CN112484310B - Control method of electric water regulating valve of gas water heater - Google Patents
Control method of electric water regulating valve of gas water heater Download PDFInfo
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- CN112484310B CN112484310B CN202011260453.XA CN202011260453A CN112484310B CN 112484310 B CN112484310 B CN 112484310B CN 202011260453 A CN202011260453 A CN 202011260453A CN 112484310 B CN112484310 B CN 112484310B
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- 238000000034 method Methods 0.000 title claims abstract description 48
- 239000008236 heating water Substances 0.000 claims abstract description 52
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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
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- 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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Abstract
The invention belongs to the technical field of gas water heaters, and discloses a control method of an electric water regulating valve of a gas water heater, which comprises the following steps: if the actual heat load P of the gas water heaterPractice ofReach the rated thermal load P0And the temperature T of the outlet waterGo outIs not equal to the preset water outlet temperature TPreset ofAccording to the constant thermal load P0Presetting the water outlet temperature TPreset ofAnd inlet water temperature TIntoDetermining the maximum heating water flow L of the gas water heatermax(ii) a If the actual water flow LPractice ofLess than or equal to the maximum heating water flow LmaxIf so, maintaining the current opening degree of the electric water regulating valve; if the actual water flow LPractice ofGreater than the maximum heating water flow LmaxAnd adjusting the opening of the electric water regulating valve. The invention effectively solves the problem that the outlet water temperature of the electric water regulating valve of the existing gas water heater can not reach the outlet water temperature preset by a user quickly in the process of regulating the opening.
Description
Technical Field
The invention belongs to the technical field of gas water heaters, and particularly relates to a control method of an electric water regulating valve of a gas water heater.
Background
In the existing gas water heater, the opening degree of the electric water regulating valve is increased by the positive rotation of the stepping motor, and the opening degree of the electric water regulating valve is reduced by the overturning of the stepping motor. When the gas water heater is under the rated heat load, if the water outlet temperature is still lower than the preset water outlet temperature, the opening degree of the electric water regulation can be reduced by controlling the reverse rotation of the stepping motor, and the water outlet temperature is the same as the preset water outlet temperature.
However, in the above adjustment process, repeated adjustment may be required, and each adjustment requires a certain response time, which may result in that the outlet water temperature may not reach the preset outlet water temperature quickly, thereby reducing the user experience and causing the fluctuation of the water temperature to be large.
Disclosure of Invention
The invention provides a control method of an electric water regulating valve of a gas water heater, aiming at solving the problem that the outlet water temperature cannot reach the outlet water temperature preset by a user quickly in the process of regulating the opening degree of the electric water regulating valve of the existing gas water heater.
The invention is realized by adopting the following scheme:
the invention provides a control method of an electric water regulating valve of a gas water heater, which comprises the following steps:
starting the gas water heater if the actual heat load P of the gas water heaterPractice ofReach the rated thermal load P0And the actual outlet water temperature T of the hot water outlet pipeGo outLower than the preset outlet water temperature T of the userPreset ofAccording to the rated thermal load P of the gas water heater0Presetting the water outlet temperature TPreset ofAnd the inlet water temperature T of the cold water inlet pipeIntoDetermining the maximum heating water flow L of the gas water heatermax；
If the actual water flow L of the hot water outlet pipePractice ofLess than or equal to the maximum heating water flow LmaxIf the current opening degree of the electric water regulating valve is maintained, after the first time threshold value, the actual outlet water temperature TGo outReach the preset water outlet temperature TPreset of；
If the actual water flow L of the hot water outlet pipePractice ofGreater than the maximum heating water flow LmaxIf so, adjusting the opening degree of the electric water regulating valve, and after a second time threshold value, actually outputting the water temperature TGo outReach the preset water outlet temperature TPreset of；
Actual water flow L of the hot water outlet pipePractice ofGreater than the maximum heating water flow LmaxAdjusting the opening degree of the electric water regulating valve specifically comprises:
if the maximum heating water flowQuantity LmaxSatisfies the following conditions: l ismax＜LminIf so, adjusting the opening degree of the electric water regulating valve to the minimum opening degree;
if the maximum heating water flow LmaxSatisfies the following conditions: l ismax≥LminThen according to LminAnd a minimum opening degree B of the electric water regulating valveminCalculating the actual water flow rate LPractice ofEqual to the maximum heating water flow LmaxThe required opening degree B is obtained, and the electric water regulating valve is directly regulated to the required opening degree B;
wherein L isminAnd when the electric water regulating valve is in the minimum opening degree, the corresponding minimum heating water flow threshold value of the gas water heater is obtained.
The control method of the electric water regulating valve of the gas water heater is further improved according to the LminAnd a minimum opening degree B of the electric water regulating valveminCalculating the actual water flow rate LPractice ofEqual to the maximum heating water flow LmaxThe required opening degree B specifically includes:
Lpractice of=（L0-Lmin）×（Bmin-B）/（Bmin-B0）+LminWherein B is0Is a preset opening threshold value, L, of the electric water regulating valve0When the opening degree of the electric water regulating valve is a preset opening degree threshold value B0And the collected initial water outlet flow of the hot water outlet pipe.
The control method of the electric water regulating valve of the gas water heater is further improved in that the opening degree of the electric water regulating valve is represented by steps, and the steps are inversely proportional to the opening degree of the electric water regulating valve.
The control method of the electric water regulating valve of the gas water heater is further improved in that if the opening degree of the electric water regulating valve is the maximum opening degree BmaxIf yes, the corresponding step number is 0; when the opening degree of the electric water regulating valve is the minimum opening degree BminThen, the maximum number of steps is corresponded.
Electric control of gas water heater of the inventionThe control method of the water valve is further improved when the actual outlet water temperature T isGo outReach the preset water outlet temperature TPreset ofThen, the actual heat load P of the gas water heater is determined once every third time thresholdPractice ofBy the actual thermal load PPractice ofRated thermal load P0And (3) fine-tuning the opening of the electric water regulating valve.
The control method of the electric water regulating valve of the gas water heater is further improved if the actual heat load PPractice ofSatisfies the following conditions: w2×P0≤PPractice of≤W1×P0Keeping the opening degree of the current electric water regulating valve unchanged, wherein 0 < W2＜W1＜1；
If the actual heat load PPractice ofSatisfies the following conditions: pPractice of＞W1×P0Then the opening degree of the electric water regulating valve is reduced until the actual heat load PPractice ofSatisfies the following conditions: w2×P0≤PPractice of≤W1×P0Until the end;
if the actual heat load PPractice ofSatisfies the following conditions: pPractice of＜W2×P0The opening degree of the electric water regulating valve is increased until the actual heat load PPractice ofSatisfies the following conditions: w2×P0≤PPractice of≤W1×P0Until now.
The control method of the electric water regulating valve of the gas water heater is further improved in that if the opening degree of the electric water regulating valve is reduced, the opening degree is reduced to the minimum opening degree BminTime, actual heat load PPractice ofIt still cannot satisfy: w2×P0≤PPractice of≤W1×P0Stopping adjusting the electric water regulating valve to keep the electric water regulating valve at the minimum opening degree Bmin；
If the opening of the electric water regulating valve is increased, when the opening is increased to the maximum opening BmaxTime, actual heat load PPractice ofIt still cannot satisfy: w2×P0≤PPractice of≤W1×P0Stopping adjusting the electric water regulating valve to keep the electric water regulating valve at the maximum opening degree Bmax。
The control method of the electric water regulating valve of the gas water heater is further improved in that W190% -98% of the total weight of W280 to 88 percent.
The control method of the electric water regulating valve of the gas water heater is further improved in that the control method is based on the rated heat load P0Presetting the water outlet temperature TPreset ofAnd the inlet water temperature T of the cold water inlet pipeIntoDetermining the maximum heating water flow L of the gas water heatermaxThe method specifically comprises the following steps:
W3×P0=Lmax×（Tpreset of-TInto）/T0Wherein T is0Represents the maximum temperature at which water with a water flow of 1L/min can be heated per 1KW of thermal load, wherein 0 < W3＜1。
The control method of the electric water regulating valve of the gas water heater is further improved in that after the gas water heater is shut down, the opening degree of the electric water regulating valve is restored to the preset opening degree threshold value B0。
The control method of the electric water regulating valve of the gas water heater is further improved in that the actual heat load P of the gas water heaterPractice ofIs obtained by the following method:
acquiring actual outlet water temperature T of hot water outlet pipeGo outThe inlet water temperature T of the cold water inlet pipeIntoActual water flow L of hot water outlet pipePractice ofAccording to PPractice of=LPractice of×（TGo out-TInto）/T0Calculating the actual heat load P of the gas water heaterPractice of(ii) a Wherein T is0Representing the maximum temperature at which water with a water flow of 1L/min can be heated per 1KW of thermal load.
Compared with the prior art, the invention adopting the scheme has the beneficial effects that:
in the present invention, if the gas is used for heating waterActual thermal load P of the vesselPractice ofReach the rated thermal load P0And the actual outlet water temperature T of the hot water outlet pipeGo outLower than the preset outlet water temperature T of the userPreset ofThen, it means that the gas water heater needs to control the stepping motor to adjust the opening of the electric water regulating valve so as to make the actual outlet water temperature TGo outReach the preset water outlet temperature TPreset of(ii) a During the adjustment, firstly, according to the rated thermal load P0Presetting the water outlet temperature TPreset ofAnd the inlet water temperature T of the cold water inlet pipeIntoDetermining the maximum heating water flow L of the gas water heatermaxBecause of this maximum heating water flow LmaxDirect and preset outlet water temperature TPreset ofIn connection with the purpose of adjustment, the maximum heating water flow rate L will be describedmaxActual outlet water temperature T of hot water outlet pipeGo outThere is a direct relationship; then, the actual water flow L of the hot water outlet pipe is adjusted byPractice ofAnd the maximum heating water flow LmaxComparing, determining how to adjust the opening of the electric water regulating valve according to the comparison result, and directly comparing the opening of the electric water regulating valve with the preset outlet water temperature T in a targeted mannerPreset ofActual water outlet temperature TGo outIn a related mode, the required opening degree can be quickly adjusted, repeated adjustment is avoided, the problem that the actual outlet water temperature of the existing electric water regulating valve of the gas water heater can not reach the outlet water temperature preset by a user quickly in the process of adjusting the opening degree is solved, and meanwhile the problem that the water temperature fluctuation is large is avoided.
Drawings
FIG. 1 is a flow chart of the operation of a method of controlling an electric water regulator of a gas water heater according to the present invention;
fig. 2 is another work flow chart of the control method of the electric water regulating valve of the gas water heater provided by the invention.
Detailed Description
So that the manner in which the above recited objects, features and advantages of the present invention can be understood in detail, a more particular description of the invention, briefly summarized above, may be had by reference to the embodiments thereof which are illustrated in the appended drawings. It should be noted that the embodiments and features of the embodiments of the present application may be combined with each other without conflict.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those specifically described herein, and therefore the scope of the present invention is not limited by the specific embodiments disclosed below.
As shown in fig. 1, in order to solve the above problem, the present embodiment provides a control method of an electric water regulating valve of a gas water heater, the method including the steps of:
s1, starting the gas water heater if the actual heat load P of the gas water heaterPractice ofReach the rated thermal load P0And the actual outlet water temperature T of the hot water outlet pipeGo outLower than the preset outlet water temperature T of the userPreset ofAccording to the rated thermal load P of the gas water heater0Presetting the water outlet temperature TPreset ofAnd the inlet water temperature T of the cold water inlet pipeIntoDetermining the maximum heating water flow L of the gas water heatermax；
S2, determining the actual water flow L of the hot water outlet pipePractice ofLess than or equal to the maximum heating water flow LmaxIf the current opening degree of the electric water regulating valve is maintained, after the first time threshold value, the actual outlet water temperature TGo outReach the preset water outlet temperature TPreset of；
If the actual water flow L of the hot water outlet pipePractice ofGreater than the maximum heating water flow LmaxIf so, adjusting the opening degree of the electric water regulating valve, and after a second time threshold value, actually outputting the water temperature TGo outReach the preset water outlet temperature TPreset of。
In the present embodiment, if the actual heat load P of the gas water heater isPractice ofReach the rated thermal load P0And the actual outlet water temperature T of the hot water outlet pipeGo outLower than the preset outlet water temperature T of the userPreset ofThen, it means that the gas water heater needs to control the stepping motor to adjust the opening of the electric water regulating valve so as to make the actual outlet water temperature TGo outReach the preset water outlet temperature TPreset of(ii) a In the process of adjustment, firstlyFirstly, according to the rated thermal load P0Presetting the water outlet temperature TPreset ofAnd the inlet water temperature T of the cold water inlet pipeIntoDetermining the maximum heating water flow L of the gas water heatermaxBecause of this maximum heating water flow LmaxDirect and preset outlet water temperature TPreset ofIn connection with the purpose of adjustment, the maximum heating water flow rate L will be describedmaxActual outlet water temperature T of hot water outlet pipeGo outThere is a direct relationship; then, the actual water flow L of the hot water outlet pipe is adjusted byPractice ofAnd the maximum heating water flow LmaxComparing, determining how to adjust the opening of the electric water regulating valve according to the comparison result, and directly comparing the opening of the electric water regulating valve with the preset outlet water temperature T in a targeted mannerPreset ofActual water outlet temperature TGo outIn a related mode, the required opening degree can be quickly adjusted, repeated adjustment is avoided, the problem that the actual outlet water temperature of the existing electric water regulating valve of the gas water heater can not reach the outlet water temperature preset by a user quickly in the process of adjusting the opening degree is solved, and meanwhile the problem that the water temperature fluctuation is large is avoided.
Wherein rated thermal load P0The maximum heating load of the whole machine is the fixed property of the gas water heater, namely after a gas water heater is determined, the rated heating load P of the gas water heater0Is determined.
Further, if the actual water flow L of the hot water outlet pipePractice ofGreater than the maximum heating water flow LmaxThen, turn down the aperture of electronic water regulation valve, specifically include:
if the maximum heating water flow LmaxSatisfies the following conditions: l ismax＜LminIf so, adjusting the opening degree of the electric water regulating valve to the minimum opening degree;
if the maximum heating water flow LmaxSatisfies the following conditions: l ismax≥LminThen according to LminAnd minimum opening degree B of electric water regulating valveminCalculating the actual water flow rate LPractice ofEqual to the maximum heating water flow LmaxThe required opening degree B is obtained, and the electric water regulating valve is directly regulated to the required opening degree B;
wherein L isminWhen the electric water regulating valve is in the minimum opening, the corresponding minimum heating water flow threshold value of the gas water heater is data preset in the data of a gas water heater control system in advance, and when the electric water regulating valve is required to be used, the electric water regulating valve is directly regulated from a database, and the optimal L is selectedminIs 5L/min.
If the calculated maximum heating water flow L is obtainedmaxLess than LminThen, the preset water outlet temperature T set by the user at the moment is indicatedPreset ofRelatively high, if the electric water regulating valve still keeps a large opening degree at the moment, the actual outlet water temperature T of the hot water outlet pipe existsGo outFar below the preset water outlet temperature TPreset ofAt this time, the opening degree of the electric water regulating valve needs to be regulated to the minimum opening degree, and the actual outlet water temperature T is increased as much as possibleGo out。
If the calculated maximum heating water flow L is obtainedmaxGreater than or equal to LminThen, it means that the actual outlet water temperature T can be achieved by adjusting the opening degree of the electric water regulating valveGo outReach the preset water outlet temperature TPreset ofIn order to adjust the opening degree of the electric water regulating valve in a targeted manner, in the embodiment, firstly, the opening degree is adjusted according to LminAnd minimum opening degree B of electric water regulating valveminCalculating the actual water flow rate LPractice ofEqual to the maximum heating water flow LmaxThe required aperture B, then, with the direct adjustment of electronic water transfer valve to required aperture B so far, realization adjustment that just so can be quick avoids adjusting repeatedly, has solved present gas heater's electronic water transfer valve and can't quick messenger's actual leaving water temperature reach the problem that the leaving water temperature was predetermine to the user at the in-process of adjustment aperture, avoids the great problem of temperature fluctuation to appear simultaneously.
Further, according to LminAnd minimum opening degree B of electric water regulating valveminCalculating the actual water flow rate LPractice ofEqual to the maximum heating water flow LmaxThe required opening degree B specifically includes:
Lpractice of=（L0-Lmin）×（Bmin-B）/（Bmin-B0）+LminWherein B is0Is a preset opening threshold value, L, of the electric water regulating valve0When the opening degree of the electric water regulating valve is a preset opening degree threshold value B0And the collected initial water outlet flow of the hot water outlet pipe.
In this embodiment, after the gas water heater is turned off, the opening degree of the electric water regulating valve is restored to the preset opening degree threshold value B0Therefore, after the gas water heater is started each time, the initial water outlet flow rate flowing out of the hot water outlet pipe is L0。
In a specific embodiment, the opening degree of the electric water regulating valve is generally represented by a step number, and the step number is inversely proportional to the opening degree of the electric water regulating valve. Preferably, when the step number is adopted to represent the opening degree of the electric water regulating valve, if the opening degree of the electric water regulating valve is the maximum opening degree BmaxIf yes, the corresponding step number is 0; when the opening degree of the electric water regulating valve is the minimum opening degree BminThe corresponding maximum number of steps is usually different for different types of gas water heaters, 1300 steps are preferred for the maximum number of steps in the embodiment, and the opening degree of the electric water regulating valve is the preset opening degree threshold value B0In this embodiment, the reference L corresponds to 500 stepsminAnd minimum opening degree B of electric water regulating valveminCalculating the actual water flow rate LPractice ofEqual to the maximum heating water flow LmaxThe opening degree B required at the time is specifically: l isPractice of=（L0-Lmin）×（1300-B）/（1300-500）+LminDue to Lmin、L0And LPractice ofAre all known, so different actual water flows LPractice ofCorresponding to a corresponding required opening degree B, namely the step number, the actual water flow L can be calculatedPractice ofThe opening degree B required at the time is determined.
Further, in order to ensure the accuracy of the opening adjustment of the electric water regulating valve, when the actual outlet water temperature T is reachedGo outReach the preset water outlet temperature TPreset ofThen, the actual heat load P of the gas water heater is determined once every third time thresholdPractice ofBy the actual thermal load PPractice ofRated thermal load P0In the relation of (1), the opening degree of the electric water regulating valve is slightly adjustedAnd (6) adjusting.
The third time threshold is preset in advance in the database of the gas water heater control system, and is preferably 100 ms.
When the actual outlet water temperature TGo outReach the preset water outlet temperature TPreset ofThen, the actual water flow L of the hot water outlet pipe is collected once every 100msPractice ofActual water outlet temperature T of hot water outlet pipeGo outAnd the inlet water temperature T of the cold water inlet pipeIntoAnd according to PPractice of=LPractice of×（TGo out-TInto）/T0Calculating the actual heat load P of the current gas water heaterPractice of(ii) a Then passes the current actual heat load PPractice ofRated thermal load P0The relationship (2) is to finely adjust the opening of the electric water regulating valve.
Wherein T is0Represents the maximum temperature at which water with a water flow of 1L/min can be heated per 1KW of thermal load, wherein W3Is a value smaller than 1, which is a value preset in the database in advance. In the present embodiment, it is preferably 14 ℃.
In particular, how to depend on the actual thermal load PPractice ofRated thermal load P0The relationship (2) is to finely adjust the opening degree of the electric water regulating valve, and specifically comprises the following steps:
if the actual heat load PPractice ofSatisfies the following conditions: w2×P0≤PPractice of≤W1×P0Keeping the opening degree of the current electric water regulating valve unchanged, wherein 0 < W2＜W1＜1；
If the actual heat load PPractice ofSatisfies the following conditions: pPractice of＞W1×P0Then the opening degree of the electric water regulating valve is reduced until the actual heat load PPractice ofSatisfies the following conditions: w2×P0≤PPractice of≤W1×P0Until the end;
if the actual heat load PPractice ofSatisfies the following conditions: pPractice of＜W2×P0The opening degree of the electric water regulating valve is increased until the actual heat load PPractice ofSatisfies the following conditions: w2×P0≤PPractice of≤W1×P0Until now.
Specifically, if the opening of the electric water regulating valve is reduced, the opening is reduced to the minimum opening BminTime, actual heat load PPractice ofIt still cannot satisfy: w2×P0≤PPractice of≤W1×P0Stopping adjusting the electric water regulating valve to keep the electric water regulating valve at the minimum opening degree Bmin；
If the opening of the electric water regulating valve is increased, the opening is increased to the maximum opening BmaxTime, actual heat load PPractice ofIt still cannot satisfy: w2×P0≤PPractice of≤W1×P0Stopping adjusting the electric water regulating valve to keep the electric water regulating valve at the maximum opening degree Bmax。
Specifically, W190% -98%, W280 to 88 percent. W1Preferably 95%, W2Preferably 85%.
Further, according to the rated thermal load P0Presetting the water outlet temperature TPreset ofAnd the inlet water temperature T of the cold water inlet pipeIntoDetermining the maximum heating water flow L of the gas water heatermaxThe method specifically comprises the following steps:
W3×P0=Lmax×（Tpreset of-TInto）/T0Wherein T is0Represents the maximum temperature at which water with a water flow of 1L/min can be heated per 1KW of thermal load, wherein W3Is to ensure the calculated maximum heating water flow LmaxAccuracy of, 0 < W3＜1，W3Preferably 0.9.
Further, the actual heat load P of the gas water heaterPractice ofIs obtained by the following method:
acquiring actual outlet water temperature T of hot water outlet pipeGo outThe inlet water temperature T of the cold water inlet pipeIntoActual water flow L of hot water outlet pipePractice ofAccording to PPractice of=LPractice of×（TGo out-TInto）/T0Calculating the reality of the gas water heaterThermal load PPractice of(ii) a Wherein T is0Representing the maximum temperature, T, at which water can be heated at a water flow rate of 1L/min per 1KW of thermal load0Is data preset in advance in a database of a gas water heater control system, preferably 14 ℃.
The control method of the present embodiment is specifically described below with reference to fig. 2, and includes the following steps:
s11, starting the gas water heater, and presetting the water outlet temperature T by a userPreset ofWhen the gas water heater is started, the opening degree of the electric water regulating valve is a preset opening degree threshold value B0So that the initial water outlet flow L of the hot water outlet pipe is collected at the moment0；
S12, igniting and burning the burner of the gas water heater, and acquiring the actual outlet water temperature T of the hot water outlet pipe in real timeGo outThe inlet water temperature T of the cold water inlet pipeIntoAnd the current actual water flow L of the hot water outlet pipePractice of；
S13, according to the actual outlet water temperature T of the current hot water outlet pipeGo outThe inlet water temperature T of the cold water inlet pipeIntoAnd the actual water flow rate LPractice ofAccording to P, i.e. according toPractice of=LPractice of×（TGo out-TInto）/T0Calculating the actual heat load P of a gas water heaterPractice of，T0Preferably 14 ℃;
s14, judging the actual heat load P of the gas water heaterPractice ofWhether the rated thermal load P is reached0If yes, go to S15; if not, returning to S12;
s15, judging the actual outlet water temperature T of the hot water outlet pipeGo outWhether or not less than the preset water outlet temperature T of the userPreset ofIf so, according to the rated thermal load P0Presetting the water outlet temperature TPreset ofAnd the inlet water temperature T of the cold water inlet pipeIntoAccording to W3×P0=Lmax×（TPreset of-TInto）/T0Determining the maximum heating water flow L of the gas water heatermaxWherein W is3Preferably 0.9, T0Preferably 14 ℃; if not, return to S12
S21, judging the actual water flow L of the hot water outlet pipePractice ofWhether or not: actual water flow rate LPractice ofMaximum heating water flow LmaxIf yes, the electric water regulating valve maintains the current opening degree, and after the first time threshold value, the actual outlet water temperature TGo outReach the preset water outlet temperature TPreset of(ii) a If not, go to S22;
the first time threshold value is a middle time value preset in the control system of the gas water heater in advance, and is preferably any one value from 5s to 10 s;
s22, judging the maximum heating water flow LmaxWhether or not: l ismax＜LminIf so, adjusting the opening degree of the electric water regulating valve to the minimum opening degree; if not, according to LminAnd minimum opening degree B of electric water regulating valveminDetermining the actual water flow rate LPractice ofEqual to the maximum heating water flow LmaxThe required opening degree B of the required electric water regulating valve is directly adjusted to the required opening degree B;
wherein L isminWhen the electric water regulating valve is in the minimum opening, the minimum heating water flow threshold value of the gas water heater is a numerical value preset in a control system of the gas water heater in advance, and is preferably 5L/min;
wherein, according to LminAnd minimum opening degree B of electric water regulating valveminCalculating the actual water flow rate LPractice ofEqual to the maximum heating water flow LmaxThe opening degree B required at the time specifically includes:
Lpractice of=（L0-Lmin）×（Bmin-B）/（Bmin-B0）+LminWherein B is0Is a preset opening threshold value, L, of the electric water regulating valve0When the opening degree of the electric water regulating valve is a preset opening degree threshold value B0The collected initial water outlet flow of the hot water outlet pipe is obtained;
s231, when the actual outlet water temperature TGo outReach the preset water outlet temperature TPreset ofThen, collecting the actual water flow L of the hot water outlet pipe once every third time thresholdPractice ofThe outlet water temperature T of the hot water outlet pipeGo outAnd the inlet water temperature T of the cold water inlet pipeIntoAnd according to PPractice of=LPractice of×（TGo out-TInto）/T0Calculating the actual heat load P of the current gas water heaterPractice of；
S232, judging the actual heat load PPractice ofWhether or not: w2×P0≤PPractice of≤W1×P0If so, keeping the opening degree of the current electric water regulating valve unchanged; if not, performing S233;
s233, judging the actual heat load PPractice ofWhether or not: pPractice of＞W1×P0If yes, the opening degree of the electric water regulating valve is reduced until the actual heat load P is reachedPractice ofSatisfies the following conditions: w2×P0≤PPractice of≤W1×P0Until the end; if not, the opening degree of the electric water regulating valve is increased until the actual heat load PPractice ofSatisfies the following conditions: w2×P0≤PPractice of≤W1×P0Until the end; wherein 0 < W2＜W1< 1, preferably W1Is 0.95, W2Is 0.85.
In the description herein, the description of the terms "one embodiment," "some embodiments," "specific embodiments," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the described parent features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (11)
1. A control method for an electric water regulating valve of a gas water heater is characterized by comprising the following steps:
starting the gas water heater if the actual heat load P of the gas water heaterPractice ofReach the rated thermal load P0And the actual outlet water temperature T of the hot water outlet pipeGo outLower than the preset outlet water temperature T of the userPreset ofAccording to the rated thermal load P of the gas water heater0Presetting the water outlet temperature TPreset ofAnd the inlet water temperature T of the cold water inlet pipeIntoDetermining the maximum heating water flow L of the gas water heatermax；
If the actual water flow L of the hot water outlet pipePractice ofLess than or equal to the maximum heating water flow LmaxIf the current opening degree of the electric water regulating valve is maintained, after the first time threshold value, the actual outlet water temperature TGo outReach the preset water outlet temperature TPreset of；
If the actual water flow L of the hot water outlet pipePractice ofGreater than the maximum heating water flow LmaxIf so, adjusting the opening degree of the electric water regulating valve, and after a second time threshold value, actually outputting the water temperature TGo outReach the preset water outlet temperature TPreset of；
Wherein, if the actual water flow L of hot water outlet pipePractice ofGreater than the maximum heating water flow LmaxAdjusting the opening degree of the electric water regulating valve specifically comprises:
if the maximum heating water flow LmaxSatisfies the following conditions: l ismax＜LminIf so, adjusting the opening degree of the electric water regulating valve to the minimum opening degree;
if the maximum heating water flow LmaxSatisfies the following conditions: l ismax≥LminThen according to LminAnd a minimum opening degree B of the electric water regulating valveminCalculating the actual water flow rate LPractice ofEqual to the maximum heating water flow LmaxThe required opening degree B is obtained, and the electric water regulating valve is directly regulated to the required opening degree B;
wherein L isminAnd when the electric water regulating valve is in the minimum opening degree, the corresponding minimum heating water flow threshold value of the gas water heater is obtained.
2. The method for controlling an electric water-regulating valve of a gas water heater according to claim 1, wherein said L is a function ofminAnd a minimum opening degree B of the electric water regulating valveminCalculating the actual water flow rate LPractice ofEqual to the maximum heating water flow LmaxThe required opening degree B specifically includes:
Lpractice of=（L0-Lmin）×（Bmin-B）/（Bmin-B0）+LminWherein B is0Is a preset opening threshold value, L, of the electric water regulating valve0When the opening degree of the electric water regulating valve is a preset opening degree threshold value B0And the collected initial water outlet flow of the hot water outlet pipe.
3. The control method of the electric water regulating valve of the gas water heater according to claim 2, wherein the opening degree of the electric water regulating valve is represented by a step number, and the step number is inversely proportional to the opening degree of the electric water regulating valve.
4. The control method of the electric water regulating valve of the gas water heater according to claim 3, wherein if the opening degree of the electric water regulating valve is the maximum opening degree BmaxIf yes, the corresponding step number is 0; when the opening degree of the electric water regulating valve is the minimum opening degree BminThen, the maximum number of steps is corresponded.
5. The control method of the electric water regulating valve of the gas water heater according to claim 1, wherein when the actual outlet water temperature T is higher than the preset valueGo outReach the preset water outlet temperature TPreset ofThen, the actual heat load P of the gas water heater is determined once every third time thresholdPractice ofBy the actual thermal load PPractice ofRated thermal load P0To the electric water regulating valveAnd (5) fine adjustment of the opening degree.
6. The control method of the electric water regulating valve of the gas water heater according to claim 5, wherein the actual heat load P is the actual heat load PPractice ofSatisfies the following conditions: w2×P0≤PPractice of≤W1×P0Keeping the opening degree of the current electric water regulating valve unchanged, wherein 0 < W2＜W1＜1；
If the actual heat load PPractice ofSatisfies the following conditions: pPractice of＞W1×P0Then the opening degree of the electric water regulating valve is reduced until the actual heat load PPractice ofSatisfies the following conditions: w2×P0≤PPractice of≤W1×P0Until the end;
if the actual heat load PPractice ofSatisfies the following conditions: pPractice of＜W2×P0The opening degree of the electric water regulating valve is increased until the actual heat load PPractice ofSatisfies the following conditions: w2×P0≤PPractice of≤W1×P0Until now.
7. The control method of the electric water regulating valve of the gas water heater according to claim 6, wherein when the opening degree of the electric water regulating valve is reduced to the minimum opening degree B in the process of reducing the opening degree of the electric water regulating valve, the electric water regulating valve is controlled to the minimum opening degree BminTime, actual heat load PPractice ofIt still cannot satisfy: w2×P0≤PPractice of≤W1×P0Stopping adjusting the electric water regulating valve to keep the electric water regulating valve at the minimum opening degree Bmin；
If the opening of the electric water regulating valve is increased, when the opening is increased to the maximum opening BmaxTime, actual heat load PPractice ofIt still cannot satisfy: w2×P0≤PPractice of≤W1×P0Stopping adjusting the electric water regulating valve to keep the electric water regulating valve at the maximum opening degree Bmax。
8. According to the rightThe control method of an electric water regulating valve of a gas water heater according to claim 6, wherein W is190% -98% of the total weight of W280 to 88 percent.
9. Control method of an electric water-regulating valve of a gas water heater according to any of claims 1-8, characterized in that said control method is based on the rated thermal load P0Presetting the water outlet temperature TPreset ofAnd the inlet water temperature T of the cold water inlet pipeIntoDetermining the maximum heating water flow L of the gas water heatermaxThe method specifically comprises the following steps:
W3×P0=Lmax×（Tpreset of-TInto）/T0Wherein T is0Represents the maximum temperature at which water with a water flow of 1L/min can be heated per 1KW of thermal load, wherein 0 < W3＜1。
10. The control method of the electric water regulating valve of the gas water heater according to any one of claims 1 to 8, wherein after the gas water heater is shut down, the opening degree of the electric water regulating valve is restored to the preset opening degree threshold value B0。
11. Control method of an electric water-regulating valve of a gas water heater according to any of claims 1-8, characterized in that the actual thermal load P of the gas water heaterPractice ofIs obtained by the following method:
acquiring actual outlet water temperature T of hot water outlet pipeGo outThe inlet water temperature T of the cold water inlet pipeIntoActual water flow L of hot water outlet pipePractice ofAccording to PPractice of=LPractice of×（TGo out-TInto）/T0Calculating the actual heat load P of the gas water heaterPractice of(ii) a Wherein T is0Representing the maximum temperature at which water with a water flow of 1L/min can be heated per 1KW of thermal load.
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| CN113154692A (en) * | 2021-05-25 | 2021-07-23 | 华帝股份有限公司 | Constant temperature control method and device |
| CN113357829A (en) * | 2021-06-22 | 2021-09-07 | 海信(广东)厨卫系统股份有限公司 | Control method and device of water heater |
| CN114294817A (en) * | 2021-12-03 | 2022-04-08 | 华帝股份有限公司 | Electric water heater and control method thereof |
| CN114562819A (en) * | 2021-12-09 | 2022-05-31 | 浙江达峰科技有限公司 | Constant temperature control method for water heater |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59164842A (en) * | 1983-03-09 | 1984-09-18 | Hitachi Ltd | Hot water supplying apparatus |
| JP2830257B2 (en) * | 1989-12-28 | 1998-12-02 | 松下電器産業株式会社 | Water control device for water heater |
| JP2000018716A (en) * | 1998-06-24 | 2000-01-18 | Chofu Seisakusho Co Ltd | Hot-water supply system, its control method, and combination valve used for it |
| KR20030041364A (en) * | 2001-11-19 | 2003-05-27 | 주식회사 경동보일러 | Method for controling heating boiler by flow sensor |
| JP3859810B2 (en) * | 1997-04-30 | 2006-12-20 | 株式会社ガスター | Flow rate control device and hot water supply device |
| CN103727677A (en) * | 2014-01-02 | 2014-04-16 | 福州斯狄渢电热水器有限公司 | Instant heating type water heater constant temperature control system and method |
| JP2015132461A (en) * | 2013-12-12 | 2015-07-23 | 国立研究開発法人産業技術総合研究所 | Demand-supply management device on hot water supply, concentration information processing estimation planning device, and regional middle or long-period demand-supply management system on hot water supply |
| CN106288417A (en) * | 2016-08-31 | 2017-01-04 | 易维宾 | The double modulation of aqueous vapor rises the control method that gas heater leaving water temperature is preferential |
| CN107238191A (en) * | 2016-03-28 | 2017-10-10 | 青岛经济技术开发区海尔热水器有限公司 | The control method and gas heater of a kind of gas heater |
| CN107917534A (en) * | 2016-10-10 | 2018-04-17 | 青岛经济技术开发区海尔热水器有限公司 | A kind of current amount control method and gas heater |
| CN108286788A (en) * | 2017-01-10 | 2018-07-17 | 青岛经济技术开发区海尔热水器有限公司 | The control method and gas heater of the variable gas heater of heat production outlet capacity |
| JP2018200124A (en) * | 2017-05-25 | 2018-12-20 | 株式会社パロマ | Hot water supply device |
| CN111595030A (en) * | 2020-06-15 | 2020-08-28 | 珠海格力电器股份有限公司 | Gas water heater control method, device and system and gas water heater |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4416256A (en) * | 1980-03-06 | 1983-11-22 | S. W. Hart & Co. Pty. Ltd. | Solar water heaters |
| JPS57105645A (en) * | 1980-12-23 | 1982-07-01 | Matsushita Electric Ind Co Ltd | Instantaneous water boiler |
| US20100319790A1 (en) * | 2008-03-05 | 2010-12-23 | Franz-Josef Fleckner | Usable water usage device |
-
2020
- 2020-11-12 CN CN202011260453.XA patent/CN112484310B/en active Active
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS59164842A (en) * | 1983-03-09 | 1984-09-18 | Hitachi Ltd | Hot water supplying apparatus |
| JP2830257B2 (en) * | 1989-12-28 | 1998-12-02 | 松下電器産業株式会社 | Water control device for water heater |
| JP3859810B2 (en) * | 1997-04-30 | 2006-12-20 | 株式会社ガスター | Flow rate control device and hot water supply device |
| JP2000018716A (en) * | 1998-06-24 | 2000-01-18 | Chofu Seisakusho Co Ltd | Hot-water supply system, its control method, and combination valve used for it |
| KR20030041364A (en) * | 2001-11-19 | 2003-05-27 | 주식회사 경동보일러 | Method for controling heating boiler by flow sensor |
| JP2015132461A (en) * | 2013-12-12 | 2015-07-23 | 国立研究開発法人産業技術総合研究所 | Demand-supply management device on hot water supply, concentration information processing estimation planning device, and regional middle or long-period demand-supply management system on hot water supply |
| CN103727677A (en) * | 2014-01-02 | 2014-04-16 | 福州斯狄渢电热水器有限公司 | Instant heating type water heater constant temperature control system and method |
| CN107238191A (en) * | 2016-03-28 | 2017-10-10 | 青岛经济技术开发区海尔热水器有限公司 | The control method and gas heater of a kind of gas heater |
| CN106288417A (en) * | 2016-08-31 | 2017-01-04 | 易维宾 | The double modulation of aqueous vapor rises the control method that gas heater leaving water temperature is preferential |
| CN107917534A (en) * | 2016-10-10 | 2018-04-17 | 青岛经济技术开发区海尔热水器有限公司 | A kind of current amount control method and gas heater |
| CN108286788A (en) * | 2017-01-10 | 2018-07-17 | 青岛经济技术开发区海尔热水器有限公司 | The control method and gas heater of the variable gas heater of heat production outlet capacity |
| JP2018200124A (en) * | 2017-05-25 | 2018-12-20 | 株式会社パロマ | Hot water supply device |
| CN111595030A (en) * | 2020-06-15 | 2020-08-28 | 珠海格力电器股份有限公司 | Gas water heater control method, device and system and gas water heater |
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