CN1184917A - Non-complete combustion prevention device for gas water heater - Google Patents
Non-complete combustion prevention device for gas water heater Download PDFInfo
- Publication number
- CN1184917A CN1184917A CN97112003A CN97112003A CN1184917A CN 1184917 A CN1184917 A CN 1184917A CN 97112003 A CN97112003 A CN 97112003A CN 97112003 A CN97112003 A CN 97112003A CN 1184917 A CN1184917 A CN 1184917A
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- China
- Prior art keywords
- flame
- gas
- burner
- combustion
- heat exchanger
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- 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.)
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N5/00—Systems for controlling combustion
- F23N5/02—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium
- F23N5/12—Systems for controlling combustion using devices responsive to thermal changes or to thermal expansion of a medium using ionisation-sensitive elements, i.e. flame rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23D—BURNERS
- F23D14/00—Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
- F23D14/46—Details, e.g. noise reduction means
- F23D14/72—Safety devices, e.g. operative in case of failure of gas supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23N—REGULATING OR CONTROLLING COMBUSTION
- F23N1/00—Regulating fuel supply
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F23—COMBUSTION APPARATUS; COMBUSTION PROCESSES
- F23C—METHODS OR APPARATUS FOR COMBUSTION USING FLUID FUEL OR SOLID FUEL SUSPENDED IN A CARRIER GAS OR AIR
- F23C5/00—Disposition of burners with respect to the combustion chamber or to one another; Mounting of burners in combustion apparatus
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
- Control Of Combustion (AREA)
Abstract
This invention provides an incomplete combustion prevention apparatus for gas hot water heater. A burner controller (30) applies voltage to a flame rod (38) located in a flame produced across a flame hole (22) of a burner (20) in a normal combustion state at an upper portion of the flame hole (22), and if a detected flame current has a predetermined judgement value or lower, the controller closes a gas solenoid valve (26) for supplying fuel gas to the burner. There is provided on an inner trunk skirt (10) a return flow pipe (13) having a return pipe part (13b) an upper end of which return pipe part is opened to a combustion chamber on the lower side of the heat exchange, and which return pipe part includes the flame rod (38) at a lower part thereof and opened to the flame hole (22). When clogging is produced in the heat exchanger, combustion waste gas at an upper portion in the combustion chamber passes through the return flow pipe (13), and is returned to the neighborhood of the flame hole (22).
Description
The present invention relates to use the imperfect combustion device that prevents of heat exchanger gas heater that the burner heating is provided with above interior sheath skirt.
The imperfect combustion device that prevents as existing such gas heater, for example disclosed as opening clear 61-18358 communique in fact, just in the flame under the normal combustion state thermocouple is set in burner fire hungry ghosts who spit fire top position, if when the output voltage of this thermocouple was lower than the threshold values of regulation, the gas electromagnetic valve of supplied burner combustion gas will be closed.Be provided with opening at interior sheath skirt top (heat exchanger downside) in addition, make the secondary thermocouple over against opening part, its polarity is opposite with described thermocouple.Will be in the imperfect combustion state when gas heater is installed in indoor and use causes indoor oxygen concentration to reduce continuously under the insufficient state of ventilation, meanwhile the flame of burner raises, and the length of flame root unburned gas section strengthens.Therefore, in described imperfect combustion device, thermocouple is in unburned gas section, and output voltage reduces, and closes gas electromagnetic valve, stops to supply with combustion gas to burner, prevents the imperfect combustion that anoxic causes.
Also have, the heat exchanger of sheath skirt top etc. stops up, during the combustion air quantity not sufficient, even the interior oxygen concentration of installation environment is normal, also imperfect combustion can take place when being arranged in.Because the flame of burner does not raise, only use the thermocouple (one-level thermocouple) in the described flame just can not prevent the imperfect combustion that this reason causes in this case.Be head it off, as described except that above the burner fire hungry ghosts who spit fire, being provided with the one-level thermocouple, the opening part of interior sheath skirt upper portion side wall from arranged outside over against the secondary thermocouple, these two thermocouple polarity are together in series on the contrary, when synthetic output voltage was lower than given threshold values, the gas electromagnetic valve of supplied burner combustion gas will be closed.
In this technology, the opening from interior sheath skirt upper portion side wall under situation about not stopping up such as heat exchanger has the combustion gas outflow hardly, therefore almost nil over against its output voltage of thermocouple, the voltage output of the thermocouple of burner fire hungry ghosts who spit fire top setting is in fact only arranged this moment, so identical with aforementioned effect when indoor oxygen concentration reduces, prevent imperfect combustion.Under the situation that heat exchanger etc. take place to stop up, because the pressure of interior sheath skirt internal upper part rises, therefore opening has combustion gas to flow out, thermocouple over against opening is heated, its output voltage increases, the synthetic corresponding minimizing of output voltage stops to supply with combustion gas to burner when being lower than threshold values, thereby also can prevent the imperfect combustion that causes because of obstructions such as heat exchangers.
Though prior art can satisfy function roughly,, heating and cooling there are hysteresis, thereby have the problem of response lag because of thermocouple has to a certain degree thermal capacity.Especially the thermocouple that is provided with of burner fire hungry ghosts who spit fire top, whether burner catches fire when also being used for detecting water heater usually and starting working, because of detect missing of ignition time lag with thermocouple, exist the problem that unburned gas is emitted overlong time when missing of ignition with several seconds (for example 10 seconds).In order to address this problem, whether the detection burner catches fire and also can be carried out the detection of flame current by the flame probe of establishing in addition outside the thermocouple, owing to use thermocouple and flame probe simultaneously, the high problem of cost occurs.In addition, in the described prior art, though can consider to replace the thermocouple that above the burner fire hungry ghosts who spit fire, is provided with the flame probe, but can not replace at the thermocouple of interior sheath skirt upper portion side wall with the flame probe in fact over against opening part, though can prevent from the imperfect combustion that causes because of indoor oxygen concentration deficiency from can not prevent the imperfect combustion that causes because of obstructions such as heat exchangers because replace thermocouple with the flame probe.
Purpose of the present invention will solve each above-mentioned problem just.
The imperfect combustion device that prevents of gas heater of the present invention is a kind of interior sheath skirt that comprises, heat exchanger that interior sheath skirt top is provided with continuously and the burner that is arranged on interior sheath skirt below, by the gas heater of burner heating through over-heat-exchanger water supply, it is characterized in that having the flame probe of the flame that produces with flame hole under the top normal combustion state that is positioned at the burner fire hungry ghosts who spit fire, give this flame probe making alive to detect flame current by the flame probe, when this flame current is lower than given threshold values, will close combustion controller from the gas electromagnetic valve of combustion gas to described burner that supply with, and offer import in the interior sheath skirt of upper end below heat exchanger, and the bottom is provided with over against the circulating pipe of the burnt gas return duct of the flame hole place opening of placing the flame probe.
Feature of the present invention is the preventing in the imperfect combustion device of described gas heater, gas heater is installed indoor when waiting environmental oxygen concentration deficiency to cause imperfect combustion the flame of burner raise, the length of the unburned gas section of flame root increases.Therefore the flame probe makes an immediate response as being in unburned gas section, and flame current reduces, and when flame current was lower than given threshold values, combustion controller will cut out gas electromagnetic valve, stops to supply with combustion gas to burner.In addition, when generations such as heat exchanger were stopped up, because the pressure on interior sheath skirt top rises, that part of burnt gas was back to the flame hole that is provided with the flame probe by the circulating pipe upper end by circulating pipe trunk line and return duct.Thereby near the oxygen concentration the flame hole is reduced, and that part of flame is raise, with aforementioned the same can making an immediate response, reduce flame current, combustion controller will cut out gas electromagnetic valve when flame current is lower than the threshold values of regulation, stops to supply with combustion gas to burner.When gas heater is started working, under the non-ignitable situation of burner, do not flow through because of the flame probe has flame current for a certain reason, combustion controller will cut out gas electromagnetic valve immediately, stops to supply with combustion gas to burner.
Feature of the present invention is the preventing in the imperfect combustion device of described gas heater, and circulating pipe is preferably by extending vertically downward from the upper end, the lower end in the outside of interior sheath skirt by the trunk line of opening and from then on the return duct of the intermediate section expenditure of trunk line constitute.In burner when igniting,, the pressure moment in the interior sheath skirt increases, and the burnt gas flow that returns from circulating pipe also increases, but like this, the burnt gas major part of backflow is emitted from the trunk line lower end of circulating pipe, and the burnt gas amount that is back to flame hole from return duct seldom.Thereby when igniting, burnt gas returns flame hole, and that flame is raise is limited, and the inspection side of catching fire can be reliable.
Below accompanying drawing is done simple declaration
Fig. 1 is the overall structure figure that prevents a kind of embodiment of imperfect combustion device of expression gas heater of the present invention.
Fig. 2 is the attached view of 2-2 section enlarged in the presentation graphs 1.
Fig. 3 is the combustion controller structure chart of expression embodiment shown in Figure 1.
Fig. 4 is the oxygen concentration of expression embodiment shown in Figure 1 and the graph of a relation of flame current and imperfect combustion degree.
Fig. 5 schemes over time for the expression embodiment shown in Figure 1 beginning back flame current of working under the different situation of occlusion rate.Following is-symbol explanation
10 ... interior sheath skirt 12 ... heat exchanger
13 ... circulating pipe 13a ... the circulating pipe trunk line
13b ... return duct 20 ... burner (main burner)
22 ... flame hole 26 ... gas electromagnetic valve
30 ... combustion controller 38 ... the flame probe
16 ... hot-water line 17 ... the hot water tap
12b ... fin 12a ... heat-transfer pipe
14 ... combustion chamber 11 ... economizer bank
18 ... water flow controller 18a ... guide rod
28 ... hydraulic pressure responsive valves 25 ... air supply pipe
26a ... actuating coil 27 ... the capacity adjustment valve
15 ... feed pipe 22a ... dividing plate
Below, with reference to accompanying drawing, the embodiment that is suitable for gas heater of the present invention is described.
As shown in Figure 1, the heat exchanger 12 that is made of heat-transfer pipe 12a and fin 12b is set above the interior sheath skirt 10 that forms gas heater combustion chamber 14, the below is provided with main burner 20.The entrance side of heat-transfer pipe 12a is connected with feed pipe 15 by the economizer bank 11 in sheath skirt 10 outsides in being wrapped in, and exports with heat-transfer pipe hot water tap 17 is installed on the hot-water line 16 that is connected.The water flow controller 18 that will moving leader 18a makes the use traffic orifice plate of aftermentioned hydraulic pressure responsive valves 28 and water flow switch 31 actions is installed on the feed pipe 15 when confluent surpasses ormal weight.Water flow controller 18 is provided with the adjusting hot water temperature's of manual adjustments 12 flows from feed pipe 15 to heat exchanger hand-operated valve, and diagram has been done omission.
As shown in Figure 1, main burner 20 is to be connected and constituted by three burner unit 21, supplies with burning gases by the air supply pipe 25 that is connected in series by gas electromagnetic valve 26, capacity adjustment valve 27 and hydraulic pressure responsive valves 28.Gas electromagnetic valve 26 is subjected to the electric current that flows to actuating coil 26a of combustion controller 30 outputs to control switching, and ability is adjusted valve 27 is changed water heater by the gas quantity of manual adjustments supply main burner 20 heat supply outlet capacity.Hydraulic pressure responsive valves 28 is by the guide rod 18a control switching of aforementioned water flow controller 18, is in open mode when confluent surpasses heat exchanger 12 ormal weights.When hydraulic pressure responsive valves 28 was opened, the cam 18b that is arranged on the guide rod 18a will make water flow switch 31 open.
Each burner unit 21 usefulness metallic plate is made, and as shown in Figures 1 and 2, each burner assembly all has a plurality of flame holes 22 of lining up two row, and each flame hole 22 is separated by dividing plate 22a.The hole that is provided with by sheath skirt 10 sidewalls in heat exchanger 12 downsides, the trunk line 13a of the circulating pipe 13 of 14 upper end opening extends downwards along the sidewall outside of interior sheath skirt 10 always in the combustion chamber, its lower end is at the atmosphere split shed of gas heater, the otch of sheath skirt 10 bottoms in the burnt gas return duct 13b that branches out from the centre passes leads to the flame hole 22 that forms the flame that is inserted into flame probe 38.The point of this flame probe 38 supports with insulator 38a, is arranged to just in time to enter the height in the flame that flame hole 22 produces under the normal combustion state.
The summary of combustion controller 30 is described by Fig. 3 below.Power supply 40 is dry cells among this embodiment, and by described water flow switch 31, voltage monitoring circuit 32, driving circuit for electromagnetic valve 33, firing circuit 34, timing circuit 35, constant-voltage circuit 36, flame holding circuit 37 and safety circuit 39 are connected.Driving circuit for electromagnetic valve 33 is to accept the input of timing circuit 35; to actuating coil 26a input current described later; open gas electromagnetic valve 26; make firing circuit 34 actions; by ignition plug 34a ignition combustion device 20; when the flame current detected value from 37 inputs of flame holding circuit is lower than the threshold values of regulation, closes the electric current of actuating coil 26a and close gas electromagnetic valve 26.Have the gas electromagnetic valve 26 for the open and close absorption coil 26b that flows through of electric current and in case be held open the hold-in winding 26c of the needed less electric current of state after opening greatly among the actuating coil 26a.
The following describes the action of described embodiment.Open hot water tap 17, when the water yield by feed pipe 15 surpassed specified rate, water flow switch 31 was opened when hydraulic pressure responsive valves 28 was opened, and combustion controller 30 is started working.At first driving circuit for electromagnetic valve 33 actions, big electric current input absorption coil 26b, open the gas electromagnetic valve 26 of closing, after preset time (for example 2 seconds), stop this electric current and import little electric current to hold-in winding 26c, make gas electromagnetic valve 26 keep opening, supply with combustion gas to main burner 20.When water flow switch 31 is opened; firing circuit 34 actions; near the flame hole 22 ignition plug 34a (omitting among the figure) that are located at burner 20 produce spark; make from the gas ignition of main burner 20 ejections; after flame holding circuit 37 detected flame current by flame probe 38 in short time behind the flameholding, firing circuit 34 quit work.When if detected flame current is lower than given threshold values, judge owing to light a fire mistake or certain reason make fired state bad, close the electric current of hold-in winding 26c, close gas electromagnetic valve 26, stop to supply with combustion gas, gas heater is quit work to main burner 20.
When main burner 20 normally catches fire, cause is passed through the flame current of flame probe 38 greater than given threshold values, and gas electromagnetic valve 26 is opened always, the gas heater continuous firing, water supply by heat exchanger 12 is heated by main burner 20, flows out hot water from hot water tap 17.If close hot water tap 17, when hydraulic pressure responsive valves 28 was closed, water flow switch 31 was also closed, and gas heater quits work.Under the duty, oxygen concentration reduction in the air in the environment of installation gas heater, or supply the combustion air path to stop up, during the combustion air quantity not sufficient, imperfect combustion will take place.The following describes the effect under the various situations.
The path that combustion air at first is described does not stop up, but prevents unburnt effect when oxygen concentration is low in the air.When gas heater be installed in indoor, fully do not take a breath and when using continuously, indoor oxygen concentration reduces gradually, imperfect combustion takes place.With Fig. 4 this situation is described, represents the CO/CO of imperfect combustion degree when oxygen concentration reduces
2Ratio increases sharply.Minimizing along with oxygen concentration, the flame that the flame hole 22 of main burner 20 generates raises, the unburned gas segment length that the flame root generates increases gradually, therefore under the normal combustion state, the most advanced and sophisticated head of the flame probe 38 in burned flame moves in the unburned combustion gas section gradually, so flame current reduces as symbol I represents among Fig. 4 gradually.Flame holding circuit 37 detects this flame current I by flame probe 38; when its numerical value is lower than given threshold values I0 (A point); driving circuit for electromagnetic valve 33 is closed the electric current of input hold-in winding 26c; close gas electromagnetic valve 26, stop to supply with the combustion gas of main burner 20 and gas heater is quit work.This threshold values I0 for example is defined as 1 μ A, CO/CO at this moment
2Ratio for example is 0.035.When oxygen concentration reduces in the air, prevent the imperfect combustion work that comes to this.And in fact can not produce circulation in this case by the burnt gas of circulating pipe 13.
It is normal to the following describes in the air oxygen concentration, but the fin 12b of the heat exchanger 12 of sheath skirt 10 tops stops up because of combustion products etc. in being arranged on, sluggish in air circulation, prevents unburnt effect during the combustion air quantity not sufficient.This obstruction rises the pressure by interior sheath skirt 10, heat exchanger 12 and 20 combustion chamber that forms 14 internal upper parts of main burner with the conference that adds of degree gradually, the existing procucts of circulating pipe 13 are not installed, obstructions such as heat exchanger 12 cause imperfect combustion, and the flame that flame hole 22 takes place can raise hardly.And be equipped with among the described embodiment of circulating pipe 13, heat exchanger 12 increases because of chocking-up degrees such as combustion products, along with the upper pressure in the combustion chamber 14 rises, shown in the solid line arrow, the burnt gas that turns back near combustion chamber 14 internal upper parts the flame hole 22 that is provided with flame probe 38 from the trunk line 13a of circulating pipe 13 by return duct 13b increases gradually, thereby near the oxygen concentration of the combustion air the flame hole 22 is reduced, the flame of flame hole 22 raises gradually, and the length of flame root unburned gas section increases gradually.Therefore the same with situation noted earlier, the termination portion that is arranged in the flame probe 38 of the flame that is burning under the normal combustion state is moved to unburned gas section gradually, thereby flame current reduces gradually.Flame holding circuit 37 detects the flame current by flame probe 38, and when its numerical value was lower than given threshold values 10, driving circuit for electromagnetic valve 33 was closed the electric current of hold-in winding 26c, stops to supply with combustion gas to main burner 20, and gas heater quits work.Among this embodiment, its threshold values also is 1 μ A, can suitably select the occlusion rate of the area of passage of heat exchanger 12 to stop the work of gas heater by the geomery, the particularly geomery of return duct 13b of adjusting circulating pipe 13.Coming to this when heat exchanger 12 takes place to stop up, it is unburnt to realize preventing.
Fig. 5 be the occlusion rate that is illustrated in heat exchanger 12 in the gas heater of described embodiment when having nothing in common with each other work beginning back flame current scheme over time, thereby further specify effect when heat exchanger 12 takes place to stop up.When the occlusion rate of heat exchanger 12 was 0% (promptly not stopping up), flame current catches fire in the combustion gas of when beginning work, and the back is anxious earlier to be increased, and once plunges then, increased once more or converged to a certain numerical value.The back flame current that catches fire once plunging be since burner 20 when catching fire in pressure moment in the sheath skirt 10 increase, the burnt gas flow that returns from circulating pipe 13 increases, the event of flame moment rising, among this embodiment, the burnt gas major part of returning is emitted by the lower end outlet of the trunk line 13a of circulating pipe 13, the burnt gas that turns back to flame hole 22 from return duct 13b seldom, thereby flame current reduces few.If but the lower end bending of circulating pipe 13 is formed return duct 13b, burnt gas just all turns back to flame hole 22 so, and it is quite big that the sloping portion of flame current also just becomes.
Work beginning back flame current over time as shown in Figure 5, occlusion rate increase along with heat exchanger 12, initial change is little, but when increasing to a certain degree, occlusion rate just reduces gradually, as previously mentioned, along with occlusion rate increases, turn back near the flame hole 22 burnt gas amounts that are provided with flame probe 38 by return duct 13b and increase the event of flame rising.In the example of Fig. 5, occlusion rate reaches at about 35% o'clock, I0 when reaching threshold values because of the flame current sloping portion, and occlusion rate is during greater than this numerical value, and driving circuit for electromagnetic valve 33 is closed gas electromagnetic valve 26, and gas heater is quit work.
Among the described embodiment, be that trunk line 13a with circulating pipe 13 extends and vertically downward at lower ending opening, there is return duct 13b in branch in the middle of it, so as previously mentioned, because of the sloping portion minimizing of the flame current after the igniting, the igniting of carrying out after the igniting detects and can stablize.But the bottom that present invention can also be implemented as bending circulating pipe 13 forms return duct 13b, burnt gas all is back to flame hole 22.At this moment, flame current sloping portion after the igniting increases, carry out but igniting detects can be before flame current descends (for example firing circuit work begin back 2 seconds), be preferably in after the certain hour (for example 1 minute after) and carry out and detect imperfect combustion with flame current.
Described embodiment is to be that the example explanation is of the present invention with the gas heater that ignition plug is directly lighted the main burner mode.The present invention also is applicable to the gas heater of lighting the main burner mode with pilot burner, at this moment if the flame probe is installed on the pilot burner and with the return duct 13b of circulating pipe 13 facing to pilot burner.And the present invention embodiment as described is not only applicable to auxiliary valve formula gas heater like that, and applicable to main valve formula gas heater.
As mentioned above, adopt when of the present invention, it no matter is indoor imperfect combustion when waiting environmental oxygen concentration not enough, or the imperfect combustion that takes place when heat exchanger etc. stop up, can both make an immediate response and reduce flame current, when flame current is lower than given threshold values, stop to supply with combustion gas to main burner, so can prevent the imperfect combustion of gas heater in good time, and under the situation that burner does not catch fire, also can make an immediate response and stop to supply with combustion gas, thereby can shorten emitting the time of combustion gas when not catching fire to burner.
In addition, because the trunk line of circulating pipe extends vertically downward and at lower ending opening, branch out return duct in the middle, moment because of interior sheath skirt internal pressure when burner catches fire increases, burnt gas returns flame hole makes the distance of rising of flame very little, thereby available flame probe stably detects and whether catches fire.
Claims (2)
1. the imperfect combustion device that prevents of a gas heater comprises interior sheath skirt, the heat exchanger that interior sheath skirt top is provided with continuously and be arranged at described in the burner of sheath skirt below, water supply by described heat exchanger is heated by described burner, it is characterized in that having the flame probe of the flame that produces with flame hole under the top normal combustion state that is positioned at described burner fire hungry ghosts who spit fire, give this flame probe making alive to detect flame current by the flame probe, when this flame current is lower than given threshold values, will close combustion controller from the gas electromagnetic valve of combustion gas to described burner that supply with, and offer import in the interior sheath skirt of upper end below described heat exchanger, and the bottom is provided with over against the circulating pipe of the burnt gas return duct of the flame hole place opening of placing described flame probe.
Gas heater according to claim 1 prevent imperfect combustion device, it is characterized in that described circulating pipe be by almost extend vertically downward from the upper end, the lower end constitutes by the trunk line of opening with from the described return duct of this trunk line intermediate section expenditure in the interior sheath skirt outside.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8328522 | 1996-12-09 | ||
| JP8328522A JPH10169977A (en) | 1996-12-09 | 1996-12-09 | Incomplete combustion prevention apparatus for gas hot water heater |
| JP328522/1996 | 1996-12-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1184917A true CN1184917A (en) | 1998-06-17 |
| CN1118662C CN1118662C (en) | 2003-08-20 |
Family
ID=18211231
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97112003A Expired - Fee Related CN1118662C (en) | 1996-12-09 | 1997-05-12 | Non-complete combustion prevention device for gas water heater |
Country Status (5)
| Country | Link |
|---|---|
| JP (1) | JPH10169977A (en) |
| KR (1) | KR100250395B1 (en) |
| CN (1) | CN1118662C (en) |
| HK (1) | HK1009480A1 (en) |
| TW (1) | TW434385B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594869A (en) * | 2020-06-15 | 2020-08-28 | 珠海格力电器股份有限公司 | Gas water heater control method, device and system and gas water heater |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102072560A (en) * | 2011-01-21 | 2011-05-25 | 广东万家乐燃气具有限公司 | Hot water discharging temperature rapid-stabilizing structure of central gas water heater |
-
1996
- 1996-12-09 JP JP8328522A patent/JPH10169977A/en active Pending
-
1997
- 1997-05-12 CN CN97112003A patent/CN1118662C/en not_active Expired - Fee Related
- 1997-05-26 TW TW086107106A patent/TW434385B/en not_active IP Right Cessation
- 1997-06-04 KR KR1019970023010A patent/KR100250395B1/en not_active IP Right Cessation
-
1998
- 1998-09-04 HK HK98110422A patent/HK1009480A1/en not_active IP Right Cessation
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111594869A (en) * | 2020-06-15 | 2020-08-28 | 珠海格力电器股份有限公司 | Gas water heater control method, device and system and gas water heater |
Also Published As
| Publication number | Publication date |
|---|---|
| KR19980063327A (en) | 1998-10-07 |
| KR100250395B1 (en) | 2000-08-01 |
| JPH10169977A (en) | 1998-06-26 |
| HK1009480A1 (en) | 1999-06-04 |
| CN1118662C (en) | 2003-08-20 |
| TW434385B (en) | 2001-05-16 |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20030820 Termination date: 20100512 |