CN110220312B - Control method of gas water heater and gas water heater - Google Patents
Control method of gas water heater and gas water heater Download PDFInfo
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- CN110220312B CN110220312B CN201810174565.XA CN201810174565A CN110220312B CN 110220312 B CN110220312 B CN 110220312B CN 201810174565 A CN201810174565 A CN 201810174565A CN 110220312 B CN110220312 B CN 110220312B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 130
- 238000000034 method Methods 0.000 title claims abstract description 22
- 238000004519 manufacturing process Methods 0.000 claims abstract description 27
- 238000006243 chemical reaction Methods 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 69
- 230000020169 heat generation Effects 0.000 claims description 17
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 8
- 239000003546 flue gas Substances 0.000 claims description 8
- 238000004868 gas analysis Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 5
- 230000001105 regulatory effect Effects 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 abstract description 9
- 238000004134 energy conservation Methods 0.000 abstract description 4
- 230000009467 reduction Effects 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 3
- 230000008859 change Effects 0.000 abstract description 2
- 230000033228 biological regulation Effects 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000002737 fuel gas Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 238000003287 bathing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention belongs to the technical field of gas water heaters, and discloses a control method of a gas water heater and the gas water heater. The control method of the gas water heater is based on different opening degrees of a gas valve, different heat production amounts are generated in unit time during gas combustion, different heat conversion optimal efficiencies are set according to the different heat production amounts, the instant efficiency and the optimal efficiency of heat conversion are compared when the heat production amounts are fixed, and when the difference value between the instant efficiency and the optimal efficiency is larger than an allowable value, the water flow of the gas water heater is adjusted. And the gas water heater is controlled by using the control method of the gas water heater. According to the invention, the optimal efficiency is taken as an index, the water flow is adjusted through the comparison result of the instant efficiency and the optimal efficiency, the intelligent change is realized, the gas water heater is automatically adjusted to the optimal state for working, the unnecessary actions of equipment are reduced, the error rate is reduced, the heat generated by gas combustion can be fully utilized, and the effects of energy conservation and emission reduction are achieved.
Description
Technical Field
The invention relates to the technical field of gas water heaters, in particular to a control method of a gas water heater and the gas water heater.
Background
The gas water heater is also called as a gas water heater, and refers to a gas appliance which takes gas as fuel and transfers heat to cold water flowing through a heat exchanger in a combustion heating mode so as to achieve the purpose of preparing hot water. When the existing gas water heater works, heat generated by gas combustion cannot be fully converted, so that the gas cannot be combusted at the optimal efficiency, and energy waste is caused.
Disclosure of Invention
The invention aims to provide a control method of a gas water heater and the gas water heater, which can fully utilize heat generated by gas combustion.
In order to achieve the purpose, the invention adopts the following technical scheme:
a control method of a gas water heater sets different optimal heat conversion efficiencies aiming at different heat production quantities;
comparing the instant efficiency of heat conversion with the optimal efficiency at a certain heat generation amount;
when the difference between the instant efficiency and the optimal efficiency is greater than an allowable value, adjusting the water flow of the gas water heater to improve the instant efficiency.
Preferably, the water flow is adjusted within a certain range, and the adjusting range of the water flow is a comfort interval; the optimal efficiency is an optimal heat conversion efficiency when the water flow is within the comfort zone.
Preferably, the water flow corresponding to a certain heat generation amount at the optimal efficiency is calculated according to the water outlet temperature and the water inlet temperature; and when the water flow exceeds the comfort interval, the heat production quantity is changed.
Preferably, the comfort interval is 4L/min-8L/min.
Preferably, different optimum efficiencies correspond to different allowable values.
Preferably, the allowable value corresponding to the optimum efficiency is 1% of the optimum efficiency.
Preferably, the comparison between the instantaneous efficiency and the optimal efficiency is performed once at intervals until the difference between the instantaneous efficiency and the optimal efficiency is less than the allowable value.
A gas water heater is controlled by using the control method of the gas water heater.
Preferably, the water-saving control system comprises a water servo device, wherein the water servo device is arranged at the water inlet end of the gas water heater and electrically connected with a main control board of the gas water heater, and is used for monitoring the water inlet temperature and adjusting the water flow.
Preferably, the system comprises a flue gas analysis sensor, wherein the flue gas analysis sensor is arranged in a flue pipe of the gas water heater, is electrically connected to a main control board of the gas water heater, and is used for monitoring and calculating the instant efficiency.
The invention has the beneficial effects that: the optimal efficiency is used as an index, the water flow is adjusted through the comparison result of the instant efficiency and the optimal efficiency, the intelligent control system is increased intelligently, the gas water heater is automatically adjusted to the optimal state to work, a user does not need to frequently adjust the shower head, unnecessary actions of equipment are reduced, the error rate is reduced, heat generated by gas combustion can be fully utilized, and the effects of energy conservation and emission reduction are achieved.
Drawings
FIG. 1 is a flow chart of regulating water flow in a control method of a gas water heater according to an embodiment of the present invention;
FIG. 2 is a flow chart of the heat generation capacity conversion in the control method of the gas water heater according to the embodiment of the present invention;
fig. 3 is a flowchart of a control method of a gas water heater according to an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the invention and are not to be construed as limiting the invention.
The technical scheme of the invention is further explained by the specific implementation mode in combination with the attached drawings.
As shown in fig. 1 and 2, the present invention provides a control method for a gas water heater, based on different opening degrees of a gas valve, the gas has different heat generation amounts per unit time during combustion, different optimal heat conversion efficiencies are set for the different heat generation amounts, when the heat generation amount is constant, the instant efficiency and the optimal efficiency of the heat conversion are compared, and when the difference between the instant efficiency and the optimal efficiency is greater than an allowable value, the water flow rate of the gas water heater is adjusted to improve the instant efficiency. In the embodiment, the optimal efficiency corresponding to each of the different heat generation amounts is obtained through early-stage experimental statistics.
According to the invention, the optimal efficiency is taken as an index, the water flow is adjusted through the comparison result of the instant efficiency and the optimal efficiency, the intelligent change is realized, the gas water heater is automatically adjusted to the optimal state for working, the shower head does not need to be frequently adjusted by a user, the unnecessary actions of equipment are reduced, the error rate is reduced, the heat generated by gas combustion can be fully utilized, and the effects of energy conservation and emission reduction are achieved.
In this embodiment, for improving user's use experience, avoid discharge too big or undersize, set the control range of discharge in certain interval, this interval is comfortable interval, and corresponding to this, optimal efficiency is the optimal heat conversion efficiency of discharge when comfortable interval. Specifically, in the embodiment, the comfort interval is set to 4L/min to 8L/min, and besides, the comfort interval may be set according to the actual requirements of the user. Above-mentioned setting has improved user's use and has experienced, has avoided making discharge too big or undersize for reaching optimal efficiency.
Specifically, after the gas water heater is started to be used, the water outlet temperature of water flow set by a user and the water inlet temperature of a pipeline detected by the detection equipment are firstly used for calculating the water flow corresponding to a certain heat production amount at the optimal efficiency, and when the water flow corresponding to the heat production amount exceeds a comfortable interval, the heat production amount is changed. In this embodiment, the water flow rate corresponding to the optimal efficiency is obtained by instantaneous calculation through a thermodynamic formula, or instantaneous extraction through statistical storage in advance. Above-mentioned setting has avoided under certain heat production quantity, in comfortable interval within range, instant efficiency and optimal efficiency differ too big all the time, and make discharge regulation unable the end, influence user's use experience.
Specifically, to further improve the user experience, different optimal efficiencies correspond to different allowable values. In the present embodiment, the allowable value corresponding to the optimum efficiency is 1% of the optimum efficiency. The arrangement enables the allowable value to be correspondingly adjusted according to the optimal efficiency under each grade of heat production of the fuel gas.
In this embodiment, the comparison between the instantaneous efficiency and the optimum efficiency is performed once at intervals until the difference between the instantaneous efficiency and the optimum efficiency is smaller than the allowable value. Above-mentioned setting has effectively reduced the regulating frequency of discharge to avoided once water flow control back, the gas heater equipment does not fully make the instant efficiency of reaction time survey inaccurate.
Referring to fig. 3, the control method of the gas water heater according to the present invention is discussed in steps, specifically, the heat generation amounts per unit time of the gas at different opening degrees of the gas valve are sequentially set as the first heat generation amount Q1Second heat production quantity Q2The third heat generation quantity Q3The fourth heat generation quantity Q4… … nth heat generation quantity QnAnd, the first amount of heat production Q1Corresponding to the first optimum efficiency eta1Second heat production quantity Q2Corresponding to the second optimum efficiency eta2The third heat generation quantity Q3Corresponding to the third optimum efficiency eta3… … nth heat generation quantity QnCorresponding to the nth optimum efficiency etan。
Step one, setting the water outlet temperature and detecting the water inlet temperature.
After the gas water heater is started, a user sets the water outlet temperature according to the requirement of the user, and the water inlet temperature of the pipeline is detected through the detection equipment.
And step two, calculating the corresponding water flow of the first heat production quantity at the first optimal efficiency according to the water outlet temperature and the water inlet temperature.
In this step, the corresponding water flow rate of the first heat generation amount at the first optimal efficiency is obtained by instantaneous calculation through a thermodynamic formula or instantaneous extraction through statistical storage in advance.
And step three, judging whether the calculated water flow is in a comfortable interval, if so, taking the first heat production amount as a target heat production amount, taking the first optimal efficiency as target efficiency, taking the water flow calculated by the first heat production amount under the first optimal efficiency as the target water flow, otherwise, sequentially calculating the water flow corresponding to the next heat production amount under the next optimal efficiency until the calculated water flow is in the comfortable interval, taking the heat production amount at the moment as the target heat production amount, taking the optimal efficiency corresponding to the heat production amount at the moment as the target efficiency, and taking the water flow calculated according to the heat production amount at the moment as the target water flow.
In this step, Q is sequentially judged1、Q2、Q3、Q4……QnAnd finding out heat production quantity gear values (different gear values of the gas water heater correspond to different heat production quantities) which can meet the water inlet temperature and the water outlet temperature.
And step four, adjusting the gas water heater to work under the target heat production quantity and the target water flow.
And step five, detecting the instant efficiency at the moment.
And step six, judging whether the difference value between the instant efficiency and the target efficiency is greater than 1% of the target efficiency, if so, adjusting the water flow and returning to the step five, and if not, performing the next step.
And step seven, the gas water heater works in the state.
The invention also provides a gas water heater which is controlled by using the control method of the gas water heater.
According to the gas water heater, on the premise that a user is satisfied with bathing with water, energy conservation, emission reduction and intelligent increase can be achieved, the maximum utilization rate of gas is achieved, the emission of pollutants in air is reduced, the frequent adjustment of a shower head by the user is not needed, unnecessary actions of equipment are reduced, and the error rate in operation is effectively reduced.
Specifically, this gas heater includes water servo, and this water servo installs in gas heater's the end of intaking, and the electricity is connected in gas heater's main control board for monitor into water temperature and regulation water flow. The water server specifically comprises a temperature sensor and an electromagnetic valve capable of controlling the flow rate of inflow water, and the water server is conventional equipment in the field, and the specific structure and the working principle of the water server are not described herein again.
More specifically, the gas water heater further comprises a flue gas analysis sensor, wherein the flue gas analysis sensor is installed in a flue pipe of the gas water heater and electrically connected to a main control board of the gas water heater, and is used for monitoring and calculating the instant efficiency. The flue gas analysis sensor comprises a temperature sensor and a flue gas analyzer, the combustion efficiency of the fuel gas is measured and calculated by analyzing the temperature of exhaust gas in a flue pipe of the gas water heater and the cost, the flue gas analysis sensor is conventional equipment in the field, and the specific structure and the working principle are not repeated herein.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (9)
1. A control method of a gas water heater is characterized in that different optimal heat conversion efficiencies are set for different heat production quantities;
comparing the instant efficiency of heat conversion with the optimal efficiency at a certain heat generation amount;
when the difference value between the instant efficiency and the optimal efficiency is larger than an allowable value, adjusting the water flow of the gas water heater to improve the instant efficiency;
the water flow is regulated within a certain range, and the regulating range of the water flow is a comfortable interval;
the optimal efficiency is an optimal heat conversion efficiency when the water flow is within the comfort zone.
2. The method of claim 1, wherein the water flow rate corresponding to a certain amount of heat generation at the optimal efficiency is calculated according to the outlet water temperature and the inlet water temperature;
and when the water flow exceeds the comfort interval, the heat production quantity is changed.
3. The control method of a gas water heater according to claim 1, wherein the comfort zone is 4L/min to 8L/min.
4. The control method of a gas water heater according to claim 1, wherein different said optimum efficiencies correspond to different said allowable values.
5. The control method of a gas water heater according to claim 4, wherein the allowable value for the optimum efficiency is 1% of the optimum efficiency.
6. The control method of a gas water heater according to claim 1, wherein the comparison of the instant efficiency and the optimum efficiency is performed once every interval until a difference between the instant efficiency and the optimum efficiency is less than the allowable value.
7. A gas water heater characterized by being controlled by the control method of the gas water heater according to any one of claims 1 to 6.
8. The gas water heater of claim 7, including a water servo mounted to the water inlet end of the gas water heater and electrically connected to the gas water heater main control board for monitoring the inlet water temperature and regulating the water flow rate.
9. The gas water heater of claim 7, including a flue gas analysis sensor mounted in a flue tube of the gas water heater electrically connected to a main control board of the gas water heater for monitoring and calculating the instantaneous efficiency.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810174565.XA CN110220312B (en) | 2018-03-02 | 2018-03-02 | Control method of gas water heater and gas water heater |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810174565.XA CN110220312B (en) | 2018-03-02 | 2018-03-02 | Control method of gas water heater and gas water heater |
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| CN110220312A CN110220312A (en) | 2019-09-10 |
| CN110220312B true CN110220312B (en) | 2022-04-22 |
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| CN110848987A (en) * | 2019-09-12 | 2020-02-28 | 广州腾世智能控制系统有限公司 | Control system and method for sectional variable-frequency gas heating water heater |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2479425Y (en) * | 2001-05-09 | 2002-02-27 | 王云腾 | Water intake regulating device of water heater |
| CN102374661B (en) * | 2010-08-13 | 2013-09-18 | 关隆股份有限公司 | Safety detection method for water heater |
| KR101524813B1 (en) * | 2013-10-31 | 2015-05-29 | 린나이코리아 주식회사 | Method for improving performance of boiler by propotional control for circulating pump |
| CN104848522A (en) * | 2015-04-27 | 2015-08-19 | 上海正克电器有限公司 | Preheating and instantaneous heating dual-mode electric water heater |
| CN106482336B (en) * | 2015-05-02 | 2019-03-26 | 陈则韶 | One kind makes Teat pump boiler winter go out heat and maximumlly adds hot water method |
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