CN105928199A - Heat pump water heater and defrosting control method and device thereof - Google Patents
Heat pump water heater and defrosting control method and device thereof Download PDFInfo
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- CN105928199A CN105928199A CN201610264892.5A CN201610264892A CN105928199A CN 105928199 A CN105928199 A CN 105928199A CN 201610264892 A CN201610264892 A CN 201610264892A CN 105928199 A CN105928199 A CN 105928199A
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- defrost
- heat pump
- pump water
- heating machine
- temperature
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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
- F24H4/00—Fluid heaters characterised by the use of heat pumps
- F24H4/02—Water heaters
-
- 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
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
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- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The invention discloses a heat pump water heater and a defrosting control method and device thereof. The method comprises the following steps that when the heat pump water heater enters a defrosting mode, the water inlet temperature of the heat pump water heater during defrosting of previous N times is obtained, and the quitted defrosting coiler temperature during defrosting of last time is obtained; the change trend of the water inlet temperature during defrosting of previous N times is judged; and the quitted defrosting coiler temperature of the heat pump water heater during defrosting of last time is corrected according to the change trend of the water inlet temperature, the quitted defrosting coiler temperature of the current defrosting period is obtained accordingly, and defrosting control over the heat pump water heater is conducted according to the quitted defrosting coiler temperature of the current defrosting period. Accordingly, the purposes of achieving thorough defrosting and solving the problem of too-high high pressure prone to happening in the defrosting process are achieved, the water heating quality is improved, stable running in a water heating mode is guaranteed, and the direct cost of materials of a unit is not increased.
Description
Technical field
The present invention relates to hot water machine technical field, particularly to a kind of heat pump water-heating machine and defrosting control method thereof and device.
Background technology
Heat pump water-heating machine there will be frost when water heating pattern, particularly at Central China and region, North China, temperature in the winter time
Low and run into rainy, snow, dense fog or continuously under the adverse circumstances such as cloudy day, heat pump water-heating machine is more prone to frost occur.
And, during defrost, owing to air humidity conference causes the heat exchanger frosting of unit seriously, and then cause defrost the most thorough
The end, affect water heating effect；Separately the heat exchanger frosting at unit seriously and performs defrost in the case of maintaining high leaving water temperature,
If defrost overlong time and leaving water temperature are too high, then the high-pressure moment of system rises quickly, and the system that ultimately results in occurs
High voltage protective phenomenon.
In correlation technique, solve, by by-pass collar or increase relief valve, the problem that defrost is clean and high-pressure is too high,
But these methods are all built upon increasing on the direct material cost of heat pump water-heating machine.
Summary of the invention
It is contemplated that one of technical problem solved the most to a certain extent in correlation technique.To this end, the one of the present invention
Purpose is to propose the defrosting control method of a kind of heat pump water-heating machine, when the method passes through the variation tendency of inflow temperature to defrost
The defrost coil temperature that exits be modified, and according to the revised defrost coil temperature that exits, heat pump water-heating machine is carried out defrost
Control, thus reach defrost and totally and during solving defrost, the purpose that high pressure is too high easily occurs, and do not increase the material of unit
Material direct cost.
Further object is that the defrosting control device proposing a kind of heat pump water-heating machine.
A further object of the present invention is to propose a kind of heat pump water-heating machine.
For achieving the above object, one aspect of the present invention embodiment proposes the defrosting control method of a kind of heat pump water-heating machine, including
Following steps: when described heat pump water-heating machine enters defrost pattern, described heat when obtaining n times defrost before described heat pump water-heating machine
The inflow temperature of pump hot water machine, and exit defrost coil temperature, wherein, N when obtaining described heat pump water-heating machine last time defrost
For the integer more than or equal to 3；The variation tendency of inflow temperature when judging described front n times defrost；And according to described water inlet
Exit defrost coil temperature when the variation tendency of temperature is to described heat pump water-heating machine last time defrost and be modified to obtain described
The heat pump water-heating machine current defrost cycle exit defrost coil temperature, and exit defrost coil pipe according to the described current defrost cycle
Temperature carries out defrosting control to described heat pump water-heating machine.
The defrosting control method of the heat pump water-heating machine of the embodiment of the present invention, when heat pump water-heating machine enters defrost pattern, obtains heat
Inflow temperature during n times defrost before pump hot water machine, and exit defrost coil temperature when obtaining the defrost of heat pump water-heating machine last time,
Then, it is judged that the variation tendency of inflow temperature during front n times defrost, and according to the variation tendency of inflow temperature to heat-pump hot-water
The defrost coil temperature that the exits during defrost of machine last time is modified, and exits defrost coil temperature with obtain the current defrost cycle,
Finally, according to the defrost coil temperature that exits in current defrost cycle, heat pump water-heating machine is carried out defrosting control, thus reach defrost
Clean easily there is, during solving defrost, the purpose that high pressure is too high, improves the quality of unit water heating and ensures that unit is being made
Stable operation under hot-water mode, and do not increase the material direct cost of unit.
According to one embodiment of present invention, according to the variation tendency of described inflow temperature to the described heat pump water-heating machine last time
During frost exit that defrost coil temperature is modified obtaining the described heat pump water-heating machine current defrost cycle exit defrost coil pipe temperature
Degree inflow temperature, including: if described inflow temperature is in rising trend, the most described current defrost cycle exit defrost coil pipe
Exit, when temperature is described last defrost, the temperature compensation value that defrost coil temperature superposition is preset；If described inflow temperature
On a declining curve, exiting of the most described current defrost cycle exits defrost dish when defrost coil temperature is described last defrost
Pipe temperature deducts described default temperature compensation value；If described inflow temperature is in neither ascendant trend also non-decreasing trend, then
Exiting of described current defrost cycle exits defrost coil temperature when defrost coil temperature is described last defrost.
According to one embodiment of present invention, defrost coil temperature is exited to described Heat Pump according to the described current defrost cycle
Water machine carries out defrosting control, including: obtain the current coil temperature of described heat pump water-heating machine；Judge described current coil temperature
Whether exit defrost coil temperature more than or equal to described current period, and whether judge the defrost time of described heat pump water-heating machine
Reach default defrost required time；If described current coil temperature exits defrost coil pipe more than or equal to described current period
Temperature and described defrost time reach described default defrost required time, then control described heat pump water-heating machine and exit defrost pattern.
According to one embodiment of present invention, during described heat pump water-heating machine defrost, the compression in described heat pump water-heating machine
Machine is in running status, and the outdoor fan in described heat pump water-heating machine is out of service.
For achieving the above object, another aspect of the present invention embodiment proposes the defrosting control device of a kind of heat pump water-heating machine, bag
Include: the first acquisition module, for when described heat pump water-heating machine enters defrost pattern, obtaining n times before described heat pump water-heating machine
The inflow temperature of described heat pump water-heating machine during defrost, wherein, N is the integer more than or equal to 3；Second acquisition module, is used for
When described heat pump water-heating machine enters defrost pattern, when obtaining described heat pump water-heating machine last time defrost, exit defrost coil pipe temperature
Degree；Judge module, described judge module is connected with described first acquisition module, and described judge module is used for judging described front N
The variation tendency of inflow temperature during secondary defrost；And control module, described control module respectively with described second acquisition module
Being connected with described judge module, described control module is used for the variation tendency according to described inflow temperature to described heat pump water-heating machine
The defrost coil temperature that exits during last defrost is modified obtaining the exiting in described heat pump water-heating machine current defrost cycle
Frost coil temperature, and according to the defrost coil temperature that exits in described current defrost cycle, described heat pump water-heating machine is carried out defrost control
System.
The defrosting control device of the heat pump water-heating machine of the embodiment of the present invention, when heat pump water-heating machine enters defrost pattern, by the
One acquisition module obtains inflow temperature during n times defrost before heat pump water-heating machine, and obtains heat-pump hot-water by the second acquisition module
Exit defrost coil temperature during the defrost of machine last time, then, control module judge before n times defrost time the change of inflow temperature
Change trend, and according to the variation tendency of inflow temperature to the defrost of heat pump water-heating machine last time time exit defrost coil temperature and carry out
Revising, exit defrost coil temperature with obtain the current defrost cycle, finally, control module is moved back according to the current defrost cycle
Go out defrost coil temperature and heat pump water-heating machine is carried out defrosting control, thus reach defrost and totally and easily go out during solving defrost
The purpose that existing high pressure is too high, improves the quality of unit water heating and ensures unit stable operation under water heating pattern.
According to one embodiment of present invention, described control module in the variation tendency according to described inflow temperature to described heat pump
The defrost coil temperature that the exits during defrost of hot water machine last time is modified obtaining the described heat pump water-heating machine current defrost cycle
When exiting defrost coil temperature, wherein, if described inflow temperature is in rising trend, exiting of the most described current defrost cycle
Exit, when defrost coil temperature is described last defrost, the temperature compensation value that defrost coil temperature superposition is preset；If it is described
Inflow temperature is on a declining curve, the most described current defrost cycle exit moving back when defrost coil temperature is described last defrost
Go out defrost coil temperature and deduct described default temperature compensation value；If described inflow temperature is in neither ascendant trend also non-decreasing
Trend, exiting of the most described current defrost cycle exits defrost coil temperature when defrost coil temperature is described last defrost.
According to one embodiment of present invention, the defrosting control device of above-mentioned heat pump water-heating machine, also include: the 3rd obtains mould
Block, described 3rd acquisition module is connected with described control module, and described 3rd acquisition module is used for obtaining described heat pump water-heating machine
Current coil temperature, wherein, described control module judges that described current coil temperature is whether more than or equal to described current period
Exit defrost coil temperature, and judge whether the defrost time of described heat pump water-heating machine reaches default defrost required time,
If described current coil temperature more than or equal to described current period exit defrost coil temperature and the described defrost time reaches institute
When stating default defrost required time, described control module then controls described heat pump water-heating machine and exits defrost pattern.
According to one embodiment of present invention, during described heat pump water-heating machine defrost, the compression in described heat pump water-heating machine
Machine is in running status, and the outdoor fan in described heat pump water-heating machine is out of service.
Additionally, embodiments of the invention also proposed a kind of heat pump water-heating machine, it includes the defrost control of above-mentioned heat pump water-heating machine
Device processed.
The heat pump water-heating machine of the embodiment of the present invention, by above-mentioned defrosting control device, it is possible to reach that defrost is clean and solutionization
The purpose that high pressure is too high easily occurs during frost, the quality improving water heating and the stable operation ensured under water heating pattern,
Improve Consumer's Experience.
Accompanying drawing explanation
Fig. 1 is the flow chart of the defrosting control method of heat pump water-heating machine according to embodiments of the present invention.
Fig. 2 is the block diagram of the defrosting control device of heat pump water-heating machine according to embodiments of the present invention.
Fig. 3 is the block diagram of the defrosting control device of heat pump water-heating machine according to an embodiment of the invention.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, the most identical
Or similar label represents same or similar element or has the element of same or like function.Retouch below with reference to accompanying drawing
The embodiment stated is exemplary, it is intended to is used for explaining the present invention, and is not considered as limiting the invention.
The heat pump water-heating machine and defrosting control method thereof and dress proposed according to embodiments of the present invention is described with reference to the accompanying drawings
Put.
Fig. 1 is the flow chart of the defrosting control method of heat pump water-heating machine according to embodiments of the present invention.As it is shown in figure 1, this heat
The defrosting control method of pump hot water machine comprises the following steps:
S1, when heat pump water-heating machine enters defrost pattern, the water inlet of heat pump water-heating machine during n times defrost before acquisition heat pump water-heating machine
Temperature, and exit defrost coil temperature when obtaining the defrost of heat pump water-heating machine last time, wherein, N is whole more than or equal to 3
Number.
According to one embodiment of present invention, during heat pump water-heating machine defrost, the compressor in heat pump water-heating machine is in fortune
Row state, the outdoor fan in heat pump water-heating machine is out of service.
S2, it is judged that the variation tendency of inflow temperature during front n times defrost.
Specifically, during heat pump water-heating machine is with water heating mode operation, if judging to meet according to associated control logic
Defrost condition, then control heat pump water-heating machine and enter defrost pattern: the commutation of compressor operating, cross valve, outdoor fan stop fortune
OK.During defrost, the coil temperature of set heat exchange device constantly raises, when coil temperature reaches to exit defrost condition,
Control heat pump water-heating machine and exit defrost pattern: the commutation of compressor operating, cross valve, outdoor fan bring into operation.
Owing to the defrost condition that exits of heat pump water-heating machine is limited by coil temperature, and coil temperature is according to during each defrost
The variation tendency of inflow temperature, therefore, in an embodiment of the present invention, can be come by the variation tendency of the inflow temperature of acquisition
Control coil temperature when every time exiting defrost pattern and defrost time.
S3, exits defrost coil temperature during according to the variation tendency of inflow temperature to the defrost of heat pump water-heating machine last time and repaiies
Just exit defrost coil temperature with obtain the heat pump water-heating machine current defrost cycle, and exit defrost according to the current defrost cycle
Coil temperature carries out defrosting control to heat pump water-heating machine.
According to one embodiment of present invention, according to the variation tendency of inflow temperature to the defrost of heat pump water-heating machine last time time move back
Go out that defrost coil temperature is modified obtaining the heat pump water-heating machine current defrost cycle exits defrost coil temperature inflow temperature,
Including: if inflow temperature is in rising trend, then the exiting when defrost coil temperature is last defrost of current defrost cycle
Exit the temperature compensation value that defrost coil temperature superposition is preset；If inflow temperature is on a declining curve, then current defrost cycle
Exiting defrost coil temperature is that the defrost coil temperature that exits during last defrost deducts default temperature compensation value；If water inlet
Temperature in neither ascendant trend also non-decreasing trend, then when exiting defrost coil temperature for last defrost of current defrost cycle
Exit defrost coil temperature.
According to one embodiment of present invention, according to the defrost coil temperature that exits in current defrost cycle, heat pump water-heating machine is carried out
Defrosting control, including: obtain the current coil temperature of heat pump water-heating machine；Judge that whether current coil temperature is more than or equal to current
Cycle exit defrost coil temperature, and judge whether the defrost time of heat pump water-heating machine reaches default defrost required time；
If current coil temperature exits defrost coil temperature and needed for the defrost time reaches default defrost more than or equal to current period
Time, then control heat pump water-heating machine and exit defrost pattern.
The present invention is described in detail for radix starting point below with inflow temperature during first three defrost.
Specifically, during each heat pump water-heating machine runs first three defrost of water heating pattern, if coil temperature TDish Pipe>=exit defrost coil temperature Ts and the defrost time exceedes the defrost required time such as N second, then terminate defrost.Simultaneously before record
Inflow temperature T during three defrostsWater inlet 1、TWater inlet 2、TWater inlet 3, and inflow temperature T when judging first three time defrostWater inlet 1、TWater inlet 2、
TWater inlet 3Variation tendency.
If inflow temperature T during first three defrostWater inlet 1、TWater inlet 2、TWater inlet 3In neither ascendant trend also non-decreasing trend, then exist
During 4th defrost, as coil temperature TCoil pipeWhen >=Ts and defrost time exceed defrost required time N second, terminate defrost.
5th defrost then variation tendency of inflow temperature during first three time defrost according to it, follow-up the like.
If inflow temperature T during first three defrostWater inlet 1、TWater inlet 2、TWater inlet 3In rising trend, i.e. TWater inlet 1＜ TWater inlet 2＜ TWater inlet 3
＜ Tmax (Tmax is heat pump water-heating machine maximum water temperature), the most next exits coil temperature T during defrostCoil pipeAccording to such as
Lower formula adjusts:
During 1st defrost, work as TCoil pipe 1>=Ts-Δ T and defrost time, more than the N second, terminate defrost；
During 2nd defrost, work as TCoil pipe 2>=T1-Δ T and defrost time, more than the N second, terminate defrost, and wherein, T1 is
Defrost coil temperature, i.e. T1=Ts-Δ T is exited during the 1st defrost；
... the like；
During n-th defrost, work as TCoil pipe N≥TN-1-Δ T and defrost time, more than the N second, terminate defrost.
If inflow temperature T during first three defrostWater inlet 1、TWater inlet 2、TWater inlet 3On a declining curve, i.e. TWater inlet 1＞ TWater inlet 2＞ TWater inlet 3,
The most next coil temperature T during defrost is exitedCoil pipeAdjust according to equation below:
During 1st defrost, work as TCoil pipe 1>=Ts+ Δ T and defrost time, more than the N second, terminate defrost；
During 2nd defrost, work as TCoil pipe 2>=T1+ Δ T and defrost time, more than the N second, terminate defrost, and wherein, T1 is
Defrost coil temperature, i.e. T1=Ts+ Δ T is exited for the first time during defrost；
... the like；
During n-th defrost, work as TCoil pipe N≥TN-1+ Δ T and defrost time, more than the N second, terminate defrost.
It should be noted that temperature difference compensation value Δ T can set according to practical situation, when using region, making use difference, Δ
T value also can be different, and such as Δ T can be 0.5,1,1.5 or 2 etc. with value.Defrost required time can preset,
Can also regulate in real time according to exiting defrost coil temperature.
Further, according to a concrete example of the present invention, in heat pump water-heating machine work process, record first three time adjacent
Inflow temperature during defrost is respectively TWater inlet 1、TWater inlet 2、TWater inlet 3, and heat pump water-heating machine third time defrost time exit defrost coil pipe
Temperature is Ts.When heat pump water-heating machine will perform the 4th defrost, to inflow temperature T during first three defrost recordedWater inlet 1、TWater inlet 2、TWater inlet 3Judge.
If inflow temperature T during first three defrostWater inlet 1、TWater inlet 2、TWater inlet 3In rising trend, i.e. TWater inlet 1＜ TWater inlet 2＜ TWater inlet 3
＜ Tmax, then exit defrost coil temperature T during the 4th defrostCoil pipe 4=Ts-△ T.That is, during the 4th defrost,
If the coil temperature of detection reaches to exit defrost coil temperature T in real timeCoil pipe 4, then exit the 4th defrost, and start to heat
Aqueous mode runs.
After heat pump water-heating machine heats a period of time, if meeting defrost condition, then start to perform the 5th defrost.Will hold
During the 5th defrost of row, obtain inflow temperature during first three defrost, and it is judged.If examined during the 4th defrost
The inflow temperature surveyed is TWater inlet 4, and TWater inlet 3＜ TWater inlet 4＜ Tmax, then for the 5th defrost, first three defrost
Time inflow temperature TWater inlet 2、TWater inlet 3、TWater inlet 4The most in rising trend, i.e. TWater inlet 2＜ TWater inlet 3＜ TWater inlet 4＜ Tmax, then the 5th time
Defrost coil temperature T is exited during defrostCoil pipe 5=TCoil pipe 4-△T。
Then, if the inflow temperature of detection is T during the 5th defrostWater inlet 5, and TWater inlet 4＞ TWater inlet 5, then relative to the 6th
Inflow temperature T for secondary defrost, during first three defrostWater inlet 3、TWater inlet 4、TWater inlet 5In neither ascendant trend also non-decreasing trend,
Then exit defrost coil temperature T during the 6th defrostCoil pipe 6=TCoil pipe 5。
Then, if the inflow temperature of detection is T during the 6th defrostWater inlet 6, and TWater inlet 5＞ TWater inlet 6, then relative to the 7th
Inflow temperature T for secondary defrost, during first three defrostWater inlet 4、TWater inlet 5、TWater inlet 6On a declining curve, i.e. TWater inlet 4＞ TWater inlet 5＞
TWater inlet 6, then defrost coil temperature T is exited during the 7th defrostCoil pipe 7=TCoil pipe 6+ △ T, follow-up the like, until Heat Pump
Water machine receives off signal, and heat pump water-heating machine is out of service.After heat pump water-heating machine works on power, continue to patrol according to above-mentioned
Collect and heat pump water-heating machine is carried out defrosting control.
In sum, no matter the defrosting control method of the heat pump water-heating machine of the embodiment of the present invention, after shutting down in the middle of heat pump water-heating machine
Start, or start shooting after fault, when heat pump water-heating machine enters defrost pattern every time, before the most first obtaining during n times defrost
The variation tendency of inflow temperature during n times defrost before inflow temperature, and judgement, then, further according to variation tendency with default
The control logic automatic accumulation superposition of design is adjusted, and temperature difference compensation value is increased or decreased and determines coil temperature when exiting defrost
Optimum, it is achieved accurately intelligent defrosting, be finally reached defrost clean and reduce system high pressure hypertonia during defrost
Effect, improves the water heating quality of heat pump water-heating machine, it is ensured that user uses coolant-temperature gage and water consumption, is Heat Pump simultaneously
The stable operation of water machine provides Reliable guarantee, improves the quality and satisfaction of heat pump water-heating machine.
Fig. 2 is the block diagram of the defrosting control device of heat pump water-heating machine according to embodiments of the present invention.As in figure 2 it is shown, this heat pump
The defrosting control device of hot water machine includes: first acquisition module the 10, second acquisition module 20, judge module 30 and control mould
Block 40.
Wherein, the first acquisition module 10 is for when heat pump water-heating machine enters defrost pattern, obtaining n times before heat pump water-heating machine
The inflow temperature of heat pump water-heating machine during frost, wherein, N is the integer more than or equal to 3.Second acquisition module 20 is at heat pump
Hot water machine enter defrost pattern time, obtain the defrost of heat pump water-heating machine last time time exit defrost coil temperature.Judge module 30
It is connected with the first acquisition module 10, it is judged that the variation tendency of inflow temperature when module 30 is for judging front n times defrost.Control
Molding block 40 is connected with the second acquisition module 20 and judge module 30 respectively, and control module 40 is for according to inflow temperature
Exiting defrost coil temperature when variation tendency is to the defrost of heat pump water-heating machine last time, to be modified obtaining heat pump water-heating machine current
The defrost cycle exit defrost coil temperature, and according to the defrost coil temperature that exits in current defrost cycle, heat pump water-heating machine is entered
Row defrosting control, and do not increase the material direct cost of unit.
According to one embodiment of present invention, during heat pump water-heating machine defrost, the compressor in heat pump water-heating machine is in fortune
Row state, the outdoor fan in heat pump water-heating machine is out of service.
Specifically, during heat pump water-heating machine is with water heating mode operation, if judging to meet according to associated control logic
Defrost condition, control module 40 then controls heat pump water-heating machine and enters defrost pattern: compressor operating, cross valve commutate, outdoor
Blower fan is out of service.During defrost, the coil temperature of set heat exchange device constantly raises, when coil temperature reaches exiting
During ice-lolly part, control module 40 controls heat pump water-heating machine and exits defrost pattern: compressor operating, cross valve commutate, outdoor wind
Machine brings into operation.
Owing to the defrost condition that exits of heat pump water-heating machine is limited by coil temperature, and coil temperature is according to during each defrost
The variation tendency of inflow temperature, therefore, in an embodiment of the present invention, can be come by the variation tendency of the inflow temperature of acquisition
Control coil temperature when every time exiting defrost pattern and defrost time.Then, according to the variation tendency of inflow temperature to heat pump
The defrost coil temperature that the exits during defrost of hot water machine last time is modified, to obtain moving back of heat pump water-heating machine current defrost cycle
Go out defrost coil temperature, and according to the defrost coil temperature that exits in current defrost cycle, heat pump water-heating machine is carried out defrosting control.
According to one embodiment of present invention, control module 40 in the variation tendency according to inflow temperature on heat pump water-heating machine one
During secondary defrost exit that defrost coil temperature is modified obtaining the heat pump water-heating machine current defrost cycle exit defrost coil pipe temperature
When spending, wherein, if inflow temperature is in rising trend, then the defrost coil temperature that exits in current defrost cycle is last timeization
Frost time exit defrost coil temperature superposition preset temperature compensation value；If inflow temperature is on a declining curve, then current defrost
The defrost coil temperature that exits in cycle is that the defrost coil temperature that exits during last defrost deducts default temperature compensation value；As
Really inflow temperature is in neither ascendant trend also non-decreasing trend, then the defrost coil temperature that exits in current defrost cycle is the last time
Defrost coil temperature is exited during defrost.
According to one embodiment of present invention, as it is shown on figure 3, the defrosting control device of above-mentioned heat pump water-heating machine also includes:
3rd acquisition module 50, the 3rd acquisition module 50 is connected with control module 40, and the 3rd acquisition module 50 is used for obtaining heat pump
The current coil temperature of hot water machine, wherein, control module 40 judges whether current coil temperature is more than or equal to moving back of current period
Go out defrost coil temperature, and judge whether the defrost time of heat pump water-heating machine reaches default defrost required time, if currently
Coil temperature exits defrost coil temperature and time the defrost time reaches default defrost required time more than or equal to current period,
Control module 40 then controls heat pump water-heating machine and exits defrost pattern.
The present invention is described in detail for radix starting point below with inflow temperature during first three defrost.
Specifically, during each heat pump water-heating machine runs first three defrost of water heating pattern, if coil temperature TDish Pipe>=exit defrost coil temperature Ts and the defrost time exceedes the defrost required time such as N second, then terminate defrost.Simultaneously before record
Inflow temperature T during three defrostsWater inlet 1、TWater inlet 2、TWater inlet 3, and inflow temperature T when judging first three time defrostWater inlet 1、TWater inlet 2、
TWater inlet 3Variation tendency.
If it is determined that inflow temperature T when module 30 judges first three time defrostWater inlet 1、TWater inlet 2、TWater inlet 3In neither ascendant trend also
Non-decreasing trend, then during the 4th defrost, when during the 4th defrost, as coil temperature TCoil pipe>=Ts and change
When the frost time exceedes defrost required time N second, terminate defrost.5th defrost then water inlet temperature during first three time defrost according to it
The variation tendency of degree, follow-up the like.
If inflow temperature T during first three defrostWater inlet 1、TWater inlet 2、TWater inlet 3In rising trend, i.e. TWater inlet 1＜ TWater inlet 2＜ TWater inlet
3＜ Tmax, the most next exits coil temperature T during defrostCoil pipeAdjust according to equation below:
During 1st defrost, work as TCoil pipe 1>=Ts-Δ T and defrost time, more than the N second, terminate defrost；
During 2nd defrost, work as TCoil pipe 2>=T1-Δ T and defrost time, more than the N second, terminate defrost, and wherein, T1 is
Defrost coil temperature, i.e. T1=Ts-Δ T is exited during the 1st defrost；
... the like；
During n-th defrost, work as TCoil pipe N≥TN-1-Δ T and defrost time, more than the N second, terminate defrost.
If inflow temperature T during first three defrostWater inlet 1、TWater inlet 2、TWater inlet 3On a declining curve, i.e. TWater inlet 1＞ TWater inlet 2＞ TWater inlet 3,
The most next coil temperature T during defrost is exitedCoil pipeAdjust according to equation below:
During 1st defrost, work as TCoil pipe 1>=Ts+ Δ T and defrost time, more than the N second, terminate defrost；
During 2nd defrost, work as TCoil pipe 2>=T1+ Δ T and defrost time, more than the N second, terminate defrost, and wherein, T1 is
Defrost coil temperature, i.e. T1=Ts+ Δ T is exited for the first time during defrost；
... the like；
During n-th defrost, work as TCoil pipe N≥TN-1+ Δ T and defrost time, more than the N second, terminate defrost.
It should be noted that temperature difference compensation value Δ T can set according to practical situation, when using region, making use difference, Δ
T value also can be different, and such as Δ T can be 0.5,1,1.5 or 2 etc. with value.Defrost required time can preset,
Can also regulate in real time according to exiting defrost coil temperature.
Further, according to a concrete example of the present invention, in heat pump water-heating machine work process, the first acquisition module 10
Inflow temperature when obtaining adjacent first three defrost is respectively TWater inlet 1、TWater inlet 2、TWater inlet 3, and the second acquisition module 20 obtains heat
The defrost coil temperature that exits during pump hot water machine third time defrost is Ts.When heat pump water-heating machine will perform the 4th defrost,
Judge module 30 is to inflow temperature T during first three defrost obtainedWater inlet 1、TWater inlet 2、TWater inlet 3Judge.
If inflow temperature T during first three defrostWater inlet 1、TWater inlet 2、TWater inlet 3In rising trend, i.e. TWater inlet 1＜ TWater inlet 2＜ TWater inlet 3
＜ Tmax, then exit defrost coil temperature T when control module 40 calculates the 4th defrostCoil pipe 4=Ts-△ T.That is, the 4th
During secondary defrost, if the coil temperature that the 3rd acquisition module 50 detects in real time reaches to exit defrost coil temperature TCoil pipe 4,
Then control module 40 controls heat pump water-heating machine and exits the 4th defrost, and controls heat pump water-heating machine and start to transport with water heating pattern
OK.
After heat pump water-heating machine heats a period of time, if meeting defrost condition, then start to perform the 5th defrost.Will hold
During the 5th defrost of row, the first acquisition module 10 obtains inflow temperature during first three defrost, it is judged that module 30 is to acquisition
Inflow temperature judges.If the inflow temperature of detection is T during the 4th defrostWater inlet 4, and TWater inlet 3＜ TWater inlet 4＜ Tmax,
Inflow temperature T so for the 5th defrost, during first three defrostWater inlet 2、TWater inlet 3、TWater inlet 4It is the most in rising trend,
I.e. TWater inlet 2＜ TWater inlet 3＜ TWater inlet 4＜ Tmax, then exit defrost coil temperature T when control module 40 calculates the 5th defrostCoil pipe 5=TCoil pipe 4-△T。
Then, if the inflow temperature of detection is T during the 5th defrostWater inlet 5, and TWater inlet 4＞ TWater inlet 5, then relative to the 6th
Inflow temperature T for secondary defrost, during first three defrostWater inlet 3、TWater inlet 4、TWater inlet 5In neither ascendant trend also non-decreasing trend,
Defrost coil temperature T is exited when then control module 40 calculates the 6th defrostCoil pipe 6=TCoil pipe 5。
Then, if the inflow temperature of detection is T during the 6th defrostWater inlet 6, and TWater inlet 5＞ TWater inlet 6, then relative to the 7th
Inflow temperature T for secondary defrost, during first three defrostWater inlet 4、TWater inlet 5、TWater inlet 6On a declining curve, i.e. TWater inlet 4＞ TWater inlet 5＞
TWater inlet 6, then defrost coil temperature T is exited when control module 40 calculates the 7th defrostCoil pipe 7=TCoil pipe 6+ △ T, follow-up class successively
Pushing away, until heat pump water-heating machine receives off signal, heat pump water-heating machine is out of service.After heat pump water-heating machine works on power,
Continue, according to above-mentioned logic, heat pump water-heating machine is carried out defrosting control.
In sum, no matter the defrosting control device of the heat pump water-heating machine of the embodiment of the present invention, after shutting down in the middle of heat pump water-heating machine
Start, or start shooting after fault, when heat pump water-heating machine enters defrost pattern every time, before the most first obtaining during n times defrost
The variation tendency of inflow temperature during n times defrost before inflow temperature, and judgement, then, further according to variation tendency with default
The control logic automatic accumulation superposition of design is adjusted, and temperature difference compensation value is increased or decreased and determines coil temperature when exiting defrost
Optimum, it is achieved accurately intelligent defrosting, be finally reached defrost clean and reduce system high pressure hypertonia during defrost
Effect, improves the water heating quality of heat pump water-heating machine, it is ensured that user uses coolant-temperature gage and water consumption, is Heat Pump simultaneously
The stable operation of water machine provides Reliable guarantee, improves the quality and satisfaction of heat pump water-heating machine.
Additionally, embodiments of the invention also proposed a kind of heat pump water-heating machine, it includes the defrost control of above-mentioned heat pump water-heating machine
Device processed.
The heat pump water-heating machine of the embodiment of the present invention, by above-mentioned defrosting control device, it is possible to reach that defrost is clean and solutionization
The purpose that high pressure is too high easily occurs during frost, the quality improving water heating and the stable operation ensured under water heating pattern,
Improve Consumer's Experience.
In describing the invention, it is to be understood that term " first ", " second " are only used for describing purpose, and can not
It is interpreted as instruction or hint relative importance or the implicit quantity indicating indicated technical characteristic.Thus, define " the
One ", the feature of " second " can express or implicitly include at least one this feature.In describing the invention, " multiple "
It is meant that at least two, such as two, three etc., unless otherwise expressly limited specifically.
In the present invention, unless otherwise clearly defined and limited, term " install ", " being connected ", " connection ", " fixing "
Should be interpreted broadly Deng term, connect for example, it may be fixing, it is also possible to be to removably connect, or integral；Can be
It is mechanically connected, it is also possible to be electrical connection；Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be two
The connection of individual element internal or the interaction relationship of two elements, unless otherwise clear and definite restriction.Common for this area
For technical staff, above-mentioned term concrete meaning in the present invention can be understood as the case may be.
In the description of this specification, reference term " embodiment ", " some embodiments ", " example ", " specifically show
Example " or the description of " some examples " etc. means to combine this embodiment or example describes specific features, structure, material or
Feature is contained at least one embodiment or the example of the present invention.In this manual, the schematic representation to above-mentioned term
Necessarily it is directed to identical embodiment or example.And, the specific features of description, structure, material or feature are permissible
One or more embodiment in office or example combine in an appropriate manner.Additionally, in the case of the most conflicting, ability
The feature of the different embodiments described in this specification or example and different embodiment or example can be entered by the technical staff in territory
Row combines and combination.
Although above it has been shown and described that embodiments of the invention, it is to be understood that above-described embodiment is exemplary,
Being not considered as limiting the invention, those of ordinary skill in the art within the scope of the invention can be to above-described embodiment
It is changed, revises, replaces and modification.
Claims (9)
1. the defrosting control method of a heat pump water-heating machine, it is characterised in that comprise the following steps:
When described heat pump water-heating machine enters defrost pattern, described heat-pump hot-water when obtaining n times defrost before described heat pump water-heating machine
The inflow temperature of machine, and exit defrost coil temperature when obtaining described heat pump water-heating machine last time defrost, wherein, N is big
In the integer equal to 3；
The variation tendency of inflow temperature when judging described front n times defrost；And
Exit defrost coil temperature when variation tendency according to described inflow temperature is to described heat pump water-heating machine last time defrost to enter
Row correction exits defrost coil temperature with the acquisition described heat pump water-heating machine current defrost cycle, and according to described current defrost week
The defrost coil temperature that exits of phase carries out defrosting control to described heat pump water-heating machine.
The defrosting control method of heat pump water-heating machine the most according to claim 1, it is characterised in that according to described water inlet temperature
Exit defrost coil temperature when the variation tendency of degree is to described heat pump water-heating machine last time defrost to be modified obtaining described heat
The pump hot water machine current defrost cycle exit defrost coil temperature inflow temperature, including:
If described inflow temperature is in rising trend, the defrost coil temperature that exits in the most described current defrost cycle is described upper one
During secondary defrost exit defrost coil temperature superposition preset temperature compensation value；
If described inflow temperature is on a declining curve, the defrost coil temperature that exits in the most described current defrost cycle is described upper one
The defrost coil temperature that exits during secondary defrost deducts described default temperature compensation value；
If described inflow temperature is in neither ascendant trend also non-decreasing trend, the most described current defrost cycle exit defrost dish
Defrost coil temperature is exited when pipe temperature is described last defrost.
The defrosting control method of heat pump water-heating machine the most according to claim 1 and 2, it is characterised in that work as according to described
The defrost coil temperature that exits in front defrost cycle carries out defrosting control to described heat pump water-heating machine, including:
Obtain the current coil temperature of described heat pump water-heating machine；
Judge that whether described current coil temperature exits defrost coil temperature more than or equal to described current period, and judge described
Whether the defrost time of heat pump water-heating machine reaches default defrost required time；
If described current coil temperature more than or equal to described current period exit defrost coil temperature and the described defrost time reaches
To described default defrost required time, then control described heat pump water-heating machine and exit defrost pattern.
The defrosting control method of heat pump water-heating machine the most according to claim 1, it is characterised in that at described heat-pump hot-water
During machine defrost, the compressor in described heat pump water-heating machine is in running status, the outdoor fan in described heat pump water-heating machine
Out of service.
5. the defrosting control device of a heat pump water-heating machine, it is characterised in that including:
First acquisition module, for when described heat pump water-heating machine enters defrost pattern, obtaining n times before described heat pump water-heating machine
The inflow temperature of described heat pump water-heating machine during defrost, wherein, N is the integer more than or equal to 3；
Second acquisition module, for when described heat pump water-heating machine enters defrost pattern, obtaining described heat pump water-heating machine last
Defrost coil temperature is exited during defrost；
Judge module, described judge module is connected with described first acquisition module, and described judge module is used for judging described front N
The variation tendency of inflow temperature during secondary defrost；And
Control module, described control module is connected with described second acquisition module and described judge module respectively, described control mould
Block is for exiting defrost coil temperature during according to the variation tendency of described inflow temperature to described heat pump water-heating machine last time defrost
Be modified obtaining the described heat pump water-heating machine current defrost cycle exits defrost coil temperature, and according to described current defrost
The defrost coil temperature that exits in cycle carries out defrosting control to described heat pump water-heating machine.
The defrosting control device of heat pump water-heating machine the most according to claim 1, it is characterised in that described control module exists
Exit defrost coil temperature when variation tendency according to described inflow temperature is to described heat pump water-heating machine last time defrost to repair
Just to obtain when exiting defrost coil temperature of described heat pump water-heating machine current defrost cycle, wherein,
If described inflow temperature is in rising trend, the defrost coil temperature that exits in the most described current defrost cycle is described upper one
During secondary defrost exit defrost coil temperature superposition preset temperature compensation value；
If described inflow temperature is on a declining curve, the defrost coil temperature that exits in the most described current defrost cycle is described upper one
The defrost coil temperature that exits during secondary defrost deducts described default temperature compensation value；
If described inflow temperature is in neither ascendant trend also non-decreasing trend, the most described current defrost cycle exit defrost dish
Defrost coil temperature is exited when pipe temperature is described last defrost.
7. according to the defrosting control device of the heat pump water-heating machine described in claim 5 or 6, it is characterised in that also include:
3rd acquisition module, described 3rd acquisition module is connected with described control module, and described 3rd acquisition module is used for obtaining
The current coil temperature of described heat pump water-heating machine, wherein,
Described control module judges that whether described current coil temperature exits defrost coil pipe temperature more than or equal to described current period
Degree, and judge whether the defrost time of described heat pump water-heating machine reaches default defrost required time, if described current coil pipe
Temperature exits defrost coil temperature and needed for the described defrost time reaches described default defrost more than or equal to described current period
During the time, described control module then controls described heat pump water-heating machine and exits defrost pattern.
The defrosting control device of heat pump water-heating machine the most according to claim 7, it is characterised in that at described heat-pump hot-water
During machine defrost, the compressor in described heat pump water-heating machine is in running status, the outdoor fan in described heat pump water-heating machine
Out of service.
9. a heat pump water-heating machine, it is characterised in that include according to the heat pump water-heating machine according to any one of claim 5-8
Defrosting control device.
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| WO2020056956A1 (en) * | 2018-09-21 | 2020-03-26 | 珠海格力电器股份有限公司 | Defrosting control method and device for heat pump unit, storage medium, and heat pump unit |
| CN111023453A (en) * | 2019-12-25 | 2020-04-17 | 宁波奥克斯电气股份有限公司 | Air conditioner defrosting control method and device, air conditioner and storage medium |
| CN111174374A (en) * | 2020-01-06 | 2020-05-19 | 珠海格力电器股份有限公司 | Control method and device of air conditioner, storage medium and air conditioner |
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| CN105928199B (en) | 2019-03-12 |
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