CN112963968A - Control method for zero cold water pressurization of gas water heater - Google Patents
Control method for zero cold water pressurization of gas water heater Download PDFInfo
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- CN112963968A CN112963968A CN202110299943.9A CN202110299943A CN112963968A CN 112963968 A CN112963968 A CN 112963968A CN 202110299943 A CN202110299943 A CN 202110299943A CN 112963968 A CN112963968 A CN 112963968A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 259
- 238000000034 method Methods 0.000 title claims abstract description 17
- 238000012544 monitoring process Methods 0.000 abstract description 2
- 239000000523 sample Substances 0.000 description 3
- 238000003287 bathing Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000008399 tap water Substances 0.000 description 1
- 235000020679 tap water Nutrition 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)
- Control Of Positive-Displacement Pumps (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention discloses a control method for zero cold water pressurization of a gas water heater, which realizes quick pump closing action and saves gas power consumption by monitoring the temperature rise of inlet water after water is closed under a pressurization mode with a return water circulation pipeline.
Description
Technical Field
The invention relates to the technical field of water heaters, in particular to a control method for zero cold water pressurization of a gas water heater.
Background
At present, the zero-cold-water gas water heater becomes a trend of the water heater industry because the zero-cold-water gas water heater can realize that hot water can be used immediately after being started, but most zero-cold-water gas water heaters on the market do not have a water quantity pressurization function, and the specific reasons are as follows:
1. pump-on conditions: after the pressurization function is started, when the water flow detected by the water flow sensing device of the water heater is larger than the pump-on water flow (generally 2.5L/min), the water pump is started for pressurization. And (3) pump-off conditions: in the boost mode of operation, when the measured water flow rate is less than the pump-off water flow rate (typically 2.0L/min), the water pump is turned off and shut down.
2. The zero-cold water heater needs to be provided with an external water return pipeline, and when the preheating function is started, the built-in circulating pump operates to drive the stored water of the hot water pipe and the water return pipe to circularly flow and realize preheating.
3. Under the condition of having a backwater circulation pipeline, the pressure boosting function is started, and under the suction effect of the built-in water pump, part of hot water flows back to the water inlet end of the water heater through the backwater pipe. When a user closes the hot water faucet, the stored water in the pipeline circularly flows under the action of the water pump, the phenomenon that the circulating flow (generally 3.5-5L/min) is higher than the shutdown flow of the water heater can exist, the stored water is continuously heated, the pump is shut down until the outlet water temperature reaches the high-temperature protection temperature (about 75 ℃), and a large amount of gas and electric power are wasted; when the user reopens the hot water faucet, the temperature of the discharged water is too hot, which is very easy to cause scalding accidents.
Disclosure of Invention
The invention aims to solve at least one of the problems in the prior related art to a certain extent, and therefore the invention provides a control method for zero cold water pressurization of a gas water heater.
The above purpose is realized by the following technical scheme:
a control method for zero cold water pressurization of a gas water heater comprises the following steps:
starting a boosting function to enter a boosting standby mode;
starting up and igniting until the current water flow is larger than the preset starting-up water flow, starting up the water pump to perform supercharging work, and recording the temperature of inlet water of the pump;
judging whether the current water flow is smaller than the preset shutdown water flow, and determining to shut down the water pump according to a judgment result, or comparing a difference value between the water inlet temperature and the water inlet temperature of the startup pump with a pump shutdown temperature rise value;
and comparing the difference value between the water inlet temperature and the water inlet temperature of the pump on with the pump off temperature rise value, and determining to maintain the pressurization mode to continue operating or close the water pump according to the comparison result.
In some embodiments, the pump-off temperature rise value and the pump-on intake water temperature value have an inversely proportional linear relationship.
In some embodiments, the pump-off temperature rise value is obtained by the following calculation formula:
judging whether the pump-on water inlet temperature is less than or equal to a first preset pump-on water inlet temperature value or not;
if so, then Δ TShut off the pump＝△TShut off pump max-(△TShut off pump max-△TShut off pump min)*TEnter and open/TAdvance to open maxWherein Δ TShut off the pumpFor the pump-off temperature rise value, Delta TShut off pump maxFor the first preset pump-off temperature rise value,. DELTA.TShut off pump minFor a second preset pump-off temperature rise value, TEnter and openFor the pump-on intake temperature value, TAdvance to open maxSetting a first preset pump-on water inlet temperature value;
if not, then delta TShut off the pump＝△TShut off pump minWherein Δ TShut off the pumpFor the pump-off temperature rise value, Delta TShut off pump minIs the second preset pump-off temperature rise value.
In some embodiments, the determining whether the current water flow is smaller than a preset shutdown water flow, and determining to shut down the water pump according to the determination result, or comparing a difference between the water inlet temperature and the pump-on water inlet temperature with a pump-off temperature rise value includes:
judging whether the current water flow is smaller than the preset shutdown water flow or not;
if yes, the water pump is turned off, and the booster standby mode is returned after the water pump is turned off and flamed out;
if not, comparing the difference value between the inlet water temperature and the inlet water temperature of the pump with the temperature rise value of the pump.
In some embodiments, the step of comparing the difference between the inlet water temperature and the inlet water temperature with the pump-off temperature rise value and determining to maintain the boost mode or to shut down the water pump according to the comparison result comprises:
judging whether the difference value between the water inlet temperature and the water inlet temperature of the pump is greater than the pump-off temperature rise value or not;
if yes, the water pump is closed;
if not, the pressurization mode is maintained to continue running, and the current water flow is judged again whether to be smaller than the preset shutdown water flow.
In some embodiments, the step of turning off the water pump comprises:
after the water pump is turned off, judging whether the current water flow is smaller than the preset shutdown water flow again;
if yes, the system returns to a pressurization standby mode after shutdown and flameout;
if not, the water pump is restarted and the pressurization mode is recovered to continue running.
In some embodiments, the step of turning on the water pump comprises:
after the water pump is restarted;
and maintaining the pressurization mode to continue running, and returning to judge whether the current water flow is smaller than the preset shutdown water flow again.
Compared with the prior art, the invention at least comprises the following beneficial effects:
1. the control method for zero cold water pressurization of the gas water heater is simple and feasible, and the water closing action of a user is identified according to the temperature rise of inlet water, so that the pressurization water closing and the quick pump stopping action are realized, and the water temperature is prevented from being excessively hot when water is reused.
2. The pump temperature rise is closed in the pressure boost according to the temperature rise self-adaptation of intaking, realizes intelligent discernment to satisfy the different temperature requirements of four seasons.
Drawings
FIG. 1 is a schematic flow chart of a zero cold water pressurization control method for a gas water heater according to an embodiment of the invention;
FIG. 2 is a graph of the temperature rise of the pump off versus the temperature of the pump on inlet water in an embodiment of the present invention.
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.
The first embodiment is as follows:
as shown in fig. 1 and 2, in the zero-cold-water pressurization control method for a gas water heater provided in the present embodiment, in the pressurization mode with a return water circulation pipeline, a rapid pump shutdown action is realized by monitoring the temperature rise of the intake water after water is shut off, so as to save the power consumption of gas.
In this embodiment, the gas water heater comprises a water heater body, a water pump, a water flow sensing device, a water inlet temperature probe, a gas control valve, an operation display and a controller, wherein the water pump and the water flow sensing device are installed on a main water path in the water heater body, the water flow sensing device monitors the water flow flowing through the water heater in real time, the water inlet temperature probe is installed at the water inlet end of the main water path of the water heater body to monitor the water inlet temperature or the water return temperature of tap water in real time, the gas control valve is installed on a gas path of the water heater body and can control the on-off of the gas path, the operation display is provided with a preheating key for starting a preheating circulation function and a boosting key for starting a boosting function, the water pump, the water flow sensing device, the water inlet temperature probe, the gas control valve and the operation display are respectively and electrically connected with the controller, after the boosting, the controller identifies the water closing action of a user according to the water inlet temperature rise, and realizes the quick pump stopping of pressurization water closing. In addition, the preheating key and the pressurizing key of the operation display can be integrally arranged.
The control method for zero cold water pressurization of the gas water heater in the embodiment comprises the following steps:
in step S101, the supercharging function is activated to enter a supercharging standby mode.
In this embodiment, after the gas water heater is turned on according to a work instruction issued by a user, the pressurization function of the gas water heater is started so that the gas water heater enters a pressurization standby mode.
And S102, starting up and igniting until the current water flow is larger than the preset starting-up water flow, simultaneously starting up the water pump to carry out supercharging work, and recording the inlet water temperature of the starting-up pump.
In the embodiment, a water flow sensing device is started to detect the water flow flowing through the water heater, if the current water flow is larger than the preset starting water flow, a gas control valve is started to start the water heater for ignition, after ignition and heating, a water pump is started to perform pressurization work, and the water inlet temperature of the water heater is recorded; and if the current water flow is less than or equal to the preset starting-up water flow, returning to the pressurization standby mode. In this embodiment, the preset flow rate of the startup water is preferably set to 2.5L/min, but is not limited to the above value, and may be set to other more suitable values according to actual requirements.
Step S103, judging whether the current water flow is smaller than the preset shutdown water flow or not;
if yes, the water pump is turned off, and the booster standby mode is returned after the water pump is turned off and flamed out;
if not, comparing the difference between the inlet water temperature and the inlet water temperature of the pump with the temperature rise value of the pump.
In this embodiment, if the current water flow is smaller than the preset shutdown water flow, the controller closes the gas control valve, shuts down the gas control valve, closes the water pump, and then returns to the pressurization standby mode.
Step S104, judging whether the difference value between the water inlet temperature and the water inlet temperature of the pump starting is greater than the pump closing temperature rise value or not;
if yes, the water pump is closed;
if not, the pressurization mode is maintained to continue running, and the current water flow is judged again whether to be smaller than the preset shutdown water flow.
Step S114, after the water pump is turned off, judging whether the current water flow is smaller than the preset shutdown water flow again;
if yes, the system returns to a pressurization standby mode after shutdown and flameout;
if not, the water pump is restarted and the supercharging mode is recovered for continuous operation.
Step S124, after the water pump is restarted;
and maintaining the pressurization mode to continue running, and returning to judge whether the current water flow is smaller than the preset shutdown water flow again.
In this embodiment, when the difference between the water inlet temperature and the pump-on water inlet temperature is greater than the pump-off temperature rise value, that is, when the water inlet temperature rise is greater than the pump-off temperature rise value, the controller turns off the water pump, and after the pump is turned off, determines whether the water flow is less than a preset shutdown water flow, if so, the controller turns off the gas control valve to shut down the gas control valve and return to the pressurization standby mode, if not, the water pump is turned on again, the pressurization mode is resumed to continue the operation, and then the step S103 is returned again to continuously determine whether the current water.
In this embodiment, an inverse proportional linear relationship exists between the pump-off temperature rise value and the pump-on water inlet temperature value, and the pump-off temperature rise in the supercharging operation mode is automatically matched by the pump-on water inlet temperature, specifically, the pump-off temperature rise value is obtained by the following calculation formula:
judging whether the pump-on water inlet temperature is less than or equal to a first preset pump-on water inlet temperature value or not;
if so, then Δ TShut off the pump＝△TShut off pump max-(△TShut off pump max-△TShut off pump min)*TEnter and open/TAdvance to open maxWherein Δ TShut off the pumpFor the pump-off temperature rise value, Delta TShut off pump maxFor the first preset pump-off temperature rise value,. DELTA.TShut off pump minFor a second preset pump-off temperature rise value, TEnter and openFor the pump-on intake temperature value, TAdvance to open maxSetting a first preset pump-on water inlet temperature value;
if not, the user can not select the specific application,then Δ TShut off the pump＝△TShut off pump minWherein Δ TShut off the pumpFor the pump-off temperature rise value, Delta TShut off pump minIs the second preset pump-off temperature rise value.
In the present embodiment, the temperature value T of the water inlet is set to be the second preset pump-on temperature value TIn advance to open minPreferably set to 0 ℃, that is, the minimum value of the preset on-off water inlet temperature value is set to 0 ℃, then the corresponding first preset pump-off temperature rise value Delta T is setShut off pump maxThe temperature is set to 10 ℃ to 20 ℃, namely the maximum value of the preset pump-off temperature rise is set to 10 ℃ to 20 ℃, and the water inlet temperature value T is set due to the first preset pump-on water temperature valueAdvance to open maxPreferably, the temperature is set to 35 ℃, that is, the maximum value of the preset on-off water inlet temperature value is set to 35 ℃, and then the corresponding first preset pump-off temperature rise value Delta T is setShut off pump maxThen set to 2 deg.C to 5 deg.C, i.e. the maximum value of the preset pump-off temperature rise is set to 2 deg.C to 5 deg.C, and furthermore, the first preset pump-on water inlet temperature value TAdvance to open maxSecond preset pump-off temperature rise value delta TShut off pump minAnd a first preset pump-off temperature rise value delta TShut off pump maxRespectively, are fixed values or are preset by the parameter setting mode of the controller.
In the embodiment, the pump-off temperature rise of the supercharging mode is inversely proportional to the pump-on inlet water temperature, namely the pump-on inlet water temperature is higher, and the pump-off temperature rise is lower, so that the requirements of different water temperatures in four seasons are met by realizing intelligent identification. In summer, the temperature of the inlet water is high, so that the bathing temperature set by a user is relatively high, the temperature rise of the return water can be quickly identified after the water is pressurized and shut down by matching with the small temperature rise of the shut-down pump, then the pump is stopped, and the water storage temperature of the return water pipe cannot be excessively heated; in winter, the water inlet temperature is low, so that the bathing temperature set by a user is relatively high, the water can be quickly identified to return water for heating up when the water is pressurized and the pump is stopped by matching with the large pump-off temperature rise, so that unnecessary gas and electricity consumption can be reduced, and the phenomenon that the water temperature is too hot when the water is reused can be avoided.
What has been described above are merely some embodiments of the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made without departing from the inventive concept thereof, and these changes and modifications can be made without departing from the spirit and scope of the invention.
Claims (7)
1. A control method for zero cold water pressurization of a gas water heater is characterized by comprising the following steps:
starting a boosting function to enter a boosting standby mode;
starting up and igniting until the current water flow is larger than the preset starting-up water flow, starting up the water pump to perform supercharging work, and recording the temperature of inlet water of the pump;
judging whether the current water flow is smaller than the preset shutdown water flow, and determining to shut down the water pump according to a judgment result, or comparing a difference value between the water inlet temperature and the water inlet temperature of the startup pump with a pump shutdown temperature rise value;
and comparing the difference value between the water inlet temperature and the water inlet temperature of the pump on with the pump off temperature rise value, and determining to maintain the pressurization mode to continue operating or close the water pump according to the comparison result.
2. The method as claimed in claim 1, wherein the pump-off temperature rise value and the pump-on water inlet temperature value have an inverse proportional linear relationship.
3. The method for controlling zero cold water pressurization of a gas water heater according to claim 1 or 2, wherein the pump-off temperature rise value is obtained by the following calculation formula:
judging whether the pump-on water inlet temperature is less than or equal to a first preset pump-on water inlet temperature value or not;
if so, then Δ TShut off the pump＝△TShut off pump max-(△TShut off pump max-△TShut off pump min)*TEnter and open/TAdvance to open maxWherein Δ TShut off the pumpFor the pump-off temperature rise value, Delta TShut off pump maxFor the first preset pump-off temperature rise value,. DELTA.TShut off pump minFor a second preset pump-off temperature rise value, TEnter and openFor the pump-on intake temperature value, TAdvance to open maxSetting a first preset pump-on water inlet temperature value;
if not, then delta TShut off the pump＝△TShut off pump minWherein Δ TShut off the pumpFor the pump-off temperature rise value, Delta TShut off pump minIs the second preset pump-off temperature rise value.
4. The method as claimed in claim 1, wherein the step of determining whether the current water flow is smaller than a preset shutdown water flow, and determining to shut down the water pump according to the determination result, or comparing the difference between the inlet water temperature and the inlet water temperature to the shutdown water temperature with the shutdown water temperature rise value comprises:
judging whether the current water flow is smaller than the preset shutdown water flow or not;
if yes, the water pump is turned off, and the booster standby mode is returned after the water pump is turned off and flamed out;
if not, comparing the difference value between the inlet water temperature and the inlet water temperature of the pump with the temperature rise value of the pump.
5. The method of claim 1, wherein the step of comparing the difference between the inlet water temperature and the inlet water temperature with a pump-off temperature rise value and determining whether to continue operating in the boost mode or to turn off the water pump according to the comparison comprises:
judging whether the difference value between the water inlet temperature and the water inlet temperature of the pump is greater than the pump-off temperature rise value or not;
if yes, the water pump is closed;
if not, the pressurization mode is maintained to continue running, and the current water flow is judged again whether to be smaller than the preset shutdown water flow.
6. The method as claimed in claim 5, wherein the step of turning off the water pump comprises:
after the water pump is turned off, judging whether the current water flow is smaller than the preset shutdown water flow again;
if yes, the system returns to a pressurization standby mode after shutdown and flameout;
if not, the water pump is restarted and the pressurization mode is recovered to continue running.
7. The method as claimed in claim 5, wherein the step of restarting the water pump comprises:
after the water pump is restarted;
and maintaining the pressurization mode to continue running, and returning to judge whether the current water flow is smaller than the preset shutdown water flow again.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113865111A (en) * | 2021-10-27 | 2021-12-31 | 华帝股份有限公司 | Control method for pressurization function of gas water heater |
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| CN110411033A (en) * | 2019-07-19 | 2019-11-05 | 樱花卫厨（中国）股份有限公司 | Control method and control system for pressurization cycle formula gas heater |
| CN111912119A (en) * | 2020-08-10 | 2020-11-10 | 华帝股份有限公司 | Control method for pressurization function of gas water heater and gas water heater |
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| JP2001336676A (en) * | 2000-05-25 | 2001-12-07 | Sadao Yamamoto | Piping joint adhered closely to plane for sealing, and bath boiler cleaning system |
| CN110207389A (en) * | 2018-10-26 | 2019-09-06 | 华帝股份有限公司 | Control method for pressurization function of gas water heater |
| CN110207388A (en) * | 2018-10-26 | 2019-09-06 | 华帝股份有限公司 | Intelligent shutdown control method for gas water heater |
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