CN103123011B - Self-suction electromagnetic valve driving device of forced-ventilated gas water heater - Google Patents
Self-suction electromagnetic valve driving device of forced-ventilated gas water heater Download PDFInfo
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- CN103123011B CN103123011B CN201210379628.8A CN201210379628A CN103123011B CN 103123011 B CN103123011 B CN 103123011B CN 201210379628 A CN201210379628 A CN 201210379628A CN 103123011 B CN103123011 B CN 103123011B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 18
- 238000012360 testing method Methods 0.000 claims description 35
- 239000000853 adhesive Substances 0.000 claims description 12
- 230000001070 adhesive effect Effects 0.000 claims description 12
- 238000001514 detection method Methods 0.000 abstract 3
- 230000015556 catabolic process Effects 0.000 description 9
- 239000007789 gas Substances 0.000 description 6
- 238000012423 maintenance Methods 0.000 description 5
- 239000000567 combustion gas Substances 0.000 description 4
- 230000001960 triggered effect Effects 0.000 description 3
- 230000002159 abnormal effect Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000008878 coupling Effects 0.000 description 2
- 238000010168 coupling process Methods 0.000 description 2
- 238000005859 coupling reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 230000006870 function Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009841 combustion method Methods 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009993 protective function Effects 0.000 description 1
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Abstract
The invention discloses a self-priming electromagnetic valve driving device of a forced-ventilated gas water heater, which comprises a controller, an electromagnetic valve, a wind pressure switch and a temperature controller switch, wherein the common end of the electromagnetic valve is connected with one end of a power supply through the temperature controller switch, one end of the wind pressure switch is connected with the other end of the power supply, a wind pressure switch detection circuit is connected between the other end of the wind pressure switch and the controller, the controller is connected with a strong suction coil driving circuit and a holding coil driving circuit which are used for driving the electromagnetic valve, and an electromagnetic valve driving circuit detection circuit which is used for detecting the level of the output ends of the strong suction coil driving circuit and the holding coil driving circuit, the power end of the strong suction coil driving circuit is connected with the power supply through the wind pressure switch, and the detection end of the electromagnetic valve. The driving device has the advantages that the driving device can effectively prevent the electromagnetic valve from being out of control due to the failure of the controller, the failure of the driving pipe or the failure caused by high temperature, and avoid potential safety hazards.
Description
[technical field]
The present invention relates to a kind of Self-attracting solenoid valve drive unit of forced exhausting gas water heater, belong to electricity field.
[background technique]
At present, ordinary strong exhaust gas water-heater adopts the strong suction coil of MCU Direct driver self-suction type electromagnetic valve and keeping coil to control the break-make of combustion gas usually, and it has following shortcoming:
1, when MCU breaks down, strong coil of inhaling likely is energized, and solenoid valve can abnormal be opened, and is in runaway condition.
2, when driving the strong driving tube inhaling coil to break down breakdown, solenoid valve is also likely abnormal to be opened, and is in runaway condition.
3, when driving the driving tube of keeping coil to break down breakdown, after inhaling coil electricity once strong, solenoid valve cannot cut out, and the break-make of combustion gas is in runaway condition, easily leads to security incident.
In order to overcome above-mentioned defect and improve driving circuit for electromagnetic valve, I designs following technological scheme.
[summary of the invention]
Instant invention overcomes the deficiency of above-mentioned technology, provide a kind of Self-attracting solenoid valve drive unit of forced exhausting gas water heater, effectively can prevent the generation because controller breaks down, driving tube fault or high temperature cause fault and causes solenoid valve out of control by this drive unit, avoid producing potential safety hazard.
For achieving the above object, present invention employs following technical proposal:
A kind of Self-attracting solenoid valve drive unit of forced exhausting gas water heater, include controller 1, solenoid valve T2, blast switch S3, and temperature controller switch S4, described solenoid valve T2 coil is provided with solenoid valve and inhales by force end 21, solenoid valve maintains end 22 and solenoid valve common port 23, described solenoid valve common port 23 connects power supply one end by temperature controller switch S4, described blast switch S3 one end is connected with the power supply the other end, blast switch testing circuit 7 is connected with between the blast switch S3 the other end and controller 1, the strong suction coil driver 5 be connected with between end 21 for driving solenoid valve T2 adhesive inhaled by force by described controller 1 and solenoid valve, described strong suction coil driver 5 power end is connected with power supply by blast switch S3, described controller 1 and solenoid valve maintain the keeping coil drive circuit 6 be connected with between end 22 for maintaining solenoid valve T2 attracting state, described drive unit also includes for detecting the strong driving circuit for electromagnetic valve testing circuit 8 inhaling coil driver 5 and keeping coil drive circuit 6 output terminal level, test end and the solenoid valve of described driving circuit for electromagnetic valve testing circuit 8 maintain end 22 and are connected, driving circuit for electromagnetic valve testing circuit 8 output terminal is connected with controller 1.
Controller 1 as above is also connected with blower fan 10.
Described strong suction coil driver 5 includes electric capacity C5, resistance R51, resistance R52, PNP triode Q1, NPN triode Q3, and diode D3, described electric capacity C5 one end is connected with controller 1 as strong coil driver 5 control signal input end of inhaling, the electric capacity C5 the other end is connected with triode Q3 base stage by resistance R52, triode Q3 grounded-emitter connection, triode Q3 collector electrode is connected with triode Q1 base stage by resistance R51, triode Q1 emitter is connected with positive source by blast switch S3, triode Q1 collector electrode inhales by force end 21 as strong suction coil driver 5 control signal output terminal and solenoid valve, diode D3 negative pole connects, diode D3 plus earth.
Described keeping coil drive circuit 6 includes electric capacity C2, resistance R61, resistance R62, PNP triode Q2, described electric capacity C2 one end is connected with controller 1 as keeping coil drive circuit 6 control signal input end, the electric capacity C2 the other end is connected with triode Q2 base stage, triode Q2 emitter is connected with power supply, described resistance R62 is connected between power supply and triode Q2 base stage, and triode Q2 collector electrode maintains end 22 as keeping coil drive circuit 6 output terminal and solenoid valve and is connected.
Described keeping coil drive circuit 6 power end is connected with power supply by blast switch S3.
Described blast switch testing circuit 7 includes resistance R71 and resistance R72, described resistance R71 one end is connected with positive source by blast switch S3, the resistance R71 the other end is connected with controller 1, resistance R72 one end as testing signal output terminal, resistance R72 the other end ground connection.
Described driving circuit for electromagnetic valve testing circuit 8 includes diode D4, resistance R81, resistance R82, NPN triode Q4 and electric capacity C7, described diode D4 positive pole maintains end 22 as driving circuit for electromagnetic valve testing circuit 8 testing signal input end with solenoid valve and is connected, diode D4 negative pole is connected with resistance R81 one end, electric capacity C7 one end, the resistance R81 the other end is connected with triode Q4 base stage, triode Q4 collector electrode is connected with controller 1, resistance R82 one end, another termination positive source of resistance R82, ground connection after the electric capacity C7 the other end is connected with triode Q4 emitter.
The invention has the beneficial effects as follows:
1, the cold protection of system is realized by blast switch; system is when standby; blower fan does not start, and blower fan is in closed condition, and blast switch is in off state; make to inhale coil driver by force and power supply disconnects; at this moment no matter controller breaks down or inhaling by force coil driver driving tube breaks down, and all cannot be inhaled coil with electric current by force, and solenoid valve also just cannot adhesive; the passage of combustion gas is in off state, belongs to safe condition.
2, the heat protection function of system is realized by temperature controller switch; when water heater enters normal combustion; once occur high temperature; temperature controller switch can disconnect; the coil of solenoid valve is all disconnected the connection with power cathode; solenoid valve can be automatically closed, and blast tube is in off state, belongs to safe condition.
3, the strong suction pulse signal that controller exports passes through the strong combination switch inhaled on coil driver, control strong suction coil adhesive solenoid valve, lost efficacy once controller controls pin, this signal can be in a kind of level always, and the combination switch that last electric current consists of two triodes releases, and final suction by force with solenoid valve holds the driving tube be connected to be in cut-off state, strong suction coil passes through without enough electric currents, cannot adhesive solenoid valve, such blast tube is in off state, belongs to safe condition.
4, the maintenance pulse signal that controller exports controls the conducting of driving tube on keeping coil drive circuit by condenser coupling, Controlling solenoid valve maintains the electric current of end, lost efficacy once controller controls pin, this signal can be in a kind of level always, all can be charged by resistance in last electric capacity one end, the base stage of driving tube is finally caused to be high level, thus driving tube is in cut-off state, solenoid valve maintains end to be passed through without enough electric currents, solenoid valve cannot be maintained, solenoid valve closes again, and such blast tube is in off state, belongs to safe condition.
5, detected the state of blast switch by blast switch testing circuit, after blast switch triggers, controller carries out subsequent control.
6, system is at holding state, after blast switch triggers and switches on power, driving circuit for electromagnetic valve testing circuit detects strong the suction output state of coil driver, the output state of keeping coil drive circuit, if detect, solenoid valve maintains the level signal of holding is high level, namely have driving tube breakdown, controller enters lock state and outwards reports to the police.
7 once driving tube is breakdown, and namely driving circuit for electromagnetic valve testing circuit detects that solenoid valve maintains end is high level signal, and system is judged as fault.If the strong driving tube inhaled on coil driver is breakdown, controller stops exporting drived control pulse, such keeping coil drive circuit driving tube cut-off, and keeping coil does not maintain electric current, and solenoid valve closes again, and system enters lock state; If the driving tube on keeping coil drive circuit is breakdown, equally, controller stops exporting drived control pulse, when being heated to uniform temperature, temperature controller switch is triggered and is disconnected, and electromagnetic valve coil does not have electric current to flow through, solenoid valve closes again, and system enters lock state.
8, also connected the situation of power supply by blast switch at keeping coil drive circuit, namely the power supply of keeping coil drive circuit is also by the control of blast switch.
[accompanying drawing explanation]
Fig. 1 is structural representation of the present invention.
Fig. 2 is keeping coil drive circuit power end of the present invention connects power supply structural representation by blast switch.
Fig. 3 is the circuit theory diagrams of Fig. 1.
Fig. 4 is the circuit theory diagrams of Fig. 2.
[embodiment]
Be described in further detail below in conjunction with accompanying drawing and embodiments of the present invention:
As shown in Figure 1, a kind of Self-attracting solenoid valve drive unit of forced exhausting gas water heater, include controller 1, solenoid valve T2, blast switch S3, and temperature controller switch S4, described solenoid valve T2 coil is provided with solenoid valve and inhales by force end 21, solenoid valve maintains end 22 and solenoid valve common port 23, described solenoid valve common port 23 connects electric positive pole by temperature controller switch S4, described blast switch S3 one end is connected with power cathode, blast switch testing circuit 7 is connected with between the blast switch S3 the other end and controller 1, the strong suction coil driver 5 be connected with between end 21 for driving solenoid valve T2 adhesive inhaled by force by described controller 1 and solenoid valve, described strong suction coil driver 5 power end is connected with positive source by blast switch S3, described controller 1 and solenoid valve maintain the keeping coil drive circuit 6 be connected with between end 22 for maintaining solenoid valve T2 attracting state, described drive unit also includes for detecting the strong driving circuit for electromagnetic valve testing circuit 8 inhaling coil driver 5 and keeping coil drive circuit 6 output terminal level, test end and the solenoid valve of described driving circuit for electromagnetic valve testing circuit 8 maintain end 22 and are connected, driving circuit for electromagnetic valve testing circuit 8 output terminal is connected with controller 1.
Controller 1 as above is also connected with blower fan 10.
In the present invention, as shown in Figure 1,3, described keeping coil drive circuit 6 power end can directly be connected with positive source, as shown in Figure 2,4, described keeping coil drive circuit 6 power end is connected with positive source by blast switch S3, namely also carries out Energy control by blast switch S3 to keeping coil drive circuit 6.
As shown in Figure 1, 2, the adhesive loop that end 21, solenoid valve common port 23 and temperature controller switch S4 constitute solenoid valve T2 inhaled by force by described power supply, blast switch S3, strong suction coil driver 5, solenoid valve, and controller 1 is by strong adhesive of inhaling coil driver 5 Controlling solenoid valve T2.
As shown in Figure 1, described power supply, keeping coil drive circuit 6, solenoid valve maintain the attracting state maintenance loop that end 22, solenoid valve common port 23 and temperature controller switch S4 constitute solenoid valve T2, and controller 1 is by the maintenance of keeping coil drive circuit 6 Controlling solenoid valve T2 state.
As shown in Figure 2, described power supply, blast switch S3, keeping coil drive circuit 6, solenoid valve maintain the state maintenance loop that end 22, solenoid valve common port 23 and temperature controller switch S4 constitute solenoid valve T2, and controller 1 is by the maintenance of keeping coil drive circuit 6 Controlling solenoid valve T2 state.
As Fig. 3, shown in 4, described strong suction coil driver 5 includes electric capacity C5, resistance R51, resistance R52, PNP triode Q1, NPN triode Q3, and diode D3, described electric capacity C5 one end is connected with controller 1 as strong coil driver 5 control signal input end of inhaling, the electric capacity C5 the other end is connected with triode Q3 base stage by resistance R52, triode Q3 grounded-emitter connection, triode Q3 collector electrode is connected with triode Q1 base stage by resistance R51, triode Q1 emitter is connected with positive source by blast switch S3, triode Q1 collector electrode inhales by force end 21 as strong suction coil driver 5 control signal output terminal and solenoid valve, diode D3 negative pole connects, diode D3 plus earth.
The strong pulse signal inhaled coil driver 5 and exported by electric capacity C5 reception controller 1 as above, pulse signal controls the composite switch circuit be made up of triode Q3 and triode Q1 by electric capacity C5 coupling, thus controls to inhale by force coil 21 adhesive solenoid valve T2.Lost efficacy once controller 1 controls pin, this signal can be in a kind of level always, the electric charge of the last electric capacity C5 the other end all can be released by the emitter of resistance R52 and triode Q3, finally cause the base stage of triode Q3 to be in low level, triode Q3 can be in cut-off state, thus triode Q1 also can be in cut-off state, solenoid valve is inhaled by force end 21 and is passed through without enough electric currents, cannot adhesive solenoid valve T2, such blast tube is in off state, belongs to safe condition.
As shown in Figure 3, described keeping coil drive circuit 6 includes electric capacity C2, resistance R61, resistance R62, PNP triode Q2, described electric capacity C2 one end is connected with controller 1 as keeping coil drive circuit 6 control signal input end, the electric capacity C2 the other end is connected with triode Q2 base stage, triode Q2 emitter is connected with power supply, described resistance R62 is connected between power supply and triode Q2 base stage, and triode Q2 collector electrode maintains end 22 as keeping coil drive circuit 6 output terminal and solenoid valve and is connected.
As shown in Figure 4, described keeping coil drive circuit 6 power end is connected with positive source by blast switch S3, and the triggering realizing blast switch S3 is powered.
Keeping coil drive circuit 6 as above receives the pulse signal of controller 1 output by electric capacity C2, pulse signal is coupled by electric capacity C2 and controls triode Q2 switching circuit.Controller 1 controls pin and lost efficacy, this signal can be in a kind of level always, all can be charged by resistance R62, resistance R61 in last electric capacity C2 one end, the base stage of triode Q2 is finally caused to be high level, thus triode Q2 can be in cut-off state, cannot adhesive solenoid valve T2, such blast tube is in off state, belongs to safe condition.
As shown in Figure 3,4, the testing circuit of blast switch described in the present invention 7 includes resistance R71 and resistance R72, described resistance R71 one end is connected with positive source by blast switch S3, the resistance R71 the other end is connected with controller 1, resistance R72 one end as testing signal output terminal, resistance R72 the other end ground connection.
When water heater as above starts from holding state, first start the blower fan 10 on water heater, blast switch S3 is subject to triggering and connects, strong suction coil driver 5, keeping coil drive circuit 6 switch on power, blast switch testing circuit 7 detects that fan switch S3 is triggered, output signal to controller 1, controller 1 performs subsequent control.
As Fig. 3, shown in 4, the testing circuit of driving circuit for electromagnetic valve described in the present invention 8 maintains the level of end 22 for detecting solenoid valve, it includes diode D4, resistance R81, resistance R82, NPN triode Q4, and electric capacity C7, described diode D4 positive pole maintains end 22 as driving circuit for electromagnetic valve testing circuit 8 testing signal input end with solenoid valve and is connected, diode D4 negative pole and resistance R81 one end, electric capacity C7 one end connects, the resistance R81 the other end is connected with triode Q4 base stage, triode Q4 collector electrode and controller 1, resistance R82 one end connects, another termination positive source of resistance R82, ground connection after the electric capacity C7 the other end is connected with triode Q4 emitter.
As mentioned above, once driving tube is breakdown, namely driving circuit for electromagnetic valve testing circuit 8 detects that solenoid valve maintains end 22 is high level signal, and system is judged as fault.If the strong driving tube inhaled on coil driver 5 is breakdown, controller 1 stops exporting drived control pulse, such keeping coil drive circuit 6 driving tube cut-off, and keeping coil does not maintain electric current, and solenoid valve T2 closes again, and system enters lock state; If the driving tube on keeping coil drive circuit 6 is breakdown, equally, controller 1 stops exporting drived control pulse, at this moment when being heated to uniform temperature, temperature controller switch S4 is triggered and is disconnected, and electromagnetic valve coil does not have electric current to flow through, solenoid valve T2 closes again, and system enters lock state.
The present invention realizes the cold protective function of system by blast switch S3; system is when standby; blower fan 10 does not start; blast switch S3 is in off state; make to inhale by force coil driver 5 to disconnect with power supply, at this moment controller 1 breaks down or inhaling by force triode Q1, Q3 on coil driver 5 breaks down and all cannot provide electric current to strong coil 21 of inhaling, and solenoid valve T2 also just cannot adhesive; the passage of combustion gas is in off state, belongs to safe condition.
The present invention realizes the heat protection function of system by temperature controller switch S4; temperature controller switch S4 is not subject to being in closed state before high temperature triggers; when water heater enters normal combustion; once sense that temperature is too high, temperature controller switch S4 can disconnect, and on solenoid valve T2, coil is all disconnected the connection with power supply; solenoid valve T2 can be automatically closed; blast tube is in off state, belongs to safe condition, can prevent dry combustion method and other high temperature from surprisingly causing the generation of accident.
Improvement as mentioned above to existing driving circuit for electromagnetic valve; the description of this embodiment is not as the restriction to this case protection domain, and all are identical with this case circuit structure or on this case basis, make the design that equivalent circuit replaces all should show for falling in the protection domain of this case.
Claims (7)
1. the Self-attracting solenoid valve drive unit of a forced exhausting gas water heater, it is characterized in that including controller (1), solenoid valve (T2), blast switch (S3), and temperature controller switch (S4), described solenoid valve (T2) coil is provided with solenoid valve and inhales by force end (21), solenoid valve maintains end (22) and solenoid valve common port (23), described solenoid valve common port (23) connects power supply one end by temperature controller switch (S4), described blast switch (S3) one end is connected with the power supply the other end, blast switch testing circuit (7) is connected with between blast switch (S3) the other end and described controller (1), the strong suction coil driver (5) of holding and to be connected with between (21) for driving solenoid valve (T2) adhesive inhaled by force by described controller (1) and solenoid valve, described strong suction coil driver (5) power end is connected with power supply by blast switch (S3), described controller (1) and solenoid valve maintain the keeping coil drive circuit (6) held and to be connected with between (22) for maintaining solenoid valve (T2) attracting state, described drive unit also includes for detecting the driving circuit for electromagnetic valve testing circuit (8) inhaling by force coil driver (5) and keeping coil drive circuit (6) output terminal level, the test end of described driving circuit for electromagnetic valve testing circuit (8) maintains with solenoid valve holds (22) to be connected, driving circuit for electromagnetic valve testing circuit (8) output terminal is connected with described controller (1).
2. the Self-attracting solenoid valve drive unit of a kind of forced exhausting gas water heater according to claim 1, is characterized in that described controller (1) is also connected with blower fan (10).
3. the Self-attracting solenoid valve drive unit of a kind of forced exhausting gas water heater according to claim 1, it is characterized in that described strong suction coil driver (5) includes electric capacity C5, resistance R51, resistance R52, PNP triode Q1, NPN triode Q3, and diode D3, described electric capacity C5 one end is connected with described controller (1) as inhaling by force coil driver (5) control signal input end, the electric capacity C5 the other end is connected with triode Q3 base stage by resistance R52, triode Q3 grounded-emitter connection, triode Q3 collector electrode is connected with triode Q1 base stage by resistance R51, triode Q1 emitter is connected with positive source by blast switch (S3), triode Q1 collector electrode is inhaled by force hold (21) as being inhaled by force coil driver (5) control signal output terminal and solenoid valve, diode D3 negative pole connects, diode D3 plus earth.
4. the Self-attracting solenoid valve drive unit of a kind of forced exhausting gas water heater according to claim 1, it is characterized in that described keeping coil drive circuit (6) includes electric capacity C2, resistance R61, resistance R62, PNP triode Q2, described electric capacity C2 one end is connected with described controller (1) as keeping coil drive circuit (6) control signal input end, the electric capacity C2 the other end is connected with triode Q2 base stage, triode Q2 emitter is connected with power supply, described resistance R62 is connected between power supply and triode Q2 base stage, triode Q2 collector electrode maintains as keeping coil drive circuit (6) output terminal and solenoid valve holds (22) to be connected.
5. the Self-attracting solenoid valve drive unit of a kind of forced exhausting gas water heater according to claim 1 or 4, is characterized in that described keeping coil drive circuit (6) power end is connected with power supply by blast switch (S3).
6. the Self-attracting solenoid valve drive unit of a kind of forced exhausting gas water heater according to claim 1, it is characterized in that described blast switch testing circuit (7) includes resistance R71 and resistance R72, described resistance R71 one end is connected with positive source by blast switch (S3), the resistance R71 the other end is connected with described controller (1), resistance R72 one end as testing signal output terminal, resistance R72 the other end ground connection.
7. the Self-attracting solenoid valve drive unit of a kind of forced exhausting gas water heater according to claim 1, it is characterized in that described driving circuit for electromagnetic valve testing circuit (8) includes diode D4, resistance R81, resistance R82, NPN triode Q4, and electric capacity C7, described diode D4 positive pole maintains as driving circuit for electromagnetic valve testing circuit (8) testing signal input end and solenoid valve holds (22) to be connected, diode D4 negative pole and resistance R81 one end, electric capacity C7 one end connects, the resistance R81 the other end is connected with triode Q4 base stage, triode Q4 collector electrode and described controller (1), resistance R82 one end connects, another termination positive source of resistance R82, ground connection after the electric capacity C7 the other end is connected with triode Q4 emitter.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210379628.8A CN103123011B (en) | 2012-09-29 | 2012-09-29 | Self-suction electromagnetic valve driving device of forced-ventilated gas water heater |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210379628.8A CN103123011B (en) | 2012-09-29 | 2012-09-29 | Self-suction electromagnetic valve driving device of forced-ventilated gas water heater |
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| CN103123011A CN103123011A (en) | 2013-05-29 |
| CN103123011B true CN103123011B (en) | 2015-07-01 |
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| CN201210379628.8A Active CN103123011B (en) | 2012-09-29 | 2012-09-29 | Self-suction electromagnetic valve driving device of forced-ventilated gas water heater |
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| CN107620828B (en) * | 2017-09-20 | 2024-03-19 | 莱芜钢铁集团有限公司 | Electromagnetic valve emergency power supply equipment and blast furnace smelting furnace feeding system |
| CN211951612U (en) * | 2020-01-07 | 2020-11-17 | 星宇电子(宁波)有限公司 | Micro-power consumption electromagnetic valve |
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| CN202852141U (en) * | 2012-09-29 | 2013-04-03 | 中山华帝燃具股份有限公司 | Self-suction electromagnetic valve driving device of gas water heater |
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| US20090308332A1 (en) * | 2007-10-01 | 2009-12-17 | Tanbour Emadeddin Y | Water heater with forced draft air inlet |
| CN101303161B (en) * | 2008-06-12 | 2010-07-21 | 中山华帝燃具股份有限公司 | Intelligent gas water heater control method |
| CN102538214B (en) * | 2012-01-19 | 2014-03-05 | 中山华帝燃具股份有限公司 | Smoke discharge blockage control method and system for gas water heater |
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| CN202852141U (en) * | 2012-09-29 | 2013-04-03 | 中山华帝燃具股份有限公司 | Self-suction electromagnetic valve driving device of gas water heater |
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Address after: 528400 Guangdong Province, Zhongshan City Xiaolan Industrial Avenue South Road No. 1 Applicant after: Vatti Co., Ltd. Address before: 528400 Guangdong Province, Zhongshan City Xiaolan Industrial Avenue South Road No. 1 Applicant before: Zhongshan City Huadi Combustion Utensils Co., Ltd. |
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Free format text: CORRECT: APPLICANT; FROM: ZHONGSHAN CITY HUADI COMBUSTION UTENSILS CO., LTD. TO: VATTI CO., LTD. |
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