CN111928486A - Heat pump water heater and electricity saving amount determining method and device thereof and storage medium - Google Patents
Heat pump water heater and electricity saving amount determining method and device thereof and storage medium Download PDFInfo
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- CN111928486A CN111928486A CN202010697701.0A CN202010697701A CN111928486A CN 111928486 A CN111928486 A CN 111928486A CN 202010697701 A CN202010697701 A CN 202010697701A CN 111928486 A CN111928486 A CN 111928486A
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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
Abstract
The invention provides a heat pump water heater and a method, a device and a storage medium for determining the electricity saving amount thereof, wherein the method comprises the following steps: acquiring the operating parameters of the heat pump water heater; determining the heating capacity and the power consumption of the heat pump water heater according to the operation parameters; and determining the electricity saving amount of the heat pump water heater according to the heating amount and the electricity consumption. The scheme provided by the invention can enable the calculation of the power consumption and the power saving amount to be more accurate.
Description
Technical Field
The invention relates to the field of control, in particular to a heat pump water heater, a method and a device for determining the electricity saving amount of the heat pump water heater, and a storage medium.
Background
The existing heat pump water heater calculates the electricity saving quantity of the water heater by fitting into a function only related to the outdoor environment temperature and the heating time length according to the laboratory capacity energy efficiency calculation data. But the electricity-saving quantity is not accurately calculated due to the fact that the coolant quantity deviation, the production consistency difference of the two devices, the voltage and current fluctuation and other conditions caused by the length of the connecting pipe in the actual unit assembling process are different from the laboratory test conditions.
Disclosure of Invention
The invention mainly aims to overcome the defects of the prior art and provides a heat pump water heater, a power saving amount determining method and device thereof and a storage medium, so as to solve the problem that the power saving amount of the heat pump water heater in the prior art is inaccurate to calculate.
The invention provides a method for determining the electricity saving amount of a heat pump water heater, which comprises the following steps: acquiring the operating parameters of the heat pump water heater; determining the heating capacity and the power consumption of the heat pump water heater according to the operation parameters; and determining the electricity saving amount of the heat pump water heater according to the heating amount and the electricity consumption.
Optionally, the operating parameters include: the heat pump water heater comprises a water tank initial temperature at the time of starting up the heat pump water heater, a water tank termination temperature at the time of shutting down the heat pump water heater, an accumulated water flow, an accumulated water inlet temperature and an accumulated water outlet temperature when water in the water tank of the heat pump water heater is used; obtaining the operating parameters of the heat pump water heater, including: acquiring the detection temperature of each temperature sensing bulb of the water tank at the time of starting the heat pump water heater, determining the initial temperature of the water tank according to the detection temperature of each temperature sensing bulb of the water tank at the time of starting, acquiring the detection temperature of each temperature sensing bulb of the water tank at the time of shutdown of the heat pump water heater, and determining the termination temperature of the water tank according to the detection temperature of each temperature sensing bulb of the water tank at the time of shutdown; and/or when the water in the water tank of the heat pump water heater is used, accumulating the flow values which are larger than a preset flow threshold value in the detected flow values to obtain the accumulated water flow; and/or when water in the water tank of the heat pump water heater is used, accumulating the water inlet temperature and the water outlet temperature of the water tank to obtain the accumulated water inlet temperature and the accumulated water outlet temperature of the water tank.
Optionally, determining the heating capacity of the heat pump water heater according to the operation parameter includes: calculating the heating quantity Q of the heat pump water heater according to the following formula:
Q＝k1·C[M(Tterminate-TInitial)+q·t1(TGo out-TInto)/n] (1)
Wherein k1 is a first correction coefficient, C is the specific heat capacity of water, M is the water capacity of the water tank, and T isInitialIs the initial temperature of the water tank, TTerminateIs the tank end temperature, q is the cumulative water flow, TIntoFor integrating the temperature of the feed water, TGo outTo accumulate the outlet water temperature, t1 is the detection interval time of the water flow, and n is the accumulated detection times of the inlet water temperature and the outlet water temperature.
Optionally, the operating parameters include: the accumulated power of the heat pump water heater during operation; determining the power consumption of the heat pump water heater according to the operation parameters, comprising: calculating the power consumption W of the heat pump water heater according to the following formula:
W＝k2·p·t2 (2)
wherein k2 is a second correction coefficient, p is the accumulated power when the heat pump water heater operates, and t2 is the detection interval time of the power;
optionally, the method further comprises: when the heat pump water heater is in standby, calculating the power consumption W of the heat pump water heater according to the following formula:
W＝k2·p·t2+k3·pstandbytStandby+θ (3)
Wherein k2 is a second correction coefficient, p is the accumulated power when the heat pump water heater operates, t2 is the detection interval time of the power, k3 is a third correction coefficient, pStandbyFor the heat pump water heater stand-by power, tStandbyThe time length of the standby mode is theta, and theta is a correction coefficient and can be obtained through experiments.
In another aspect, the present invention provides an electricity saving amount determining apparatus for a heat pump water heater, including: the acquisition unit is used for acquiring the operating parameters of the heat pump water heater; the first determining unit is used for determining the heating capacity and the power consumption of the heat pump water heater according to the operation parameters; and the second determining unit is used for determining the electricity saving amount of the heat pump water heater according to the heating amount and the electricity consumption.
Optionally, the operating parameters include: the heat pump water heater comprises a water tank initial temperature at the time of starting up the heat pump water heater, a water tank termination temperature at the time of shutting down the heat pump water heater, an accumulated water flow, an accumulated water inlet temperature and an accumulated water outlet temperature when water in the water tank of the heat pump water heater is used; the obtaining unit obtains the operating parameters of the heat pump water heater, and comprises: acquiring the detection temperature of each temperature sensing bulb of the water tank at the time of starting the heat pump water heater, determining the initial temperature of the water tank according to the detection temperature of each temperature sensing bulb of the water tank at the time of starting, acquiring the detection temperature of each temperature sensing bulb of the water tank at the time of shutdown of the heat pump water heater, and determining the termination temperature of the water tank according to the detection temperature of each temperature sensing bulb of the water tank at the time of shutdown; and/or when the water in the water tank of the heat pump water heater is used, accumulating the flow values which are larger than a preset flow threshold value in the detected flow values to obtain the accumulated water flow; and/or when water in the water tank of the heat pump water heater is used, accumulating the water inlet temperature and the water outlet temperature of the water tank to obtain the accumulated water inlet temperature and the accumulated water outlet temperature of the water tank.
Optionally, the first determining unit, which determines the heating capacity of the heat pump water heater according to the operating parameter, includes: calculating the heating quantity Q of the heat pump water heater according to the following formula:
Q＝k1·C[M(Tterminate-TInitial)+q·t1(TGo out-TInto)/n] (1)
Wherein k1 is a first correction coefficient, C is the specific heat capacity of water, M is the water capacity of the water tank, TAITION is the initial temperature of the water tankTerminateIs the tank end temperature, q is the cumulative water flow, TIntoFor integrating the temperature of the feed water, TGo outTo accumulate the outlet water temperature, t1 is the detection interval time of the water flow, and n is the accumulated detection times of the inlet water temperature and the outlet water temperature.
Optionally, the operating parameters include: the accumulated power of the heat pump water heater during operation; the first determining unit determines the power consumption of the heat pump water heater according to the operation parameters, and comprises the following steps: calculating the power consumption W of the heat pump water heater according to the following formula:
W＝k2·p·t2 (2)
and k2 is a second correction coefficient, p is the accumulated power when the heat pump water heater operates, and t2 is the detection interval time of the power.
Optionally, the first determining unit is further configured to: when the heat pump water heater is in standby, calculating the power consumption W of the heat pump water heater according to the following formula:
W＝k2·p·t2+k3·pstandbytStandby+θ (3)
Wherein k2 is a second correction coefficient, p is the accumulated power when the heat pump water heater operates, t2 is the detection interval time of the power, k3 is a third correction coefficient, pStandbyFor the heat pump water heater stand-by power, tStandbyThe time length of the standby mode is theta, and theta is a correction coefficient and can be obtained through experiments.
A further aspect of the invention provides a storage medium having stored thereon a computer program which, when executed by a processor, carries out the steps of any of the methods described above.
In yet another aspect, the present invention provides a heat pump water heater comprising a processor, a memory, and a computer program stored on the memory and operable on the processor, the processor when executing the program implementing the steps of any of the methods described above.
The invention further provides a heat pump water heater, which comprises the electricity saving quantity determining device of the heat pump water heater.
According to the technical scheme of the invention, the heating capacity, the power consumption and the electricity saving capacity of the heat pump unit are calculated by detecting the running parameters of the water heater in actual use, so that the environment-friendly and electricity-saving effect brought by the heat pump is quantized, and the user experience is improved; and moreover, the calculation mode of calculating the heating capacity, the power consumption and the electricity saving quantity according to the actual operation parameters of the water heater is more accurate.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:
fig. 1 is a schematic method diagram of an embodiment of a method for determining a power saving amount of a heat pump water heater provided by the invention;
FIG. 2 is a system schematic of a heat pump water heater according to the present invention;
FIG. 3 is a schematic method diagram of an embodiment of a method for determining the power saving amount of a heat pump water heater according to the present invention;
fig. 4 is a block diagram illustrating a configuration of an embodiment of a power saving amount determination apparatus for a heat pump water heater according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the specific embodiments of the present invention and the accompanying drawings. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the terms "first," "second," and the like in the description and claims of the present invention and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the invention described herein are capable of operation in sequences other than those illustrated or described herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
Fig. 1 is a schematic method diagram of an embodiment of a method for determining a power saving amount of a heat pump water heater provided by the invention.
As shown in fig. 1, according to an embodiment of the present invention, the power-saving amount determining method includes at least step S110, step S120, and step S130.
And step S110, acquiring the operating parameters of the heat pump water heater.
Step S120, determining the heating capacity and the power consumption of the heat pump water heater according to the operation parameters;
and step S130, determining the electricity saving amount of the heat pump water heater according to the heating amount and the electricity consumption.
The operation parameters may include an initial temperature of the water tank at the time of starting the heat pump water heater, a termination temperature of the water tank at the time of shutdown, an accumulated flow rate of water used when water in the water tank of the heat pump water heater is used, an accumulated inlet water temperature, and an accumulated outlet water temperature. Fig. 2 is a system schematic of a heat pump water heater according to the present invention. As shown in fig. 2, a temperature sensor 2 and a flow sensor 3 are installed on a cold water inlet pipe 1, an upper water tank thermal bulb 5 and a lower water tank thermal bulb 4 are installed on an upper portion of a water tank 6, and a temperature sensor 7 is installed on a hot water outlet pipe 8.
Specifically, the detection temperature of each temperature sensing bulb of the water tank at the time of starting the heat pump water heater is obtained, the initial temperature of the water tank is determined according to the detection temperature of each temperature sensing bulb of the water tank at the time of starting the water heater, the detection temperature of each temperature sensing bulb of the water tank at the time of shutting down the heat pump water heater is obtained, and the termination temperature of the water tank is determined according to the detection temperature of each temperature sensing bulb of the water tank at the time of shutting down the water heater.
For example, as shown in fig. 2, an upper thermal bulb 5 is arranged at the upper part of the water tank, a lower thermal bulb 4 is arranged at the lower part of the water tank, and the temperature T1 of the upper and lower thermal bulbs of the water tank at the time of starting the heat pump water heater is detectedInitialAnd T2InitialThe unit degree centigrade is taken as the initial temperature T of the water tankInitialDetecting the temperature of the upper and lower temperature sensing bags of the water tank at the shutdown time of the heat pump as T1TerminateAnd T2TerminateTaking the average temperature as the termination temperature T of the water tankTerminate。
Preferably, in order to make the data more accurate, correction coefficients a1, a2, b1 and b2 and compensation parameters C1 and C2 are introduced, and then
TInitial＝a1·T1Initial+b1·T2Initial+C1
TTerminate＝a2·T1Terminate+b2·T2Terminate+C2
Wherein a1 is more than or equal to 0, a2 is more than or equal to 1, b1 is more than or equal to 0, and b2 is more than or equal to 1.
Alternatively, the smaller the detection interval, the greater the number of temperature sensing bulbs, the higher the accuracy of the detected data, the more accurate the calculated data,
Tinitial＝a1·T1Initial+b1·T2Initial+c1·T3Initial+...+C1
TTerminate＝a2·T1Terminate+b2·T2Terminate+c2·T3Terminate+...+C2
Wherein, a1, a2, b1, b2, c1 and c2 are more than or equal to 0 and less than or equal to 1.
When the water in the water tank of the heat pump water heater is used, accumulating the flow values which are greater than a preset flow threshold value in the detected flow values to obtain the accumulated water flow. The preset flow threshold is the maximum flow of water fluctuation causing flow change when water is not used (when water in the water tank is not used). That is, when the user uses water during the operation of the heat pump water heater (that is, the flow rate qt detected by the flow sensor is greater than the maximum flow rate q0 of the flow rate change caused by the fluctuation of the user's useless water), the water mass flow rate qt detected by the flow sensor 3 in real time during water supplement is read, and the accumulated flow rate qt is greater than the qt value of the maximum flow rate of the flow rate change caused by the fluctuation of the user's useless water, so as to obtain the accumulated water flow rate q. Here, the detection interval time of the water flow rate is t 1.
When water in the water tank of the heat pump water heater is used, the water inlet temperature and the water outlet temperature of the water tank are accumulated to obtain the accumulated water inlet temperature and the accumulated water outlet temperature of the water tank. Specifically, when the user uses water during the operation of the heat pump water heater (namely the flow rate qt detected by the flow sensor is larger than the maximum flow rate q0 of the flow rate change caused by the fluctuation of the user's useless water), the inlet water temperature T detected by the temperature sensor 2 of the cold water inlet pipe 1 is readInflow tReading the water outlet temperature T detected by the temperature sensor 7 of the hot water outlet pipe 8Outlet water tThe accumulated inlet and outlet water temperature is TInflow water、TDischarging waterThe cumulative number of detections is n.
The heating capacity Q of the heat pump water heater can be specifically calculated according to the following formula:
Q＝k1·C[M(Tterminate-TInitial)+q·t1(TGo out-TInto)/n] (1)
Wherein k1 is a first correction coefficient for correcting the detection deviation, and can be obtained through experiments; c is the ratio of waterHeat capacity, M being the water capacity of the tank, TInitialIs the initial temperature of the water tank, TTerminateIs the tank end temperature, q is the cumulative water flow, TIntoFor integrating the temperature of the feed water, TGo outTo accumulate the outlet water temperature, t1 is the detection interval time of the water flow, and n is the accumulated detection times of the inlet water temperature and the outlet water temperature. The water capacity of the water tank may be specifically a water weight M (in kg) of the water tank, and the water capacity of the water tank may be obtained in a form of input of the first installation, for example, a user inputs the water capacity using a display at the time of the first installation, or may be determined according to a water tank design capacity and a capacity correction coefficient, where the water tank capacity M is x · M, M is the water tank design capacity, and x is the capacity correction coefficient. According to the embodiment, the power consumption of the heat pump water heater is determined according to the initial water tank temperature at the starting time and the ending water tank temperature at the shutdown time of the heat pump water heater, the accumulated water usage flow (actually, water supplement flow) when water in the water tank of the heat pump water heater is used, the accumulated inlet water temperature and the accumulated outlet water temperature, the initial water tank temperature and the ending water tank temperature and the influence of water usage or water supplement on the power consumption are comprehensively considered, and the power consumption can be calculated more accurately.
The operating parameters may also include an accumulated power of the heat pump water heater when operating. Specifically, real-time power pt when the heat pump operates is detected, the operating power of single detection is accumulated to obtain p, and the detection interval time is t 2.
The power consumption W of the heat pump water heater can be calculated according to the following formula:
W＝k2·p·t2 (2)
wherein k2 is a second correction coefficient for correcting the detection deviation, and can be obtained through experiments; p is the accumulated power when the heat pump water heater is operated, and t2 is the detection interval time of the power.
After the heating capacity Q of the heat pump water heater and the power consumption W of the heat pump water heater are obtained, the electric quantity saved by the heat pump water heater can be obtained according to the heating capacity Q and the power consumption W, that is, the electricity saving quantity W is saved as Q-W.
Optionally, the power consumption and/or the power saving amount of the heat pump water heater may be displayed on a display screen of the heat pump water heater.
Optionally, when the heat pump water heater is in a standby state, the power consumption W of the heat pump water heater may be calculated according to the following formula:
W＝k2·p·t2+k3·pstandbytStandby+θ (3)
Wherein k2 is a second correction coefficient, p is the accumulated power when the heat pump water heater operates, t2 is the detection interval time of the power, k3 is a third correction coefficient, pStandbyFor the heat pump water heater stand-by power, tStandbyFor the standby time, θ is a correction factor. When the heat pump unit is in a standby state for a long time, the power consumption can be refreshed at intervals, the power saving amount display is carried out, and the standby power consumption is counted. k2 and k3 are used to correct the detection error and can be obtained by experiments.
According to the embodiment of the invention, when the operation of the heat pump is detected, the power value is recorded, the water replenishing flow (namely the water flow) of the water tank is detected, when the water in the water tank is detected to be used (namely the user replenishes water), the water inlet temperature and the water outlet temperature are detected, and after the heat pump is stopped, the flow of the water tank is not detected any more, and the unit power is not recorded any more.
Optionally, the method further comprises: and memorizing the heating quantity, the power consumption and/or the power saving quantity. The heat pump water heater has a memory function, for example, the heat pump water heater unit has a memory chip memory function, memorizes the water capacity of the water tank, and memorizes the power consumption, the heating capacity and the power saving capacity before power failure, and after the heat pump water heater unit is powered on again, reads the memorized water capacity of the water tank and the memorized power consumption, the heating capacity and the power saving capacity before power failure.
For clearly explaining the technical solution of the present invention, the following describes an implementation flow of the method for determining the electricity saving amount of the heat pump water heater according to the present invention with a specific embodiment.
Fig. 3 is a schematic method diagram of an embodiment of the method for determining the electricity saving amount of the heat pump water heater according to the present invention. As shown in figure 3 of the drawings,
during first installation, the water containing quantity is input, the specific heat capacity C of water is read, and the initial heating quantity Q is obtainedFirst stageInitial power consumption W equal to 0First stage0, initial sectionElectric quantity WPower saving deviceDetecting the temperature T1 of upper and lower temperature sensing bags of the water tank when the heat pump is started upInitialAnd T2InitialTaking the average temperature as TInitialThe temperature of the upper and lower temperature sensing bags of the water tank at the shutdown time of the heat pump is T1Terminate，T2TerminateTaking the average temperature as TTerminateDuring operation of the heat pump (real-time power p > p)Standby) When the user uses water (namely the flow rate qt detected by the flow sensor is larger than the maximum flow rate q0 of flow change caused by the fluctuation of useless water of the user), the real-time water mass flow rate qt detected by the flow sensor during water supplement is detected and read, the qt value when the accumulated detected flow rate qt is larger than the maximum flow rate of flow change caused by the fluctuation of useless water of the user is q, the initial flow rate q isFirst stage0, q is qt + q for each accumulationFirst stage，qFirst stageQ, the detection time interval is T1, and the real-time inlet water temperature T is readAdvance tReal-time water outlet temperature TGo outT, cumulative inlet and outlet water temperature is TInto、TGo out，TInto＝TStart and end+TIntot，TGo out＝TAt first birth+TGo outt, the detection time interval is t3, the accumulated detection times is n, and n is equal to nFirst stage+1, n after each accumulationFirst stage＝n，TStart and end＝TInto，TAt first birth＝TGo out，TInitial＝a1·T1Initial+b1·T2Initial+C1，TTerminate＝a2·T1Terminate+b2·T2Terminate+ C2, heating capacity Q ═ k1 · C [ M (T)Terminate-TInitial)+q·t1(TGo out-TInto)/n]Real time power p > pStandbyDetecting real-time power pt when the heat pump operates, and accumulating the operating power of single detection as p (p is p + p)First stage，pFirst stageP), the detection interval time is t2, the power consumption W is k2 p.t 2, and the heat pump system saves the power WPower savingQ-W; displaying heating quantity Q, power consumption W and power saving quantity W on display screen to save electricity, QDisplay device＝QFirst stage+Q，WDisplay device＝WFirst stage+W，WPower saving display＝WPower saving device+WPower saving，QFirst stage＝QDisplay device，WFirst stage＝WDisplay device，WPower saving device＝WPower saving display. After the unit is powered off and powered on again, if the unit has the memory chip storage function, the capacity, the power consumption, the heating capacity and the power saving capacity of the memorized water tank are read.
Fig. 4 is a block diagram illustrating a configuration of an embodiment of a power saving amount determination apparatus for a heat pump water heater according to the present invention. As shown in fig. 4, the power-saving amount determination apparatus 100 includes: an acquisition unit 110, a first determination unit 120 and a second determination unit 130.
The obtaining unit 110 is configured to obtain an operation parameter of the heat pump water heater; the first determining unit 120 is configured to determine the heating capacity and the power consumption of the heat pump water heater according to the operating parameter; the second determination unit 130 is configured to determine the power saving amount of the heat pump water heater according to the heating amount and the power consumption amount.
The operation parameters may include an initial temperature of the water tank at the time of starting the heat pump water heater, a termination temperature of the water tank at the time of shutdown, an accumulated flow rate of water used when water in the water tank of the heat pump water heater is used, an accumulated inlet water temperature, and an accumulated outlet water temperature. Fig. 2 is a system schematic of a heat pump water heater according to the present invention. As shown in fig. 2, a temperature sensor 2 and a flow sensor 3 are installed on a cold water inlet pipe 1, an upper water tank thermal bulb 5 and a lower water tank thermal bulb 4 are installed on an upper portion of a water tank 6, and a temperature sensor 7 is installed on a hot water outlet pipe 8.
The obtaining unit 110 obtains the detected temperature of each thermal bulb of the water tank at the time of starting the heat pump water heater, determines the initial temperature of the water tank according to the detected temperature of each thermal bulb of the water tank at the time of starting the heat pump water heater, obtains the detected temperature of each thermal bulb of the water tank at the time of shutting down the heat pump water heater, and determines the termination temperature of the water tank according to the detected temperature of each thermal bulb of the water tank at the time of shutting down the water heater.
For example, as shown in fig. 2, an upper thermal bulb 5 is arranged at the upper part of the water tank, a lower thermal bulb 4 is arranged at the lower part of the water tank, and the temperature T1 of the upper and lower thermal bulbs of the water tank at the time of starting the heat pump water heater is detectedInitialAnd T2InitialThe unit degree centigrade is taken as the initial temperature T of the water tankInitialDetecting the temperature of the upper and lower temperature sensing bags of the water tank at the shutdown time of the heat pump as T1TerminateAnd T2TerminateTaking the average temperature as the termination temperature T of the water tankTerminate。
Preferably, in order to make the data more accurate, correction coefficients a1, a2, b1 and b2 and compensation parameters C1 and C2 are introduced, and then
TInitial＝a1·T1Initial+b1·T2Initial+C1
TTerminate＝a2·T1Terminate+b2·T2Terminate+C2
Wherein a1 is more than or equal to 0, a2 is more than or equal to 1, b1 is more than or equal to 0, and b2 is more than or equal to 1.
Alternatively, the smaller the detection interval, the greater the number of temperature sensing bulbs, the higher the accuracy of the detected data, the more accurate the calculated data,
Tinitial＝a1·T1Initial+b1·T2Initial+c1·T3Initial+...+C1
TTerminate＝a2·T1Terminate+b2·T2Terminate+c2·T3Terminate+...+C2
Wherein, a1, a2, b1, b2, c1 and c2 are more than or equal to 0 and less than or equal to 1.
When the water in the water tank of the heat pump water heater is used, the obtaining unit 110 accumulates the flow values larger than the preset flow threshold value among the detected flow values to obtain the accumulated water flow. The preset flow threshold is the maximum flow of water fluctuation causing flow change when water is not used (when water in the water tank is not used). That is, when the user uses water during the operation of the heat pump water heater (that is, the flow rate qt detected by the flow sensor is greater than the maximum flow rate q0 of the flow rate change caused by the fluctuation of the user's useless water), the water mass flow rate qt detected by the flow sensor 3 in real time during water supplement is read, and the accumulated flow rate qt is greater than the qt value of the maximum flow rate of the flow rate change caused by the fluctuation of the user's useless water, so as to obtain the accumulated water flow rate q. Here, the detection interval time of the water flow rate is t 1.
When water in the water tank of the heat pump water heater is used, the obtaining unit 110 accumulates the inlet water temperature and the outlet water temperature of the water tank to obtain the accumulated inlet water temperature and the accumulated outlet water temperature of the water tank. Specifically, when the heat pump water heater is in operation, the user uses water (namely the flow rate qt detected by the flow sensor is more than useless for the user)Maximum flow q0 of flow change caused by water fluctuation), reading the inlet water temperature T detected by the temperature sensor 2 of the cold water inlet pipe 1Inflow waterT, reading the water outlet temperature T detected by the temperature sensor 7 of the hot water outlet pipe 8Discharging waterT, the accumulated inlet and outlet water temperature is TInflow water、TGo outWater, the cumulative number of detections is n.
The first determination unit 120 may calculate the heating amount Q of the heat pump water heater according to the following formula (1):
Q＝k1·C[M(Tterminate-TInitial)+q·t1(TGo out-TInto)/n] (1)
Wherein k1 is a first correction coefficient for correcting the detection deviation, and can be obtained through experiments; c is the specific heat capacity of water, M is the water capacity of the water tank, TInitialIs the initial temperature of the water tank, TTerminateIs the tank end temperature, q is the cumulative water flow, TIntoFor integrating the temperature of the feed water, TGo outTo accumulate the outlet water temperature, t1 is the detection interval time of the water flow, and n is the accumulated detection times of the inlet water temperature and the outlet water temperature. The water capacity of the water tank may be specifically a water weight M (in kg) of the water tank, and the water capacity of the water tank may be obtained in a form of input of the first installation, for example, a user inputs the water capacity using a display at the time of the first installation, or may be determined according to a water tank design capacity and a capacity correction coefficient, where the water tank capacity M is x · M, M is the water tank design capacity, and x is the capacity correction coefficient. According to the embodiment, the power consumption of the heat pump water heater is determined according to the initial water tank temperature at the starting time and the ending water tank temperature at the shutdown time of the heat pump water heater, the accumulated water usage flow (actually, water supplement flow) when water in the water tank of the heat pump water heater is used, the accumulated inlet water temperature and the accumulated outlet water temperature, the initial water tank temperature and the ending water tank temperature and the influence of water usage or water supplement on the power consumption are comprehensively considered, and the power consumption can be calculated more accurately.
The operating parameters may also include an accumulated power of the heat pump water heater when operating. Specifically, the obtaining unit 110 detects the real-time power pt when the heat pump operates, accumulates the operating power of a single detection to obtain p, and the detection interval time is t 2.
The first determination unit 120 may calculate the power consumption W of the heat pump water heater according to the following formula:
W＝k2·p·t2 (2)
wherein k2 is a second correction coefficient for correcting the detection deviation, and can be obtained through experiments; p is the accumulated power when the heat pump water heater is operated, and t2 is the detection interval time of the power.
After the heating capacity Q of the heat pump water heater and the power consumption W of the heat pump water heater are obtained, the second determining unit 130 may obtain the power saved by the heat pump water heater according to the heating capacity Q and the power consumption W, that is, the power saving amount W is equal to Q-W.
Optionally, the apparatus 100 may further include a display unit (not shown). The display unit is used for displaying the power consumption and/or the power saving amount of the heat pump water heater, for example, the power consumption and/or the power saving amount of the heat pump water heater can be displayed on a display screen of the heat pump water heater.
Alternatively, when the heat pump water heater is in a standby state, the first determination unit 120 may calculate the power consumption W of the heat pump water heater according to the following formula:
W＝k2·p·t2+k3·pstandbytStandby+θ (3)
Wherein k2 is a second correction coefficient, p is the accumulated power when the heat pump water heater operates, t2 is the detection interval time of the power, k3 is a third correction coefficient, pStandbyFor the heat pump water heater stand-by power, tStandbyFor the standby time, θ is a correction factor. When the heat pump unit is in a standby state for a long time, the power consumption can be refreshed at intervals, the power saving amount display is carried out, and the standby power consumption is counted. k2 and k3 are used to correct the detection error and can be obtained by experiments.
According to the embodiment of the invention, when the operation of the heat pump is detected, the power value is recorded, the water replenishing flow (namely the water flow) of the water tank is detected, when the water in the water tank is detected to be used (namely the user replenishes water), the water inlet temperature and the water outlet temperature are detected, and after the heat pump is stopped, the flow of the water tank is not detected any more, and the unit power is not recorded any more.
Optionally, the apparatus 100 further comprises a memory unit (not shown). The memory unit is used for memorizing the heating quantity, the power consumption and/or the power saving quantity. The heat pump water heater has a memory function, for example, the heat pump water heater unit has a memory chip memory function, memorizes the water capacity of the water tank, and memorizes the power consumption, the heating capacity and the power saving capacity before power failure, and after the heat pump water heater unit is powered on again, reads the memorized water capacity of the water tank and the memorized power consumption, the heating capacity and the power saving capacity before power failure.
The invention also provides a storage medium corresponding to the method for determining the electricity saving amount of the heat pump water heater, wherein a computer program is stored on the storage medium, and when the program is executed by a processor, the program realizes the steps of any one of the methods.
The invention also provides a heat pump water heater corresponding to the electricity saving quantity determination method of the heat pump water heater, which comprises a processor, a memory and a computer program stored on the memory and capable of running on the processor, wherein the processor executes the computer program to realize the steps of any one of the methods.
The invention also provides a heat pump water heater corresponding to the electricity saving amount determining device of the heat pump water heater, which comprises the electricity saving amount determining device of any one of the heat pump water heaters.
According to the scheme provided by the invention, the heating capacity, the power consumption and the electricity saving capacity of the heat pump unit are calculated by detecting the running parameters of the water heater in actual use, so that the environment-friendly and electricity-saving effect brought by the heat pump is quantized, and the user experience is improved; and moreover, the calculation mode of calculating the heating capacity, the power consumption and the electricity saving quantity according to the actual operation parameters of the water heater is more accurate.
The functions described herein may be implemented in hardware, software executed by a processor, firmware, or any combination thereof. If implemented in software executed by a processor, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Other examples and implementations are within the scope and spirit of the invention and the following claims. For example, due to the nature of software, the functions described above may be implemented using software executed by a processor, hardware, firmware, hardwired, or a combination of any of these. In addition, each functional unit may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit.
In the embodiments provided in the present application, it should be understood that the disclosed technology can be implemented in other ways. The above-described embodiments of the apparatus are merely illustrative, and for example, the division of the units may be a logical division, and in actual implementation, there may be another division, for example, multiple units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, units or modules, and may be in an electrical or other form.
The units described as separate parts may or may not be physically separate, and the parts serving as the control device may or may not be physical units, may be located in one place, or may be distributed on a plurality of units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
The integrated unit, if implemented in the form of a software functional unit and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a removable hard disk, a magnetic or optical disk, and other various media capable of storing program codes.
The above description is only an example of the present invention, and is not intended to limit the present invention, and it is obvious to those skilled in the art that various modifications and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (12)
1. A method for determining the electricity saving amount of a heat pump water heater is characterized by comprising the following steps:
acquiring the operating parameters of the heat pump water heater;
determining the heating capacity and the power consumption of the heat pump water heater according to the operation parameters;
and determining the electricity saving amount of the heat pump water heater according to the heating amount and the electricity consumption.
2. The method of claim 1,
the operating parameters include: the heat pump water heater comprises a water tank initial temperature at the time of starting up the heat pump water heater, a water tank termination temperature at the time of shutting down the heat pump water heater, an accumulated water flow, an accumulated water inlet temperature and an accumulated water outlet temperature when water in the water tank of the heat pump water heater is used;
obtaining the operating parameters of the heat pump water heater, including:
acquiring the detection temperature of each temperature sensing bulb of the water tank at the time of starting the heat pump water heater, determining the initial temperature of the water tank according to the detection temperature of each temperature sensing bulb of the water tank at the time of starting, acquiring the detection temperature of each temperature sensing bulb of the water tank at the time of shutdown of the heat pump water heater, and determining the termination temperature of the water tank according to the detection temperature of each temperature sensing bulb of the water tank at the time of shutdown;
and/or the presence of a gas in the gas,
when water in a water tank of the heat pump water heater is used, accumulating flow values which are larger than a preset flow threshold value in detected flow values to obtain the accumulated water flow;
and/or the presence of a gas in the gas,
when water in the water tank of the heat pump water heater is used, the water inlet temperature and the water outlet temperature of the water tank are accumulated to obtain the accumulated water inlet temperature and the accumulated water outlet temperature of the water tank.
3. The method of claim 2, wherein determining the heating capacity of the heat pump water heater based on the operating parameter comprises:
calculating the heating quantity Q of the heat pump water heater according to the following formula:
Q＝k1·C[M(Tterminate-TInitial)+q·t1(TGo out-TInto)/n] (1)
Wherein k1 is a first correction coefficient, C is the specific heat capacity of water, M is the water capacity of the water tank, and T isInitialIs the initial temperature of the water tank, TTerminateIs the tank end temperature, q is the cumulative water flow, TIntoFor integrating the temperature of the feed water, TGo outTo accumulate the outlet water temperature, t1 is the detection interval time of the water flow, and n is the accumulated detection times of the inlet water temperature and the outlet water temperature.
4. A method according to any of claims 1-3, wherein the operating parameters comprise: the accumulated power of the heat pump water heater during operation;
determining the power consumption of the heat pump water heater according to the operation parameters, comprising:
calculating the power consumption W of the heat pump water heater according to the following formula:
W＝k2·p·t2 (2)
and k2 is a second correction coefficient, p is the accumulated power when the heat pump water heater operates, and t2 is the detection interval time of the power.
5. The method of claim 4, further comprising:
when the heat pump water heater is in standby, calculating the power consumption W of the heat pump water heater according to the following formula:
W＝k2·p·t2+k3·pstandbytStandby+θ (3)
Wherein k2 is a second correction coefficient, p is the accumulated power when the heat pump water heater operates, t2 is the detection interval time of the power, k3 is a third correction coefficient, pStandbyFor the heat pump water heater stand-by power, tStandbyFor the standby time, θ is a correction factor.
6. An electricity-saving amount determining device for a heat pump water heater, comprising:
the acquisition unit is used for acquiring the operating parameters of the heat pump water heater;
the first determining unit is used for determining the heating capacity and the power consumption of the heat pump water heater according to the operation parameters;
and the second determining unit is used for determining the electricity saving amount of the heat pump water heater according to the heating amount and the electricity consumption.
7. The apparatus of claim 6,
the operating parameters include: the heat pump water heater comprises a water tank initial temperature at the time of starting up the heat pump water heater, a water tank termination temperature at the time of shutting down the heat pump water heater, an accumulated water flow, an accumulated water inlet temperature and an accumulated water outlet temperature when water in the water tank of the heat pump water heater is used;
the obtaining unit obtains the operating parameters of the heat pump water heater, and comprises:
acquiring the detection temperature of each temperature sensing bulb of the water tank at the time of starting the heat pump water heater, determining the initial temperature of the water tank according to the detection temperature of each temperature sensing bulb of the water tank at the time of starting, acquiring the detection temperature of each temperature sensing bulb of the water tank at the time of shutdown of the heat pump water heater, and determining the termination temperature of the water tank according to the detection temperature of each temperature sensing bulb of the water tank at the time of shutdown;
and/or the presence of a gas in the gas,
when water in a water tank of the heat pump water heater is used, accumulating flow values which are larger than a preset flow threshold value in detected flow values to obtain the accumulated water flow;
and/or the presence of a gas in the gas,
when water in the water tank of the heat pump water heater is used, the water inlet temperature and the water outlet temperature of the water tank are accumulated to obtain the accumulated water inlet temperature and the accumulated water outlet temperature of the water tank.
8. The apparatus of claim 7, wherein the first determining unit determines the heating capacity of the heat pump water heater according to the operation parameter, and comprises:
calculating the heating quantity Q of the heat pump water heater according to the following formula:
Q＝k1·C[M(Tterminate-TInitial)+q·t1(TGo out-TInto)/n] (1)
Wherein k1 is a first correction coefficient, C is the specific heat capacity of water, M is the water capacity of the water tank, TAITION is the initial temperature of the water tankTerminateIs the tank end temperature, q is the cumulative water flow, TIntoFor integrating the temperature of the feed water, TGo outTo accumulate the outlet water temperature, t1 is the detection interval time of the water flow, and n is the accumulated detection times of the inlet water temperature and the outlet water temperature.
9. The apparatus of any of claims 6-8, wherein the operating parameters comprise: the accumulated power of the heat pump water heater during operation;
the first determining unit determines the power consumption of the heat pump water heater according to the operation parameters, and comprises the following steps:
calculating the power consumption W of the heat pump water heater according to the following formula:
W＝k2·p·t2 (2)
and k2 is a second correction coefficient, p is the accumulated power when the heat pump water heater operates, and t2 is the detection interval time of the power.
10. The apparatus of claim 9, wherein the first determining unit is further configured to: when the heat pump water heater is in standby, calculating the power consumption W of the heat pump water heater according to the following formula:
W＝k2·p·t2+k3·pstandbytStandby+θ (3)
Wherein k2 is a second correction coefficient, p is the accumulated power when the heat pump water heater operates, t2 is the detection interval time of the power, k3 is a third correction coefficient, pStandbyFor the heat pump water heater stand-by power, tStandbyFor the standby time, θ is a correction factor.
11. A storage medium, having stored thereon a computer program which, when being executed by a processor, carries out the steps of the method of any one of claims 1 to 5.
12. A heat pump water heater comprising a processor, a memory, and a computer program stored on the memory and executable on the processor, the processor when executing the program implementing the steps of the method of any one of claims 1 to 5 or comprising the power-saving amount determining apparatus of any one of claims 6 to 10.
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| CN202010697701.0A CN111928486A (en) | 2020-07-20 | 2020-07-20 | Heat pump water heater and electricity saving amount determining method and device thereof and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114576697A (en) * | 2022-02-28 | 2022-06-03 | 日出东方控股股份有限公司 | Hot water energy-saving metering system |
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Application publication date: 20201113 |