CN112283954B - Water heater outlet water temperature compensation method and water heater - Google Patents
Water heater outlet water temperature compensation method and water heater Download PDFInfo
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- CN112283954B CN112283954B CN202011138988.XA CN202011138988A CN112283954B CN 112283954 B CN112283954 B CN 112283954B CN 202011138988 A CN202011138988 A CN 202011138988A CN 112283954 B CN112283954 B CN 112283954B
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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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Abstract
The invention discloses a water heater outlet water temperature compensation method and a water heater, comprising the following steps: s1: acquiring required temperature and water delivery change influence parameters; s2: calculating the preheating temperature and the preheating time according to the required temperature and the water delivery change influence parameters; s3: and controlling the outlet water temperature according to the preheating temperature and the preheating time. According to demand temperature and water delivery temperature change influence parameter, calculate and obtain suitable preheating temperature and preheating time, then control leaving water temperature according to preheating temperature and preheating time, make when initial water passing, the leaving water temperature of water heater tends to preheating temperature and lasts preheating time, preheating temperature is higher than demand temperature, make the hot water of water heater output carry more heat, in order to compensate pipeline absorbed partial heat, can make pipeline temperature rise fast, shorten the time that the water temperature accords with demand temperature, be favorable to realizing the effect of the difference in temperature between quick reduction water temperature and the demand temperature.
Description
Technical Field
The invention relates to the field of water heaters, in particular to a water outlet temperature compensation method for a water heater and the water heater.
Background
Along with the increase of economy and the improvement of living standard, the water heater has become the conventional equipment of every family, and current water heater can be through detecting the play water temperature of water outlet port to adjust according to the play water temperature, make the play water temperature accord with the demand temperature that the user set for, it is more convenient to use.
However, referring to fig. 1 and 2, due to the reason that the pipeline from the water heater to the water consumption point is long or the ambient temperature around the pipeline is low, when water is just started to be used, partial heat of the hot water is used for heating the pipeline, so that the difference between the water consumption temperature of the water consumption point and the water outlet temperature is large, and the water temperature can be waited for a period of time after water is passed to be used normally, which causes the problems of water resource waste and troublesome use.
In the prior art, a temperature sensor is arranged near a water consumption point of a part of water heaters and is used for detecting the water consumption temperature of the water consumption point, and the water heaters adjust the water outlet temperature according to the detection temperature value fed back by the temperature sensor, so that the rising time of the water consumption temperature is shortened. However, this method has a feedback adjustment process, and although it can shorten the time required for the water temperature to rise, it is difficult to quickly eliminate the temperature difference between the outlet water temperature and the water temperature in a short time, and there is a possibility that the water temperature will be too hot after rising, and it requires feedback adjustment many times to make the water temperature meet the set outlet water temperature, resulting in troublesome control and use and increased material cost.
Disclosure of Invention
The present invention is directed to solving at least one of the problems of the prior art. Therefore, the invention provides a water outlet temperature compensation method for a water heater, which can quickly reduce the temperature difference between the water temperature of the water using point and the set required temperature of the water heater when water is initially supplied.
The invention also provides the water heater, which can perform temperature compensation during initial water supply so as to enable the water temperature of the water consumption point to quickly meet the preset required temperature.
The water heater outlet water temperature compensation method according to the embodiment of the first aspect of the invention comprises the following steps:
s1: acquiring required temperature and water delivery change influence parameters;
s2: calculating the preheating temperature and the preheating time according to the required temperature and the water delivery change influence parameters;
s3: and controlling the outlet water temperature according to the preheating temperature and the preheating time.
The water outlet temperature compensation method of the water heater provided by the embodiment of the invention at least has the following beneficial effects: according to the change influence parameters of the demand temperature and the water delivery temperature, the appropriate preheating temperature and preheating time are calculated, then the water outlet temperature is controlled according to the preheating temperature and the preheating time, so that when water is initially supplied, the water outlet temperature of the water heater tends to the preheating temperature and lasts for the preheating time, the preheating temperature is higher than the demand temperature, more heat is carried by hot water output by the water heater, partial heat absorbed by a pipeline is compensated, the pipeline temperature can be quickly increased, and the time that the water temperature meets the demand temperature is shortened. With this need not to rely on the sensor to detect the water temperature of water consumption point far away and carry out feedback control, be favorable to realizing the effect of the difference in temperature between water temperature and the demand temperature that reduces fast, it is more convenient to make the use.
According to some embodiments of the invention, the water delivery variation influencing parameter comprises one or more of a combination of inlet water temperature, ambient temperature, pipe length, pipe diameter, and water flow rate.
According to some embodiments of the invention, in step S2, a preheating temperature is calculated according to the demand temperature, the intake water temperature, and the ambient temperature, and a preheating time is calculated according to the pipe length, the pipe diameter, and the water flow rate.
According to some embodiments of the invention, the preheating temperature is calculated by the following formula:
Tpreheating＝TDemand for+A·ln(20-TEnvironment(s) of)·(TDemand for-TInflow water)
Wherein T isPreheatingFor preheating temperature, A is the body parameter, TEnvironment(s)Is ambient temperature, TDemand forTo the required temperature, TInflow waterThe temperature of the inlet water is shown.
According to some embodiments of the invention, the preheating time is calculated by the following formula:
wherein t isPreheatingFor preheat time, K is the engine parameters, L is the length of the pipeline, d is the diameter of the pipeline, and Q is the water flow.
According to some embodiments of the invention, the difference between the preheating temperature and the required temperature is less than or equal to a preset temperature difference threshold, and the preheating time is less than or equal to a preset time threshold.
According to some embodiments of the invention, before step S3, further comprising step S21: and judging whether the pipeline length is greater than or equal to the length threshold, the difference value between the required temperature and the inlet water temperature is greater than or equal to the first temperature threshold and the ambient temperature is less than or equal to the second temperature threshold, if so, executing the step S3, otherwise, not executing the step S3.
According to some embodiments of the invention, the length threshold is 10 meters, the first temperature threshold is 15 ℃ and the second temperature threshold is 20 ℃.
According to a second aspect of the invention, the water heater comprises: the water heater water outlet temperature compensation method comprises a machine body, wherein a control module, a heating module, a water inlet temperature sensor, a water outlet temperature sensor, an environment temperature sensor and a water flow sensor are arranged on the machine body, and the heating module, the water inlet temperature sensor, the water outlet temperature sensor, the environment temperature sensor and the water flow sensor are all electrically connected with the control module.
The water heater provided by the embodiment of the invention at least has the following beneficial effects: when the water heater is installed, an installer inputs the length and the diameter of a pipeline in an actual use environment into the control module, detects and obtains the water inlet temperature through the water inlet temperature sensor, detects and obtains the environment temperature through the environment temperature sensor and detects and obtains the water flow through the water flow sensor, the control module combines the preset required temperature, calculates the preheating temperature and the preheating time according to the formula, then controls the heating module to work, obtains the detected and obtained water outlet temperature through the water outlet temperature sensor, so that the water outlet temperature tends to the preheating temperature and maintains the preheating time, the effect of quickly reducing the temperature difference between the water temperature and the required temperature is realized, a temperature sensor is not required to be arranged at the water point, the cost of an object is saved, the feedback adjustment is not required according to the water point temperature, and the time for the water temperature to rise to meet the use requirement is shorter, the use is more convenient.
According to some embodiments of the invention, the mobile terminal further comprises an operation display module arranged on the body and electrically connected with the control module.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic view showing a relationship between a water usage distance and a water temperature at the time of initial water supply;
FIG. 2 is a schematic view showing a water temperature change curve of a water consumption point at the initial water supply in a conventional manner;
FIG. 3 is a block flow diagram of one embodiment of the present invention;
FIG. 4 is a graph illustrating the variation of the outlet water temperature during the initial water supply according to one embodiment of the present invention;
FIG. 5 is a graph comparing a water temperature change curve according to an embodiment of the present invention with a water temperature change curve according to a conventional method;
fig. 6 is a schematic structural diagram of an embodiment of the present invention.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, if there are first and second described only for the purpose of distinguishing technical features, it is not understood that relative importance is indicated or implied or that the number of indicated technical features or the precedence of the indicated technical features is implicitly indicated or implied.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.
As shown in fig. 3, the method for compensating the outlet water temperature of the water heater according to the embodiment of the invention includes the following steps:
s1: acquiring required temperature and water delivery change influence parameters;
S2: calculating the preheating temperature and the preheating time according to the required temperature and the water delivery change influence parameters;
s3: and controlling the outlet water temperature according to the preheating temperature and the preheating time.
Referring to fig. 3 to 5, according to the required temperature and the water delivery temperature change influence parameter, calculating to obtain a proper preheating temperature and preheating time, and then controlling the outlet water temperature according to the preheating temperature and the preheating time, so that when water is initially supplied, the outlet water temperature of the water heater tends to the preheating temperature and continues the preheating time, the preheating temperature is higher than the required temperature, so that the hot water output by the water heater carries more heat, compensates for part of heat absorbed by the pipeline, can quickly raise the pipeline temperature, and shortens the time for the water temperature to meet the required temperature. With this need not to rely on the sensor to detect the water temperature of water consumption point far away and carry out feedback control, be favorable to realizing the effect of the difference in temperature between water temperature and the demand temperature that reduces fast, it is more convenient to make the use.
In some embodiments of the invention, the water delivery change affecting parameter comprises one or more of a combination of inlet water temperature, ambient temperature, pipe length, pipe diameter, and water flow rate.
In the process of pipeline water delivery, the final water temperature of a water using point is influenced by the required temperature, the pipeline parameters, the water inlet temperature, the environment temperature and the water flow, therefore, the preheating temperature and the preheating time are calculated according to the parameters, when the water heater initially passes water, the water outlet temperature tends to the preheating temperature, so that hot water output by the water heater carries more heat to quickly heat the pipeline, the pipeline absorbs partial heat, the water temperature of the water using position is not higher than the required temperature, after the preheating time is continued, the pipeline is fully heated, the water outlet temperature tends to the required temperature, and the condition that the water temperature is overhigh is avoided. With this, obtain and calculate according to demand temperature, pipeline parameter, water inlet temperature, ambient temperature and discharge and obtain preheating temperature and preheating time, reasonable in design and fully consider the parameter that influences the water temperature, be favorable to realizing the purpose of the difference in temperature between quick reduction water temperature and the demand temperature.
In the process that the water heater outputs hot water to a water consumption point, the water heater can only control the temperature and the maintaining time of the output hot water, and the water flow is controlled by a user of the water consumption point. The preheating temperature and the preheating time are obtained through calculation, so that the outlet water temperature of the water heater tends to the preheating temperature and is kept for the preheating time, the pipeline is heated for a proper time at a proper high temperature, and the temperature of the pipeline is increased as soon as possible.
Referring to fig. 3, in some embodiments of the present invention, in step S2, a preheating temperature is calculated according to a demand temperature, an intake water temperature, and an ambient temperature, and a preheating time is calculated according to a pipe length, a pipe diameter, and a water flow rate.
The water heater can control two variables of the water outlet temperature and the holding time, the preheating temperature is calculated according to the demand temperature, the water inlet temperature and the environment temperature, the water heater controls the water outlet temperature according to the preheating temperature, the preheating time is calculated according to the length of the pipeline, the diameter of the pipeline and the water flow, the duration time is controlled according to the preheating time, the preheating temperature and the preheating time are calculated respectively, the demand values of the two variables do not need to be calculated in the same calculation model at the same time, and the simplification of analysis and the establishment of the calculation model are facilitated.
Through in the experimental stage, referring to fig. 6, the experimental model of the water heater includes a machine body 100 and a pipeline, the machine body 100 is provided with a control module 110, and a heating module 120, an inlet water temperature sensor 130, an outlet water temperature sensor 140, an ambient temperature sensor 150 and a water flow sensor 160 which are all electrically connected to the control module 110, and the experimental model of the water heater is respectively divided into groups to perform the experiment according to the following conditions:
1) Setting a constant value: ambient temperature TEnvironment(s)Temperature T of inlet waterInflow waterRequired temperature TDemand forWater flow rate Q, pipeline length L andand the diameter d of the pipeline; measuring the temperature T of the waterUsing waterCurve h as a function of time0As a blank control group;
2) changing the water inlet temperature T on the basis of a blank control groupInflow waterAnd the required temperature TDemand forLet the required temperature TDemand forAnd the temperature T of the inlet waterInflow waterHas a temperature difference of Δ T1、ΔT2、ΔT3… …, obtaining water temperature curves h of each group under different temperature differences1；
3) Changing the ambient temperature T on the basis of the blank control groupEnvironment(s)Let the ambient temperature be TEnvironment 1、TEnvironment 2、TEnvironment 3… …, obtaining different ambient temperatures TEnvironment(s)Water temperature curves h for the lower groups2；
4) On the basis of the blank control group, the length L of the pipeline is changed to be L1、L2、L3… …, obtaining water temperature curves h of different groups under different pipeline lengths L3；
5) On the basis of the blank control group, changing the diameter d of the pipeline to make the diameter d of the pipeline be d1、d2、d3… …, obtaining water temperature curves h of different groups under different pipeline diameters d4；
6) Changing water flow Q on the basis of the blank control group to make the water flow Q be Q1、 Q2、Q3… …, obtaining water temperature curves h of each group under different water flows Q 5。
Measuring the water temperature curve by controlling the variable according to the water temperature curve h0、h1、h2、h3、h4、h5Fitting and modeling are carried out to form a multivariate function, a water temperature curve is recorded as h, and the function h is related to the environment temperature TEnvironment(s) ofTemperature T of inlet waterInflow waterRequired temperature TDemand forA water flow Q, a line length L and a line diameter d.
To use the water temperature TUsing waterMeet the demand temperature T more quicklyDemand forAt the beginningIncreasing preheating process when water is introduced, and setting different preheating temperatures T based on water temperature curve hPreheatingAnd a preheating time tPreheatingPreheating temperature TPreheatingThe demand temperature T, which can be understood as a temporary increaseDemand forTo the temperature T of the water for drinkingUsing waterQuickly approaching to preset required temperature TDemand for。
By at different ambient temperatures TEnvironment(s)Temperature T of inlet waterInflow waterRequired temperature TDemand forThe different preheating temperatures T are tested by a plurality of experiments under the conditions of water flow Q, pipeline length L and pipeline diameter dPreheatingAnd preheating time tPreheatingFinally at a reasonable preheating temperature TPreheatingAnd a preheating time tPreheatingUnder the condition, the data point group with the shortest temperature rise time is obtained, and the following tables 1 and 2 are the numerical values of part of the data points, wherein the overshoot temperature delta T Overshoot＝TPreheating- TDemand for：
Table 1: relationship between overshoot temperature and demand, intake and ambient temperatures
Table 2: relationship between preheating time and pipeline length, pipeline diameter and water flow
| Length L (m) | Diameter d (m) | Water flow Q (L/s) | Preheating time t(s) |
| 5 | 0.010 | 0.067 | 1.65 |
| 5 | 0.010 | 0.100 | 1.10 |
| 15 | 0.010 | 0.067 | 4.95 |
| 15 | 0.010 | 0.067 | 4.93 |
| 15 | 0.015 | 0.100 | 7.43 |
| 15 | 0.015 | 0.133 | 5.57 |
| 20 | 0.010 | 0.067 | 6.57 |
| 20 | 0.010 | 0.100 | 4.40 |
| 20 | 0.015 | 0.133 | 7.43 |
| 20 | 0.015 | 0.167 | 5.94 |
| 30 | 0.010 | 0.133 | 4.95 |
| 30 | 0.015 | 0.167 | 8.91 |
According to the numerical points obtained by the experiment, modeling fitting is carried out to obtain a calculation formula model, namely an empirical formula is obtained, wherein the overshoot temperature delta TOvershootCalculated by the following formula:
ΔTovershoot＝A·ln(20-TEnvironment(s))·(TDemand for-TInflow water)
Wherein Δ TOvershootFor overshoot temperature, A is the body parameter, TEnvironment(s)Is ambient temperature, TDemand forTo the required temperature, TInflow waterThe temperature of the inlet water is shown. Calculating preheating time t by using pipeline diameter d and water flow QPreheating。
Preheating temperature TPreheatingFrom the overshoot temperature Δ TOvershoot＝TPreheating-TDemand forIn combination with the above formula can be expressed as:
Tpreheating＝TDemand for+A·ln(20-TEnvironment(s))·(TDemand for-TInflow water)
TPreheatingIs the preheat temperature. By the empirical formula, the temperature can be determined according to the ambient temperature TEnvironment(s)Required temperature TDemand forAnd the temperature T of the inlet waterInflow waterCalculating to obtain proper preheating temperature TPreheating。
In addition, the preheating time tPreheatingCalculated by the following formula:
wherein t isPreheatingFor preheat time, K is the engine parameters, L is the length of the pipeline, d is the diameter of the pipeline, and Q is the water flow. With the empirical formula, the proper preheating time t can be calculated according to the length L of the pipeline, the diameter d of the pipeline and the water flow Q Preheating。
The machine body parameter a and the machine body parameter K are determined by the structure of the actual water heater itself, for example, the machine body parameter a is 0.06, and the machine body parameter K is 220, and are determined in the production test stage of the water heater product, and are burned in the control module 110 when leaving the factory.
In some embodiments of the invention, the preheat temperature TPreheatingAnd the required temperature TDemand forIs less than or equal to a preset temperature difference threshold value, and the preheating time tPreheatingLess than or equal to a preset time threshold.
To avoid the situation that the user is scalded by overhigh water temperature, the preheating temperature TPreheatingAnd the required temperature TDemand forIs less than or equal to the preset temperature difference threshold value, namely the overshoot temperature is less than or equal to the preset temperature difference threshold value, and the preheating time tPreheatingLess than or equal to a preset time threshold.
The preset temperature difference threshold may be +8 deg.C or above, preferably the preset temperature difference threshold is +At 8 ℃ i.e. TPreheating≤TDemand for+8 ℃. The value range of the preset time threshold value can be [10,60 ]]Second, preferably the preset time threshold is 20 seconds, tPreheating≤20s。
When the overshoot temperature is over +8 ℃ calculated according to the formula, the overshoot temperature is +8 ℃, and the preheating time t is calculated according to the formulaPreheatingPreheating time t exceeding 20 seconds PreheatingThe time is 20 seconds, so that the scald of a user is favorably prevented, and the safety and the reliability are improved.
Referring to fig. 3, in some embodiments of the invention, before step S3, step S21 is further included: judging whether the pipeline length L is more than or equal to the length threshold value and the required temperature T are simultaneously metDemand forAnd the temperature T of the inlet waterInflow waterIs greater than or equal to the first temperature threshold and the ambient temperature TEnvironment(s)Less than or equal to the second temperature threshold, if both are satisfied, go to step S3, otherwise go to step S3.
For certain conditions of use, e.g. too short a line length L, required temperature TDemand forAnd the temperature T of the inlet waterInflow waterSmall difference value delta T and environment temperature TEnvironment(s)Under the conditions of higher temperature and the like, preheating treatment is not needed, so that the control is more convenient. Therefore, by setting the length threshold value of the pipeline, the required temperature TDemand forAnd the temperature T of the inlet waterInflow waterFirst temperature threshold of difference Δ T, ambient temperature TEnvironment(s)The second temperature threshold value is used, so that preheating treatment is carried out when the threshold value condition is met, different use environments are conveniently met, and use requirements are met.
Referring to fig. 3, in some embodiments of the invention, it is preferred that the length threshold is 10 meters, the first temperature threshold is 15 deg.c and the second temperature threshold is 20 deg.c, depending on the experimental circumstances.
Referring to fig. 6, a water heater according to an embodiment of the second aspect of the present invention includes: the water heater water outlet temperature compensation method includes a machine body 100, wherein the machine body 100 is provided with a control module 110, and a heating module 120, an inlet water temperature sensor 130, an outlet water temperature sensor 140, an ambient temperature sensor 150 and a water flow sensor 160 which are all electrically connected to the control module 110, and the control module 110 can execute the water heater water outlet temperature compensation method.
When the water heater is installed, an installer inputs the length L and the diameter d of the pipeline in the actual use environment into the control module 110, and detects and acquires the inlet water temperature T through the inlet water temperature sensor 130Inflow waterThe ambient temperature sensor 150 detects and obtains the ambient temperature TEnvironment(s)And the water flow sensor 160 detects and obtains the water flow Q, and the control module 110 combines the preset required temperature TDemand forCalculating the preheating temperature T according to a formulaPreheatingAnd a preheating time tPreheatingThen the control module 110 controls the heating module 120 to work, and obtains the outlet water temperature T through the outlet water temperature sensor 140Discharging waterSo as to ensure the outlet water temperature TDischarging waterToward the preheating temperature TPreheatingMaintaining the preheating time tPreheatingThereby realizing the rapid reduction of the water temperature T Using waterAnd the required temperature TDemand forThe effect of the difference in temperature need not to set up temperature sensor at the water spot, is favorable to practicing thrift the article cost to need not to carry out feedback adjustment according to water spot temperature, the temperature rises and accords with the user demand dead time shorter, and it is more convenient to make the use.
The control module 110 may be a device including a single chip, an embedded processing chip, etc. capable of receiving, processing and transmitting signal data. The heating module 120 may include a gas valve and an embodiment of a burner, and the control module 110 controls the combustion condition of the burner by controlling the opening degree of the gas valve, so as to control the leaving water temperature TDischarging waterThe effect of (1).
Referring to fig. 6, in some embodiments of the present invention, an operation display module 170 disposed on the body 100 and electrically connected to the control module 110 is further included.
Through the setting, the operation display module 170 is arranged, so that a user can know the current working state of the water heater conveniently, and the user can set the required temperature T convenientlyDemand forMeanwhile, the pipeline length L and the pipeline diameter d can be input by an installer conveniently according to the actual use environment, so that the pipeline is more convenient to use.
The operation display module 170 may be an embodiment including a key set and a liquid crystal display, and may also be an embodiment including a touch screen.
Referring to fig. 3, the water heater has set the body parameter a and the body parameter K when leaving the factory, and the installer sets the length L of the pipeline and the diameter d of the pipeline according to the use environment when installing the water heater. During actual use, the actual work flow of the water heater is as follows: when energized, the ambient temperature sensor 150 detects the ambient temperature TEnvironment(s)And transmitted to the control module 110; when the user uses water, the control module 110 controls the heating module 120 to start working; the inlet water temperature sensor 130 detects the inlet water temperature TInflow waterAnd transmits the temperature to the control module 110, and the control module 110 calculates the preheating temperature TPreheating(ii) a The water flow sensor 160 detects the water flow Q and transmits the detected water flow Q to the control module 110, and the control module 110 calculates the preheating time tPreheating(ii) a Judging whether the pipeline length L is more than or equal to the length threshold value of 10 meters and the required temperature T are met simultaneouslyDemand forAnd the temperature T of the inlet waterInflow waterThe difference Delta T is greater than or equal to a first temperature threshold value of 15 ℃ and the ambient temperature TEnvironment(s)Less than or equal to a second temperature threshold of 20 ℃; if the threshold condition is satisfied, the control module 110 controls the heating module 120 to cooperate with the outlet water temperature sensor 140 to control the outlet water temperature TDischarging waterTends to the preheating temperature TPreheatingAnd maintains the preheating time t PreheatingAt a preheating time tPreheatingAfter that, let the water outlet temperature TDischarging waterTrend toward the required temperature TDemand for(ii) a If the threshold condition is not satisfied at the same time, the control module 110 does not execute the preheating operation, and the control module 110 controls the heating module 120 to cooperate with the outlet water temperature sensor 140 to make the outlet water temperature TDischarging waterNormal trend required temperature TDemand for。
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The invention is not limited to the above embodiments, and those skilled in the art can make equivalent modifications or substitutions without departing from the spirit of the invention, and such equivalent modifications or substitutions are included in the scope defined by the claims of the present application.
Claims (5)
1. The water outlet temperature compensation method of the water heater is characterized by comprising the following steps:
s1: acquiring required temperature and water delivery change influence parameters;
s2: calculating the preheating temperature and the preheating time according to the required temperature and the water delivery change influence parameters;
S3: controlling the outlet water temperature according to the preheating temperature and the preheating time;
the water delivery change influence parameters comprise one or more combinations of water inlet temperature, environment temperature, pipeline length, pipeline diameter and water flow;
in step S2, calculating a preheating temperature from the demand temperature, the intake water temperature, and the ambient temperature, and calculating a preheating time from the pipe length, the pipe diameter, and the water flow rate;
in step S3, according to the preheating temperature and the preheating time, making the outlet water temperature approach the preheating temperature and continue the preheating time;
the preheating temperature is calculated by the following formula:
Tpreheating＝TDemand for+A·ln(20-TEnvironment(s))·(TDemand for-TInflow water)
Wherein T isPreheatingFor preheating temperature, A is the body parameter, TEnvironment(s)Is ambient temperature, TDemand forTo the required temperature, TInflow waterThe temperature of the inlet water is set;
the preheating time is calculated by the following formula:
wherein t isPreheatingPreheating time, K is an engine body parameter, L is a pipeline length, d is a pipeline diameter, and Q is water flow;
the difference value between the preheating temperature and the required temperature is smaller than or equal to a preset temperature difference threshold value, and the preheating time is smaller than or equal to a preset time threshold value.
2. The outlet water temperature compensation method for the water heater as claimed in claim 1, further comprising step S21 before step S3: and judging whether the pipeline length is greater than or equal to the length threshold, the difference value between the required temperature and the inlet water temperature is greater than or equal to the first temperature threshold and the ambient temperature is less than or equal to the second temperature threshold, if so, executing the step S3, otherwise, not executing the step S3.
3. The water heater outlet water temperature compensation method according to claim 2, characterized in that: the length threshold value is 10 meters, the first temperature threshold value is 15 ℃, and the second temperature threshold value is 20 ℃.
4. A water heater, characterized in that includes: the water heater outlet temperature compensation method comprises a machine body (100), wherein a control module (110), a heating module (120), an inlet water temperature sensor (130), an outlet water temperature sensor (140), an ambient temperature sensor (150) and a water flow sensor (160) are arranged on the machine body (100), and the heating module, the inlet water temperature sensor (130), the outlet water temperature sensor (140), the ambient temperature sensor (150) and the water flow sensor (160) are all electrically connected with the control module (110), and the control module (110) can execute the water heater outlet temperature compensation method according to any one of claims 1 to 3.
5. The water heater according to claim 4, wherein: the device also comprises an operation display module (170) which is arranged on the machine body (100) and is electrically connected with the control module (110).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011138988.XA CN112283954B (en) | 2020-10-22 | 2020-10-22 | Water heater outlet water temperature compensation method and water heater |
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| CN202011138988.XA CN112283954B (en) | 2020-10-22 | 2020-10-22 | Water heater outlet water temperature compensation method and water heater |
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| CN112283954A CN112283954A (en) | 2021-01-29 |
| CN112283954B true CN112283954B (en) | 2022-06-28 |
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