CN110425747A - A kind of variable frequency pump control method suitable for frequency conversion heat pump water heater - Google Patents
A kind of variable frequency pump control method suitable for frequency conversion heat pump water heater Download PDFInfo
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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
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Abstract
The invention discloses a kind of variable frequency pump control methods suitable for frequency conversion heat pump water heater, control method has specifically included following steps: dynamic monitoring mode is enabled during Teat pump boiler stable operation, under dynamic monitoring mode, inflow temperature T1 at real-time monitoring water-side heat, leaving water temperature T2 and water flow Q, wherein, only when the water flow Q of real-time monitoring is greater than scheduled minimum water flow Qmin, side calculates the temperature difference absolute value determined between inflow temperature T1 and leaving water temperature T2 | Δ T |, to which determining temperature difference absolute value will be calculated in real time | Δ T | the upshift temperature value Ta and downshift temperature value Tb for being presently in ability gear with variable frequency pump compare judgement, the ability gear of variable frequency pump is then correspondingly adjusted based on judging result.
Description
Technical field
The present invention relates to the technical fields of air-conditioning system, refer in particular to a kind of frequency conversion water suitable for frequency conversion heat pump water heater
Method for controlling pump.
Background technique
Much the Teat pump boiler with frequency conversion function matches the water pump that can only be manually adjusted substantially currently on the market, and
Because appearance reason usually these water pumps are installed in outdoor unit or indoor unit, it is difficult after primary adjustment again according to heat pump
Ability make corresponding adjustment.Also, water flow parameter is an extremely important parameter in the operation of heat pump, and adjustment is not
When being easy to appear following problems in the operation in heat pump:
1) in operation of heat pump refrigeration mode, the water flow of heat pump is very few to be easy to cause icing, blocking even freezing heat exchanger
Consequence；
2) water flow of heat pump is excessive, and the disengaging water temperature difference of heat pump becomes smaller.Under same leaving water temperature, disengaging water temperature difference becomes
The small average heat exchange temperature difference reduction that will lead to refrigerant and water, keeps the efficiency of heat pump worse.
Therefore, variable frequency pump is applied in frequency conversion heat pump water heater, it can be automatic right according to Teat pump boiler part throttle characteristics
Pipeline water flow is adjusted, and improves the efficiency of Teat pump boiler, reduces the noise of pipeline.
Summary of the invention
It is an object of the invention to overcome the deficiencies of the prior art and provide a kind of frequency conversions suitable for frequency conversion heat pump water heater
Water pump control method.
In order to achieve the above purpose, a kind of variable frequency pump control suitable for frequency conversion heat pump water heater provided by the present invention
Method processed, including water-side heat and the variable frequency pump being connected to water-side heat and heating terminal, in advance by variable frequency pump
It is incremented by by fan-out capability and is divided into several grades of ability gears, wherein every level-one ability gear is correspondingly provided with upshift temperature value and downshift
Temperature value, control method have specifically included following steps:
Dynamic monitoring mode is enabled during Teat pump boiler stable operation, under dynamic monitoring mode, real-time monitoring water side is changed
Inflow temperature T1, leaving water temperature T2 and water flow Q at hot device, wherein only when the water flow Q of real-time monitoring be greater than it is scheduled most
When weep amount Qmin, side calculates the temperature difference absolute value determined between inflow temperature T1 and leaving water temperature T2 | Δ T |, thus will
Determining temperature difference absolute value is calculated in real time | Δ T | the upshift temperature value Ta and downshift of ability gear are presently in variable frequency pump
Temperature value Tb compares judgement, and the ability gear of variable frequency pump is then correspondingly adjusted based on judging result.
A kind of variable frequency pump control method suitable for frequency conversion heat pump water heater according to claim 1, feature
It is: during Teat pump boiler stable operation, if monitor that water flow Q is less than or equal to minimum water flow Qmin, moves back
Dynamic monitoring pattern out then enables variable frequency pump based on current ability gear, up-regulation level-one ability gear and limitation capability
Gear is lowered.
Further, during Teat pump boiler stable operation, once temperature difference absolute value | Δ T | it is greater than or equal to scheduled
Maximum temperature difference value | Δ T | when max, then dynamic monitoring mode is exited, then enables variable frequency pump based on current ability gear, on
It adjusts level-one ability gear and limitation capability gear is lowered.
Further, after variable frequency pump raises level-one ability gear, water is continued to monitor in scheduled monitoring time section t4
Flow Q, wherein if occur water flow Q again less than or equal to minimum water flow Qmin, the gear of variable frequency pump is restored
To default gear, and by reactivate dynamic monitoring mould again after the scheduled reset time section T5 of default capabilities gear continuous service
Formula.
Further, it after variable frequency pump raises level-one ability gear, is continued to monitor in scheduled monitoring time section t4
Inflow temperature T1 and leaving water temperature T2, and calculating temperature difference absolute value in real time | Δ T |, wherein if occurring temperature difference absolute value again |
Δ T | it is greater than or equal to maximum temperature difference value | Δ T | when max, then the gear of variable frequency pump is restored to default gear, and by with silent
Dynamic monitoring mode is reactivated again after recognizing the scheduled reset time section T5 of ability gear continuous service.
Further, when Teat pump boiler just starts, when variable frequency pump is first scheduled initial with the operation of default capabilities gear
Between after section t1, judgement is monitored to the press frequency F of water flow Q and compressor, wherein when water flow Q be greater than it is scheduled
Minimum water flow Qmin and press frequency F are greater than or equal to scheduled default frequency, and side assert that Teat pump boiler at this time is in
Stable operation, subsequent start-up dynamic monitoring mode.
Further, under dynamic monitoring mode, when temperature difference absolute value | Δ T | ability shelves are presently in greater than variable frequency pump
When the upshift temperature value Ta of position, then variable frequency pump raise level-one ability gear based on current ability gear, and to raise after
The scheduled adjustment time section t2 of ability gear continuous service after, again according to the inflow temperature T1 and leaving water temperature of real-time monitoring
T2 is recalculated and is determined new temperature difference absolute value | Δ T |, then by new temperature difference absolute value | Δ T | with the ability after up-regulation
The corresponding upshift temperature value Ta of gear compares judgement, wherein new temperature difference absolute value | Δ T | still it is greater than corresponding
Upshift temperature value Ta when, then continue to raise level-one ability gear, such circulating repetition, until temperature difference absolute value | Δ T | be not more than
After corresponding upshift temperature value Ta or variable frequency pump reach maximum capacity gear, then the ability gear of variable frequency pump is no longer raised.
Further, under dynamic monitoring mode, when temperature difference absolute value | Δ T | ability shelves are presently in less than variable frequency pump
When the downshift temperature value Tb of position, then variable frequency pump lowers level-one ability gear based on current ability gear, and with downward after
The scheduled adjustment time section t2 of ability gear continuous service after, again according to the inflow temperature T1 and leaving water temperature of real-time monitoring
T2 is recalculated and is determined new temperature difference absolute value | Δ T |, then by new temperature difference absolute value | Δ T | with the ability after downward
The corresponding downshift temperature value Tb of gear compares judgement, wherein new temperature difference absolute value | Δ T | still it is greater than corresponding
When downshift temperature value Tb, then continue to lower level-one ability gear, such circulating repetition, until temperature difference absolute value | and Δ T | it is not less than
After corresponding downshift temperature value Tb or variable frequency pump reach minimum ability gear, then the ability gear of variable frequency pump is no longer lowered.
Further, under dynamic monitoring mode, when temperature difference absolute value | Δ T | ability shelves are presently between variable frequency pump
When between the upshift temperature value Ta and downshift temperature value Tb of position, then frequency conversion level keeps current ability gear continuous service.
Further, ability gears at different levels correspondence is set with a press frequency, wherein in variable frequency pump adjustment capability gear
Afterwards, compressor correspondingly adjust to press frequency corresponding to current ability gear.
The present invention uses above-mentioned scheme, the beneficial effect is that: (1) efficiency of Teat pump boiler is improved, is given full play to
The ability of Teat pump boiler；(2) noise because of the excessive pipeline of water flow is reduced, comfort is improved；(3) water can be further decreased
Energy consumption needed for pumping；(4) ensure Teat pump boiler reliability service.
Detailed description of the invention
Fig. 1 is the judgement schematic diagram of the temperature difference absolute value of embodiment.
Fig. 2 is the structural schematic diagram of the Teat pump boiler of embodiment.
Specific embodiment
To facilitate the understanding of the present invention, with reference to the accompanying drawings to invention is more fully described.It is given in attached drawing
Better embodiment of the invention.But the present invention can realize in many different forms, however it is not limited to described herein
Embodiment.The purpose of providing these embodiments is that making to understand more thorough and comprehensive to the disclosure.
Referring to figure 1, in the present embodiment, a kind of to be suitable for frequency conversion heat pump water heater, it include outdoor heat exchanger
1, water-side heat 2, compressor 3, variable frequency pump 4, flowmeter 5, water outlet temperature-sensing probe 6 and water inlet temperature-sensing probe 7, wherein water
The refrigerant flow of side heat exchanger 2 is connected with outdoor heat exchanger 1 and compressor 3, the water conservancy flow path and frequency conversion water of water-side heat 2
Pump 4 is connected with heating terminal, water outlet temperature-sensing probe 6 and temperature-sensing probe 7 of intaking be located at water-side heat 2 water outlet and
Water inlet, flowmeter 5 are located at 2 water outlet of water-side heat between heating terminal.
In the present embodiment, water inlet temperature-sensing probe 7 obtains the inflow temperature T1 of water-side heat 2 for real-time monitoring；Out
Water temperature-sensing probe 6 obtains the leaving water temperature T2 of water-side heat 2 for real-time monitoring；Flowmeter 5 obtains water for real-time monitoring
Flow Q.
It is made explanations explanation in conjunction with above-mentioned frequency conversion heat pump water heater with the control method to variable frequency pump.
Referring to shown in attached drawing 2, a kind of variable frequency pump control method suitable for frequency conversion heat pump water heater of the present embodiment, root
It is divided into several grades of ability gears according to actual Teat pump boiler type variable frequency pump to be incremented by by fan-out capability, wherein N grades
To be most high-grade, the fan-out capability of variable frequency pump is best；1st grade is deep low gear, and the fan-out capability of variable frequency pump is worst.Every gear ability
Gear is pre-defined upshift temperature value Ta and downshift temperature value Tb, wherein upshift temperature value Ta is greater than downshift temperature value Tb.
When Teat pump boiler just starts, each item is in original state, and therefore, variable frequency pump at this time is first to default
After ability gear runs scheduled initial time section t1, judgement is monitored to the press frequency F of water flow Q and compressor,
Wherein, when water flow Q be greater than scheduled minimum water flow Qmin(Q > Qmin) and press frequency F be greater than or equal to it is scheduled write from memory
Recognize frequency (F >=default frequency), side assert that Teat pump boiler at this time is in steady operational status, subsequent start-up dynamic monitoring mould
Formula.Conversely, when water flow Q is less than or equal to scheduled minimum water flow Qmin(Q≤Qmin) and press frequency F be less than it is scheduled
Default frequency (F < default frequency) then assert that Teat pump boiler at this time is in irregular operation state, to enable heat-pump hot-water
Device is monitored the press frequency F of water flow Q and compressor sentences again after one section of initial time section t1 of continuous service
It is disconnected, if being still in irregular operation state, mean that Teat pump boiler breaks down, then according to scheduled troubleshooting
Program sends a warning or terminates operation, this exception handles can carry out adaptability according to practical Teat pump boiler type and set
It is fixed, it is not construed as limiting herein.
Dynamic monitoring mode, under dynamic monitoring mode, real-time monitoring water are enabled during Teat pump boiler stable operation
Inflow temperature T1, leaving water temperature T2 and the water flow Q of side heat exchanger 2, wherein only make a reservation for when the water flow Q of real-time monitoring is greater than
Minimum water flow Qmin when (Q > Qmin), side calculate determine inflow temperature T1 and leaving water temperature T2 between temperature difference absolute value
| Δ T |, to calculate determining temperature difference absolute value for real-time | Δ T | the upshift temperature of ability gear is presently in variable frequency pump
Angle value Ta and downshift temperature value Tb compares judgement, that is, during Teat pump boiler operation, judgement is detected according to water flow Q
Whether it is in steady operational status, only the fan-out capability of variable frequency pump is adjusted under Teat pump boiler steady operational status
It is whole.Therefore, under dynamic monitoring mode, based on the temperature difference absolute value between inflow temperature T1 and leaving water temperature T2 | Δ T | (that is,
| Δ T |=| T1-T2 |), the upshift temperature value Ta and downshift temperature value Tb for being presently in ability gear with variable frequency pump compare and sentence
It is disconnected, so that the ability gear of variable frequency pump is correspondingly adjusted based on judging result, in order to make it easy to understand, below to judging result
Three kinds of situations are explained respectively.
Situation one: when temperature difference absolute value | Δ T | greater than the upshift temperature value Ta that variable frequency pump is presently in ability gear
When, that is, | Δ T | > current upshift temperature value Ta, then it represents that the demand increase of end-equipment leads to variable frequency pump at this time
Fan-out capability is insufficient and water flow Q is caused to reduce, and needs to increase the fan-out capability of variable frequency pump, therefore, variable frequency pump with
Level-one ability gear is raised based on current ability gear, and with the scheduled adjustment time of ability gear continuous service after up-regulation
Section t2, it is ensured that Teat pump boiler obtains enough time and is adjusted transition, convenient for accurately obtaining subsequent every detection parameters.
In addition, Teat pump boiler is after combustion adjustment time period t 2, inflow temperature T1 again according to real-time monitoring and go out
Coolant-temperature gage T2 is recalculated and is determined new temperature difference absolute value | Δ T |, then by new temperature difference absolute value | Δ T | after up-regulation
The corresponding upshift temperature value Ta of ability gear compare judgement, wherein if new temperature difference absolute value | Δ T | be still greater than
Then continue to raise level-one ability gear when corresponding upshift temperature value Ta, such circulating repetition, until temperature difference absolute value | Δ T
| be not more than corresponding upshift temperature value Ta(that is, | Δ T |≤upshift temperature value Ta) or variable frequency pump reach maximum capacity gear
Afterwards, then the ability gear of variable frequency pump is no longer raised.
Situation two: when temperature difference absolute value | Δ T | less than the downshift temperature value Tb that variable frequency pump is presently in ability gear
When, that is, | Δ T | < current upshift temperature value Ta, then it represents that the demand of end-equipment, which reduces, leads to variable frequency pump at this time
Fan-out capability is superfluous and water flow Q is caused to increase, and needs to reduce the fan-out capability of variable frequency pump, therefore, variable frequency pump with
Level-one ability gear is lowered based on current ability gear, and with the scheduled adjustment time of ability gear continuous service after downward
Section t2, it is ensured that Teat pump boiler obtains enough time and is adjusted transition, convenient for accurately obtaining subsequent every detection parameters.
In addition, Teat pump boiler is after combustion adjustment time period t 2, inflow temperature T1 again according to real-time monitoring and go out
Coolant-temperature gage T2 is recalculated and is determined new temperature difference absolute value | Δ T |, then by new temperature difference absolute value | Δ T | after downward
The corresponding downshift temperature value Tb of ability gear compare judgement, wherein if new temperature difference absolute value | Δ T | be still greater than
When corresponding downshift temperature value Tb, then continue to lower level-one ability gear, such circulating repetition, until temperature difference absolute value | Δ
T | it is not less than corresponding downshift temperature value Tb(| Δ T | >=upshift temperature value Tb) or after variable frequency pump reaches minimum ability gear,
Then no longer lower the ability gear of variable frequency pump.
Situation three: under dynamic monitoring mode, when temperature difference absolute value | Δ T | ability shelves are presently between variable frequency pump
When between the upshift temperature value Ta and downshift temperature value Tb of position, that is, current upshift temperature value Tb≤| Δ T |≤current upshift
Temperature value Ta, then it represents that the demand of end-equipment at this time is corresponding with the fan-out capability of variable frequency pump at this time, without to change
The fan-out capability of frequency water pump is adjusted, and therefore, frequency conversion level keeps current ability gear continuous service.
By above-mentioned three kinds of cited situations, in order to according to temperature difference absolute value | Δ T | the liter with current ability gear
Judgement is compared in shelves temperature value Ta and downshift temperature value Tb, carries out dynamic tune to the ability gear of variable frequency pump to realize
Section, it is automatic to select the most energy-efficient way of output under the premise of meeting the demand of end-equipment.
In the present embodiment, during enabling dynamic monitoring mode, if monitoring, water flow Q is less than or equal to minimum water flow
When measuring Qmin (Q≤Qmin), indicates that water yield of the variable frequency pump under current ability gear is insufficient at this time, need to improve output energy
Power, therefore, Teat pump boiler then exit dynamic monitoring mode, then enable variable frequency pump based on current ability gear, up-regulation
Level-one ability gear and the downward of limitation capability gear.In addition, after variable frequency pump raises level-one ability gear, in scheduled monitoring
Water flow Q is continued to monitor in time period t 4, wherein if (Q when occurring water flow Q again less than or equal to minimum water flow Qmin
≤ Qmin), then the gear of variable frequency pump is restored to default gear, and by with the scheduled resetting of default capabilities gear continuous service
Dynamic monitoring mode is reactivated after period T5 again, in this way, be equivalent to the fan-out capability of variable frequency pump into
Row resetting, then re-starts adjustment by default gear.
In the present embodiment, ability gears at different levels correspondence is set with a press frequency, wherein adjusts energy in variable frequency pump
After power gear, compressor is correspondingly adjusted to press frequency corresponding to current ability gear can have in this way
The situation for avoiding to effect the fan-out capability of compressor superfluous or insufficient, and the ability shelves of compressor press frequency and variable frequency pump
It is proportional between position and synchronizes adjustment.
In addition, setting a maximum temperature difference value in order to further ensure the stable operation of Teat pump boiler | Δ T | max with
For calculating determining temperature difference absolute value in real time | Δ T | judgement is compared, that is, during Teat pump boiler stable operation, once
Temperature difference absolute value | Δ T | it is greater than or equal to scheduled maximum temperature difference value | Δ T | when max (| Δ T | >=| Δ T | max), then exit
Dynamic monitoring mode then enables variable frequency pump based on current ability gear, up-regulation level-one ability gear and limitation capability shelves
Position is lowered, and in this way, is solved when end-equipment demand is more than the ability need of current gear, and not in time
Contrast judgement temperature difference absolute value | Δ T | upshift temperature value Ta between relationship and variable frequency pump is adjusted, with realize force
Raise the output gear of variable frequency pump.In addition, after variable frequency pump raises level-one ability gear, in scheduled monitoring time section t4
The inflow temperature T1 and leaving water temperature T2 inside continued to monitor, and calculating temperature difference absolute value in real time | Δ T |, wherein if occurring again
Temperature difference absolute value | Δ T | it is greater than or equal to maximum temperature difference value | Δ T | when max, then the gear of variable frequency pump is restored to default shelves
Position, and by reactivate dynamic monitoring mode again after the scheduled reset time section T5 of default capabilities gear continuous service.Pass through
Such mode is equivalent to and resets to the fan-out capability of variable frequency pump, then re-starts adjustment by default gear.
In conclusion by during Teat pump boiler stable operation, monitor whether to occur Q≤Qmin or | Δ T | >=| Δ
T | the case where max, it is adjusted so as to the output gear in time to variable frequency pump, it is ensured that the operation of Teat pump boiler is steady
It is fixed reliable.
Further, in order to make it easy to understand, above-mentioned control method has specifically included following steps:
S1. when Teat pump boiler just starts, variable frequency pump first runs scheduled first time period t1 with default capabilities gear, with
Real-time monitoring is made to the inflow temperature T1 of water-side heat 2, leaving water temperature T2 and water flow Q afterwards；
S2. whether real-time judge water flow Q is greater than scheduled minimum water flow Qmin, wherein only when water flow Q is greater than minimum water
When flow Qmin, the temperature absolute value of the difference between confirmation inflow temperature T1 and leaving water temperature T2 is just calculated | Δ T |；
S3. the corresponding upshift temperature value of ability gear and downshift temperature value and current temperature difference are presently according to variable frequency pump
Absolute value | Δ T | be compared judgement, thus correspondingly to variable frequency pump make up-regulation or lower ability gear.
The embodiment of the above is only presently preferred embodiments of the present invention, not does limit in any form to the present invention
System.Anyone skilled in the art utilizes the skill of the disclosure above without departing from the scope of the technical proposal of the invention
Art content makes more possible variations and retouching to technical solution of the present invention, or modification is equivalent embodiment of the invention.
Therefore all contents without departing from technical solution of the present invention, the equivalent equivalence changes that thinking according to the present invention is done should all be covered by
In protection scope of the present invention.
Claims (10)
1. a kind of variable frequency pump control method suitable for frequency conversion heat pump water heater, including water-side heat and exchange heat with water side
The variable frequency pump that device is connected to heating terminal, it is characterised in that: variable frequency pump is incremented by by fan-out capability is divided into several grades in advance
Ability gear, wherein every level-one ability gear is correspondingly provided with upshift temperature value and downshift temperature value, control method have specifically included
Following steps:
Dynamic monitoring mode is enabled during Teat pump boiler stable operation, under dynamic monitoring mode, real-time monitoring water side is changed
Inflow temperature T1, leaving water temperature T2 and water flow Q at hot device, wherein only when the water flow Q of real-time monitoring be greater than it is scheduled most
When weep amount Qmin, side calculates the temperature difference absolute value determined between inflow temperature T1 and leaving water temperature T2 | Δ T |, thus will
Determining temperature difference absolute value is calculated in real time | Δ T | the upshift temperature value Ta and downshift of ability gear are presently in variable frequency pump
Temperature value Tb compares judgement, and the ability gear of variable frequency pump is then correspondingly adjusted based on judging result.
2. a kind of variable frequency pump control method suitable for frequency conversion heat pump water heater according to claim 1, feature exist
In: during Teat pump boiler stable operation, if monitor that water flow Q is less than or equal to minimum water flow Qmin, exit
Dynamic monitoring mode then enables variable frequency pump based on current ability gear, up-regulation level-one ability gear and limitation capability shelves
It lowers position.
3. a kind of variable frequency pump control method suitable for frequency conversion heat pump water heater according to claim 1, feature exist
In: during Teat pump boiler stable operation, once temperature difference absolute value | Δ T | it is greater than or equal to scheduled maximum temperature difference value | Δ
T | when max, then dynamic monitoring mode is exited, then enable variable frequency pump based on current ability gear, raises level-one ability shelves
Position and the downward of limitation capability gear.
4. a kind of variable frequency pump control method suitable for frequency conversion heat pump water heater according to claim 2, feature exist
In: after variable frequency pump raises level-one ability gear, water flow Q is continued to monitor in scheduled monitoring time section t4, wherein if
When occurring water flow Q again less than or equal to minimum water flow Qmin, then the gear of variable frequency pump is restored to default gear, and
By to reactivate dynamic monitoring mode again after the scheduled reset time section T5 of default capabilities gear continuous service.
5. a kind of variable frequency pump control method suitable for frequency conversion heat pump water heater according to claim 3, feature exist
In: after variable frequency pump raises level-one ability gear, the inflow temperature T1 that is continued to monitor in scheduled monitoring time section t4 and
Leaving water temperature T2, and calculating temperature difference absolute value in real time | Δ T |, wherein if occurring temperature difference absolute value again | Δ T | it is greater than or waits
In maximum temperature difference value | Δ T | when max, then the gear of variable frequency pump is restored to default gear, and held by with default capabilities gear
Dynamic monitoring mode is reactivated again after the scheduled reset time section T5 of reforwarding row.
6. a kind of variable frequency pump control method suitable for frequency conversion heat pump water heater according to claim 1, feature exist
In: when Teat pump boiler just starts, after variable frequency pump first runs scheduled initial time section t1 with default capabilities gear, to water
The press frequency F of flow Q and compressor is monitored judgement, wherein when water flow Q is greater than scheduled minimum water flow Qmin
And press frequency F is greater than or equal to scheduled default frequency, side assert that Teat pump boiler at this time is in stable operation, then opens
Dynamic dynamic monitoring mode.
7. a kind of variable frequency pump control method suitable for frequency conversion heat pump water heater according to claim 1, feature exist
In: under dynamic monitoring mode, when temperature difference absolute value | Δ T | greater than the upshift temperature that variable frequency pump is presently in ability gear
When value Ta, then variable frequency pump raises level-one ability gear based on current ability gear, and is held with the ability gear after raising
After the scheduled adjustment time section t2 of reforwarding row, again according to the inflow temperature T1 and leaving water temperature T2 of real-time monitoring, recalculate
Determine new temperature difference absolute value | Δ T |, then by new temperature difference absolute value | Δ T | it is corresponding with the ability gear after up-regulation
Upshift temperature value Ta compares judgement, wherein new temperature difference absolute value | Δ T | still greater than corresponding upshift temperature value Ta
When, then continue to raise level-one ability gear, such circulating repetition, until temperature difference absolute value | and Δ T | it is warm no more than corresponding upshift
After angle value Ta or variable frequency pump reach maximum capacity gear, then the ability gear of variable frequency pump is no longer raised.
8. a kind of variable frequency pump control method suitable for frequency conversion heat pump water heater according to claim 1, feature exist
In: under dynamic monitoring mode, when temperature difference absolute value | Δ T | less than the downshift temperature that variable frequency pump is presently in ability gear
When value Tb, then variable frequency pump lowers level-one ability gear based on current ability gear, and is held with the ability gear after lowering
After the scheduled adjustment time section t2 of reforwarding row, again according to the inflow temperature T1 and leaving water temperature T2 of real-time monitoring, recalculate
Determine new temperature difference absolute value | Δ T |, then by new temperature difference absolute value | Δ T | it is corresponding with the ability gear after downward
Downshift temperature value Tb compares judgement, wherein new temperature difference absolute value | Δ T | still it is greater than corresponding downshift temperature value Tb
When, then continue to lower level-one ability gear, such circulating repetition, until temperature difference absolute value | and Δ T | it is not less than corresponding downshift temperature
After angle value Tb or variable frequency pump reach minimum ability gear, then the ability gear of variable frequency pump is no longer lowered.
9. a kind of variable frequency pump control method suitable for frequency conversion heat pump water heater according to claim 6 or 7, feature
It is: under dynamic monitoring mode, when temperature difference absolute value | Δ T | the upshift temperature of ability gear is presently between variable frequency pump
When between angle value Ta and downshift temperature value Tb, then frequency conversion level keeps current ability gear continuous service.
10. a kind of variable frequency pump control method suitable for frequency conversion heat pump water heater according to claim 1, feature exist
In: ability gears at different levels correspondence is set with a press frequency, wherein after variable frequency pump adjustment capability gear, compressor phase
Adjust with answering to press frequency corresponding to current ability gear.
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| CN111120284A (en) * | 2019-12-26 | 2020-05-08 | 珠海格力电器股份有限公司 | Heat pump system and water pump control method thereof |
| CN111623526A (en) * | 2020-04-26 | 2020-09-04 | 青岛海信日立空调系统有限公司 | Flow control method and device of water heater and water heater |
| CN111707031A (en) * | 2020-05-25 | 2020-09-25 | 广东纽恩泰新能源科技发展有限公司 | Heat pump unit starting control method and system |
| CN113606782A (en) * | 2021-07-30 | 2021-11-05 | 宁波奥克斯电气股份有限公司 | Variable frequency control method and device of heat pump unit, storage medium and heat pump unit |
| WO2023071330A1 (en) * | 2021-10-26 | 2023-05-04 | 珠海格力电器股份有限公司 | Method and apparatus for regulating and controlling outlet water temperature of heat pump system, and heat pump system |
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| WO2023071330A1 (en) * | 2021-10-26 | 2023-05-04 | 珠海格力电器股份有限公司 | Method and apparatus for regulating and controlling outlet water temperature of heat pump system, and heat pump system |
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