CN103574910B - The water pump control method of heat pump water-heating machine and device and heat pump water-heating machine - Google Patents
The water pump control method of heat pump water-heating machine and device and heat pump water-heating machine Download PDFInfo
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- CN103574910B CN103574910B CN201210283306.3A CN201210283306A CN103574910B CN 103574910 B CN103574910 B CN 103574910B CN 201210283306 A CN201210283306 A CN 201210283306A CN 103574910 B CN103574910 B CN 103574910B
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Abstract
The invention discloses a kind of water pump control method of heat pump water-heating machine and device and heat pump water-heating machine, the water pump control method of this heat pump water-heating machine comprises: the heating capacity determining unit in heat pump water-heating machine; Obtain the inflow temperature of heat exchanger in heat pump water-heating machine; According to the water flow in heating capacity, inflow temperature and design temperature determination heat pump water-heating machine, wherein, design temperature is preset by user; The rotating speed of target of adjustable speed water pump is obtained according to water flow; And control adjustable speed water pump raising rotating speed to reach rotating speed of target.By the present invention, ensure that the hot water that can export design temperature in all cases neatly.
Description
Technical field
The present invention relates to hot water machine field, in particular to a kind of water pump control method of heat pump water-heating machine and device and heat pump water-heating machine.
Background technology
The Flow modulation that current direct-heating heat pump water heater generally adopts " determining rotating speed water pump+flow control valve ", namely pump rotary speed is constant, the resistance of water system is changed by the aperture ratio of adjust flux control valve, the flow of corresponding change water system, thus leaving water temperature stable under realizing varying environment temperature, inflow temperature, realize directly-heated and run.
Scheme of " determining rotating speed water pump+flow control valve ", in start-up phase, generally adopts environmentally temperature range to fix the start operation method of different valve opening.So just have some defects, such as, because start-up phase unit capacity exports limited, leaving water temperature rises comparatively slow, can not rapid hot water output.In addition, owing to not taking into account coolant-temperature gage, this heat pump water-heating machine is subject to the impact of inflow temperature change, and leaving water temperature easily fluctuates.Simultaneously, in the impact that the unit capacity being subject to environment temperature, inflow temperature or heat pump water-heating machine changes, existing heat pump water-heating machine can not meet various situation, and the then start-up phase water temperature rise time bigger than normal lengthens, less than normal, easily occurs the situation that water outlet overtemperature, high pressure are higher.
Can not the problem of flexible modulation temperature for heat pump water-heating machine in prior art, at present effective solution is not yet proposed.
Summary of the invention
The invention provides a kind of water pump control method of heat pump water-heating machine and device and heat pump water-heating machine, can not the problem of flexible modulation temperature at least to solve heat pump water-heating machine in prior art.
To achieve these goals, according to an aspect of the present invention, a kind of water pump control method of heat pump water-heating machine is provided.
Water pump control method according to heat pump water-heating machine of the present invention comprises: the heating capacity determining unit in heat pump water-heating machine; Obtain the inflow temperature of heat exchanger in heat pump water-heating machine; According to the water flow in heating capacity, inflow temperature and design temperature determination heat pump water-heating machine, wherein, design temperature is preset by user; The rotating speed of target of adjustable speed water pump is obtained according to water flow; And control adjustable speed water pump raising rotating speed to reach rotating speed of target.
Further, control adjustable speed water pump raising rotating speed and comprise to reach rotating speed of target: control adjustable speed water pump and rotating speed is adjusted to rotating speed of target from initial speed, wherein, initial speed is determined according to following formula: as environment temperature Te > 35 DEG C,
when 20 DEG C of < Te≤35 DEG C,
when 7 DEG C of < Te≤20 DEG C,
when Te≤7 DEG C,
wherein, Δ R1, Δ R2, Δ R3 and Δ R4 are alternation speed discrepancy, and Δ R1≤Δ R2≤Δ R3≤Δ R4.
Further, the size of rotating speed of target can regulate according to water flow.
Further, control adjustable speed water pump rotating speed is adjusted to rotating speed of target from initial speed comprises: the speed governing amplitude of adjustable speed water pump is determined according to following formula:
wherein, r
currentfor current rotating speed, t1
residuefor the time remaining in t1 regulation time, Δ t1 is adjustment cycle.
Further, the span of adjustment cycle Δ t1 is 1 to 15 second.
Further, comprise according to the water flow in heating capacity, inflow temperature and design temperature determination heat pump water-heating machine: according to following formula determination water flow:
wherein, M is water flow, and Q is heating capacity, and Ts is design temperature, and Ti is inflow temperature, and Cp is that specific heat of water holds.
Further, comprise according to the rotating speed of target of water flow acquisition adjustable speed water pump: the corresponding relation obtaining unit water system pump rotary speed and flow; And obtain rotating speed of target corresponding to water flow according to unit water system pump rotary speed with the corresponding relation of flow.
Further, obtain inflow temperature and comprise: before compressor operating, control adjustable speed water pump running; And obtain inflow temperature by the temperature sensor be arranged in the water inlet pipe pipeline of heat exchanger.
Further, control adjustable speed water pump running and comprise: control adjustable speed water pump by preset rotation speed running, wherein, determine the time operated according to following formula:
wherein, di is the water pipe internal diameter of water system i-th short tube, and li is the water pipe total length of water system i-th short tube, and q is the flow of water pump under preset rotation speed.
Further, after control adjustable speed water pump rotates with rotating speed of target, said method also comprises: by regulating the rotating speed of adjustable speed water pump to regulate the leaving water temperature of heat exchanger to design temperature.
Further, by regulating the rotating speed of adjustable speed water pump to comprise to regulate the leaving water temperature of heat exchanger: the rotating speed regulating adjustable speed water pump according to following formula: TempR=TempR
last time+ △ r2, △ r2=e*Kt1+De*Kt2, wherein, TempR is the current rotating speed of water pump, TempR
last timefor the rotating speed before testing pump, △ r2 is rotational speed regulation amplitude, and e is the difference of current leaving water temperature and design temperature, and De is the difference of the inflow temperature before current inflow temperature and pump rotary speed regulate, Kt1 and Kt2 is respectively coefficient.
Further, comprise to regulate the leaving water temperature of heat exchanger by regulating the rotating speed of adjustable speed water pump: often through prefixed time interval, regulate the rotating speed of adjustable speed water pump, wherein, prefixed time interval is 5 to 30 seconds.
To achieve these goals, according to another aspect of the present invention, provide a kind of pump control unit of heat pump water-heating machine, this device is for performing the water pump control method of any one heat pump water-heating machine provided by the invention.
According to a further aspect in the invention, a kind of pump control unit of heat pump water-heating machine is provided.The pump control unit of this heat pump water-heating machine comprises: the first determining unit, for determining the heating capacity of unit in heat pump water-heating machine; First acquiring unit, for obtaining the inflow temperature of heat exchanger in heat pump water-heating machine; Second determining unit, for according to the water flow in heating capacity, inflow temperature and design temperature determination heat pump water-heating machine, wherein, design temperature is preset by user; Second acquisition unit, for obtaining the rotating speed of target of adjustable speed water pump according to water flow; And control unit, improve rotating speed to reach rotating speed of target for controlling adjustable speed water pump.
Further, rotating speed is also adjusted to rotating speed of target from initial speed for controlling adjustable speed water pump by control unit, and wherein, initial speed is determined according to following formula: as environment temperature Te > 35 DEG C,
when 20 DEG C of < Te≤35 DEG C,
when 7 DEG C of < Te≤20 DEG C,
when Te≤7 DEG C,
wherein, Δ R1, Δ R2, Δ R3 and Δ R4 are alternation speed discrepancy, and Δ R1≤Δ R2≤Δ R3≤Δ R4.
Further, the size of rotating speed of target can regulate according to water flow.
Further, control unit is also for controlling the adjusting range of adjustable speed water pump according to following formula:
wherein, r
currentfor current rotating speed, t1
residuefor the time remaining in t1 regulation time, Δ t1 is adjustment cycle.
Further, the span of adjustment cycle Δ t1 is 1 to 15 second.
Further, the second determining unit is also for according to following formula determination water flow:
Wherein, M is water flow, and Q is heating capacity, and Ts is design temperature, and Ti is inflow temperature, and Cp is that specific heat of water holds.
Further, second acquisition unit comprises: first obtains subelement, for obtaining the corresponding relation of unit water system pump rotary speed and flow; And second obtains subelement, for obtaining rotating speed of target corresponding to water flow according to unit water system pump rotary speed with the corresponding relation of flow.
Further, the first acquiring unit comprises: control subelement, for before compressor operating, controls adjustable speed water pump running; And the 3rd obtains subelement, for obtaining inflow temperature by the temperature sensor be arranged in the water inlet pipe pipeline of heat exchanger.
Further, the first acquiring unit comprises: control subelement and also operate by preset rotation speed for controlling adjustable speed water pump, wherein, determines the time operated according to following formula:
wherein, d
ifor the water pipe internal diameter of water system i-th short tube, l
ifor the water pipe total length of water system i-th short tube, q is the flow of water pump under preset rotation speed.
Further, said apparatus also comprises: regulon, for the rotating speed by adjustment adjustable speed water pump to regulate the leaving water temperature of heat exchanger to design temperature.
Further, regulon is also for regulating the rotating speed of adjustable speed water pump according to following formula: TempR=TempR
on secondary+ △ r2, △ r2=e*Kt1+De*Kt2, wherein, TempR is the current rotating speed of water pump, TempR
last timefor the rotating speed before testing pump, △ r2 is rotational speed regulation amplitude, and e is the difference of current leaving water temperature and design temperature, and De is the difference of the inflow temperature before current inflow temperature and pump rotary speed regulate, Kt1 and Kt2 is respectively coefficient.
Further, regulon is also for often through prefixed time interval, and regulate the rotating speed of adjustable speed water pump, wherein, prefixed time interval is 5 to 30 seconds.
To achieve these goals, according to a further aspect of the invention, provide a kind of heat pump water-heating machine, this heat pump water-heating machine comprises the pump control unit of any one heat pump water-heating machine provided by the invention.
By the present invention, owing to selecting the heating capacity of unit in advance, and determine the water flow matched with this heating capacity and inflow temperature and design temperature, thus draw the rotating speed of target of adjustable speed water pump when meeting this water flow.Rotate with this rotating speed of target by controlling adjustable speed water pump, solving heat pump water-heating machine can not the problem of flexible modulation temperature, and then ensure that the hot water that can export design temperature in all cases neatly.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide a further understanding of the present invention, and schematic description and description of the present invention, for explaining the present invention, does not form inappropriate limitation of the present invention.In the accompanying drawings:
Fig. 1 is the structured flowchart of the pump control unit of heat pump water-heating machine according to the embodiment of the present invention;
Fig. 2 is the structured flowchart of the pump control unit of heat pump water-heating machine according to first preferred embodiment of the invention;
Fig. 3 is the schematic diagram of heat pump water-heating machine according to the preferred embodiment of the invention;
Fig. 4 is the flow chart of the water pump control method of heat pump water-heating machine according to the embodiment of the present invention; And
Fig. 5 is the control schematic diagram according to the embodiment of the present invention.
Detailed description of the invention
It should be noted that, when not conflicting, the embodiment in the application and the feature in embodiment can combine mutually.Below with reference to the accompanying drawings and describe the present invention in detail in conjunction with the embodiments.
Embodiments provide a kind of pump control unit of heat pump water-heating machine, below the pump control unit of the heat pump water-heating machine that the embodiment of the present invention provides is introduced.
Fig. 1 is the structured flowchart of the pump control unit of heat pump water-heating machine according to the embodiment of the present invention.
As shown in Figure 1, the pump control unit of this heat pump water-heating machine comprises the first determining unit 11, first acquiring unit 12, second determining unit 13, second acquisition unit 14 and control unit 15.
First determining unit 11 is for determining the heating capacity of unit in heat pump water-heating machine.
First acquiring unit 12 is for obtaining the inflow temperature of heat exchanger in heat pump water-heating machine.
The function of this unit can be realized by temperature sensor.
Second determining unit 13 is for according to the water flow in heating capacity, inflow temperature and design temperature determination heat pump water-heating machine, and wherein, design temperature is preset by user.
The function of this unit can be realized by CPU.
In a kind of specific implementation, the second determining unit 13 is also for according to following formula determination water flow:
Wherein, M is water flow, and Q is heating capacity, and Ts is design temperature, and Ti is inflow temperature, and Cp is that specific heat of water holds.
Second acquisition unit 14 is for obtaining the rotating speed of target of adjustable speed water pump according to water flow.
Control unit 15 improves rotating speed to reach rotating speed of target for controlling adjustable speed water pump.
The function of this unit can be realized by CPU.
As one preferred embodiment, rotating speed is also adjusted to rotating speed of target from initial speed for controlling adjustable speed water pump by control unit, and wherein, initial speed is determined according to following formula: as environment temperature Te > 35 DEG C,
when 20 DEG C of < Te≤35 DEG C,
when 7 DEG C of < Te≤20 DEG C,
when Te≤7 DEG C,
wherein, Δ R1, Δ R2, Δ R3 and Δ R4 are alternation speed discrepancy, and Δ R1≤Δ R2≤Δ R3≤Δ R4.
In this present embodiment, the size of rotating speed of target can regulate according to water flow.
Control unit is also for controlling the adjusting range of adjustable speed water pump according to following formula:
wherein, r
currentfor current rotating speed, t1
residuefor the time remaining in t1 regulation time, Δ t1 is adjustment cycle.
Particularly, the span of adjustment cycle Δ t1 is 1 to 15 second, and this Cycle Length both can ensure the accuracy adjusted, and also took into account the problem of equipment loss, ensure that service life.
The water pump that the present embodiment adopts is adjustable speed water pump, and particularly, can be stepless speed regulation DC water pump, this water pump can regulate pump rotary speed arbitrarily, i.e. the piping flow of any adjusting heat pump hot water machine heat exchanger water inlet pipe and water outlet pipe.
In the present embodiment, owing to selecting the heating capacity of unit in advance, and determine the water flow matched with this heating capacity and inflow temperature and design temperature, thus draw the rotating speed of target of adjustable speed water pump when meeting this water flow.Regulated to this rotating speed of target gradually by the slow-speed of revolution within a certain period of time by controlling adjustable speed water pump, take into account the impact of inflow temperature change simultaneously, solving heat pump water-heating machine can not the problem of flexible modulation temperature, and then ensure that the hot water that can export design temperature in all cases neatly.
In the present embodiment, the rotating speed of target of adjustable speed water pump can be obtained by unit water system characteristic curve.Therefore, second acquisition unit 14 can comprise the first acquisition subelement and second and obtain subelement, and wherein, first obtains subelement, for obtaining the corresponding relation of unit water system pump rotary speed and flow.Second obtains subelement, for obtaining rotating speed of target corresponding to water flow according to unit water system pump rotary speed with the corresponding relation of flow.
In order to ensure inflow temperature that the first acquiring unit gets be relatively all and water tank temperature, the first acquiring unit 12 can comprise and controls subelement and the 3rd and obtain subelement, wherein, controls subelement and is used for before compressor operating, control adjustable speed water pump running.3rd obtains subelement for being obtained the inflow temperature of heat exchanger by the temperature sensor be arranged in the water inlet pipe pipeline of heat exchanger.
Further, control subelement and also operate by preset rotation speed for controlling adjustable speed water pump, wherein, determine the time operated according to following formula:
Wherein, d
ifor the water pipe internal diameter of water system i-th short tube, l
ifor the water pipe total length of water system i-th short tube, q is the flow of water pump under preset rotation speed.
Fig. 2 is the structured flowchart of the pump control unit of heat pump water-heating machine according to first preferred embodiment of the invention.This embodiment can as preferred embodiment embodiment illustrated in fig. 1.
As shown in Figure 2, the pump control unit of this heat pump water-heating machine, except comprising the first determining unit 11, first acquiring unit 12, second determining unit 13, second acquisition unit 14 and control unit 15, also comprises regulon 16.
Regulon 16 regulates the rotating speed of adjustable speed water pump to regulate the leaving water temperature of heat exchanger to design temperature for passing through.
By this embodiment, can leaving water temperature be stablized, prevent leaving water temperature fluctuation ratio larger.
As a kind of specific implementation, regulon regulates the rotating speed of this adjustable speed water pump according to following formula:
TempR=TempR
last time+ △ r2,
△r2=e*Kt1+De*Kt2，
Wherein, TempR is the current rotating speed of water pump, TempR
last timefor the rotating speed before testing pump, △ r2 is rotational speed regulation amplitude, and e is the difference of current leaving water temperature and design temperature, and De is the difference of the inflow temperature before current inflow temperature and pump rotary speed regulate, Kt1 and Kt2 is respectively coefficient.
Regulon is also for often through prefixed time interval, and regulate the rotating speed of adjustable speed water pump, wherein, prefixed time interval is 5 to 30 seconds.
This embodiment can eliminate the deviation that unit operation stablizes rear leaving water temperature and design temperature fast, and the operation for the later stage controls to lay a solid foundation, and prevents follow-up causing because deviation is excessive from controlling overshoot, thus makes leaving water temperature recurrent fluctuations larger.Consider the impact that inflow temperature changes simultaneously, eliminated the effects of the act by pump rotary speed response.
The embodiment of the present invention additionally provides a kind of Teat pump boiler, comprises the pump control unit of any one heat pump water-heating machine above-mentioned.
Fig. 3 is the schematic diagram of heat pump water-heating machine according to the preferred embodiment of the invention.As shown in Figure 3, this heat pump water-heating machine absorbs the heat in refrigerant by compressor, heat exchanger, choke valve and evaporimeter, and is delivered in the water of heat pump water-heating machine by this heat.Compared to heat pump water-heating machine of the prior art, the hot water machine that the present embodiment provides has the water pump that DC regulates, and this water pump can regulate pump rotary speed arbitrarily, i.e. the piping flow of any adjusting heat pump hot water machine heat exchanger water inlet pipe and water outlet pipe.Two temperature sensor T are provided with in water tank
water tank 1and T
water tank 2, T
water tank 2being located at water tank bottom, for obtaining the water temperature of water tank bottom, by observing the temperature of two temperature sensors whether consistent, can judging that whether Water in Water Tanks temperature is even.
The embodiment of the present invention additionally provides a kind of water pump control method of heat pump water-heating machine, and the method can perform based on the pump control unit of above-mentioned heat pump water-heating machine.
Fig. 4 is the flow chart of the water pump control method of heat pump water-heating machine according to the embodiment of the present invention.
As shown in Figure 4, the water pump control method of this heat pump water-heating machine comprises following step S402 to step S410.
Step S402, determines the heating capacity of unit in heat pump water-heating machine.
The heating capacity of unit also can be called the heating capacity of main frame or the heating capacity of system, usually represents with Q.For different environment temperatures, the heating capacity of unit is different.
Particularly, under different environment temperatures, the evaporation degree of evaporimeter is different, even if the rotating speed of compressor is identical, the heating capacity of unit is also different, therefore needs experiment test, the heating capacity of unit corresponding under drawing different ambient temperature conditions.
Table 1 is the mapping table of environment temperature and unit capacity in the present embodiment, for rated capacity 10kW unit:
Table 1
Step S404, obtains the inflow temperature of heat exchanger in heat pump water-heating machine.
What detect for the temperature sensor after ensureing start in heat exchanger inlet pipeline is the real temperature value in water tank bottom but not water temperature in pipeline, preferably, can carry out certain preparation for measuring inflow temperature.Such as, before compressor operating, control adjustable speed water pump running, obtain inflow temperature by the temperature sensor be arranged in heat-pump hot-water machine heat exchanger inlet pipeline.
In the present embodiment, can before unit start, allow a period of time t that DC water pump need first run, now DC water pump need run up with preset rotation speed, so that the water in heat pump water-heating machine pipeline is delivered to water tank fast, and will be full of the water extracted out from water tank in pipeline.
Before compressor operating, by the rotating speed of default water pump, water in water lines is got back in water tank fast, be pumped through from water tank the water come by being full of in pipeline, generally arrange water pump to run (comparatively large discharge or maximum stream flow are run) with larger rotating speed or maximum (top) speed, by the displacement can carrying out water fast that runs up, such as, this unit (10kw) runs with the rotating speed of 3500 revs/min or 4000 revs/min, generally rotating speed need pre-set as required, such as, determine according to the experiment of unit.
The span of t is 0.1min-5min, and concrete value formula is as follows:
Wherein, di is the water pipe internal diameter of water system i-th short tube, and unit is m,
Li is the water pipe total length of water system i-th short tube, and unit is m,
Q is the flow of water pump under preset rotation speed, and unit is L/min.
Generally speaking: the t that pipeline is short, caliber is little gets the small value, the t that pipeline is long, caliber is large takes large values, and all changes the water inside water tank into the water guaranteed inside by pipeline, the true water temperature of what in pipeline, temperature sensor detected is water tank bottom.
Above preparation can be called as the stage of running up, and this stage carried out before step S402.After the stage of running up terminates, DC water pump enters the rapid ramping stage, that is, start to perform step S402.
Step S406, according to the water flow in heating capacity, inflow temperature and design temperature determination heat pump water-heating machine, design temperature is preset by user.
Required flow M(L/min is calculated above according to selected Q, current Ts and Ti), computing formula is as follows:
Wherein, M is water flow, and Q is heating capacity, and Ts is design temperature, and Ti is inflow temperature, and Cp is that specific heat of water holds.
Step S408, obtains the rotating speed of target of adjustable speed water pump according to water flow.
Particularly, the corresponding relation of unit water system pump rotary speed and flow can first be obtained.Then obtain rotating speed of target corresponding to water flow according to unit water system pump rotary speed with the corresponding relation of flow, be
the corresponding relation of unit water system pump rotary speed and flow can be tested to obtain according to early stage, and flow is not only relevant with the rotating speed of water pump, also relevant with the pressure of intake-outlet with the resistance of pipeline.Identical at pump rotary speed, but when Inlet and outlet water pressure is different, water pump lift is different, thus causes flow in pipeline different, therefore needs experiment test, draws the corresponding relation of unit water system pump rotary speed and flow.
Table 2 is corresponding relations of pump rotary speed and flow system flow in the present embodiment:
Table 2
Step S410, controls adjustable speed water pump and improves rotating speed to reach rotating speed of target.
?
after determining, then basis
the initial speed of water pump is determined with Te
dC water pump is adjusted to by running up at once
rotating speed runs, wherein
determination as follows:
As Te > 35 DEG C,
When 20 DEG C of < Te≤35 DEG C,
When 7 DEG C of < Te≤20 DEG C,
When Te≤7 DEG C,
Wherein, Δ R1, Δ R2, Δ R3 and Δ R4 are alternation speed discrepancy, and Δ R1≤Δ R2≤Δ R3≤Δ R4 such as, R1=100, Δ R2=150, Δ R3=200, Δ R4=250.
For the actual value of Δ R1, Δ R2, Δ R3 and Δ R4, main relevant with main frame heating capacity size under different temperatures: when environment temperature is low, main frame heating capacity is little, then alternation speed discrepancy takes large values; During environment temperature height, main frame heating capacity is large, then alternation speed discrepancy gets the small value.Such uniformity that can ensure the leaving water temperature rate of climb within the rapid ramping stage.
In the present embodiment, the size of rotating speed of target can regulate according to water flow.
In this step, generally get 1-5min at time t1() in DC water pump rotating speed by
progressively adjust to
adjustment cycle is Δ t1, namely generally gets 1-15s every Δ t1() adjust a tachometer value, adjusting range is △ r1; In the t1 of rotational speed quick regulating, in real time according to the calculating revise goal rotating speed of current Ts, Ti and Te
and new rotating speed of target is adjusted within the remaining time
Wherein " r
current" be current tachometer value, " t1
residue" be the time remaining in t1 regulation time, unit is second.
By above step, hot water machine rapid hot water output after powering can be ensured.
Stablize the deviation of rear leaving water temperature and design temperature to eliminate unit operation fast, the operation for the later stage controls to lay a solid foundation, preferably, after the step s 410, and can by regulating the rotating speed of adjustable speed water pump to regulate the leaving water temperature of heat exchanger to design temperature.Operation after step S410 can as the elimination deviation stage.
Particularly, in this stage, from
start, generally get 5-30s every Δ t2() adjust the tachometer value of a DC water pump.
Concrete adjustment algorithm is:
TempR=TempR
last time+ △ r2,
△r2=e*Kt1+De*Kt2，
Wherein, TempR is the current rotating speed of water pump, TempR
last timefor the rotating speed before testing pump, △ r2 is rotational speed regulation amplitude, and e is the difference of current leaving water temperature and design temperature, and De is the difference of the inflow temperature before current inflow temperature and pump rotary speed regulate, Kt1 and Kt2 is respectively coefficient, such as, and Kt1=10, Kt2=50.
Generally get 1-5min entering the t2(eliminated after the deviation control stage) after, if meet To=Ts, then eliminate the deviation stage and terminate.
Enter eliminate deviation control stage t3(generally get 2-10min and t3 > t2) after still do not meet To=Ts, then eliminate the deviation stage also terminate.
Relatively, according to the magnitude relationship of current leaving water temperature and design temperature, separated in time increases by a small margin or reduces pump rotary speed, until leaving water temperature equals design temperature for this stage leaving water temperature and design temperature.This stage also takes into account the change of coolant-temperature gage, makes corresponding adjustment to rotating speed, ensures that leaving water temperature does not change because inflow temperature change.
Fig. 5 is the control schematic diagram according to the embodiment of the present invention, as shown in Figure 5, by making water pump run up in the stage of running up, then the rapid ramping stage by adjustment of rotational speed to initial speed after progressively adjust to rotating speed of target, then at interval of certain hour, pump rotary speed is finely tuned in the elimination deviation stage, thus export the hot water of design temperature fast after achieving start.
As can be seen from the above description, the embodiment of the present invention achieves following technique effect:
1, ensure unit rapid hot water output, and the impact of inflow temperature change can be eliminated, ensure that system water flow (being also DC pump rotary speed) moment and current unit capacity match.
2, eliminate the deviation that unit operation stablizes rear leaving water temperature and design temperature fast, the operation for the later stage controls to lay a solid foundation, and prevents follow-up causing because deviation is excessive from controlling overshoot, thus makes leaving water temperature recurrent fluctuations.Take into account the impact that coolant-temperature gage changes simultaneously, eliminated the effects of the act by pump rotary speed response.
It should be noted that, can perform in the computer system of such as one group of computer executable instructions in the step shown in the flow chart of accompanying drawing, and, although show logical order in flow charts, but in some cases, can be different from the step shown or described by order execution herein.
Obviously, those skilled in the art should be understood that, above-mentioned of the present invention each module or each step can realize with general calculation element, they can concentrate on single calculation element, or be distributed on network that multiple calculation element forms, alternatively, they can realize with the executable program code of calculation element, thus, they can be stored and be performed by calculation element in the storage device, or they are made into each integrated circuit modules respectively, or the multiple module in them or step are made into single integrated circuit module to realize.Like this, the present invention is not restricted to any specific hardware and software combination.
The foregoing is only the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various modifications and variations.Within the spirit and principles in the present invention all, any amendment done, equivalent replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (21)
1. a water pump control method for heat pump water-heating machine, is characterized in that, comprising:
Determine the heating capacity of unit in heat pump water-heating machine;
Obtain the inflow temperature of heat exchanger in described heat pump water-heating machine;
According to the water flow in described heating capacity, described inflow temperature and design temperature determination heat pump water-heating machine, wherein, described design temperature is preset by user;
The rotating speed of target of adjustable speed water pump is obtained according to described water flow; And
Control described adjustable speed water pump and improve rotating speed to reach described rotating speed of target;
After the described adjustable speed water pump of control rotates with described rotating speed of target, described method also comprises: by regulating the rotating speed of described adjustable speed water pump to regulate the leaving water temperature of described heat exchanger to described design temperature; Wherein, the rotating speed TempR=TempR of described adjustable speed water pump is regulated according to following formula
last time+ △ r2, △ r2=e*Kt1+De*Kt2, wherein, TempR is the current rotating speed of water pump, TempR
last timefor the rotating speed before testing pump, △ r2 is rotational speed regulation amplitude, and e is the difference of current leaving water temperature and design temperature, and De is the difference of the inflow temperature before current inflow temperature and pump rotary speed regulate, Kt1 and Kt2 is respectively coefficient.
2. the water pump control method of heat pump water-heating machine according to claim 1, is characterized in that, controls described adjustable speed water pump raising rotating speed and comprises to reach described rotating speed of target:
Control described adjustable speed water pump and rotating speed is adjusted to described rotating speed of target from initial speed, wherein, described initial speed is determined according to following formula:
As environment temperature Te > 35 DEG C, initial speed ▼ r=rotating speed of target ▼ R-Δ R1,
When 20 DEG C of < Te≤35 DEG C, ▼ r=▼ R-Δ R2,
When 7 DEG C of < Te≤20 DEG C, ▼ r=▼ R-Δ R3,
When Te≤7 DEG C, ▼ r=▼ R-Δ R4,
Wherein, Δ R1, Δ R2, Δ R3 and Δ R4 are alternation speed discrepancy, and Δ R1≤Δ R2≤Δ R3≤Δ R4.
3. the water pump control method of heat pump water-heating machine according to claim 2, is characterized in that,
The size of described rotating speed of target can regulate according to described water flow.
4. the water pump control method of heat pump water-heating machine according to claim 2, is characterized in that, controls described adjustable speed water pump and rotating speed is adjusted to described rotating speed of target from initial speed comprises:
The speed governing amplitude of described adjustable speed water pump is determined according to following formula:
Adjusting range △ r1=(rotating speed of target ▼ R – r
current)/(t1
residue/ Δ t1),
Wherein, r
currentfor current rotating speed, t1
residuefor the time remaining in t1 regulation time, Δ t1 is adjustment cycle.
5. the water pump control method of heat pump water-heating machine according to claim 4, is characterized in that,
The span of described adjustment cycle Δ t1 is 1 to 15 second.
6. the water pump control method of heat pump water-heating machine according to claim 1, is characterized in that, comprises according to the water flow in described heating capacity, described inflow temperature and design temperature determination heat pump water-heating machine:
Described water flow is determined according to following formula:
Wherein, M is water flow, and Q is heating capacity, and Ts is design temperature, and Ti is inflow temperature, and Cp is that specific heat of water holds.
7. the water pump control method of heat pump water-heating machine according to claim 6, is characterized in that, the rotating speed of target obtaining adjustable speed water pump according to described water flow comprises:
Obtain the corresponding relation of unit water system pump rotary speed and flow; And
Described rotating speed of target corresponding to described water flow is obtained according to described unit water system pump rotary speed and the corresponding relation of flow.
8. the water pump control method of heat pump water-heating machine according to claim 1, is characterized in that, obtains inflow temperature and comprises:
Before compressor operating, control the running of described adjustable speed water pump; And
Described inflow temperature is obtained by the temperature sensor be arranged in the water inlet pipe pipeline of described heat exchanger.
9. the water pump control method of heat pump water-heating machine according to claim 8, is characterized in that, controls the running of described adjustable speed water pump and comprises:
Control described adjustable speed water pump to operate by preset rotation speed, wherein, determine the time operated according to following formula:
Wherein, d
ifor the water pipe internal diameter of water system i-th short tube, l
ifor the water pipe total length of water system i-th short tube, q is the flow of water pump under described preset rotation speed.
10. the water pump control method of heat pump water-heating machine according to claim 1, is characterized in that, comprises to regulate the leaving water temperature of described heat exchanger by regulating the rotating speed of described adjustable speed water pump:
Often through prefixed time interval, regulate the rotating speed of described adjustable speed water pump, wherein, described prefixed time interval is 5 to 30 seconds.
The pump control unit of 11. 1 kinds of heat pump water-heating machines, is characterized in that, comprising:
First determining unit, for determining the heating capacity of unit in heat pump water-heating machine;
First acquiring unit, for obtaining the inflow temperature of heat exchanger in described heat pump water-heating machine;
Second determining unit, for according to the water flow in described heating capacity, described inflow temperature and design temperature determination heat pump water-heating machine, wherein, described design temperature is preset by user;
Second acquisition unit, for obtaining the rotating speed of target of adjustable speed water pump according to described water flow; And
Control unit, improves rotating speed to reach described rotating speed of target for controlling described adjustable speed water pump;
Described pump control unit also comprises: regulon, for the rotating speed by the described adjustable speed water pump of adjustment to regulate the leaving water temperature of described heat exchanger to described design temperature; Wherein, described regulon is also for regulating the rotating speed of described adjustable speed water pump according to following formula: TempR=TempR
last time+ △ r2, △ r2=e*Kt1+De*Kt2, wherein, TempR is the current rotating speed of water pump, TempR
last timefor the rotating speed before testing pump, △ r2 is rotational speed regulation amplitude, and e is the difference of current leaving water temperature and design temperature, and De is the difference of the inflow temperature before current inflow temperature and pump rotary speed regulate, Kt1 and Kt2 is respectively coefficient.
The pump control unit of 12. heat pump water-heating machines according to claim 11, is characterized in that,
Rotating speed is also adjusted to described rotating speed of target from initial speed for controlling described adjustable speed water pump by described control unit, and wherein, described initial speed is determined according to following formula:
As environment temperature Te > 35 DEG C, initial speed ▼ r=rotating speed of target ▼ R-Δ R1,
When 20 DEG C of < Te≤35 DEG C, ▼ r=▼ R-Δ R2,
When 7 DEG C of < Te≤20 DEG C, ▼ r=▼ R-Δ R3,
When Te≤7 DEG C, ▼ r=▼ R-Δ R4,
Wherein, Δ R1, Δ R2, Δ R3 and Δ R4 are alternation speed discrepancy, and Δ R1≤Δ R2≤Δ R3≤Δ R4.
The pump control unit of 13. heat pump water-heating machines according to claim 12, is characterized in that,
The size of described rotating speed of target can regulate according to described water flow.
The pump control unit of 14. heat pump water-heating machines according to claim 12, is characterized in that, described control unit is also for controlling the adjusting range of described adjustable speed water pump according to following formula:
Adjusting range △ r1=(rotating speed of target ▼ R – r
current)/(t1
residue/ Δ t1),
Wherein, r
currentfor current rotating speed, t1
residuefor the time remaining in t1 regulation time, Δ t1 is adjustment cycle.
The pump control unit of 15. heat pump water-heating machines according to claim 14, is characterized in that,
The span of described adjustment cycle Δ t1 is 1 to 15 second.
The pump control unit of 16. heat pump water-heating machines according to claim 11, is characterized in that, described second determining unit is also for determining described water flow according to following formula:
Wherein, M is water flow, and Q is heating capacity, and Ts is design temperature, and Ti is inflow temperature, and Cp is that specific heat of water holds.
The pump control unit of 17. heat pump water-heating machines according to claim 16, is characterized in that, described second acquisition unit comprises:
First obtains subelement, for obtaining the corresponding relation of unit water system pump rotary speed and flow; And
Second obtains subelement, for obtaining described rotating speed of target corresponding to described water flow according to described unit water system pump rotary speed and the corresponding relation of flow.
The pump control unit of 18. heat pump water-heating machines according to claim 11, is characterized in that, described first acquiring unit comprises:
Control subelement, for before compressor operating, control the running of described adjustable speed water pump; And
3rd obtains subelement, for obtaining described inflow temperature by the temperature sensor be arranged in the water inlet pipe pipeline of described heat exchanger.
The pump control unit of 19. heat pump water-heating machines according to claim 18, is characterized in that,
Controlling subelement also to operate by preset rotation speed for controlling described adjustable speed water pump, wherein, determining the time operated according to following formula:
Wherein, d
ifor the water pipe internal diameter of water system i-th short tube, l
ifor the water pipe total length of water system i-th short tube, q is the flow of water pump under described preset rotation speed.
The pump control unit of 20. heat pump water-heating machines according to claim 11, is characterized in that,
Described regulon also for often through prefixed time interval, regulates the rotating speed of described adjustable speed water pump, and wherein, described prefixed time interval is 5 to 30 seconds.
21. 1 kinds of heat pump water-heating machines, is characterized in that, comprise the pump control unit of the heat pump water-heating machine described in any one of claim 11 to 20.
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| CN104896749B (en) * | 2014-03-04 | 2017-08-08 | 珠海格力电器股份有限公司 | The control method and control system of a kind of Teat pump boiler |
| CN104807268B (en) * | 2015-04-22 | 2017-07-25 | 广东芬尼克兹节能设备有限公司 | The starting mode of pump control method and system of a kind of heat pump |
| CN106196596B (en) * | 2016-08-23 | 2019-07-23 | 南京天加空调设备有限公司 | A kind of control method of directly-heated type air-source heat pump hot water |
| CN108444110B (en) * | 2018-04-11 | 2019-06-25 | 南通大学 | Air source heat pump hot water system design method based on BP neural network forecast |
| CN109210789B (en) * | 2018-09-21 | 2020-07-31 | 宁波奥克斯电气股份有限公司 | Air source heat pump control method and device and air source heat pump |
| CN110638328B (en) * | 2019-10-25 | 2021-05-28 | 四川长虹电器股份有限公司 | Self-adaptive heating method of intelligent instant heating type direct drinking machine |
| CN113357829A (en) * | 2021-06-22 | 2021-09-07 | 海信(广东)厨卫系统股份有限公司 | Control method and device of water heater |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| JP2005016760A (en) * | 2003-06-24 | 2005-01-20 | Hitachi Home & Life Solutions Inc | Heat pump type water heater |
| CN101910747A (en) * | 2008-01-10 | 2010-12-08 | 日立空调·家用电器株式会社 | Heat-pump hot-water supply apparatus |
-
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2005016760A (en) * | 2003-06-24 | 2005-01-20 | Hitachi Home & Life Solutions Inc | Heat pump type water heater |
| CN101910747A (en) * | 2008-01-10 | 2010-12-08 | 日立空调·家用电器株式会社 | Heat-pump hot-water supply apparatus |
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