CN104110896B - A kind of gas heater of tape lifetime clocking capability - Google Patents
A kind of gas heater of tape lifetime clocking capability Download PDFInfo
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- CN104110896B CN104110896B CN201410380399.0A CN201410380399A CN104110896B CN 104110896 B CN104110896 B CN 104110896B CN 201410380399 A CN201410380399 A CN 201410380399A CN 104110896 B CN104110896 B CN 104110896B
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Abstract
A kind of gas heater of tape lifetime clocking capability, including gas burning system, inlet and outlet system and control circuit, the gas burning system includes air inlet pipe, gas valve and combustion heat exchanger, the combustion heat exchanger is furnished with igniter, the inlet and outlet system includes water inlet pipe, heat exchange coil and outlet pipe, the gas valve and the igniter are connected with control circuit, it is characterised in that：The control circuit is provided with input circuit and timing screened circuit, and the timing screened circuit shields any one or more in the gas valve, the igniter and the input circuit.The gas heater of the tape lifetime clocking capability provided according to the present invention has the following advantages that compared with prior art：The present invention is avoided because the super time limit of user causes the generation of security incident using gas heater by setting timing screened circuit on the control circuit of gas heater from source.
Description
Technical field
The present invention relates to gas heater, more particularly to a kind of gas heater of tape lifetime clocking capability.
Background technology
In recent years, with the raising developed rapidly with living standards of the people of China's gas industry, gas heater industry
Also develop rapidly.Year sales volume is up to more than ten million platform, and this is for promoting the development of gas industry to serve positive role.But simultaneously
It should be seen that, due to causing poisoning, death by accident to happen occasionally using gas heater, this has caused the concern of the whole society.
Although gas heater currently on the market is generally forced-ventilated and balanced type, mostly there is more complete security system, including it is flame-out
Protection, the too high protection of hydraulic pressure, anti-dry protection, anti-overtemperature protection, anti-frost protection, leakproof gas shielded etc., and some combustion gas heat
Hydrophone has had " carbon monoxide security protection system ", the carbonomonoxide concentration that can be uninterruptedly monitored in air with 24 hours,
Once it is exceeded will alarm at once and take die, clean, the safeguard measure such as waste air.If but exceed the time limit to use, still suffer from greatly
Potential safety hazard.Useful life is arrived, the situation of gas heater inevitably many components agings can causing property
Can decline：One is that the use of heat exchanger long-time can produce carbon distribution and corrosion, causes the thermal efficiency to reduce, and air consumption is improved；Two are
The easy aging deformation in burner flame hole, spray nozzle clogging causes ignition difficulties, easily triggers incomplete combustion, anthracemia thing
Therefore and detonation；Four be other safety device ageing failures, there is the potential safety hazards such as gas leakage, leak, dry combustion method.
Therefore, standard GB/T 17905-2008《Household gas burner has safety management rule》In explicitly point out, fire
Utensil is sentenced using the pressure of the water heater of artificial coal gas and is limited in useless year 6 years from being sold the same day, using liquefied petroleum gas and naturally
The pressure of the water heater of gas is sentenced the useless time limit and should be 8 years.
At present, universal phenomenon is that consumer does not know or thinked little of the requirement of gas heater service life so that the super time limit
Largely existed using the situation of gas heater, cause security incident to happen occasionally.
To make, user is safer, more efficiently use gas heater, and be reduced or avoided causes peace because the super time limit is used
The generation of full accident, except specification installs after sale service, installed by enterprise and professional that qualification is installed with corresponding burner,
Maintenance；Propaganda strength is increased, the measures such as the safe handling consciousness of consumer are improved.It is super mainly for domestic gas-fired water heater limitation
The present situation that the time limit is used, has invented a kind of " gas heater of tape lifetime clocking capability ", is avoided from source because user is super
The time limit uses and causes the generation of security incident.
The content of the invention
The technical problems to be solved by the invention are to overcome the deficiency of above-mentioned prior art can be in setting there is provided one kind
Time limit in normally use, the gas heater of tape lifetime clocking capability used is will be unable to after the time limit of setting.
The main technical schemes that the gas heater of tape lifetime clocking capability provided according to the present invention is used for：Including combustion
Gas system, inlet and outlet system and control circuit, the gas burning system include air inlet pipe, gas valve and combustion heat exchanger, the combustion
Burn heat exchanger and be furnished with igniter, the inlet and outlet system includes water inlet pipe, heat exchange coil and outlet pipe, the gas valve and described
Igniter is connected with control circuit, and the control circuit is provided with input circuit and timing screened circuit, the timing shielding
It is any one or more in gas valve, the igniter and the input circuit described in circuits mask.
The gas heater for the tape lifetime clocking capability that the present invention is provided also uses following attached technical scheme：
The timing screened circuit includes timing circuit and screened circuit.
The control circuit includes single-chip microcomputer IC1 and the firing circuit being connected with the single-chip microcomputer IC1, gas valve electricity
Road, fan circuit, temperature sensing circuit, sound light alarming circuit, display unit and power circuit, the gas valve circuit with it is described
Gas valve is connected, and the firing circuit is connected with the igniter.
The screened circuit includes crystal oscillator X1, electric capacity C1, C2, C3, C4, resistance R1；The filter capacitor C2 and decoupling electricity
Appearance C3 one end, which is connected, is followed by the single-chip microcomputer IC1 and the power circuit, anode and the power circuit of the electric capacity C1
It is connected, negative terminal is connected with one end of the resistance R1 and is followed by the single-chip microcomputer IC1, a termination single-chip microcomputer of the crystal oscillator X1
IC1 oscillator crystal input, the oscillator crystal output end of the other end and the single-chip microcomputer IC1, the one of the electric capacity C4
End is connected with single-chip microcomputer IC1 electric capacity pin, other end ground connection.
The timing circuit include clock chip IC2, crystal oscillator X2, electric capacity C6, C7, C5, battery BT, button SW1, SW2,
SW3、SW4；The clock chip IC2 is connected with the single-chip microcomputer IC1, the positive pole of the battery BT and the clock chip IC2
It is connected；The one of the decoupling capacitor C5 terminates the clock chip IC2 and the power circuit；The button SW1, SW2, SW3,
SW4 one end is connected with the single-chip microcomputer IC1 respectively, button SW1, SW2, SW3, SW4 other end is grounded respectively.
The model MB89F202 of the single-chip microcomputer IC1.
The model DS1302 of the clock chip IC2.
The sound light alarming circuit include sound alarm circuit and optical alarm circuit, the sound alarm circuit include resistance R4,
R5, driving triode Q1, buzzer or loudspeaker BUZ；The optical alarm circuit includes resistance R3 and LED.
The gas heater of the tape lifetime clocking capability provided according to the present invention has the following advantages that compared with prior art：
1st, the present invention on the control circuit of gas heater by setting timing screened circuit, when the use time of gas heater surpasses
When going out the service life of setting, necessary parts or circuit that timing screened circuit will be shielded in gas heater make it not produce
It is stopped on the premise of raw potential safety hazard, reaches the purpose that gas heater can not be used, it is more safe and reliable when using, from
Avoided on source because the super time limit of user causes the generation of security incident using gas heater；2nd, the timing circuit in the present invention
Specified service life and ultimate life can be set, warning is sent when specified service life is reached, but not stop immediately
Only work, prevent user in use because the specified service life of gas heater is reached and causes currently to use water inconvenience
Situation, more hommization；3rd, the present invention sets clock chip punctual timing in timing circuit, and more safety can during use
Lean on；4th, reserve battery is set in timing circuit, overcomes civil power dead electricity and cause timer interrupt phenomenon, it is ensured that life-span timing
Continuity.
Brief description of the drawings
Fig. 1 is the schematic block circuit diagram of the present invention.
Fig. 2 is the circuit theory diagrams of the present invention.
Fig. 3 is the subprogram block diagram of the present invention.
Embodiment
Referring to Fig. 1 to Fig. 3, the gas heater embodiment of the tape lifetime clocking capability provided according to the present invention, including combustion
Gas system, inlet and outlet system and control circuit, the gas burning system includes air inlet pipe, gas valve 11 and combustion heat exchanger, described
Combustion heat exchanger is furnished with igniter 21, and the inlet and outlet system includes water inlet pipe, heat exchange coil and outlet pipe, the gas valve 11
It is connected with the igniter 21 with control circuit, the control circuit is provided with input circuit 9 and timing screened circuit, described
Timing screened circuit shields any one or more in the gas valve 11, the igniter 21 and the input circuit 9.This
Invention is set by setting timing screened circuit on the control circuit of gas heater when the use time of gas heater exceeds
During the service life put, necessary parts or circuit that timing screened circuit will be shielded in gas heater make it not produce peace
It is stopped on the premise of full hidden danger, reaches the purpose that gas heater can not be used, avoided from source because of the super time limit of user
Cause the generation of security incident using gas heater.
Referring to Fig. 1 to Fig. 3, according to the above embodiments of the present invention, the control circuit includes single-chip microcomputer IC1, Yi Jiyu
Firing circuit 2, gas valve circuit 1, fan circuit 3, temperature sensing circuit 4, the sound light alarming circuit of the single-chip microcomputer IC1 connections
5th, display unit 6 and power circuit, the gas valve circuit 1 are connected with the gas valve 11, the firing circuit 2 and the point
Firearm 21 is connected.The firing circuit 2 connects 15 pin (universaling I/O port P04) of the single-chip microcomputer IC1, and the display unit 6 meets institute
Single-chip microcomputer IC1 30 pin (universaling I/O port P02) and 31 pin (universaling I/O port P03) are stated, the temperature sensing circuit 4 connects the list
Piece machine IC1 24 pin (A/D input port P40/AN0), the sound light alarming circuit 5 connect the single-chip microcomputer IC1 26 pin (general purpose I/
O mouthfuls of P42) and 27 pin (universaling I/O port P43), the fan circuit 3 connects 21 pin (universaling I/O port P70) of the single-chip microcomputer IC1,
The gas valve circuit 1 connects 17 pin (universaling I/O port P32), 18 pin (universaling I/O port P31) and 19 pin of the single-chip microcomputer IC1
(universaling I/O port P30), the input circuit 9 connects 5 pin (universaling I/O port P60) and 6 pin (universaling I/O ports of the single-chip microcomputer IC1
P61).The model MB89F202 of the single-chip microcomputer IC1.It is fan circuit in the present invention, temperature sensing circuit, display unit, defeated
Enter circuit and power circuit is more ripe circuit in the prior art, be no longer described in detail herein.
Referring to Fig. 1 to Fig. 3, according to the above embodiments of the present invention, the timing screened circuit includes timing circuit 8 and screen
Cover circuit 7.The screened circuit 7 includes crystal oscillator X1, electric capacity C1, C2, C3, C4, resistance R1, wherein, the electric capacity C2 is filtering
Electric capacity, electric capacity C3 is decoupling capacitor, the 32 pin power end (V of the single-chip microcomputer IC1CC) be connected with the power circuit simultaneously with filter
Ripple electric capacity C2, decoupling capacitor C3 one end are connected, and electric capacity C1 anode is connected with the power circuit, the one of negative terminal and resistance R1
End is connected with the 7 pin preset ends (RST) of the single-chip microcomputer IC1 again after being connected, crystal oscillator X1 one end and the 8 of the single-chip microcomputer IC1
Pin oscillator crystal output end (XO) connection, 9 pin oscillator crystal inputs (XI) of the other end and the single-chip microcomputer IC1 connect
Connect, electric capacity C4 one end is connected with the 16 pin capacitance terminals (C) of the single-chip microcomputer IC1, other end ground connection.
The timing circuit 8 include clock chip IC2, crystal oscillator X2, electric capacity C6, C7, C5, battery BT, button SW1, SW2,
SW3、SW4.Wherein electric capacity C5 decoupling capacitors, button when SW1 is school, SW2 for plus (+) button, SW3 is subtracts (-) button, and SW4 is
Set button；5 pin (reset/RST mouthfuls of chip select line) of the clock chip IC2 and single-chip microcomputer IC1 12 pin (universaling I/O ports
P36) it is connected, 13 pin (universaling I/O port P35) phases of 6 pin (I/O mouthfuls of serial data) and single-chip microcomputer IC1 of the clock chip IC2
Even, 7 pin (clock input SCLK) of the clock chip IC2 and single-chip microcomputer IC1 14 pin (universaling I/O port P34) phases
Even；Clock chip IC2 8 pin (back-up source VCC1) be connected with battery BT positive pole；Clock chip IC2 1 pin (main power source
VCC2) be connected and be connected with decoupling capacitor C5 one end with the power circuit, one end of the crystal oscillator X2 connects the electric capacity simultaneously
C6 one end and the clock chip IC2 2 pin (oscillator inputs X1), the other end of the crystal oscillator X2 connect the electric capacity simultaneously
C7 one end and the clock chip IC2 3 pin (oscillator exports X2), the other end of the electric capacity C6 and the electric capacity C7's
The other end is connected and is grounded；Button SW1 one end and IC1 1 pin (universaling I/O port P04) connection, the other end ground connection during school, plus
(+) button SW2 one end and IC1 2 pin (universaling I/O port P05) connection, the other end are grounded, subtract (-) button SW3 one end with
IC1 3 pin (universaling I/O port P06) connection, other end ground connection, setting button SW4 one end and IC1 4 pin (universaling I/O ports
P07) connection, other end ground connection.RAM memory is provided with the clock chip IC2；The model of the clock chip IC2
DS1302.Timing circuit in the present invention uses clock chip DS1302 punctual timings, more safe and reliable during use；
Set battery BT as reserve battery in timing circuit, overcome civil power dead electricity and cause timer interrupt phenomenon, it is ensured that the life-span
The continuity of timing.
Referring to Fig. 1 to Fig. 3, according to the above embodiments of the present invention, the sound light alarming circuit 5 include sound alarm circuit and
Optical alarm circuit, the sound alarm circuit includes resistance R4, R5, driving triode Q1, buzzer or loudspeaker BUZ；The light
Warning circuit includes resistance R3 and LED.The LED one terminates 27 pin of the single-chip microcomputer IC1
(universaling I/O port P43), another termination resistance R3 one end, another termination power circuit of the resistance R3；It is described
A resistance R4 termination single-chip microcomputer IC1 26 pin (universaling I/O port P42), another termination three pole of the resistance R4
Pipe Q1 base stage, the grounded emitter of the triode Q1, the colelctor electrode of the triode Q1 connects the one of the buzzer BUZ
End, another termination resistance R5 of buzzer BUZ one end, another termination power circuit of the resistance R5.
When the present invention is specifically used, switched on power debugging by installing attendant after sale, step is as follows:1st, switch on power,
After to be shown ten seconds initialize, by button SW1 more than tri- seconds during school, into pattern during school；Now, can be by adding (+) button SW2
Or subtract (-) button SW3 and will show that year, month, day, hour, min, second are corrected according to current real-time time；Key when correction finishes short-press school
SW1 is exited.2nd, by button SW4 is set more than tri- seconds, into setting pattern；It is introduced into the setting of specified service life time (such as
The use of the water heater of artificial coal gas is 6 years, the use of the water heater of liquefied petroleum gas or natural gas is 8 years) now, can be by adding (+)
Button SW2 subtracts (-) button SW3 and will show that year, month, day, hour, min, second are adjusted to correction time plus specified service life time；
The setting that setting finishes short-press setting button SW4 into ultimate life time (such as Jia 2 small on the specified service life time
When), method is ibid；Setting finishes short-press setting button SW4 again and exits setting.Life timer is to start working.This hair
Timing circuit 8 in bright can set specified service life and ultimate life, and police is sent when specified service life is reached
Show, but not be stopped immediately, prevent user in use due to gas heater specified service life reach and
Cause the current situation with water inconvenience, more hommization.
Referring to Fig. 1 and Fig. 3, the course of work provided according to the present invention：In the case of mains-supplied, single-chip microcomputer IC1 is not
The real-time time and setting time of RAM memory in clock chip IC2 are read disconnectedly, and are compared：When real-time time >=volume
When determining setting value, interruption alarm and blinking red lamp are sent；When real-time time >=limit setpoint, the alarm that sends that one is long and the other is short
Sound and red light length are bright, simultaneously close off and screened ignition circuit 2 and gas valve circuit 1.In addition, when civil power dead electricity or gas heater
During dump, clock chip IC2 is powered by reserve battery BT, is overcome civil power dead electricity and is caused timer interrupt phenomenon, it is ensured that
The continuity of life-span timing.
The explanation of above-mentioned time parameter：1st, the initial real time correction time be commissioning staff's field adjustable when year, month, day,
When, the minute, second current real time correction time.2nd, real-time time is the current real-time time during use.3rd, specified setting value is
The specified service life time is that the real-time time of above-mentioned steps 1 adds Rated life (if the water heater using artificial coal gas is 6
Year, the use of the water heater of liquefied petroleum gas or natural gas is 8 years).4th, it is above-mentioned the ultimate life time that limit setpoint, which is,
The time of step 2 adds 2 hours again.
When control panel built-in switch SW1, which is closed, to be connected, the pin of single-chip microcomputer IC1 the 1st are low level, pass through programme-control timing
Circuit 8 works：
(1) when timing is cumulative between≤the specified service life time when, the sound letter of the pin of single-chip microcomputer IC1 the 26th output discontinuity
Number, driving buzzer BUZ sends the short acoustic alarm of interruption after amplifying through triode Q1, while defeated by single-chip microcomputer IC1 the 27th pin
Go out the flicker of pulsed drive LED；Reaching prompting user, " the specified useful life of gas heater has been arrived, it is necessary in time
The purpose of replacing ".
(2) when timing adds up Shi Jian≤ultimate life time, single-chip microcomputer IC1 the 26th pin exports what one is long and the other is short
Acoustical signal, driving buzzer BUZ sends the alarm that one is long and the other is short after amplifying through triode Q1, and by the 27th of single-chip microcomputer IC1 the
Pin exports low level, makes LED length bright；Single-chip microcomputer IC1 the 15th pin exports low level, screened ignition circuit simultaneously
2 prevent igniter 21 from working, or single-chip microcomputer IC1 the 17th, 18,19 pin export low level, shielding gas valve circuit 1 makes combustion
Air valve 11 can not work, or single-chip microcomputer IC1 the 5th, 6 pin export low level, shielding input circuit 9 prevent input circuit 9 from
(input circuit 9 refers to the button on gas heater control panel and/or the infrared receiver electricity with extraneous remote control cooperation for work
Road), reach the purpose for reminding and forbidding user to use in the ultralimit life-span again, it is desirable to must change.Single-chip microcomputer IC1 can also be same
When screened ignition circuit 2, gas valve circuit 1, any one or more, screen while the present embodiment is preferred in input circuit 9
Cover firing circuit 2 and gas valve circuit 1.Screened ignition circuit 2 and gas valve circuit 1, prevent gas leakage, it is not being produced
It is stopped on the premise of potential safety hazard, it is more safe and reliable when using.Realization simple in construction, easy of the invention in summary,
Production cost is low, in the case of particularly current user uses exceeding the time limit the hidden danger understanding of gas heater not enough or ignorant,
Acted on preferable alarm and reduce the probability that accident occurs caused by exceeding the time limit to use.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
Understanding these embodiments can be changed without departing from the principles and spirit of the present invention, the scope of the present invention by
Appended claims and its equivalent are limited.
Claims (8)
1. a kind of gas heater of tape lifetime clocking capability, including gas burning system, inlet and outlet system and control circuit, the combustion
Gas system includes air inlet pipe, gas valve and combustion heat exchanger, and the combustion heat exchanger is furnished with igniter, the inlet and outlet system bag
Water inlet pipe, heat exchange coil and outlet pipe are included, the gas valve and the igniter are connected with control circuit, it is characterised in that：
The control circuit is provided with input circuit and timing screened circuit, and the timing screened circuit shields the gas valve, described
It is any one or more in igniter and the input circuit.
2. the gas heater of tape lifetime clocking capability according to claim 1, it is characterised in that：The timing shielding electricity
Road includes timing circuit and screened circuit.
3. the gas heater of tape lifetime clocking capability according to claim 2, it is characterised in that：The control circuit bag
Include single-chip microcomputer IC1 and the firing circuit being connected with the single-chip microcomputer IC1, gas valve circuit, fan circuit, temperature detection electricity
Road, sound light alarming circuit, display unit and power circuit, the gas valve circuit are connected with the gas valve, the ignition power
Road is connected with the igniter.
4. the gas heater of tape lifetime clocking capability according to claim 3, it is characterised in that：The screened circuit bag
Include crystal oscillator X1, electric capacity C1, electric capacity C2, electric capacity C3, electric capacity C4, resistance R1；Electric capacity C2 is filter capacitor, and electric capacity C3 is decoupling electricity
Hold；Filter capacitor C2 is connected with decoupling capacitor C3 one end is followed by the single-chip microcomputer IC1 and the power circuit, the electric capacity C1
Anode be connected with the power circuit, negative terminal is connected with one end of the resistance R1 and is followed by the single-chip microcomputer IC1, the crystal oscillator
X1 termination single-chip microcomputer IC1 oscillator crystal input, another termination single-chip microcomputer IC1 oscillator crystal are defeated
Go out end, one end of the electric capacity C4 is connected with single-chip microcomputer IC1 electric capacity pin, other end ground connection.
5. the gas heater of tape lifetime clocking capability according to claim 4, it is characterised in that：The timing circuit bag
Include clock chip IC2, crystal oscillator X2, electric capacity C6, electric capacity C7, electric capacity C5, battery BT, button SW1, button SW2, button SW3, button
SW4；The clock chip IC2 is connected with the single-chip microcomputer IC1, and the positive pole of the battery BT is connected with the clock chip IC2；
Electric capacity C5 is decoupling capacitor, and the one of decoupling capacitor C5 terminates the clock chip IC2 and the power circuit；The button SW1,
Button SW2, button SW3, button SW4 one end are connected with the single-chip microcomputer IC1 respectively, the button SW1, button SW2, button
SW3, the button SW4 other end are grounded respectively.
6. the gas heater of the tape lifetime clocking capability according to claim 3-5 any one, it is characterised in that：It is described
Single-chip microcomputer IC1 model MB89F202.
7. the gas heater of tape lifetime clocking capability according to claim 5, it is characterised in that：The clock chip
IC2 model DS1302.
8. the gas heater of tape lifetime clocking capability according to claim 5, it is characterised in that：The sound and light alarm electricity
Road includes sound alarm circuit and optical alarm circuit, and the sound alarm circuit includes resistance R4, resistance R5, driving triode Q1, honeybee
Ring device or loudspeaker BUZ；The optical alarm circuit includes resistance R3 and LED.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410380399.0A CN104110896B (en) | 2014-08-04 | 2014-08-04 | A kind of gas heater of tape lifetime clocking capability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410380399.0A CN104110896B (en) | 2014-08-04 | 2014-08-04 | A kind of gas heater of tape lifetime clocking capability |
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| Publication Number | Publication Date |
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| CN104110896A CN104110896A (en) | 2014-10-22 |
| CN104110896B true CN104110896B (en) | 2017-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410380399.0A Active CN104110896B (en) | 2014-08-04 | 2014-08-04 | A kind of gas heater of tape lifetime clocking capability |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108227466A (en) * | 2018-03-08 | 2018-06-29 | 韦广用 | Electronics date manager |
| CN109798669A (en) * | 2019-01-29 | 2019-05-24 | 广东万家乐燃气具有限公司 | A kind of more water heater parallel systems |
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|---|---|---|---|---|
| WO2009136940A1 (en) * | 2008-05-09 | 2009-11-12 | Kidde-Fenwal, Inc. | Ignition control with safeguard function |
| CN102749840A (en) * | 2012-07-25 | 2012-10-24 | 浙江大学 | Timing device for light source life |
| CN102778019A (en) * | 2011-05-11 | 2012-11-14 | 宁波帅康热水器有限公司 | Instantaneous gas water heater with accurate temperature control |
| CN204084872U (en) * | 2014-08-04 | 2015-01-07 | 宁波帅康热水器有限公司 | A kind of gas heater of tape lifetime clocking capability |
-
2014
- 2014-08-04 CN CN201410380399.0A patent/CN104110896B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2009136940A1 (en) * | 2008-05-09 | 2009-11-12 | Kidde-Fenwal, Inc. | Ignition control with safeguard function |
| CN102778019A (en) * | 2011-05-11 | 2012-11-14 | 宁波帅康热水器有限公司 | Instantaneous gas water heater with accurate temperature control |
| CN102749840A (en) * | 2012-07-25 | 2012-10-24 | 浙江大学 | Timing device for light source life |
| CN204084872U (en) * | 2014-08-04 | 2015-01-07 | 宁波帅康热水器有限公司 | A kind of gas heater of tape lifetime clocking capability |
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