CN109612110A - Novel combustion system and gas water heater - Google Patents

Novel combustion system and gas water heater Download PDF

Info

Publication number
CN109612110A
CN109612110A CN201811339178.3A CN201811339178A CN109612110A CN 109612110 A CN109612110 A CN 109612110A CN 201811339178 A CN201811339178 A CN 201811339178A CN 109612110 A CN109612110 A CN 109612110A
Authority
CN
China
Prior art keywords
combustion
air
blower
gas
stomata
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
Application number
CN201811339178.3A
Other languages
Chinese (zh)
Inventor
刘相友
王为泽
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Lingyi Electric Technology Co ltd
Original Assignee
Guangdong Lingyi Electric Technology Co ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Guangdong Lingyi Electric Technology Co ltd filed Critical Guangdong Lingyi Electric Technology Co ltd
Priority to CN201811339178.3A priority Critical patent/CN109612110A/en
Publication of CN109612110A publication Critical patent/CN109612110A/en
Pending legal-status Critical Current

Links

Classifications

    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24HEATING; RANGES; VENTILATING
    • F24HFLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00Details
    • F24H9/18Arrangement or mounting of grates or heating means
    • F24H9/1854Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1877Arrangement or mounting of combustion heating means, e.g. grates or burners
    • F24H9/1881Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/62Mixing devices; Mixing tubes

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)

Abstract

The invention provides a novel combustion system and a gas water heater, which comprises a combustion device and a fan arranged at an air inlet of the combustion device, wherein the combustion device is provided with an air mixing cavity and a combustion plate, the combustion plate is arranged on the air mixing cavity, the combustion plate is provided with a plurality of tiny holes, the air mixing cavity is connected with the air inlet, the air inlet is provided with an impeller, the fan is connected with a combustor, the impeller is arranged at the air inlet of the combustion chamber to improve the mixing degree of gas and air, meanwhile, the fan blows air into the combustion chamber to improve the oxygen concentration in the combustion chamber, reduce the generation of nitrogen oxides and simultaneously improve the air outlet speed of the tiny holes of the combustion plate, so that the air outlet speed is higher than the combustion speed, effectively prevent backfire, simultaneously change the structure of the traditional combustor, and greatly reduce the internal space of a gas water heater and a wall-hanging furnace, improve combustion efficiency and reduce the generation of carbon monoxide and nitrogen oxides.

Description

A kind of new combustion systems and gas-fired water heater
Technical field
The present invention relates to a kind of new combustion systems and gas-fired water heaters.
Background technique
Nitrogen oxides is common air pollutants, is often referred to nitric oxide and nitrogen dioxide, is often indicated with N02.One oxygen Change the gas that nitrogen is a kind of colorless and odorless, is slightly soluble in water.Nitrogen dioxide can be rapidly gone in air.Nitrogen dioxide is irritating Property, be at room temperature rufous, have stronger corrosivity and oxidisability, it is soluble easily in water, can be formed under effect of sunlight NO and 03.(nitrogen oxide mass concentration is about in 0.20mg/m3 in air) Pulmonary Function in Children and breathing system in nitrogen oxides high pollution area Disease incidence of uniting is relatively high.Foreign countries' investigation shows the children that Respiratory symptoms and disease are suffered from using coal gas family Ratio increases, and Pulmonary Function in Children is substantially reduced.Nitrogen oxides to human body generate damaging effect threshold mass concentration be 0.31~ 0.62mg/m3
NO formation mechanism: the NOx in flue gas is mainly NO, accounts for about 90% or so, is discharged into after atmosphere partially oxygen again It is melted into NO2, therefore the formation mechanism of NOx is studied, mainly study the formation mechanism of NO.The generation form of NO has fuel type, temperature Type and three kinds of fast temperature type.The NO that combustion process generates, mainly temperature mode NO (T-NO), some fast temperature Type NO (P-NO), also known as instantaneous NO.T-NO formation mechanism: T-NO is that the nitrogen and oxygen in air generate at high temperature, Its formation mechanism is to be proposed by former Soviet Union scientist Zeldvich in 1964.When the mixture combustion of combustion gas and air, The key reaction process chemistry reaction for generating NO is as follows:
N2+ O=NO+N
N+O2=NO+O is (2)
By the experimental result of kinetics equation and Zeldvich, the formation speed of NO can be indicated are as follows:
D [NO]/dt=3 × 1014[N2][O2]1/2e-542COD/RT (3)
(3) in formula: [NO], [N2], the concentration (gmol/cm of [O2]-NO, N2, O22)
Mono- time (s) of t
T mono- reacts absolute temperature (K)
Mono- universal gas constant of R (J/gmol.K)
It is big to oxygen concentration, the few premixed flame of fuel, with the NO production quantity of (3) formula calculating, calculated result and reality Border result is substantially uniform.But when being less than stoichiometric ratio, i.e. fuel overrich, there is also following reactions:
N+OH=NO+H
From (3) formula it is found that NO formation speed and T, [N2]、[O2] related, when being burnt in air due to combustion gas, nitrogen is dense Degree varies less, therefore [N2] very little, [O in (3) formula are influenced on NO formation speed2] depend on combustion gas and air in combustion process Equivalent proportion, so the temperature and equivalent proportion of combustion process are very big on the generation of NO influence, when ignition temperature is lower than 1500 degrees Celsius When, T-NO production quantity is few, and when ignition temperature is higher than 1500 degrees Celsius, T-NO production quantity is significantly increased.The every increase of temperature 100K, NO formation speed about increase 5 times, and the production quantity of NO increases and proportional increase in excessive fuel with oxygen concentration. Ignition temperature is equal near 1 in equivalent proportion there is maximum value, and corresponding NO speed also reaches maximum value.It is remote in excess air coefficient When from 1, the formation speed of NO will be drastically reduced.The production quantity of NO increases with residence time of the flue gas in high-temperature region and is increased simultaneously Greatly.In addition, the activation energy of reaction is reacted than combustible component in elemental oxygen and fuel due to (1) formula, that is, elemental oxygen O and nitrogen molecular N Activation energy it is big, therefore the formation speed of NO is slower than combustion reaction, so a large amount of NO will not be generated in flame, the generation of NO Journey is carried out in the rear end of flame zone, that is to say, that is largely generated in flame downstream.It is generated in conclusion influencing T-N0 Principal element be temperature, oxygen concentration and residence time.
Summary of the invention
The purpose of the invention is to overcome the shortcoming in the prior art, a kind of new combustion systems and combustion gas are provided Impeller is arranged by connecting in blower with burner, and in the air inlet of combustion chamber to improve combustion gas and air in hot water apparatus Degree of mixing, while by blower air blast into combustion chamber, the indoor oxygen concentration that burns is improved, reduces the generation of nitrogen oxides simultaneously The outlet speed of the microscopic pinholes of burner plate can be improved, so that outlet speed is greater than burning velocity, effectively prevent being tempered, simultaneously The structure for changing conventional burners greatly reduces the inner space of gas heater and wall-hung boiler, improves efficiency of combustion, drop The generation of low CO and nitrogen oxides.
In order to achieve the above object, the present invention uses following scheme:
A kind of new combustion systems, the blower including burner and the air inlet for being set to burner, the combustion It burns device and is provided with mixed air cavity and burner plate, the burner plate setting is provided with multiple micro- on mixed air cavity on the burner plate Small Holes, the mixed air cavity connect air inlet, are provided with impeller on the air inlet.
In one or more embodiments, it is provided with multiple grids on the burner plate, is provided between adjacent two grid Groove, the microscopic pinholes are set on the grid.
In one or more embodiments, the microscopic pinholes include the first stomata and the second stomata, first stomata Aperture is greater than second air vent aperture, and the quantity of first stomata is much smaller than the aperture of the second stomata.
In one or more embodiments, the first stomata is set to light a fire, remaining grid is equal in one in multiple grids It is provided with the first stomata and the second stomata.
In one or more embodiments, the blower connects valve body, and the combustion gas and air that tentatively mix are passed through air inlet Mouth is sent into mixed air cavity and then is sprayed again from microscopic pinholes after secondary mixing, and the wind speed of the outlet side of microscopic pinholes is greater than gaseous mixture The speed of volumetric combustion.
In one or more embodiments, the blower is variable-frequency motor.
In one or more embodiments, baroceptor, the baroceptor are additionally provided in the mixed air cavity And blower also with a control module be electrically connected, the control module according to the data of baroceptor control blower revolving speed with So that the wind speed of microscopic pinholes outlet side is greater than the speed of mixed gas burning.
In one or more embodiments, combustion chamber, the side of the combustion chamber are additionally provided with above the burner On be provided with ignition electrode, the ignition electrode is close to the grid for being respectively provided with the first stomata.
In one or more embodiments, heat exchanger, the collection cigarette of the heat exchanger are provided with above the combustion chamber Be provided with oxygen level sensor on cover, be additionally provided with control module, the control module respectively with oxygen level sensor and wind Machine is electrically connected, the revolving speed for the oxygen content data control blower which feeds back according to oxygen level sensor.
In one or more embodiments, the side plate of the combustion chamber is made into using thermal insulation material, and the heat exchanger is set It is placed in the top of combustion chamber.
A kind of gas-fired water heater, including above-mentioned new combustion systems.
The utility model has the advantages that the present invention provides a kind of new combustion systems and gas-fired water heater, by blower and burner Connection, and impeller is set to improve the degree of mixing of combustion gas and air in the air inlet of combustion chamber, while passing through blower to combustion chamber Interior air blast improves the indoor oxygen concentration that burns, and reduces the generation of nitrogen oxides while the microscopic pinholes of burner plate can be improved Outlet speed effectively prevent being tempered, has changed simultaneously the structure of conventional burners, pole so that outlet speed is greater than burning velocity The inner space of gas heater and wall-hung boiler is reduced greatly, improves efficiency of combustion, reduces the production of carbon monoxide and nitrogen oxides It is raw.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of new combustion systems of the embodiment of the present invention.
Fig. 2 is the fractionation structural representation of new combustion systems of the embodiment of the present invention.
Fig. 3 is the burner plate structural schematic diagram of new combustion systems of the embodiment of the present invention.
Fig. 4 is the part enlarged structure schematic diagram of the burner plate of new combustion systems of the embodiment of the present invention.
Fig. 5 is the mixed air cavity structural schematic diagram of new combustion systems of the embodiment of the present invention.
Fig. 6 is the another side structural schematic diagram of new combustion systems of the embodiment of the present invention.
Fig. 7 is the control framework figure of the control module of new combustion systems of the embodiment of the present invention.
Specific embodiment
As follows in conjunction with attached drawing, application scheme is further described:
Embodiment:
Referring to attached drawing 1-7, a kind of new combustion systems including burner 1 and are set to the air inlet of burner 1 Blower 2, the burner 1 is provided with mixed air cavity 11 and burner plate 12, and the burner plate 12 is set on mixed air cavity 11, institute It states and is provided with multiple microscopic pinholes 121 on burner plate 12, the mixed air cavity 11 connects air inlet, is provided with leaf on the air inlet Wheel 13, the air inlet sucking air of blower 2 and combustion gas form mixed gas, and mixed gas is sent under the action of blower to air inlet To improve combustion after the rotation of impeller 13 and stirring are mixed for the second time and are sent to progress third time mixing in mixed air cavity 11 Efficiency is burnt, so that fuel gas buring is complete, by blower 2 to air blast in burner 1, the speed for improving combustion gas makes the speed of combustion gas Greater than the burning velocity of combustion gas to prevent from being tempered, while burner plate 12 is quickly taken away during then by the wind of blower 2 Heat make the temperature at burner plate 12 be reduced to 1500 degrees Celsius hereinafter, avoid high-temp combustion generate nitrogen oxides, fire simultaneously Flue gas after burning reduces the time for resting on high-temperature region under the action of blower 2, by blower 2 to air-blowing in mixed air cavity 11, The ratio for improving oxygen in mixed gas makes oxygen and gas proportion be greater than 1, so that greatly reducing nitrogen oxides Generation.
Further, it is provided with multiple grids on the burner plate 12, fluted 123 are arranged between adjacent two grid to add There are the spaces that burner plate 12 expands with heat and contract with cold simultaneously for the intensity of strong burner plate 12, and burner plate 12 is avoided to cause out because expanding with heat and contract with cold It splits, the microscopic pinholes 121 are set on the grid.
Further, the microscopic pinholes 121 include the first stomata 1211 and the second stomata 1212, first stomata 1211 apertures are greater than second air vent aperture 1212, and the quantity of first stomata 1211 is much smaller than the second stomata 1212 Aperture makes combustion gas throughput different by different pore size, and suitable a large amount of combustion gas of big first stomata 1211 in aperture pass through generation High-power, the second stomata 1212 of small-bore is suitble to a small amount of combustion gas by generating small-power, so that the power of fuel gas buring can be with From high-power to small-power transition, meet demand of the user to the hot water of different temperatures.
Further, the first stomata 1211 is arranged in one in multiple grids to discharge to light a fire by the first stomata 1211 A large amount of combustion gas, are convenient for rapid-ignition, remaining grid is provided with the first stomata 1211 and the second stomata 1212 to form multiple fire Point, to improve combustion rate, avoid all be imperfect combustion under the first stomata 1211 and be all the second stomata 1212 combustion Underpower after burning.
Further, the blower 2 connects valve body, and the combustion gas and air tentatively mixed is sent into mixed air cavity by air inlet In 11 and then secondary be blended in from microscopic pinholes 121 sprays, and the wind speed of the outlet side of microscopic pinholes 121 burns greater than mixed gas Speed.
Further, the blower 2 is variable-frequency motor to realize electrodeless variable-speed.
Further, baroceptor is additionally provided in the mixed air cavity 11, the baroceptor and blower 2 are also It is electrically connected with a control module, which controls the revolving speed of blower 2 so that fine according to the data of baroceptor The wind speed of aperture outlet side is greater than the speed of mixed gas burning to prevent non-return fire.
Preferably, when the data of baroceptor 15 are less than setting value, control module controls blower 2 and improves revolving speed, thus The combustion gas wind speed for improving microscopic pinholes 121 avoids being tempered, and when the data of baroceptor 15 are greater than the set value, control module is controlled Blower 2 lowers revolving speed, while guaranteeing that the combustion gas wind speed of microscopic pinholes 121 is slightly above fuel gas buring speed, is avoided simultaneously with energy conservation Tempering.
Further, it is additionally provided with combustion chamber above the burner 1, igniting is provided on the side of the combustion chamber Needle, the ignition electrode is close to the grid for being respectively provided with the first stomata 1211.
Further, it is provided with heat exchanger above the combustion chamber, be arranged on the exhaust fume collecting hood of the heat exchanger aerobic Content level sensor 14, is additionally provided with control module, which electrically connects with oxygen level sensor 14 and blower 2 respectively It connects, the revolving speed for the oxygen content data control blower 2 which feeds back according to oxygen level sensor 14.
2 revolving speed of blower is adjusted by the oxygen content of the exhaust fume collecting hood on detection heat exchanger, if oxygen content is lower than setting value, 2 revolving speed of blower is then improved, reduces revolving speed if oxygen content high pressure set point, is come so that oxygen content and the concentration of nitrogen content ratio are greater than 1 so that reduce the generation of nitrogen oxides, while guarantee that the combustion gas wind speed of the microscopic pinholes of burner plate is greater than the burning velocity of combustion gas To prevent non-return fire.
Further, the side plate of the combustion chamber uses thermal insulation material to be made into reduce the loss of flue gas heat, the heat Exchanger is set to the top of combustion chamber, and multiple heat exchanging fins are provided on the heat exchanger, wears on the heat exchanging fin and is connected to water Pipe is to carry out heat exchange.
A kind of gas-fired water heater, including above-mentioned new combustion systems, the gas-fired water heater is gas heater Or wall-hung boiler.
It is that above-mentioned preferred embodiment should be regarded as application scheme embodiment for example, all with application scheme thunder Same, approximate or technology deduction, replacement, improvement for making based on this etc., are regarded as the protection scope of this patent.

Claims (10)

1. a kind of new combustion systems, which is characterized in that the wind including burner and the air inlet for being set to burner Machine, the burner are provided with mixed air cavity and burner plate, and the burner plate is set on mixed air cavity, are arranged on the burner plate There are multiple microscopic pinholes, the mixed air cavity connects air inlet, is provided with impeller on the air inlet.
2. new combustion systems according to claim 1, which is characterized in that multiple grids are provided on the burner plate, It is arranged fluted between adjacent two grid, the microscopic pinholes are set on the grid.
3. new combustion systems according to claim 2, which is characterized in that the microscopic pinholes include the first stomata and the Two stomatas, first air vent aperture are greater than second air vent aperture, and the quantity of first stomata is much smaller than the second stomata Aperture.
4. new combustion systems according to claim 3, which is characterized in that the first gas is arranged in one in multiple grids To light a fire, remaining grid is provided with the first stomata and the second stomata in hole.
5. new combustion systems according to claim 1, which is characterized in that the blower connects valve body, preliminary mixing Combustion gas and air be sent into mixed air cavity after secondary mixing by air inlet and sprayed again from microscopic pinholes, microscopic pinholes out The wind speed at gas end is greater than the speed of mixed gas burning, and the blower is variable-frequency motor.
6. new combustion systems according to claim 7, which is characterized in that be additionally provided with air pressure transmission in the mixed air cavity Sensor, the baroceptor and blower are also electrically connected with a control module, and the control module is according to baroceptor Data control the revolving speed of blower so that the wind speed of microscopic pinholes outlet side is greater than the speed of mixed gas burning.
7. new combustion systems according to claim 4, which is characterized in that be additionally provided with burning above the burner Chamber is provided with ignition electrode on the side of the combustion chamber,
The ignition electrode is close to the grid for being respectively provided with the first stomata.
8. new combustion systems according to claim 7, which is characterized in that be provided with heat exchange above the combustion chamber Device is provided with oxygen level sensor on the exhaust fume collecting hood of the heat exchanger, is additionally provided with control module, control module difference It is electrically connected with oxygen level sensor and blower, which controls according to the oxygen content data that oxygen level sensor is fed back The revolving speed of blower.
9. new combustion systems according to claim 8, which is characterized in that the side plate of the combustion chamber uses thermal insulation material It is made into, the heat exchanger is set to the top of combustion chamber.
10. a kind of gas-fired water heater, including new combustion systems described in any one of claim 1-9.
CN201811339178.3A 2018-11-12 2018-11-12 Novel combustion system and gas water heater Pending CN109612110A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201811339178.3A CN109612110A (en) 2018-11-12 2018-11-12 Novel combustion system and gas water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201811339178.3A CN109612110A (en) 2018-11-12 2018-11-12 Novel combustion system and gas water heater

Publications (1)

Publication Number Publication Date
CN109612110A true CN109612110A (en) 2019-04-12

Family

ID=66004130

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201811339178.3A Pending CN109612110A (en) 2018-11-12 2018-11-12 Novel combustion system and gas water heater

Country Status (1)

Country Link
CN (1) CN109612110A (en)

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07158875A (en) * 1993-12-01 1995-06-20 Atamu Giken Kk Gas hot-water supplier
JP2015017759A (en) * 2013-07-11 2015-01-29 リンナイ株式会社 Combustion plate
CN105042862A (en) * 2015-08-22 2015-11-11 黎素云 Closed loop combustion heating control method and system for gas appliance
CN105114953A (en) * 2015-09-22 2015-12-02 安徽华菱西厨装备股份有限公司 Full-mixed fuel gas combusting heater and control method thereof
CN206112926U (en) * 2016-10-08 2017-04-19 北京庆东纳碧安热能设备有限公司 Burner assembly
CN107448938A (en) * 2016-06-01 2017-12-08 上海钜荷热力技术有限公司 A kind of interior circulating flue gas reverse-flow type all-premixing burner
CN108488795A (en) * 2018-05-21 2018-09-04 北京联众华禹环保科技有限公司 A kind of porous nozzles and gas water jacket furnace low NO
CN209944761U (en) * 2018-11-12 2020-01-14 广东零壹电器科技有限公司 Novel combustion system and gas water heater

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07158875A (en) * 1993-12-01 1995-06-20 Atamu Giken Kk Gas hot-water supplier
JP2015017759A (en) * 2013-07-11 2015-01-29 リンナイ株式会社 Combustion plate
CN105042862A (en) * 2015-08-22 2015-11-11 黎素云 Closed loop combustion heating control method and system for gas appliance
CN105114953A (en) * 2015-09-22 2015-12-02 安徽华菱西厨装备股份有限公司 Full-mixed fuel gas combusting heater and control method thereof
CN107448938A (en) * 2016-06-01 2017-12-08 上海钜荷热力技术有限公司 A kind of interior circulating flue gas reverse-flow type all-premixing burner
CN206112926U (en) * 2016-10-08 2017-04-19 北京庆东纳碧安热能设备有限公司 Burner assembly
CN108488795A (en) * 2018-05-21 2018-09-04 北京联众华禹环保科技有限公司 A kind of porous nozzles and gas water jacket furnace low NO
CN209944761U (en) * 2018-11-12 2020-01-14 广东零壹电器科技有限公司 Novel combustion system and gas water heater

Similar Documents

Publication Publication Date Title
CN107420892A (en) A kind of outer circulation smoke backflow formula all-premixing burner
CN202012913U (en) Novel flue gas self-reflux low-oxygen combustor
CN205137854U (en) Gas water heater
CN107448938A (en) A kind of interior circulating flue gas reverse-flow type all-premixing burner
CN205979772U (en) Outer recirculated flue gas backward flow formula full premix combustor
CN106642646A (en) Gas water heater and control method thereof
CN106907712A (en) The gas nozzle of ultralow nitrogen suspension combustion flame
CN205137852U (en) Gas water heater
CN208108090U (en) A kind of ultralow nitrogen metal fiber surface combustor
CN209944761U (en) Novel combustion system and gas water heater
CN109612110A (en) Novel combustion system and gas water heater
CN204254612U (en) A kind of fully pre-mixing gas combustion burner of low nox emission
CN207196910U (en) A kind of gas heater
CN206037389U (en) Gas water heater
CN207006208U (en) The combustion gas furnace to be heated up for flue gas in industrial waste gas denitration
CN109912188A (en) A kind of combustion-type glass tempering heating device and operating method
CN205746815U (en) Low-NOx coal powder system
CN201666574U (en) Reverse flow heat-exchanging catalytic combustor without ignition device
CN2830902Y (en) Full premixed burner of gas water heater
CN210486040U (en) Combustion heat exchange equipment
CN210861719U (en) Novel low-nitrogen energy-saving hot water unit
CN103398397A (en) Combustion system of boiler and combustion method implemented by aid of system
CN209229758U (en) A kind of high concentration incinerator of combustable gas and system
CN207797383U (en) Boiler plant and heating system
CN207006133U (en) Low nitrogen pulverized coal combustion system

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

Application publication date: 20190412