CN111981696A - Method for detecting scale formation of heat exchanger of gas hot water supply equipment and gas hot water supply equipment - Google Patents
Method for detecting scale formation of heat exchanger of gas hot water supply equipment and gas hot water supply equipment Download PDFInfo
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- CN111981696A CN111981696A CN202010719014.4A CN202010719014A CN111981696A CN 111981696 A CN111981696 A CN 111981696A CN 202010719014 A CN202010719014 A CN 202010719014A CN 111981696 A CN111981696 A CN 111981696A
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- hot water
- water supply
- gas hot
- heat exchanger
- supply equipment
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 129
- 238000000034 method Methods 0.000 title claims abstract description 18
- 230000015572 biosynthetic process Effects 0.000 title claims abstract description 8
- 238000011897 real-time detection Methods 0.000 claims abstract description 8
- 238000004140 cleaning Methods 0.000 claims description 9
- 238000010438 heat treatment Methods 0.000 description 2
- 238000011084 recovery Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- JLVVSXFLKOJNIY-UHFFFAOYSA-N Magnesium ion Chemical compound [Mg+2] JLVVSXFLKOJNIY-UHFFFAOYSA-N 0.000 description 1
- 238000007792 addition Methods 0.000 description 1
- 238000003287 bathing Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910001424 calcium ion Inorganic materials 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 229910001425 magnesium ion Inorganic materials 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 0.000 description 1
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
-
- 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
- F24H9/18—Arrangement or mounting of grates or heating means
- F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
- F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
- F24H9/1836—Arrangement or mounting of combustion heating means, e.g. grates or burners using fluid fuel
-
- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/18—Status alarms
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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)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- General Physics & Mathematics (AREA)
- Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
Abstract
The invention discloses a method for detecting scale formation of a heat exchanger of gas hot water supply equipment and the gas hot water supply equipment, wherein the method comprises the following steps: s1: testing the power Q1 of the corresponding design product according to the current of the proportional valve; s2: real-time detection of water inlet temperature T of gas hot water supply equipmentIntoWater outlet temperature TGo outAnd water flow rate; s3: inlet water temperature T of gas hot water supply equipment according to real-time detectionIntoWater outlet temperature TGo outAnd calculating the actual product power Q2 by water flow; s4, calculating a ratio according to the actual product power Q2 and the designed product power Q1 of the current of the corresponding proportional valve; s5: judging the heat exchanger scaling state and whether prompt information needs to be output according to the ratio and a preset scaling judgment value, and outputting the prompt information according to the actual product power Q2 and the designed productAnd judging the scaling state of the heat exchanger by the ratio of the power Q1, and outputting prompt information to remind a user so that the user can find and clean in time.
Description
Technical Field
The invention relates to the technical field of gas hot water supply equipment, in particular to a method for detecting scale formation of a heat exchanger of the gas hot water supply equipment and the gas hot water supply equipment.
Background
The gas hot water supply equipment generally comprises: the hot water function of the gas water heater or the wall-mounted furnace basically adopts an instant heating type heating mode, namely, high temperature generated by gas combustion is absorbed by the heat exchanger after the water is condensed to enter the water heater or the wall-mounted furnace, the temperature is increased to become warm water, and then the warm water flows out of the water heater or the wall-mounted furnace and is supplied to users for use through a shower head or a faucet.
Tap water or underground water is generally adopted by a water heater or a wall-mounted furnace as a water source, most of the water is not softened, the water quality in China is generally hard, the content of calcium and magnesium ions in the water is high, the bathing water temperature of the water heater or the wall-mounted furnace is generally between 40 ℃ and 60 ℃, the local temperature of a heat exchanger possibly needs to be higher than the temperature, the temperature reaches the lower limit of water quality scaling, the water scale in the heat exchanger is gradually accumulated and cannot be cleaned in time to a certain degree after the water heater or the wall-mounted furnace is used for a long time, the heat exchange efficiency of the water heater or the wall-mounted furnace is reduced, the smoke temperature is increased:
1. the gas consumption becomes large;
2. the water quantity is reduced;
3. the temperature of the hot water is reduced;
4. the venturi in the fan melts and deforms, and the product reports the wind pressure fault;
5. the heat exchanger is burned through and leaks water.
Disclosure of Invention
The invention aims to solve at least one of the problems in the prior art to a certain extent, and therefore, the invention provides a method for detecting the scaling of a heat exchanger of a gas hot water supply device and the gas hot water supply device.
A method for detecting scale formation of a heat exchanger of gas hot water supply equipment comprises the following steps:
s1: testing the power Q1 of the corresponding design product according to the current of the proportional valve;
s2: real-time detection of water inlet temperature T of gas hot water supply equipmentIntoWater outlet temperature TGo outAnd water flow rate;
s3: root of herbaceous plantInlet water temperature T of gas hot water supply equipment according to real-time detectionIntoWater outlet temperature TGo outAnd calculating the actual product power Q2 by water flow;
s4, calculating a ratio according to the actual product power Q2 and the designed product power Q1 of the current of the corresponding proportional valve;
s5: and judging the scaling state of the heat exchanger and whether prompt information needs to be output according to the ratio and a preset scaling judgment value.
Further, the calculation formula of the actual product power Q2 is:
Q2＝CM(Tgo out-TInto)；
Wherein C is the specific heat of water, and M is the mass of water.
Further, the preset fouling judgment value comprises a slight fouling value and a severe fouling value, and the slight fouling value is greater than the severe fouling value.
Further, in the step 5, the judging the scaling state of the heat exchanger and outputting the prompt information specifically includes:
if the ratio is smaller than the slight scaling value, judging that the heat exchanger is slightly scaled, and outputting prompt information, wherein the prompt information is cleaning and prompting;
if the ratio is smaller than the serious scaling value, judging that the heat exchanger is seriously scaled, and outputting prompt information, wherein the prompt information is cleaning prompt and fault alarm;
if the ratio is larger than the slight scaling value, judging that the heat exchanger is not scaled, and outputting prompt information is not needed.
Further, the cleaning reminding is a voice prompt and/or a display prompt.
Further, when the fault alarm is performed, the user needs to manually recover the operation, and the fault alarm is circulated in unit time until the ratio is greater than the slight scaling value, and then the normal operation state of the gas hot water supply equipment can be recovered.
The gas hot water supply equipment comprises a gas hot water supply equipment body and a controller, wherein the controller at least comprises the method for detecting the scale of the heat exchanger of the gas hot water supply equipment.
Further, the gas hot water supply device body is a gas water heater or a wall-mounted furnace.
Compared with the prior art, the invention at least comprises the following beneficial effects:
the invention judges the scaling state of the heat exchanger according to the ratio of the actual product power Q2 to the designed product power Q1, and outputs prompt information to remind a user, so that the user can find and clean the heat exchanger in time, and the problems of large gas consumption, small water quantity, reduced hot water temperature, venturi melting deformation in a fan, product wind pressure reporting fault, heat exchanger burnthrough water leakage and the like caused by scaling of the heat exchanger are prevented.
Drawings
FIG. 1 is a flow chart of a method for detecting fouling in a heat exchanger of a gas hot water supply apparatus according to the present invention;
FIG. 2 is a diagram showing the relationship between the product power and the proportional valve current.
Detailed Description
In order to make the technical solutions of the present invention better understood, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, shall fall within the scope of the claims of the present invention.
As shown in fig. 1-2, a method for detecting fouling of a heat exchanger of a gas hot water supply device includes the following steps:
s1: the corresponding design product power Q1 is tested according to the current of the proportional valve, the current of the proportional valve is used for controlling the gas flow, and the gas flow corresponds to the product power, so the design product power Q1 can be tested by adjusting the current of the proportional valve;
s2: real-time detection of water inlet temperature T of gas hot water supply equipmentIntoWater outlet temperature TGo outAnd water flowThe temperature sensors respectively arranged at the water inlet end and the water outlet end of the gas hot water supply device can detect the water inlet temperature T of the gas hot water supply deviceIntoAnd the temperature T of the outlet waterGo outDetecting water flow through a water flow sensor arranged in a main water channel in the gas hot water supply equipment;
s3: inlet water temperature T of gas hot water supply equipment according to real-time detectionIntoWater outlet temperature TGo outAnd calculating the actual product power Q2 by water flow;
s4, calculating a ratio according to the actual product power Q2 and the designed product power Q1 of the current of the corresponding proportional valve;
s5: according to the ratio and the preset scaling judgment value, the scaling state of the heat exchanger is judged and whether prompt information needs to be output or not is used for reminding a user of the scaling state of the heat exchanger, so that the heat exchanger can be cleaned timely by the user, the problems that gas consumption is increased, water quantity is reduced, the temperature of hot water is lowered, a venturi in a fan is melted and deformed, a product reports a wind pressure fault, the heat exchanger is burnt through and leaks and the like due to scaling of the heat exchanger are solved.
The calculation formula of the actual product power Q2 is as follows:
Q2＝CM(Tgo out-TInto)；
Wherein C is the specific heat of water, M is the mass of water, and the mass of water is obtained according to the detected water flow and the density of water.
The preset scaling judgment value comprises a slight scaling value and a serious scaling value, wherein the slight scaling value is larger than the serious scaling value.
In step 5 of the present invention, the steps of judging the scaling state of the heat exchanger and outputting the prompt information specifically include:
if the ratio is smaller than the slight scaling value, judging that the heat exchanger is slightly scaled, and outputting prompt information, wherein the prompt information is cleaning and prompting;
if the ratio is smaller than the serious scaling value, judging that the heat exchanger is seriously scaled, and outputting prompt information, wherein the prompt information is cleaning prompt and fault alarm;
if the ratio is larger than the slight scaling value, judging that the heat exchanger is not scaled, and outputting prompt information is not needed.
The cleaning prompt is a sound prompt and/or a display prompt, the sound prompt can be a buzzer, and the display prompt can be a screen prompt or a light flashing/normally-on prompt.
When the fault alarm is performed, a user needs to manually recover the operation, and the fault alarm is circulated in unit time until the ratio is greater than the slight scaling value, so that the normal operation state of the gas hot water supply equipment can not be recovered.
When the heat exchanger is in a slight scaling state, a user can continue to normally use the gas hot water supply equipment, and the gas hot water supply equipment is used for reminding the user to clean the heat exchanger;
when the heat exchanger is in a serious scaling state, a fault alarm occurs, the gas hot water supply equipment cannot be normally used at the moment, manual recovery of a user is needed, the fault alarm can be circulated again in unit time after recovery, and the normal operation state of the gas hot water supply equipment cannot be recovered until the specific value is detected to be larger than the slight scaling value, so that the user can timely clean the heat exchanger.
The gas hot water supply equipment comprises a gas hot water supply equipment body and a controller, wherein a water outlet end and a water inlet end of the gas hot water supply equipment body are respectively provided with a temperature sensor, the temperature sensors are used for detecting water temperature, a main water channel in the gas hot water supply equipment body is provided with a water flow sensor, the water flow sensor is used for detecting water flow, the controller is respectively electrically connected with the temperature sensors and the water flow sensor, and the controller at least comprises the above method for detecting the scale formation of the heat exchanger of the gas hot water supply equipment.
The gas hot water supply equipment body is a gas water heater or a wall-mounted furnace.
The above-mentioned embodiments are intended to illustrate the technical solutions and advantages of the present invention, and it should be understood that the above-mentioned embodiments are only the most preferred embodiments of the present invention, and are not intended to limit the present invention, and any modifications, additions, equivalents, etc. made within the scope of the principles of the present invention should be included in the scope of the present invention.
Claims (8)
1. A method for detecting the scale formation of a heat exchanger of a gas hot water supply device is characterized by comprising the following steps:
s1: testing the power Q1 of the corresponding design product according to the current of the proportional valve;
s2: real-time detection of water inlet temperature T of gas hot water supply equipmentIntoWater outlet temperature TGo outAnd water flow rate;
s3: inlet water temperature T of gas hot water supply equipment according to real-time detectionIntoWater outlet temperature TGo outAnd calculating the actual product power Q2 by water flow;
s4, calculating a ratio according to the actual product power Q2 and the designed product power Q1 of the current of the corresponding proportional valve;
s5: and judging the scaling state of the heat exchanger and whether prompt information needs to be output according to the ratio and a preset scaling judgment value.
2. The method for detecting the fouling of the heat exchanger of the gas hot water supply equipment according to claim 1, wherein the calculation formula of the actual product power Q2 is as follows:
Q2＝CM(Tgo out-TInto)；
Wherein C is the specific heat of water, and M is the mass of water.
3. The method of claim 1, wherein the preset scaling determination value comprises a slight scaling value and a severe scaling value, and the slight scaling value is greater than the severe scaling value.
4. The method for detecting the fouling of the heat exchanger of the gas hot water supply equipment according to claim 3, wherein in the step 5, the judging whether the fouling state of the heat exchanger and the output of the prompt message are required is specifically as follows:
if the ratio is smaller than the slight scaling value, judging that the heat exchanger is slightly scaled, and outputting prompt information, wherein the prompt information is cleaning and prompting;
if the ratio is smaller than the serious scaling value, judging that the heat exchanger is seriously scaled, and outputting prompt information, wherein the prompt information is cleaning prompt and fault alarm;
if the ratio is larger than the slight scaling value, judging that the heat exchanger is not scaled, and outputting prompt information is not needed.
5. The method for detecting fouling of a heat exchanger of a gas hot water supply device according to claim 4, wherein the cleaning prompt is an audio prompt and/or a display prompt.
6. The method for detecting the scaling of the heat exchanger of the gas hot water supply equipment according to claim 4, wherein when the fault alarm is given, a user needs to manually recover the operation, and the fault alarm is circulated in unit time until the ratio is greater than the slight scaling value, so that the normal operation state of the gas hot water supply equipment can not be recovered.
7. A gas hot water supply device, comprising a gas hot water supply device body and a controller, characterized in that the controller is at least provided with the method for detecting the scale formation of the heat exchanger of the gas hot water supply device according to any one of claims 1 to 6.
8. The gas hot water supply device according to claim 7, wherein the gas hot water supply device body is a gas water heater or a wall-mounted boiler.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010719014.4A CN111981696A (en) | 2020-07-23 | 2020-07-23 | Method for detecting scale formation of heat exchanger of gas hot water supply equipment and gas hot water supply equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010719014.4A CN111981696A (en) | 2020-07-23 | 2020-07-23 | Method for detecting scale formation of heat exchanger of gas hot water supply equipment and gas hot water supply equipment |
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| CN111981696A true CN111981696A (en) | 2020-11-24 |
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| CN202010719014.4A Pending CN111981696A (en) | 2020-07-23 | 2020-07-23 | Method for detecting scale formation of heat exchanger of gas hot water supply equipment and gas hot water supply equipment |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112890729A (en) * | 2021-01-19 | 2021-06-04 | 北京红岸水滴科技发展有限公司 | Scale detection method, water tank suitable for scale detection method and equipment comprising water tank |
| CN113252844A (en) * | 2021-04-19 | 2021-08-13 | 芜湖美的厨卫电器制造有限公司 | Method for detecting scale formation of heat exchange part of gas water heater and gas water heater |
| CN113883716A (en) * | 2021-10-28 | 2022-01-04 | 上海林内有限公司 | Gas water heater with water consumption point blockage monitoring function |
| CN114623598A (en) * | 2020-12-14 | 2022-06-14 | 艾沃（深圳）智能环境科技有限公司 | Heat exchanger maintenance system, maintenance method and heating and water heating equipment |
| CN115127848A (en) * | 2022-08-31 | 2022-09-30 | 山东汇通工业制造有限公司 | Heat exchanger pipeline blockage detection method |
| CN115143647A (en) * | 2022-07-08 | 2022-10-04 | 宁波方太厨具有限公司 | Fault diagnosis method, system, equipment, medium and water heater of gas water heater |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101586877A (en) * | 2009-07-06 | 2009-11-25 | 徐生恒 | Thermal balance type water heater |
| CN102563886A (en) * | 2012-01-06 | 2012-07-11 | 广东万家乐燃气具有限公司 | Adaptive gas water heater, system thereof and method for automatically judging gas types |
| EP2824398A1 (en) * | 2013-07-11 | 2015-01-14 | Mitsubishi Heavy Industries, Ltd. | Heat pump hot water supply system |
| CN105865575A (en) * | 2016-05-13 | 2016-08-17 | 珠海格力电器股份有限公司 | Electrode type water level switch, water heater and water level detection method thereof |
| CN109520130A (en) * | 2017-09-20 | 2019-03-26 | 青岛经济技术开发区海尔热水器有限公司 | Teat pump boiler blowdown control method and Teat pump boiler |
| CN109700321A (en) * | 2019-02-25 | 2019-05-03 | 佛山市顺德区阿波罗环保器材有限公司 | A kind of cleaning method of liquid heating apparatus and its hot-water heating system and the hot-water heating system |
-
2020
- 2020-07-23 CN CN202010719014.4A patent/CN111981696A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101586877A (en) * | 2009-07-06 | 2009-11-25 | 徐生恒 | Thermal balance type water heater |
| CN102563886A (en) * | 2012-01-06 | 2012-07-11 | 广东万家乐燃气具有限公司 | Adaptive gas water heater, system thereof and method for automatically judging gas types |
| EP2824398A1 (en) * | 2013-07-11 | 2015-01-14 | Mitsubishi Heavy Industries, Ltd. | Heat pump hot water supply system |
| CN105865575A (en) * | 2016-05-13 | 2016-08-17 | 珠海格力电器股份有限公司 | Electrode type water level switch, water heater and water level detection method thereof |
| CN109520130A (en) * | 2017-09-20 | 2019-03-26 | 青岛经济技术开发区海尔热水器有限公司 | Teat pump boiler blowdown control method and Teat pump boiler |
| CN109700321A (en) * | 2019-02-25 | 2019-05-03 | 佛山市顺德区阿波罗环保器材有限公司 | A kind of cleaning method of liquid heating apparatus and its hot-water heating system and the hot-water heating system |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114623598A (en) * | 2020-12-14 | 2022-06-14 | 艾沃（深圳）智能环境科技有限公司 | Heat exchanger maintenance system, maintenance method and heating and water heating equipment |
| CN112890729A (en) * | 2021-01-19 | 2021-06-04 | 北京红岸水滴科技发展有限公司 | Scale detection method, water tank suitable for scale detection method and equipment comprising water tank |
| CN113252844A (en) * | 2021-04-19 | 2021-08-13 | 芜湖美的厨卫电器制造有限公司 | Method for detecting scale formation of heat exchange part of gas water heater and gas water heater |
| CN113883716A (en) * | 2021-10-28 | 2022-01-04 | 上海林内有限公司 | Gas water heater with water consumption point blockage monitoring function |
| CN115143647A (en) * | 2022-07-08 | 2022-10-04 | 宁波方太厨具有限公司 | Fault diagnosis method, system, equipment, medium and water heater of gas water heater |
| CN115143647B (en) * | 2022-07-08 | 2024-03-15 | 宁波方太厨具有限公司 | Fault diagnosis method, system, equipment, medium and water heater of gas water heater |
| CN115127848A (en) * | 2022-08-31 | 2022-09-30 | 山东汇通工业制造有限公司 | Heat exchanger pipeline blockage detection method |
| CN115127848B (en) * | 2022-08-31 | 2022-11-11 | 山东汇通工业制造有限公司 | Heat exchanger pipeline blockage detection method |
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