CN110220314B - Gas water heater control method and gas water heater - Google Patents
Gas water heater control method and gas water heater Download PDFInfo
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- CN110220314B CN110220314B CN201910507028.7A CN201910507028A CN110220314B CN 110220314 B CN110220314 B CN 110220314B CN 201910507028 A CN201910507028 A CN 201910507028A CN 110220314 B CN110220314 B CN 110220314B
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 318
- 238000000034 method Methods 0.000 title claims abstract description 35
- 238000001514 detection method Methods 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 6
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 206010063385 Intellectualisation Diseases 0.000 abstract description 3
- 239000008236 heating water Substances 0.000 abstract description 3
- 230000006698 induction Effects 0.000 description 4
- 239000008399 tap water Substances 0.000 description 3
- 235000020679 tap water Nutrition 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 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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- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a control method of a gas water heater, which comprises the following steps: s1, starting the preheating function of the gas water heater in the standby state; s2, starting a water pump of the gas water heater; s3, detecting water flow on a main water channel of the gas water heater, and entering S4 when the water flow is larger than the preset starting water flow; otherwise, the gas water heater is kept in a standby state; s4, igniting the gas water heater to enter a preheating mode; s5, detecting the return water temperature of the gas water heater, completing preheating when the return water temperature is higher than the preset preheating temperature, and turning off the water pump; otherwise, the working state of the gas water heater is controlled through the change of the heat exchange quantity of the gas water heater; s6, when the water flow on the main water path of the gas water heater is larger than the preset shutdown water flow, the gas water heater keeps burning; otherwise, the gas water heater is shut down; the invention also discloses a gas water heater. In the preheating process, the invention can recognize the action of heating water by a user to realize quick pump switching off, reduce power consumption and embody product intellectualization.
Description
Technical Field
The invention belongs to the technical field of gas water heaters, and particularly relates to a gas water heater control method and a gas water heater.
Background
At present, zero cold water gas water heaters are becoming the trend of the water heater industry because they can realize that hot water can be used immediately after being started, and are more and more favored by consumers. When the preheating function is started, the built-in circulating pump of the gas water heater operates to drive the water stored in the external hot water pipe and the water return pipe to circularly flow and realize preheating.
The circulation preheating process of the conventional zero-cold-water gas water heater on the market is generally as follows: after the preheating function is started, the built-in water pump is started for circulating heating, and when the return water temperature reaches the program preheating temperature, the preheating mode is automatically exited. However, when the zero-cold-water heater is actually used, a user often opens the hot water faucet to use hot water in the process of starting the pump and preheating, at the moment, tap water flows into the water heater, the return water temperature cannot reach the program preheating temperature, the preheating mode cannot be automatically exited, and the water pump is started all the time and consumes excessive power.
Disclosure of Invention
In order to solve the above problems, the present invention aims to provide a control method for a gas water heater, which realizes the pump switching-off function in the preheating process by detecting the heat exchange quantity, and is suitable for household hot water supply gas rapid water heaters and dual-purpose furnaces.
Another object of the present invention is to provide a gas water heater.
The technical scheme adopted by the invention is as follows:
a control method of a gas water heater is implemented according to the following steps:
s1, starting the preheating function of the gas water heater in the standby state;
s2, starting a water pump of the gas water heater;
s3, detecting water flow on a main water channel of the gas water heater, and entering S4 when the water flow is larger than preset starting water flow; otherwise, the gas water heater is kept in a standby state;
s4, igniting the gas water heater to enter a preheating mode;
s5, detecting the return water temperature of the gas water heater, completing preheating when the return water temperature is higher than a preset preheating temperature, and turning off the water pump; otherwise, the working state of the gas water heater is controlled through the change of the heat exchange quantity of the gas water heater;
s6, when the water flow on the main water path of the gas water heater is larger than the preset shutdown water flow, the gas water heater keeps burning; otherwise, the gas water heater is shut down.
Preferably, in S5, the operating state of the gas water heater is controlled by the change of the heat exchange amount of the gas water heater, specifically:
when the heat exchange variable quantity of the gas water heater is larger than the preset heat exchange variable quantity, the gas water heater completes preheating and the water pump is closed; otherwise, the process returns to S3.
Preferably, the heat exchange variation of the gas water heater is as follows: the difference of the heat exchange quantity of the current moment and the heat exchange quantity of the last moment is that:
△Qmeasured in fact＝QMeasured in fact-QOriginal source
In the above formula, Delta QMeasured in factFor the heat exchange variation, Q, of gas water heatersMeasured in factIs the amount of heat exchange at the present moment, QOriginal sourceIs the heat exchange amount at the last moment.
Preferably, the heat exchange amount Q at the current momentMeasured in factSpecifically, the calculation is performed by the following formula:
Qmeasured in fact＝(TDischarging water-TInflow water)×VMeasured in fact
In the above formula, TDischarging waterIs the temperature of the outlet water, TInflow waterTo the temperature of the inlet water, VMeasured in factIs the water flow at the current moment on the main waterway.
Preferably, in S5, the operating state of the gas water heater is controlled by the change of the heat exchange amount of the gas water heater, specifically:
when the heat exchange change rate of the gas water heater is larger than the preset heat exchange change rate, the gas water heater completes preheating and the water pump is closed; otherwise, the process returns to S3.
Preferably, the heat exchange change rate of the gas water heater is as follows: the difference between the heat exchange amount at the current moment and the heat exchange amount at the last moment is compared with the ratio of the heat exchange amount at the last moment, namely:
△Lmeasured in fact＝(QMeasured in fact-QOriginal source)/QOriginal source
In the above formula,. DELTA.LMeasured in factIs the heat exchange change rate, Q, of a gas water heaterMeasured in factIs the amount of heat exchange at the present moment, QOriginal sourceIs the heat exchange amount at the last moment.
Preferably, in S5, the controlling the operating state of the gas water heater through the change of the heat exchange quantity of the gas water heater further includes:
when the heat exchange variation of the gas water heater is larger than the preset heat exchange variation or the heat exchange variation rate of the gas water heater is larger than the preset heat exchange variation rate, the water pump is turned off;
judging whether the water flow on the main water channel of the gas water heater is larger than the preset shutdown water flow or not, and if so, maintaining the combustion of the gas water heater; otherwise, the gas water heater is turned off and turned off, and returns to S2.
Preferably, the difference between the current moment and the previous moment is 5-15 s; the preset heat exchange variation is 3-10 (K L/min).
The utility model provides an use gas heater of above-mentioned control method, its includes water heater body, heat exchanger, rivers pipeline, rivers induction element, the temperature detecting element that intakes, water pump, controller, gas control valve and play water temperature detecting element, heat exchanger sets up at the water heater body internally, the rivers pipeline passes heat exchanger, rivers induction element and water pump all set up on the rivers pipeline, intake temperature detecting element and play water temperature detecting element set up respectively at the end of intaking and the play water end of water heater body, rivers induction element, water pump, the temperature detecting element that intakes, gas control valve and play water temperature detecting element all are connected with the controller.
Preferably, the gas water heater further comprises a display screen connected with the controller, and a preheating function key is arranged on the display screen.
Compared with the prior art, the invention can identify the action of heating water by a user to realize quick pump shutdown in the preheating process, reduce power consumption and embody product intellectualization; and the working state of the pump is controlled to be closed by monitoring the change of the heat exchange quantity, the water flow is monitored again to judge whether the boiled water is available or not, otherwise, the pump is started again to preheat, the misjudgment is avoided, and the full preheating is ensured.
Drawings
Fig. 1 is a flowchart of a control method for a gas water heater according to embodiment 1 of the present invention;
fig. 2 is a flow chart of a control method of a gas water heater provided in embodiment 2 of the present invention;
FIG. 3 is a schematic structural diagram of a gas water heater in a preheating operation state according to embodiment 3 of the present invention;
fig. 4 is a schematic structural diagram of the hot water supply device in the preheating process of the gas water heater provided by embodiment 3 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.
Example 1
Embodiment 1 of the present invention provides a method for controlling a gas water heater, which is specifically implemented according to the following steps, as shown in fig. 1:
s1, starting the preheating function of the gas water heater in the standby state;
s2, starting a water pump of the gas water heater;
s3, detecting water flow on a main water channel of the gas water heater, and entering S4 when the water flow is larger than preset starting water flow; otherwise, the gas water heater is kept in a standby state;
s4, igniting the gas water heater to enter a preheating mode;
s5, detecting the return water temperature of the gas water heater, completing preheating when the return water temperature is higher than a preset preheating temperature, and turning off the water pump; otherwise, the working state of the gas water heater is controlled through the change of the heat exchange quantity of the gas water heater;
the working state of the gas water heater is controlled through the change of the heat exchange quantity of the gas water heater, and two realization modes are provided:
the first method specifically comprises the following steps: when the heat exchange variable quantity of the gas water heater is larger than the preset heat exchange variable quantity, the gas water heater completes preheating and the water pump is closed; otherwise, returning to S3;
the heat exchange variable quantity of the gas water heater is as follows: the difference of the heat exchange quantity of the current moment and the heat exchange quantity of the last moment is that:
△Qmeasured in fact＝QMeasured in fact-QOriginal source
In the above formula, Delta QMeasured in factFor the heat exchange variation, Q, of gas water heatersMeasured in factIs the amount of heat exchange at the present moment, QOriginal sourceThe heat exchange quantity at the previous moment;
heat exchange quantity Q at presentMeasured in factSpecifically, the calculation is performed by the following formula:
Qmeasured in fact＝(TDischarging water-TInflow water)×VMeasured in fact
In the above formula, TDischarging waterIs the temperature of the outlet water, TInflow waterTo the temperature of the inlet water, VMeasured in factIs the water flow at the current moment on the main waterway.
The second method specifically comprises the following steps: when the heat exchange change rate of the gas water heater is larger than the preset heat exchange change rate, the gas water heater completes preheating and the water pump is closed; otherwise, the process returns to S3.
The heat exchange change rate of the gas water heater is as follows: the difference between the heat exchange amount at the current moment and the heat exchange amount at the last moment is compared with the ratio of the heat exchange amount at the last moment, namely:
△Lmeasured in fact＝(QMeasured in fact-QOriginal source)/QOriginal source
In the above formula,. DELTA.LMeasured in factThe heat exchange change rate of the gas water heater;
s6, when the water flow on the main water path of the gas water heater is larger than the preset shutdown water flow, the gas water heater keeps burning; otherwise, the gas water heater is shut down.
In this embodiment, the preset heat exchange variation is a fixed value or is set by a parameter setting manner of the controller, and is a positive value.
The heat exchange variation (Delta Q)Measured in fact) Equal to the difference value between the current actually measured heat exchange quantity and the heat exchange quantity at the last moment, namely delta QMeasured in fact＝QMeasured in fact-QOriginal sourceAnd the heat exchange quantity at the last moment is the heat exchange quantity measured before the unit time of the program. When Q isMeasured in fact＞QOriginal sourceTime, delta QMeasured in factIs positive, otherwise Δ QMeasured in factIs negative.
The unit time of the program is 5-15 s.
The preset heat exchange change rate is a fixed value or is set by a parameter setting mode of the controller, and is a positive value.
Rate of change of heat exchange amount (Δ L)Measured in fact) Is equal to the difference value between the current actually measured heat exchange quantity and the original heat exchange quantity divided by the original heat exchange quantity, namely delta LMeasured in fact＝(QMeasured in fact-QOriginal source)/QOriginal sourceAnd the original heat exchange amount is the heat exchange amount measured at the last moment. When Q isMeasured in fact＞QOriginal sourceTime, delta LMeasured in factIs positive, otherwise Δ LMeasured in factIs negative.
Example 2
s7, when the heat exchange variable quantity of the gas water heater is larger than the preset heat exchange variable quantity, or the heat exchange change rate of the gas water heater is larger than the preset heat exchange change rate, the water pump is closed; (ii) a
Judging whether the water flow on the main water channel of the gas water heater is larger than the preset shutdown water flow or not, and if so, maintaining the combustion of the gas water heater; otherwise, the gas water heater is turned off and turned off, and returns to S2.
Therefore, after the water pump is turned off, when the measured water flow is smaller than the water flow when the water pump is turned off, the hot water faucet is not turned on, the false operation is caused, the controller firstly turns off the gas control valve to extinguish the fire, then turns on the water pump again to continue preheating, the phenomenon that the circulating preheating process is interrupted due to the fact that a user temporarily turns on the hot water is avoided, and sufficient preheating is guaranteed.
Example 3
Embodiment 3 of the present invention provides a gas water heater, as shown in fig. 3 to 4:
it includes water heater body 1, heat exchanger 2, rivers pipeline 3, rivers induction element 4, temperature detecting element 5 of intaking, water pump 6, controller 7, gas control valve 8 and leaving water temperature detecting element 9, wherein:
the heat exchanger 2 is arranged in the water heater body 1, the water flow pipeline 3 penetrates through the heat exchanger 2, the water flow sensing unit 4 and the water pump 6 are both arranged on the water flow pipeline 3, the water inlet temperature detection unit 5 and the water outlet temperature detection unit 9 are respectively arranged at the water inlet end and the water outlet end of the water heater body 1, and the water flow sensing unit 4, the water pump 6, the water inlet temperature detection unit 5, the gas control valve 8 and the water outlet temperature detection unit 9 are all connected with the controller 7;
thus, with the structure, after the preheating function is started, the controller 7 turns on the water pump 6 for cyclic heating, and the stored water in the water return pipe flows into the hot water pipe after flowing through the water heater to be heated and then flows into the water return pipe again; in the preheating process, the controller 7 automatically adjusts the gas opening of the gas control valve 8 according to the difference between the outlet water temperature detected by the outlet water temperature detection unit 9 and the preset temperature, so as to change the combustion firepower and enable the outlet water temperature to be close to the preset temperature. The outlet water temperature is basically unchanged in the preheating process, when a user opens a hot water faucet and tap water flows into the water heater, the water flow passing through the water flow sensing unit 4 is suddenly increased, and the inlet water temperature detected by the inlet water temperature detection unit 5 is synchronously reduced; after a user starts hot water in the preheating process, the heat exchange amount of the gas water heater is increased remarkably, when the heat exchange variation of the water heater is measured to be larger than a preset heat exchange abrupt change amount or the heat exchange amount variation rate is measured to be larger than a preset heat exchange amount abrupt change rate, the controller 7 outputs a closing instruction to the water pump 6, the water pump 6 is closed, the preheating mode is quit, the common shower mode is switched to, and power consumption is reduced.
In this embodiment, in the standby state (off state) of the water heater, when the water flow sensing unit 4 detects that the water flow is larger than the preset on water flow, the controller 7 opens the gas control valve 8, and the air is combusted and heated. When the water heater is in a working state (on fire), when the water flow sensing unit 4 detects that the water flow is smaller than the shutdown water flow, the controller 7 closes the gas control valve 8, and shuts down the water heater;
in addition, the water inlet end of the water heater is connected with tap water, the water outlet end of the water heater is connected with a hot water faucet through a hot water pipe, a water return pipe is arranged on the hot water pipe and connected with the water inlet end of the water heater, and a one-way valve with the conduction direction consistent with the return water is arranged on the water return pipe.
The gas water heater further comprises a display screen 10 connected with the controller 7, and a preheating function key is arranged on the display screen 10.
The water flow sensing unit 4 in this embodiment includes a flow sensor; the inlet water temperature detection unit 5 and the outlet water temperature sensor 9 include temperature sensors.
In the preheating process, the invention can recognize the action of heating water by a user to realize quick pump switching off, reduce power consumption and embody product intellectualization; and the working state of the pump is controlled to be closed by monitoring the change of the heat exchange quantity, the water flow is monitored again to judge whether the boiled water is available or not, otherwise, the pump is started again to preheat, the misjudgment is avoided, and the full preheating is ensured.
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 (8)
1. A control method of a gas water heater is characterized by comprising the following steps:
s1, starting the preheating function of the gas water heater in the standby state;
s2, starting a water pump of the gas water heater;
s3, detecting water flow on a main water channel of the gas water heater, and entering S4 when the water flow is larger than preset starting water flow; otherwise, the gas water heater is kept in a standby state;
s4, igniting the gas water heater to enter a preheating mode;
s5, detecting the return water temperature of the gas water heater, completing preheating when the return water temperature is higher than a preset preheating temperature, and turning off the water pump; otherwise, the working state of the gas water heater is controlled through the change of the heat exchange quantity of the gas water heater;
wherein, the operating condition through the change control gas heater heat transfer volume of gas heater specifically is:
when the heat exchange variable quantity of the gas water heater is larger than the preset heat exchange variable quantity, the gas water heater completes preheating and the water pump is closed; otherwise, returning to S3;
or when the heat exchange change rate of the gas water heater is greater than the preset heat exchange change rate, the gas water heater completes preheating and the water pump is closed; otherwise, returning to S3;
s6, when the water flow on the main water path of the gas water heater is larger than the preset shutdown water flow, the gas water heater keeps burning; otherwise, the gas water heater is shut down.
2. The gas water heater control method according to claim 1, wherein the heat exchange variation of the gas water heater is: the difference of the heat exchange quantity of the current moment and the heat exchange quantity of the last moment is that:
△Qmeasured in fact＝QMeasured in fact-QOriginal source
In the above formula, Delta QMeasured in factFor the heat exchange variation, Q, of gas water heatersMeasured in factIs the amount of heat exchange at the present moment, QOriginal sourceIs the heat exchange amount at the last moment.
3. The gas water heater control method according to claim 2, wherein the heat exchange amount Q at the current time isMeasured in factSpecifically, the calculation is performed by the following formula:
Qmeasured in fact＝(TDischarging water-TInflow water)×VMeasured in fact
In the above formula, TDischarging waterIs the temperature of the outlet water, TInflow waterTo the temperature of the inlet water, VMeasured in factIs the water flow at the current moment on the main waterway.
4. The gas water heater control method according to claim 1, wherein the heat exchange change rate of the gas water heater is: the difference between the heat exchange amount at the current moment and the heat exchange amount at the last moment is compared with the ratio of the heat exchange amount at the last moment, namely:
△Lmeasured in fact＝(QMeasured in fact-QOriginal source)/QOriginal source
In the above formula,. DELTA.LMeasured in factIs the heat exchange change rate, Q, of a gas water heaterMeasured in factIs the amount of heat exchange at the present moment, QOriginal sourceIs the heat exchange amount at the last moment.
5. The gas water heater control method according to claim 2 or 4, wherein the controlling the operating state of the gas water heater through the change of the heat exchange amount of the gas water heater in the S5 further comprises:
when the heat exchange variation of the gas water heater is larger than the preset heat exchange variation or the heat exchange variation rate of the gas water heater is larger than the preset heat exchange variation rate, the water pump is turned off;
judging whether the water flow on the main water channel of the gas water heater is larger than the preset shutdown water flow or not, and if so, maintaining the combustion of the gas water heater; otherwise, the gas water heater is turned off and turned off, and returns to S2.
6. The control method of the gas water heater according to claim 4, wherein the difference between the current time and the previous time is 5-15 s; the preset heat exchange variation is 3-10 (K L/min).
7. The gas water heater applying the control method according to any one of claims 1 to 6, characterized by comprising a water heater body (1), a heat exchanger (2), a water flow pipeline (3), a water flow sensing unit (4), an inlet water temperature detection unit (5), a water pump (6), a controller (7), a gas control valve (8) and an outlet water temperature detection unit (9), wherein the heat exchanger (2) is arranged in the water heater body (1), the water flow pipeline (3) penetrates through the heat exchanger (2), the water flow sensing unit (4) and the water pump (6) are both arranged on the water flow pipeline (3), the inlet water temperature detection unit (5) and the outlet water temperature detection unit (9) are respectively arranged at the inlet end and the outlet end of the water heater body (1), and the water flow sensing unit (4), the water pump (6) and the outlet water temperature detection unit (9) are respectively arranged at the inlet end and the, The water inlet temperature detection unit (5), the gas control valve (8) and the water outlet temperature detection unit (9) are all connected with the controller (7).
8. A gas water heater according to claim 7, further comprising a display screen (10) connected to the controller (7), wherein the display screen (10) is provided with a preheating function key.
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| CN110657583B (en) * | 2019-09-16 | 2021-12-10 | 广东万家乐燃气具有限公司 | Water temperature control method and device |
| CN110806013A (en) * | 2019-11-08 | 2020-02-18 | 华帝股份有限公司 | Control method of zero-cold-water gas water heater and zero-cold-water gas water heater |
| CN111351228A (en) * | 2020-02-21 | 2020-06-30 | 华帝股份有限公司 | Wall-mounted furnace and control method for rapid temperature rise of wall-mounted furnace |
| CN111609560B (en) * | 2020-04-20 | 2022-05-31 | 芜湖美的厨卫电器制造有限公司 | Control method of gas water heater, gas water heater and computer readable storage medium |
| CN115200226B (en) * | 2022-08-26 | 2023-09-15 | 杭州老板电器股份有限公司 | Preheating control method and device for gas heating equipment and gas heating equipment |
| CN116642272B (en) * | 2023-07-24 | 2023-11-24 | 杭州老板电器股份有限公司 | Control method of gas water heating system and gas water heating system |
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