CN110207388B - Intelligent shutdown control method for gas water heater - Google Patents
Intelligent shutdown control method for gas water heater Download PDFInfo
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- CN110207388B CN110207388B CN201811259590.4A CN201811259590A CN110207388B CN 110207388 B CN110207388 B CN 110207388B CN 201811259590 A CN201811259590 A CN 201811259590A CN 110207388 B CN110207388 B CN 110207388B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 369
- 238000000034 method Methods 0.000 title claims abstract description 28
- 239000008399 tap water Substances 0.000 claims abstract description 5
- 235000020679 tap water Nutrition 0.000 claims abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 3
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000003287 bathing Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006467 substitution reaction Methods 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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- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses an intelligent shutdown control method for a gas water heater, wherein a water outlet pipeline of the gas water heater is connected with a water return pipeline of the gas water heater through a first three-way valve to form a circulating pipeline, a water inlet pipeline is connected to the circulating pipeline through a second three-way valve, and one or more water-using devices are arranged on the water outlet pipeline and the water inlet pipeline; starting at least one water using device, starting the water pump, supplying tap water to the water using device through the water inlet pipeline, and supplying hot water heated by the gas water heater to the water using device through the water outlet pipeline; the water temperature flowing through the water return pipeline is collected in real time, namely the water inlet temperature T1According to the temperature T of the inlet water1Determining whether the water consumer is shut down in relation to the first temperature threshold; when the water utilization equipment is determined to be closed, a water pump of the gas water heater is closed, and whether the gas water heater is closed or not is determined according to the condition of water flow in the water outlet pipeline; the intelligent water-saving control system can intelligently identify whether the user turns off the water, so that the gas water heater can be turned off in time, and the energy waste is avoided.
Description
Technical Field
The invention belongs to the technical field of gas water heaters, and particularly relates to an intelligent shutdown control method for a gas water heater.
Background
The zero-cold-water gas water heater is characterized in that a zero-cold-water function is started under the condition that no water is boiled, a water pump in the water heater is started, after the water pump is started, hot water in a hot water pipeline flows up and flows out through a water outlet pipe of the water heater, the outflow water flows back to the water heater through a water return pipeline to form a circulating pipeline, after a water flow signal is detected by the water heater, combustion heating is started, after 3-5 minutes, all water in the whole circulating pipeline can be heated to a set temperature, when a user bathes, hot water exists in a shower head, cold water cannot flow out firstly, namely zero cold water; in order to improve the bathing experience, generally can increase the pressure boost function, however, because the user opens behind the pressure boost function, the water pump can start, even the user closes tap, because the water pump is in the on-state this moment, the water heater still can detect discharge, consequently can't judge whether the user closes water.
Disclosure of Invention
The invention aims to provide an intelligent shutdown control method for a gas water heater, which can intelligently identify whether a user shuts off water or not, further timely shuts down the gas water heater and avoids energy waste.
The technical scheme adopted by the invention is as follows:
an intelligent shutdown control method for a gas water heater is characterized in that a water outlet pipeline of the gas water heater is connected with a water return pipeline of the gas water heater through a first three-way valve to form a circulating pipeline, a water inlet pipeline of the gas water heater is connected to the circulating pipeline through a second three-way valve, and one or more water-using devices are arranged on the water outlet pipeline and the water inlet pipeline;
starting at least one water using device, starting a water pump of the gas water heater, supplying tap water to the water using device through a water inlet pipeline, and supplying hot water heated by the gas water heater to the water using device through a water outlet pipeline; the water temperature flowing through the water return pipeline is collected in real time, namely the water inlet temperature T1According to the inlet water temperature T1Determining whether the water-using equipment is shut down in comparison with the first temperature threshold; and when the water supply equipment is determined to be closed, closing a water pump of the gas water heater, and determining whether to close the gas water heater according to the water flow in the water outlet pipeline.
The invention is also characterized in that:
the first temperature threshold is T0+ N, wherein, T0The minimum water inlet temperature is N > 5.
The first temperature threshold is (T)0+ Ts)/2, wherein T0For minimum inlet water temperature, Ts is the set temperature for the water heater.
The minimum inlet water temperature T0The method comprises the steps that after a water pump of the water heater is started, the water temperature of water flowing through a water inlet pipeline is collected; when the collected water temperature is less than the minimum inlet water temperature T0Taking the water temperature as the minimum inlet water temperature T0。
According to the inlet water temperature T acquired in real time1And the comparison relation with the first temperature threshold value determines that the water using equipment is closed, and specifically comprises the following steps: when the collected inlet water temperature T1And when the temperature is larger than the first temperature threshold value, determining that the water using equipment is closed.
The method further comprises the following steps: when the collected inlet water temperature T1And when the temperature is less than or equal to the first temperature threshold value, determining that the water using equipment is in use, maintaining the starting state of the water pump, and continuing to work the gas water heater.
The method for determining whether to close the water heater according to the water flow in the water outlet pipeline specifically comprises the following steps: when the water flow is smaller than the flow threshold value, the gas water heater is turned off; and when the water flow is more than or equal to the flow threshold value, the gas water heater continues to work.
When the water flow is more than or equal to the flow threshold, the gas water heater continues to work, and then, the method further comprises the following steps: when the inlet water temperature T is collected in real time1And when the temperature is less than the second temperature threshold value, the water pump is restarted.
The second temperature threshold is T0+ M, wherein, T0M is more than 3 and is the minimum water inlet temperature.
The second temperature threshold is (T)0+ Ts)/2-2, wherein, T0And Ts is the set temperature of the gas water heater for the minimum inlet water temperature.
Compared with the prior art, the invention acquires the inlet water temperature T in real time1And after the comparison relation with the first temperature threshold value determines that the user closes the water using equipment, the water pump is closed, whether the water heater is closed or not is determined according to the water flow, and the intelligent shutdown of the gas water heater is controlled after the double judgment, so that the misjudgment is prevented.
Drawings
FIG. 1 is a flow chart of an intelligent shutdown control method for a gas water heater provided in embodiment 1 of the present invention;
FIG. 2 is a flow chart of an intelligent shutdown control method for a gas water heater according to embodiment 2 of the present invention;
fig. 3 is a schematic diagram of a gas water heater circulation pipeline in an intelligent shutdown control method for a gas water heater according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail with reference to the following embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Embodiment 1 of the present invention provides an intelligent shutdown control method for a gas water heater, as shown in fig. 3, a water outlet pipeline 2 of the gas water heater is connected with a water return pipeline 4 of the gas water heater through a first three-way valve 1 to form a circulation pipeline, a water inlet pipeline 3 of the gas water heater is connected to the circulation pipeline through a second three-way valve 5, and one or more water-using devices 6 are arranged on the water outlet pipeline 2 and the water inlet pipeline 3;
as shown in fig. 1, the method specifically comprises the following steps:
step 1, starting at least one water using device 6, starting a water pump of a gas water heater, supplying tap water to the water using device 6 through a water inlet pipeline 3, and supplying hot water heated by the gas water heater to the water using device 6 through a water outlet pipeline 2; the water temperature flowing through the water return pipeline 4, namely the inlet water temperature T, is collected in real time1When the collected inlet water temperature T1Less than the minimum inlet water temperature T0Taking the inlet water temperature as the minimum inlet water temperature T0；
Wherein the minimum inlet water temperature T0The water temperature is acquired by collecting the water temperature flowing through the water inlet pipeline 3 after the water pump of the gas water heater is started; when the collected water temperature is less than the minimum inlet water temperature T0Taking the water temperature as the minimum inlet water temperature T0；
when the water flow L is<When the water temperature is 2L/min, the gas water heater is closed; when the water is presentWhen the flow L is more than or equal to 2L/min, the gas water heater continues to work, and when the inlet water temperature T is acquired in real time1＜T0When + M, the water pump is restarted, wherein T0M is more than 3 and is the minimum water inlet temperature.
In addition, the precondition for judging whether the user shuts off the water through the embodiment is as follows: Ts-T0>N and N are more than 5, Ts is the set temperature of the gas water heater, Ts is more than or equal to 35 ℃ and less than or equal to 60 ℃, and water inlet temperature in summer is higher and possibly higher than the set temperature, so that whether the water is turned off or not by a user cannot be judged by the method of the embodiment.
In the embodiment 1 of the invention, the inlet water temperature is firstly collected, and the minimum inlet water temperature is taken as T0Then according to the inlet water temperature T1And the minimum inlet water temperature is T0The relation between the water and the water is judged whether the user turns off the water or not, and when T is reached1＞T0When the water flow rate is higher than the preset value, + N, the user is considered to be turned off, and then whether the judgment of the previous step is correct is verified through the water flow rate, so that misoperation is prevented; the intelligent shutdown of the gas water heater is controlled after double judgment, and resource waste is prevented.
An embodiment 2 of the present invention provides an intelligent shutdown control method for a gas water heater, as shown in fig. 3, a water outlet pipeline 2 of the gas water heater is connected with a water return pipeline 4 of the gas water heater through a first three-way valve 1 to form a circulation pipeline, a water inlet pipeline 3 of the gas water heater is connected to the circulation pipeline through a second three-way valve 5, and one or more water-using devices 6 are arranged on the water outlet pipeline 2 and the water inlet pipeline 3;
as shown in fig. 2, the method specifically includes the following steps:
step 1, starting at least one water using device 6, starting a water pump of a gas water heater, supplying tap water to the water using device 6 through a water inlet pipeline 3, and supplying hot water heated by the gas water heater to the water using device 6 through a water outlet pipeline 2; the water temperature flowing through the water return pipeline 4, namely the inlet water temperature T, is collected in real time1When the collected inlet water temperature T1Less than the minimum inlet water temperature T0Taking the inlet water temperature as the minimum inlet water temperature T0；
Wherein the minimum inlet water temperature T0In the gas heatThe water temperature of the water flowing through the water inlet pipeline 3 is acquired after the water pump of the water heater is started; when the collected water temperature is less than the minimum inlet water temperature T0Taking the water temperature as the minimum inlet water temperature T0；
when the water flow L is<When the water temperature is 2L/min, the gas water heater is closed; when the water flow L is more than or equal to 2L/min, the gas water heater continues to work, and when the inlet water temperature T is acquired in real time1＜(T0When + Ts)/2-2, the water pump is restarted, wherein T0The minimum water inlet temperature is N > 5.
In the embodiment 2 of the invention, the inlet water temperature is firstly collected, and the minimum inlet water temperature is taken as T0Then according to the inlet water temperature T1And the minimum inlet water temperature is T0Judging whether the user shuts off the water or not according to the relation between the temperature T and the temperature T of the water inlet1＞(T0When the water flow is + Ts)/2, the user is considered to be shut off, and then whether the judgment of the previous step is correct is verified through the water flow, so that misoperation is prevented; the embodiment timely controls the shutdown of the gas water heater after double judgment.
The embodiment of the invention is mainly applied to a zero-cold-water gas water heater, wherein the zero-cold-water gas water heater is used for starting a zero-cold-water function under the condition of no boiled water, a water pump in the gas water heater is started, after the water pump is started, hot water in a hot water pipeline flows and flows out through a water outlet pipe of the water heater, the outflow water flows back to the water heater through a water return pipeline to form a circulating pipeline, the water heater starts combustion heating after detecting a water flow signal, the water in the whole circulating pipeline can be completely heated to a set temperature after 3-5 minutes, when a user bathes, hot water exists in a shower head, and cold water cannot flow out firstly, namely zero cold water; however, the water pump in the zero-cold-water gas water heater is different from the common water pump, the common water pump also has a supercharging function while circularly preheating, and the water pump in the zero-cold-water gas water heater only has a circularly preset function, so that the supercharging function is independently added.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are also included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (9)
1. An intelligent shutdown control method for a gas water heater is characterized in that a water outlet pipeline (2) of the gas water heater is connected with a water return pipeline (4) of the gas water heater through a first three-way valve (1) to form a circulating pipeline, a water inlet pipeline (3) of the gas water heater is connected to the circulating pipeline through a second three-way valve (5), and one or more water utilization devices (6) are arranged on the water outlet pipeline (2) and the water inlet pipeline (3); the method is characterized in that at least any one water using device (6) is started, a water pump of the gas water heater is started, tap water supplies water to the water using device (6) through a water inlet pipeline (3), and hot water heated by the gas water heater supplies water to the water using device (6) through a water outlet pipeline (2); the water temperature flowing through the water return pipeline (4) is collected in real time, namely the water inlet temperature T1According to the inlet water temperature T1The comparison with the first temperature threshold value determines whether the water consumer (6) is switched off; when the water supply equipment (6) is determined to be closed, the water pump of the gas water heater is closed, and whether the gas water heater is closed or not is determined according to the condition of the water flow in the water outlet pipeline (2);
wherein the setting of the first temperature threshold depends on a minimum inlet water temperature T0The water temperature of the water flowing through the water inlet pipeline (3) is acquired by collecting the water temperature after the water pump of the gas water heater is started; when the collected water temperature is less than the minimum inlet water temperature T0Taking the water temperature as the minimum inlet water temperature T0 。
2. The intelligent shutdown control method for a gas water heater as claimed in claim 1, wherein the first temperature threshold is T0+ N, wherein, T0The minimum water inlet temperature is N > 5.
3. The intelligent shutdown control method for a gas water heater as claimed in claim 1, wherein the first temperature threshold is (T ™)0+ Ts)/2, wherein T0And Ts is the set temperature of the gas water heater for the minimum inlet water temperature.
4. The intelligent shutdown control method for gas water heater according to claim 2 or 3, characterized in that the inlet water temperature T is acquired in real time1The comparison with the first temperature threshold determines that the water consumer (6) has been switched off, in particular: when the collected inlet water temperature T1Above the first temperature threshold, it is determined that the water consumer (6) has been switched off.
5. The intelligent shutdown control method for a gas water heater as claimed in claim 4, further comprising: when the collected inlet water temperature T1And when the temperature is less than or equal to the first temperature threshold value, determining that the water using equipment (6) is in use, maintaining the starting state of the water pump, and continuing to work the gas water heater.
6. The intelligent shutdown control method for a gas water heater according to claim 5, wherein the determination of whether to shut down the gas water heater is based on the water flow in the water outlet pipeline (2), specifically: when the water flow is smaller than the flow threshold value, the gas water heater is turned off; and when the water flow is more than or equal to the flow threshold value, the gas water heater continues to work.
7. The intelligent shut-down control method for a gas water heater as claimed in claim 6, wherein said water flow is stoppedWhen volume is more than or equal to the flow threshold, the gas heater continues to work, later, still includes: when the inlet water temperature T is collected in real time1And when the temperature is less than the second temperature threshold value, the water pump is restarted.
8. The intelligent shutdown control method for a gas water heater as claimed in claim 7, wherein the second temperature threshold is T0+ M, wherein, T0M is more than 3 and is the minimum water inlet temperature.
9. The intelligent shutdown control method for a gas water heater as claimed in claim 7, wherein the second temperature threshold is (T ™)0+ Ts)/2-2, wherein, T0And Ts is the set temperature of the gas water heater for the minimum inlet water temperature.
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| CN112097401A (en) * | 2020-10-21 | 2020-12-18 | 佛山市九零物联科技有限公司 | Water heater control system with zero water pressure function and working method |
| CN112963968B (en) * | 2021-03-22 | 2022-08-16 | 华帝股份有限公司 | Control method for zero cold water pressurization of gas water heater |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200742822A (en) * | 2006-05-09 | 2007-11-16 | Sheng-Feng Wang | Storage and instantaneous dual-purpose gas-operated water heater |
| CN104596117A (en) * | 2015-01-21 | 2015-05-06 | 芜湖美的厨卫电器制造有限公司 | Low-heat value fuel gas combustion chamber of gas turbine |
| CN104697177A (en) * | 2015-02-09 | 2015-06-10 | 芜湖美的厨卫电器制造有限公司 | Water heater as well as control method and control system thereof |
| CN106091356A (en) * | 2016-07-28 | 2016-11-09 | 芜湖美的厨卫电器制造有限公司 | Gas heater |
| CN106247625A (en) * | 2016-07-29 | 2016-12-21 | 广东万和新电气股份有限公司 | Hot water circulating device and control method thereof |
| CN106322769A (en) * | 2016-08-30 | 2017-01-11 | 宁波方太厨具有限公司 | Water circulation control method of gas water heater, and gas water heater adopting water circulation control method |
| CN106440332A (en) * | 2016-10-27 | 2017-02-22 | 广东万家乐燃气具有限公司 | Gas-central water heater provided with memory alloy one-way valve |
| CN106500343A (en) * | 2016-10-13 | 2017-03-15 | 广东万家乐燃气具有限公司 | A kind of control method of central fuel gas water heating device |
| CN106610134A (en) * | 2015-10-21 | 2017-05-03 | 青岛经济技术开发区海尔热水器有限公司 | Gas water heater and control method |
| CN106940091A (en) * | 2017-04-26 | 2017-07-11 | 广东万和新电气股份有限公司 | Zero cold water gas heater system |
| CN107576055A (en) * | 2017-08-25 | 2018-01-12 | 华帝股份有限公司 | A kind of zero cold water water heater |
| CN108036498A (en) * | 2017-12-07 | 2018-05-15 | 成都前锋电子有限责任公司 | A kind of gas heater and its intelligent booster control method |
| CN108679848A (en) * | 2018-03-01 | 2018-10-19 | 万家乐热能科技有限公司 | A kind of the flow property judgment method and gas-heating water heater of hot-water supply |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105135689B (en) * | 2015-09-25 | 2018-04-06 | 广东美的暖通设备有限公司 | The antifreeze pre-warning and control method of circulation hot water dispenser and device |
| CN206191879U (en) * | 2016-10-20 | 2017-05-24 | 广东万和新电气股份有限公司 | Zero cold water gas heater and system thereof |
| CN108444094A (en) * | 2018-06-06 | 2018-08-24 | 广东万家乐燃气具有限公司 | A kind of thermostatic type central heater and control method |
-
2018
- 2018-10-26 CN CN201811259590.4A patent/CN110207388B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200742822A (en) * | 2006-05-09 | 2007-11-16 | Sheng-Feng Wang | Storage and instantaneous dual-purpose gas-operated water heater |
| CN104596117A (en) * | 2015-01-21 | 2015-05-06 | 芜湖美的厨卫电器制造有限公司 | Low-heat value fuel gas combustion chamber of gas turbine |
| CN104697177A (en) * | 2015-02-09 | 2015-06-10 | 芜湖美的厨卫电器制造有限公司 | Water heater as well as control method and control system thereof |
| CN106610134A (en) * | 2015-10-21 | 2017-05-03 | 青岛经济技术开发区海尔热水器有限公司 | Gas water heater and control method |
| CN106091356A (en) * | 2016-07-28 | 2016-11-09 | 芜湖美的厨卫电器制造有限公司 | Gas heater |
| CN106247625A (en) * | 2016-07-29 | 2016-12-21 | 广东万和新电气股份有限公司 | Hot water circulating device and control method thereof |
| CN106322769A (en) * | 2016-08-30 | 2017-01-11 | 宁波方太厨具有限公司 | Water circulation control method of gas water heater, and gas water heater adopting water circulation control method |
| CN106500343A (en) * | 2016-10-13 | 2017-03-15 | 广东万家乐燃气具有限公司 | A kind of control method of central fuel gas water heating device |
| CN106440332A (en) * | 2016-10-27 | 2017-02-22 | 广东万家乐燃气具有限公司 | Gas-central water heater provided with memory alloy one-way valve |
| CN106940091A (en) * | 2017-04-26 | 2017-07-11 | 广东万和新电气股份有限公司 | Zero cold water gas heater system |
| CN107576055A (en) * | 2017-08-25 | 2018-01-12 | 华帝股份有限公司 | A kind of zero cold water water heater |
| CN108036498A (en) * | 2017-12-07 | 2018-05-15 | 成都前锋电子有限责任公司 | A kind of gas heater and its intelligent booster control method |
| CN108679848A (en) * | 2018-03-01 | 2018-10-19 | 万家乐热能科技有限公司 | A kind of the flow property judgment method and gas-heating water heater of hot-water supply |
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|---|---|
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