CN106052143A - Water heater system and preheating control method thereof - Google Patents
Water heater system and preheating control method thereof Download PDFInfo
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- CN106052143A CN106052143A CN201610564621.1A CN201610564621A CN106052143A CN 106052143 A CN106052143 A CN 106052143A CN 201610564621 A CN201610564621 A CN 201610564621A CN 106052143 A CN106052143 A CN 106052143A
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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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- 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
- F24H9/0005—Details for water heaters
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- Thermal Sciences (AREA)
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- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)
Abstract
The invention discloses a water heater system and a preheating control method thereof. The preheating control method comprises the following steps of (1) detecting the return water temperature of a water inlet end of a water heater when the water heater enables a preheating function for the first time; (2) controlling the water heater to stop performing preheating when the return water temperature of the water inlet end reaches a first preset temperature and obtaining the first preheating time; (3) calculating the circulating preheating time of the water heater according to the first preheating time; and (4) controlling the water heater to perform preheating circularly according to the circulating preheating time of the water heater when the water heater enables the preheating function again. According to the method provided by the invention, suitable preheating time can be obtained automatically and the water heater can be controlled to perform preheating according to the obtained preheating time conveniently and rapidly, so that the waiting time of preheating can be reduced, and not only that but the waste of hot water can be avoided and the user experience can be greatly improved.
Description
Technical field
The present invention relates to technical field of water heaters, particularly to preheating control method and the one heat of a kind of water-heater system
Water heater system.
Background technology
Water heater on market, such as gas heater etc., can be with circulation preheating function, it is possible to the water in circulation line
Preheat, open valve during to reaching with water and obtain the purpose of hot water.
At present, the preheating of fixing time a few minutes can be set or backwater reaches setting value and completes preheating.But in the process of use
In due to the difference in the environment of user family, water route etc., required circulation all differs preheating time.If mistake preheating time
Short, then can increase the waiting time of user；If preheating time is longer or backwater reaches setting value and completes preheating, it is unnecessary to cause
The hot water of preheating enters circulation line, causes the waste of hot water.The preheating time of Related product is predetermined value in a program,
Needing to enter program setting could revise, this is undoubtedly the most convenient.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in above-mentioned technology.To this end, the present invention
One purpose is to propose the preheating control method of a kind of water-heater system, it is possible to automatically obtain suitable preheating time, and energy
Enough the most conveniently and efficiently according to acquired preheating time water heater being carried out warm-up control, thus pre-hot standby can not only be reduced
Time, additionally it is possible to avoid the waste of hot water, substantially increase Consumer's Experience.
Second object of the present invention is to propose a kind of water-heater system.
For reaching above-mentioned purpose, first aspect present invention embodiment proposes the warm-up control side of a kind of water-heater system
Method, wherein, described water-heater system includes tap water pipe line, hot water line, H valve and water heater, wherein, the first of described H valve
Entrance is connected to described tap water pipe line, and the second entrance of described H valve is connected to described hot water line, and described water heater is in preheating
When function is opened, control the water of described water heater preheating at described hot water line, described H valve, described tap water pipe line and described
The loop of water heater composition is circulated, to be circulated preheating, said method comprising the steps of: open first at described water heater
When opening described preheating function, detect the return water temperature of the water inlet end of described water heater；When the return water temperature of described water inlet end reaches
During the first preset temperature, control described water heater and stop preheating, and obtain the preheating time first of described water heater；According to described
Calculate the circulation preheating time of described water heater first preheating time；When described water heater is again turned on described preheating function,
The circulation described water heater of control preheating time according to described water heater is circulated preheating.
The preheating control method of water-heater system according to embodiments of the present invention, opens preheating function first at water heater
Time, obtain the preheating time first of water heater according to the return water temperature of the water inlet end of water heater, and count according to preheating time first
Calculate the circulation preheating time of water heater, when water heater is again turned on preheating function, according to circulation control preheating time of water heater
Heat water producer is circulated preheating.Thereby, it is possible to automatically obtain suitable preheating time, and can be conveniently and efficiently according to being obtained
The preheating time taken carries out warm-up control to water heater, thus can not only reduce the time of pre-hot standby, additionally it is possible to avoid heat
The waste of water, substantially increases Consumer's Experience.
It addition, can also have as follows according to the preheating control method of the water-heater system of the above embodiment of the present invention proposition
Additional technical characteristic:
Further, when calculating circulation preheating time of described water heater, compensate the time pair always according to default circulation
The circulation of described water heater is modified preheating time.
Further, according to the circulation preheating time of the below equation described water heater of calculating:
T=T1/2+T0
Wherein, T is the circulation preheating time of described water heater, and T1 is described preheating time first, and T0 is described default
The circulation compensation time.
Specifically, described T0 is the 15-25 second.
According to one embodiment of present invention, described water heater is gas heater.
For reaching above-mentioned purpose, second aspect present invention embodiment proposes a kind of water-heater system, and this system includes: from
Come water lines and hot water line；H valve, the first entrance of described H valve is connected to described tap water pipe line, and the second of described H valve enters
Mouth is connected to described hot water line；Water heater, described water heater, when preheating function and opening, controls the water of described water heater preheating
The loop of described hot water line, described H valve, described tap water pipe line and described water heater composition is circulated；Temperature detector,
Described temperature detector, for when described preheating function opened first by described water heater, detects the water inlet end of described water heater
Return water temperature；Controller, described controller, for when the return water temperature of described water inlet end reaches the first preset temperature, controls institute
State water heater to stop preheating, and obtain the preheating time first of described water heater, and calculate institute according to described preheating time first
State the circulation preheating time of water heater, and when described water heater is again turned on described preheating function, according to described water heater
Circulation preheating time control described water heater and be circulated preheating.
Water-heater system according to embodiments of the present invention, when preheating function opened first by water heater, controller can basis
The return water temperature of the water inlet end of water heater obtains the preheating time first of water heater, and according to calculating water heater preheating time first
Circulation preheating time, when water heater is again turned on preheating function, hot water can be controlled preheating time according to the circulation of water heater
Device is circulated preheating.Thereby, it is possible to automatically obtain suitable preheating time, and can be conveniently and efficiently according to acquired pre-
The heat time carries out warm-up control to water heater, thus can not only reduce the time of pre-hot standby, additionally it is possible to avoid the wave of hot water
Take, substantially increase Consumer's Experience.
It addition, it is special to have following additional technology according to the water-heater system of the above embodiment of the present invention proposition
Levy:
Further, described controller is when calculating circulation preheating time of described water heater, always according to default circulation
The circulation of described water heater is modified preheating time by the compensation time.
Further, described controller is according to the circulation preheating time of the below equation described water heater of calculating:
T=T1/2+T0
Wherein, T is the circulation preheating time of described water heater, and T1 is described preheating time first, and T0 is described default
The circulation compensation time.
Specifically, described T0 is the 15-25 second.
According to one embodiment of present invention, described water heater is gas heater.
Accompanying drawing explanation
Fig. 1 is the flow chart of the preheating control method of the water-heater system according to the embodiment of the present invention；
Fig. 2 is the structural representation of the water-heater system according to the embodiment of the present invention.
Reference:
10-tap water pipe line, 20-hot water line, 30-H valve, 40-water heater, 50-temperature detector, 60-controller.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most from start to finish
Same or similar label represents same or similar element or has the element of same or like function.Below with reference to attached
The embodiment that figure describes is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
Water-heater system and the preheating control method thereof of the embodiment of the present invention are described below in conjunction with the accompanying drawings.
Fig. 1 is the flow chart of the preheating control method of the water-heater system according to the embodiment of the present invention.
It should be noted that as in figure 2 it is shown, the water-heater system of the embodiment of the present invention, it may include tap water pipe line, hot water
Pipeline, H valve and water heater, wherein, the first entrance a of H valve is connected to tap water pipe line, and the second entrance b of H valve is connected to hot water
Pipeline.Water heater can be gas heater, and water heater, when preheating function and opening, can be opened heating devices heat and enter from the beginning
Water, and open built-in water pump, make the water after heating flow into hot water line.Owing to water mixing valve is not opened, flow into hot water line's
Water can flow into tap water pipe line by H valve further.Thus, the water of controlled heat water producer preheating is at hot water line, H valve, from the beginning
The loop of water lines and water heater composition is circulated, to be circulated preheating.
As it is shown in figure 1, the preheating control method of the water-heater system of the embodiment of the present invention comprises the following steps:
S1, when preheating function opened first by water heater, the return water temperature of the water inlet end of detection water heater.
Water heater is connected with tap water pipe line by water inlet end, by the return water temperature of the water inlet end of detection water heater, energy
When the enough water judged after heating arrives the water inlet end of water heater.
S2, when the return water temperature of water inlet end reaches the first preset temperature, controls water heater and stops preheating, and obtain hot water
The preheating time first of device.
When the return water temperature of water inlet end reaches the first preset temperature set, can determine whether that the water after heating arrives water heater
Water inlet end, the most controlled heat water producer stop preheating, and obtain open first from water heater water heater stop preheating time
Between, the preheating time first of hot water device.
S3, according to the circulation preheating time calculating water heater first preheating time.
Wherein, when circulation can open the water mixing valve of use water end (W.E.) preheating time with user, be able to obtain hot water at gondola water faucet is
Standard.It is to say, when water heater is again turned on preheating function, if the time that water heater carries out preheating is pre-less than this circulation
The heat time, then, when user opens the water mixing valve with water end (W.E.), the water at gondola water faucet is still cold water；If water heater carries out the time preheated
Higher than this circulation preheating time, then have unnecessary water and enter tap water pipe line.
Should be appreciated that the current superheated water pipeline after substantially can including heating first preheating time and tap water pipe line institute warp
The time gone through, therefore, the current superheated water pipelines institute warp after heating can be obtained according to the length of hot water line and tap water pipe line
The time gone through.
Water owing to first heating has temperature drop in pipeline, when calculating circulation preheating time of water heater, and also can be according in advance
If circulation the compensation time circulation of water heater is modified preheating time such that it is able to carry the comfortable of high water usage further
Property.The time that current superheated water pipeline after heating is experienced can be used as water heater with the circulation compensation time sum preset
Circulate preheating time.In one embodiment of the invention, the length of hot water line and tap water pipe line is basically identical, therefore adds
The half of the preheating time first time that the current superheated water pipeline after heat is experienced.It is to say, the present invention's
In one embodiment, can be according to the circulation preheating time of below equation calculating water heater:
T=T1/2+T0
Wherein, T is the circulation preheating time of water heater, and T1 is preheating time first, and T0 is that default circulation compensates the time.
In one particular embodiment of the present invention, it can be the 15-25 second that the circulation preset compensates time T0.
In other embodiments of the invention, also can be when preheating function be opened first by water heater, the temperature of detection water end (W.E.)
Degree, by sending to water heater by the temperature of water end (W.E.) so that when reaching default temperature by the temperature of water end (W.E.), controls hot water
Device stops preheating such that it is able to directly experienced as the current superheated water pipeline after heating the preheating time first of water heater
Time.
S4, when water heater is again turned on preheating function, controls water heater according to the circulation of water heater and carries out preheating time
Circulation preheating.
When water heater is again turned on preheating function, heater and water pump can be opened simultaneously, and circulating preheating time
Rear closedown heater and water pump, so that hot water reaches to use water end (W.E.) just.
The preheating control method of water-heater system according to embodiments of the present invention, opens preheating function first at water heater
Time, obtain the preheating time first of water heater according to the return water temperature of the water inlet end of water heater, and count according to preheating time first
Calculate the circulation preheating time of water heater, when water heater is again turned on preheating function, according to circulation control preheating time of water heater
Heat water producer is circulated preheating.Thereby, it is possible to automatically obtain suitable preheating time, and can be conveniently and efficiently according to being obtained
The preheating time taken carries out warm-up control to water heater, thus can not only reduce the time of pre-hot standby, additionally it is possible to avoid heat
The waste of water, substantially increases Consumer's Experience.
The preheating control method of the water-heater system of corresponding above-described embodiment, the present invention also proposes a kind of water-heater system.
With reference to Fig. 2, the water-heater system of the embodiment of the present invention, including: tap water pipe line 10, hot water line 20, H valve 30,
Water heater 40, temperature detector 50 and controller 60.
Wherein, the first entrance a of H valve 30 is connected to tap water pipe line 10, and the second entrance b of H valve 30 is connected to hot-water line
Road 20.
Water heater 40 can be gas heater, and water heater 40, when preheating function and opening, can open built-in heater
The tap water that heating enters, and open built-in water pump, make the water after heating flow into hot water line.Owing to water mixing valve is not opened,
The water flowing into hot water line can flow into tap water pipe line by H valve further.Thus, the water of controlled heat water producer 40 preheating is in warm
The loop of water lines 20, H valve 30, tap water pipe line 10 and water heater 40 composition is circulated.
Temperature detector 50 is for when preheating function opened first by water heater 40, detecting the backwater of the water inlet end of water heater
Temperature.
Water heater 40 is connected with tap water pipe line 10 by water inlet end, by the backwater temperature of the water inlet end of detection water heater 40
Degree, it is possible to judge when the water after heating arrives the water inlet end of water heater 40.
Controller 60, for when the return water temperature of water inlet end reaches the first preset temperature, controls water heater 40 and stops pre-
Heat, and obtain the preheating time first of water heater 40, and according to calculating the circulation preheating time of water heater 40 first preheating time,
And when water heater 40 is again turned on preheating function, controls water heater 40 preheating time according to the circulation of water heater 40 and follow
Ring preheats.
When the return water temperature of water inlet end reaches the first preset temperature set, can determine whether that the water after heating arrives water heater
The water inlet end of 40, the controlled heat water producer of controller 40 stops preheating then, and obtains and open water heater first from water heater 40
40 times stopping preheating, the preheating time first of hot water device 40.
When circulation can open the water mixing valve of use water end (W.E.) preheating time with user, be able to obtain hot water at gondola water faucet is standard.
It is to say, when water heater 40 is again turned on preheating function, if the time that water heater 40 carries out preheating is pre-less than this circulation
The heat time, then, when user opens the water mixing valve with water end (W.E.), the water at gondola water faucet is still cold water；If water heater 40 carry out preheating time
Between higher than this circulation preheating time, then have unnecessary water and enter tap water pipe line 10.
Should be appreciated that the current superheated water pipeline 20 after substantially can including heating first preheating time and tap water pipe line 10
The time experienced, therefore, the current superheated water after heating can be obtained according to the length of hot water line 20 and tap water pipe line 10
The time that pipeline 20 is experienced.
Water owing to first heating has temperature drop in pipeline, controller 60 when calculating circulation preheating time of water heater 40,
Also according to the default circulation compensation time, the circulation of water heater 40 can be modified preheating time such that it is able to improve further
By the comfortableness of water.The time that current superheated water pipeline 20 after heating is experienced compensates time sum with the circulation preset
Circulation preheating time as water heater 40.In one embodiment of the invention, hot water line 20 and tap water pipe line 10
Length is basically identical, the one of the preheating time first time that therefore the current superheated water pipeline 20 after heating is experienced
Half.It is to say, in one embodiment of the invention, controller 60 can calculate the circulation preheating of water heater according to below equation
Time:
T=T1/2+T0
Wherein, T is the circulation preheating time of water heater, and T1 is preheating time first, and T0 is that default circulation compensates the time.
In one particular embodiment of the present invention, it can be the 15-25 second that the circulation preset compensates time T0.
In other embodiments of the invention, also can water heater 40 first open preheating function time, detection water end (W.E.)
Temperature, by sending to controller 60 by the temperature of water end (W.E.) so that controller 60 is reaching default temperature by the temperature of water end (W.E.)
When spending, control water heater 40 and stop preheating such that it is able to directly using the preheating time first of water heater 40 as the water after heating
Flow through the time that hot water line 20 is experienced.
When water heater 40 is again turned on preheating function, heater and water pump can be opened simultaneously, and when circulation preheating
Heater and water pump is closed, so that hot water reaches to use water end (W.E.) just after between.
Water-heater system according to embodiments of the present invention, when preheating function opened first by water heater, controller can basis
The return water temperature of the water inlet end of water heater obtains the preheating time first of water heater, and according to calculating water heater preheating time first
Circulation preheating time, when water heater is again turned on preheating function, hot water can be controlled preheating time according to the circulation of water heater
Device is circulated preheating.Thereby, it is possible to automatically obtain suitable preheating time, and can be conveniently and efficiently according to acquired pre-
The heat time carries out warm-up control to water heater, thus can not only reduce the time of pre-hot standby, additionally it is possible to avoid the wave of hot water
Take, substantially increase Consumer's Experience.
In describing the invention, it is to be understood that term " " center ", " longitudinally ", " laterally ", " length ", " width ",
" thickness ", " on ", D score, "front", "rear", "left", "right", " vertically ", " level ", " top ", " end ", " interior ", " outward ", " up time
Pin ", " counterclockwise ", " axially ", " radially ", the orientation of the instruction such as " circumferential " or position relationship be based on orientation shown in the drawings or
Position relationship, is for only for ease of the description present invention and simplifies description rather than instruction or imply that the device of indication or element must
Must have specific orientation, with specific azimuth configuration and operation, be therefore not considered as limiting the invention.
Additionally, term " first ", " second " are only used for describing purpose, and it is not intended that instruction or hint relative importance
Or the implicit quantity indicating indicated technical characteristic.Thus, define " first ", the feature of " second " can express or
Implicitly include one or more this feature.In describing the invention, " multiple " are meant that two or more,
Unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing " etc.
Term should be interpreted broadly, and connects for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be that machinery connects
Connect, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, in can being two elements
The connection in portion or the interaction relationship of two elements.For the ordinary skill in the art, can be according to concrete feelings
Condition understands above-mentioned term concrete meaning in the present invention.
In the present invention, unless otherwise clearly defined and limited, fisrt feature second feature " on " or D score permissible
It is that the first and second features directly contact, or the first and second features are by intermediary mediate contact.And, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature directly over second feature or oblique upper, or be merely representative of
Fisrt feature level height is higher than second feature.Fisrt feature second feature " under ", " lower section " and " below " can be
One feature is immediately below second feature or obliquely downward, or is merely representative of fisrt feature level height less than second feature.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or spy
Point is contained at least one embodiment or the example of the present invention.In this manual, to the schematic representation of above-mentioned term not
Identical embodiment or example must be directed to.And, the specific features of description, structure, material or feature can be in office
One or more embodiments or example combine in an appropriate manner.Additionally, in the case of the most conflicting, the skill of this area
The feature of the different embodiments described in this specification or example and different embodiment or example can be tied by art personnel
Close and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is example
Property, it is impossible to being interpreted as limitation of the present invention, those of ordinary skill in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, revises, replaces and modification.
Claims (10)
1. the preheating control method of a water-heater system, it is characterised in that described water-heater system includes tap water pipe line, heat
Water lines, H valve and water heater, wherein, the first entrance of described H valve is connected to described tap water pipe line, and the second of described H valve enters
Mouth is connected to described hot water line, and described water heater, when preheating function and opening, controls the water of described water heater preheating described
The loop of hot water line, described H valve, described tap water pipe line and described water heater composition is circulated, to be circulated preheating, institute
The method of stating comprises the following steps:
When described preheating function opened first by described water heater, detect the return water temperature of the water inlet end of described water heater；
When the return water temperature of described water inlet end reaches the first preset temperature, control described water heater and stop preheating, and obtain institute
State the preheating time first of water heater；
The circulation preheating time of described water heater is calculated according to described preheating time first；
When described water heater is again turned on described preheating function, control described heat preheating time according to the circulation of described water heater
Hydrophone is circulated preheating.
The preheating control method of water-heater system the most according to claim 1, it is characterised in that calculating described water heater
Circulation preheating time time, always according to the default circulation compensation time, the circulation of described water heater is modified preheating time.
The preheating control method of water-heater system the most according to claim 2, it is characterised in that calculate according to below equation
The circulation preheating time of described water heater:
T=T1/2+T0
Wherein, T is the circulation preheating time of described water heater, and T1 is described preheating time first, and T0 is described default circulation
The compensation time.
The preheating control method of water-heater system the most according to claim 3, it is characterised in that described T0 is the 15-25 second.
5. according to the preheating control method of the water-heater system according to any one of claim 1-4, it is characterised in that described heat
Hydrophone is gas heater.
6. a water-heater system, it is characterised in that including:
Tap water pipe line and hot water line；
H valve, the first entrance of described H valve is connected to described tap water pipe line, and the second entrance of described H valve is connected to described hot water
Pipeline；
Water heater, described water heater, when preheating function and opening, controls the water of described water heater preheating in described hot water line, institute
State in the loop of H valve, described tap water pipe line and described water heater composition and circulate；
Temperature detector, described temperature detector is for when described preheating function opened first by described water heater, and detection is described
The return water temperature of the water inlet end of water heater；
Controller, described controller, for when the return water temperature of described water inlet end reaches the first preset temperature, controls described heat
Hydrophone stops preheating, and obtains the preheating time first of described water heater, and calculates described heat according to described preheating time first
The circulation preheating time of hydrophone, and when described water heater is again turned on described preheating function, according to following of described water heater
The ring described water heater of control preheating time is circulated preheating.
Water-heater system the most according to claim 6, it is characterised in that described controller is calculating following of described water heater
During ring preheating time, always according to the default circulation compensation time, the circulation of described water heater is modified preheating time.
Water-heater system the most according to claim 7, it is characterised in that described controller calculates described according to below equation
The circulation preheating time of water heater:
T=T1/2+T0
Wherein, T is the circulation preheating time of described water heater, and T1 is described preheating time first, and T0 is described default circulation
The compensation time.
Water-heater system the most according to claim 8, it is characterised in that described T0 is the 15-25 second.
10. according to the water-heater system according to any one of claim 6-9, it is characterised in that described water heater is combustion gas heat
Hydrophone.
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| CN201610564621.1A CN106052143B (en) | 2016-07-18 | 2016-07-18 | Water-heater system and its preheating control method |
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| CN107990560A (en) * | 2017-12-01 | 2018-05-04 | 广东万家乐燃气具有限公司 | Water heater pre-heating mean and water heater |
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| CN112283953A (en) * | 2019-07-22 | 2021-01-29 | 芜湖美的厨卫电器制造有限公司 | Hot water treatment device and control method and device thereof |
| CN113701355A (en) * | 2021-08-24 | 2021-11-26 | 广东万和新电气股份有限公司 | Gas water heating system and control method thereof |
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| CN110017614B (en) * | 2019-03-27 | 2021-07-13 | 华帝股份有限公司 | Control device and control method for zero-cold-water heater |
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| CN111174444A (en) * | 2020-02-25 | 2020-05-19 | 华帝股份有限公司 | Control method for intelligent preheating of zero-cold-water heater |
| CN111396979A (en) * | 2020-03-27 | 2020-07-10 | 广东万家乐燃气具有限公司 | Central hot water system and rapid preheating method thereof |
| CN111561786A (en) * | 2020-04-03 | 2020-08-21 | 华帝股份有限公司 | Preheating control method of zero-cold-water gas water heater |
| CN114061152A (en) * | 2020-08-05 | 2022-02-18 | 芜湖美的厨卫电器制造有限公司 | Water heater, preheating control method and device of water heater and computer readable storage medium |
| CN113701355A (en) * | 2021-08-24 | 2021-11-26 | 广东万和新电气股份有限公司 | Gas water heating system and control method thereof |
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