CN106052143B - Water-heater system and its preheating control method - Google Patents
Water-heater system and its preheating control method Download PDFInfo
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- CN106052143B CN106052143B CN201610564621.1A CN201610564621A CN106052143B CN 106052143 B CN106052143 B CN 106052143B CN 201610564621 A CN201610564621 A CN 201610564621A CN 106052143 B CN106052143 B CN 106052143B
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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 kind of water-heater system and its preheating control methods, method includes the following steps: detecting the return water temperature of the water inlet end of water heater when water heater opens pre- heat function for the first time；When the return water temperature of water inlet end reaches the first preset temperature, control water heater stops preheating, and obtains the preheating time for the first time of water heater；The circulation preheating time of water heater is calculated according to preheating time for the first time；When water heater is again turned on pre- heat function, water heater is controlled according to the circulation preheating time of water heater and carries out circulation preheating.According to the method for the present invention, suitable preheating time can be obtained automatically, and warm-up control conveniently and efficiently can be carried out to water heater according to acquired preheating time, so that the time of pre- hot standby can not only be reduced, the waste that can also avoid hot water, substantially increases user experience.
Description
Technical field
The present invention relates to technical field of water heaters, in particular to the preheating control method of a kind of water-heater system and a kind of heat
Water heater system.
Background technique
Water heater in the market, such as gas heater etc. can be with pre- heat function be recycled, can be to the water in circulation line
It is preheated, to achieve the purpose that obtain hot water with opening valve when water.
Currently, can set, fixed a few minutes clock time is preheated or return water reaches setting value and completes preheating.However in use process
In due to environment, the water route of user family etc. difference, required circulation preheating time is all different.If preheating time mistake
It is short, then it will increase the waiting time of user；If preheating time is longer or return water reaches setting value and completes preheating, it is extra to will lead to
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 modify, this is undoubtedly not convenient enough.
Summary of the invention
The present invention is directed to solve one of the technical problem in above-mentioned technology at least to a certain extent.For this purpose, of the invention
One purpose is to propose a kind of preheating control method of water-heater system, can obtain suitable preheating time, and energy automatically
It is enough that warm-up control is conveniently and efficiently carried out to water heater according to acquired preheating time, so that pre- hot standby can not only be reduced
Time, additionally it is possible to the waste for avoiding hot water substantially increases user experience.
Second object of the present invention is to propose a kind of water-heater system.
In order to achieve the above objectives, first aspect present invention embodiment proposes a kind of warm-up control side of water-heater system
Method, wherein the water-heater system includes tap water pipe line, hot water line, H valve and water heater, wherein the first of the H valve
Entrance is connected to the tap water pipe line, and the second entrance of the H valve is connected to the hot water line, and the water heater is preheating
When function is opened, the water of water heater preheating is controlled in the hot water line, the H valve, the tap water pipe line and described
It is recycled in the circuit of water heater composition, to carry out circulation preheating, the described method comprises the following steps: being opened for the first time in the water heater
When opening the pre- heat function, the return water temperature of the water inlet end of the water heater is detected；When the return water temperature of the water inlet end reaches
When the first preset temperature, controls the water heater and stop preheating, and obtain the preheating time for the first time of the water heater；According to described
Preheating time calculates the circulation preheating time of the water heater for the first time；When the water heater is again turned on the pre- heat function,
The water heater, which is controlled, according to the circulation preheating time of the water heater carries out circulation preheating.
The preheating control method of water-heater system according to an embodiment of the present invention opens pre- heat function in water heater for the first time
When, the preheating time for the first time of water heater is obtained according to the return water temperature of the water inlet end of water heater, and count according to preheating time for the first time
The circulation preheating time for calculating water heater is controlled when water heater is again turned on pre- heat function according to the circulation preheating time of water heater
Heat water producer carries out circulation preheating.Thereby, it is possible to obtain suitable preheating time automatically, and can be conveniently and efficiently according to being obtained
The preheating time taken carries out warm-up control to water heater, so that the time of pre- hot standby can not only be reduced, additionally it is possible to avoid heat
The waste of water, substantially increases user experience.
In addition, the preheating control method of the water-heater system proposed according to that above embodiment of the present invention can also have it is as follows
Additional technical characteristic:
Further, when calculating the circulation preheating time of the water heater, the time pair is compensated also according to preset circulation
The circulation preheating time of the water heater is modified.
Further, the circulation preheating time of the water heater is calculated according to the following formula:
T=T1/2+T0
Wherein, T is the circulation preheating time of the water heater, and T1 is the preheating time for the first time, and T0 is described preset
The circulation compensation time.
Specifically, the T0 is 15-25 seconds.
According to one embodiment of present invention, the water heater is gas heater.
In order to achieve the above objectives, second aspect of the present invention embodiment proposes a kind of water-heater system, which includes: certainly
Come water lines and hot water line；H valve, the first entrance of the H valve are connected to the tap water pipe line, and the second of the H valve enters
Mouth is connected to the hot water line；Water heater, the water heater control the water of the water heater preheating when pre- heat function is opened
It is recycled in the circuit of the hot water line, the H valve, the tap water pipe line and the water heater composition；Temperature detector,
The temperature detector is used for when the water heater opens the pre- heat function for the first time, detects the water inlet end of the water heater
Return water temperature；Controller, the controller are used for when the return water temperature of the water inlet end reaches the first preset temperature, control institute
It states water heater and stops preheating, and obtain the preheating time for the first time of the water heater, and institute is calculated according to the preheating time for the first time
The circulation preheating time of water heater is stated, and when the water heater is again turned on the pre- heat function, according to the water heater
Circulation preheating time control the water heater and carry out circulation preheating.
Water-heater system according to an embodiment of the present invention, when water heater opens pre- heat function for the first time, controller can basis
The return water temperature of the water inlet end of water heater obtains the preheating time for the first time of water heater, and calculates water heater according to preheating time for the first time
Circulation preheating time, when water heater is again turned on pre- heat function, can according to the circulation preheating time of water heater control hot water
Device carries out circulation preheating.Thereby, it is possible to obtain suitable preheating time automatically, and can be conveniently and efficiently according to acquired pre-
The hot time carries out warm-up control to water heater, so that the time of pre- hot standby can not only be reduced, additionally it is possible to avoid the wave of hot water
Take, substantially increases user experience.
In addition, the water-heater system proposed according to that above embodiment of the present invention can also have following additional technology special
Sign:
Further, the controller is when calculating the circulation preheating time of the water heater, also according to preset circulation
The compensation time is modified the circulation preheating time of the water heater.
Further, the controller calculates the circulation preheating time of the water heater according to the following formula:
T=T1/2+T0
Wherein, T is the circulation preheating time of the water heater, and T1 is the preheating time for the first time, and T0 is described preset
The circulation compensation time.
Specifically, the T0 is 15-25 seconds.
According to one embodiment of present invention, the water heater is gas heater.
Detailed description of the invention
Fig. 1 is the flow chart according to the preheating control method of the water-heater system of the embodiment of the present invention；
Fig. 2 is the structural schematic diagram according to the water-heater system of the embodiment of the present invention.
Appended drawing reference:
10- tap water pipe line, 20- hot water line, 30-H valve, 40- water heater, 50- temperature detector, 60- controller.
Specific embodiment
The embodiment of the present invention is described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning to end
Same or similar label indicates same or similar element or element with the same or similar functions.Below with reference to attached
The embodiment of figure description is exemplary, it is intended to is used to explain the present invention, and is not considered as limiting the invention.
The water-heater system and its preheating control method of the embodiment of the present invention described with reference to the accompanying drawing.
Fig. 1 is the flow chart according to the preheating control method of the water-heater system of the embodiment of the present invention.
It should be noted that as shown in Fig. 2, 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 can open heating devices heat and enter originally when pre- heat function is opened
Water, and built-in water pump is opened, the water after making heating flows into hot water line.Since water mixing valve is not opened, flow into hot water line's
Water further can flow into tap water pipe line by H valve.The water of controllable heat water producer preheating is in hot water line, H valve, originally as a result,
It is recycled in the circuit of water lines and water heater composition, to carry out circulation preheating.
As shown in Figure 1, the preheating control method of the water-heater system of the embodiment of the present invention the following steps are included:
S1 detects the return water temperature of the water inlet end of water heater when water heater opens pre- heat function for the first time.
Water heater is connected by water inlet end with tap water pipe line, the return water temperature of the water inlet end by detecting water heater, energy
When water after enough judgement heating reaches the water inlet end of water heater.
S2, when the return water temperature of water inlet end reaches the first preset temperature, control water heater stops preheating, and obtains hot water
The preheating time for the first time of device.
When the return water temperature of water inlet end reaches the first preset temperature of setting, the water after can determine whether heating reaches water heater
Water inlet end, then controllable heat water producer stops preheating, and obtain opened for the first time from water heater to water heater stop preheating when
Between, the preheating time for the first time of hot water device.
S3 calculates the circulation preheating time of water heater according to preheating time for the first time.
Wherein, when circulation preheating time can open the water mixing valve with water end (W.E.) with user, hot water be able to be obtained from shower is
Standard.That is, when water heater is again turned on pre- heat function, if the time that water heater is preheated is pre- lower than the circulation
The hot time, then when user opens the water mixing valve with water end (W.E.), the water at shower is still cold water；If the time that water heater is preheated
Higher than the circulation preheating time, there will be extra water to enter tap water pipe line.
It should be appreciated that preheating time substantially may include that water flow overheat water lines and tap water pipe line after heating are passed through for the first time
Therefore the time gone through can obtain the water flow overheat water lines after heating according to the length of hot water line and tap water pipe line and be passed through
The time gone through.
It, can also be according to pre- when calculating the circulation preheating time of water heater since the water first heated has temperature drop in pipeline
If circulation compensation the time circulation preheating time of water heater is modified, so as to further increase use water it is comfortable
Property.The sum of water flow overheat water lines time experienced and preset circulation compensation time after heating can be used as water heater
Recycle preheating time.In one embodiment of the invention, the length of hot water line and tap water pipe line is almost the same, therefore adds
The water flow overheat water lines time experienced substantially half of preheating time for the first time after heat.That is, of the invention
In one embodiment, the circulation preheating time of water heater can be calculated according to the following formula:
T=T1/2+T0
Wherein, T is the circulation preheating time of water heater, and T1 is that preheating time, T0 are that preset circulation compensates the time for the first time.
In one particular embodiment of the present invention, preset circulation compensation time T0 can be 15-25 seconds.
In other embodiments of the invention, also the temperature for using water end (W.E.) can be detected when water heater opens pre- heat function for the first time
Degree, by the way that water heater will be sent to the temperature of water end (W.E.), so that controlling hot water when reaching preset temperature with the temperature of water end (W.E.)
Device stops preheating, so as to directly be undergone the preheating time for the first time of water heater as the water flow overheat water lines after heating
Time.
S4 controls water heater according to the circulation preheating time of water heater and carries out when water heater is again turned on pre- heat function
Circulation preheating.
When water heater is again turned on pre- heat function, heating device and water pump can be opened simultaneously, and in circulation preheating time
Heating device and water pump are closed afterwards, so that reaching hot water just uses water end (W.E.).
The preheating control method of water-heater system according to an embodiment of the present invention opens pre- heat function in water heater for the first time
When, the preheating time for the first time of water heater is obtained according to the return water temperature of the water inlet end of water heater, and count according to preheating time for the first time
The circulation preheating time for calculating water heater is controlled when water heater is again turned on pre- heat function according to the circulation preheating time of water heater
Heat water producer carries out circulation preheating.Thereby, it is possible to obtain suitable preheating time automatically, and can be conveniently and efficiently according to being obtained
The preheating time taken carries out warm-up control to water heater, so that the time of pre- hot standby can not only be reduced, additionally it is possible to avoid heat
The waste of water, substantially increases user experience.
The preheating control method of the water-heater system of corresponding above-described embodiment, the present invention also propose a kind of water-heater system.
Referring to Fig. 2, the water-heater system of the embodiment of the present invention, comprising: 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 can open built-in heating device when pre- heat function is opened
The tap water entered is heated, and opens built-in water pump, the water after making heating flows into hot water line.Since water mixing valve is not opened,
The water for flowing into hot water line further can flow into tap water pipe line by H valve.The water that controllable heat water producer 40 preheats as a result, is in warm
It is recycled in the circuit that water lines 20, H valve 30, tap water pipe line 10 and water heater 40 form.
Temperature detector 50 is used for when water heater 40 opens pre- heat function for the first time, detects the return water of the water inlet end of water heater
Temperature.
Water heater 40 is connected by water inlet end with tap water pipe line 10, the return water temperature of the water inlet end by detecting water heater 40
When degree, the water after capable of judging heating reach the water inlet end of water heater 40.
Controller 60 is used for when the return water temperature of water inlet end reaches the first preset temperature, and control water heater 40 stops pre-
Heat, and the preheating time for the first time of water heater 40 is obtained, and the circulation preheating time of water heater 40 is calculated according to preheating time for the first time,
And when water heater 40 is again turned on pre- heat function, water heater 40 is controlled according to the circulation preheating time of water heater 40 and is followed
Ring preheating.
When the return water temperature of water inlet end reaches the first preset temperature of setting, the water after can determine whether heating reaches water heater
40 water inlet end, then the controllable heat water producer of controller 40 stops preheating, and obtains and opened for the first time from water heater 40 to water heater
40 stop the time of preheating, the preheating time for the first time of hot water device 40.
When circulation preheating time can open the water mixing valve with water end (W.E.) with user, it is standard that hot water be able to be obtained from shower.
That is, when water heater 40 is again turned on pre- heat function, if the time that water heater 40 is preheated is pre- lower than the circulation
The hot time, then when user opens the water mixing valve with water end (W.E.), the water at shower is still cold water；If water heater 40 preheated when
Between be higher than the circulation preheating time, there will be extra water to enter tap water pipe line 10.
It should be appreciated that preheating time substantially may include water flow overheat water lines 20 and the tap water pipe line 10 after heating for the first time
Therefore time experienced can obtain the water flow superheated water after heating according to the length of hot water line 20 and tap water pipe line 10
The time experienced of pipeline 20.
Since the water first heated has a temperature drop in pipeline, controller 60 when calculating the circulation preheating time of water heater 40,
The circulation preheating time of water heater 40 can be also modified according to the preset circulation compensation time, so as to further increase
With the comfort of water.The sum of water flow overheat time experienced of water lines 20 and preset circulation compensation time after heating
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 almost the same, therefore the water flow overheat time experienced of water lines 20 substantially the one of preheating time for the first time after heating
Half.That is, in one embodiment of the invention, controller 60 can calculate the circulation preheating of water heater according to the following formula
Time:
T=T1/2+T0
Wherein, T is the circulation preheating time of water heater, and T1 is that preheating time, T0 are that preset circulation compensates the time for the first time.
In one particular embodiment of the present invention, preset circulation compensation time T0 can be 15-25 seconds.
In other embodiments of the invention, it can also detect when water heater 40 opens pre- heat function for the first time with water end (W.E.)
Temperature, by the way that controller 60 will be sent to the temperature of water end (W.E.), so that controller 60 is reaching preset temperature with the temperature of water end (W.E.)
When spending, control water heater 40 stops preheating, so as to directly using the preheating time for the first time of water heater 40 as the water after heating
Flow through the time experienced of hot water line 20.
When water heater 40 is again turned on pre- heat function, heating device and water pump can be opened simultaneously, and when recycling preheating
Between after close heating device and water pump, so that reaching hot water just uses water end (W.E.).
Water-heater system according to an embodiment of the present invention, when water heater opens pre- heat function for the first time, controller can basis
The return water temperature of the water inlet end of water heater obtains the preheating time for the first time of water heater, and calculates water heater according to preheating time for the first time
Circulation preheating time, when water heater is again turned on pre- heat function, can according to the circulation preheating time of water heater control hot water
Device carries out circulation preheating.Thereby, it is possible to obtain suitable preheating time automatically, and can be conveniently and efficiently according to acquired pre-
The hot time carries out warm-up control to water heater, so that the time of pre- hot standby can not only be reduced, additionally it is possible to avoid the wave of hot water
Take, substantially increases user experience.
In the description of the present invention, it is to be understood that, term " center ", " longitudinal direction ", " transverse direction ", " length ", " width ",
" thickness ", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outside", " up time
The orientation or positional relationship of the instructions such as needle ", " counterclockwise ", " axial direction ", " radial direction ", " circumferential direction " be orientation based on the figure or
Positional relationship is merely for convenience of description of the present invention and simplification of the description, rather than the device or element of indication or suggestion meaning must
There must be specific orientation, be constructed and operated in a specific orientation, therefore be not considered as limiting the invention.
In addition, term " first ", " second " are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance
Or implicitly indicate the quantity of indicated technical characteristic.Define " first " as a result, the feature of " second " can be expressed or
Implicitly include one or more of the features.In the description of the present invention, the meaning of " plurality " is two or more,
Unless otherwise specifically defined.
In the present invention unless specifically defined or limited otherwise, term " installation ", " connected ", " connection ", " fixation " etc.
Term shall be understood in a broad sense, for example, it may be being fixedly connected, may be a detachable connection, or integral；It can be mechanical connect
It connects, is also possible to be electrically connected；It can be directly connected, can also can be in two elements indirectly connected through an intermediary
The interaction relationship of the connection in portion or two elements.It for the ordinary skill in the art, can be according to specific feelings
Condition understands the concrete meaning of above-mentioned term in the present invention.
In the present invention unless specifically defined or limited otherwise, fisrt feature in the second feature " on " or " down " can be with
It is that the first and second features directly contact or the first and second features pass through intermediary mediate contact.Moreover, fisrt feature exists
Second feature " on ", " top " and " above " but fisrt feature be directly above or diagonally above the second feature, or be merely representative of
First feature horizontal height is higher than second feature.Fisrt feature can be under the second feature " below ", " below " and " below "
One feature is directly under or diagonally below the second feature, or is merely representative of first feature horizontal height less than second feature.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is included at least one embodiment or example of the invention.In the present specification, schematic expression of the above terms are not
It must be directed to identical embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be in office
It can be combined in any suitable manner in one or more embodiment or examples.In addition, without conflicting with each other, the skill of this field
Art personnel can tie the feature of different embodiments or examples described in this specification and different embodiments or examples
It closes and combines.
Although the embodiments of the present invention has been shown and described above, it is to be understood that above-described embodiment is example
Property, it is not considered as limiting the invention, those skilled in the art within the scope of the invention can be to above-mentioned
Embodiment is changed, modifies, replacement and variant.
Claims (10)
1. a kind of preheating control method of water-heater system, the water-heater system includes tap water pipe line, hot water line and Re
Hydrophone, which is characterized in that the water-heater system further includes H valve, wherein the first entrance of the H valve be connected to it is described originally
Water lines, the second entrance of the H valve are connected to the hot water line, and the water heater controls institute when pre- heat function is opened
The water of water heater preheating is stated in the circuit that the hot water line, the H valve, the tap water pipe line and the water heater form
Circulation, to carry out circulation preheating, the described method comprises the following steps:
When the water heater opens the pre- heat function for the first time, the return water temperature of the water inlet end of the water heater is detected；
When the return water temperature of the water inlet end reaches the first preset temperature, controls the water heater and stop preheating, and obtain institute
State the preheating time for the first time of water heater；
The circulation preheating time of the water heater is calculated according to the preheating time for the first time；
When the water heater is again turned on the pre- heat function, the heat is controlled according to the circulation preheating time of the water heater
Hydrophone carries out circulation preheating.
2. the preheating control method of water-heater system according to claim 1, which is characterized in that calculating the water heater
Circulation preheating time when, also according to preset circulation compensation the time circulation preheating time of the water heater is modified.
3. the preheating control method of water-heater system according to claim 2, which is characterized in that calculate according to the following formula
The circulation preheating time of the water heater:
T=T1/2+T0
Wherein, T is the circulation preheating time of the water heater, and T1 is the preheating time for the first time, and T0 is the preset circulation
Compensate the time.
4. the preheating control method of water-heater system according to claim 3, which is characterized in that the T0 is 15-25 seconds.
5. the preheating control method of water-heater system described in any one of -4 according to claim 1, which is characterized in that the heat
Hydrophone is gas heater.
6. a kind of water-heater system, including tap water pipe line and hot water line, which is characterized in that further include:
H valve, the first entrance of the H valve are connected to the tap water pipe line, and the second entrance of the H valve is connected to the hot water
Pipeline；
Water heater, the water heater control the water of the water heater preheating in the hot water line, institute when pre- heat function is opened
It states and is recycled in the circuit of H valve, the tap water pipe line and water heater composition；
Temperature detector, the temperature detector is used for when the water heater opens the pre- heat function for the first time, described in detection
The return water temperature of the water inlet end of water heater；
Controller, the controller are used for when the return water temperature of the water inlet end reaches the first preset temperature, control the heat
Hydrophone stops preheating, and obtains the preheating time for the first time of the water heater, and calculates the heat according to the preheating time for the first time
The circulation preheating time of hydrophone, and when the water heater is again turned on the pre- heat function, according to following for the water heater
Ring preheating time controls the water heater and carries out circulation preheating.
7. water-heater system according to claim 6, which is characterized in that the controller is calculating following for the water heater
When ring preheating time, the circulation preheating time of the water heater is modified also according to the preset circulation compensation time.
8. water-heater system according to claim 7, which is characterized in that described in the controller calculates according to the following formula
The circulation preheating time of water heater:
T=T1/2+T0
Wherein, T is the circulation preheating time of the water heater, and T1 is the preheating time for the first time, and T0 is the preset circulation
Compensate the time.
9. water-heater system according to claim 8, which is characterized in that the T0 is 15-25 seconds.
10. the water-heater system according to any one of claim 6-9, which is characterized in that the 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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| CN201610564621.1A CN106052143B (en) | 2016-07-18 | 2016-07-18 | Water-heater system and its preheating control method |
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| CN106052143B true CN106052143B (en) | 2018-12-21 |
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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 |
| 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 |
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| CN114061152B (en) * | 2020-08-05 | 2023-05-30 | 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 readable storage medium |
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| CN106052143A (en) | 2016-10-26 |
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