust device can discharge vapor.In the process, the control dress
The heating unit 200, steam exhaust device can be controlled by putting, and the heating unit 200 is controlled to generate the speed of vapor
And flow, and the speed and flow of the steam exhaust device discharge vapor are controlled, to simulate the steam of passenger's generation.
Specifically, the steam generator further includes shell structure 101, and the shell structure 101 may be configured as keeping the temperature
Housing, the water tank 100, heating unit 200 and steam exhaust device may be contained within inside the insulation shell 101, and the steam discharge
Device is provided projectingly at the top of the insulation shell.By setting the insulation shell, frame structure pair on the one hand can be formed
Whole equipment is supported, convenient to carry out modularized design to whole equipment；On the other hand, can also to the water tank 100, plus
Thermal 200 and steam exhaust device are kept the temperature, and particularly the heating unit 200 and steam exhaust device are kept the temperature, avoided low
The loss of heat and the loss of steam heat are heated under warm environment.In addition, the shell structure 101 may be set to be it is general
Logical housing, such as common metal shell or plastic casing.
Moreover, the water tank 100 includes being arranged at the babinet inside the insulation shell and is arranged at the insulation cladding
Water inlet 110 on body, the water inlet 110 are connected with the babinet.It is convenient for by the water inlet 110 into the babinet
It adds and stores water, heated with being supplied in the heating unit 200.Moreover, it is additionally provided with lid at the water inlet 110
Body can be sealed the water inlet 110.In addition, the heating unit 200 includes connecting with the babinet of the water tank 100
Logical heated shell, the heater being arranged in the heated shell and connection are arranged in the heated shell and go out vapour
Pipe 700, the steam exhaust device are connected with the steam outlet pipe 700.The water stored in the water tank 100 is transported to the heated shell
In, and water is heated using the heater set in the heated shell, add thermogenetic steam can be from the heating shell
Steam outlet pipe 700 is transported in body, and is transported to by the steam outlet pipe in the steam exhaust device, steam is then discharged to test specimen
On.Moreover, in the present embodiment, the heated shell may be alternatively provided as insulation construction, kept the temperature for the water of heating.In addition,
The bottom of the babinet is connected with the bottom of the heated shell, is so convenient for the water in the water tank 100 being transported to described
In heating unit 200.In addition, the heater could be provided as electric heater, and the electric heater may be disposed at described add
Above the bottom of hot housing, the steam outlet pipe 700 also connects the top for being arranged at the heated shell, convenient for adding thermogenetic steaming
Vapour is flowed upwardly into the steam outlet pipe 700 and is transported in the steam exhaust device.
In addition, the steam exhaust device includes the steam diffuser casing 300 connected with the steam outlet pipe 700 and is arranged at institute
State the wind turbine 400 on steam diffuser casing 300.The heating unit 300 plus thermogenetic steam are entered by the steam outlet pipe 700
After in the steam diffuser casing 300, it is possible to be discharged on the test specimen and carry out testing inspection.Moreover, by the steam
300 top of diffuser casing sets the wind turbine 400, can spread the steam converged in the steam diffuser casing 300 as needed
To outside.Moreover, the steam diffuser casing 300 can also include the steam chest housing for being provided with heat insulation layer structure, convenient for steam
It is kept the temperature.In addition, the steam diffuser casing 300 further includes the spray vapour lock 310 being arranged on the steam chest housing, by described
It sprays vapour lock 310 to be convenient for spraying steam to outside, to simulate the situation that people's breathing generates steam.Further, the steam diffusion
Room 300 may be configured as cylindrical shape, and multiple spray vapour locks 310 can be evenly arranged in the steam diffuser casing bottom side.This
Sample is convenient for spraying steam from multiple positions, to simulate the situation that more people breathe generation steam.
Moreover, the control device include control circuit 500, the first power controller 210 being connected with the heater,
And the steam flow sensor 220 on the steam outlet pipe 700 of the heated shell is arranged at, the steam flow sensor 220
It is communicated to connect with the first power controller 210 with the control circuit 500.By setting described in the control device
One power controller 210 and steam flow sensor 220 can utilize the steam flow sensor 220 to generate heater
Steam flow be detected, and according to testing result using first power controller 210 to the power of the heater
It is adjusted, so as to which thermogenetic steam flow be added to be adjusted to heater.So as to form steam looped system,
Quantity of steam can accurately be detected, so that the generation of quantity of steam is accurately controllable.
Further, the steam flow sensor 220 may be configured as mass flow sensor, the mass flow sensing
Device flows through the quantity of steam (also can be seen as thermogenetic quantity of steam added by the heater) of the steam outlet pipe for detecting.
In GB11555-2009 standards, quantity of steam refers to the quality of the water of evaporation in the unit interval, i.e., is represented with mass flow, and
The volume flow of steam can only be detected during detection, therefore relates to the water of certain mass be converted into the water of certain volume herein
Steam problem.Vapor is the gaseous form that liquid water is heated and become, and the water of certain mass becomes vapor by heating
Volume is not necessarily related with ambient temperature and pressure.For the steam generator, steam is by the way that water is heated
It is generated to boiling point, working environment pressure is also near standard atmospheric pressure, thus, it is possible to be calculated according to ideal gas behavior formula
Go out the water of certain mass by adding thermogenetic vapor volume.So ideal gas behavior formula can be rewritten as：
PV=mRT
Wherein：P is pressure, unit Pa；V is vapor volume, unit m3；M be water quality, unit kg；T is
Temperature, unit K；R is a proportionality coefficient.However, one will appreciate that in this application, pressure p can be regarded as standard atmospheric pressure, and water
Quality m can basis, temperature T is also knowable (because being to heat the water to vapor obtained from boiling point vaporization).According to
Code requirement, the steam generator, which needs to simulate, generates the vapor that n passengers breathe out.Therefore, according to coideal gas
Body state equation can calculate the vapour volume flow of steam generator.Further according to vapour volume flow and quality of steam stream
Vapour volume flow rate conversion can be steam mass flow by the conversion relation between amount.
In addition, the control device further includes the 410 and second power control of Rotating speed measring structure being connected with the wind turbine 400
Device 420 processed, 410 and second power controller 420 of Rotating speed measring structure are communicated to connect with the control circuit 500.It is logical
The mass flow sensor is crossed to be monitored the steam occurrence quantity of the heating unit 200, the vapor volume detected is anti-
The control circuit 500 is fed to, the control circuit 500 can adjust the heating work(of the heating unit 200 according to feedback
The rotating speed of rate and the wind turbine 400, so as to generate the vapor volume of requirement before the deadline.When steam occurrence quantity reaches requirement
Specified value after, begin to carry out to be ejected into the surface of test piece and be tested.Moreover, the Rotating speed measring structure 410 can be with
The actual speed of the wind turbine 400 is detected, it is described when needing to reduce the vapor that the steam diffuser casing 300 discharges
Control circuit 500 can reduce the power of the wind turbine 400 using second power controller 420, to reduce the wind turbine
400 rotating speed；When needing to increase the vapor that the steam diffuser casing 300 discharges, the control circuit 500 can profit
Increase the power of the wind turbine 400 with second power controller 420, to improve the rotating speed of the wind turbine 400.And pass through institute
The actual speed of the wind turbine 400 can accurately be detected by stating Rotating speed measring structure 410, so as to turning to the wind turbine 400
Speed is accurately adjusted, and this makes it possible to the quantity of steam being discharged to the outside to the steam diffuser casing 300 accurately to be adjusted.
In addition, the steam generator further includes the human-computer interaction structure 600 being arranged in the shell structure 101, institute
Human-computer interaction structure 600 is stated to communicate to connect with the control circuit 500.Moreover, the human-computer interaction structure 600 includes being arranged at
Interactive display and control button in the shell structure 101, the interactive display and control button with the control
Circuit 500 communicates to connect.Various test parameters can be set by the interactive display and control button, parameter includes boosting speed
Rate (or time), atmospheric pressure value, pressure hold time, rate of pressure reduction (or time), atmospheric pressure value allowable fluctuation range etc., can also be to institute
The parametric synthesis such as heating unit, the rotating speed of the wind turbine, time, water level and vapor volume are stated to detect and control.It is man-machine by setting
Interactive structure 600 more easily can be controlled and detected to whole equipment.In addition it is also possible to by the human-computer interaction knot
Structure 600 is provided separately with the water tank, heating unit, steam exhaust device, and by the control circuit 500 and the human-computer interaction knot
Structure 600 is set together, and the two is arranged at outside environment temperature simulation device, avoids being influenced be subject to experimental enviroment.
In addition, the steam generator further include it is electric with the control circuit 500, heating unit 200 and steam exhaust device
The power module 800 of connection and the liquid level detecting sensor being arranged in the heated shell, the liquid level detecting sensor
It is communicated to connect with the control circuit 500.It can be to the control circuit 500, heating unit by the power module 800
200th, steam exhaust device is powered.Moreover, also by setting the liquid level detecting sensor in the heating unit 200, it can be right
The liquid level of water is detected in real time in the heated shell, when water level is relatively low in the heated shell or during water shortage, the control
Circuit 500 processed can control disconnection to avoid that dry combustion method occurs and generates danger to the heating installation power supply, provide power-off protection work(
Energy.
The utility model proposes steam generator include water tank, heating unit, wind turbine, vapor volume monitoring device (i.e. matter
Measure flow sensor and the first power controller), control structure (referring mainly to the control circuit) and man-machine interface (i.e. described people
Machine interactive structure) it forms, realize the control to steam occurrence quantity by gas mass flow rate sensors；By control device to heating
The comprehensive parameters such as device, rotation speed of fan, time, water level and vapor volume detect and control, by man-machine interface and operating personnel into
Row is interactive, realizes intelligence, automatically controls.And the automobile window glass defrosting-defogging performance detection comprising the steam generator
System, meet GB11555-2009 and GB11556-2009 to the regulation of glass for vehicle window defrosting, fog removal performance and test method and
It is required that the detection of the automobile window glass defrosting-defogging performance suitable for various；By setting steam looped system,
Realize the controllable precise of quantity of steam；It realizes the automation of detection device, reduces and adjust error, more accurately reappear automobile air window glass
The frost mist environment that glass is subjected in actual use；The degree of automation and standardized level of high gas pressure test are helped to improve, it is right
The similar experiment such as airborne equipment high gas pressure test and water depth pressure experiment has significant demonstration effect.
In addition it is also necessary to understand, in the present embodiment, term " under ", " on ", "front", "rear", "left", "right",
" interior ", " outer ", " top ", " bottom ", " one side ", " opposite side ", " one end ", " other end ", etc. indicated by position relationship be based on
Position relationship shown in the drawings；The terms such as " first ", " second " are to distinguish different structure members.These terms are only
It is described convenient for description the utility model and simplifying, it is impossible to be interpreted as the limitation to the utility model.
Each technical characteristic of embodiment described above can be combined arbitrarily, to make description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, the scope that this specification is recorded all is considered to be.
Embodiment described above only expresses the several embodiments of the utility model, and description is more specific and detailed,
But therefore it can not be interpreted as the limitation to utility model patent scope.It should be pointed out that the common skill for this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The scope of protection of the utility model.Therefore, the protection domain of the utility model patent should be determined by the appended claims.
Claims (10)
1. a kind of steam generator, which is characterized in that including water tank, the heating unit connected with the water tank, with the heating
The steam exhaust device of device connection and the control device being connected with the heating unit and steam exhaust device；
The heating unit is including the heated shell connected with the water tank, the heater being arranged in the heated shell, with
And connection is arranged at the steam outlet pipe in the heated shell, the steam exhaust device is connected with the steam outlet pipe；
The control device includes control circuit, the first power controller be connected with the heater and described in being arranged at
Steam flow sensor on the steam outlet pipe of heated shell, the steam flow sensor and the first power controller with it is described
Control circuit communicates to connect.
2. steam generator according to claim 1, which is characterized in that the steam flow sensor is arranged to quality stream
Quantity sensor, the mass flow sensor flow through the quantity of steam of the steam outlet pipe for detecting.
3. steam generator according to claim 1, which is characterized in that the steam exhaust device includes connecting with the steam outlet pipe
Logical steam diffuser casing and the spray vapour lock being arranged on the steam diffuser casing.
4. steam generator according to claim 3, which is characterized in that the steam diffuser casing is arranged to cylindric, more
A spray vapour lock is evenly arranged in the steam diffuser casing bottom side.
5. steam generator according to claim 3, which is characterized in that the steam exhaust device, which further includes, is arranged at the steaming
Wind turbine at the top of vapour diffuser casing；
And the control device further includes the Rotating speed measring structure being connected with the wind turbine and the second power controller, the rotating speed
Detection structure and the second power controller are communicated to connect with the control circuit.
6. according to the steam generator described in claim 1-5 any one, which is characterized in that insulation shell is further included, it is described
Water tank, heating unit, steam exhaust device may be contained in the insulation shell, and the steam exhaust device is provided projectingly on the heat preservation
Case top.
7. steam generator according to claim 6, which is characterized in that further include the people being arranged on the insulation shell
Machine interactive structure, the human-computer interaction structure are communicated to connect with the control circuit.
8. steam generator according to claim 7, which is characterized in that the human-computer interaction structure includes being arranged at described
Interactive display and control button on insulation shell, the interactive display and control button communicate with the control circuit
Connection.
9. according to the steam generator described in claim 1-5 any one, which is characterized in that further include and the control electricity
The power module and the level sensing biography being arranged in the heated shell that road, heating unit and steam exhaust device are electrically connected
Sensor, the liquid level detecting sensor are communicated to connect with the control circuit.
10. a kind of automobile window glass defrosting-defogging performance detecting system, which is characterized in that including environment temperature simulation device,
Testboard in the environment temperature simulation device, be arranged on the testboard such as claim 1-9 any one
The steam generator, the test specimen being removably fixed on the testboard and with the environment temperature simulation device, steam
Vapour generator and the control mechanism of test specimen connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721570589.4U CN207438547U (en) | 2017-11-20 | 2017-11-20 | Steam generator and automobile window glass defrosting-defogging performance detecting system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721570589.4U CN207438547U (en) | 2017-11-20 | 2017-11-20 | Steam generator and automobile window glass defrosting-defogging performance detecting system |
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| CN207438547U true CN207438547U (en) | 2018-06-01 |
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ID=62287219
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107702081A (en) * | 2017-11-20 | 2018-02-16 | 广电计量检测（武汉）有限公司 | Steam generator and automobile window glass defrosting-defogging performance detecting system |
| CN111823820A (en) * | 2020-08-03 | 2020-10-27 | 安徽江淮汽车集团股份有限公司 | Method and device for detecting defrosting performance of automobile, storage medium and device |
| US20220013823A1 (en) * | 2018-11-14 | 2022-01-13 | 3M Innovative Properties Company | Methods of identifying an overheating event in a battery cell single-phase immersion cooling system |
-
2017
- 2017-11-20 CN CN201721570589.4U patent/CN207438547U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107702081A (en) * | 2017-11-20 | 2018-02-16 | 广电计量检测（武汉）有限公司 | Steam generator and automobile window glass defrosting-defogging performance detecting system |
| US20220013823A1 (en) * | 2018-11-14 | 2022-01-13 | 3M Innovative Properties Company | Methods of identifying an overheating event in a battery cell single-phase immersion cooling system |
| CN111823820A (en) * | 2020-08-03 | 2020-10-27 | 安徽江淮汽车集团股份有限公司 | Method and device for detecting defrosting performance of automobile, storage medium and device |
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Address after: 430070 No. 488, LUMO Road, Hongshan District, Wuhan City, Hubei Province Patentee after: GRG METROLOGY & TEST (WUHAN) CO.,LTD. Patentee after: Radio and TV Measurement and Testing Group Co.,Ltd. Address before: 430070 No. 488, LUMO Road, Hongshan District, Wuhan City, Hubei Province Patentee before: GRG METROLOGY & TEST (WUHAN) CO.,LTD. Patentee before: GUANGZHOU GRG METROLOGY & TEST Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder |