CN104764263B - The defrosting control method and device of heat pump - Google Patents
The defrosting control method and device of heat pump Download PDFInfo
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- CN104764263B CN104764263B CN201410004345.4A CN201410004345A CN104764263B CN 104764263 B CN104764263 B CN 104764263B CN 201410004345 A CN201410004345 A CN 201410004345A CN 104764263 B CN104764263 B CN 104764263B
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- defrost
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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
- F25B47/00—Arrangements for preventing or removing deposits or corrosion, not provided for in another subclass
- F25B47/02—Defrosting cycles
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
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- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Air Conditioning Control Device (AREA)
Abstract
The embodiment of the invention discloses a kind of defrosting control method of heat pump, comprise the following steps：When meeting defrost entry condition in heat pump heating process, control heat pump carries out bypass defrosting, while recording the run time of defrost；Outdoor heat exchanger pipe temperature T5 is constantly obtained when defrost is run, during the first pipe temperature threshold value met when T5 is exited more than defrost, or when detecting the duration of operation of defrost more than t4, control heat pump exits defrost；The Guan Wen of outdoor heat exchanger porch when the pipe temperature T5 is refrigerating operaton；When the secondary condition for exiting defrost is to detect duration of operation of defrost to be more than t4, then current t4 is increased into preset value.The invention also discloses a kind of defrosting control device of heat pump.Present invention optimizes bypass defrosting, the ability of defrost is improved, so as to reduce the number of times of defrost, air conditioner reliability of operation is improved.
Description
Technical field
The present invention relates to the defrosting control method and device in heat pump field, more particularly to a kind of heat pump.
Background technology
During heat pump air conditioner is in heating operation, by outdoor heat exchanger and outdoor air heat exchange occurs for refrigerant, from
Outdoor air absorbs heat and evaporated.Compressor is compressed to the refrigerant of low-temp low-pressure, forms the refrigerant of HTHP
Steam, gets in heat exchanger heat release.Heat is released come heating indoor air by indoor heat exchanger, people is enjoyed and relatively relaxes
Suitable environment.
But, because outdoor heat exchanger absorbs heat from outdoor air, outdoor heat exchanger environment temperature is relatively low, in air
Vapor can condense into frost and be attached to outdoor heat exchanger surface, so as to influence the exchange capability of heat of outdoor heat exchanger, and then influence
The comfortableness of people.
It is many at present to be defrosted using bypass defrosting mode in order to solve the problems, such as the defrosting of above-mentioned air conditioner, and existing skill
Fixed defrosting post-set time is usually provided with art, i.e., when the bypass defrosting duration reaching preset time, then forces to move back
Go out bypass defrosting.But it is due to that this compulsory withdrawal defrost will cause this defrosting effect poor, will soon be removed into next time
Frost.So that defrosting number of times increase, influences heat transfer effect, or even influence the reliability of system operation.
The content of the invention
The main purpose of the embodiment of the present invention is to provide the defrosting control method and device of a kind of heat pump, it is intended to optimize
Bypass defrosting, improves the ability of defrost, reduces the number of times of defrost, improves air conditioner reliability of operation.
To achieve the above objectives, the embodiments of the invention provide a kind of defrosting control method of heat pump, including it is following
Step：
When meeting defrost entry condition in heat pump heating process, control heat pump carries out bypass
Frost, while recording the run time of defrost；
Outdoor heat exchanger pipe temperature T5, the first pipe temperature threshold met when T5 is exited more than defrost are constantly obtained when defrost is run
During value, or when detecting the duration of operation of defrost more than t4, control heat pump exits defrost；The pipe temperature T5 is system
The Guan Wen of outdoor heat exchanger porch during cold operation；
When the secondary condition for exiting defrost is to detect duration of operation of defrost to be more than t4, then current t4 is increased
Plus preset value.
Preferably, when meeting defrost entry condition in heat pump heating process, control heat pump is carried out
Bypass defrosting, while the step of recording the run time of defrost specifically includes：
The pipe temperature T3 of outdoor heat exchanger in the compressor start heating operation t1-t2 periods is obtained, and by the t1-t2 periods
T3 minimum value, is recorded as T30；The Guan Wen in outdoor heat exchanger exit when the pipe temperature T3 is refrigerating operaton；
The pipe temperature T5 of the outdoor heat exchanger is obtained after obtaining the compressor operating t3 times, and calculates △ T=T30-T5, its
Middle t3>t2；
When △ T enter the temperature difference threshold of fashionable satisfaction more than or equal to defrost, control heat pump carries out bypass defrosting, together
The run time of Shi Jilu defrosts.
Preferably, the control heat pump also includes after exiting defrost：
Control compressor restarts heating operation, and records its defrost number of times；
After the defrost number of times reaches n times, control heat pump carries out the tangential defrost of four-way valve, while recording defrost
Run time；
Outdoor heat exchanger pipe temperature T3 is constantly obtained when defrost is run, when the pipe temperature T3 of acquisition is gradually increasing and is higher than preset
Second pipe temperature threshold value, or when the pipe temperature T3 obtained is gradually increasing and is higher than the 3rd preset pipe temperature threshold value and continue more than t5
When, or when the run time of defrost is more than t6, control heat pump exits the tangential defrost of four-way valve；Wherein t5<t6.
Preferably, the control heat pump is exited after the tangential defrost of four-way valve, in addition to：
T4 is recovered to default initial value.
Accordingly, the embodiment of the present invention additionally provides a kind of defrosting control device of heat pump, including：
Defrost enters processing module, for when meeting defrost entry condition in heat pump heating process, controlling
Heat pumping system and carry out bypass defrosting, while recording the run time of defrost；
Temperature acquisition module, the pipe temperature T5 for obtaining outdoor heat exchanger；Changed when the pipe temperature T5 is refrigerating operaton outside room
The Guan Wen of hot device porch；
Processing module is exited in defrost, for met when T5 is exited more than defrost the first pipe temperature threshold value when, or detection
To defrost the duration of operation be more than t4 when, control heat pump exit defrost；And be inspection when working as the secondary condition for exiting defrost
When the duration of operation for measuring defrost is more than t4, then current t4 is increased into preset value.
Preferably, temperature acquisition module is additionally operable to：Obtain outdoor heat exchange in the compressor start heating operation t1-t2 periods
The pipe temperature T3 of device, and by t1-t2 periods T3 minimum value, it is recorded as T30；Outdoor heat exchange when the pipe temperature T3 is refrigerating operaton
The Guan Wen in device exit；
Defrost enter processing module specifically for：△ T=T30-T5 is calculated, and when △ T enter fashionable full more than or equal to defrost
During the temperature difference threshold of foot, control heat pump carries out bypass defrosting, while recording the run time of defrost；Wherein T5 is compressor
Pipe the temperature T5, wherein t3 of outdoor heat exchanger when running t3 times>t2.
Preferably, the defrost is exited processing module and is additionally operable to：After control heat pump exits defrost, compressor is controlled
Restart heating operation, and record its defrost number of times；Under four-way valve tangential defrost operation, when acquisition pipe temperature T3 gradually on
Rise and be higher than the second preset pipe temperature threshold value, or when the pipe temperature T3 obtained is gradually increasing and is higher than the 3rd preset pipe temperature threshold value
And when continuing more than t5, or when the duration of operation of defrost reaching t6, control heat pump exits four-way valve and tangentially changed
Frost；Wherein t5<t6；
The defrost is additionally operable into processing module：After the defrost number of times reaches n times, control heat pump carries out four
The tangential defrost of port valve, while recording the run time of defrost；
Temperature acquisition module is additionally operable to：Four-way valve tangential defrost constantly obtains the pipe temperature T3 of outdoor heat exchanger when running.
Preferably, the defrost exits processing module and is additionally operable to control heat pump to exit t4 after the tangential defrost of four-way valve
Recover to default initial value.
The present invention is by judging that whether the condition that bypass defrosting is exited is to be more than t4 the bypass defrosting duration, and bypassing
The condition that defrost is exited is that when the bypass defrosting duration being more than t4, current t4 is increased into preset value；It is other so as to effectively optimize
Tonghua frost, improves the ability of defrost, and then reduces the number of times of defrost, improves air conditioner reliability of operation.
Brief description of the drawings
Fig. 1 is the structural representation of the air-conditioning system of the defrosting control method application of heat pump of the present invention；
Fig. 2 is the schematic flow sheet of the defrosting control method first embodiment of heat pump of the present invention；
Fig. 3 is the schematic flow sheet of the defrosting control method second embodiment of heat pump of the present invention；
Fig. 4 is the schematic flow sheet of the defrosting control method 3rd embodiment of heat pump of the present invention；
Fig. 5 is the schematic flow sheet of the defrosting control method fourth embodiment of heat pump of the present invention；
Fig. 6 is the high-level schematic functional block diagram of the defrosting control device preferred embodiment of heat pump of the present invention.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
Technical scheme is further illustrated below in conjunction with Figure of description and specific embodiment.It should be appreciated that this
The specific embodiment of place description is not intended to limit the present invention only to explain the present invention.
Heat pump in the defrosting control method for the heat pump that the embodiment of the present invention is proposed will enter exemplified by air-conditioning system
Row explanation.As shown in figure 1, the air-conditioning system includes four-way valve 1, indoor heat exchanger 2, bypass solenoid valve 3, throttling arrangement 4, outdoor
Heat exchanger temperature-sensitive bag 51, outdoor heat exchanger temperature-sensitive bag 52, outdoor heat exchanger humidity sensor 53, outdoor heat exchanger 6, compressor sheet
Body 7, compressor liquid storage device 8, exhaust outlet of compressor 71, compressor liquid storage device air inlet 81.Wherein, outdoor heat exchanger temperature-sensitive bag 51
The entrance of outdoor heat exchanger 6 when being arranged on refrigerating operaton, the pipe temperature T5 for detecting outdoor heat exchanger 6.Outdoor heat exchanger
The near exit of outdoor heat exchanger 6 when temperature-sensitive bag 52 is arranged on refrigerating operaton, the pipe temperature T3 for detecting outdoor heat exchanger 6.When
Right heat pump is not limited to air-conditioning system, and other have the heat pump of identical function also in the protection of the embodiment of the present invention
Within the scope of.It is understood that in above-mentioned air conditioner, outdoor heat exchange when outdoor heat exchanger temperature-sensitive bag 51 is arranged on heating operation
The near exit of device 6, the entrance of outdoor heat exchanger 6 when outdoor heat exchanger temperature-sensitive bag 52 is arranged on heating operation.
Reference picture 2, the invention provides a kind of defrosting control method of heat pump, comprises the following steps：
Step S110, when meeting defrost entry condition in heat pump heating process, control heat pump enter
Row bypass defrosting, while recording the run time of defrost；
Specifically, above-mentioned defrost condition can be configured according to actual needs, for example can be by detecting outdoor heat exchanger
Pipe temperature T3, controls heat pump to enter bypass defrosting according to pipe temperature T3 size.
Constantly acquisition outdoor heat exchanger pipe temperature T5, preset when T5 is exited more than defrost when step S120, defrost operation
During the first pipe temperature threshold value, or when detecting the run time of defrost more than t4, control heat pump exits defrost；
During controlling heat pump progress bypass defrosting, continuous the pipe temperature T5 of outdoor heat exchanger will be detected, and judge
Whether T5 or the run time of defrost meet condition when defrost is exited（The the first pipe temperature threshold value met when i.e. defrost is exited or change
Duration of operation when frost is exited）.For example, judging the first pipe temperature threshold value met when T5 is exited more than defrost, or judge
During the duration of operation t4 when duration of operation of defrost exits more than defrost, then control heat pump to exit defrost, enter
Enter and commonly heat state.
Step S130, when when the secondary condition for exiting defrost be detect defrost the duration of operation be more than t4 when, then will
Current t4 increase preset values.
After bypass defrosting is being exited, it will determine that when secondary exit judges whether defrost is the duration of operation because defrost
More than t4, if so, then judging that the current defrost time is shorter, defrost is not complete enough.Then need to increase the time of compulsory withdrawal defrost
T4, so that reaching preferable defrost effect when next time into bypass defrosting.For example enter bypass defrosting in first time
When, t4 preset initial value is 10 minutes, if when the secondary condition for exiting bypass defrosting is the bypass defrosting duration to be more than 10 points
Clock.Then t4 modifications are adjusted to 12 minutes, after bypass defrosting is entered next time, the first pipe met when T5 is exited more than defrost
During warm threshold value, or when detecting the duration of operation of defrost more than 12 minutes, control heat pump exits defrost.
The present invention is by judging that whether the condition that bypass defrosting is exited is to be more than t4 the bypass defrosting duration, and bypassing
The condition that defrost is exited is that when the bypass defrosting duration being more than t4, current t4 is increased into preset value；It is other so as to effectively optimize
Tonghua frost, improves the ability of defrost, and then reduces the number of times of defrost, improves air conditioner reliability of operation.
Further, reference picture 3, it is proposed that the defrosting control method second embodiment of heat pump of the present invention.It is i.e. above-mentioned
Step S110 includes：
Step S111, the pipe temperature T3 for obtaining outdoor heat exchanger in the compressor start normal heating operation t1-t2 periods, and
By t1-t2 periods T3 minimum value, T30 is recorded as；
In the present embodiment, the Guan Wen of outdoor heat exchanger in the t1-t2 periods under the normal heating operation of compressor can be detected
T3, pipe temperature T3 detection is detected in real time by the temperature-sensitive bag 52 being disposed in the outdoor on heat exchanger.Then institute is compared again
Detect and minimum in all T3 values be recorded as T30.Minimum value T30 is set to be due to that T5 relative minimums T30 is also low herein
△T（△T=T30-T5）When, it is ensured that outdoor heat exchanger is the defrost in the case where there is frost, prevents the hair of frostless defrost phenomenon
It is raw, outdoor heat exchanger frosting situation can be more accurately judged, so as to realize accurate control defrost.
Step S112, judge whether the run time of compressor reaches t3；It is to be transferred to step S113, is otherwise transferred to step
S112；
Step S113, the pipe temperature T5 for obtaining outdoor heat exchanger, and calculate △ T=T30-T5；
T30 is by the outdoor heat exchange detected by temperature-sensitive bag 52 within the compressor start heating operation t1-t2 periods
The Guan Wen of device minimum value；T5 is by the outdoor heat exchange detected by temperature-sensitive bag 51 after the compressor start heating operation t3 times
The Guan Wen of device.Wherein, time when t1, t2, t3 are relative to compressor start, and t1<t2<t3.And pipe temperature T5 is also
Detection in real time.
Step S114, judge whether △ T enter fashionable preset temperature difference threshold more than or equal to defrost；It is to be transferred to step
S115, is otherwise transferred to step S113；
Step S115, control heat pump carry out bypass defrosting, while recording the run time of defrost；
Heat pump is controlled to carry out bypass defrosting, such as by-passing valve is opened, and exhaust is directly entered outdoor heat exchanger entrance simultaneously
Carry out defrost.Meanwhile, record the run time of defrost.
Above-mentioned control heat pump is exited after defrost, can restart normal heating operation, and circulate execution above-mentionedization
The control flow of frost.And in order to ensure that defrost is clean under any humidity condition, the comfortableness for not influenceing user to use, the present invention
Additionally provide another embodiment of defrosting control method of heat pump.As shown in figure 4, in a upper embodiment（That is second embodiment）
On the basis of, third embodiment of the invention exits defrost in control heat pump（That is above-mentioned steps S130）Also include afterwards：
Step S140, defrost number of times is counted, control heat pump starts normal heating operation；
When controlling heat pump to exit defrost, its defrost number of times is recorded, i.e. defrost number of times is started counting up from 0.Meanwhile, control
Heat pumping system and start normal heating operation.
Step S150, judge whether defrost number of times reaches n times；It is to be transferred to step S160, otherwise, return to step S110；
Step S160, control heat pump carry out the tangential defrost of four-way valve, while recording the run time of defrost；
In the present embodiment, n is 10.I.e. when defrost number of times reaches 10 times, then using special defrost pattern.Control heat pump
System carries out the tangential defrost of four-way valve.Specially：When defrost starts, compressor frequency reducing operation, four-way valve, indoor fan, outdoor
Blower fan is closed.Then compressor raising frequency is to defrost frequency shelves, into defrost.The run time of defrost is recorded simultaneously.
Outdoor heat exchanger pipe temperature T3 is constantly obtained when step S170, defrost operation, when the pipe temperature T3 of acquisition is gradually increasing simultaneously
Higher than the second preset pipe temperature threshold value, or when the pipe temperature T3 obtained is gradually increasing and is higher than the 3rd preset pipe temperature threshold value and holds
During continuous more than second preset time t5, or when the run time of defrost reaches the 3rd preset time t6, heat pump is controlled
Exit the tangential defrost of four-way valve.
During controlling the heat pump progress tangential defrost of four-way valve, the pipe temperature T3 of outdoor heat exchanger will be constantly detected,
And judge whether the run time of pipe temperature T3 or defrost meets condition when defrost is exited：
1. when the pipe temperature T3 of outdoor heat exchanger rises and is higher than the second pipe temperature threshold value（For example, 18 DEG C）When；
2. when the pipe temperature T3 of outdoor heat exchanger rises and is higher than the 3rd pipe temperature threshold value（For example, 8.0 DEG C）And it is pre- to continue second
Put time t5（For example, 80 seconds）When；
3. when defrost run time continues the 3rd preset time t6（For example, 15 minutes）When.
As long as meeting any of the above-described condition, you can control heat pump exits the tangential defrost of four-way valve.Wherein, t5<t6.
Further, reference picture 5, Fig. 5 is that the flow of the defrosting control method fourth embodiment of heat pump of the present invention is shown
It is intended to；Based on 3rd embodiment, in the fourth embodiment, the control heat pump in above-mentioned steps S180 is performed exits four-way
After the tangential defrost of valve, in addition to：
Step S180, t4 is recovered to default initial value., can after the tangential defrost of progress four-way valve in the present embodiment
T4 was recovered to 10 minutes, so as to go back original system, it is ensured that the stability of system operation.
The following is the application example of defrosting control method one of heat pump of the present invention.
For example, in the pipe temperature T3 of outdoor heat exchanger detection time section t1 be 7 minutes, t2 be 12 minutes, outdoor heat exchanger
Pipe temperature T5 beginning detection time t3 be 25 minutes, defrost enter fashionable satisfaction temperature difference threshold be 5.5 DEG C, when defrost is exited expire
First pipe temperature threshold value of foot is 4 DEG C, and the run time t4 of defrost when defrost is exited is 10 minutes, and above-mentioned preset value is 2 minutes.
In addition, in special defrost pattern, when defrost number of times is 10 times, into special defrost pattern；The condition that defrost is exited
It is：
First meet following three condition terminates special defrost, restarts normal heating operation.
1. when the pipe temperature T3 of outdoor heat exchanger rises above 18 DEG C；
2. when the pipe temperature T3 of outdoor heat exchanger rises above 8.0 DEG C of value and continues 80 seconds；
3. when defrost run time continues 15 minutes.
The idiographic flow for carrying out defrost by the control model of above-mentioned defrost is as follows：
Step 1：Compressor start starts heating operation, starts timing；
Step 2：Normal heating operation t1=7 minute of compressor start are detected to the minutes of t2=12 section T3 temperature value,
And record t1 to t2 periods T3 minimum value T30；
Step 3：When air-conditioner set run time t reaches specified operation time tCDA1=25 minute, outdoor heat exchange is detected
Device pipe temperature T5, and calculate △ T, wherein △ T=T30-T5；
Step 4：When Δ T=T30-T5 >=5.5 DEG C, air-conditioner set enters defrost.
Step 5：Constantly detection outdoor heat exchanger pipe temperature T5, when detecting T5 more than 4 DEG C, or is detected when defrost is run
Defrost run time exits defrost process when being more than 10 minutes, and when being more than t4 when the reason for exiting defrost for the defrost time, then
Current t4 is adjusted to t4+2；
Step 6：Record defrost number of times；
Step 7：When defrost number of times is not up to 10 times, then into normal heating operation, restart timing.
Step 8：When defrost number of times reaches n=10 time, then heat pump is controlled to enter special defrost pattern, and becoming privileged
T4 is adjusted to 10 minutes by white pattern after terminating.
Correspondence above method embodiment, the present invention also provides a kind of defrosting control device of heat pump, as shown in Figure 6.
The defrosting control device of the heat pump includes：
Defrost enters processing module 100, for when meeting defrost entry condition in heat pump heating process,
Heat pump is controlled to carry out bypass defrosting, while recording the run time of defrost；
Specifically, above-mentioned defrost condition can be configured according to actual needs, for example can be by detecting outdoor heat exchanger
Pipe temperature T5, controls heat pump to enter bypass defrosting according to pipe temperature T5 size.
Temperature acquisition module 200, the pipe temperature T5 for obtaining outdoor heat exchanger；
Processing module 300 is exited in defrost, for met when T5 is exited more than defrost the first pipe temperature threshold value when, Huo Zhejian
When the duration of operation for measuring defrost is more than t4, control heat pump exits defrost；And be when working as the secondary condition for exiting defrost
When the duration of operation for detecting defrost is more than t4, then current t4 is increased into preset value.
During controlling heat pump progress bypass defrosting, continuous the pipe temperature T5 of outdoor heat exchanger will be detected, and judge
Whether T5 or the run time of defrost meet condition when defrost is exited（The the first pipe temperature threshold value met when i.e. defrost is exited or change
Duration of operation when frost is exited）.For example, judging the first pipe temperature threshold value met when T5 is exited more than defrost, or judge
During the duration of operation t4 when duration of operation of defrost exits more than defrost, then control heat pump to exit defrost, enter
Enter and commonly heat state.
After bypass defrosting is being exited, it will determine that when secondary exit judges whether defrost is the duration of operation because defrost
More than t4, if so, then judging that the current defrost time is shorter, defrost is not complete enough.Then need to increase the time of compulsory withdrawal defrost
T4, so that reaching preferable defrost effect when next time into bypass defrosting.For example enter bypass defrosting in first time
When, t4 preset initial value is 10 minutes, if when the secondary condition for exiting bypass defrosting is the bypass defrosting duration to be more than 10 points
Clock.Then t4 modifications are adjusted to 12 minutes, after bypass defrosting is entered next time, the first pipe met when T5 is exited more than defrost
During warm threshold value, or when detecting the duration of operation of defrost more than 12 minutes, control heat pump exits defrost.
The present invention exits whether the condition that processing module 300 judges that bypass defrosting exits is that bypass defrosting is lasting by defrost
Time is more than t4, and when the condition that bypass defrosting is exited is the bypass defrosting duration to be more than t4, current t4 is increased into pre-
Put value；So as to effectively optimize bypass defrosting, the ability of defrost is improved, and then reduces the number of times of defrost, air conditioner is improved
Reliability of operation.
Further, based on above-described embodiment, in the present embodiment, said temperature acquisition module 200 is additionally operable to：Obtain compression
Machine starts the pipe temperature T3 of outdoor heat exchanger in the heating operation t1-t2 periods, and by t1-t2 periods T3 minimum value, records
For T30；The Guan Wen in outdoor heat exchanger exit when the pipe temperature T3 is refrigerating operaton；
Defrost enter processing module 100 specifically for：△ T=T30-T5 is calculated, and when △ T enter more than or equal to defrost
When meet temperature difference threshold when, control heat pump carry out bypass defrosting, while record defrost run time；Wherein T5 is pressure
Pipe the temperature T5, wherein t3 of outdoor heat exchanger during contracting machine operation t3 times>t2.
Please with reference to shown in Fig. 1, said temperature acquisition module 200 can include being disposed in the outdoor near heat exchanger entrance
Temperature-sensitive bag 51 and the temperature-sensitive bag 52 that is disposed in the outdoor near heat exchanger exit, to the Guan Wen applied to sensing chamber's external heat exchanger
T5、T3；The control unit of temperature detection can certainly be carried out for the temperature-sensitive bag 51 and temperature-sensitive bag 52 of control outdoor heat exchanger.One
In embodiment, the temperature acquisition module 200 can set a timer, and under the normal heating operation of compressor during t1-t2
Between in section control temperature-sensitive bag 52 the pipe temperature of outdoor heat exchanger is detected, to obtain pipe temperature T3.Can also be in compressor operating
During t3 times, Perceived control thermometer bulb 51 is detected to the pipe temperature of outdoor heat exchanger, to obtain pipe temperature T5.Can also be in heat pump
When carrying out defrost, Perceived control thermometer bulb 52 is detected in real time to the pipe temperature of outdoor heat exchanger, to obtain pipe temperature T3.Another embodiment party
In formula, temperature-sensitive bag 51 and temperature-sensitive bag 52 can also detect the Guan Wen of outdoor heat exchanger in real time, and send in real time into heat pump
Memory in stored.Temperature acquisition module 200 then from memory obtain the normal heating operation of compressor under t1-t2
The pipe temperature T5 that temperature-sensitive bag 51 is detected when pipe temperature T3 that period inner sense thermometer bulb 52 is detected, compressor operating t3 time, and
The pipe temperature T5 that temperature-sensitive bag 51 is detected when heat pump carries out bypass defrosting.
Then defrost defrost enters the calculating △ of processing module 100 T=T30-T5, and when △ T enter fashionable more than or equal to defrost
During the temperature difference threshold of satisfaction, control heat pump carries out bypass defrosting, and such as by-passing valve is opened, and exhaust is directly entered outdoor heat exchange
Device entrance simultaneously carries out defrost.The run time of defrost is recorded simultaneously.Moreover, carrying out the process of bypass defrosting in control heat pump
In, temperature acquisition module 200 will constantly obtain the pipe temperature T5 of outdoor heat exchanger.Defrost exits processing module 300 and judges T5 and change
The run time of frost, to judge whether to exit defrost.For example, judge the first pipe temperature threshold value met when T5 is exited more than defrost,
Or when judging duration of operation t4 when duration of operation of defrost exits more than defrost, then control heat pump to exit
Defrost.
Above-mentioned control heat pump is exited after defrost, can restart normal heating operation, and circulate execution above-mentionedization
The control flow of frost.However, to ensure that defrost is clean under any humidity condition, the comfortableness for not influenceing user to use, this hair
Bright another embodiment of the defrosting control method for additionally providing heat pump.Specially：
The defrost is exited processing module 300 and is additionally operable to：After control heat pump exits defrost, control compressor is again
Start heating operation, and record its defrost number of times；Under the tangential defrost operation of four-way valve, when the pipe temperature T3 of acquisition is gradually increasing simultaneously
Higher than the second preset pipe temperature threshold value, or when the pipe temperature T3 obtained is gradually increasing and is higher than the 3rd preset pipe temperature threshold value and holds
During continuous more than t5, or when the duration of operation of defrost reaching t6, control heat pump exits the tangential defrost of four-way valve；Its
Middle t5<t6；
The defrost is additionally operable into processing module 100：After the defrost number of times reaches n times, control heat pump enters
The tangential defrost of row four-way valve, while recording the run time of defrost；
Temperature acquisition module 200 is additionally operable to：Four-way valve tangential defrost constantly obtains the pipe temperature T3 of outdoor heat exchanger when running.
Above-mentioned defrost exits processing module 300 when controlling heat pump to exit defrost, records its defrost number of times, i.e. defrost
Number of times is started counting up from 0.Meanwhile, control heat pump starts normal heating operation.In the present embodiment, when defrost number of times reaches 10
When secondary, then using special defrost pattern.That is control heat pump carries out the tangential defrost of four-way valve.Specially：When defrost starts, pressure
The frequency reducing of contracting machine is run, and four-way valve, indoor fan, outdoor fan are closed.Then compressor raising frequency is to defrost frequency shelves, into change
Frost.The run time of defrost is recorded simultaneously.
During controlling the heat pump progress tangential defrost of four-way valve, temperature acquisition module 200 will constantly obtain outdoor
The pipe temperature T3 of heat exchanger, exits processing module 300 for defrost and judges whether the run time of T3 or defrost meets defrost and exit
When condition：
1. when the pipe temperature T3 of outdoor heat exchanger rises and is higher than the second pipe temperature threshold value（For example, 18 DEG C）When；
2. when the pipe temperature T3 of outdoor heat exchanger rises and is higher than the 3rd pipe temperature threshold value（For example, 8.0 DEG C）And it is pre- to continue second
Put time t5（For example, 80 seconds）When；
3. when defrost run time continues the 3rd preset time t6（For example, 15 minutes）When.
As long as meeting any of the above-described condition, you can control heat pump exits the tangential defrost of four-way valve.Wherein, t5<t6.
Further, based on above-described embodiment, in the present embodiment, above-mentioned defrost exit processing module 300 can be additionally used in by
T4 recovers to default initial value.In the present embodiment, after the tangential defrost of progress four-way valve, t4 can be recovered to 10 minutes, from
And go back original system, it is ensured that the stability of system operation.
The embodiments of the present invention are for illustration only, and the quality of embodiment is not represented.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Understood based on such, technical scheme is substantially done to prior art in other words
Going out the part of contribution can be embodied in the form of software product, and the computer software product is stored in a storage medium
（Such as ROM/RAM, magnetic disc, CD）In, including some instructions are to cause a station terminal equipment（Can be mobile phone, computer, clothes
Business device, or network equipment etc.）Perform the method described in each embodiment of the invention.
The preferred embodiments of the present invention are the foregoing is only, its scope of the claims is not thereby limited, it is every to utilize the present invention
Equivalent structure or equivalent flow conversion that specification and accompanying drawing content are made, are directly or indirectly used in other related technology necks
Domain, is included within the scope of the present invention.
Claims (8)
1. a kind of defrosting control method of heat pump, it is characterised in that comprise the following steps：
When meeting defrost entry condition in heat pump heating process, control heat pump carries out bypass defrosting, together
The run time of Shi Jilu defrosts；
Outdoor heat exchanger pipe temperature T5, the first pipe temperature threshold value met when T5 is exited more than defrost are constantly obtained when defrost is run
When, or when detecting the duration of operation of defrost more than t4, control heat pump exits defrost；The pipe temperature T5 is refrigeration
The Guan Wen of outdoor heat exchanger porch during operation；
When the secondary condition for exiting defrost is to detect duration of operation of defrost to be more than t4, then current t4 is increased pre-
Value is put, for the bypass defrosting of next time.
2. the defrosting control method of heat pump as claimed in claim 1, it is characterised in that when in heat pump heating operation
During when meeting defrost entry condition, control heat pump carries out bypass defrosting, while recording the step of the run time of defrost
Suddenly specifically include：
The pipe temperature T3 of outdoor heat exchanger in the compressor start heating operation t1-t2 periods is obtained, and by t1-t2 periods T3's
Minimum value, is recorded as T30；The Guan Wen in outdoor heat exchanger exit when the pipe temperature T3 is refrigerating operaton；
The pipe temperature T5 of the outdoor heat exchanger is obtained after obtaining the compressor operating t3 times, and calculates △ T=T30-T5, wherein t3
>t2；
When △ T enter the temperature difference threshold of fashionable satisfaction more than or equal to defrost, control heat pump carries out bypass defrosting, remembers simultaneously
Record the run time of defrost.
3. the defrosting control method of heat pump as claimed in claim 2, it is characterised in that the control heat pump is exited
Also include after defrost：
Control compressor restarts heating operation, and records its defrost number of times；
After the defrost number of times reaches n times, control heat pump carries out the tangential defrost of four-way valve, while recording the operation of defrost
Time；
Outdoor heat exchanger pipe temperature T3 is constantly obtained when defrost is run, when the pipe temperature T3 of acquisition is gradually increasing and is higher than preset second
Pipe temperature threshold value, or when the pipe temperature T3 of acquisition is gradually increasing and be higher than the 3rd preset pipe temperature threshold value and continue more than t5 when, or
Person is when the run time of defrost is more than t6, and control heat pump exits the tangential defrost of four-way valve；Wherein t5<t6.
4. the defrosting control method of heat pump as claimed in claim 3, it is characterised in that the control heat pump is exited
After the tangential defrost of four-way valve, in addition to：
T4 is recovered to default initial value.
5. a kind of defrosting control device of heat pump, it is characterised in that including：
Defrost enters processing module, for when meeting defrost entry condition in heat pump heating process, control to be hot
Pumping system carries out bypass defrosting, while recording the run time of defrost；
Temperature acquisition module, the pipe temperature T5 for obtaining outdoor heat exchanger；Outdoor heat exchanger when the pipe temperature T5 is refrigerating operaton
The Guan Wen of porch；
Processing module is exited in defrost, for met when T5 is exited more than defrost the first pipe temperature threshold value when, or detecting
When the duration of operation of frost is more than t4, control heat pump exits defrost；And be to detect when working as the secondary condition for exiting defrost
When the duration of operation of defrost is more than t4, then current t4 is increased into preset value, for the bypass defrosting of next time.
6. the defrosting control device of heat pump as claimed in claim 5, it is characterised in that
Temperature acquisition module is additionally operable to：The pipe temperature T3 of outdoor heat exchanger in the compressor start heating operation t1-t2 periods is obtained,
And by t1-t2 periods T3 minimum value, it is recorded as T30；Outdoor heat exchanger exit when the pipe temperature T3 is refrigerating operaton
Guan Wen；
Defrost enter processing module specifically for：△ T=T30-T5 are calculated, and when △ T enter fashionable satisfaction more than or equal to defrost
Temperature difference threshold when, control heat pump carry out bypass defrosting, while record defrost run time；Wherein T5 transports for compressor
Pipe the temperature T5, wherein t3 of outdoor heat exchanger during row t3 time>t2.
7. the defrosting control device of heat pump as claimed in claim 6, it is characterised in that processing module is exited in the defrost
It is additionally operable to：After control heat pump exits defrost, control compressor restarts heating operation, and records its defrost number of times；
Under four-way valve tangential defrost operation, when the pipe temperature T3 of acquisition is gradually increasing and is higher than the second preset pipe temperature threshold value, or ought
When the pipe temperature T3 of acquisition is gradually increasing and is higher than the 3rd preset pipe temperature threshold value and continues more than t5, or when the operation of defrost is held
When the continuous time reaches t6, control heat pump exits the tangential defrost of four-way valve；Wherein t5<t6；
The defrost is additionally operable into processing module：After the defrost number of times reaches n times, control heat pump carries out four-way valve
Tangential defrost, while recording the run time of defrost；
Temperature acquisition module is additionally operable to：Four-way valve tangential defrost constantly obtains the pipe temperature T3 of outdoor heat exchanger when running.
8. the defrosting control device of heat pump as claimed in claim 7, it is characterised in that processing module is exited in the defrost
It is additionally operable to control heat pump and exits after the tangential defrost of four-way valve recover t4 to default initial value.
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| CN201410004345.4A CN104764263B (en) | 2014-01-02 | 2014-01-02 | The defrosting control method and device of heat pump |
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| CN201410004345.4A CN104764263B (en) | 2014-01-02 | 2014-01-02 | The defrosting control method and device of heat pump |
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| CN104764263B true CN104764263B (en) | 2017-09-26 |
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Families Citing this family (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106705302B (en) * | 2017-01-10 | 2019-07-19 | 美的集团武汉制冷设备有限公司 | Air conditioner, defrosting control method and defrosting control system |
| CN106765983A (en) * | 2017-01-10 | 2017-05-31 | 美的集团武汉制冷设备有限公司 | Defrosting control method, defrosting control system and air-conditioner |
| CN106642595A (en) * | 2017-01-10 | 2017-05-10 | 美的集团武汉制冷设备有限公司 | Air conditioner and defrosting control method thereof |
| CN106594937A (en) * | 2017-01-10 | 2017-04-26 | 美的集团武汉制冷设备有限公司 | Air conditioner, and defrosting control method and system |
| CN106765778B (en) * | 2017-01-10 | 2019-09-27 | 美的集团武汉制冷设备有限公司 | The defrosting control method of air conditioner and air conditioner |
| CN106705304A (en) * | 2017-01-10 | 2017-05-24 | 美的集团武汉制冷设备有限公司 | Air conditioner and defrosting control method of air conditioner |
| CN108195026B (en) * | 2017-12-21 | 2020-05-26 | 广东美的暖通设备有限公司 | Defrosting control method, control device, air conditioner and readable storage medium |
| CN110736212B (en) * | 2019-09-27 | 2022-04-19 | 青岛海尔空调器有限总公司 | Control method and control device for defrosting of air conditioner and air conditioner |
| CN111503823A (en) * | 2020-04-29 | 2020-08-07 | 广东美的制冷设备有限公司 | Control method of air conditioning system and air conditioning system |
| CN112839482B (en) * | 2020-12-11 | 2024-05-31 | 青岛海尔新能源电器有限公司 | Heat pump unit and heat dissipation control method of controller |
| CN114646131B (en) * | 2022-03-21 | 2023-10-27 | 广东开利暖通空调股份有限公司 | Defrosting method of air conditioner |
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