CN107062619A - A kind of anti-dry burning device - Google Patents
A kind of anti-dry burning device Download PDFInfo
- Publication number
- CN107062619A CN107062619A CN201710120982.1A CN201710120982A CN107062619A CN 107062619 A CN107062619 A CN 107062619A CN 201710120982 A CN201710120982 A CN 201710120982A CN 107062619 A CN107062619 A CN 107062619A
- Authority
- CN
- China
- Prior art keywords
- resistance
- diode
- amplifier
- relay
- anode
- 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
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
Abstract
The invention discloses a kind of anti-dry burning device, wherein one end of transmitter is connected by resistance R2 and the first power supply, one end of receiver and amplifier OA positive input are connected by resistance R3 and the first power supply, adjustable resistance R1 adjustable end and amplifier OA inverting input connection, the negative electrode of amplifier OA output end and resistance R4 one end with diode D2 is connected, diode D2 anode and the control end of switching tube are connected, one end of diode D1 anode and relay KA coil is connected with the input of switching tube, relay KA tip side is connected by resistance R7 with AC power.The advantage of the invention is that detecting water-flow signal in outer water tube by infrared detector, and the working condition of outside heat-generating pipe is controlled by water-flow signal, prevent heat-generating pipe from occurring the danger of dry combustion method, improve security performance and the life-span of Instant heating type heating system.
Description
Technical field
The present invention relates to family's electro-technical field, more particularly to a kind of anti-dry burning device.
Background technology
Instant heating type drinking machine (water heater) be it is a kind of can be by high-power heater element come the drinking-water of quick flow heated water
Machine (water heater), mainly controls water temperature, flow velocity, power etc. by circuit, make water temperature reach it is suitable the need for temperature；Instant heating type drink
Water dispenser (water heater) because its there is instant-heating, heating can be started in the several seconds the characteristics of, and be widely applied.
Instant heating type drinking machine (water heater) mainly includes high-power heater, circuit temperature control system, water pump or (electromagnetism
Valve), function fix frame member etc..Because the power of heater is larger, it can be common that single 2200W, 3000W, or even 5000W
Deng.Widely used at present is stainless steel thick film heating pipe 03, and because stainless steel tube wall thickness is thin, heat quickly can be for delivery to current
In, therefore efficiency is very high, but also bring difficulty to excessive low water level protection simultaneously.Because power density is big, generated heat under dry-fire condition
Pipe 03 can meet or exceed 500 DEG C in 5 seconds, and directly heat-generating pipe 03 is burnt.Most kick protection switch in the market
The protection switch of isothermal degree type, can not all be protected to heat-generating pipe 03, because temperature protection switch did not react also very well
Come, heat-generating pipe 03 has burnt.So if dry combustion method can be solved the problems, such as by other means, Instant heating type drink is just greatly improved
The security performance and service life of water dispenser (water heater).
The content of the invention
In order to overcome the deficiencies in the prior art, it is an object of the invention to provide a kind of anti-dry burning device, it can be improved i.e.
The security performance and service life of heating water heater.
The purpose of the present invention is realized using following technical scheme：
A kind of anti-dry burning device, including infrared detector TR, adjustable resistance R1, resistance R2, resistance R3, resistance R4, resistance
R7, amplifier OA, switching tube, relay KA, diode D1 and diode D2；Infrared detector TR includes receiver, and with connecing
Receive the transmitter that device matches；
One end of transmitter is connected by resistance R2 and the first power supply, one end of receiver and amplifier OA positive input
Connected by resistance R3 and the first power supply, adjustable resistance R1 adjustable end and amplifier OA inverting input connection, amplifier OA
Output end and resistance R4 negative electrode of the one end with diode D2 be connected, diode D2 anode and the control end of switching tube connect
Connect, one end of diode D1 anode and relay KA coil is connected with the input of switching tube, relay KA contact
End is connected by resistance R7 with AC power；
The resistance R4 other end, the power end of amplifier, adjustable resistance R1 one end, diode D1 negative electrode and relay KA
Coil the other end and the first power supply connection；The other end of transmitter, the other end of receiver, the output end of switching tube, MCU
Ground terminal, the adjustable resistance R1 other end and amplifier OA ground terminal is grounded；The contact that outside heat-generating pipe passes through relay KA
End and AC power connection.
Preferably, also including MCU, resistance R5 and resistance R6；
The negative electrode of amplifier OA output end, resistance R4 one end and diode D2 is connected with MCU input, MCU's
Output end and resistance R5 one end connection, one end of the resistance R5 other end, diode D2 anode and resistance R6 with switch
The control end of pipe；MCU power end and the connection of the first power supply, resistance R6 other end ground connection.
Preferably, MCU is additionally operable to the level signal sent according to amplifier OA, alarm signal is sent to outside control
Panel.
As a kind of embodiment of switching tube, the switching tube is the FET Q1, the FET Q1 of N-channel
Grid be connected to diode D2 anode, one end of diode D1 anode and relay KA coil with FET Q1
Drain electrode connection, FET Q1 source ground.Certainly, switching tube can also use the FET of P-channel.
As the another embodiment of switching tube, the switching tube is NPN triode, the base stage of the NPN triode
It is connected to diode D2 anode, the current collection of one end of diode D1 anode and relay KA coil with NPN triode
Pole is connected, the grounded emitter of NPN triode.Certainly, switching tube can also use PNP triode.
Compared with prior art, the beneficial effects of the present invention are：Detect that current are believed in outer water tube by infrared detector
Number, and by the working condition of the outside heat-generating pipe of water-flow signal control, prevent heat-generating pipe from occurring the danger of dry combustion method, improve i.e. hot
The security performance of formula heating system and life-span.
Brief description of the drawings
Fig. 1 is the structural representation one of the Instant heating type heating system of the present invention；
Fig. 2 is the structural representation two of the Instant heating type heating system of the present invention；
Fig. 3 is the circuit diagram of the anti-dry burning device of the present invention.
In figure：01st, water inlet；02nd, water pump；03rd, heat-generating pipe；04th, delivery port；05th, circuit control module；11st, receiver；
12nd, transmitter.
Embodiment
Below, with reference to accompanying drawing and embodiment, the present invention is described further：
Instant heating type heating system, including water route module and circuit control module 05, as shown in Fig. 1 to 2, water route module includes
Water inlet 01, water pump 02, heat-generating pipe 03 and delivery port 04；Circuit control module 05 includes control module, data acquisition module, prevented
Dry burning device, control panel and power supply.Water inlet 01, heat-generating pipe 03 and delivery port 04 are sequentially connected, and water pump 02 is used to control water
Stream enters from water inlet 01, is flowed out by heat-generating pipe 03 from delivery port 04；Water (flow) direction is as shown in being pointed to the arrow in Fig. 1.
Data acquisition module is used to gather inflow temperature, leaving water temperature and the water outlet capacity signal in the module of water route, and
Voltage signal for gathering power supply, and collection signal is sent to control module；Collection signal includes voltage signal, enters water temperature
Degree, leaving water temperature and water outlet capacity signal.
Specifically, the process of data collecting module collected water capacity signal can be but not limited to：Detect delivery port 04
Water velocity (such as water flow sensing unit), and calculated according to the area of section of delivery port 04.
Anti-dry burning device is used to gather the water-flow signal in water inlet 01, and water-flow signal is sent to control module.
Control panel is used for the control signal that inputs user and sent to control module, control signal include leaving water temperature,
Water outlet capacity signal and switch controlling signal etc..
Control module is used for the working condition that water pump 02 and/or heat-generating pipe 03 are controlled according to control signal；It is additionally operable to basis
Water-flow signal controls the working condition of heat-generating pipe 03；And according to the work of collection signal control water pump 02 and/or heat-generating pipe 03
State.
Wherein, heat-generating pipe 03 is stainless steel thick film heating pipe 03, and the inflow temperature of water inlet 01 is usually 5 DEG C~45 DEG C,
Current are heated rapidly in heat-generating pipe 03, when current reach delivery port 04, and the leaving water temperature in delivery port 04 is 95 DEG C；It is whole
Individual process is continuous work, continually produces boiling water.
Power supply is powered for whole system.Power supply provides the direct current DC power that AC AC powers and controller need.With
Family is by selecting the function of control panel, than if desired for drinking water (standard of national regulation drinking water is more than 92 DEG C),
User only needs to the capacity for the temperature, the then water outlet of reselection needs for selecting to need on the temperature select button of control panel
(such as 200ML), then the button of the work water outlet of control panel is double-clicked, control module is received after the control signal of user, horse
The working condition of upper collection voltage signal, inflow temperature, control heat-generating pipe 03 and water pump 02；Specifically, heat-generating pipe 03 is powered excellent
First, until leaving water temperature is more than after 92 DEG C, water pump 02 just starts to run well, and delivery port 04 flows out boiling water in a steady stream.Shortly
In the course of work of hot type boiler, MUC gather in real time correlation collection signal, rationally control heat-generating pipe 03 operation power and
The flow of water pump 02.Ensure that leaving water temperature and capacity reach the desired value of user's selection.
Using stainless steel thick film heating pipe 03 as heat exchange element, electric conversion efficiency is more than 98%；Heat transfer rate is fast, from
25 DEG C to 95 DEG C of boiling water, it is only necessary to 3 second time；Power attenuation is low, because what is be made using rare earth alloys such as palladium-silvers by high temperature
Stainless steel thick film heating pipe 03, the decay of its power is almost nil；In terms of life of product, normally use more than 10000 hours
Life-span.Comprehensive evaluating has the advantages that efficiency high, firing rate are fast, power attenuation is low, service life is long.
As shown in figure 3, control module is MCU, power supply includes the first power supply and AC power；First power supply is direct current
Source；
Anti-dry burning device includes infrared detector TR, adjustable resistance R1, resistance R2, resistance R3, resistance R4, resistance R5, electricity
Hinder R6, resistance R7, amplifier OA, (it mainly realizes switching function to the FET Q1 of N-channel, naturally it is also possible to triode, for example
Its function also can be achieved in NPN triode, or other switching tubes such as controllable silicon), relay KA, diode D1, diode D2.
Infrared detector TR includes receiver 11, and the transmitter 12 matched with receiver 11.
One end of transmitter 12 is connected by resistance R2 and the first power supply, and one end of receiver 11 and amplifier OA's is positive defeated
Enter end to connect by resistance R3 and the first power supply, adjustable resistance R1 adjustable end and amplifier OA inverting input connection, fortune
The negative electrode for putting OA output end, resistance R4 one end and diode D2 is connected with MCU input, MCU output end and electricity
Hinder R5 one end connection, the grid of one end of the resistance R5 other end, diode D2 anode and resistance R6 with FET Q1
Pole (or base stage of NPN triode) is connected, and one end of diode D1 anode and relay KA coil is and FET
Q1 drain electrode (or colelctor electrode of NPN triode) connection, relay KA tip side is connected by resistance R7 with AC power.
The resistance R4 other end, MCU power end, the power end of amplifier, adjustable resistance R1 one end, diode D1 the moon
The other end of pole and relay KA coil and the connection of the first power supply；The other end, the other end of receiver 11, the electricity of transmitter 12
Hinder the R6 other end, FET Q1 source electrode (or emitter stage of NPN triode), MCU ground terminal, adjustable resistance R1 it is another
One end and amplifier OA ground terminal are grounded.
Heat-generating pipe 03 is connected by relay KA tip side and AC power.
By water to ultrared principle of absorption, water can absorb infrared ray, because hydrone can vibrate and rotate,
Vibration and to rotate in general energy ratio relatively low, thus the energy absorbed during energy level transition is also than relatively low, i.e., low-frequency light, this
Component frequency is located just at infrared light district, and the IR wavelength section that this current anti-dry burning device is used is in 750NM~1500NM frequencies
Section.
The operation principle of anti-dry burning device is：Current in water inlet 01 are set by adjustable resistance R1 adjustable end just
The predetermined resistance value of normal and exsiccosis.Infrared detector TR transmitting terminal sends infrared signal to water inlet 01, water inlet
Current in 01 absorb part infrared signal, and send feedback infrared signal to infrared detector TR receiving terminal, and will feedback
Infrared signal is sent to amplifier OA positive input.Water-flow signal and predetermined resistance value are after amplifier OA comparison, output
Level signal；If the current in water inlet 01 are normal, level signal is high level, diode D2 cut-offs, FET Q1
(or triode) is turned on, relay KA coil magnetization, the relay KA closing of contact；If the current in water inlet 01 are
Exsiccosis, then level signal is low level, and now the voltage of A points is less than the voltage of B points, diode D2 conductings, the voltage of B points
Decline immediately, i.e., FET Q1 grid (or base stage of NPN triode) threshold voltage is reduced, and then causes FET
Q1 (or triode) ends, relay KA coil loss of excitation, and relay KA contact disconnects, thus AC power you can not be
Heat-generating pipe 03 is powered, and heat-generating pipe 03 is stopped.
When MCU collects the low level of amplifier OA outputs, MCU output low levels so that resistance R5 and resistance R6 dead electricity,
Then causing FET Q1 grid (or base stage of NPN triode) threshold voltage reduces, FET Q1 (or three poles
Pipe) cut-off, relay KA coil loss of excitation, relay KA contact disconnects, thus AC power you can not be supplied for heat-generating pipe 03
Electricity, heat-generating pipe 03 is stopped.MCU program enters alarm mode simultaneously, sends alarm signal to control panel, reminds user
Water shortage failure is had occurred and that, it is necessary to which alarm can just be eliminated by powering off；And MCU enters lock-out state, whole control system can not
Operation.
The advantage of the invention is that being realized by anti-dry burning device and control module can accomplish once sending out in time
When existing water shortage failure, relay hardware circuit can be just disconnected in 10MS, MCU realizes power-off, alarm, lock machine in 100MS
Etc. chain operation；Protect the dry combustion method of heat-generating pipe 03 dangerous well, greatly improve immediate heating type water dispenser (water heater)
Usage safety performance and life-span.
The pipeline of water inlet 01 is transparent pipeline, so that infrared signal can be absorbed by current.It should be noted that infrared
Detector TR not only can also detect that water inlet 01 is arrived between heat-generating pipe 03 for the water-flow signal in detection water inlet 01
Water pipe between water-flow signal, the water pipe also be transparent pipeline.
In anti-dry technical elements, using new touchless infrared rays survey current technology, fast response time, base
Instinct accomplishes the very fast time of relay machinery power-off, can accomplish to complete within 10MS.
It will be apparent to those skilled in the art that technical scheme that can be as described above and design, make other various
It is corresponding to change and deformation, and all these change and deformation should all belong to the protection domain of the claims in the present invention
Within.
Claims (5)
1. a kind of anti-dry burning device, it is characterised in that including infrared detector TR, adjustable resistance R1, resistance R2, resistance R3, electricity
Hinder R4, resistance R7, amplifier OA, switching tube, relay KA, diode D1 and diode D2；Infrared detector TR includes receiver,
And the transmitter matched with receiver；
One end of transmitter is connected by resistance R2 and the first power supply, and one end of receiver and amplifier OA positive input lead to
Resistance R3 and the connection of the first power supply, adjustable resistance R1 adjustable end and amplifier OA inverting input connection are crossed, amplifier OA's is defeated
Go out negative electrode of end and resistance the R4 one end with diode D2 to be connected, diode D2 anode and the control end of switching tube are connected,
One end of diode D1 anode and relay KA coil is connected with the input of switching tube, and relay KA tip side leads to
Resistance R7 is crossed to be connected with AC power；
The resistance R4 other end, the power end of amplifier, adjustable resistance R1 one end, diode D1 negative electrode and relay KA line
The other end of circle and the connection of the first power supply；The other end of transmitter, the other end of receiver, the output end of switching tube, MCU ground
The ground terminal at end, the adjustable resistance R1 other end and amplifier OA is grounded；Outside heat-generating pipe by relay KA tip side and
AC power is connected.
2. anti-dry burning device as claimed in claim 1, it is characterised in that also including MCU, resistance R5 and resistance R6；
The negative electrode of amplifier OA output end, resistance R4 one end and diode D2 is connected with MCU input, MCU output
End and resistance R5 one end are connected, one end of the resistance R5 other end, diode D2 anode and resistance R6 with switching tube
Control end；MCU power end and the connection of the first power supply, resistance R6 other end ground connection.
3. anti-dry burning device as claimed in claim 2, it is characterised in that MCU is additionally operable to the level sent according to amplifier OA
Signal, sends alarm signal to outside control panel.
4. the anti-dry burning device as described in claim any one of 1-3, it is characterised in that the switching tube is imitated for the field of N-channel
Should pipe Q1, FET Q1 grid be connected to diode D2 anode, diode D1 anode and relay KA line
Drain electrode of the one end of circle with FET Q1 is connected, FET Q1 source ground.
5. the anti-dry burning device as described in claim any one of 1-3, it is characterised in that the switching tube is NPN triode, institute
The base stage for stating NPN triode is connected to diode D2 anode, and one end of diode D1 anode and relay KA coil is equal
It is connected with the colelctor electrode of NPN triode, the grounded emitter of NPN triode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710120982.1A CN107062619A (en) | 2017-03-02 | 2017-03-02 | A kind of anti-dry burning device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710120982.1A CN107062619A (en) | 2017-03-02 | 2017-03-02 | A kind of anti-dry burning device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107062619A true CN107062619A (en) | 2017-08-18 |
Family
ID=59622849
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710120982.1A Pending CN107062619A (en) | 2017-03-02 | 2017-03-02 | A kind of anti-dry burning device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107062619A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111174240A (en) * | 2019-12-20 | 2020-05-19 | 长虹美菱股份有限公司 | Dry burning prevention system for gas stove |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH686200A5 (en) * | 1992-10-02 | 1996-01-31 | Vaillant Gmbh | Water heater. |
| CN2804711Y (en) * | 2005-05-08 | 2006-08-09 | 冷同桂 | Electrical heating water heater |
| CN101251750A (en) * | 2008-03-20 | 2008-08-27 | 谭启仁 | Electrothermic boiled water pot intelligent control circuit with multiple collecting functions |
| CN201591469U (en) * | 2009-12-04 | 2010-09-29 | 许庭祯 | Automatic dry-heating prevention water replenishing device for coffee machine |
| CN203164790U (en) * | 2013-03-27 | 2013-08-28 | 昆明理工大学 | Water dispenser intelligent heating control system |
| CN103727308A (en) * | 2013-11-25 | 2014-04-16 | 青岛盛嘉信息科技有限公司 | Digital control electric water heater |
| CN203564097U (en) * | 2013-11-08 | 2014-04-30 | 上海电机学院 | Novel water dispenser |
| CN204363767U (en) * | 2014-12-31 | 2015-06-03 | 华北电力大学（保定） | Be applied to the anti-dry burning device of instant heating type drinking machine |
| CN206556267U (en) * | 2017-03-02 | 2017-10-13 | 佛山利物浦电子科技有限公司 | A kind of anti-dry burning device |
-
2017
- 2017-03-02 CN CN201710120982.1A patent/CN107062619A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH686200A5 (en) * | 1992-10-02 | 1996-01-31 | Vaillant Gmbh | Water heater. |
| CN2804711Y (en) * | 2005-05-08 | 2006-08-09 | 冷同桂 | Electrical heating water heater |
| CN101251750A (en) * | 2008-03-20 | 2008-08-27 | 谭启仁 | Electrothermic boiled water pot intelligent control circuit with multiple collecting functions |
| CN201591469U (en) * | 2009-12-04 | 2010-09-29 | 许庭祯 | Automatic dry-heating prevention water replenishing device for coffee machine |
| CN203164790U (en) * | 2013-03-27 | 2013-08-28 | 昆明理工大学 | Water dispenser intelligent heating control system |
| CN203564097U (en) * | 2013-11-08 | 2014-04-30 | 上海电机学院 | Novel water dispenser |
| CN103727308A (en) * | 2013-11-25 | 2014-04-16 | 青岛盛嘉信息科技有限公司 | Digital control electric water heater |
| CN204363767U (en) * | 2014-12-31 | 2015-06-03 | 华北电力大学（保定） | Be applied to the anti-dry burning device of instant heating type drinking machine |
| CN206556267U (en) * | 2017-03-02 | 2017-10-13 | 佛山利物浦电子科技有限公司 | A kind of anti-dry burning device |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111174240A (en) * | 2019-12-20 | 2020-05-19 | 长虹美菱股份有限公司 | Dry burning prevention system for gas stove |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1182756C (en) | Fluid heater with improved heating elements controller | |
| CN202303559U (en) | Range hood with automatic cleaning function | |
| CN106587406A (en) | Hot and cold water dispensing purifier and control method thereof | |
| CN104197502A (en) | Heat source machine formed by connecting gas water heaters in parallel and control method | |
| CN109855284B (en) | Household gas water heater and control method thereof | |
| CN102278525A (en) | Intelligent instant-heating faucet | |
| CN105222356A (en) | There is the electric shock preventive water heater of temperature memory function | |
| CN206556267U (en) | A kind of anti-dry burning device | |
| CN107062619A (en) | A kind of anti-dry burning device | |
| CN105318556B (en) | A kind of energy-saving and water-saving system and its control method | |
| KR100684373B1 (en) | Control device of providing warm water with a instantaneous hitting method | |
| CN206556231U (en) | Instant heating type heating system | |
| CN206453688U (en) | Rapid water heating device | |
| CN204693778U (en) | Water heater | |
| CN204923476U (en) | Prevent touching electric water heater with temperature memory function | |
| CN105526625A (en) | Small domestic safe intelligent environment-friendly heating system | |
| CN110398053A (en) | Intelligent gas water heater with alarm function and alarm control method thereof | |
| CN202660755U (en) | Gas water heater | |
| CN214331674U (en) | Structure of instant heating type water purification faucet | |
| CN211372775U (en) | External hot water circulation control system for water heater | |
| CN105222355A (en) | A kind of backwater control system of air-source water heater | |
| KR200382678Y1 (en) | Control device of providing warm water with a hybrid instantaneous heating method | |
| CN201055305Y (en) | Electricity-saving drinking machine with electronic time recorder | |
| CN102519071A (en) | Intelligent control heating system combining solar energy, air source and gas | |
| CN105135511A (en) | Solar-heating-plate-based heating 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 | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20190904 Address after: 528400 Rainbow Avenue, West District, Zhongshan City, Guangdong Province, Phase I, 7-storey A710 and A711 Applicant after: Zhongshan Luozhong Electronic Technology Co.,Ltd. Address before: 528300 North Third Lane No. 7, Leliu Street, Shunde District, Foshan City, Guangdong Province Applicant before: FOSHAN LIWUPU ELECTRONIC TECHNOLOGY CO.,LTD. |
|
| TA01 | Transfer of patent application right | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170818 |
|
| RJ01 | Rejection of invention patent application after publication |